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quakeforge/tools/qfcc/source/qc-lex.l
Bill Currie 59b73353dd [qfcc] Fix integer vector constants for clang 
It seems clang loses track of the usage of the referenced unions by the
time the code leaves the switch. Due to the misoptimization, "random"
values would get into the vector constants. This puts the usages in the
same blocks as the unions, causing clang to "get it right" (though I
strongly suspect I was running into UB).
2022-08-18 18:18:19 +09:00

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%{
/*
qc-lex.l
lexer for quakec
Copyright (C) 2001 Bill Currie <bill@taniwha.org>
Author: Bill Currie <bill@taniwha.org>
Date: 2001/06/12
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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdlib.h>
#include <ctype.h>
#include <QF/dstring.h>
#include <QF/hash.h>
#include <QF/sys.h>
#include "tools/qfcc/include/class.h"
#include "tools/qfcc/include/debug.h"
#include "tools/qfcc/include/diagnostic.h"
#include "tools/qfcc/include/expr.h"
#include "tools/qfcc/include/grab.h"
#include "tools/qfcc/include/options.h"
#include "tools/qfcc/include/pragma.h"
#include "tools/qfcc/include/qfcc.h"
#include "tools/qfcc/include/shared.h"
#include "tools/qfcc/include/strpool.h"
#include "tools/qfcc/include/struct.h"
#include "tools/qfcc/include/symtab.h"
#include "tools/qfcc/include/type.h"
#include "tools/qfcc/include/value.h"
#include "tools/qfcc/source/qc-parse.h"
#ifndef YY_PROTO
# define YY_PROTO(x) x
#else
# define YY_FLEX_REALLOC_HACK
#endif
#define YY_NO_UNPUT
#define YY_DECL int yylex YY_PROTO(( void ))
YY_DECL;
int yyget_lineno (void) __attribute__((pure));
int yyget_leng (void) __attribute__((pure));
int yywrap (void) __attribute__((const));
char *yyget_text (void) __attribute__((pure));
int yyget_debug (void) __attribute__((pure));
FILE *yyget_in (void) __attribute__((pure));
FILE *yyget_out (void) __attribute__((pure));
static int keyword_or_id (const char *token);
static expr_t *parse_float_vector (const char *token, int width);
static expr_t *parse_int_vector (const char *token, int width);
extern QC_YYSTYPE qc_yylval;
%}
s [ \t]
m [\-+]
D [0-9]
B [01]
X [0-9a-fA-F]
ID [a-zA-Z_][a-zA-Z_0-9]*
FLOAT ({D}+|{D}*\.{D}+|{D}+\.{D}*)([eE]{m}?{D}+)?
FLOATf {FLOAT}[fF]
FLOATd {FLOAT}[dD]
FCOMP {m}?{FLOAT}
FD [fFdD]
INT ({D}+|0[xX]{X}+|0[bB]{B})
ICOMP {m}?{INT}
UL ([uU]?([lL][lL]?)?)
ULFD ({UL}|{FD})
RANGE \.\.
ELLIPSIS \.\.\.
FRAMEID {ID}(\.{ID})*
PRAGMAID {ID}(-{ID})*
STRING \"(\\.|[^"\\])*\"
%x GRAB_FRAME GRAB_OTHER GRAB_WRITE COMMENT PRAGMA
%%
grab_frame = GRAB_FRAME;
grab_other = GRAB_OTHER;
grab_write = GRAB_WRITE;
"/*" { BEGIN (COMMENT); }
<COMMENT>"/*" { warning (0, "nested /* in comment"); }
<COMMENT>"*/" { BEGIN (INITIAL); }
<COMMENT>\r*\n { pr.source_line++; }
<COMMENT>. /* nothing to do */
<COMMENT><<EOF>> { error (0, "EOF in comment"); return 0; }
"//".* /* nothing to do */
^#{s}+{D}+{s}+\"(\.|[^"\n])*\".*$ { line_info (yytext + 1); }
^#line{s}+{D}+{s}+\"(\.|[^"\n])*\".*$ { line_info (yytext + 5); }
^{s}*#{s}*pragma{s}+ { BEGIN (PRAGMA); }
{INT}+{UL}? {
const char *c = yytext + yyleng - 1;
pr_long_t i;
if (yytext[0] == '0' && tolower (yytext[1] == 'b'))
i = strtol (yytext + 2, 0, 2);
else
i = strtol (yytext, 0, 0);
if (tolower (*c) == 'u') {
if (tolower (c[1]) == 'l') {
qc_yylval.expr = new_ulong_expr (i);
} else {
qc_yylval.expr = new_uint_expr (i);
}
} else {
if (tolower (c[1]) == 'l') {
qc_yylval.expr = new_long_expr (i);
} else {
qc_yylval.expr = new_int_expr (i);
qc_yylval.expr->implicit = 1;
}
}
return VALUE;
}
{FLOAT} {
// advanced code defaults to double, but traditional
// and extended code defaults to float
if (options.traditional < 1) {
double d = strtod (yytext, 0);
qc_yylval.expr = new_double_expr (d);
qc_yylval.expr->implicit = 1;
} else {
float f = strtof (yytext, 0);
qc_yylval.expr = new_float_expr (f);
}
return VALUE;
}
{FLOATf} {
float f = strtof (yytext, 0);
qc_yylval.expr = new_float_expr (f);
return VALUE;
}
{FLOATd} {
// advanced code defaults to double, but traditional
// and extended code defaults to float
if (options.traditional < 1) {
double d = strtod (yytext, 0);
qc_yylval.expr = new_double_expr (d);
} else {
float f = strtof (yytext, 0);
qc_yylval.expr = new_float_expr (f);
warning (0, "truncating double constant to float");
}
return VALUE;
}
{ID} {
int tok = keyword_or_id(yytext);
return tok;
}
@{ID} {
int tok = keyword_or_id(yytext);
if (tok == '@')
REJECT;
return tok;
}
{STRING} {
const char *s = make_string (yytext, 0);
qc_yylval.expr = new_string_expr (s);
return STRING;
}
@ return '@';
'{s}*{ICOMP}{s}+{ICOMP}{s}*'{ULFD}? {
qc_yylval.expr = parse_int_vector (yytext, 2);
return VALUE;
}
'{s}*{ICOMP}{s}+{ICOMP}{s}+{ICOMP}{s}*'{ULFD}? {
qc_yylval.expr = parse_int_vector (yytext, 3);
return VALUE;
}
'{s}*{ICOMP}{s}+{ICOMP}{s}+{ICOMP}{s}+{ICOMP}{s}*'{ULFD}? {
qc_yylval.expr = parse_int_vector (yytext, 4);
return VALUE;
}
'{s}*{FCOMP}{s}+{FCOMP}{s}*'{FD}? {
qc_yylval.expr = parse_float_vector (yytext, 2);
return VALUE;
}
'{s}*{FCOMP}{s}+{FCOMP}{s}+{FCOMP}{s}*'{FD}? {
qc_yylval.expr = parse_float_vector (yytext, 3);
return VALUE;
}
'{s}*{FCOMP}{s}+{FCOMP}{s}+{FCOMP}{s}+{FCOMP}{s}*'{FD}? {
qc_yylval.expr = parse_float_vector (yytext, 4);
return VALUE;
}
'(\\[^xX0-7\r\n]|[^'\r\n]|\\[xX][0-9A-Fa-f]+|\\[0-7]+)*' {
const char *str = make_string (yytext, 0);
if (str[1])
warning (0, "multibyte char constant");
qc_yylval.expr = new_int_expr (*str);
return VALUE;
}
[+\-*/&|^%]= {
qc_yylval.op = yytext[0];
return ASX;
}
"%%=" {
qc_yylval.op = MOD;
return ASX;
}
"<<=" {
qc_yylval.op = SHL;
return ASX;
}
">>=" {
qc_yylval.op = SHR;
return ASX;
}
[!(){}.*/&|^~+\-=\[\];,#%?:] {
qc_yylval.pointer = 0; // ensure pointer vals are null
return yytext[0];
}
"%%" {
qc_yylval.pointer = 0; // ensure pointer vals are null
return MOD;
}
{ELLIPSIS} return ELLIPSIS;
"<<" return SHL;
">>" return SHR;
"&&" return AND;
"||" return OR;
"==" return EQ;
"!=" return NE;
"<=" return LE;
">=" return GE;
"<" return LT;
">" return GT;
"++" {
qc_yylval.op = '+';
return INCOP;
}
"--" {
qc_yylval.op = '-';
return INCOP;
}
"$"{s}*{FRAMEID} {
int ret = do_grab (yytext);
if (ret >= 0) {
qc_yylval.expr = new_int_expr (ret);
return VALUE;
} else {
BEGIN (-ret);
}
}
<GRAB_FRAME>{FRAMEID} add_frame_macro (yytext);
<GRAB_OTHER>[^\r\n]* /* skip */
<GRAB_WRITE>{STRING} {
const char *s = make_string (yytext, 0);
write_frame_macros (s);
BEGIN (GRAB_OTHER); // ignore rest of line
}
<PRAGMA>{ID} { pragma_add_arg (yytext); }
<PRAGMA>@{ID} { pragma_add_arg (yytext); }
<*>\r*\n {
if (YY_START == PRAGMA) {
pragma_process ();
}
pr.source_line++;
BEGIN (INITIAL);
}
<*>{s}* /* skip */
<*>. error (0, "all your typo are belong to us");
%%
int
yywrap (void)
{
return 1;
}
typedef struct {
const char *name;
int value;
type_t *type;
} keyword_t;
// These keywords are part of the Ruamoko language and require the QuakeForge
// Ruamoko VM.
static keyword_t rua_keywords[] = {
#define VEC_TYPE(type_name, base_type) { #type_name, TYPE, &type_##type_name },
#include "tools/qfcc/include/vec_types.h"
};
// These keywords are all part of the Ruamoko (Objective-QC) language.
// The first time any one of them is encountered, the class system will be
// initialized.
// If not compiling for the QuakeForge VM, or if Ruamoko has been disabled,
// then they will be unavailable as keywords.
static keyword_t obj_keywords[] = {
{"id", OBJECT, &type_id },
{"Class", TYPE, &type_Class },
{"Method", TYPE, &type_method },
{"Super", TYPE, &type_super },
{"SEL", TYPE, &type_SEL },
{"IMP", TYPE, &type_IMP },
{"@class", CLASS },
{"@defs", DEFS },
{"@encode", ENCODE },
{"@end", END },
{"@implementation", IMPLEMENTATION },
{"@interface", INTERFACE },
{"@private", PRIVATE },
{"@protected", PROTECTED },
{"@protocol", PROTOCOL },
{"@public", PUBLIC },
{"@reference", REFERENCE },
{"@selector", SELECTOR },
{"@self", SELF },
{"@this", THIS },
// This is a hack to trigger the initialization of the class
// sytem if it is seen before any other Objective-QC symbol. Otherwise,
// it is just an identifier, though it does reference a built-in type
// created by the class system.
{"obj_module", 0 },
};
// These keywords are extensions to QC and thus available only in advanced
// or extended code. However, if they are preceeded by an @ (eg, @for), then
// they are always available. This is to prevent them from causing trouble
// for traditional code that might use these words as identifiers, but still
// make the language features available to traditional code.
static keyword_t at_keywords[] = {
{"for", FOR },
{"goto", GOTO },
{"break", BREAK },
{"continue", CONTINUE},
{"switch", SWITCH },
{"case", CASE },
{"default", DEFAULT },
{"nil", NIL },
{"struct", STRUCT },
{"union", STRUCT },
{"enum", ENUM },
{"typedef", TYPEDEF },
{"extern", EXTERN },
{"static", STATIC },
{"sizeof", SIZEOF },
{"not", NOT },
};
// These keywords require the QuakeForge VM to be of any use. ie, they cannot
// be supported (sanely) by v6 progs.
static keyword_t qf_keywords[] = {
{"quaternion", TYPE, &type_quaternion},
{"double", TYPE, &type_double},
{"int", TYPE, &type_int },
{"unsigned", UNSIGNED, 0 },
{"signed", SIGNED, 0 },
{"long", LONG, 0 },
{"short", SHORT, 0 },
{"@function", TYPE, &type_func },
{"@args", ARGS, 0 },
{"@va_list", TYPE, &type_va_list },
{"@param", TYPE, &type_param },
{"@return", AT_RETURN, 0 },
{"@cross", CROSS, 0 },
{"@dot", DOT, 0 },
};
// These keywors are always available. Other than the @ keywords, they
// form traditional QuakeC.
static keyword_t keywords[] = {
{"void", TYPE, &type_void },
{"float", TYPE, &type_float },
{"string", TYPE, &type_string},
{"vector", TYPE, &type_vector},
{"entity", TYPE, &type_entity},
{"local", LOCAL, 0 },
{"return", RETURN, 0 },
{"while", WHILE, 0 },
{"do", DO, 0 },
{"if", IF, 0 },
{"else", ELSE, 0 },
{"@system", SYSTEM, 0 },
{"@overload", OVERLOAD, 0 },
{"@attribute", ATTRIBUTE, 0 },
};
static const char *
keyword_get_key (const void *kw, void *unused)
{
return ((keyword_t*)kw)->name;
}
static int
process_keyword (keyword_t *keyword, const char *token)
{
if (keyword->value == STRUCT) {
qc_yylval.op = token[0];
} else if (keyword->value == OBJECT) {
symbol_t *sym;
sym = symtab_lookup (current_symtab, token);
qc_yylval.symbol = sym;
// the global id symbol is always just a name so attempts to redefine
// it globally can be caught and treated as an error, but it needs to
// be redefinable when in an enclosing scope.
if (sym->sy_type == sy_name) {
// this is the global id (object)
return OBJECT;
} else if (sym->sy_type == sy_type) {
// id has been redeclared via a typedef
return TYPE_NAME;
}
// id has been redelcared as a variable (hopefully)
return NAME;
} else {
qc_yylval.type = keyword->type;
}
return keyword->value;
}
static int
keyword_or_id (const char *token)
{
static hashtab_t *keyword_tab;
static hashtab_t *qf_keyword_tab;
static hashtab_t *at_keyword_tab;
static hashtab_t *obj_keyword_tab;
static hashtab_t *rua_keyword_tab;
keyword_t *keyword = 0;
symbol_t *sym;
if (!keyword_tab) {
size_t i;
keyword_tab = Hash_NewTable (253, keyword_get_key, 0, 0, 0);
qf_keyword_tab = Hash_NewTable (253, keyword_get_key, 0, 0, 0);
at_keyword_tab = Hash_NewTable (253, keyword_get_key, 0, 0, 0);
obj_keyword_tab = Hash_NewTable (253, keyword_get_key, 0, 0, 0);
rua_keyword_tab = Hash_NewTable (253, keyword_get_key, 0, 0, 0);
#define NUMKEYS(_k) (sizeof (_k) / sizeof (_k[0]))
for (i = 0; i < NUMKEYS(keywords); i++)
Hash_Add (keyword_tab, &keywords[i]);
for (i = 0; i < NUMKEYS(qf_keywords); i++)
Hash_Add (qf_keyword_tab, &qf_keywords[i]);
for (i = 0; i < NUMKEYS(at_keywords); i++)
Hash_Add (at_keyword_tab, &at_keywords[i]);
for (i = 0; i < NUMKEYS(obj_keywords); i++)
Hash_Add (obj_keyword_tab, &obj_keywords[i]);
for (i = 0; i < NUMKEYS(rua_keywords); i++)
Hash_Add (rua_keyword_tab, &rua_keywords[i]);
}
if (options.traditional < 1) {
if (options.code.progsversion == PROG_VERSION) {
keyword = Hash_Find (rua_keyword_tab, token);
}
if (!keyword) {
keyword = Hash_Find (obj_keyword_tab, token);
if (keyword) {
if (!obj_initialized)
class_init ();
}
}
if (!keyword)
keyword = Hash_Find (qf_keyword_tab, token);
}
if (!keyword && options.traditional < 2)
keyword = Hash_Find (at_keyword_tab, token);
if (!keyword && token[0] == '@') {
keyword = Hash_Find (at_keyword_tab, token + 1);
if (keyword)
token += 1;
}
if (!keyword)
keyword = Hash_Find (keyword_tab, token);
if (keyword && keyword->value)
return process_keyword (keyword, token);
if (token[0] == '@') {
return '@';
}
sym = symtab_lookup (current_symtab, token);
if (!sym)
sym = new_symbol (token);
qc_yylval.symbol = sym;
if (sym->sy_type == sy_type)
return TYPE_NAME;
if (sym->sy_type == sy_class)
return CLASS_NAME;
return NAME;
}
static expr_t *
parse_int_vector (const char *token, int width)
{
char t1 = 0, t2 = 0;
type_t *type = 0;
union {
pr_long_t l[4];
pr_type_t t[PR_SIZEOF (dvec4)];
} long_data = {};
pr_type_t *data = __builtin_choose_expr (
sizeof (pr_long_t) == sizeof (int64_t), long_data.t, (void) 0);
switch (width) {
case 4:
sscanf (token, "' %"SCNi64" %"SCNi64" %"SCNi64" %"SCNi64" '%c%c",
&long_data.l[0], &long_data.l[1],
&long_data.l[2], &long_data.l[3], &t1, &t2);
break;
case 3:
sscanf (token, "' %"SCNi64" %"SCNi64" %"SCNi64" '%c%c",
&long_data.l[0], &long_data.l[1],
&long_data.l[2], &t1, &t2);
break;
case 2:
sscanf (token, "' %"SCNi64" %"SCNi64" '%c%c",
&long_data.l[0], &long_data.l[1], &t1, &t2);
break;
}
t1 = tolower (t1);
t2 = tolower (t2);
expr_t *expr = 0;
switch (t1) {
case 'u':
if (t2 == 'l') {
type = &type_ulong;
type = vector_type (type, width);
expr = new_value_expr (new_type_value (type, data));
} else {
type = &type_uint;
union {
pr_uint_t u[4];
pr_type_t t[PR_SIZEOF (ivec4)];
} uint_data = {
.u = {
long_data.l[0],
long_data.l[1],
long_data.l[2],
long_data.l[3],
}
};
data = uint_data.t;
type = vector_type (type, width);
expr = new_value_expr (new_type_value (type, data));
}
break;
case 'l':
type = &type_long;
type = vector_type (type, width);
expr = new_value_expr (new_type_value (type, data));
break;
case 'f':
type = &type_float;
union {
pr_float_t f[4];
pr_type_t t[PR_SIZEOF (vec4)];
} float_data = {
.f = {
long_data.l[0],
long_data.l[1],
long_data.l[2],
long_data.l[3],
}
};
data = float_data.t;
type = vector_type (type, width);
expr = new_value_expr (new_type_value (type, data));
break;
case 'd':
type = &type_double;
union {
pr_double_t d[4];
pr_type_t t[PR_SIZEOF (dvec4)];
} double_data = {
.d = {
long_data.l[0],
long_data.l[1],
long_data.l[2],
long_data.l[3],
}
};
data = double_data.t;
type = vector_type (type, width);
expr = new_value_expr (new_type_value (type, data));
break;
case 0:
type = &type_int;
union {
pr_int_t i[4];
pr_type_t t[PR_SIZEOF (ivec4)];
} int_data = {
.i = {
long_data.l[0],
long_data.l[1],
long_data.l[2],
long_data.l[3],
}
};
data = int_data.t;
type = vector_type (type, width);
expr = new_value_expr (new_type_value (type, data));
break;
}
expr->implicit = !t1;
return expr;
}
static expr_t *
parse_float_vector (const char *token, int width)
{
char t = 0;
type_t *type = 0;
union {
pr_double_t d[4];
pr_type_t t[PR_SIZEOF (dvec4)];
} double_data = {};
pr_type_t *data = __builtin_choose_expr (
sizeof (pr_double_t) == sizeof (double), double_data.t, (void) 0);
switch (width) {
case 4:
sscanf (token, "' %lf %lf %lf %lf '%c",
&double_data.d[0], &double_data.d[1],
&double_data.d[2], &double_data.d[3], &t);
break;
case 3:
sscanf (token, "' %lf %lf %lf '%c",
&double_data.d[0], &double_data.d[1],
&double_data.d[1], &t);
type = (t == 'f' || t == 'F') ? &type_vec3 : &type_dvec3;
break;
case 2:
sscanf (token, "' %lf %lf '%c",
&double_data.d[0], &double_data.d[1], &t);
type = (t == 'f' || t == 'F') ? &type_vec2 : &type_dvec2;
break;
}
if (t == 'f' || t == 'F') {
volatile union {
pr_float_t f[4];
pr_type_t t[PR_SIZEOF (vec4)];
} float_data = {
.f = {
double_data.d[0],
double_data.d[1],
double_data.d[2],
double_data.d[3],
}
};
data = (pr_type_t *) float_data.t;
type = &type_float;
} else {
type = &type_double;
}
type = vector_type (type, width);
expr_t *expr = new_value_expr (new_type_value (type, data));
expr->implicit = !t;
return expr;
}
#ifdef YY_FLEX_REALLOC_HACK
static __attribute__ ((used)) void *(*const yy_flex_realloc_hack)(void *,yy_size_t) = yy_flex_realloc;
#else
#ifdef yyunput
static __attribute__ ((used)) void (*yyunput_hack)(int, char*) = yyunput;
#endif
static __attribute__ ((used)) int (*input_hack)(void) = input;
#endif
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