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gmqcc/parser.c
Wolfgang Bumiller 0f506e768b sometimes I hate travis
2014-01-07 15:04:29 +01:00

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/*
* Copyright (C) 2012, 2013, 2014
* Wolfgang Bumiller
* Dale Weiler
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <string.h>
#include <math.h>
#include "parser.h"
#define PARSER_HT_LOCALS 2
#define PARSER_HT_SIZE 512
#define TYPEDEF_HT_SIZE 512
static void parser_enterblock(parser_t *parser);
static bool parser_leaveblock(parser_t *parser);
static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e);
static void parser_addglobal(parser_t *parser, const char *name, ast_expression *e);
static bool parse_typedef(parser_t *parser);
static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int qualifier, ast_value *cached_typedef, bool noref, bool is_static, uint32_t qflags, char *vstring);
static ast_block* parse_block(parser_t *parser);
static bool parse_block_into(parser_t *parser, ast_block *block);
static bool parse_statement_or_block(parser_t *parser, ast_expression **out);
static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases);
static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma, bool truthvalue, bool with_labels);
static ast_expression* parse_expression(parser_t *parser, bool stopatcomma, bool with_labels);
static ast_value* parser_create_array_setter_proto(parser_t *parser, ast_value *array, const char *funcname);
static ast_value* parser_create_array_getter_proto(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname);
static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef, bool *is_vararg);
static void parseerror(parser_t *parser, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vcompile_error(parser->lex->tok.ctx, fmt, ap);
va_end(ap);
}
/* returns true if it counts as an error */
static bool GMQCC_WARN parsewarning(parser_t *parser, int warntype, const char *fmt, ...)
{
bool r;
va_list ap;
va_start(ap, fmt);
r = vcompile_warning(parser->lex->tok.ctx, warntype, fmt, ap);
va_end(ap);
return r;
}
/**********************************************************************
* parsing
*/
static bool parser_next(parser_t *parser)
{
/* lex_do kills the previous token */
parser->tok = lex_do(parser->lex);
if (parser->tok == TOKEN_EOF)
return true;
if (parser->tok >= TOKEN_ERROR) {
parseerror(parser, "lex error");
return false;
}
return true;
}
#define parser_tokval(p) ((p)->lex->tok.value)
#define parser_token(p) (&((p)->lex->tok))
char *parser_strdup(const char *str)
{
if (str && !*str) {
/* actually dup empty strings */
char *out = (char*)mem_a(1);
*out = 0;
return out;
}
return util_strdup(str);
}
static ast_expression* parser_find_field(parser_t *parser, const char *name)
{
return ( ast_expression*)util_htget(parser->htfields, name);
}
static ast_expression* parser_find_label(parser_t *parser, const char *name)
{
size_t i;
for(i = 0; i < vec_size(parser->labels); i++)
if (!strcmp(parser->labels[i]->name, name))
return (ast_expression*)parser->labels[i];
return NULL;
}
ast_expression* parser_find_global(parser_t *parser, const char *name)
{
ast_expression *var = (ast_expression*)util_htget(parser->aliases, parser_tokval(parser));
if (var)
return var;
return (ast_expression*)util_htget(parser->htglobals, name);
}
static ast_expression* parser_find_param(parser_t *parser, const char *name)
{
size_t i;
ast_value *fun;
if (!parser->function)
return NULL;
fun = parser->function->vtype;
for (i = 0; i < vec_size(fun->expression.params); ++i) {
if (!strcmp(fun->expression.params[i]->name, name))
return (ast_expression*)(fun->expression.params[i]);
}
return NULL;
}
static ast_expression* parser_find_local(parser_t *parser, const char *name, size_t upto, bool *isparam)
{
size_t i, hash;
ast_expression *e;
hash = util_hthash(parser->htglobals, name);
*isparam = false;
for (i = vec_size(parser->variables); i > upto;) {
--i;
if ( (e = (ast_expression*)util_htgeth(parser->variables[i], name, hash)) )
return e;
}
*isparam = true;
return parser_find_param(parser, name);
}
static ast_expression* parser_find_var(parser_t *parser, const char *name)
{
bool dummy;
ast_expression *v;
v = parser_find_local(parser, name, 0, &dummy);
if (!v) v = parser_find_global(parser, name);
return v;
}
static ast_value* parser_find_typedef(parser_t *parser, const char *name, size_t upto)
{
size_t i, hash;
ast_value *e;
hash = util_hthash(parser->typedefs[0], name);
for (i = vec_size(parser->typedefs); i > upto;) {
--i;
if ( (e = (ast_value*)util_htgeth(parser->typedefs[i], name, hash)) )
return e;
}
return NULL;
}
typedef struct
{
size_t etype; /* 0 = expression, others are operators */
bool isparen;
size_t off;
ast_expression *out;
ast_block *block; /* for commas and function calls */
lex_ctx_t ctx;
} sy_elem;
enum {
PAREN_EXPR,
PAREN_FUNC,
PAREN_INDEX,
PAREN_TERNARY1,
PAREN_TERNARY2
};
typedef struct
{
sy_elem *out;
sy_elem *ops;
size_t *argc;
unsigned int *paren;
} shunt;
static sy_elem syexp(lex_ctx_t ctx, ast_expression *v) {
sy_elem e;
e.etype = 0;
e.off = 0;
e.out = v;
e.block = NULL;
e.ctx = ctx;
e.isparen = false;
return e;
}
static sy_elem syblock(lex_ctx_t ctx, ast_block *v) {
sy_elem e;
e.etype = 0;
e.off = 0;
e.out = (ast_expression*)v;
e.block = v;
e.ctx = ctx;
e.isparen = false;
return e;
}
static sy_elem syop(lex_ctx_t ctx, const oper_info *op) {
sy_elem e;
e.etype = 1 + (op - operators);
e.off = 0;
e.out = NULL;
e.block = NULL;
e.ctx = ctx;
e.isparen = false;
return e;
}
static sy_elem syparen(lex_ctx_t ctx, size_t off) {
sy_elem e;
e.etype = 0;
e.off = off;
e.out = NULL;
e.block = NULL;
e.ctx = ctx;
e.isparen = true;
return e;
}
/* With regular precedence rules, ent.foo[n] is the same as (ent.foo)[n],
* so we need to rotate it to become ent.(foo[n]).
*/
static bool rotate_entfield_array_index_nodes(ast_expression **out)
{
ast_array_index *index, *oldindex;
ast_entfield *entfield;
ast_value *field;
ast_expression *sub;
ast_expression *entity;
lex_ctx_t ctx = ast_ctx(*out);
if (!ast_istype(*out, ast_array_index))
return false;
index = (ast_array_index*)*out;
if (!ast_istype(index->array, ast_entfield))
return false;
entfield = (ast_entfield*)index->array;
if (!ast_istype(entfield->field, ast_value))
return false;
field = (ast_value*)entfield->field;
sub = index->index;
entity = entfield->entity;
oldindex = index;
index = ast_array_index_new(ctx, (ast_expression*)field, sub);
entfield = ast_entfield_new(ctx, entity, (ast_expression*)index);
*out = (ast_expression*)entfield;
oldindex->array = NULL;
oldindex->index = NULL;
ast_delete(oldindex);
return true;
}
static bool check_write_to(lex_ctx_t ctx, ast_expression *expr)
{
if (ast_istype(expr, ast_value)) {
ast_value *val = (ast_value*)expr;
if (val->cvq == CV_CONST) {
if (val->name[0] == '#') {
compile_error(ctx, "invalid assignment to a literal constant");
return false;
}
/*
* To work around quakeworld we must elide the error and make it
* a warning instead.
*/
if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_QCC)
compile_error(ctx, "assignment to constant `%s`", val->name);
else
(void)!compile_warning(ctx, WARN_CONST_OVERWRITE, "assignment to constant `%s`", val->name);
return false;
}
}
return true;
}
static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
{
const oper_info *op;
lex_ctx_t ctx;
ast_expression *out = NULL;
ast_expression *exprs[3];
ast_block *blocks[3];
ast_binstore *asbinstore;
size_t i, assignop, addop, subop;
qcint_t generated_op = 0;
char ty1[1024];
char ty2[1024];
if (!vec_size(sy->ops)) {
parseerror(parser, "internal error: missing operator");
return false;
}
if (vec_last(sy->ops).isparen) {
parseerror(parser, "unmatched parenthesis");
return false;
}
op = &operators[vec_last(sy->ops).etype - 1];
ctx = vec_last(sy->ops).ctx;
if (vec_size(sy->out) < op->operands) {
if (op->flags & OP_PREFIX)
compile_error(ctx, "expected expression after unary operator `%s`", op->op, (int)op->id);
else /* this should have errored previously already */
compile_error(ctx, "expected expression after operator `%s`", op->op, (int)op->id);
return false;
}
vec_shrinkby(sy->ops, 1);
/* op(:?) has no input and no output */
if (!op->operands)
return true;
vec_shrinkby(sy->out, op->operands);
for (i = 0; i < op->operands; ++i) {
exprs[i] = sy->out[vec_size(sy->out)+i].out;
blocks[i] = sy->out[vec_size(sy->out)+i].block;
if (exprs[i]->vtype == TYPE_NOEXPR &&
!(i != 0 && op->id == opid2('?',':')) &&
!(i == 1 && op->id == opid1('.')))
{
if (ast_istype(exprs[i], ast_label))
compile_error(ast_ctx(exprs[i]), "expected expression, got an unknown identifier");
else
compile_error(ast_ctx(exprs[i]), "not an expression");
(void)!compile_warning(ast_ctx(exprs[i]), WARN_DEBUG, "expression %u\n", (unsigned int)i);
}
}
if (blocks[0] && !vec_size(blocks[0]->exprs) && op->id != opid1(',')) {
compile_error(ctx, "internal error: operator cannot be applied on empty blocks");
return false;
}
#define NotSameType(T) \
(exprs[0]->vtype != exprs[1]->vtype || \
exprs[0]->vtype != T)
switch (op->id)
{
default:
compile_error(ctx, "internal error: unhandled operator: %s (%i)", op->op, (int)op->id);
return false;
case opid1('.'):
if (exprs[0]->vtype == TYPE_VECTOR &&
exprs[1]->vtype == TYPE_NOEXPR)
{
if (exprs[1] == (ast_expression*)parser->const_vec[0])
out = (ast_expression*)ast_member_new(ctx, exprs[0], 0, NULL);
else if (exprs[1] == (ast_expression*)parser->const_vec[1])
out = (ast_expression*)ast_member_new(ctx, exprs[0], 1, NULL);
else if (exprs[1] == (ast_expression*)parser->const_vec[2])
out = (ast_expression*)ast_member_new(ctx, exprs[0], 2, NULL);
else {
compile_error(ctx, "access to invalid vector component");
return false;
}
}
else if (exprs[0]->vtype == TYPE_ENTITY) {
if (exprs[1]->vtype != TYPE_FIELD) {
compile_error(ast_ctx(exprs[1]), "type error: right hand of member-operand should be an entity-field");
return false;
}
out = (ast_expression*)ast_entfield_new(ctx, exprs[0], exprs[1]);
}
else if (exprs[0]->vtype == TYPE_VECTOR) {
compile_error(ast_ctx(exprs[1]), "vectors cannot be accessed this way");
return false;
}
else {
compile_error(ast_ctx(exprs[1]), "type error: member-of operator on something that is not an entity or vector");
return false;
}
break;
case opid1('['):
if (exprs[0]->vtype != TYPE_ARRAY &&
!(exprs[0]->vtype == TYPE_FIELD &&
exprs[0]->next->vtype == TYPE_ARRAY))
{
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[0]), "cannot index value of type %s", ty1);
return false;
}
if (exprs[1]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[1]), "index must be of type float, not %s", ty1);
return false;
}
out = (ast_expression*)ast_array_index_new(ctx, exprs[0], exprs[1]);
if (rotate_entfield_array_index_nodes(&out))
{
#if 0
/* This is not broken in fteqcc anymore */
if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
/* this error doesn't need to make us bail out */
(void)!parsewarning(parser, WARN_EXTENSIONS,
"accessing array-field members of an entity without parenthesis\n"
" -> this is an extension from -std=gmqcc");
}
#endif
}
break;
case opid1(','):
if (vec_size(sy->paren) && vec_last(sy->paren) == PAREN_FUNC) {
vec_push(sy->out, syexp(ctx, exprs[0]));
vec_push(sy->out, syexp(ctx, exprs[1]));
vec_last(sy->argc)++;
return true;
}
if (blocks[0]) {
if (!ast_block_add_expr(blocks[0], exprs[1]))
return false;
} else {
blocks[0] = ast_block_new(ctx);
if (!ast_block_add_expr(blocks[0], exprs[0]) ||
!ast_block_add_expr(blocks[0], exprs[1]))
{
return false;
}
}
ast_block_set_type(blocks[0], exprs[1]);
vec_push(sy->out, syblock(ctx, blocks[0]));
return true;
case opid2('+','P'):
out = exprs[0];
break;
case opid2('-','P'):
if ((out = fold_op(parser->fold, op, exprs)))
break;
if (exprs[0]->vtype != TYPE_FLOAT &&
exprs[0]->vtype != TYPE_VECTOR) {
compile_error(ctx, "invalid types used in unary expression: cannot negate type %s",
type_name[exprs[0]->vtype]);
return false;
}
if (exprs[0]->vtype == TYPE_FLOAT)
out = (ast_expression*)ast_unary_new(ctx, VINSTR_NEG_F, exprs[0]);
else
out = (ast_expression*)ast_unary_new(ctx, VINSTR_NEG_V, exprs[0]);
break;
case opid2('!','P'):
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
break;
case TYPE_VECTOR:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[0]);
break;
case TYPE_STRING:
if (OPTS_FLAG(TRUE_EMPTY_STRINGS))
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
else
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[0]);
break;
/* we don't constant-fold NOT for these types */
case TYPE_ENTITY:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_ENT, exprs[0]);
break;
case TYPE_FUNCTION:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_FNC, exprs[0]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot logically negate type %s",
type_name[exprs[0]->vtype]);
return false;
}
}
break;
case opid1('+'):
if (exprs[0]->vtype != exprs[1]->vtype ||
(exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT) )
{
compile_error(ctx, "invalid types used in expression: cannot add type %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = fold_binary(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
out = fold_binary(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot add type %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
}
break;
case opid1('-'):
if (exprs[0]->vtype != exprs[1]->vtype ||
(exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT))
{
compile_error(ctx, "invalid types used in expression: cannot subtract type %s from %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = fold_binary(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
out = fold_binary(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot subtract type %s from %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
}
break;
case opid1('*'):
if (exprs[0]->vtype != exprs[1]->vtype &&
!(exprs[0]->vtype == TYPE_VECTOR &&
exprs[1]->vtype == TYPE_FLOAT) &&
!(exprs[1]->vtype == TYPE_VECTOR &&
exprs[0]->vtype == TYPE_FLOAT)
)
{
compile_error(ctx, "invalid types used in expression: cannot multiply types %s and %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
if (exprs[1]->vtype == TYPE_VECTOR)
out = fold_binary(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
else
out = fold_binary(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
if (exprs[1]->vtype == TYPE_FLOAT)
out = fold_binary(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
else
out = fold_binary(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot multiply types %s and %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
}
break;
case opid1('/'):
if (exprs[1]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: cannot divide types %s and %s", ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
if (exprs[0]->vtype == TYPE_FLOAT)
out = fold_binary(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
else {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: cannot divide types %s and %s", ty1, ty2);
return false;
}
}
break;
case opid1('%'):
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform modulo operation between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
} else if (!(out = fold_op(parser->fold, op, exprs))) {
/* generate a call to __builtin_mod */
ast_expression *mod = intrin_func(parser->intrin, "mod");
ast_call *call = NULL;
if (!mod) return false; /* can return null for missing floor */
call = ast_call_new(parser_ctx(parser), mod);
vec_push(call->params, exprs[0]);
vec_push(call->params, exprs[1]);
out = (ast_expression*)call;
}
break;
case opid2('%','='):
compile_error(ctx, "%= is unimplemented");
return false;
case opid1('|'):
case opid1('&'):
case opid1('^'):
if ( !(exprs[0]->vtype == TYPE_FLOAT && exprs[1]->vtype == TYPE_FLOAT) &&
!(exprs[0]->vtype == TYPE_VECTOR && exprs[1]->vtype == TYPE_FLOAT) &&
!(exprs[0]->vtype == TYPE_VECTOR && exprs[1]->vtype == TYPE_VECTOR))
{
compile_error(ctx, "invalid types used in expression: cannot perform bit operations between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
/*
* IF the first expression is float, the following will be too
* since scalar ^ vector is not allowed.
*/
if (exprs[0]->vtype == TYPE_FLOAT) {
out = fold_binary(ctx,
(op->id == opid1('^') ? VINSTR_BITXOR : op->id == opid1('|') ? INSTR_BITOR : INSTR_BITAND),
exprs[0], exprs[1]);
} else {
/*
* The first is a vector: vector is allowed to bitop with vector and
* with scalar, branch here for the second operand.
*/
if (exprs[1]->vtype == TYPE_VECTOR) {
/*
* Bitop all the values of the vector components against the
* vectors components in question.
*/
out = fold_binary(ctx,
(op->id == opid1('^') ? VINSTR_BITXOR_V : op->id == opid1('|') ? VINSTR_BITOR_V : VINSTR_BITAND_V),
exprs[0], exprs[1]);
} else {
out = fold_binary(ctx,
(op->id == opid1('^') ? VINSTR_BITXOR_VF : op->id == opid1('|') ? VINSTR_BITOR_VF : VINSTR_BITAND_VF),
exprs[0], exprs[1]);
}
}
}
break;
case opid2('<','<'):
case opid2('>','>'):
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform shift between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
ast_expression *shift = intrin_func(parser->intrin, (op->id == opid2('<','<')) ? "__builtin_lshift" : "__builtin_rshift");
ast_call *call = ast_call_new(parser_ctx(parser), shift);
vec_push(call->params, exprs[0]);
vec_push(call->params, exprs[1]);
out = (ast_expression*)call;
}
break;
case opid3('<','<','='):
case opid3('>','>','='):
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform shift operation between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if(!(out = fold_op(parser->fold, op, exprs))) {
ast_expression *shift = intrin_func(parser->intrin, (op->id == opid3('<','<','=')) ? "__builtin_lshift" : "__builtin_rshift");
ast_call *call = ast_call_new(parser_ctx(parser), shift);
vec_push(call->params, exprs[0]);
vec_push(call->params, exprs[1]);
out = (ast_expression*)ast_store_new(
parser_ctx(parser),
INSTR_STORE_F,
exprs[0],
(ast_expression*)call
);
}
break;
case opid2('|','|'):
generated_op += 1; /* INSTR_OR */
case opid2('&','&'):
generated_op += INSTR_AND;
if (!(out = fold_op(parser->fold, op, exprs))) {
if (OPTS_FLAG(PERL_LOGIC) && !ast_compare_type(exprs[0], exprs[1])) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types for logical operation with -fperl-logic: %s and %s", ty1, ty2);
return false;
}
for (i = 0; i < 2; ++i) {
if (OPTS_FLAG(CORRECT_LOGIC) && exprs[i]->vtype == TYPE_VECTOR) {
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[i]);
if (!out) break;
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, out);
if (!out) break;
exprs[i] = out; out = NULL;
if (OPTS_FLAG(PERL_LOGIC)) {
/* here we want to keep the right expressions' type */
break;
}
}
else if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && exprs[i]->vtype == TYPE_STRING) {
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[i]);
if (!out) break;
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, out);
if (!out) break;
exprs[i] = out; out = NULL;
if (OPTS_FLAG(PERL_LOGIC)) {
/* here we want to keep the right expressions' type */
break;
}
}
}
out = fold_binary(ctx, generated_op, exprs[0], exprs[1]);
}
break;
case opid2('?',':'):
if (vec_last(sy->paren) != PAREN_TERNARY2) {
compile_error(ctx, "mismatched parenthesis/ternary");
return false;
}
vec_pop(sy->paren);
if (!ast_compare_type(exprs[1], exprs[2])) {
ast_type_to_string(exprs[1], ty1, sizeof(ty1));
ast_type_to_string(exprs[2], ty2, sizeof(ty2));
compile_error(ctx, "operands of ternary expression must have the same type, got %s and %s", ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = (ast_expression*)ast_ternary_new(ctx, exprs[0], exprs[1], exprs[2]);
break;
case opid2('*', '*'):
if (NotSameType(TYPE_FLOAT)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in exponentiation: %s and %s",
ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
ast_call *gencall = ast_call_new(parser_ctx(parser), intrin_func(parser->intrin, "pow"));
vec_push(gencall->params, exprs[0]);
vec_push(gencall->params, exprs[1]);
out = (ast_expression*)gencall;
}
break;
case opid2('>', '<'):
if (NotSameType(TYPE_VECTOR)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in cross product: %s and %s",
ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
out = fold_binary(
parser_ctx(parser),
VINSTR_CROSS,
exprs[0],
exprs[1]
);
}
break;
case opid3('<','=','>'): /* -1, 0, or 1 */
if (NotSameType(TYPE_FLOAT)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in comparision: %s and %s",
ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
/* This whole block is NOT fold_binary safe */
ast_binary *eq = ast_binary_new(ctx, INSTR_EQ_F, exprs[0], exprs[1]);
eq->refs = AST_REF_NONE;
/* if (lt) { */
out = (ast_expression*)ast_ternary_new(ctx,
(ast_expression*)ast_binary_new(ctx, INSTR_LT, exprs[0], exprs[1]),
/* out = -1 */
(ast_expression*)parser->fold->imm_float[2],
/* } else { */
/* if (eq) { */
(ast_expression*)ast_ternary_new(ctx, (ast_expression*)eq,
/* out = 0 */
(ast_expression*)parser->fold->imm_float[0],
/* } else { */
/* out = 1 */
(ast_expression*)parser->fold->imm_float[1]
/* } */
)
/* } */
);
}
break;
case opid1('>'):
generated_op += 1; /* INSTR_GT */
case opid1('<'):
generated_op += 1; /* INSTR_LT */
case opid2('>', '='):
generated_op += 1; /* INSTR_GE */
case opid2('<', '='):
generated_op += INSTR_LE;
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = fold_binary(ctx, generated_op, exprs[0], exprs[1]);
break;
case opid2('!', '='):
if (exprs[0]->vtype != exprs[1]->vtype) {
compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = fold_binary(ctx, type_ne_instr[exprs[0]->vtype], exprs[0], exprs[1]);
break;
case opid2('=', '='):
if (exprs[0]->vtype != exprs[1]->vtype) {
compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = fold_binary(ctx, type_eq_instr[exprs[0]->vtype], exprs[0], exprs[1]);
break;
case opid1('='):
if (ast_istype(exprs[0], ast_entfield)) {
ast_expression *field = ((ast_entfield*)exprs[0])->field;
if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
exprs[0]->vtype == TYPE_FIELD &&
exprs[0]->next->vtype == TYPE_VECTOR)
{
assignop = type_storep_instr[TYPE_VECTOR];
}
else
assignop = type_storep_instr[exprs[0]->vtype];
if (assignop == VINSTR_END || !ast_compare_type(field->next, exprs[1]))
{
ast_type_to_string(field->next, ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
if (OPTS_FLAG(ASSIGN_FUNCTION_TYPES) &&
field->next->vtype == TYPE_FUNCTION &&
exprs[1]->vtype == TYPE_FUNCTION)
{
(void)!compile_warning(ctx, WARN_ASSIGN_FUNCTION_TYPES,
"invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
else
compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
}
else
{
if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
exprs[0]->vtype == TYPE_FIELD &&
exprs[0]->next->vtype == TYPE_VECTOR)
{
assignop = type_store_instr[TYPE_VECTOR];
}
else {
assignop = type_store_instr[exprs[0]->vtype];
}
if (assignop == VINSTR_END) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
else if (!ast_compare_type(exprs[0], exprs[1]))
{
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
if (OPTS_FLAG(ASSIGN_FUNCTION_TYPES) &&
exprs[0]->vtype == TYPE_FUNCTION &&
exprs[1]->vtype == TYPE_FUNCTION)
{
(void)!compile_warning(ctx, WARN_ASSIGN_FUNCTION_TYPES,
"invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
else
compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
}
(void)check_write_to(ctx, exprs[0]);
out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
break;
case opid3('+','+','P'):
case opid3('-','-','P'):
/* prefix ++ */
if (exprs[0]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[0]), "invalid type for prefix increment: %s", ty1);
return false;
}
if (op->id == opid3('+','+','P'))
addop = INSTR_ADD_F;
else
addop = INSTR_SUB_F;
(void)check_write_to(ast_ctx(exprs[0]), exprs[0]);
if (ast_istype(exprs[0], ast_entfield)) {
out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
exprs[0],
(ast_expression*)parser->fold->imm_float[1]);
} else {
out = (ast_expression*)ast_binstore_new(ctx, INSTR_STORE_F, addop,
exprs[0],
(ast_expression*)parser->fold->imm_float[1]);
}
break;
case opid3('S','+','+'):
case opid3('S','-','-'):
/* prefix ++ */
if (exprs[0]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[0]), "invalid type for suffix increment: %s", ty1);
return false;
}
if (op->id == opid3('S','+','+')) {
addop = INSTR_ADD_F;
subop = INSTR_SUB_F;
} else {
addop = INSTR_SUB_F;
subop = INSTR_ADD_F;
}
(void)check_write_to(ast_ctx(exprs[0]), exprs[0]);
if (ast_istype(exprs[0], ast_entfield)) {
out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
exprs[0],
(ast_expression*)parser->fold->imm_float[1]);
} else {
out = (ast_expression*)ast_binstore_new(ctx, INSTR_STORE_F, addop,
exprs[0],
(ast_expression*)parser->fold->imm_float[1]);
}
if (!out)
return false;
out = fold_binary(ctx, subop,
out,
(ast_expression*)parser->fold->imm_float[1]);
break;
case opid2('+','='):
case opid2('-','='):
if (exprs[0]->vtype != exprs[1]->vtype ||
(exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT) )
{
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: cannot add or subtract type %s and %s",
ty1, ty2);
return false;
}
(void)check_write_to(ctx, exprs[0]);
if (ast_istype(exprs[0], ast_entfield))
assignop = type_storep_instr[exprs[0]->vtype];
else
assignop = type_store_instr[exprs[0]->vtype];
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = (ast_expression*)ast_binstore_new(ctx, assignop,
(op->id == opid2('+','=') ? INSTR_ADD_F : INSTR_SUB_F),
exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
out = (ast_expression*)ast_binstore_new(ctx, assignop,
(op->id == opid2('+','=') ? INSTR_ADD_V : INSTR_SUB_V),
exprs[0], exprs[1]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot add or subtract type %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
};
break;
case opid2('*','='):
case opid2('/','='):
if (exprs[1]->vtype != TYPE_FLOAT ||
!(exprs[0]->vtype == TYPE_FLOAT ||
exprs[0]->vtype == TYPE_VECTOR))
{
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: %s and %s",
ty1, ty2);
return false;
}
(void)check_write_to(ctx, exprs[0]);
if (ast_istype(exprs[0], ast_entfield))
assignop = type_storep_instr[exprs[0]->vtype];
else
assignop = type_store_instr[exprs[0]->vtype];
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = (ast_expression*)ast_binstore_new(ctx, assignop,
(op->id == opid2('*','=') ? INSTR_MUL_F : INSTR_DIV_F),
exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
if (op->id == opid2('*','=')) {
out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_MUL_VF,
exprs[0], exprs[1]);
} else {
out = fold_binary(ctx, INSTR_DIV_F,
(ast_expression*)parser->fold->imm_float[1],
exprs[1]);
if (!out) {
compile_error(ctx, "internal error: failed to generate division");
return false;
}
out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_MUL_VF,
exprs[0], out);
}
break;
default:
compile_error(ctx, "invalid types used in expression: cannot add or subtract type %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
};
break;
case opid2('&','='):
case opid2('|','='):
case opid2('^','='):
if (NotSameType(TYPE_FLOAT) && NotSameType(TYPE_VECTOR)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: %s and %s",
ty1, ty2);
return false;
}
(void)check_write_to(ctx, exprs[0]);
if (ast_istype(exprs[0], ast_entfield))
assignop = type_storep_instr[exprs[0]->vtype];
else
assignop = type_store_instr[exprs[0]->vtype];
if (exprs[0]->vtype == TYPE_FLOAT)
out = (ast_expression*)ast_binstore_new(ctx, assignop,
(op->id == opid2('^','=') ? VINSTR_BITXOR : op->id == opid2('&','=') ? INSTR_BITAND : INSTR_BITOR),
exprs[0], exprs[1]);
else
out = (ast_expression*)ast_binstore_new(ctx, assignop,
(op->id == opid2('^','=') ? VINSTR_BITXOR_V : op->id == opid2('&','=') ? VINSTR_BITAND_V : VINSTR_BITOR_V),
exprs[0], exprs[1]);
break;
case opid3('&','~','='):
/* This is like: a &= ~(b);
* But QC has no bitwise-not, so we implement it as
* a -= a & (b);
*/
if (NotSameType(TYPE_FLOAT) && NotSameType(TYPE_VECTOR)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: %s and %s",
ty1, ty2);
return false;
}
if (ast_istype(exprs[0], ast_entfield))
assignop = type_storep_instr[exprs[0]->vtype];
else
assignop = type_store_instr[exprs[0]->vtype];
if (exprs[0]->vtype == TYPE_FLOAT)
out = fold_binary(ctx, INSTR_BITAND, exprs[0], exprs[1]);
else
out = fold_binary(ctx, VINSTR_BITAND_V, exprs[0], exprs[1]);
if (!out)
return false;
(void)check_write_to(ctx, exprs[0]);
if (exprs[0]->vtype == TYPE_FLOAT)
asbinstore = ast_binstore_new(ctx, assignop, INSTR_SUB_F, exprs[0], out);
else
asbinstore = ast_binstore_new(ctx, assignop, INSTR_SUB_V, exprs[0], out);
asbinstore->keep_dest = true;
out = (ast_expression*)asbinstore;
break;
case opid2('~', 'P'):
if (exprs[0]->vtype != TYPE_FLOAT && exprs[0]->vtype != TYPE_VECTOR) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[0]), "invalid type for bit not: %s", ty1);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
if (exprs[0]->vtype == TYPE_FLOAT) {
out = fold_binary(ctx, INSTR_SUB_F, (ast_expression*)parser->fold->imm_float[2], exprs[0]);
} else {
out = fold_binary(ctx, INSTR_SUB_V, (ast_expression*)parser->fold->imm_vector[1], exprs[0]);
}
}
break;
}
#undef NotSameType
if (!out) {
compile_error(ctx, "failed to apply operator %s", op->op);
return false;
}
vec_push(sy->out, syexp(ctx, out));
return true;
}
static bool parser_close_call(parser_t *parser, shunt *sy)
{
/* was a function call */
ast_expression *fun;
ast_value *funval = NULL;
ast_call *call;
size_t fid;
size_t paramcount, i;
bool fold = true;
fid = vec_last(sy->ops).off;
vec_shrinkby(sy->ops, 1);
/* out[fid] is the function
* everything above is parameters...
*/
if (!vec_size(sy->argc)) {
parseerror(parser, "internal error: no argument counter available");
return false;
}
paramcount = vec_last(sy->argc);
vec_pop(sy->argc);
if (vec_size(sy->out) < fid) {
parseerror(parser, "internal error: broken function call%lu < %lu+%lu\n",
(unsigned long)vec_size(sy->out),
(unsigned long)fid,
(unsigned long)paramcount);
return false;
}
/*
* TODO handle this at the intrinsic level with an ast_intrinsic
* node and codegen.
*/
if ((fun = sy->out[fid].out) == intrin_debug_typestring(parser->intrin)) {
char ty[1024];
if (fid+2 != vec_size(sy->out) ||
vec_last(sy->out).block)
{
parseerror(parser, "intrinsic __builtin_debug_typestring requires exactly 1 parameter");
return false;
}
ast_type_to_string(vec_last(sy->out).out, ty, sizeof(ty));
ast_unref(vec_last(sy->out).out);
sy->out[fid] = syexp(ast_ctx(vec_last(sy->out).out),
(ast_expression*)fold_constgen_string(parser->fold, ty, false));
vec_shrinkby(sy->out, 1);
return true;
}
/*
* Now we need to determine if the function that is being called is
* an intrinsic so we can evaluate if the arguments to it are constant
* and than fruitfully fold them.
*/
#define fold_can_1(X) \
(ast_istype(((ast_expression*)(X)), ast_value) && (X)->hasvalue && ((X)->cvq == CV_CONST) && \
((ast_expression*)(X))->vtype != TYPE_FUNCTION)
if (fid + 1 < vec_size(sy->out))
++paramcount;
for (i = 0; i < paramcount; ++i) {
if (!fold_can_1((ast_value*)sy->out[fid + 1 + i].out)) {
fold = false;
break;
}
}
/*
* All is well which ends well, if we make it into here we can ignore the
* intrinsic call and just evaluate it i.e constant fold it.
*/
if (fold && ast_istype(fun, ast_value) && ((ast_value*)fun)->intrinsic) {
ast_expression **exprs = NULL;
ast_expression *foldval = NULL;
for (i = 0; i < paramcount; i++)
vec_push(exprs, sy->out[fid+1 + i].out);
if (!(foldval = intrin_fold(parser->intrin, (ast_value*)fun, exprs))) {
vec_free(exprs);
goto fold_leave;
}
/*
* Blub: what sorts of unreffing and resizing of
* sy->out should I be doing here?
*/
sy->out[fid] = syexp(foldval->node.context, foldval);
vec_shrinkby(sy->out, paramcount);
vec_free(exprs);
return true;
}
fold_leave:
call = ast_call_new(sy->ops[vec_size(sy->ops)].ctx, fun);
if (!call)
return false;
if (fid+1 + paramcount != vec_size(sy->out)) {
parseerror(parser, "internal error: parameter count mismatch: (%lu+1+%lu), %lu",
(unsigned long)fid, (unsigned long)paramcount, (unsigned long)vec_size(sy->out));
return false;
}
for (i = 0; i < paramcount; ++i)
vec_push(call->params, sy->out[fid+1 + i].out);
vec_shrinkby(sy->out, paramcount);
(void)!ast_call_check_types(call, parser->function->vtype->expression.varparam);
if (parser->max_param_count < paramcount)
parser->max_param_count = paramcount;
if (ast_istype(fun, ast_value)) {
funval = (ast_value*)fun;
if ((fun->flags & AST_FLAG_VARIADIC) &&
!(/*funval->cvq == CV_CONST && */ funval->hasvalue && funval->constval.vfunc->builtin))
{
call->va_count = (ast_expression*)fold_constgen_float(parser->fold, (qcfloat_t)paramcount);
}
}
/* overwrite fid, the function, with a call */
sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);
if (fun->vtype != TYPE_FUNCTION) {
parseerror(parser, "not a function (%s)", type_name[fun->vtype]);
return false;
}
if (!fun->next) {
parseerror(parser, "could not determine function return type");
return false;
} else {
ast_value *fval = (ast_istype(fun, ast_value) ? ((ast_value*)fun) : NULL);
if (fun->flags & AST_FLAG_DEPRECATED) {
if (!fval) {
return !parsewarning(parser, WARN_DEPRECATED,
"call to function (which is marked deprecated)\n",
"-> it has been declared here: %s:%i",
ast_ctx(fun).file, ast_ctx(fun).line);
}
if (!fval->desc) {
return !parsewarning(parser, WARN_DEPRECATED,
"call to `%s` (which is marked deprecated)\n"
"-> `%s` declared here: %s:%i",
fval->name, fval->name, ast_ctx(fun).file, ast_ctx(fun).line);
}
return !parsewarning(parser, WARN_DEPRECATED,
"call to `%s` (deprecated: %s)\n"
"-> `%s` declared here: %s:%i",
fval->name, fval->desc, fval->name, ast_ctx(fun).file,
ast_ctx(fun).line);
}
if (vec_size(fun->params) != paramcount &&
!((fun->flags & AST_FLAG_VARIADIC) &&
vec_size(fun->params) < paramcount))
{
const char *fewmany = (vec_size(fun->params) > paramcount) ? "few" : "many";
if (fval)
return !parsewarning(parser, WARN_INVALID_PARAMETER_COUNT,
"too %s parameters for call to %s: expected %i, got %i\n"
" -> `%s` has been declared here: %s:%i",
fewmany, fval->name, (int)vec_size(fun->params), (int)paramcount,
fval->name, ast_ctx(fun).file, (int)ast_ctx(fun).line);
else
return !parsewarning(parser, WARN_INVALID_PARAMETER_COUNT,
"too %s parameters for function call: expected %i, got %i\n"
" -> it has been declared here: %s:%i",
fewmany, (int)vec_size(fun->params), (int)paramcount,
ast_ctx(fun).file, (int)ast_ctx(fun).line);
}
}
return true;
}
static bool parser_close_paren(parser_t *parser, shunt *sy)
{
if (!vec_size(sy->ops)) {
parseerror(parser, "unmatched closing paren");
return false;
}
while (vec_size(sy->ops)) {
if (vec_last(sy->ops).isparen) {
if (vec_last(sy->paren) == PAREN_FUNC) {
vec_pop(sy->paren);
if (!parser_close_call(parser, sy))
return false;
break;
}
if (vec_last(sy->paren) == PAREN_EXPR) {
vec_pop(sy->paren);
if (!vec_size(sy->out)) {
compile_error(vec_last(sy->ops).ctx, "empty paren expression");
vec_shrinkby(sy->ops, 1);
return false;
}
vec_shrinkby(sy->ops, 1);
break;
}
if (vec_last(sy->paren) == PAREN_INDEX) {
vec_pop(sy->paren);
/* pop off the parenthesis */
vec_shrinkby(sy->ops, 1);
/* then apply the index operator */
if (!parser_sy_apply_operator(parser, sy))
return false;
break;
}
if (vec_last(sy->paren) == PAREN_TERNARY1) {
vec_last(sy->paren) = PAREN_TERNARY2;
/* pop off the parenthesis */
vec_shrinkby(sy->ops, 1);
break;
}
compile_error(vec_last(sy->ops).ctx, "invalid parenthesis");
return false;
}
if (!parser_sy_apply_operator(parser, sy))
return false;
}
return true;
}
static void parser_reclassify_token(parser_t *parser)
{
size_t i;
if (parser->tok >= TOKEN_START)
return;
for (i = 0; i < operator_count; ++i) {
if (!strcmp(parser_tokval(parser), operators[i].op)) {
parser->tok = TOKEN_OPERATOR;
return;
}
}
}
static ast_expression* parse_vararg_do(parser_t *parser)
{
ast_expression *idx, *out;
ast_value *typevar;
ast_value *funtype = parser->function->vtype;
lex_ctx_t ctx = parser_ctx(parser);
if (!parser->function->varargs) {
parseerror(parser, "function has no variable argument list");
return NULL;
}
if (!parser_next(parser) || parser->tok != '(') {
parseerror(parser, "expected parameter index and type in parenthesis");
return NULL;
}
if (!parser_next(parser)) {
parseerror(parser, "error parsing parameter index");
return NULL;
}
idx = parse_expression_leave(parser, true, false, false);
if (!idx)
return NULL;
if (parser->tok != ',') {
if (parser->tok != ')') {
ast_unref(idx);
parseerror(parser, "expected comma after parameter index");
return NULL;
}
/* vararg piping: ...(start) */
out = (ast_expression*)ast_argpipe_new(ctx, idx);
return out;
}
if (!parser_next(parser) || (parser->tok != TOKEN_IDENT && parser->tok != TOKEN_TYPENAME)) {
ast_unref(idx);
parseerror(parser, "expected typename for vararg");
return NULL;
}
typevar = parse_typename(parser, NULL, NULL, NULL);
if (!typevar) {
ast_unref(idx);
return NULL;
}
if (parser->tok != ')') {
ast_unref(idx);
ast_delete(typevar);
parseerror(parser, "expected closing paren");
return NULL;
}
if (funtype->expression.varparam &&
!ast_compare_type((ast_expression*)typevar, (ast_expression*)funtype->expression.varparam))
{
char ty1[1024];
char ty2[1024];
ast_type_to_string((ast_expression*)typevar, ty1, sizeof(ty1));
ast_type_to_string((ast_expression*)funtype->expression.varparam, ty2, sizeof(ty2));
compile_error(ast_ctx(typevar),
"function was declared to take varargs of type `%s`, requested type is: %s",
ty2, ty1);
}
out = (ast_expression*)ast_array_index_new(ctx, (ast_expression*)(parser->function->varargs), idx);
ast_type_adopt(out, typevar);
ast_delete(typevar);
return out;
}
static ast_expression* parse_vararg(parser_t *parser)
{
bool old_noops = parser->lex->flags.noops;
ast_expression *out;
parser->lex->flags.noops = true;
out = parse_vararg_do(parser);
parser->lex->flags.noops = old_noops;
return out;
}
/* not to be exposed */
bool ftepp_predef_exists(const char *name);
static bool parse_sya_operand(parser_t *parser, shunt *sy, bool with_labels)
{
if (OPTS_FLAG(TRANSLATABLE_STRINGS) &&
parser->tok == TOKEN_IDENT &&
!strcmp(parser_tokval(parser), "_"))
{
/* a translatable string */
ast_value *val;
parser->lex->flags.noops = true;
if (!parser_next(parser) || parser->tok != '(') {
parseerror(parser, "use _(\"string\") to create a translatable string constant");
return false;
}
parser->lex->flags.noops = false;
if (!parser_next(parser) || parser->tok != TOKEN_STRINGCONST) {
parseerror(parser, "expected a constant string in translatable-string extension");
return false;
}
val = (ast_value*)fold_constgen_string(parser->fold, parser_tokval(parser), true);
if (!val)
return false;
vec_push(sy->out, syexp(parser_ctx(parser), (ast_expression*)val));
if (!parser_next(parser) || parser->tok != ')') {
parseerror(parser, "expected closing paren after translatable string");
return false;
}
return true;
}
else if (parser->tok == TOKEN_DOTS)
{
ast_expression *va;
if (!OPTS_FLAG(VARIADIC_ARGS)) {
parseerror(parser, "cannot access varargs (try -fvariadic-args)");
return false;
}
va = parse_vararg(parser);
if (!va)
return false;
vec_push(sy->out, syexp(parser_ctx(parser), va));
return true;
}
else if (parser->tok == TOKEN_FLOATCONST) {
ast_expression *val = fold_constgen_float(parser->fold, (parser_token(parser)->constval.f));
if (!val)
return false;
vec_push(sy->out, syexp(parser_ctx(parser), val));
return true;
}
else if (parser->tok == TOKEN_INTCONST || parser->tok == TOKEN_CHARCONST) {
ast_expression *val = fold_constgen_float(parser->fold, (qcfloat_t)(parser_token(parser)->constval.i));
if (!val)
return false;
vec_push(sy->out, syexp(parser_ctx(parser), val));
return true;
}
else if (parser->tok == TOKEN_STRINGCONST) {
ast_expression *val = fold_constgen_string(parser->fold, parser_tokval(parser), false);
if (!val)
return false;
vec_push(sy->out, syexp(parser_ctx(parser), val));
return true;
}
else if (parser->tok == TOKEN_VECTORCONST) {
ast_expression *val = fold_constgen_vector(parser->fold, parser_token(parser)->constval.v);
if (!val)
return false;
vec_push(sy->out, syexp(parser_ctx(parser), val));
return true;
}
else if (parser->tok == TOKEN_IDENT)
{
const char *ctoken = parser_tokval(parser);
ast_expression *prev = vec_size(sy->out) ? vec_last(sy->out).out : NULL;
ast_expression *var;
/* a_vector.{x,y,z} */
if (!vec_size(sy->ops) ||
!vec_last(sy->ops).etype ||
operators[vec_last(sy->ops).etype-1].id != opid1('.'))
{
/* When adding more intrinsics, fix the above condition */
prev = NULL;
}
if (prev && prev->vtype == TYPE_VECTOR && ctoken[0] >= 'x' && ctoken[0] <= 'z' && !ctoken[1])
{
var = (ast_expression*)parser->const_vec[ctoken[0]-'x'];
} else {
var = parser_find_var(parser, parser_tokval(parser));
if (!var)
var = parser_find_field(parser, parser_tokval(parser));
}
if (!var && with_labels) {
var = (ast_expression*)parser_find_label(parser, parser_tokval(parser));
if (!with_labels) {
ast_label *lbl = ast_label_new(parser_ctx(parser), parser_tokval(parser), true);
var = (ast_expression*)lbl;
vec_push(parser->labels, lbl);
}
}
if (!var && !strcmp(parser_tokval(parser), "__FUNC__"))
var = (ast_expression*)fold_constgen_string(parser->fold, parser->function->name, false);
if (!var) {
/*
* now we try for the real intrinsic hashtable. If the string
* begins with __builtin, we simply skip past it, otherwise we
* use the identifier as is.
*/
if (!strncmp(parser_tokval(parser), "__builtin_", 10)) {
var = intrin_func(parser->intrin, parser_tokval(parser));
}
/*
* Try it again, intrin_func deals with the alias method as well
* the first one masks for __builtin though, we emit warning here.
*/
if (!var) {
if ((var = intrin_func(parser->intrin, parser_tokval(parser)))) {
(void)!compile_warning(
parser_ctx(parser),
WARN_BUILTINS,
"using implicitly defined builtin `__builtin_%s' for `%s'",
parser_tokval(parser),
parser_tokval(parser)
);
}
}
if (!var) {
char *correct = NULL;
size_t i;
/*
* sometimes people use preprocessing predefs without enabling them
* i've done this thousands of times already myself. Lets check for
* it in the predef table. And diagnose it better :)
*/
if (!OPTS_FLAG(FTEPP_PREDEFS) && ftepp_predef_exists(parser_tokval(parser))) {
parseerror(parser, "unexpected identifier: %s (use -fftepp-predef to enable pre-defined macros)", parser_tokval(parser));
return false;
}
/*
* TODO: determine the best score for the identifier: be it
* a variable, a field.
*
* We should also consider adding correction tables for
* other things as well.
*/
if (OPTS_OPTION_BOOL(OPTION_CORRECTION) && strlen(parser_tokval(parser)) <= 16) {
correction_t corr;
correct_init(&corr);
for (i = 0; i < vec_size(parser->correct_variables); i++) {
correct = correct_str(&corr, parser->correct_variables[i], parser_tokval(parser));
if (strcmp(correct, parser_tokval(parser))) {
break;
} else {
mem_d(correct);
correct = NULL;
}
}
correct_free(&corr);
if (correct) {
parseerror(parser, "unexpected identifier: %s (did you mean %s?)", parser_tokval(parser), correct);
mem_d(correct);
return false;
}
}
parseerror(parser, "unexpected identifier: %s", parser_tokval(parser));
return false;
}
}
else
{
if (ast_istype(var, ast_value)) {
((ast_value*)var)->uses++;
}
else if (ast_istype(var, ast_member)) {
ast_member *mem = (ast_member*)var;
if (ast_istype(mem->owner, ast_value))
((ast_value*)(mem->owner))->uses++;
}
}
vec_push(sy->out, syexp(parser_ctx(parser), var));
return true;
}
parseerror(parser, "unexpected token `%s`", parser_tokval(parser));
return false;
}
static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma, bool truthvalue, bool with_labels)
{
ast_expression *expr = NULL;
shunt sy;
size_t i;
bool wantop = false;
/* only warn once about an assignment in a truth value because the current code
* would trigger twice on: if(a = b && ...), once for the if-truth-value, once for the && part
*/
bool warn_parenthesis = true;
/* count the parens because an if starts with one, so the
* end of a condition is an unmatched closing paren
*/
int ternaries = 0;
memset(&sy, 0, sizeof(sy));
parser->lex->flags.noops = false;
parser_reclassify_token(parser);
while (true)
{
if (parser->tok == TOKEN_TYPENAME) {
parseerror(parser, "unexpected typename `%s`", parser_tokval(parser));
goto onerr;
}
if (parser->tok == TOKEN_OPERATOR)
{
/* classify the operator */
const oper_info *op;
const oper_info *olast = NULL;
size_t o;
for (o = 0; o < operator_count; ++o) {
if (((!(operators[o].flags & OP_PREFIX) == !!wantop)) &&
/* !(operators[o].flags & OP_SUFFIX) && / * remove this */
!strcmp(parser_tokval(parser), operators[o].op))
{
break;
}
}
if (o == operator_count) {
compile_error(parser_ctx(parser), "unexpected operator: %s", parser_tokval(parser));
goto onerr;
}
/* found an operator */
op = &operators[o];
/* when declaring variables, a comma starts a new variable */
if (op->id == opid1(',') && !vec_size(sy.paren) && stopatcomma) {
/* fixup the token */
parser->tok = ',';
break;
}
/* a colon without a pervious question mark cannot be a ternary */
if (!ternaries && op->id == opid2(':','?')) {
parser->tok = ':';
break;
}
if (op->id == opid1(',')) {
if (vec_size(sy.paren) && vec_last(sy.paren) == PAREN_TERNARY2) {
(void)!parsewarning(parser, WARN_TERNARY_PRECEDENCE, "suggesting parenthesis around ternary expression");
}
}
if (vec_size(sy.ops) && !vec_last(sy.ops).isparen)
olast = &operators[vec_last(sy.ops).etype-1];
/* first only apply higher precedences, assoc_left+equal comes after we warn about precedence rules */
while (olast && op->prec < olast->prec)
{
if (!parser_sy_apply_operator(parser, &sy))
goto onerr;
if (vec_size(sy.ops) && !vec_last(sy.ops).isparen)
olast = &operators[vec_last(sy.ops).etype-1];
else
olast = NULL;
}
#define IsAssignOp(x) (\
(x) == opid1('=') || \
(x) == opid2('+','=') || \
(x) == opid2('-','=') || \
(x) == opid2('*','=') || \
(x) == opid2('/','=') || \
(x) == opid2('%','=') || \
(x) == opid2('&','=') || \
(x) == opid2('|','=') || \
(x) == opid3('&','~','=') \
)
if (warn_parenthesis) {
if ( (olast && IsAssignOp(olast->id) && (op->id == opid2('&','&') || op->id == opid2('|','|'))) ||
(olast && IsAssignOp(op->id) && (olast->id == opid2('&','&') || olast->id == opid2('|','|'))) ||
(truthvalue && !vec_size(sy.paren) && IsAssignOp(op->id))
)
{
(void)!parsewarning(parser, WARN_PARENTHESIS, "suggesting parenthesis around assignment used as truth value");
warn_parenthesis = false;
}
if (olast && olast->id != op->id) {
if ((op->id == opid1('&') || op->id == opid1('|') || op->id == opid1('^')) &&
(olast->id == opid1('&') || olast->id == opid1('|') || olast->id == opid1('^')))
{
(void)!parsewarning(parser, WARN_PARENTHESIS, "suggesting parenthesis around bitwise operations");
warn_parenthesis = false;
}
else if ((op->id == opid2('&','&') || op->id == opid2('|','|')) &&
(olast->id == opid2('&','&') || olast->id == opid2('|','|')))
{
(void)!parsewarning(parser, WARN_PARENTHESIS, "suggesting parenthesis around logical operations");
warn_parenthesis = false;
}
}
}
while (olast && (
(op->prec < olast->prec) ||
(op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
{
if (!parser_sy_apply_operator(parser, &sy))
goto onerr;
if (vec_size(sy.ops) && !vec_last(sy.ops).isparen)
olast = &operators[vec_last(sy.ops).etype-1];
else
olast = NULL;
}
if (op->id == opid1('(')) {
if (wantop) {
size_t sycount = vec_size(sy.out);
/* we expected an operator, this is the function-call operator */
vec_push(sy.paren, PAREN_FUNC);
vec_push(sy.ops, syparen(parser_ctx(parser), sycount-1));
vec_push(sy.argc, 0);
} else {
vec_push(sy.paren, PAREN_EXPR);
vec_push(sy.ops, syparen(parser_ctx(parser), 0));
}
wantop = false;
} else if (op->id == opid1('[')) {
if (!wantop) {
parseerror(parser, "unexpected array subscript");
goto onerr;
}
vec_push(sy.paren, PAREN_INDEX);
/* push both the operator and the paren, this makes life easier */
vec_push(sy.ops, syop(parser_ctx(parser), op));
vec_push(sy.ops, syparen(parser_ctx(parser), 0));
wantop = false;
} else if (op->id == opid2('?',':')) {
vec_push(sy.ops, syop(parser_ctx(parser), op));
vec_push(sy.ops, syparen(parser_ctx(parser), 0));
wantop = false;
++ternaries;
vec_push(sy.paren, PAREN_TERNARY1);
} else if (op->id == opid2(':','?')) {
if (!vec_size(sy.paren)) {
parseerror(parser, "unexpected colon outside ternary expression (missing parenthesis?)");
goto onerr;
}
if (vec_last(sy.paren) != PAREN_TERNARY1) {
parseerror(parser, "unexpected colon outside ternary expression (missing parenthesis?)");
goto onerr;
}
if (!parser_close_paren(parser, &sy))
goto onerr;
vec_push(sy.ops, syop(parser_ctx(parser), op));
wantop = false;
--ternaries;
} else {
vec_push(sy.ops, syop(parser_ctx(parser), op));
wantop = !!(op->flags & OP_SUFFIX);
}
}
else if (parser->tok == ')') {
while (vec_size(sy.paren) && vec_last(sy.paren) == PAREN_TERNARY2) {
if (!parser_sy_apply_operator(parser, &sy))
goto onerr;
}
if (!vec_size(sy.paren))
break;
if (wantop) {
if (vec_last(sy.paren) == PAREN_TERNARY1) {
parseerror(parser, "mismatched parentheses (closing paren in ternary expression?)");
goto onerr;
}
if (!parser_close_paren(parser, &sy))
goto onerr;
} else {
/* must be a function call without parameters */
if (vec_last(sy.paren) != PAREN_FUNC) {
parseerror(parser, "closing paren in invalid position");
goto onerr;
}
if (!parser_close_paren(parser, &sy))
goto onerr;
}
wantop = true;
}
else if (parser->tok == '(') {
parseerror(parser, "internal error: '(' should be classified as operator");
goto onerr;
}
else if (parser->tok == '[') {
parseerror(parser, "internal error: '[' should be classified as operator");
goto onerr;
}
else if (parser->tok == ']') {
while (vec_size(sy.paren) && vec_last(sy.paren) == PAREN_TERNARY2) {
if (!parser_sy_apply_operator(parser, &sy))
goto onerr;
}
if (!vec_size(sy.paren))
break;
if (vec_last(sy.paren) != PAREN_INDEX) {
parseerror(parser, "mismatched parentheses, unexpected ']'");
goto onerr;
}
if (!parser_close_paren(parser, &sy))
goto onerr;
wantop = true;
}
else if (!wantop) {
if (!parse_sya_operand(parser, &sy, with_labels))
goto onerr;
#if 0
if (vec_size(sy.paren) && vec_last(sy.ops).isparen && vec_last(sy.paren) == PAREN_FUNC)
vec_last(sy.argc)++;
#endif
wantop = true;
}
else {
/* in this case we might want to allow constant string concatenation */
bool concatenated = false;
if (parser->tok == TOKEN_STRINGCONST && vec_size(sy.out)) {
ast_expression *lexpr = vec_last(sy.out).out;
if (ast_istype(lexpr, ast_value)) {
ast_value *last = (ast_value*)lexpr;
if (last->isimm == true && last->cvq == CV_CONST &&
last->hasvalue && last->expression.vtype == TYPE_STRING)
{
char *newstr = NULL;
util_asprintf(&newstr, "%s%s", last->constval.vstring, parser_tokval(parser));
vec_last(sy.out).out = (ast_expression*)fold_constgen_string(parser->fold, newstr, false);
mem_d(newstr);
concatenated = true;
}
}
}
if (!concatenated) {
parseerror(parser, "expected operator or end of statement");
goto onerr;
}
}
if (!parser_next(parser)) {
goto onerr;
}
if (parser->tok == ';' ||
((!vec_size(sy.paren) || (vec_size(sy.paren) == 1 && vec_last(sy.paren) == PAREN_TERNARY2)) &&
(parser->tok == ']' || parser->tok == ')' || parser->tok == '}')))
{
break;
}
}
while (vec_size(sy.ops)) {
if (!parser_sy_apply_operator(parser, &sy))
goto onerr;
}
parser->lex->flags.noops = true;
if (vec_size(sy.out) != 1) {
parseerror(parser, "expression expected");
expr = NULL;
} else
expr = sy.out[0].out;
vec_free(sy.out);
vec_free(sy.ops);
if (vec_size(sy.paren)) {
parseerror(parser, "internal error: vec_size(sy.paren) = %lu", (unsigned long)vec_size(sy.paren));
return NULL;
}
vec_free(sy.paren);
vec_free(sy.argc);
return expr;
onerr:
parser->lex->flags.noops = true;
for (i = 0; i < vec_size(sy.out); ++i) {
if (sy.out[i].out)
ast_unref(sy.out[i].out);
}
vec_free(sy.out);
vec_free(sy.ops);
vec_free(sy.paren);
vec_free(sy.argc);
return NULL;
}
static ast_expression* parse_expression(parser_t *parser, bool stopatcomma, bool with_labels)
{
ast_expression *e = parse_expression_leave(parser, stopatcomma, false, with_labels);
if (!e)
return NULL;
if (parser->tok != ';') {
parseerror(parser, "semicolon expected after expression");
ast_unref(e);
return NULL;
}
if (!parser_next(parser)) {
ast_unref(e);
return NULL;
}
return e;
}
static void parser_enterblock(parser_t *parser)
{
vec_push(parser->variables, util_htnew(PARSER_HT_SIZE));
vec_push(parser->_blocklocals, vec_size(parser->_locals));
vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
vec_push(parser->_blocktypedefs, vec_size(parser->_typedefs));
vec_push(parser->_block_ctx, parser_ctx(parser));
/* corrector */
vec_push(parser->correct_variables, correct_trie_new());
vec_push(parser->correct_variables_score, NULL);
}
static bool parser_leaveblock(parser_t *parser)
{
bool rv = true;
size_t locals, typedefs;
if (vec_size(parser->variables) <= PARSER_HT_LOCALS) {
parseerror(parser, "internal error: parser_leaveblock with no block");
return false;
}
util_htdel(vec_last(parser->variables));
correct_del(vec_last(parser->correct_variables), vec_last(parser->correct_variables_score));
vec_pop(parser->variables);
vec_pop(parser->correct_variables);
vec_pop(parser->correct_variables_score);
if (!vec_size(parser->_blocklocals)) {
parseerror(parser, "internal error: parser_leaveblock with no block (2)");
return false;
}
locals = vec_last(parser->_blocklocals);
vec_pop(parser->_blocklocals);
while (vec_size(parser->_locals) != locals) {
ast_expression *e = vec_last(parser->_locals);
ast_value *v = (ast_value*)e;
vec_pop(parser->_locals);
if (ast_istype(e, ast_value) && !v->uses) {
if (compile_warning(ast_ctx(v), WARN_UNUSED_VARIABLE, "unused variable: `%s`", v->name))
rv = false;
}
}
typedefs = vec_last(parser->_blocktypedefs);
while (vec_size(parser->_typedefs) != typedefs) {
ast_delete(vec_last(parser->_typedefs));
vec_pop(parser->_typedefs);
}
util_htdel(vec_last(parser->typedefs));
vec_pop(parser->typedefs);
vec_pop(parser->_block_ctx);
return rv;
}
static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e)
{
vec_push(parser->_locals, e);
util_htset(vec_last(parser->variables), name, (void*)e);
/* corrector */
correct_add (
vec_last(parser->correct_variables),
&vec_last(parser->correct_variables_score),
name
);
}
static void parser_addglobal(parser_t *parser, const char *name, ast_expression *e)
{
vec_push(parser->globals, e);
util_htset(parser->htglobals, name, e);
/* corrector */
correct_add (
parser->correct_variables[0],
&parser->correct_variables_score[0],
name
);
}
static ast_expression* process_condition(parser_t *parser, ast_expression *cond, bool *_ifnot)
{
bool ifnot = false;
ast_unary *unary;
ast_expression *prev;
if (cond->vtype == TYPE_VOID || cond->vtype >= TYPE_VARIANT) {
char ty[1024];
ast_type_to_string(cond, ty, sizeof(ty));
compile_error(ast_ctx(cond), "invalid type for if() condition: %s", ty);
}
if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && cond->vtype == TYPE_STRING)
{
prev = cond;
cond = (ast_expression*)ast_unary_new(ast_ctx(cond), INSTR_NOT_S, cond);
if (!cond) {
ast_unref(prev);
parseerror(parser, "internal error: failed to process condition");
return NULL;
}
ifnot = !ifnot;
}
else if (OPTS_FLAG(CORRECT_LOGIC) && cond->vtype == TYPE_VECTOR)
{
/* vector types need to be cast to true booleans */
ast_binary *bin = (ast_binary*)cond;
if (!OPTS_FLAG(PERL_LOGIC) || !ast_istype(cond, ast_binary) || !(bin->op == INSTR_AND || bin->op == INSTR_OR))
{
/* in perl-logic, AND and OR take care of the -fcorrect-logic */
prev = cond;
cond = (ast_expression*)ast_unary_new(ast_ctx(cond), INSTR_NOT_V, cond);
if (!cond) {
ast_unref(prev);
parseerror(parser, "internal error: failed to process condition");
return NULL;
}
ifnot = !ifnot;
}
}
unary = (ast_unary*)cond;
/* ast_istype dereferences cond, should test here for safety */
while (cond && ast_istype(cond, ast_unary) && unary->op == INSTR_NOT_F)
{
cond = unary->operand;
unary->operand = NULL;
ast_delete(unary);
ifnot = !ifnot;
unary = (ast_unary*)cond;
}
if (!cond)
parseerror(parser, "internal error: failed to process condition");
if (ifnot) *_ifnot = !*_ifnot;
return cond;
}
static bool parse_if(parser_t *parser, ast_block *block, ast_expression **out)
{
ast_ifthen *ifthen;
ast_expression *cond, *ontrue = NULL, *onfalse = NULL;
bool ifnot = false;
lex_ctx_t ctx = parser_ctx(parser);
(void)block; /* not touching */
/* skip the 'if', parse an optional 'not' and check for an opening paren */
if (!parser_next(parser)) {
parseerror(parser, "expected condition or 'not'");
return false;
}
if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "not")) {
ifnot = true;
if (!parser_next(parser)) {
parseerror(parser, "expected condition in parenthesis");
return false;
}
}
if (parser->tok != '(') {
parseerror(parser, "expected 'if' condition in parenthesis");
return false;
}
/* parse into the expression */
if (!parser_next(parser)) {
parseerror(parser, "expected 'if' condition after opening paren");
return false;
}
/* parse the condition */
cond = parse_expression_leave(parser, false, true, false);
if (!cond)
return false;
/* closing paren */
if (parser->tok != ')') {
parseerror(parser, "expected closing paren after 'if' condition");
ast_unref(cond);
return false;
}
/* parse into the 'then' branch */
if (!parser_next(parser)) {
parseerror(parser, "expected statement for on-true branch of 'if'");
ast_unref(cond);
return false;
}
if (!parse_statement_or_block(parser, &ontrue)) {
ast_unref(cond);
return false;
}
if (!ontrue)
ontrue = (ast_expression*)ast_block_new(parser_ctx(parser));
/* check for an else */
if (!strcmp(parser_tokval(parser), "else")) {
/* parse into the 'else' branch */
if (!parser_next(parser)) {
parseerror(parser, "expected on-false branch after 'else'");
ast_delete(ontrue);
ast_unref(cond);
return false;
}
if (!parse_statement_or_block(parser, &onfalse)) {
ast_delete(ontrue);
ast_unref(cond);
return false;
}
}
cond = process_condition(parser, cond, &ifnot);
if (!cond) {
if (ontrue) ast_delete(ontrue);
if (onfalse) ast_delete(onfalse);
return false;
}
if (ifnot)
ifthen = ast_ifthen_new(ctx, cond, onfalse, ontrue);
else
ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
*out = (ast_expression*)ifthen;
return true;
}
static bool parse_while_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_while(parser_t *parser, ast_block *block, ast_expression **out)
{
bool rv;
char *label = NULL;
/* skip the 'while' and get the body */
if (!parser_next(parser)) {
if (OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "expected loop label or 'while' condition in parenthesis");
else
parseerror(parser, "expected 'while' condition in parenthesis");
return false;
}
if (parser->tok == ':') {
if (!OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "labeled loops not activated, try using -floop-labels");
if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected loop label");
return false;
}
label = util_strdup(parser_tokval(parser));
if (!parser_next(parser)) {
mem_d(label);
parseerror(parser, "expected 'while' condition in parenthesis");
return false;
}
}
if (parser->tok != '(') {
parseerror(parser, "expected 'while' condition in parenthesis");
return false;
}
vec_push(parser->breaks, label);
vec_push(parser->continues, label);
rv = parse_while_go(parser, block, out);
if (label)
mem_d(label);
if (vec_last(parser->breaks) != label || vec_last(parser->continues) != label) {
parseerror(parser, "internal error: label stack corrupted");
rv = false;
ast_delete(*out);
*out = NULL;
}
else {
vec_pop(parser->breaks);
vec_pop(parser->continues);
}
return rv;
}
static bool parse_while_go(parser_t *parser, ast_block *block, ast_expression **out)
{
ast_loop *aloop;
ast_expression *cond, *ontrue;
bool ifnot = false;
lex_ctx_t ctx = parser_ctx(parser);
(void)block; /* not touching */
/* parse into the expression */
if (!parser_next(parser)) {
parseerror(parser, "expected 'while' condition after opening paren");
return false;
}
/* parse the condition */
cond = parse_expression_leave(parser, false, true, false);
if (!cond)
return false;
/* closing paren */
if (parser->tok != ')') {
parseerror(parser, "expected closing paren after 'while' condition");
ast_unref(cond);
return false;
}
/* parse into the 'then' branch */
if (!parser_next(parser)) {
parseerror(parser, "expected while-loop body");
ast_unref(cond);
return false;
}
if (!parse_statement_or_block(parser, &ontrue)) {
ast_unref(cond);
return false;
}
cond = process_condition(parser, cond, &ifnot);
if (!cond) {
ast_unref(ontrue);
return false;
}
aloop = ast_loop_new(ctx, NULL, cond, ifnot, NULL, false, NULL, ontrue);
*out = (ast_expression*)aloop;
return true;
}
static bool parse_dowhile_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_dowhile(parser_t *parser, ast_block *block, ast_expression **out)
{
bool rv;
char *label = NULL;
/* skip the 'do' and get the body */
if (!parser_next(parser)) {
if (OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "expected loop label or body");
else
parseerror(parser, "expected loop body");
return false;
}
if (parser->tok == ':') {
if (!OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "labeled loops not activated, try using -floop-labels");
if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected loop label");
return false;
}
label = util_strdup(parser_tokval(parser));
if (!parser_next(parser)) {
mem_d(label);
parseerror(parser, "expected loop body");
return false;
}
}
vec_push(parser->breaks, label);
vec_push(parser->continues, label);
rv = parse_dowhile_go(parser, block, out);
if (label)
mem_d(label);
if (vec_last(parser->breaks) != label || vec_last(parser->continues) != label) {
parseerror(parser, "internal error: label stack corrupted");
rv = false;
/*
* Test for NULL otherwise ast_delete dereferences null pointer
* and boom.
*/
if (*out)
ast_delete(*out);
*out = NULL;
}
else {
vec_pop(parser->breaks);
vec_pop(parser->continues);
}
return rv;
}
static bool parse_dowhile_go(parser_t *parser, ast_block *block, ast_expression **out)
{
ast_loop *aloop;
ast_expression *cond, *ontrue;
bool ifnot = false;
lex_ctx_t ctx = parser_ctx(parser);
(void)block; /* not touching */
if (!parse_statement_or_block(parser, &ontrue))
return false;
/* expect the "while" */
if (parser->tok != TOKEN_KEYWORD ||
strcmp(parser_tokval(parser), "while"))
{
parseerror(parser, "expected 'while' and condition");
ast_delete(ontrue);
return false;
}
/* skip the 'while' and check for opening paren */
if (!parser_next(parser) || parser->tok != '(') {
parseerror(parser, "expected 'while' condition in parenthesis");
ast_delete(ontrue);
return false;
}
/* parse into the expression */
if (!parser_next(parser)) {
parseerror(parser, "expected 'while' condition after opening paren");
ast_delete(ontrue);
return false;
}
/* parse the condition */
cond = parse_expression_leave(parser, false, true, false);
if (!cond)
return false;
/* closing paren */
if (parser->tok != ')') {
parseerror(parser, "expected closing paren after 'while' condition");
ast_delete(ontrue);
ast_unref(cond);
return false;
}
/* parse on */
if (!parser_next(parser) || parser->tok != ';') {
parseerror(parser, "expected semicolon after condition");
ast_delete(ontrue);
ast_unref(cond);
return false;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error");
ast_delete(ontrue);
ast_unref(cond);
return false;
}
cond = process_condition(parser, cond, &ifnot);
if (!cond) {
ast_delete(ontrue);
return false;
}
aloop = ast_loop_new(ctx, NULL, NULL, false, cond, ifnot, NULL, ontrue);
*out = (ast_expression*)aloop;
return true;
}
static bool parse_for_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_for(parser_t *parser, ast_block *block, ast_expression **out)
{
bool rv;
char *label = NULL;
/* skip the 'for' and check for opening paren */
if (!parser_next(parser)) {
if (OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "expected loop label or 'for' expressions in parenthesis");
else
parseerror(parser, "expected 'for' expressions in parenthesis");
return false;
}
if (parser->tok == ':') {
if (!OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "labeled loops not activated, try using -floop-labels");
if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected loop label");
return false;
}
label = util_strdup(parser_tokval(parser));
if (!parser_next(parser)) {
mem_d(label);
parseerror(parser, "expected 'for' expressions in parenthesis");
return false;
}
}
if (parser->tok != '(') {
parseerror(parser, "expected 'for' expressions in parenthesis");
return false;
}
vec_push(parser->breaks, label);
vec_push(parser->continues, label);
rv = parse_for_go(parser, block, out);
if (label)
mem_d(label);
if (vec_last(parser->breaks) != label || vec_last(parser->continues) != label) {
parseerror(parser, "internal error: label stack corrupted");
rv = false;
ast_delete(*out);
*out = NULL;
}
else {
vec_pop(parser->breaks);
vec_pop(parser->continues);
}
return rv;
}
static bool parse_for_go(parser_t *parser, ast_block *block, ast_expression **out)
{
ast_loop *aloop;
ast_expression *initexpr, *cond, *increment, *ontrue;
ast_value *typevar;
bool ifnot = false;
lex_ctx_t ctx = parser_ctx(parser);
parser_enterblock(parser);
initexpr = NULL;
cond = NULL;
increment = NULL;
ontrue = NULL;
/* parse into the expression */
if (!parser_next(parser)) {
parseerror(parser, "expected 'for' initializer after opening paren");
goto onerr;
}
typevar = NULL;
if (parser->tok == TOKEN_IDENT)
typevar = parser_find_typedef(parser, parser_tokval(parser), 0);
if (typevar || parser->tok == TOKEN_TYPENAME) {
#if 0
if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
if (parsewarning(parser, WARN_EXTENSIONS,
"current standard does not allow variable declarations in for-loop initializers"))
goto onerr;
}
#endif
if (!parse_variable(parser, block, true, CV_VAR, typevar, false, false, 0, NULL))
goto onerr;
}
else if (parser->tok != ';')
{
initexpr = parse_expression_leave(parser, false, false, false);
if (!initexpr)
goto onerr;
}
/* move on to condition */
if (parser->tok != ';') {
parseerror(parser, "expected semicolon after for-loop initializer");
goto onerr;
}
if (!parser_next(parser)) {
parseerror(parser, "expected for-loop condition");
goto onerr;
}
/* parse the condition */
if (parser->tok != ';') {
cond = parse_expression_leave(parser, false, true, false);
if (!cond)
goto onerr;
}
/* move on to incrementor */
if (parser->tok != ';') {
parseerror(parser, "expected semicolon after for-loop initializer");
goto onerr;
}
if (!parser_next(parser)) {
parseerror(parser, "expected for-loop condition");
goto onerr;
}
/* parse the incrementor */
if (parser->tok != ')') {
lex_ctx_t condctx = parser_ctx(parser);
increment = parse_expression_leave(parser, false, false, false);
if (!increment)
goto onerr;
if (!ast_side_effects(increment)) {
if (compile_warning(condctx, WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
goto onerr;
}
}
/* closing paren */
if (parser->tok != ')') {
parseerror(parser, "expected closing paren after 'for-loop' incrementor");
goto onerr;
}
/* parse into the 'then' branch */
if (!parser_next(parser)) {
parseerror(parser, "expected for-loop body");
goto onerr;
}
if (!parse_statement_or_block(parser, &ontrue))
goto onerr;
if (cond) {
cond = process_condition(parser, cond, &ifnot);
if (!cond)
goto onerr;
}
aloop = ast_loop_new(ctx, initexpr, cond, ifnot, NULL, false, increment, ontrue);
*out = (ast_expression*)aloop;
if (!parser_leaveblock(parser)) {
ast_delete(aloop);
return false;
}
return true;
onerr:
if (initexpr) ast_unref(initexpr);
if (cond) ast_unref(cond);
if (increment) ast_unref(increment);
(void)!parser_leaveblock(parser);
return false;
}
static bool parse_return(parser_t *parser, ast_block *block, ast_expression **out)
{
ast_expression *exp = NULL;
ast_expression *var = NULL;
ast_return *ret = NULL;
ast_value *retval = parser->function->return_value;
ast_value *expected = parser->function->vtype;
lex_ctx_t ctx = parser_ctx(parser);
(void)block; /* not touching */
if (!parser_next(parser)) {
parseerror(parser, "expected return expression");
return false;
}
/* return assignments */
if (parser->tok == '=') {
if (!OPTS_FLAG(RETURN_ASSIGNMENTS)) {
parseerror(parser, "return assignments not activated, try using -freturn-assigments");
return false;
}
if (type_store_instr[expected->expression.next->vtype] == VINSTR_END) {
char ty1[1024];
ast_type_to_string(expected->expression.next, ty1, sizeof(ty1));
parseerror(parser, "invalid return type: `%s'", ty1);
return false;
}
if (!parser_next(parser)) {
parseerror(parser, "expected return assignment expression");
return false;
}
if (!(exp = parse_expression_leave(parser, false, false, false)))
return false;
/* prepare the return value */
if (!retval) {
retval = ast_value_new(ctx, "#LOCAL_RETURN", TYPE_VOID);
ast_type_adopt(retval, expected->expression.next);
parser->function->return_value = retval;
}
if (!ast_compare_type(exp, (ast_expression*)retval)) {
char ty1[1024], ty2[1024];
ast_type_to_string(exp, ty1, sizeof(ty1));
ast_type_to_string(&retval->expression, ty2, sizeof(ty2));
parseerror(parser, "invalid type for return value: `%s', expected `%s'", ty1, ty2);
}
/* store to 'return' local variable */
var = (ast_expression*)ast_store_new(
ctx,
type_store_instr[expected->expression.next->vtype],
(ast_expression*)retval, exp);
if (!var) {
ast_unref(exp);
return false;
}
if (parser->tok != ';')
parseerror(parser, "missing semicolon after return assignment");
else if (!parser_next(parser))
parseerror(parser, "parse error after return assignment");
*out = var;
return true;
}
if (parser->tok != ';') {
exp = parse_expression(parser, false, false);
if (!exp)
return false;
if (exp->vtype != TYPE_NIL &&
exp->vtype != ((ast_expression*)expected)->next->vtype)
{
parseerror(parser, "return with invalid expression");
}
ret = ast_return_new(ctx, exp);
if (!ret) {
ast_unref(exp);
return false;
}
} else {
if (!parser_next(parser))
parseerror(parser, "parse error");
if (!retval && expected->expression.next->vtype != TYPE_VOID)
{
(void)!parsewarning(parser, WARN_MISSING_RETURN_VALUES, "return without value");
}
ret = ast_return_new(ctx, (ast_expression*)retval);
}
*out = (ast_expression*)ret;
return true;
}
static bool parse_break_continue(parser_t *parser, ast_block *block, ast_expression **out, bool is_continue)
{
size_t i;
unsigned int levels = 0;
lex_ctx_t ctx = parser_ctx(parser);
const char **loops = (is_continue ? parser->continues : parser->breaks);
(void)block; /* not touching */
if (!parser_next(parser)) {
parseerror(parser, "expected semicolon or loop label");
return false;
}
if (!vec_size(loops)) {
if (is_continue)
parseerror(parser, "`continue` can only be used inside loops");
else
parseerror(parser, "`break` can only be used inside loops or switches");
}
if (parser->tok == TOKEN_IDENT) {
if (!OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "labeled loops not activated, try using -floop-labels");
i = vec_size(loops);
while (i--) {
if (loops[i] && !strcmp(loops[i], parser_tokval(parser)))
break;
if (!i) {
parseerror(parser, "no such loop to %s: `%s`",
(is_continue ? "continue" : "break out of"),
parser_tokval(parser));
return false;
}
++levels;
}
if (!parser_next(parser)) {
parseerror(parser, "expected semicolon");
return false;
}
}
if (parser->tok != ';') {
parseerror(parser, "expected semicolon");
return false;
}
if (!parser_next(parser))
parseerror(parser, "parse error");
*out = (ast_expression*)ast_breakcont_new(ctx, is_continue, levels);
return true;
}
/* returns true when it was a variable qualifier, false otherwise!
* on error, cvq is set to CV_WRONG
*/
typedef struct {
const char *name;
size_t flag;
} attribute_t;
static bool parse_qualifiers(parser_t *parser, bool with_local, int *cvq, bool *noref, bool *is_static, uint32_t *_flags, char **message)
{
bool had_const = false;
bool had_var = false;
bool had_noref = false;
bool had_attrib = false;
bool had_static = false;
uint32_t flags = 0;
static attribute_t attributes[] = {
{ "noreturn", AST_FLAG_NORETURN },
{ "inline", AST_FLAG_INLINE },
{ "eraseable", AST_FLAG_ERASEABLE },
{ "accumulate", AST_FLAG_ACCUMULATE },
{ "last", AST_FLAG_FINAL_DECL }
};
*cvq = CV_NONE;
for (;;) {
size_t i;
if (parser->tok == TOKEN_ATTRIBUTE_OPEN) {
had_attrib = true;
/* parse an attribute */
if (!parser_next(parser)) {
parseerror(parser, "expected attribute after `[[`");
*cvq = CV_WRONG;
return false;
}
for (i = 0; i < GMQCC_ARRAY_COUNT(attributes); i++) {
if (!strcmp(parser_tokval(parser), attributes[i].name)) {
flags |= attributes[i].flag;
if (!parser_next(parser) || parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
parseerror(parser, "`%s` attribute has no parameters, expected `]]`",
attributes[i].name);
*cvq = CV_WRONG;
return false;
}
break;
}
}
if (i != GMQCC_ARRAY_COUNT(attributes))
goto leave;
if (!strcmp(parser_tokval(parser), "noref")) {
had_noref = true;
if (!parser_next(parser) || parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
parseerror(parser, "`noref` attribute has no parameters, expected `]]`");
*cvq = CV_WRONG;
return false;
}
}
else if (!strcmp(parser_tokval(parser), "alias") && !(flags & AST_FLAG_ALIAS)) {
flags |= AST_FLAG_ALIAS;
*message = NULL;
if (!parser_next(parser)) {
parseerror(parser, "parse error in attribute");
goto argerr;
}
if (parser->tok == '(') {
if (!parser_next(parser) || parser->tok != TOKEN_STRINGCONST) {
parseerror(parser, "`alias` attribute missing parameter");
goto argerr;
}
*message = util_strdup(parser_tokval(parser));
if (!parser_next(parser)) {
parseerror(parser, "parse error in attribute");
goto argerr;
}
if (parser->tok != ')') {
parseerror(parser, "`alias` attribute expected `)` after parameter");
goto argerr;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error in attribute");
goto argerr;
}
}
if (parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
parseerror(parser, "`alias` attribute expected `]]`");
goto argerr;
}
}
else if (!strcmp(parser_tokval(parser), "deprecated") && !(flags & AST_FLAG_DEPRECATED)) {
flags |= AST_FLAG_DEPRECATED;
*message = NULL;
if (!parser_next(parser)) {
parseerror(parser, "parse error in attribute");
goto argerr;
}
if (parser->tok == '(') {
if (!parser_next(parser) || parser->tok != TOKEN_STRINGCONST) {
parseerror(parser, "`deprecated` attribute missing parameter");
goto argerr;
}
*message = util_strdup(parser_tokval(parser));
if (!parser_next(parser)) {
parseerror(parser, "parse error in attribute");
goto argerr;
}
if(parser->tok != ')') {
parseerror(parser, "`deprecated` attribute expected `)` after parameter");
goto argerr;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error in attribute");
goto argerr;
}
}
/* no message */
if (parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
parseerror(parser, "`deprecated` attribute expected `]]`");
argerr: /* ugly */
if (*message) mem_d(*message);
*message = NULL;
*cvq = CV_WRONG;
return false;
}
}
else if (!strcmp(parser_tokval(parser), "coverage") && !(flags & AST_FLAG_COVERAGE)) {
flags |= AST_FLAG_COVERAGE;
if (!parser_next(parser)) {
error_in_coverage:
parseerror(parser, "parse error in coverage attribute");
*cvq = CV_WRONG;
return false;
}
if (parser->tok == '(') {
if (!parser_next(parser)) {
bad_coverage_arg:
parseerror(parser, "invalid parameter for coverage() attribute\n"
"valid are: block");
*cvq = CV_WRONG;
return false;
}
if (parser->tok != ')') {
do {
if (parser->tok != TOKEN_IDENT)
goto bad_coverage_arg;
if (!strcmp(parser_tokval(parser), "block"))
flags |= AST_FLAG_BLOCK_COVERAGE;
else if (!strcmp(parser_tokval(parser), "none"))
flags &= ~(AST_FLAG_COVERAGE_MASK);
else
goto bad_coverage_arg;
if (!parser_next(parser))
goto error_in_coverage;
if (parser->tok == ',') {
if (!parser_next(parser))
goto error_in_coverage;
}
} while (parser->tok != ')');
}
if (parser->tok != ')' || !parser_next(parser))
goto error_in_coverage;
} else {
/* without parameter [[coverage]] equals [[coverage(block)]] */
flags |= AST_FLAG_BLOCK_COVERAGE;
}
}
else
{
/* Skip tokens until we hit a ]] */
(void)!parsewarning(parser, WARN_UNKNOWN_ATTRIBUTE, "unknown attribute starting with `%s`", parser_tokval(parser));
while (parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
if (!parser_next(parser)) {
parseerror(parser, "error inside attribute");
*cvq = CV_WRONG;
return false;
}
}
}
}
else if (with_local && !strcmp(parser_tokval(parser), "static"))
had_static = true;
else if (!strcmp(parser_tokval(parser), "const"))
had_const = true;
else if (!strcmp(parser_tokval(parser), "var"))
had_var = true;
else if (with_local && !strcmp(parser_tokval(parser), "local"))
had_var = true;
else if (!strcmp(parser_tokval(parser), "noref"))
had_noref = true;
else if (!had_const && !had_var && !had_noref && !had_attrib && !had_static && !flags) {
return false;
}
else
break;
leave:
if (!parser_next(parser))
goto onerr;
}
if (had_const)
*cvq = CV_CONST;
else if (had_var)
*cvq = CV_VAR;
else
*cvq = CV_NONE;
*noref = had_noref;
*is_static = had_static;
*_flags = flags;
return true;
onerr:
parseerror(parser, "parse error after variable qualifier");
*cvq = CV_WRONG;
return true;
}
static bool parse_switch_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_switch(parser_t *parser, ast_block *block, ast_expression **out)
{
bool rv;
char *label = NULL;
/* skip the 'while' and get the body */
if (!parser_next(parser)) {
if (OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "expected loop label or 'switch' operand in parenthesis");
else
parseerror(parser, "expected 'switch' operand in parenthesis");
return false;
}
if (parser->tok == ':') {
if (!OPTS_FLAG(LOOP_LABELS))
parseerror(parser, "labeled loops not activated, try using -floop-labels");
if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected loop label");
return false;
}
label = util_strdup(parser_tokval(parser));
if (!parser_next(parser)) {
mem_d(label);
parseerror(parser, "expected 'switch' operand in parenthesis");
return false;
}
}
if (parser->tok != '(') {
parseerror(parser, "expected 'switch' operand in parenthesis");
return false;
}
vec_push(parser->breaks, label);
rv = parse_switch_go(parser, block, out);
if (label)
mem_d(label);
if (vec_last(parser->breaks) != label) {
parseerror(parser, "internal error: label stack corrupted");
rv = false;
ast_delete(*out);
*out = NULL;
}
else {
vec_pop(parser->breaks);
}
return rv;
}
static bool parse_switch_go(parser_t *parser, ast_block *block, ast_expression **out)
{
ast_expression *operand;
ast_value *opval;
ast_value *typevar;
ast_switch *switchnode;
ast_switch_case swcase;
int cvq;
bool noref, is_static;
uint32_t qflags = 0;
lex_ctx_t ctx = parser_ctx(parser);
(void)block; /* not touching */
(void)opval;
/* parse into the expression */
if (!parser_next(parser)) {
parseerror(parser, "expected switch operand");
return false;
}
/* parse the operand */
operand = parse_expression_leave(parser, false, false, false);
if (!operand)
return false;
switchnode = ast_switch_new(ctx, operand);
/* closing paren */
if (parser->tok != ')') {
ast_delete(switchnode);
parseerror(parser, "expected closing paren after 'switch' operand");
return false;
}
/* parse over the opening paren */
if (!parser_next(parser) || parser->tok != '{') {
ast_delete(switchnode);
parseerror(parser, "expected list of cases");
return false;
}
if (!parser_next(parser)) {
ast_delete(switchnode);
parseerror(parser, "expected 'case' or 'default'");
return false;
}
/* new block; allow some variables to be declared here */
parser_enterblock(parser);
while (true) {
typevar = NULL;
if (parser->tok == TOKEN_IDENT)
typevar = parser_find_typedef(parser, parser_tokval(parser), 0);
if (typevar || parser->tok == TOKEN_TYPENAME) {
if (!parse_variable(parser, block, false, CV_NONE, typevar, false, false, 0, NULL)) {
ast_delete(switchnode);
return false;
}
continue;
}
if (parse_qualifiers(parser, true, &cvq, &noref, &is_static, &qflags, NULL))
{
if (cvq == CV_WRONG) {
ast_delete(switchnode);
return false;
}
if (!parse_variable(parser, block, false, cvq, NULL, noref, is_static, qflags, NULL)) {
ast_delete(switchnode);
return false;
}
continue;
}
break;
}
/* case list! */
while (parser->tok != '}') {
ast_block *caseblock;
if (!strcmp(parser_tokval(parser), "case")) {
if (!parser_next(parser)) {
ast_delete(switchnode);
parseerror(parser, "expected expression for case");
return false;
}
swcase.value = parse_expression_leave(parser, false, false, false);
if (!swcase.value) {
ast_delete(switchnode);
parseerror(parser, "expected expression for case");
return false;
}
if (!OPTS_FLAG(RELAXED_SWITCH)) {
if (!ast_istype(swcase.value, ast_value)) { /* || ((ast_value*)swcase.value)->cvq != CV_CONST) { */
parseerror(parser, "case on non-constant values need to be explicitly enabled via -frelaxed-switch");
ast_unref(operand);
return false;
}
}
}
else if (!strcmp(parser_tokval(parser), "default")) {
swcase.value = NULL;
if (!parser_next(parser)) {
ast_delete(switchnode);
parseerror(parser, "expected colon");
return false;
}
}
else {
ast_delete(switchnode);
parseerror(parser, "expected 'case' or 'default'");
return false;
}
/* Now the colon and body */
if (parser->tok != ':') {
if (swcase.value) ast_unref(swcase.value);
ast_delete(switchnode);
parseerror(parser, "expected colon");
return false;
}
if (!parser_next(parser)) {
if (swcase.value) ast_unref(swcase.value);
ast_delete(switchnode);
parseerror(parser, "expected statements or case");
return false;
}
caseblock = ast_block_new(parser_ctx(parser));
if (!caseblock) {
if (swcase.value) ast_unref(swcase.value);
ast_delete(switchnode);
return false;
}
swcase.code = (ast_expression*)caseblock;
vec_push(switchnode->cases, swcase);
while (true) {
ast_expression *expr;
if (parser->tok == '}')
break;
if (parser->tok == TOKEN_KEYWORD) {
if (!strcmp(parser_tokval(parser), "case") ||
!strcmp(parser_tokval(parser), "default"))
{
break;
}
}
if (!parse_statement(parser, caseblock, &expr, true)) {
ast_delete(switchnode);
return false;
}
if (!expr)
continue;
if (!ast_block_add_expr(caseblock, expr)) {
ast_delete(switchnode);
return false;
}
}
}
parser_leaveblock(parser);
/* closing paren */
if (parser->tok != '}') {
ast_delete(switchnode);
parseerror(parser, "expected closing paren of case list");
return false;
}
if (!parser_next(parser)) {
ast_delete(switchnode);
parseerror(parser, "parse error after switch");
return false;
}
*out = (ast_expression*)switchnode;
return true;
}
/* parse computed goto sides */
static ast_expression *parse_goto_computed(parser_t *parser, ast_expression **side) {
ast_expression *on_true;
ast_expression *on_false;
ast_expression *cond;
if (!*side)
return NULL;
if (ast_istype(*side, ast_ternary)) {
ast_ternary *tern = (ast_ternary*)*side;
on_true = parse_goto_computed(parser, &tern->on_true);
on_false = parse_goto_computed(parser, &tern->on_false);
if (!on_true || !on_false) {
parseerror(parser, "expected label or expression in ternary");
if (on_true) ast_unref(on_true);
if (on_false) ast_unref(on_false);
return NULL;
}
cond = tern->cond;
tern->cond = NULL;
ast_delete(tern);
*side = NULL;
return (ast_expression*)ast_ifthen_new(parser_ctx(parser), cond, on_true, on_false);
} else if (ast_istype(*side, ast_label)) {
ast_goto *gt = ast_goto_new(parser_ctx(parser), ((ast_label*)*side)->name);
ast_goto_set_label(gt, ((ast_label*)*side));
*side = NULL;
return (ast_expression*)gt;
}
return NULL;
}
static bool parse_goto(parser_t *parser, ast_expression **out)
{
ast_goto *gt = NULL;
ast_expression *lbl;
if (!parser_next(parser))
return false;
if (parser->tok != TOKEN_IDENT) {
ast_expression *expression;
/* could be an expression i.e computed goto :-) */
if (parser->tok != '(') {
parseerror(parser, "expected label name after `goto`");
return false;
}
/* failed to parse expression for goto */
if (!(expression = parse_expression(parser, false, true)) ||
!(*out = parse_goto_computed(parser, &expression))) {
parseerror(parser, "invalid goto expression");
if(expression)
ast_unref(expression);
return false;
}
return true;
}
/* not computed goto */
gt = ast_goto_new(parser_ctx(parser), parser_tokval(parser));
lbl = parser_find_label(parser, gt->name);
if (lbl) {
if (!ast_istype(lbl, ast_label)) {
parseerror(parser, "internal error: label is not an ast_label");
ast_delete(gt);
return false;
}
ast_goto_set_label(gt, (ast_label*)lbl);
}
else
vec_push(parser->gotos, gt);
if (!parser_next(parser) || parser->tok != ';') {
parseerror(parser, "semicolon expected after goto label");
return false;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error after goto");
return false;
}
*out = (ast_expression*)gt;
return true;
}
static bool parse_skipwhite(parser_t *parser)
{
do {
if (!parser_next(parser))
return false;
} while (parser->tok == TOKEN_WHITE && parser->tok < TOKEN_ERROR);
return parser->tok < TOKEN_ERROR;
}
static bool parse_eol(parser_t *parser)
{
if (!parse_skipwhite(parser))
return false;
return parser->tok == TOKEN_EOL;
}
static bool parse_pragma_do(parser_t *parser)
{
if (!parser_next(parser) ||
parser->tok != TOKEN_IDENT ||
strcmp(parser_tokval(parser), "pragma"))
{
parseerror(parser, "expected `pragma` keyword after `#`, got `%s`", parser_tokval(parser));
return false;
}
if (!parse_skipwhite(parser) || parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected pragma, got `%s`", parser_tokval(parser));
return false;
}
if (!strcmp(parser_tokval(parser), "noref")) {
if (!parse_skipwhite(parser) || parser->tok != TOKEN_INTCONST) {
parseerror(parser, "`noref` pragma requires an argument: 0 or 1");
return false;
}
parser->noref = !!parser_token(parser)->constval.i;
if (!parse_eol(parser)) {
parseerror(parser, "parse error after `noref` pragma");
return false;
}
}
else
{
(void)!parsewarning(parser, WARN_UNKNOWN_PRAGMAS, "ignoring #pragma %s", parser_tokval(parser));
/* skip to eol */
while (!parse_eol(parser)) {
parser_next(parser);
}
return true;
}
return true;
}
static bool parse_pragma(parser_t *parser)
{
bool rv;
parser->lex->flags.preprocessing = true;
parser->lex->flags.mergelines = true;
rv = parse_pragma_do(parser);
if (parser->tok != TOKEN_EOL) {
parseerror(parser, "junk after pragma");
rv = false;
}
parser->lex->flags.preprocessing = false;
parser->lex->flags.mergelines = false;
if (!parser_next(parser)) {
parseerror(parser, "parse error after pragma");
rv = false;
}
return rv;
}
static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases)
{
bool noref, is_static;
int cvq = CV_NONE;
uint32_t qflags = 0;
ast_value *typevar = NULL;
char *vstring = NULL;
*out = NULL;
if (parser->tok == TOKEN_IDENT)
typevar = parser_find_typedef(parser, parser_tokval(parser), 0);
if (typevar || parser->tok == TOKEN_TYPENAME || parser->tok == '.' || parser->tok == TOKEN_DOTS)
{
/* local variable */
if (!block) {
parseerror(parser, "cannot declare a variable from here");
return false;
}
if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
return false;
}
if (!parse_variable(parser, block, false, CV_NONE, typevar, false, false, 0, NULL))
return false;
return true;
}
else if (parse_qualifiers(parser, !!block, &cvq, &noref, &is_static, &qflags, &vstring))
{
if (cvq == CV_WRONG)
return false;
return parse_variable(parser, block, true, cvq, NULL, noref, is_static, qflags, vstring);
}
else if (parser->tok == TOKEN_KEYWORD)
{
if (!strcmp(parser_tokval(parser), "__builtin_debug_printtype"))
{
char ty[1024];
ast_value *tdef;
if (!parser_next(parser)) {
parseerror(parser, "parse error after __builtin_debug_printtype");
return false;
}
if (parser->tok == TOKEN_IDENT && (tdef = parser_find_typedef(parser, parser_tokval(parser), 0)))
{
ast_type_to_string((ast_expression*)tdef, ty, sizeof(ty));
con_out("__builtin_debug_printtype: `%s`=`%s`\n", tdef->name, ty);
if (!parser_next(parser)) {
parseerror(parser, "parse error after __builtin_debug_printtype typename argument");
return false;
}
}
else
{
if (!parse_statement(parser, block, out, allow_cases))
return false;
if (!*out)
con_out("__builtin_debug_printtype: got no output node\n");
else
{
ast_type_to_string(*out, ty, sizeof(ty));
con_out("__builtin_debug_printtype: `%s`\n", ty);
}
}
return true;
}
else if (!strcmp(parser_tokval(parser), "return"))
{
return parse_return(parser, block, out);
}
else if (!strcmp(parser_tokval(parser), "if"))
{
return parse_if(parser, block, out);
}
else if (!strcmp(parser_tokval(parser), "while"))
{
return parse_while(parser, block, out);
}
else if (!strcmp(parser_tokval(parser), "do"))
{
return parse_dowhile(parser, block, out);
}
else if (!strcmp(parser_tokval(parser), "for"))
{
if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
if (parsewarning(parser, WARN_EXTENSIONS, "for loops are not recognized in the original Quake C standard, to enable try an alternate standard --std=?"))
return false;
}
return parse_for(parser, block, out);
}
else if (!strcmp(parser_tokval(parser), "break"))
{
return parse_break_continue(parser, block, out, false);
}
else if (!strcmp(parser_tokval(parser), "continue"))
{
return parse_break_continue(parser, block, out, true);
}
else if (!strcmp(parser_tokval(parser), "switch"))
{
return parse_switch(parser, block, out);
}
else if (!strcmp(parser_tokval(parser), "case") ||
!strcmp(parser_tokval(parser), "default"))
{
if (!allow_cases) {
parseerror(parser, "unexpected 'case' label");
return false;
}
return true;
}
else if (!strcmp(parser_tokval(parser), "goto"))
{
return parse_goto(parser, out);
}
else if (!strcmp(parser_tokval(parser), "typedef"))
{
if (!parser_next(parser)) {
parseerror(parser, "expected type definition after 'typedef'");
return false;
}
return parse_typedef(parser);
}
parseerror(parser, "Unexpected keyword: `%s'", parser_tokval(parser));
return false;
}
else if (parser->tok == '{')
{
ast_block *inner;
inner = parse_block(parser);
if (!inner)
return false;
*out = (ast_expression*)inner;
return true;
}
else if (parser->tok == ':')
{
size_t i;
ast_label *label;
if (!parser_next(parser)) {
parseerror(parser, "expected label name");
return false;
}
if (parser->tok != TOKEN_IDENT) {
parseerror(parser, "label must be an identifier");
return false;
}
label = (ast_label*)parser_find_label(parser, parser_tokval(parser));
if (label) {
if (!label->undefined) {
parseerror(parser, "label `%s` already defined", label->name);
return false;
}
label->undefined = false;
}
else {
label = ast_label_new(parser_ctx(parser), parser_tokval(parser), false);
vec_push(parser->labels, label);
}
*out = (ast_expression*)label;
if (!parser_next(parser)) {
parseerror(parser, "parse error after label");
return false;
}
for (i = 0; i < vec_size(parser->gotos); ++i) {
if (!strcmp(parser->gotos[i]->name, label->name)) {
ast_goto_set_label(parser->gotos[i], label);
vec_remove(parser->gotos, i, 1);
--i;
}
}
return true;
}
else if (parser->tok == ';')
{
if (!parser_next(parser)) {
parseerror(parser, "parse error after empty statement");
return false;
}
return true;
}
else
{
lex_ctx_t ctx = parser_ctx(parser);
ast_expression *exp = parse_expression(parser, false, false);
if (!exp)
return false;
*out = exp;
if (!ast_side_effects(exp)) {
if (compile_warning(ctx, WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
return false;
}
return true;
}
}
static bool parse_enum(parser_t *parser)
{
bool flag = false;
bool reverse = false;
qcfloat_t num = 0;
ast_value **values = NULL;
ast_value *var = NULL;
ast_value *asvalue;
ast_expression *old;
if (!parser_next(parser) || (parser->tok != '{' && parser->tok != ':')) {
parseerror(parser, "expected `{` or `:` after `enum` keyword");
return false;
}
/* enumeration attributes (can add more later) */
if (parser->tok == ':') {
if (!parser_next(parser) || parser->tok != TOKEN_IDENT){
parseerror(parser, "expected `flag` or `reverse` for enumeration attribute");
return false;
}
/* attributes? */
if (!strcmp(parser_tokval(parser), "flag")) {
num = 1;
flag = true;
}
else if (!strcmp(parser_tokval(parser), "reverse")) {
reverse = true;
}
else {
parseerror(parser, "invalid attribute `%s` for enumeration", parser_tokval(parser));
return false;
}
if (!parser_next(parser) || parser->tok != '{') {
parseerror(parser, "expected `{` after enum attribute ");
return false;
}
}
while (true) {
if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
if (parser->tok == '}') {
/* allow an empty enum */
break;
}
parseerror(parser, "expected identifier or `}`");
goto onerror;
}
old = parser_find_field(parser, parser_tokval(parser));
if (!old)
old = parser_find_global(parser, parser_tokval(parser));
if (old) {
parseerror(parser, "value `%s` has already been declared here: %s:%i",
parser_tokval(parser), ast_ctx(old).file, ast_ctx(old).line);
goto onerror;
}
var = ast_value_new(parser_ctx(parser), parser_tokval(parser), TYPE_FLOAT);
vec_push(values, var);
var->cvq = CV_CONST;
var->hasvalue = true;
/* for flagged enumerations increment in POTs of TWO */
var->constval.vfloat = (flag) ? (num *= 2) : (num ++);
parser_addglobal(parser, var->name, (ast_expression*)var);
if (!parser_next(parser)) {
parseerror(parser, "expected `=`, `}` or comma after identifier");
goto onerror;
}
if (parser->tok == ',')
continue;
if (parser->tok == '}')
break;
if (parser->tok != '=') {
parseerror(parser, "expected `=`, `}` or comma after identifier");
goto onerror;
}
if (!parser_next(parser)) {
parseerror(parser, "expected expression after `=`");
goto onerror;
}
/* We got a value! */
old = parse_expression_leave(parser, true, false, false);
asvalue = (ast_value*)old;
if (!ast_istype(old, ast_value) || asvalue->cvq != CV_CONST || !asvalue->hasvalue) {
compile_error(ast_ctx(var), "constant value or expression expected");
goto onerror;
}
num = (var->constval.vfloat = asvalue->constval.vfloat) + 1;
if (parser->tok == '}')
break;
if (parser->tok != ',') {
parseerror(parser, "expected `}` or comma after expression");
goto onerror;
}
}
/* patch them all (for reversed attribute) */
if (reverse) {
size_t i;
for (i = 0; i < vec_size(values); i++)
values[i]->constval.vfloat = vec_size(values) - i - 1;
}
if (parser->tok != '}') {
parseerror(parser, "internal error: breaking without `}`");
goto onerror;
}
if (!parser_next(parser) || parser->tok != ';') {
parseerror(parser, "expected semicolon after enumeration");
goto onerror;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error after enumeration");
goto onerror;
}
vec_free(values);
return true;
onerror:
vec_free(values);
return false;
}
static bool parse_block_into(parser_t *parser, ast_block *block)
{
bool retval = true;
parser_enterblock(parser);
if (!parser_next(parser)) { /* skip the '{' */
parseerror(parser, "expected function body");
goto cleanup;
}
while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
{
ast_expression *expr = NULL;
if (parser->tok == '}')
break;
if (!parse_statement(parser, block, &expr, false)) {
/* parseerror(parser, "parse error"); */
block = NULL;
goto cleanup;
}
if (!expr)
continue;
if (!ast_block_add_expr(block, expr)) {
ast_delete(block);
block = NULL;
goto cleanup;
}
}
if (parser->tok != '}') {
block = NULL;
} else {
(void)parser_next(parser);
}
cleanup:
if (!parser_leaveblock(parser))
retval = false;
return retval && !!block;
}
static ast_block* parse_block(parser_t *parser)
{
ast_block *block;
block = ast_block_new(parser_ctx(parser));
if (!block)
return NULL;
if (!parse_block_into(parser, block)) {
ast_block_delete(block);
return NULL;
}
return block;
}
static bool parse_statement_or_block(parser_t *parser, ast_expression **out)
{
if (parser->tok == '{') {
*out = (ast_expression*)parse_block(parser);
return !!*out;
}
return parse_statement(parser, NULL, out, false);
}
static bool create_vector_members(ast_value *var, ast_member **me)
{
size_t i;
size_t len = strlen(var->name);
for (i = 0; i < 3; ++i) {
char *name = (char*)mem_a(len+3);
memcpy(name, var->name, len);
name[len+0] = '_';
name[len+1] = 'x'+i;
name[len+2] = 0;
me[i] = ast_member_new(ast_ctx(var), (ast_expression*)var, i, name);
mem_d(name);
if (!me[i])
break;
}
if (i == 3)
return true;
/* unroll */
do { ast_member_delete(me[--i]); } while(i);
return false;
}
static bool parse_function_body(parser_t *parser, ast_value *var)
{
ast_block *block = NULL;
ast_function *func;
ast_function *old;
size_t parami;
ast_expression *framenum = NULL;
ast_expression *nextthink = NULL;
/* None of the following have to be deleted */
ast_expression *fld_think = NULL, *fld_nextthink = NULL, *fld_frame = NULL;
ast_expression *gbl_time = NULL, *gbl_self = NULL;
bool has_frame_think;
bool retval = true;
has_frame_think = false;
old = parser->function;
if (var->expression.flags & AST_FLAG_ALIAS) {
parseerror(parser, "function aliases cannot have bodies");
return false;
}
if (vec_size(parser->gotos) || vec_size(parser->labels)) {
parseerror(parser, "gotos/labels leaking");
return false;
}
if (!OPTS_FLAG(VARIADIC_ARGS) && var->expression.flags & AST_FLAG_VARIADIC) {
if (parsewarning(parser, WARN_VARIADIC_FUNCTION,
"variadic function with implementation will not be able to access additional parameters (try -fvariadic-args)"))
{
return false;
}
}
if (parser->tok == '[') {
/* got a frame definition: [ framenum, nextthink ]
* this translates to:
* self.frame = framenum;
* self.nextthink = time + 0.1;
* self.think = nextthink;
*/
nextthink = NULL;
fld_think = parser_find_field(parser, "think");
fld_nextthink = parser_find_field(parser, "nextthink");
fld_frame = parser_find_field(parser, "frame");
if (!fld_think || !fld_nextthink || !fld_frame) {
parseerror(parser, "cannot use [frame,think] notation without the required fields");
parseerror(parser, "please declare the following entityfields: `frame`, `think`, `nextthink`");
return false;
}
gbl_time = parser_find_global(parser, "time");
gbl_self = parser_find_global(parser, "self");
if (!gbl_time || !gbl_self) {
parseerror(parser, "cannot use [frame,think] notation without the required globals");
parseerror(parser, "please declare the following globals: `time`, `self`");
return false;
}
if (!parser_next(parser))
return false;
framenum = parse_expression_leave(parser, true, false, false);
if (!framenum) {
parseerror(parser, "expected a framenumber constant in[frame,think] notation");
return false;
}
if (!ast_istype(framenum, ast_value) || !( (ast_value*)framenum )->hasvalue) {
ast_unref(framenum);
parseerror(parser, "framenumber in [frame,think] notation must be a constant");
return false;
}
if (parser->tok != ',') {
ast_unref(framenum);
parseerror(parser, "expected comma after frame number in [frame,think] notation");
parseerror(parser, "Got a %i\n", parser->tok);
return false;
}
if (!parser_next(parser)) {
ast_unref(framenum);
return false;
}
if (parser->tok == TOKEN_IDENT && !parser_find_var(parser, parser_tokval(parser)))
{
/* qc allows the use of not-yet-declared functions here
* - this automatically creates a prototype */
ast_value *thinkfunc;
ast_expression *functype = fld_think->next;
thinkfunc = ast_value_new(parser_ctx(parser), parser_tokval(parser), functype->vtype);
if (!thinkfunc) { /* || !ast_type_adopt(thinkfunc, functype)*/
ast_unref(framenum);
parseerror(parser, "failed to create implicit prototype for `%s`", parser_tokval(parser));
return false;
}
ast_type_adopt(thinkfunc, functype);
if (!parser_next(parser)) {
ast_unref(framenum);
ast_delete(thinkfunc);
return false;
}
parser_addglobal(parser, thinkfunc->name, (ast_expression*)thinkfunc);
nextthink = (ast_expression*)thinkfunc;
} else {
nextthink = parse_expression_leave(parser, true, false, false);
if (!nextthink) {
ast_unref(framenum);
parseerror(parser, "expected a think-function in [frame,think] notation");
return false;
}
}
if (!ast_istype(nextthink, ast_value)) {
parseerror(parser, "think-function in [frame,think] notation must be a constant");
retval = false;
}
if (retval && parser->tok != ']') {
parseerror(parser, "expected closing `]` for [frame,think] notation");
retval = false;
}
if (retval && !parser_next(parser)) {
retval = false;
}
if (retval && parser->tok != '{') {
parseerror(parser, "a function body has to be declared after a [frame,think] declaration");
retval = false;
}
if (!retval) {
ast_unref(nextthink);
ast_unref(framenum);
return false;
}
has_frame_think = true;
}
block = ast_block_new(parser_ctx(parser));
if (!block) {
parseerror(parser, "failed to allocate block");
if (has_frame_think) {
ast_unref(nextthink);
ast_unref(framenum);
}
return false;
}
if (has_frame_think) {
lex_ctx_t ctx;
ast_expression *self_frame;
ast_expression *self_nextthink;
ast_expression *self_think;
ast_expression *time_plus_1;
ast_store *store_frame;
ast_store *store_nextthink;
ast_store *store_think;
ctx = parser_ctx(parser);
self_frame = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_frame);
self_nextthink = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_nextthink);
self_think = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_think);
time_plus_1 = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F,
gbl_time, (ast_expression*)fold_constgen_float(parser->fold, 0.1f));
if (!self_frame || !self_nextthink || !self_think || !time_plus_1) {
if (self_frame) ast_delete(self_frame);
if (self_nextthink) ast_delete(self_nextthink);
if (self_think) ast_delete(self_think);
if (time_plus_1) ast_delete(time_plus_1);
retval = false;
}
if (retval)
{
store_frame = ast_store_new(ctx, INSTR_STOREP_F, self_frame, framenum);
store_nextthink = ast_store_new(ctx, INSTR_STOREP_F, self_nextthink, time_plus_1);
store_think = ast_store_new(ctx, INSTR_STOREP_FNC, self_think, nextthink);
if (!store_frame) {
ast_delete(self_frame);
retval = false;
}
if (!store_nextthink) {
ast_delete(self_nextthink);
retval = false;
}
if (!store_think) {
ast_delete(self_think);
retval = false;
}
if (!retval) {
if (store_frame) ast_delete(store_frame);
if (store_nextthink) ast_delete(store_nextthink);
if (store_think) ast_delete(store_think);
retval = false;
}
if (!ast_block_add_expr(block, (ast_expression*)store_frame) ||
!ast_block_add_expr(block, (ast_expression*)store_nextthink) ||
!ast_block_add_expr(block, (ast_expression*)store_think))
{
retval = false;
}
}
if (!retval) {
parseerror(parser, "failed to generate code for [frame,think]");
ast_unref(nextthink);
ast_unref(framenum);
ast_delete(block);
return false;
}
}
if (var->hasvalue) {
if (!(var->expression.flags & AST_FLAG_ACCUMULATE)) {
parseerror(parser, "function `%s` declared with multiple bodies", var->name);
ast_block_delete(block);
goto enderr;
}
func = var->constval.vfunc;
if (!func) {
parseerror(parser, "internal error: NULL function: `%s`", var->name);
ast_block_delete(block);
goto enderr;
}
} else {
func = ast_function_new(ast_ctx(var), var->name, var);
if (!func) {
parseerror(parser, "failed to allocate function for `%s`", var->name);
ast_block_delete(block);
goto enderr;
}
vec_push(parser->functions, func);
}
parser_enterblock(parser);
for (parami = 0; parami < vec_size(var->expression.params); ++parami) {
size_t e;
ast_value *param = var->expression.params[parami];
ast_member *me[3];
if (param->expression.vtype != TYPE_VECTOR &&
(param->expression.vtype != TYPE_FIELD ||
param->expression.next->vtype != TYPE_VECTOR))
{
continue;
}
if (!create_vector_members(param, me)) {
ast_block_delete(block);
goto enderrfn;
}
for (e = 0; e < 3; ++e) {
parser_addlocal(parser, me[e]->name, (ast_expression*)me[e]);
ast_block_collect(block, (ast_expression*)me[e]);
}
}
if (var->argcounter && !func->argc) {
ast_value *argc = ast_value_new(ast_ctx(var), var->argcounter, TYPE_FLOAT);
parser_addlocal(parser, argc->name, (ast_expression*)argc);
func->argc = argc;
}
if (OPTS_FLAG(VARIADIC_ARGS) && var->expression.flags & AST_FLAG_VARIADIC && !func->varargs) {
char name[1024];
ast_value *varargs = ast_value_new(ast_ctx(var), "reserved:va_args", TYPE_ARRAY);
varargs->expression.flags |= AST_FLAG_IS_VARARG;
varargs->expression.next = (ast_expression*)ast_value_new(ast_ctx(var), NULL, TYPE_VECTOR);
varargs->expression.count = 0;
util_snprintf(name, sizeof(name), "%s##va##SET", var->name);
if (!parser_create_array_setter_proto(parser, varargs, name)) {
ast_delete(varargs);
ast_block_delete(block);
goto enderrfn;
}
util_snprintf(name, sizeof(name), "%s##va##GET", var->name);
if (!parser_create_array_getter_proto(parser, varargs, varargs->expression.next, name)) {
ast_delete(varargs);
ast_block_delete(block);
goto enderrfn;
}
func->varargs = varargs;
func->fixedparams = (ast_value*)fold_constgen_float(parser->fold, vec_size(var->expression.params));
}
parser->function = func;
if (!parse_block_into(parser, block)) {
ast_block_delete(block);
goto enderrfn;
}
vec_push(func->blocks, block);
parser->function = old;
if (!parser_leaveblock(parser))
retval = false;
if (vec_size(parser->variables) != PARSER_HT_LOCALS) {
parseerror(parser, "internal error: local scopes left");
retval = false;
}
if (parser->tok == ';')
return parser_next(parser);
else if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
parseerror(parser, "missing semicolon after function body (mandatory with -std=qcc)");
return retval;
enderrfn:
(void)!parser_leaveblock(parser);
vec_pop(parser->functions);
ast_function_delete(func);
var->constval.vfunc = NULL;
enderr:
parser->function = old;
return false;
}
static ast_expression *array_accessor_split(
parser_t *parser,
ast_value *array,
ast_value *index,
size_t middle,
ast_expression *left,
ast_expression *right
)
{
ast_ifthen *ifthen;
ast_binary *cmp;
lex_ctx_t ctx = ast_ctx(array);
if (!left || !right) {
if (left) ast_delete(left);
if (right) ast_delete(right);
return NULL;
}
cmp = ast_binary_new(ctx, INSTR_LT,
(ast_expression*)index,
(ast_expression*)fold_constgen_float(parser->fold, middle));
if (!cmp) {
ast_delete(left);
ast_delete(right);
parseerror(parser, "internal error: failed to create comparison for array setter");
return NULL;
}
ifthen = ast_ifthen_new(ctx, (ast_expression*)cmp, left, right);
if (!ifthen) {
ast_delete(cmp); /* will delete left and right */
parseerror(parser, "internal error: failed to create conditional jump for array setter");
return NULL;
}
return (ast_expression*)ifthen;
}
static ast_expression *array_setter_node(parser_t *parser, ast_value *array, ast_value *index, ast_value *value, size_t from, size_t afterend)
{
lex_ctx_t ctx = ast_ctx(array);
if (from+1 == afterend) {
/* set this value */
ast_block *block;
ast_return *ret;
ast_array_index *subscript;
ast_store *st;
int assignop = type_store_instr[value->expression.vtype];
if (value->expression.vtype == TYPE_FIELD && value->expression.next->vtype == TYPE_VECTOR)
assignop = INSTR_STORE_V;
subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)fold_constgen_float(parser->fold, from));
if (!subscript)
return NULL;
st = ast_store_new(ctx, assignop, (ast_expression*)subscript, (ast_expression*)value);
if (!st) {
ast_delete(subscript);
return NULL;
}
block = ast_block_new(ctx);
if (!block) {
ast_delete(st);
return NULL;
}
if (!ast_block_add_expr(block, (ast_expression*)st)) {
ast_delete(block);
return NULL;
}
ret = ast_return_new(ctx, NULL);
if (!ret) {
ast_delete(block);
return NULL;
}
if (!ast_block_add_expr(block, (ast_expression*)ret)) {
ast_delete(block);
return NULL;
}
return (ast_expression*)block;
} else {
ast_expression *left, *right;
size_t diff = afterend - from;
size_t middle = from + diff/2;
left = array_setter_node(parser, array, index, value, from, middle);
right = array_setter_node(parser, array, index, value, middle, afterend);
return array_accessor_split(parser, array, index, middle, left, right);
}
}
static ast_expression *array_field_setter_node(
parser_t *parser,
ast_value *array,
ast_value *entity,
ast_value *index,
ast_value *value,
size_t from,
size_t afterend)
{
lex_ctx_t ctx = ast_ctx(array);
if (from+1 == afterend) {
/* set this value */
ast_block *block;
ast_return *ret;
ast_entfield *entfield;
ast_array_index *subscript;
ast_store *st;
int assignop = type_storep_instr[value->expression.vtype];
if (value->expression.vtype == TYPE_FIELD && value->expression.next->vtype == TYPE_VECTOR)
assignop = INSTR_STOREP_V;
subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)fold_constgen_float(parser->fold, from));
if (!subscript)
return NULL;
subscript->expression.next = ast_type_copy(ast_ctx(subscript), (ast_expression*)subscript);
subscript->expression.vtype = TYPE_FIELD;
entfield = ast_entfield_new_force(ctx,
(ast_expression*)entity,
(ast_expression*)subscript,
(ast_expression*)subscript);
if (!entfield) {
ast_delete(subscript);
return NULL;
}
st = ast_store_new(ctx, assignop, (ast_expression*)entfield, (ast_expression*)value);
if (!st) {
ast_delete(entfield);
return NULL;
}
block = ast_block_new(ctx);
if (!block) {
ast_delete(st);
return NULL;
}
if (!ast_block_add_expr(block, (ast_expression*)st)) {
ast_delete(block);
return NULL;
}
ret = ast_return_new(ctx, NULL);
if (!ret) {
ast_delete(block);
return NULL;
}
if (!ast_block_add_expr(block, (ast_expression*)ret)) {
ast_delete(block);
return NULL;
}
return (ast_expression*)block;
} else {
ast_expression *left, *right;
size_t diff = afterend - from;
size_t middle = from + diff/2;
left = array_field_setter_node(parser, array, entity, index, value, from, middle);
right = array_field_setter_node(parser, array, entity, index, value, middle, afterend);
return array_accessor_split(parser, array, index, middle, left, right);
}
}
static ast_expression *array_getter_node(parser_t *parser, ast_value *array, ast_value *index, size_t from, size_t afterend)
{
lex_ctx_t ctx = ast_ctx(array);
if (from+1 == afterend) {
ast_return *ret;
ast_array_index *subscript;
subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)fold_constgen_float(parser->fold, from));
if (!subscript)
return NULL;
ret = ast_return_new(ctx, (ast_expression*)subscript);
if (!ret) {
ast_delete(subscript);
return NULL;
}
return (ast_expression*)ret;
} else {
ast_expression *left, *right;
size_t diff = afterend - from;
size_t middle = from + diff/2;
left = array_getter_node(parser, array, index, from, middle);
right = array_getter_node(parser, array, index, middle, afterend);
return array_accessor_split(parser, array, index, middle, left, right);
}
}
static bool parser_create_array_accessor(parser_t *parser, ast_value *array, const char *funcname, ast_value **out)
{
ast_function *func = NULL;
ast_value *fval = NULL;
ast_block *body = NULL;
fval = ast_value_new(ast_ctx(array), funcname, TYPE_FUNCTION);
if (!fval) {
parseerror(parser, "failed to create accessor function value");
return false;
}
fval->expression.flags &= ~(AST_FLAG_COVERAGE_MASK);
func = ast_function_new(ast_ctx(array), funcname, fval);
if (!func) {
ast_delete(fval);
parseerror(parser, "failed to create accessor function node");
return false;
}
body = ast_block_new(ast_ctx(array));
if (!body) {
parseerror(parser, "failed to create block for array accessor");
ast_delete(fval);
ast_delete(func);
return false;
}
vec_push(func->blocks, body);
*out = fval;
vec_push(parser->accessors, fval);
return true;
}
static ast_value* parser_create_array_setter_proto(parser_t *parser, ast_value *array, const char *funcname)
{
ast_value *index = NULL;
ast_value *value = NULL;
ast_function *func;
ast_value *fval;
if (!ast_istype(array->expression.next, ast_value)) {
parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
return NULL;
}
if (!parser_create_array_accessor(parser, array, funcname, &fval))
return NULL;
func = fval->constval.vfunc;
fval->expression.next = (ast_expression*)ast_value_new(ast_ctx(array), "<void>", TYPE_VOID);
index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);
value = ast_value_copy((ast_value*)array->expression.next);
if (!index || !value) {
parseerror(parser, "failed to create locals for array accessor");
goto cleanup;
}
(void)!ast_value_set_name(value, "value"); /* not important */
vec_push(fval->expression.params, index);
vec_push(fval->expression.params, value);
array->setter = fval;
return fval;
cleanup:
if (index) ast_delete(index);
if (value) ast_delete(value);
ast_delete(func);
ast_delete(fval);
return NULL;
}
static bool parser_create_array_setter_impl(parser_t *parser, ast_value *array)
{
ast_expression *root = NULL;
root = array_setter_node(parser, array,
array->setter->expression.params[0],
array->setter->expression.params[1],
0, array->expression.count);
if (!root) {
parseerror(parser, "failed to build accessor search tree");
return false;
}
if (!ast_block_add_expr(array->setter->constval.vfunc->blocks[0], root)) {
ast_delete(root);
return false;
}
return true;
}
static bool parser_create_array_setter(parser_t *parser, ast_value *array, const char *funcname)
{
if (!parser_create_array_setter_proto(parser, array, funcname))
return false;
return parser_create_array_setter_impl(parser, array);
}
static bool parser_create_array_field_setter(parser_t *parser, ast_value *array, const char *funcname)
{
ast_expression *root = NULL;
ast_value *entity = NULL;
ast_value *index = NULL;
ast_value *value = NULL;
ast_function *func;
ast_value *fval;
if (!ast_istype(array->expression.next, ast_value)) {
parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
return false;
}
if (!parser_create_array_accessor(parser, array, funcname, &fval))
return false;
func = fval->constval.vfunc;
fval->expression.next = (ast_expression*)ast_value_new(ast_ctx(array), "<void>", TYPE_VOID);
entity = ast_value_new(ast_ctx(array), "entity", TYPE_ENTITY);
index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);
value = ast_value_copy((ast_value*)array->expression.next);
if (!entity || !index || !value) {
parseerror(parser, "failed to create locals for array accessor");
goto cleanup;
}
(void)!ast_value_set_name(value, "value"); /* not important */
vec_push(fval->expression.params, entity);
vec_push(fval->expression.params, index);
vec_push(fval->expression.params, value);
root = array_field_setter_node(parser, array, entity, index, value, 0, array->expression.count);
if (!root) {
parseerror(parser, "failed to build accessor search tree");
goto cleanup;
}
array->setter = fval;
return ast_block_add_expr(func->blocks[0], root);
cleanup:
if (entity) ast_delete(entity);
if (index) ast_delete(index);
if (value) ast_delete(value);
if (root) ast_delete(root);
ast_delete(func);
ast_delete(fval);
return false;
}
static ast_value* parser_create_array_getter_proto(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname)
{
ast_value *index = NULL;
ast_value *fval;
ast_function *func;
/* NOTE: checking array->expression.next rather than elemtype since
* for fields elemtype is a temporary fieldtype.
*/
if (!ast_istype(array->expression.next, ast_value)) {
parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
return NULL;
}
if (!parser_create_array_accessor(parser, array, funcname, &fval))
return NULL;
func = fval->constval.vfunc;
fval->expression.next = ast_type_copy(ast_ctx(array), elemtype);
index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);
if (!index) {
parseerror(parser, "failed to create locals for array accessor");
goto cleanup;
}
vec_push(fval->expression.params, index);
array->getter = fval;
return fval;
cleanup:
if (index) ast_delete(index);
ast_delete(func);
ast_delete(fval);
return NULL;
}
static bool parser_create_array_getter_impl(parser_t *parser, ast_value *array)
{
ast_expression *root = NULL;
root = array_getter_node(parser, array, array->getter->expression.params[0], 0, array->expression.count);
if (!root) {
parseerror(parser, "failed to build accessor search tree");
return false;
}
if (!ast_block_add_expr(array->getter->constval.vfunc->blocks[0], root)) {
ast_delete(root);
return false;
}
return true;
}
static bool parser_create_array_getter(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname)
{
if (!parser_create_array_getter_proto(parser, array, elemtype, funcname))
return false;
return parser_create_array_getter_impl(parser, array);
}
static ast_value *parse_parameter_list(parser_t *parser, ast_value *var)
{
lex_ctx_t ctx;
size_t i;
ast_value **params;
ast_value *param;
ast_value *fval;
bool first = true;
bool variadic = false;
ast_value *varparam = NULL;
char *argcounter = NULL;
ctx = parser_ctx(parser);
/* for the sake of less code we parse-in in this function */
if (!parser_next(parser)) {
ast_delete(var);
parseerror(parser, "expected parameter list");
return NULL;
}
params = NULL;
/* parse variables until we hit a closing paren */
while (parser->tok != ')') {
bool is_varargs = false;
if (!first) {
/* there must be commas between them */
if (parser->tok != ',') {
parseerror(parser, "expected comma or end of parameter list");
goto on_error;
}
if (!parser_next(parser)) {
parseerror(parser, "expected parameter");
goto on_error;
}
}
first = false;
param = parse_typename(parser, NULL, NULL, &is_varargs);
if (!param && !is_varargs)
goto on_error;
if (is_varargs) {
/* '...' indicates a varargs function */
variadic = true;
if (parser->tok != ')' && parser->tok != TOKEN_IDENT) {
parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
goto on_error;
}
if (parser->tok == TOKEN_IDENT) {
argcounter = util_strdup(parser_tokval(parser));
if (!parser_next(parser) || parser->tok != ')') {
parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
goto on_error;
}
}
} else {
vec_push(params, param);
if (param->expression.vtype >= TYPE_VARIANT) {
char tname[1024]; /* typename is reserved in C++ */
ast_type_to_string((ast_expression*)param, tname, sizeof(tname));
parseerror(parser, "type not supported as part of a parameter list: %s", tname);
goto on_error;
}
/* type-restricted varargs */
if (parser->tok == TOKEN_DOTS) {
variadic = true;
varparam = vec_last(params);
vec_pop(params);
if (!parser_next(parser) || (parser->tok != ')' && parser->tok != TOKEN_IDENT)) {
parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
goto on_error;
}
if (parser->tok == TOKEN_IDENT) {
argcounter = util_strdup(parser_tokval(parser));
if (!parser_next(parser) || parser->tok != ')') {
parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
goto on_error;
}
}
}
}
}
if (vec_size(params) == 1 && params[0]->expression.vtype == TYPE_VOID)
vec_free(params);
/* sanity check */
if (vec_size(params) > 8 && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
(void)!parsewarning(parser, WARN_EXTENSIONS, "more than 8 parameters are not supported by this standard");
/* parse-out */
if (!parser_next(parser)) {
parseerror(parser, "parse error after typename");
goto on_error;
}
/* now turn 'var' into a function type */
fval = ast_value_new(ctx, "<type()>", TYPE_FUNCTION);
fval->expression.next = (ast_expression*)var;
if (variadic)
fval->expression.flags |= AST_FLAG_VARIADIC;
var = fval;
var->expression.params = params;
var->expression.varparam = (ast_expression*)varparam;
var->argcounter = argcounter;
params = NULL;
return var;
on_error:
if (argcounter)
mem_d(argcounter);
if (varparam)
ast_delete(varparam);
ast_delete(var);
for (i = 0; i < vec_size(params); ++i)
ast_delete(params[i]);
vec_free(params);
return NULL;
}
static ast_value *parse_arraysize(parser_t *parser, ast_value *var)
{
ast_expression *cexp;
ast_value *cval, *tmp;
lex_ctx_t ctx;
ctx = parser_ctx(parser);
if (!parser_next(parser)) {
ast_delete(var);
parseerror(parser, "expected array-size");
return NULL;
}
if (parser->tok != ']') {
cexp = parse_expression_leave(parser, true, false, false);
if (!cexp || !ast_istype(cexp, ast_value)) {
if (cexp)
ast_unref(cexp);
ast_delete(var);
parseerror(parser, "expected array-size as constant positive integer");
return NULL;
}
cval = (ast_value*)cexp;
}
else {
cexp = NULL;
cval = NULL;
}
tmp = ast_value_new(ctx, "<type[]>", TYPE_ARRAY);
tmp->expression.next = (ast_expression*)var;
var = tmp;
if (cval) {
if (cval->expression.vtype == TYPE_INTEGER)
tmp->expression.count = cval->constval.vint;
else if (cval->expression.vtype == TYPE_FLOAT)
tmp->expression.count = cval->constval.vfloat;
else {
ast_unref(cexp);
ast_delete(var);
parseerror(parser, "array-size must be a positive integer constant");
return NULL;
}
ast_unref(cexp);
} else {
var->expression.count = -1;
var->expression.flags |= AST_FLAG_ARRAY_INIT;
}
if (parser->tok != ']') {
ast_delete(var);
parseerror(parser, "expected ']' after array-size");
return NULL;
}
if (!parser_next(parser)) {
ast_delete(var);
parseerror(parser, "error after parsing array size");
return NULL;
}
return var;
}
/* Parse a complete typename.
* for single-variables (ie. function parameters or typedefs) storebase should be NULL
* but when parsing variables separated by comma
* 'storebase' should point to where the base-type should be kept.
* The base type makes up every bit of type information which comes *before* the
* variable name.
*
* NOTE: The value must either be named, have a NULL name, or a name starting
* with '<'. In the first case, this will be the actual variable or type
* name, in the other cases it is assumed that the name will appear
* later, and an error is generated otherwise.
*
* The following will be parsed in its entirety:
* void() foo()
* The 'basetype' in this case is 'void()'
* and if there's a comma after it, say:
* void() foo(), bar
* then the type-information 'void()' can be stored in 'storebase'
*/
static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef, bool *is_vararg)
{
ast_value *var, *tmp;
lex_ctx_t ctx;
const char *name = NULL;
bool isfield = false;
bool wasarray = false;
size_t morefields = 0;
bool vararg = (parser->tok == TOKEN_DOTS);
ctx = parser_ctx(parser);
/* types may start with a dot */
if (parser->tok == '.' || parser->tok == TOKEN_DOTS) {
isfield = true;
if (parser->tok == TOKEN_DOTS)
morefields += 2;
/* if we parsed a dot we need a typename now */
if (!parser_next(parser)) {
parseerror(parser, "expected typename for field definition");
return NULL;
}
/* Further dots are handled seperately because they won't be part of the
* basetype
*/
while (true) {
if (parser->tok == '.')
++morefields;
else if (parser->tok == TOKEN_DOTS)
morefields += 3;
else
break;
vararg = false;
if (!parser_next(parser)) {
parseerror(parser, "expected typename for field definition");
return NULL;
}
}
}
if (parser->tok == TOKEN_IDENT)
cached_typedef = parser_find_typedef(parser, parser_tokval(parser), 0);
if (!cached_typedef && parser->tok != TOKEN_TYPENAME) {
if (vararg && is_vararg) {
*is_vararg = true;
return NULL;
}
parseerror(parser, "expected typename");
return NULL;
}
/* generate the basic type value */
if (cached_typedef) {
var = ast_value_copy(cached_typedef);
ast_value_set_name(var, "<type(from_def)>");
} else
var = ast_value_new(ctx, "<type>", parser_token(parser)->constval.t);
for (; morefields; --morefields) {
tmp = ast_value_new(ctx, "<.type>", TYPE_FIELD);
tmp->expression.next = (ast_expression*)var;
var = tmp;
}
/* do not yet turn into a field - remember:
* .void() foo; is a field too
* .void()() foo; is a function
*/
/* parse on */
if (!parser_next(parser)) {
ast_delete(var);
parseerror(parser, "parse error after typename");
return NULL;
}
/* an opening paren now starts the parameter-list of a function
* this is where original-QC has parameter lists.
* We allow a single parameter list here.
* Much like fteqcc we don't allow `float()() x`
*/
if (parser->tok == '(') {
var = parse_parameter_list(parser, var);
if (!var)
return NULL;
}
/* store the base if requested */
if (storebase) {
*storebase = ast_value_copy(var);
if (isfield) {
tmp = ast_value_new(ctx, "<type:f>", TYPE_FIELD);
tmp->expression.next = (ast_expression*)*storebase;
*storebase = tmp;
}
}
/* there may be a name now */
if (parser->tok == TOKEN_IDENT || parser->tok == TOKEN_KEYWORD) {
if (!strcmp(parser_tokval(parser), "break"))
(void)!parsewarning(parser, WARN_BREAKDEF, "break definition ignored (suggest removing it)");
else if (parser->tok == TOKEN_KEYWORD)
goto leave;
name = util_strdup(parser_tokval(parser));
/* parse on */
if (!parser_next(parser)) {
ast_delete(var);
mem_d(name);
parseerror(parser, "error after variable or field declaration");
return NULL;
}
}
leave:
/* now this may be an array */
if (parser->tok == '[') {
wasarray = true;
var = parse_arraysize(parser, var);
if (!var) {
if (name) mem_d(name);
return NULL;
}
}
/* This is the point where we can turn it into a field */
if (isfield) {
/* turn it into a field if desired */
tmp = ast_value_new(ctx, "<type:f>", TYPE_FIELD);
tmp->expression.next = (ast_expression*)var;
var = tmp;
}
/* now there may be function parens again */
if (parser->tok == '(' && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
if (parser->tok == '(' && wasarray)
parseerror(parser, "arrays as part of a return type is not supported");
while (parser->tok == '(') {
var = parse_parameter_list(parser, var);
if (!var) {
if (name) mem_d(name);
return NULL;
}
}
/* finally name it */
if (name) {
if (!ast_value_set_name(var, name)) {
ast_delete(var);
mem_d(name);
parseerror(parser, "internal error: failed to set name");
return NULL;
}
/* free the name, ast_value_set_name duplicates */
mem_d(name);
}
return var;
}
static bool parse_typedef(parser_t *parser)
{
ast_value *typevar, *oldtype;
ast_expression *old;
typevar = parse_typename(parser, NULL, NULL, NULL);
if (!typevar)
return false;
/* while parsing types, the ast_value's get named '<something>' */
if (!typevar->name || typevar->name[0] == '<') {
parseerror(parser, "missing name in typedef");
ast_delete(typevar);
return false;
}
if ( (old = parser_find_var(parser, typevar->name)) ) {
parseerror(parser, "cannot define a type with the same name as a variable: %s\n"
" -> `%s` has been declared here: %s:%i",
typevar->name, ast_ctx(old).file, ast_ctx(old).line);
ast_delete(typevar);
return false;
}
if ( (oldtype = parser_find_typedef(parser, typevar->name, vec_last(parser->_blocktypedefs))) ) {
parseerror(parser, "type `%s` has already been declared here: %s:%i",
typevar->name, ast_ctx(oldtype).file, ast_ctx(oldtype).line);
ast_delete(typevar);
return false;
}
vec_push(parser->_typedefs, typevar);
util_htset(vec_last(parser->typedefs), typevar->name, typevar);
if (parser->tok != ';') {
parseerror(parser, "expected semicolon after typedef");
return false;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error after typedef");
return false;
}
return true;
}
static const char *cvq_to_str(int cvq) {
switch (cvq) {
case CV_NONE: return "none";
case CV_VAR: return "`var`";
case CV_CONST: return "`const`";
default: return "<INVALID>";
}
}
static bool parser_check_qualifiers(parser_t *parser, const ast_value *var, const ast_value *proto)
{
bool av, ao;
if (proto->cvq != var->cvq) {
if (!(proto->cvq == CV_CONST && var->cvq == CV_NONE &&
!OPTS_FLAG(INITIALIZED_NONCONSTANTS) &&
parser->tok == '='))
{
return !parsewarning(parser, WARN_DIFFERENT_QUALIFIERS,
"`%s` declared with different qualifiers: %s\n"
" -> previous declaration here: %s:%i uses %s",
var->name, cvq_to_str(var->cvq),
ast_ctx(proto).file, ast_ctx(proto).line,
cvq_to_str(proto->cvq));
}
}
av = (var ->expression.flags & AST_FLAG_NORETURN);
ao = (proto->expression.flags & AST_FLAG_NORETURN);
if (!av != !ao) {
return !parsewarning(parser, WARN_DIFFERENT_ATTRIBUTES,
"`%s` declared with different attributes%s\n"
" -> previous declaration here: %s:%i",
var->name, (av ? ": noreturn" : ""),
ast_ctx(proto).file, ast_ctx(proto).line,
(ao ? ": noreturn" : ""));
}
return true;
}
static bool create_array_accessors(parser_t *parser, ast_value *var)
{
char name[1024];
util_snprintf(name, sizeof(name), "%s##SET", var->name);
if (!parser_create_array_setter(parser, var, name))
return false;
util_snprintf(name, sizeof(name), "%s##GET", var->name);
if (!parser_create_array_getter(parser, var, var->expression.next, name))
return false;
return true;
}
static bool parse_array(parser_t *parser, ast_value *array)
{
size_t i;
if (array->initlist) {
parseerror(parser, "array already initialized elsewhere");
return false;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error in array initializer");
return false;
}
i = 0;
while (parser->tok != '}') {
ast_value *v = (ast_value*)parse_expression_leave(parser, true, false, false);
if (!v)
return false;
if (!ast_istype(v, ast_value) || !v->hasvalue || v->cvq != CV_CONST) {
ast_unref(v);
parseerror(parser, "initializing element must be a compile time constant");
return false;
}
vec_push(array->initlist, v->constval);
if (v->expression.vtype == TYPE_STRING) {
array->initlist[i].vstring = util_strdupe(array->initlist[i].vstring);
++i;
}
ast_unref(v);
if (parser->tok == '}')
break;
if (parser->tok != ',' || !parser_next(parser)) {
parseerror(parser, "expected comma or '}' in element list");
return false;
}
}
if (!parser_next(parser) || parser->tok != ';') {
parseerror(parser, "expected semicolon after initializer, got %s");
return false;
}
/*
if (!parser_next(parser)) {
parseerror(parser, "parse error after initializer");
return false;
}
*/
if (array->expression.flags & AST_FLAG_ARRAY_INIT) {
if (array->expression.count != (size_t)-1) {
parseerror(parser, "array `%s' has already been initialized with %u elements",
array->name, (unsigned)array->expression.count);
}
array->expression.count = vec_size(array->initlist);
if (!create_array_accessors(parser, array))
return false;
}
return true;
}
static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int qualifier, ast_value *cached_typedef, bool noref, bool is_static, uint32_t qflags, char *vstring)
{
ast_value *var;
ast_value *proto;
ast_expression *old;
bool was_end;
size_t i;
ast_value *basetype = NULL;
bool retval = true;
bool isparam = false;
bool isvector = false;
bool cleanvar = true;
bool wasarray = false;
ast_member *me[3] = { NULL, NULL, NULL };
if (!localblock && is_static)
parseerror(parser, "`static` qualifier is not supported in global scope");
/* get the first complete variable */
var = parse_typename(parser, &basetype, cached_typedef, NULL);
if (!var) {
if (basetype)
ast_delete(basetype);
return false;
}
/* while parsing types, the ast_value's get named '<something>' */
if (!var->name || var->name[0] == '<') {
parseerror(parser, "declaration does not declare anything");
if (basetype)
ast_delete(basetype);
return false;
}
while (true) {
proto = NULL;
wasarray = false;
/* Part 0: finish the type */
if (parser->tok == '(') {
if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
var = parse_parameter_list(parser, var);
if (!var) {
retval = false;
goto cleanup;
}
}
/* we only allow 1-dimensional arrays */
if (parser->tok == '[') {
wasarray = true;
var = parse_arraysize(parser, var);
if (!var) {
retval = false;
goto cleanup;
}
}
if (parser->tok == '(' && wasarray) {
parseerror(parser, "arrays as part of a return type is not supported");
/* we'll still parse the type completely for now */
}
/* for functions returning functions */
while (parser->tok == '(') {
if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
var = parse_parameter_list(parser, var);
if (!var) {
retval = false;
goto cleanup;
}
}
var->cvq = qualifier;
if (qflags & AST_FLAG_COVERAGE) /* specified in QC, drop our default */
var->expression.flags &= ~(AST_FLAG_COVERAGE_MASK);
var->expression.flags |= qflags;
/*
* store the vstring back to var for alias and
* deprecation messages.
*/
if (var->expression.flags & AST_FLAG_DEPRECATED ||
var->expression.flags & AST_FLAG_ALIAS)
var->desc = vstring;
if (parser_find_global(parser, var->name) && var->expression.flags & AST_FLAG_ALIAS) {
parseerror(parser, "function aliases cannot be forward declared");
retval = false;
goto cleanup;
}
/* Part 1:
* check for validity: (end_sys_..., multiple-definitions, prototypes, ...)
* Also: if there was a prototype, `var` will be deleted and set to `proto` which
* is then filled with the previous definition and the parameter-names replaced.
*/
if (!strcmp(var->name, "nil")) {
if (OPTS_FLAG(UNTYPED_NIL)) {
if (!localblock || !OPTS_FLAG(PERMISSIVE))
parseerror(parser, "name `nil` not allowed (try -fpermissive)");
} else
(void)!parsewarning(parser, WARN_RESERVED_NAMES, "variable name `nil` is reserved");
}
if (!localblock) {
/* Deal with end_sys_ vars */
was_end = false;
if (!strcmp(var->name, "end_sys_globals")) {
var->uses++;
parser->crc_globals = vec_size(parser->globals);
was_end = true;
}
else if (!strcmp(var->name, "end_sys_fields")) {
var->uses++;
parser->crc_fields = vec_size(parser->fields);
was_end = true;
}
if (was_end && var->expression.vtype == TYPE_FIELD) {
if (parsewarning(parser, WARN_END_SYS_FIELDS,
"global '%s' hint should not be a field",
parser_tokval(parser)))
{
retval = false;
goto cleanup;
}
}
if (!nofields && var->expression.vtype == TYPE_FIELD)
{
/* deal with field declarations */
old = parser_find_field(parser, var->name);
if (old) {
if (parsewarning(parser, WARN_FIELD_REDECLARED, "field `%s` already declared here: %s:%i",
var->name, ast_ctx(old).file, (int)ast_ctx(old).line))
{
retval = false;
goto cleanup;
}
ast_delete(var);
var = NULL;
goto skipvar;
/*
parseerror(parser, "field `%s` already declared here: %s:%i",
var->name, ast_ctx(old).file, ast_ctx(old).line);
retval = false;
goto cleanup;
*/
}
if ((OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC || OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_FTEQCC) &&
(old = parser_find_global(parser, var->name)))
{
parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
parseerror(parser, "field `%s` already declared here: %s:%i",
var->name, ast_ctx(old).file, ast_ctx(old).line);
retval = false;
goto cleanup;
}
}
else
{
/* deal with other globals */
old = parser_find_global(parser, var->name);
if (old && var->expression.vtype == TYPE_FUNCTION && old->vtype == TYPE_FUNCTION)
{
/* This is a function which had a prototype */
if (!ast_istype(old, ast_value)) {
parseerror(parser, "internal error: prototype is not an ast_value");
retval = false;
goto cleanup;
}
proto = (ast_value*)old;
proto->desc = var->desc;
if (!ast_compare_type((ast_expression*)proto, (ast_expression*)var)) {
parseerror(parser, "conflicting types for `%s`, previous declaration was here: %s:%i",
proto->name,
ast_ctx(proto).file, ast_ctx(proto).line);
retval = false;
goto cleanup;
}
/* we need the new parameter-names */
for (i = 0; i < vec_size(proto->expression.params); ++i)
ast_value_set_name(proto->expression.params[i], var->expression.params[i]->name);
if (!parser_check_qualifiers(parser, var, proto)) {
retval = false;
if (proto->desc)
mem_d(proto->desc);
proto = NULL;
goto cleanup;
}
proto->expression.flags |= var->expression.flags;
ast_delete(var);
var = proto;
}
else
{
/* other globals */
if (old) {
if (parsewarning(parser, WARN_DOUBLE_DECLARATION,
"global `%s` already declared here: %s:%i",
var->name, ast_ctx(old).file, ast_ctx(old).line))
{
retval = false;
goto cleanup;
}
if (old->flags & AST_FLAG_FINAL_DECL) {
parseerror(parser, "cannot redeclare variable `%s`, declared final here: %s:%i",
var->name, ast_ctx(old).file, ast_ctx(old).line);
retval = false;
goto cleanup;
}
proto = (ast_value*)old;
if (!ast_istype(old, ast_value)) {
parseerror(parser, "internal error: not an ast_value");
retval = false;
proto = NULL;
goto cleanup;
}
if (!parser_check_qualifiers(parser, var, proto)) {
retval = false;
proto = NULL;
goto cleanup;
}
proto->expression.flags |= var->expression.flags;
/* copy the context for finals,
* so the error can show where it was actually made 'final'
*/
if (proto->expression.flags & AST_FLAG_FINAL_DECL)
ast_ctx(old) = ast_ctx(var);
ast_delete(var);
var = proto;
}
if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC &&
(old = parser_find_field(parser, var->name)))
{
parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
parseerror(parser, "global `%s` already declared here: %s:%i",
var->name, ast_ctx(old).file, ast_ctx(old).line);
retval = false;
goto cleanup;
}
}
}
}
else /* it's not a global */
{
old = parser_find_local(parser, var->name, vec_size(parser->variables)-1, &isparam);
if (old && !isparam) {
parseerror(parser, "local `%s` already declared here: %s:%i",
var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
retval = false;
goto cleanup;
}
/* doing this here as the above is just for a single scope */
old = parser_find_local(parser, var->name, 0, &isparam);
if (old && isparam) {
if (parsewarning(parser, WARN_LOCAL_SHADOWS,
"local `%s` is shadowing a parameter", var->name))
{
parseerror(parser, "local `%s` already declared here: %s:%i",
var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
retval = false;
goto cleanup;
}
if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
ast_delete(var);
if (ast_istype(old, ast_value))
var = proto = (ast_value*)old;
else {
var = NULL;
goto skipvar;
}
}
}
}
/* in a noref section we simply bump the usecount */
if (noref || parser->noref)
var->uses++;
/* Part 2:
* Create the global/local, and deal with vector types.
*/
if (!proto) {
if (var->expression.vtype == TYPE_VECTOR)
isvector = true;
else if (var->expression.vtype == TYPE_FIELD &&
var->expression.next->vtype == TYPE_VECTOR)
isvector = true;
if (isvector) {
if (!create_vector_members(var, me)) {
retval = false;
goto cleanup;
}
}
if (!localblock) {
/* deal with global variables, fields, functions */
if (!nofields && var->expression.vtype == TYPE_FIELD && parser->tok != '=') {
var->isfield = true;
vec_push(parser->fields, (ast_expression*)var);
util_htset(parser->htfields, var->name, var);
if (isvector) {
for (i = 0; i < 3; ++i) {
vec_push(parser->fields, (ast_expression*)me[i]);
util_htset(parser->htfields, me[i]->name, me[i]);
}
}
}
else {
if (!(var->expression.flags & AST_FLAG_ALIAS)) {
parser_addglobal(parser, var->name, (ast_expression*)var);
if (isvector) {
for (i = 0; i < 3; ++i) {
parser_addglobal(parser, me[i]->name, (ast_expression*)me[i]);
}
}
} else {
ast_expression *find = parser_find_global(parser, var->desc);
if (!find) {
compile_error(parser_ctx(parser), "undeclared variable `%s` for alias `%s`", var->desc, var->name);
return false;
}
if (!ast_compare_type((ast_expression*)var, find)) {
char ty1[1024];
char ty2[1024];
ast_type_to_string(find, ty1, sizeof(ty1));
ast_type_to_string((ast_expression*)var, ty2, sizeof(ty2));
compile_error(parser_ctx(parser), "incompatible types `%s` and `%s` for alias `%s`",
ty1, ty2, var->name
);
return false;
}
/*
* add alias to aliases table and to corrector
* so corrections can apply for aliases as well.
*/
util_htset(parser->aliases, var->name, find);
/*
* add to corrector so corrections can work
* even for aliases too.
*/
correct_add (
vec_last(parser->correct_variables),
&vec_last(parser->correct_variables_score),
var->name
);
/* generate aliases for vector components */
if (isvector) {
char *buffer[3];
util_asprintf(&buffer[0], "%s_x", var->desc);
util_asprintf(&buffer[1], "%s_y", var->desc);
util_asprintf(&buffer[2], "%s_z", var->desc);
util_htset(parser->aliases, me[0]->name, parser_find_global(parser, buffer[0]));
util_htset(parser->aliases, me[1]->name, parser_find_global(parser, buffer[1]));
util_htset(parser->aliases, me[2]->name, parser_find_global(parser, buffer[2]));
mem_d(buffer[0]);
mem_d(buffer[1]);
mem_d(buffer[2]);
/*
* add to corrector so corrections can work
* even for aliases too.
*/
correct_add (
vec_last(parser->correct_variables),
&vec_last(parser->correct_variables_score),
me[0]->name
);
correct_add (
vec_last(parser->correct_variables),
&vec_last(parser->correct_variables_score),
me[1]->name
);
correct_add (
vec_last(parser->correct_variables),
&vec_last(parser->correct_variables_score),
me[2]->name
);
}
}
}
} else {
if (is_static) {
/* a static adds itself to be generated like any other global
* but is added to the local namespace instead
*/
char *defname = NULL;
size_t prefix_len, ln;
size_t sn, sn_size;
ln = strlen(parser->function->name);
vec_append(defname, ln, parser->function->name);
vec_append(defname, 2, "::");
/* remember the length up to here */
prefix_len = vec_size(defname);
/* Add it to the local scope */
util_htset(vec_last(parser->variables), var->name, (void*)var);
/* corrector */
correct_add (
vec_last(parser->correct_variables),
&vec_last(parser->correct_variables_score),
var->name
);
/* now rename the global */
ln = strlen(var->name);
vec_append(defname, ln, var->name);
/* if a variable of that name already existed, add the
* counter value.
* The counter is incremented either way.
*/
sn_size = vec_size(parser->function->static_names);
for (sn = 0; sn != sn_size; ++sn) {
if (strcmp(parser->function->static_names[sn], var->name) == 0)
break;
}
if (sn != sn_size) {
char *num = NULL;
int len = util_asprintf(&num, "#%u", parser->function->static_count);
vec_append(defname, len, num);
mem_d(num);
}
else
vec_push(parser->function->static_names, util_strdup(var->name));
parser->function->static_count++;
ast_value_set_name(var, defname);
/* push it to the to-be-generated globals */
vec_push(parser->globals, (ast_expression*)var);
/* same game for the vector members */
if (isvector) {
for (i = 0; i < 3; ++i) {
util_htset(vec_last(parser->variables), me[i]->name, (void*)(me[i]));
/* corrector */
correct_add(
vec_last(parser->correct_variables),
&vec_last(parser->correct_variables_score),
me[i]->name
);
vec_shrinkto(defname, prefix_len);
ln = strlen(me[i]->name);
vec_append(defname, ln, me[i]->name);
ast_member_set_name(me[i], defname);
vec_push(parser->globals, (ast_expression*)me[i]);
}
}
vec_free(defname);
} else {
vec_push(localblock->locals, var);
parser_addlocal(parser, var->name, (ast_expression*)var);
if (isvector) {
for (i = 0; i < 3; ++i) {
parser_addlocal(parser, me[i]->name, (ast_expression*)me[i]);
ast_block_collect(localblock, (ast_expression*)me[i]);
}
}
}
}
}
me[0] = me[1] = me[2] = NULL;
cleanvar = false;
/* Part 2.2
* deal with arrays
*/
if (var->expression.vtype == TYPE_ARRAY) {
if (var->expression.count != (size_t)-1) {
if (!create_array_accessors(parser, var))
goto cleanup;
}
}
else if (!localblock && !nofields &&
var->expression.vtype == TYPE_FIELD &&
var->expression.next->vtype == TYPE_ARRAY)
{
char name[1024];
ast_expression *telem;
ast_value *tfield;
ast_value *array = (ast_value*)var->expression.next;
if (!ast_istype(var->expression.next, ast_value)) {
parseerror(parser, "internal error: field element type must be an ast_value");
goto cleanup;
}
util_snprintf(name, sizeof(name), "%s##SETF", var->name);
if (!parser_create_array_field_setter(parser, array, name))
goto cleanup;
telem = ast_type_copy(ast_ctx(var), array->expression.next);
tfield = ast_value_new(ast_ctx(var), "<.type>", TYPE_FIELD);
tfield->expression.next = telem;
util_snprintf(name, sizeof(name), "%s##GETFP", var->name);
if (!parser_create_array_getter(parser, array, (ast_expression*)tfield, name)) {
ast_delete(tfield);
goto cleanup;
}
ast_delete(tfield);
}
skipvar:
if (parser->tok == ';') {
ast_delete(basetype);
if (!parser_next(parser)) {
parseerror(parser, "error after variable declaration");
return false;
}
return true;
}
if (parser->tok == ',')
goto another;
/*
if (!var || (!localblock && !nofields && basetype->expression.vtype == TYPE_FIELD)) {
*/
if (!var) {
parseerror(parser, "missing comma or semicolon while parsing variables");
break;
}
if (localblock && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
if (parsewarning(parser, WARN_LOCAL_CONSTANTS,
"initializing expression turns variable `%s` into a constant in this standard",
var->name) )
{
break;
}
}
if (parser->tok != '{' || var->expression.vtype != TYPE_FUNCTION) {
if (parser->tok != '=') {
parseerror(parser, "missing semicolon or initializer, got: `%s`", parser_tokval(parser));
break;
}
if (!parser_next(parser)) {
parseerror(parser, "error parsing initializer");
break;
}
}
else if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
parseerror(parser, "expected '=' before function body in this standard");
}
if (parser->tok == '#') {
ast_function *func = NULL;
ast_value *number = NULL;
float fractional;
float integral;
int builtin_num;
if (localblock) {
parseerror(parser, "cannot declare builtins within functions");
break;
}
if (var->expression.vtype != TYPE_FUNCTION) {
parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
break;
}
if (!parser_next(parser)) {
parseerror(parser, "expected builtin number");
break;
}
if (OPTS_FLAG(EXPRESSIONS_FOR_BUILTINS)) {
number = (ast_value*)parse_expression_leave(parser, true, false, false);
if (!number) {
parseerror(parser, "builtin number expected");
break;
}
if (!ast_istype(number, ast_value) || !number->hasvalue || number->cvq != CV_CONST)
{
ast_unref(number);
parseerror(parser, "builtin number must be a compile time constant");
break;
}
if (number->expression.vtype == TYPE_INTEGER)
builtin_num = number->constval.vint;
else if (number->expression.vtype == TYPE_FLOAT)
builtin_num = number->constval.vfloat;
else {
ast_unref(number);
parseerror(parser, "builtin number must be an integer constant");
break;
}
ast_unref(number);
fractional = modff(builtin_num, &integral);
if (builtin_num < 0 || fractional != 0) {
parseerror(parser, "builtin number must be an integer greater than zero");
break;
}
/* we only want the integral part anyways */
builtin_num = integral;
} else if (parser->tok == TOKEN_INTCONST) {
builtin_num = parser_token(parser)->constval.i;
} else {
parseerror(parser, "builtin number must be a compile time constant");
break;
}
if (var->hasvalue) {
(void)!parsewarning(parser, WARN_DOUBLE_DECLARATION,
"builtin `%s` has already been defined\n"
" -> previous declaration here: %s:%i",
var->name, ast_ctx(var).file, (int)ast_ctx(var).line);
}
else
{
func = ast_function_new(ast_ctx(var), var->name, var);
if (!func) {
parseerror(parser, "failed to allocate function for `%s`", var->name);
break;
}
vec_push(parser->functions, func);
func->builtin = -builtin_num-1;
}
if (OPTS_FLAG(EXPRESSIONS_FOR_BUILTINS)
? (parser->tok != ',' && parser->tok != ';')
: (!parser_next(parser)))
{
parseerror(parser, "expected comma or semicolon");
if (func)
ast_function_delete(func);
var->constval.vfunc = NULL;
break;
}
}
else if (var->expression.vtype == TYPE_ARRAY && parser->tok == '{')
{
if (localblock) {
/* Note that fteqcc and most others don't even *have*
* local arrays, so this is not a high priority.
*/
parseerror(parser, "TODO: initializers for local arrays");
break;
}
var->hasvalue = true;
if (!parse_array(parser, var))
break;
}
else if (var->expression.vtype == TYPE_FUNCTION && (parser->tok == '{' || parser->tok == '['))
{
if (localblock) {
parseerror(parser, "cannot declare functions within functions");
break;
}
if (proto)
ast_ctx(proto) = parser_ctx(parser);
if (!parse_function_body(parser, var))
break;
ast_delete(basetype);
for (i = 0; i < vec_size(parser->gotos); ++i)
parseerror(parser, "undefined label: `%s`", parser->gotos[i]->name);
vec_free(parser->gotos);
vec_free(parser->labels);
return true;
} else {
ast_expression *cexp;
ast_value *cval;
cexp = parse_expression_leave(parser, true, false, false);
if (!cexp)
break;
if (!localblock || is_static) {
cval = (ast_value*)cexp;
if (cval != parser->nil &&
(!ast_istype(cval, ast_value) || ((!cval->hasvalue || cval->cvq != CV_CONST) && !cval->isfield))
)
{
parseerror(parser, "initializer is non constant");
}
else
{
if (!is_static &&
!OPTS_FLAG(INITIALIZED_NONCONSTANTS) &&
qualifier != CV_VAR)
{
var->cvq = CV_CONST;
}
if (cval == parser->nil)
var->expression.flags |= AST_FLAG_INITIALIZED;
else
{
var->hasvalue = true;
if (cval->expression.vtype == TYPE_STRING)
var->constval.vstring = parser_strdup(cval->constval.vstring);
else if (cval->expression.vtype == TYPE_FIELD)
var->constval.vfield = cval;
else
memcpy(&var->constval, &cval->constval, sizeof(var->constval));
ast_unref(cval);
}
}
} else {
int cvq;
shunt sy = { NULL, NULL, NULL, NULL };
cvq = var->cvq;
var->cvq = CV_NONE;
vec_push(sy.out, syexp(ast_ctx(var), (ast_expression*)var));
vec_push(sy.out, syexp(ast_ctx(cexp), (ast_expression*)cexp));
vec_push(sy.ops, syop(ast_ctx(var), parser->assign_op));
if (!parser_sy_apply_operator(parser, &sy))
ast_unref(cexp);
else {
if (vec_size(sy.out) != 1 && vec_size(sy.ops) != 0)
parseerror(parser, "internal error: leaked operands");
if (!ast_block_add_expr(localblock, (ast_expression*)sy.out[0].out))
break;
}
vec_free(sy.out);
vec_free(sy.ops);
vec_free(sy.argc);
var->cvq = cvq;
}
}
another:
if (parser->tok == ',') {
if (!parser_next(parser)) {
parseerror(parser, "expected another variable");
break;
}
if (parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected another variable");
break;
}
var = ast_value_copy(basetype);
cleanvar = true;
ast_value_set_name(var, parser_tokval(parser));
if (!parser_next(parser)) {
parseerror(parser, "error parsing variable declaration");
break;
}
continue;
}
if (parser->tok != ';') {
parseerror(parser, "missing semicolon after variables");
break;
}
if (!parser_next(parser)) {
parseerror(parser, "parse error after variable declaration");
break;
}
ast_delete(basetype);
return true;
}
if (cleanvar && var)
ast_delete(var);
ast_delete(basetype);
return false;
cleanup:
ast_delete(basetype);
if (cleanvar && var)
ast_delete(var);
if (me[0]) ast_member_delete(me[0]);
if (me[1]) ast_member_delete(me[1]);
if (me[2]) ast_member_delete(me[2]);
return retval;
}
static bool parser_global_statement(parser_t *parser)
{
int cvq = CV_WRONG;
bool noref = false;
bool is_static = false;
uint32_t qflags = 0;
ast_value *istype = NULL;
char *vstring = NULL;
if (parser->tok == TOKEN_IDENT)
istype = parser_find_typedef(parser, parser_tokval(parser), 0);
if (istype || parser->tok == TOKEN_TYPENAME || parser->tok == '.' || parser->tok == TOKEN_DOTS)
{
return parse_variable(parser, NULL, false, CV_NONE, istype, false, false, 0, NULL);
}
else if (parse_qualifiers(parser, false, &cvq, &noref, &is_static, &qflags, &vstring))
{
if (cvq == CV_WRONG)
return false;
return parse_variable(parser, NULL, true, cvq, NULL, noref, is_static, qflags, vstring);
}
else if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "enum"))
{
return parse_enum(parser);
}
else if (parser->tok == TOKEN_KEYWORD)
{
if (!strcmp(parser_tokval(parser), "typedef")) {
if (!parser_next(parser)) {
parseerror(parser, "expected type definition after 'typedef'");
return false;
}
return parse_typedef(parser);
}
parseerror(parser, "unrecognized keyword `%s`", parser_tokval(parser));
return false;
}
else if (parser->tok == '#')
{
return parse_pragma(parser);
}
else if (parser->tok == '$')
{
if (!parser_next(parser)) {
parseerror(parser, "parse error");
return false;
}
}
else
{
parseerror(parser, "unexpected token: `%s`", parser->lex->tok.value);
return false;
}
return true;
}
static uint16_t progdefs_crc_sum(uint16_t old, const char *str)
{
return util_crc16(old, str, strlen(str));
}
static void progdefs_crc_file(const char *str)
{
/* write to progdefs.h here */
(void)str;
}
static uint16_t progdefs_crc_both(uint16_t old, const char *str)
{
old = progdefs_crc_sum(old, str);
progdefs_crc_file(str);
return old;
}
static void generate_checksum(parser_t *parser, ir_builder *ir)
{
uint16_t crc = 0xFFFF;
size_t i;
ast_value *value;
crc = progdefs_crc_both(crc, "\n/* file generated by qcc, do not modify */\n\ntypedef struct\n{");
crc = progdefs_crc_sum(crc, "\tint\tpad[28];\n");
/*
progdefs_crc_file("\tint\tpad;\n");
progdefs_crc_file("\tint\tofs_return[3];\n");
progdefs_crc_file("\tint\tofs_parm0[3];\n");
progdefs_crc_file("\tint\tofs_parm1[3];\n");
progdefs_crc_file("\tint\tofs_parm2[3];\n");
progdefs_crc_file("\tint\tofs_parm3[3];\n");
progdefs_crc_file("\tint\tofs_parm4[3];\n");
progdefs_crc_file("\tint\tofs_parm5[3];\n");
progdefs_crc_file("\tint\tofs_parm6[3];\n");
progdefs_crc_file("\tint\tofs_parm7[3];\n");
*/
for (i = 0; i < parser->crc_globals; ++i) {
if (!ast_istype(parser->globals[i], ast_value))
continue;
value = (ast_value*)(parser->globals[i]);
switch (value->expression.vtype) {
case TYPE_FLOAT: crc = progdefs_crc_both(crc, "\tfloat\t"); break;
case TYPE_VECTOR: crc = progdefs_crc_both(crc, "\tvec3_t\t"); break;
case TYPE_STRING: crc = progdefs_crc_both(crc, "\tstring_t\t"); break;
case TYPE_FUNCTION: crc = progdefs_crc_both(crc, "\tfunc_t\t"); break;
default:
crc = progdefs_crc_both(crc, "\tint\t");
break;
}
crc = progdefs_crc_both(crc, value->name);
crc = progdefs_crc_both(crc, ";\n");
}
crc = progdefs_crc_both(crc, "} globalvars_t;\n\ntypedef struct\n{\n");
for (i = 0; i < parser->crc_fields; ++i) {
if (!ast_istype(parser->fields[i], ast_value))
continue;
value = (ast_value*)(parser->fields[i]);
switch (value->expression.next->vtype) {
case TYPE_FLOAT: crc = progdefs_crc_both(crc, "\tfloat\t"); break;
case TYPE_VECTOR: crc = progdefs_crc_both(crc, "\tvec3_t\t"); break;
case TYPE_STRING: crc = progdefs_crc_both(crc, "\tstring_t\t"); break;
case TYPE_FUNCTION: crc = progdefs_crc_both(crc, "\tfunc_t\t"); break;
default:
crc = progdefs_crc_both(crc, "\tint\t");
break;
}
crc = progdefs_crc_both(crc, value->name);
crc = progdefs_crc_both(crc, ";\n");
}
crc = progdefs_crc_both(crc, "} entvars_t;\n\n");
ir->code->crc = crc;
}
parser_t *parser_create()
{
parser_t *parser;
lex_ctx_t empty_ctx;
size_t i;
parser = (parser_t*)mem_a(sizeof(parser_t));
if (!parser)
return NULL;
memset(parser, 0, sizeof(*parser));
for (i = 0; i < operator_count; ++i) {
if (operators[i].id == opid1('=')) {
parser->assign_op = operators+i;
break;
}
}
if (!parser->assign_op) {
con_err("internal error: initializing parser: failed to find assign operator\n");
mem_d(parser);
return NULL;
}
vec_push(parser->variables, parser->htfields = util_htnew(PARSER_HT_SIZE));
vec_push(parser->variables, parser->htglobals = util_htnew(PARSER_HT_SIZE));
vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
vec_push(parser->_blocktypedefs, 0);
parser->aliases = util_htnew(PARSER_HT_SIZE);
/* corrector */
vec_push(parser->correct_variables, correct_trie_new());
vec_push(parser->correct_variables_score, NULL);
empty_ctx.file = "<internal>";
empty_ctx.line = 0;
empty_ctx.column = 0;
parser->nil = ast_value_new(empty_ctx, "nil", TYPE_NIL);
parser->nil->cvq = CV_CONST;
if (OPTS_FLAG(UNTYPED_NIL))
util_htset(parser->htglobals, "nil", (void*)parser->nil);
parser->max_param_count = 1;
parser->const_vec[0] = ast_value_new(empty_ctx, "<vector.x>", TYPE_NOEXPR);
parser->const_vec[1] = ast_value_new(empty_ctx, "<vector.y>", TYPE_NOEXPR);
parser->const_vec[2] = ast_value_new(empty_ctx, "<vector.z>", TYPE_NOEXPR);
if (OPTS_OPTION_BOOL(OPTION_ADD_INFO)) {
parser->reserved_version = ast_value_new(empty_ctx, "reserved:version", TYPE_STRING);
parser->reserved_version->cvq = CV_CONST;
parser->reserved_version->hasvalue = true;
parser->reserved_version->expression.flags |= AST_FLAG_INCLUDE_DEF;
parser->reserved_version->constval.vstring = util_strdup(GMQCC_FULL_VERSION_STRING);
} else {
parser->reserved_version = NULL;
}
parser->fold = fold_init (parser);
parser->intrin = intrin_init(parser);
return parser;
}
static bool parser_compile(parser_t *parser)
{
/* initial lexer/parser state */
parser->lex->flags.noops = true;
if (parser_next(parser))
{
while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
{
if (!parser_global_statement(parser)) {
if (parser->tok == TOKEN_EOF)
parseerror(parser, "unexpected end of file");
else if (compile_errors)
parseerror(parser, "there have been errors, bailing out");
lex_close(parser->lex);
parser->lex = NULL;
return false;
}
}
} else {
parseerror(parser, "parse error");
lex_close(parser->lex);
parser->lex = NULL;
return false;
}
lex_close(parser->lex);
parser->lex = NULL;
return !compile_errors;
}
bool parser_compile_file(parser_t *parser, const char *filename)
{
parser->lex = lex_open(filename);
if (!parser->lex) {
con_err("failed to open file \"%s\"\n", filename);
return false;
}
return parser_compile(parser);
}
bool parser_compile_string(parser_t *parser, const char *name, const char *str, size_t len)
{
parser->lex = lex_open_string(str, len, name);
if (!parser->lex) {
con_err("failed to create lexer for string \"%s\"\n", name);
return false;
}
return parser_compile(parser);
}
static void parser_remove_ast(parser_t *parser)
{
size_t i;
if (parser->ast_cleaned)
return;
parser->ast_cleaned = true;
for (i = 0; i < vec_size(parser->accessors); ++i) {
ast_delete(parser->accessors[i]->constval.vfunc);
parser->accessors[i]->constval.vfunc = NULL;
ast_delete(parser->accessors[i]);
}
for (i = 0; i < vec_size(parser->functions); ++i) {
ast_delete(parser->functions[i]);
}
for (i = 0; i < vec_size(parser->fields); ++i) {
ast_delete(parser->fields[i]);
}
for (i = 0; i < vec_size(parser->globals); ++i) {
ast_delete(parser->globals[i]);
}
vec_free(parser->accessors);
vec_free(parser->functions);
vec_free(parser->globals);
vec_free(parser->fields);
for (i = 0; i < vec_size(parser->variables); ++i)
util_htdel(parser->variables[i]);
vec_free(parser->variables);
vec_free(parser->_blocklocals);
vec_free(parser->_locals);
/* corrector */
for (i = 0; i < vec_size(parser->correct_variables); ++i) {
correct_del(parser->correct_variables[i], parser->correct_variables_score[i]);
}
vec_free(parser->correct_variables);
vec_free(parser->correct_variables_score);
for (i = 0; i < vec_size(parser->_typedefs); ++i)
ast_delete(parser->_typedefs[i]);
vec_free(parser->_typedefs);
for (i = 0; i < vec_size(parser->typedefs); ++i)
util_htdel(parser->typedefs[i]);
vec_free(parser->typedefs);
vec_free(parser->_blocktypedefs);
vec_free(parser->_block_ctx);
vec_free(parser->labels);
vec_free(parser->gotos);
vec_free(parser->breaks);
vec_free(parser->continues);
ast_value_delete(parser->nil);
ast_value_delete(parser->const_vec[0]);
ast_value_delete(parser->const_vec[1]);
ast_value_delete(parser->const_vec[2]);
if (parser->reserved_version)
ast_value_delete(parser->reserved_version);
util_htdel(parser->aliases);
fold_cleanup(parser->fold);
intrin_cleanup(parser->intrin);
}
void parser_cleanup(parser_t *parser)
{
parser_remove_ast(parser);
mem_d(parser);
}
static bool parser_set_coverage_func(parser_t *parser, ir_builder *ir) {
size_t i;
ast_expression *expr;
ast_value *cov;
ast_function *func;
if (!OPTS_OPTION_BOOL(OPTION_COVERAGE))
return true;
func = NULL;
for (i = 0; i != vec_size(parser->functions); ++i) {
if (!strcmp(parser->functions[i]->name, "coverage")) {
func = parser->functions[i];
break;
}
}
if (!func) {
if (OPTS_OPTION_BOOL(OPTION_COVERAGE)) {
con_out("coverage support requested but no coverage() builtin declared\n");
ir_builder_delete(ir);
return false;
}
return true;
}
cov = func->vtype;
expr = (ast_expression*)cov;
if (expr->vtype != TYPE_FUNCTION || vec_size(expr->params) != 0) {
char ty[1024];
ast_type_to_string(expr, ty, sizeof(ty));
con_out("invalid type for coverage(): %s\n", ty);
ir_builder_delete(ir);
return false;
}
ir->coverage_func = func->ir_func->value;
return true;
}
bool parser_finish(parser_t *parser, const char *output)
{
size_t i;
ir_builder *ir;
bool retval = true;
if (compile_errors) {
con_out("*** there were compile errors\n");
return false;
}
ir = ir_builder_new("gmqcc_out");
if (!ir) {
con_out("failed to allocate builder\n");
return false;
}
for (i = 0; i < vec_size(parser->fields); ++i) {
ast_value *field;
bool hasvalue;
if (!ast_istype(parser->fields[i], ast_value))
continue;
field = (ast_value*)parser->fields[i];
hasvalue = field->hasvalue;
field->hasvalue = false;
if (!ast_global_codegen((ast_value*)field, ir, true)) {
con_out("failed to generate field %s\n", field->name);
ir_builder_delete(ir);
return false;
}
if (hasvalue) {
ir_value *ifld;
ast_expression *subtype;
field->hasvalue = true;
subtype = field->expression.next;
ifld = ir_builder_create_field(ir, field->name, subtype->vtype);
if (subtype->vtype == TYPE_FIELD)
ifld->fieldtype = subtype->next->vtype;
else if (subtype->vtype == TYPE_FUNCTION)
ifld->outtype = subtype->next->vtype;
(void)!ir_value_set_field(field->ir_v, ifld);
}
}
for (i = 0; i < vec_size(parser->globals); ++i) {
ast_value *asvalue;
if (!ast_istype(parser->globals[i], ast_value))
continue;
asvalue = (ast_value*)(parser->globals[i]);
if (!asvalue->uses && !asvalue->hasvalue && asvalue->expression.vtype != TYPE_FUNCTION) {
retval = retval && !compile_warning(ast_ctx(asvalue), WARN_UNUSED_VARIABLE,
"unused global: `%s`", asvalue->name);
}
if (!ast_global_codegen(asvalue, ir, false)) {
con_out("failed to generate global %s\n", asvalue->name);
ir_builder_delete(ir);
return false;
}
}
/* Build function vararg accessor ast tree now before generating
* immediates, because the accessors may add new immediates
*/
for (i = 0; i < vec_size(parser->functions); ++i) {
ast_function *f = parser->functions[i];
if (f->varargs) {
if (parser->max_param_count > vec_size(f->vtype->expression.params)) {
f->varargs->expression.count = parser->max_param_count - vec_size(f->vtype->expression.params);
if (!parser_create_array_setter_impl(parser, f->varargs)) {
con_out("failed to generate vararg setter for %s\n", f->name);
ir_builder_delete(ir);
return false;
}
if (!parser_create_array_getter_impl(parser, f->varargs)) {
con_out("failed to generate vararg getter for %s\n", f->name);
ir_builder_delete(ir);
return false;
}
} else {
ast_delete(f->varargs);
f->varargs = NULL;
}
}
}
/* Now we can generate immediates */
if (!fold_generate(parser->fold, ir))
return false;
/* before generating any functions we need to set the coverage_func */
if (!parser_set_coverage_func(parser, ir))
return false;
for (i = 0; i < vec_size(parser->globals); ++i) {
ast_value *asvalue;
if (!ast_istype(parser->globals[i], ast_value))
continue;
asvalue = (ast_value*)(parser->globals[i]);
if (!(asvalue->expression.flags & AST_FLAG_INITIALIZED))
{
if (asvalue->cvq == CV_CONST && !asvalue->hasvalue)
(void)!compile_warning(ast_ctx(asvalue), WARN_UNINITIALIZED_CONSTANT,
"uninitialized constant: `%s`",
asvalue->name);
else if ((asvalue->cvq == CV_NONE || asvalue->cvq == CV_CONST) && !asvalue->hasvalue)
(void)!compile_warning(ast_ctx(asvalue), WARN_UNINITIALIZED_GLOBAL,
"uninitialized global: `%s`",
asvalue->name);
}
if (!ast_generate_accessors(asvalue, ir)) {
ir_builder_delete(ir);
return false;
}
}
for (i = 0; i < vec_size(parser->fields); ++i) {
ast_value *asvalue;
asvalue = (ast_value*)(parser->fields[i]->next);
if (!ast_istype((ast_expression*)asvalue, ast_value))
continue;
if (asvalue->expression.vtype != TYPE_ARRAY)
continue;
if (!ast_generate_accessors(asvalue, ir)) {
ir_builder_delete(ir);
return false;
}
}
if (parser->reserved_version &&
!ast_global_codegen(parser->reserved_version, ir, false))
{
con_out("failed to generate reserved::version");
ir_builder_delete(ir);
return false;
}
for (i = 0; i < vec_size(parser->functions); ++i) {
ast_function *f = parser->functions[i];
if (!ast_function_codegen(f, ir)) {
con_out("failed to generate function %s\n", f->name);
ir_builder_delete(ir);
return false;
}
}
generate_checksum(parser, ir);
if (OPTS_OPTION_BOOL(OPTION_DUMP))
ir_builder_dump(ir, con_out);
for (i = 0; i < vec_size(parser->functions); ++i) {
if (!ir_function_finalize(parser->functions[i]->ir_func)) {
con_out("failed to finalize function %s\n", parser->functions[i]->name);
ir_builder_delete(ir);
return false;
}
}
parser_remove_ast(parser);
if (compile_Werrors) {
con_out("*** there were warnings treated as errors\n");
compile_show_werrors();
retval = false;
}
if (retval) {
if (OPTS_OPTION_BOOL(OPTION_DUMPFIN))
ir_builder_dump(ir, con_out);
if (!ir_builder_generate(ir, output)) {
con_out("*** failed to generate output file\n");
ir_builder_delete(ir);
return false;
}
}
ir_builder_delete(ir);
return retval;
}
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