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quakeforge/tools/qfcc/source/expr.c
Bill Currie 3fe67eecd2 expr.c: 
it helps if one understands /why/ something is done. I think this
	might be it for the reference count tweeks
switch.c:
	o	better control over whether case ranges are built
	o	/always/ append the temp = test expression and use temp instead of
		test for the != check
	o	only ever build case ranges if the switch expression is integer
2001-11-14 06:45:31 +00:00

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/*
#FILENAME#
#DESCRIPTION#
Copyright (C) 2001 #AUTHOR#
Author: #AUTHOR#
Date: #DATE#
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
static const char rcsid[] =
"$Id$";
#include <stdlib.h>
#include <QF/mathlib.h>
#include <QF/sys.h>
#include <QF/va.h>
#include "qfcc.h"
#include "scope.h"
#include "qc-parse.h"
int lineno_base;
etype_t qc_types[] = {
ev_void, // ex_label
ev_void, // ex_block
ev_void, // ex_expr
ev_void, // ex_uexpr
ev_void, // ex_def
ev_void, // ex_temp
ev_void, // ex_nil
ev_string, // ex_string
ev_float, // ex_float
ev_vector, // ex_vector
ev_entity, // ex_entity
ev_field, // ex_field
ev_func, // ex_func
ev_pointer, // ex_pointer
ev_quaternion, // ex_quaternion
ev_integer, // ex_integer
ev_uinteger, // ex_uinteger
};
type_t *types[] = {
&type_void,
&type_string,
&type_float,
&type_vector,
&type_entity,
&type_field,
&type_function,
&type_pointer,
&type_quaternion,
&type_integer,
&type_uinteger,
};
expr_type expr_types[] = {
ex_nil, // ev_void
ex_string, // ev_string
ex_float, // ev_float
ex_vector, // ev_vector
ex_entity, // ev_entity
ex_field, // ev_field
ex_func, // ev_func
ex_pointer, // ev_pointer
ex_quaternion, // ev_quaternion
ex_integer, // ev_integer
ex_uinteger, // ev_uinteger
};
type_t *
get_type (expr_t *e)
{
switch (e->type) {
case ex_label:
return 0; // something went very wrong
case ex_nil:
return &type_void;
case ex_block:
if (e->e.block.result)
return get_type (e->e.block.result);
return &type_void;
case ex_expr:
case ex_uexpr:
return e->e.expr.type;
case ex_def:
return e->e.def->type;
case ex_temp:
return e->e.temp.type;
case ex_integer:
if (options.code.progsversion == PROG_ID_VERSION) {
e->type = ex_float;
e->e.float_val = e->e.integer_val;
}
// fall through
case ex_string:
case ex_float:
case ex_vector:
case ex_entity:
case ex_field:
case ex_func:
case ex_pointer:
case ex_quaternion:
case ex_uinteger:
return types[qc_types[e->type]];
}
return 0;
}
etype_t
extract_type (expr_t *e)
{
type_t *type = get_type (e);
if (type)
return type->type;
return ev_type_count;
}
expr_t *
error (expr_t *e, const char *fmt, ...)
{
va_list args;
string_t file = s_file;
int line = pr_source_line;
va_start (args, fmt);
if (e) {
file = e->file;
line = e->line;
}
fprintf (stderr, "%s:%d: ", strings + file, line);
vfprintf (stderr, fmt, args);
fputs ("\n", stderr);
va_end (args);
pr_error_count++;
if (e) {
e = new_expr ();
e->type = ex_integer;
}
return e;
}
void
warning (expr_t *e, const char *fmt, ...)
{
va_list args;
string_t file = s_file;
int line = pr_source_line;
if (options.warnings.promote) {
options.warnings.promote = 0; // only want to do this once
fprintf (stderr, "%s: warnings treated as errors\n", "qfcc");
pr_error_count++;
}
va_start (args, fmt);
if (e) {
file = e->file;
line = e->line;
}
fprintf (stderr, "%s:%d: warning: ", strings + file, line);
vfprintf (stderr, fmt, args);
fputs ("\n", stderr);
va_end (args);
}
const char *
get_op_string (int op)
{
switch (op) {
case OR: return "||";
case AND: return "&&";
case EQ: return "==";
case NE: return "!=";
case LE: return "<=";
case GE: return ">=";
case LT: return "<";
case GT: return ">";
case '=': return "=";
case '+': return "+";
case '-': return "-";
case '*': return "*";
case '/': return "/";
case '%': return "%";
case '&': return "&";
case '|': return "|";
case '^': return "^";
case '~': return "~";
case '!': return "!";
case SHL: return "<<";
case SHR: return ">>";
case '.': return ".";
case 'i': return "<if>";
case 'n': return "<ifnot>";
case IFBE: return "<ifbe>";
case IFB: return "<ifb>";
case IFAE: return "<ifae>";
case IFA: return "<ifa>";
case 'g': return "<goto>";
case 'r': return "<return>";
case 'b': return "<bind>";
case 's': return "<state>";
case 'c': return "<call>";
default: return "unknown";
}
}
expr_t *
type_mismatch (expr_t *e1, expr_t *e2, int op)
{
etype_t t1, t2;
t1 = extract_type (e1);
t2 = extract_type (e2);
return error (e1, "type mismatch: %s %s %s",
type_name[t1], get_op_string (op), type_name[t2]);
}
void
check_initialized (expr_t *e)
{
if (options.warnings.uninited_variable) {
if (e->type == ex_def
&& !(e->e.def->type->type == ev_func && !e->e.def->scope)
&& !e->e.def->initialized) {
warning (e, "%s may be used uninitialized", e->e.def->name);
e->e.def->initialized = 1; // only warn once
}
}
}
void
inc_users (expr_t *e)
{
if (e && e->type == ex_temp)
e->e.temp.users++;
else if (e && e->type == ex_block)
inc_users (e->e.block.result);
}
expr_t *
new_expr (void)
{
expr_t *e = calloc (1, sizeof (expr_t));
e->line = pr_source_line;
e->file = s_file;
return e;
}
static int
num_digits (int val)
{
int num = 1;
// printf ("%d ", val);
if (val < 0) {
num++;
val = -val;
}
while (val > 9) {
val /= 10;
num++;
}
// printf ("%d\n", num);
return num;
}
const char *
new_label_name (void)
{
static int label = 0;
int lnum = ++label;
const char *fname = current_func->def->name;
int len = 1 + strlen (fname) + 1 + num_digits (lnum) + 1;
char *lname = malloc (len);
if (!lname)
Sys_Error ("new_label_expr: Memory Allocation Failure\n");
sprintf (lname, "$%s_%d", fname, lnum);
return lname;
}
expr_t *
new_label_expr (void)
{
expr_t *l = new_expr ();
l->type = ex_label;
l->e.label.name = new_label_name ();
return l;
}
expr_t *
new_block_expr (void)
{
expr_t *b = new_expr ();
b->type = ex_block;
b->e.block.head = 0;
b->e.block.tail = &b->e.block.head;
return b;
}
expr_t *
new_binary_expr (int op, expr_t *e1, expr_t *e2)
{
expr_t *e = new_expr ();
inc_users (e1);
inc_users (e2);
e->type = ex_expr;
e->e.expr.op = op;
e->e.expr.e1 = e1;
e->e.expr.e2 = e2;
return e;
}
expr_t *
new_unary_expr (int op, expr_t *e1)
{
expr_t *e = new_expr ();
inc_users (e1);
e->type = ex_uexpr;
e->e.expr.op = op;
e->e.expr.e1 = e1;
return e;
}
expr_t *
new_temp_def_expr (type_t *type)
{
expr_t *e = new_expr ();
e->type = ex_temp;
e->e.temp.type = type;
return e;
}
expr_t *
new_bind_expr (expr_t *e1, expr_t *e2)
{
expr_t *e;
if (!e2 || e2->type != ex_temp) {
error (e1, "internal error");
abort ();
}
//e = new_binary_expr ('b', e1, e2);
e = new_expr ();
e->type = ex_expr;
e->e.expr.op = 'b';
e->e.expr.e1 = e1;
e->e.expr.e2 = e2;
return e;
}
expr_t *
append_expr (expr_t *block, expr_t *e)
{
if (block->type != ex_block)
abort ();
if (!e)
return block;
if (e->next) {
error (e, "append_expr: expr loop detected");
abort ();
}
*block->e.block.tail = e;
block->e.block.tail = &e->next;
return block;
}
void
print_expr (expr_t *e)
{
printf (" ");
if (!e) {
printf ("(nil)");
return;
}
switch (e->type) {
case ex_label:
printf ("%s", e->e.label.name);
break;
case ex_block:
if (e->e.block.result) {
print_expr (e->e.block.result);
printf ("=");
}
printf ("{\n");
for (e = e->e.block.head; e; e = e->next) {
print_expr (e);
puts("");
}
printf ("}");
break;
case ex_expr:
print_expr (e->e.expr.e1);
if (e->e.expr.op == 'c') {
expr_t *p = e->e.expr.e2;
printf ("(");
while (p) {
print_expr (p);
if (p->next)
printf (",");
p = p->next;
}
printf (")");
} else if (e->e.expr.op == 'b') {
print_expr (e->e.expr.e1);
printf ("<-->");
print_expr (e->e.expr.e2);
} else {
print_expr (e->e.expr.e2);
printf (" %s", get_op_string (e->e.expr.op));
}
break;
case ex_uexpr:
print_expr (e->e.expr.e1);
printf (" u%s", get_op_string (e->e.expr.op));
break;
case ex_def:
if (e->e.def->name)
printf ("%s", e->e.def->name);
if (e->e.def->scope) {
printf ("<%d>", e->e.def->ofs);
} else {
printf ("[%d]", e->e.def->ofs);
}
break;
case ex_temp:
printf ("(");
print_expr (e->e.temp.expr);
printf (":");
if (e->e.temp.def) {
if (e->e.temp.def->name) {
printf("%s", e->e.temp.def->name);
} else {
printf("<%d>", e->e.temp.def->ofs);
}
} else {
printf("<>");
}
printf (":%s:%d)@", type_name [e->e.temp.type->type],
e->e.temp.users);
break;
case ex_nil:
printf ("NULL");
break;
case ex_string:
printf ("\"%s\"", e->e.string_val);
break;
case ex_float:
printf ("%g", e->e.float_val);
break;
case ex_vector:
printf ("'%g", e->e.vector_val[0]);
printf (" %g", e->e.vector_val[1]);
printf (" %g'", e->e.vector_val[2]);
break;
case ex_quaternion:
printf ("'%g", e->e.quaternion_val[0]);
printf (" %g", e->e.quaternion_val[1]);
printf (" %g", e->e.quaternion_val[2]);
printf (" %g'", e->e.quaternion_val[3]);
break;
case ex_entity:
case ex_field:
case ex_func:
case ex_pointer:
case ex_integer:
printf ("%d", e->e.integer_val);
break;
case ex_uinteger:
printf ("%d", e->e.uinteger_val);
break;
}
}
static expr_t *
do_op_string (int op, expr_t *e1, expr_t *e2)
{
int len;
char *buf;
const char *s1, *s2;
s1 = e1->e.string_val ? e1->e.string_val : "";
s2 = e2->e.string_val ? e2->e.string_val : "";
switch (op) {
case '+':
len = strlen (s1) + strlen (s2) + 1;
buf = malloc (len);
if (!buf)
Sys_Error ("do_op_string: Memory Allocation Failure\n");
strcpy (buf, s1);
strcat (buf, s2);
e1->e.string_val = buf;
break;
case LT:
e1->type = ex_integer;
e1->e.integer_val = strcmp (s1, s2) < 0;
break;
case GT:
e1->type = ex_integer;
e1->e.integer_val = strcmp (s1, s2) > 0;
break;
case LE:
e1->type = ex_integer;
e1->e.integer_val = strcmp (s1, s2) <= 0;
break;
case GE:
e1->type = ex_integer;
e1->e.integer_val = strcmp (s1, s2) >= 0;
break;
case EQ:
e1->type = ex_integer;
e1->e.integer_val = strcmp (s1, s2) == 0;
break;
case NE:
e1->type = ex_integer;
e1->e.integer_val = strcmp (s1, s2) != 0;
break;
default:
return error (e1, "invalid operand for string");
}
return e1;
}
static expr_t *
do_op_float (int op, expr_t *e1, expr_t *e2)
{
float f1, f2;
f1 = e1->e.float_val;
f2 = e2->e.float_val;
switch (op) {
case '+':
e1->e.float_val += f2;
break;
case '-':
e1->e.float_val -= f2;
break;
case '*':
e1->e.float_val *= f2;
break;
case '/':
e1->e.float_val /= f2;
break;
case '&':
e1->e.float_val = (int)f1 & (int)f2;
break;
case '|':
e1->e.float_val = (int)f1 | (int)f2;
break;
case '^':
e1->e.float_val = (int)f1 ^ (int)f2;
break;
case '%':
e1->e.float_val = (int)f1 % (int)f2;
break;
case SHL:
e1->e.float_val = (int)f1 << (int)f2;
break;
case SHR:
e1->e.float_val = (int)f1 >> (int)f2;
break;
case AND:
e1->type = ex_integer;
e1->e.integer_val = f1 && f2;
break;
case OR:
e1->type = ex_integer;
e1->e.integer_val = f1 || f2;
break;
case LT:
e1->type = ex_integer;
e1->e.integer_val = f1 < f2;
break;
case GT:
e1->type = ex_integer;
e1->e.integer_val = f1 > f2;
break;
case LE:
e1->type = ex_integer;
e1->e.integer_val = f1 <= f2;
break;
case GE:
e1->type = ex_integer;
e1->e.integer_val = f1 >= f2;
break;
case EQ:
e1->type = ex_integer;
e1->e.integer_val = f1 == f2;
break;
case NE:
e1->type = ex_integer;
e1->e.integer_val = f1 != f2;
break;
default:
return error (e1, "invalid operand for float");
}
return e1;
}
static expr_t *
do_op_vector (int op, expr_t *e1, expr_t *e2)
{
float *v1, *v2;
v1 = e1->e.vector_val;
v2 = e2->e.vector_val;
switch (op) {
case '+':
VectorAdd (v1, v2, v1);
break;
case '-':
VectorSubtract (v1, v2, v1);
break;
case '*':
e1->type = ex_float;
e1->e.float_val = DotProduct (v1, v2);
break;
case EQ:
e1->type = ex_integer;
e1->e.integer_val = (v1[0] == v2[0])
&& (v1[1] == v2[1])
&& (v1[2] == v2[2]);
break;
case NE:
e1->type = ex_integer;
e1->e.integer_val = (v1[0] == v2[0])
|| (v1[1] != v2[1])
|| (v1[2] != v2[2]);
break;
default:
return error (e1, "invalid operand for vector");
}
return e1;
}
static expr_t *
do_op_integer (int op, expr_t *e1, expr_t *e2)
{
int i1, i2;
i1 = e1->e.integer_val;
i2 = e2->e.integer_val;
switch (op) {
case '+':
e1->e.integer_val += i2;
break;
case '-':
e1->e.integer_val -= i2;
break;
case '*':
e1->e.integer_val *= i2;
break;
case '/':
warning (e2, "%d / %d == %d", i1, i2, i1 / i2);
e1->e.integer_val /= i2;
break;
case '&':
e1->e.integer_val = i1 & i2;
break;
case '|':
e1->e.integer_val = i1 | i2;
break;
case '^':
e1->e.integer_val = i1 ^ i2;
break;
case '%':
e1->e.integer_val = i1 % i2;
break;
case SHL:
e1->e.integer_val = i1 << i2;
break;
case SHR:
e1->e.integer_val = i1 >> i2;
break;
case AND:
e1->e.integer_val = i1 && i2;
break;
case OR:
e1->e.integer_val = i1 || i2;
break;
case LT:
e1->type = ex_integer;
e1->e.integer_val = i1 < i2;
break;
case GT:
e1->type = ex_integer;
e1->e.integer_val = i1 > i2;
break;
case LE:
e1->type = ex_integer;
e1->e.integer_val = i1 <= i2;
break;
case GE:
e1->type = ex_integer;
e1->e.integer_val = i1 >= i2;
break;
case EQ:
e1->type = ex_integer;
e1->e.integer_val = i1 == i2;
break;
case NE:
e1->type = ex_integer;
e1->e.integer_val = i1 != i2;
break;
default:
return error (e1, "invalid operand for integer");
}
return e1;
}
static expr_t *
do_op_huh (int op, expr_t *e1, expr_t *e2)
{
return error (e1, "funny constant");
}
static expr_t *(*do_op[]) (int op, expr_t *e1, expr_t *e2) = {
do_op_huh,
do_op_string,
do_op_float,
do_op_vector,
do_op_huh,
do_op_huh,
do_op_huh,
do_op_huh,
do_op_huh,
do_op_integer,
};
static expr_t *
binary_const (int op, expr_t *e1, expr_t *e2)
{
etype_t t1, t2;
//expr_t *e;
t1 = extract_type (e1);
t2 = extract_type (e2);
if (t1 == t2) {
return do_op[t1](op, e1, e2);
} else {
return type_mismatch (e1, e2, op);
}
}
static expr_t *
field_expr (expr_t *e1, expr_t *e2)
{
etype_t t1, t2;
expr_t *e;
t1 = extract_type (e1);
t2 = extract_type (e2);
if (t1 != ev_entity || t2 != ev_field) {
return error (e1, "type missmatch for .");
}
e = new_binary_expr ('.', e1, e2);
e->e.expr.type = (e2->type == ex_def)
? e2->e.def->type->aux_type
: e2->e.expr.type;
return e;
}
expr_t *
test_expr (expr_t *e, int test)
{
expr_t *new = 0;
check_initialized (e);
if (!test)
return unary_expr ('!', e);
switch (extract_type (e)) {
case ev_type_count:
error (e, "internal error");
abort ();
case ev_void:
error (e, "void has no value");
break;
case ev_string:
new = new_expr ();
new->type = ex_string;
break;
case ev_uinteger:
case ev_integer:
return e;
case ev_float:
if (options.code.progsversion == PROG_ID_VERSION)
return e;
new = new_expr ();
new->type = ex_float;
break;
case ev_vector:
new = new_expr ();
new->type = ex_vector;
break;
case ev_entity:
new = new_expr ();
new->type = ex_entity;
break;
case ev_field:
new = new_expr ();
new->type = ex_field;
break;
case ev_func:
new = new_expr ();
new->type = ex_func;
break;
case ev_pointer:
new = new_expr ();
new->type = ex_pointer;
break;
case ev_quaternion:
new = new_expr ();
new->type = ex_quaternion;
break;
}
new->line = e->line;
new->file = e->file;
new = binary_expr (NE, e, new);
new->line = e->line;
new->file = e->file;
return new;
}
void
convert_int (expr_t *e)
{
e->type = ex_float;
e->e.float_val = e->e.integer_val;
}
expr_t *
binary_expr (int op, expr_t *e1, expr_t *e2)
{
type_t *t1, *t2;
type_t *type = 0;
expr_t *e;
if (op != '=')
check_initialized (e1);
check_initialized (e2);
if (op == '=' && e1->type == ex_def)
PR_DefInitialized (e1->e.def);
if (e1->type == ex_block && e1->e.block.is_call
&& e2->type == ex_block && e2->e.block.is_call
&& e1->e.block.result) {
e = new_temp_def_expr (e1->e.block.result->e.def->type);
inc_users (e); // for the block itself
e1 = binary_expr ('=', e, e1);
}
if (op == '.')
return field_expr (e1, e2);
if (op == OR || op == AND) {
e1 = test_expr (e1, true);
e2 = test_expr (e2, true);
}
t1 = get_type (e1);
t2 = get_type (e2);
if (!t1 || !t2) {
error (e1, "internal error");
abort ();
}
if (e1->type == ex_integer
&& (t2 == &type_float
|| t2 == &type_vector
|| t2 == &type_quaternion)) {
convert_int (e1);
t1 = &type_float;
} else if (e2->type == ex_integer
&& (t1 == &type_float
|| t1 == &type_vector
|| t1 == &type_quaternion)) {
convert_int (e2);
t2 = &type_float;
}
if (e1->type >= ex_string && e2->type >= ex_string)
return binary_const (op, e1, e2);
if ((op == '&' || op == '|')
&& e1->type == ex_uexpr && e1->e.expr.op == '!' && !e1->paren) {
warning (e1, "ambiguous logic. Suggest explicit parentheses with expressions involving ! and %c", op);
}
if (op == '=' && t1->type != ev_void && e2->type == ex_nil) {
t2 = t1;
e2->type = expr_types[t2->type];
}
if (t1 != t2) {
switch (t1->type) {
case ev_float:
if (t2 == &type_vector && op == '*') {
type = &type_vector;
} else {
goto type_mismatch;
}
break;
case ev_vector:
if (t2 == &type_float && op == '*') {
type = &type_vector;
} else {
goto type_mismatch;
}
break;
case ev_field:
if (t1->aux_type == t2) {
type = t1->aux_type;
} else {
goto type_mismatch;
}
break;
case ev_func:
if (e1->type == ex_func && !e1->e.func_val) {
type = t2;
} else if (e2->type == ex_func && !e2->e.func_val) {
type = t1;
} else {
goto type_mismatch;
}
break;
default:
type_mismatch:
return type_mismatch (e1, e2, op);
}
} else {
type = t1;
}
if ((op >= OR && op <= GT) || op == '>' || op == '<') {
if (options.code.progsversion > PROG_ID_VERSION)
type = &type_integer;
else
type = &type_float;
} else if (op == '*' && t1 == &type_vector && t2 == &type_vector) {
type = &type_float;
}
if (op == '=' && e1->type == ex_expr && e1->e.expr.op == '.') {
type_t new;
memset (&new, 0, sizeof (new));
new.type = ev_pointer;
type = new.aux_type = e1->e.expr.type;
e1->e.expr.type = PR_FindType (&new);
}
if (!type)
error (e1, "internal error");
e = new_binary_expr (op, e1, e2);
e->e.expr.type = type;
return e;
}
expr_t *
asx_expr (int op, expr_t *e1, expr_t *e2)
{
expr_t *e = new_expr ();
*e = *e1;
return binary_expr ('=', e, binary_expr (op, e1, e2));
}
expr_t *
unary_expr (int op, expr_t *e)
{
check_initialized (e);
switch (op) {
case '-':
switch (e->type) {
case ex_label:
error (e, "internal error");
abort ();
case ex_uexpr:
if (e->e.expr.op == '-')
return e->e.expr.e1;
case ex_block:
if (!e->e.block.result)
return error (e, "invalid type for unary -");
case ex_expr:
case ex_def:
case ex_temp:
{
expr_t *n = new_unary_expr (op, e);
n->e.expr.type = (e->type == ex_def)
? e->e.def->type
: e->e.expr.type;
return n;
}
case ex_integer:
case ex_uinteger:
e->e.integer_val *= -1;
return e;
case ex_float:
e->e.float_val *= -1;
return e;
case ex_nil:
case ex_string:
case ex_entity:
case ex_field:
case ex_func:
case ex_pointer:
return error (e, "invalid type for unary -");
case ex_vector:
e->e.vector_val[0] *= -1;
e->e.vector_val[1] *= -1;
e->e.vector_val[2] *= -1;
return e;
case ex_quaternion:
e->e.quaternion_val[0] *= -1;
e->e.quaternion_val[1] *= -1;
e->e.quaternion_val[2] *= -1;
e->e.quaternion_val[3] *= -1;
return e;
}
break;
case '!':
switch (e->type) {
case ex_label:
abort ();
case ex_block:
if (!e->e.block.result)
return error (e, "invalid type for unary !");
case ex_uexpr:
case ex_expr:
case ex_def:
case ex_temp:
{
expr_t *n = new_unary_expr (op, e);
if (options.code.progsversion > PROG_ID_VERSION)
n->e.expr.type = &type_integer;
else
n->e.expr.type = &type_float;
return n;
}
case ex_nil:
return error (e, "invalid type for unary !");
case ex_integer:
case ex_uinteger:
e->e.integer_val = !e->e.integer_val;
return e;
case ex_float:
e->e.integer_val = !e->e.float_val;
e->type = ex_integer;
return e;
case ex_string:
e->e.integer_val = !e->e.string_val || !e->e.string_val[0];
e->type = ex_integer;
return e;
case ex_vector:
e->e.integer_val = !e->e.vector_val[0]
&& !e->e.vector_val[1]
&& !e->e.vector_val[2];
e->type = ex_integer;
return e;
case ex_quaternion:
e->e.integer_val = !e->e.quaternion_val[0]
&& !e->e.quaternion_val[1]
&& !e->e.quaternion_val[2]
&& !e->e.quaternion_val[3];
e->type = ex_integer;
return e;
case ex_entity:
case ex_field:
case ex_func:
case ex_pointer:
error (e, "internal error");
abort ();
}
break;
case '~':
switch (e->type) {
case ex_label:
abort ();
case ex_uexpr:
if (e->e.expr.op == '~')
return e->e.expr.e1;
case ex_block:
if (!e->e.block.result)
return error (e, "invalid type for unary -");
case ex_expr:
case ex_def:
case ex_temp:
{
expr_t *n = new_unary_expr (op, e);
type_t *t = get_type (e);
if (t != &type_integer && t != &type_float)
return error (e, "invalid type for unary ~");
n->e.expr.type = t;
return n;
}
case ex_integer:
case ex_uinteger:
e->e.integer_val = ~e->e.integer_val;
return e;
case ex_float:
e->e.float_val = ~(int)e->e.float_val;
e->type = ex_integer;
return e;
case ex_nil:
case ex_string:
case ex_vector:
case ex_quaternion:
case ex_entity:
case ex_field:
case ex_func:
case ex_pointer:
return error (e, "invalid type for unary ~");
}
break;
default:
abort ();
}
error (e, "internal error");
abort ();
}
int
has_function_call (expr_t *e)
{
switch (e->type) {
case ex_block:
if (e->e.block.is_call)
return 1;
for (e = e->e.block.head; e; e = e->next)
if (has_function_call (e))
return 1;
return 0;
case ex_expr:
if (e->e.expr.op == 'c')
return 1;
return (has_function_call (e->e.expr.e1)
|| has_function_call (e->e.expr.e2));
case ex_uexpr:
if (e->e.expr.op != 'g')
return has_function_call (e->e.expr.e1);
default:
return 0;
}
}
expr_t *
function_expr (expr_t *e1, expr_t *e2)
{
etype_t t1;
expr_t *e;
int parm_count = 0;
type_t *ftype;
int i;
expr_t *args = 0, **a = &args;
type_t *arg_types[MAX_PARMS];
expr_t *arg_exprs[MAX_PARMS][2];
int arg_expr_count = 0;
expr_t *call;
expr_t *err = 0;
t1 = extract_type (e1);
if (t1 != ev_func) {
if (e1->type == ex_def)
return error (e1, "Called object \"%s\" is not a function",
e1->e.def->name);
else
return error (e1, "Called object is not a function");
}
if (e1->type == ex_def && e2 && e2->type == ex_string) {
//FIXME eww, I hate this, but it's needed :(
//FIXME make a qc hook? :)
def_t *func = e1->e.def;
def_t *e = PR_ReuseConstant (e2, 0);
if (strncmp (func->name, "precache_sound", 14) == 0)
PrecacheSound (e, func->name[4]);
else if (strncmp (func->name, "precache_model", 14) == 0)
PrecacheModel (e, func->name[14]);
else if (strncmp (func->name, "precache_file", 13) == 0)
PrecacheFile (e, func->name[13]);
}
ftype = e1->type == ex_def
? e1->e.def->type
: e1->e.expr.type;
for (e = e2; e; e = e->next)
parm_count++;
if (parm_count > MAX_PARMS) {
return error (e1, "more than %d parameters", MAX_PARMS);
}
if (ftype->num_parms != -1) {
if (parm_count > ftype->num_parms) {
return error (e1, "too many arguments");
} else if (parm_count < ftype->num_parms) {
return error (e1, "too few arguments");
}
}
for (i = parm_count, e = e2; i > 0; i--, e = e->next) {
type_t *t = get_type (e);
if (ftype->parm_types[i - 1] == &type_float && e->type == ex_integer) {
e->type = ex_float;
e->e.float_val = e->e.integer_val;
t = &type_float;
}
if (ftype->num_parms != -1) {
if (t == &type_void) {
t = ftype->parm_types[i - 1];
e->type = expr_types[t->type];
}
if (t != ftype->parm_types[i - 1])
err = error (e, "type mismatch for parameter %d of %s",
i, e1->e.def->name);
} else {
//if (e->type == ex_integer)
// warning (e, "passing integer consant into ... function");
}
arg_types[parm_count - i] = t;
}
if (err)
return err;
call = new_block_expr ();
call->e.block.is_call = 1;
for (e = e2, i = 0; e; e = e->next, i++) {
if (has_function_call (e)) {
*a = new_temp_def_expr (arg_types[i]);
arg_exprs[arg_expr_count][0] = e;
arg_exprs[arg_expr_count][1] = *a;
arg_expr_count++;
} else {
*a = e;
}
a = &(*a)->next;
}
for (i = 0; i < arg_expr_count - 1; i++) {
append_expr (call, binary_expr ('=', arg_exprs[i][1],
arg_exprs[i][0]));
}
if (arg_expr_count) {
e = new_bind_expr (arg_exprs[arg_expr_count - 1][0],
arg_exprs[arg_expr_count - 1][1]);
inc_users (arg_exprs[arg_expr_count - 1][0]);
inc_users (arg_exprs[arg_expr_count - 1][1]);
append_expr (call, e);
}
e = new_binary_expr ('c', e1, args);
e->e.expr.type = ftype->aux_type;
append_expr (call, e);
if (ftype->aux_type != &type_void) {
expr_t *ret = new_expr ();
ret->type = ex_def;
ret->e.def = memcpy (malloc (sizeof (def_t)), &def_ret, sizeof (def_t));
if (!ret->e.def)
Sys_Error ("function_expr: Memory Allocation Failure\n");
ret->e.def->type = ftype->aux_type;
call->e.block.result = ret;
}
return call;
}
expr_t *
return_expr (function_t *f, expr_t *e)
{
if (!e) {
if (f->def->type->aux_type != &type_void)
return error (e, "return from non-void function without a value");
} else {
type_t *t = get_type (e);
if (f->def->type->aux_type == &type_void)
return error (e, "returning a value for a void function");
if (f->def->type->aux_type == &type_float && e->type == ex_integer) {
e->type = ex_float;
e->e.float_val = e->e.integer_val;
t = &type_float;
}
if (t == &type_void) {
t = f->def->type->aux_type;
e->type = expr_types[t->type];
}
if (f->def->type->aux_type != t)
return error (e, "type mismatch for return value of %s",
f->def->name);
}
return new_unary_expr ('r', e);
}
expr_t *
conditional_expr (expr_t *cond, expr_t *e1, expr_t *e2)
{
expr_t *block = new_block_expr ();
type_t *type1 = get_type (e1);
type_t *type2 = get_type (e2);
expr_t *tlabel = new_label_expr ();
expr_t *elabel = new_label_expr ();
block->e.block.result = (type1 == type2) ? new_temp_def_expr (type1) : 0;
append_expr (block, new_binary_expr ('i', test_expr (cond, 1), tlabel));
if (block->e.block.result)
append_expr (block, new_binary_expr ('=', block->e.block.result, e2));
else
append_expr (block, e2);
append_expr (block, new_unary_expr ('g', elabel));
append_expr (block, tlabel);
if (block->e.block.result)
append_expr (block, new_binary_expr ('=', block->e.block.result, e1));
else
append_expr (block, e1);
append_expr (block, elabel);
return block;
}
expr_t *
incop_expr (int op, expr_t *e, int postop)
{
expr_t *one = new_expr ();
expr_t *incop;
one->type = ex_integer; // integer constants get auto-cast to float
one->e.integer_val = 1;
incop = asx_expr (op, e, one);
if (postop) {
expr_t *temp;
type_t *type = get_type (e);
expr_t *block = new_block_expr ();
temp = new_temp_def_expr (type);
append_expr (block, binary_expr ('=', temp, e));
append_expr (block, incop);
block->e.block.result = temp;
return block;
}
return incop;
}
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