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quakeforge/tools/qfcc/source/qc-lex.l

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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
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
#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 "qfcc.h"
#include "expr.h"
#include "class.h"
#include "immediate.h"
#include "options.h"
#include "struct.h"
#include "type.h"
#include "qc-parse.h"
#ifndef YY_PROTO
# define YY_PROTO(x) x
#else
# define YY_FLEX_REALLOC_HACK
#endif
int yyget_lineno (void);
FILE *yyget_in (void);
FILE *yyget_out (void);
int yyget_leng (void);
char *yyget_text (void);
void yyset_lineno (int line_number);
void yyset_in (FILE * in_str);
void yyset_out (FILE * out_str);
int yyget_debug (void);
void yyset_debug (int bdebug);
int yylex_destroy (void);
#define YY_NO_UNPUT
#define YY_DECL int yylex YY_PROTO(( void ))
YY_DECL;
int type_or_name (char *token);
int do_grab (char *token);
void add_frame_macro (char *token);
const char *make_string (char *token, char **end);
void push_source_file (void);
void pop_source_file (void);
void line_info (char *text);
extern YYSTYPE yylval;
%}
DIGIT [0-9]
XDIGIT [0-9a-fA-F]
ID [a-zA-Z_][a-zA-Z_0-9]*
FLOAT {DIGIT}+"."{DIGIT}*
NUM ({DIGIT}+("."{DIGIT}*)?)
s [ \t]
m ([\-+]?)
FRAMEID {ID}(\.{ID})*
%x grab_frame grab_other comment
%%
"/*" { 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}+{DIGIT}+{s}+\"(\.|[^"\n])*\".*$ { line_info (yytext + 1); }
^#line{s}+{DIGIT}+{s}+\"(\.|[^"\n])*\".*$ { line_info (yytext + 5); }
^{s}*#{s}*pragma.*$ /* skip */
{DIGIT}+ {
yylval.integer_val = atoi (yytext);
return INT_VAL;
}
0[xX]{XDIGIT}+ {
const char *c = yytext + 2;
yylval.integer_val = 0;
while (*c) {
yylval.integer_val *= 16;
yylval.integer_val += *c - '0';
if (*c > '9')
yylval.integer_val -= 'A' - '9' - 1;
if (*c > 'F')
yylval.integer_val -= 'a' - 'A';
c++;
}
return INT_VAL;
}
{FLOAT}* {
yylval.float_val = atof (yytext);
return FLOAT_VAL;
}
{ID} return type_or_name(yytext);
@{ID} {
int tok = type_or_name(yytext);
if (tok == '@')
REJECT;
return tok;
}
@ return '@';
\"(\\.|[^"\\])*\" {
yylval.string_val = make_string (yytext, 0);
return STRING_VAL;
}
'{s}*{m}{NUM}{s}+{m}{NUM}{s}+{m}{NUM}{s}*' {
sscanf (yytext, "' %f %f %f '",
&yylval.vector_val[0], &yylval.vector_val[1],
&yylval.vector_val[2]);
return VECTOR_VAL;
}
'{s}*{m}{NUM}{s}+{m}{NUM}{s}+{m}{NUM}{s}+{m}{NUM}{s}*' {
sscanf (yytext, "' %f %f %f %f '",
&yylval.quaternion_val[0],
&yylval.quaternion_val[1],
&yylval.quaternion_val[2],
&yylval.quaternion_val[3]);
return QUATERNION_VAL;
}
'(\\[^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");
yylval.integer_val = *str;
return INT_VAL;
}
[+\-*/&|^%]= {
yylval.op = yytext[0];
return ASX;
}
"<<=" {
yylval.op = SHL;
return ASX;
}
">>=" {
yylval.op = SHR;
return ASX;
}
[!(){}.*/&|^~+\-=\[\];,#%?:] {
return yytext[0];
}
"..." return ELLIPSIS;
"<<" return SHL;
">>" return SHR;
"&&" return AND;
"||" return OR;
"==" return EQ;
"!=" return NE;
"<=" return LE;
">=" return GE;
"<" return LT;
">" return GT;
"++" {
yylval.op = '+';
return INCOP;
}
"--" {
yylval.op = '-';
return INCOP;
}
"$"{s}*{FRAMEID} {
int ret = do_grab (yytext);
if (ret > 0)
return ret;
else
BEGIN (-ret);
}
<grab_frame>{FRAMEID} add_frame_macro (yytext);
<grab_other>[^\r\n]* /* skip */
<*>\r*\n {
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;
unsigned int traditional;
unsigned int version;
} keyword_t;
static keyword_t keywords[] = {
{"void", TYPE, &type_void, 1, PROG_ID_VERSION},
{"float", TYPE, &type_float, 1, PROG_ID_VERSION},
{"string", TYPE, &type_string, 1, PROG_ID_VERSION},
{"vector", TYPE, &type_vector, 1, PROG_ID_VERSION},
{"entity", TYPE, &type_entity, 1, PROG_ID_VERSION},
{"quaternion", TYPE, &type_quaternion, 0, PROG_VERSION},
{"integer", TYPE, &type_integer, 0, PROG_VERSION},
{"unsigned", TYPE, &type_uinteger, 0, PROG_VERSION},
{"function", TYPE, &type_function, 0, PROG_VERSION},
{"id", TYPE, &type_id, 0, PROG_VERSION},
{"Class", TYPE, &type_Class, 0, PROG_VERSION},
// {"Protocol", TYPE, &type_Protocol, 0, PROG_VERSION},
{"Method", TYPE, &type_Method, 0, PROG_VERSION},
{"Super", TYPE, &type_Super, 0, PROG_VERSION},
{"SEL", TYPE, &type_SEL, 0, PROG_VERSION},
{"IMP", TYPE, &type_IMP, 0, PROG_VERSION},
{"local", LOCAL, 0, 1, PROG_ID_VERSION},
{"return", RETURN, 0, 1, PROG_ID_VERSION},
{"while", WHILE, 0, 1, PROG_ID_VERSION},
{"do", DO, 0, 1, PROG_ID_VERSION},
{"if", IF, 0, 1, PROG_ID_VERSION},
{"else", ELSE, 0, 1, PROG_ID_VERSION},
{"for", FOR, 0, 0, PROG_ID_VERSION},
{"break", BREAK, 0, 1, PROG_ID_VERSION},
{"continue", CONTINUE, 0, 0, PROG_ID_VERSION},
{"switch", SWITCH, 0, 0, PROG_ID_VERSION},
{"case", CASE, 0, 0, PROG_ID_VERSION},
{"default", DEFAULT, 0, 0, PROG_ID_VERSION},
{"NIL", NIL, 0, 0, PROG_ID_VERSION},
{"struct", STRUCT, 0, 0, PROG_VERSION},
{"union", UNION, 0, 0, PROG_VERSION},
{"enum", ENUM, 0, 0, PROG_ID_VERSION},
{"typedef", TYPEDEF, 0, 0, PROG_ID_VERSION},
{"super", SUPER, 0, 0, PROG_VERSION},
{"@class", CLASS, 0, 0, PROG_VERSION},
{"@defs", DEFS, 0, 0, PROG_VERSION},
{"@encode", ENCODE, 0, 0, PROG_VERSION},
{"@end", END, 0, 0, PROG_VERSION},
{"@implementation", IMPLEMENTATION, 0, 0, PROG_VERSION},
{"@interface", INTERFACE, 0, 0, PROG_VERSION},
{"@private", PRIVATE, 0, 0, PROG_VERSION},
{"@protected", PROTECTED, 0, 0, PROG_VERSION},
{"@protocol", PROTOCOL, 0, 0, PROG_VERSION},
{"@public", PUBLIC, 0, 0, PROG_VERSION},
{"@selector", SELECTOR, 0, 0, PROG_VERSION},
{"@self", SELF, 0, 0, PROG_VERSION},
{"@this", THIS, 0, 0, PROG_VERSION},
{"@args", ARGS, 0, 0, PROG_VERSION},
{"@argc", ARGC, 0, 0, PROG_VERSION},
{"@argv", ARGV, 0, 0, PROG_VERSION},
{"@va_list", TYPE, &type_va_list, 0, PROG_VERSION},
{"@param", TYPE, &type_param, 0, PROG_VERSION},
{"@extern", EXTERN, 0, 1, PROG_ID_VERSION},
{"@static", STATIC, 0, 1, PROG_ID_VERSION},
{"@system", SYSTEM, 0, 1, PROG_ID_VERSION},
{"@sizeof", SIZEOF, 0, 0, PROG_VERSION},
{"@overload", OVERLOAD, 0, 0, PROG_VERSION},
};
static const char *
keyword_get_key (void *kw, void *unused)
{
return ((keyword_t*)kw)->name;
}
int
type_or_name (char *token)
{
static hashtab_t *keyword_tab;
keyword_t *keyword;
typedef_t *typename;
class_t *class;
if (!keyword_tab) {
size_t i;
keyword_tab = Hash_NewTable (1021, keyword_get_key, 0, 0);
for (i = 0; i < sizeof (keywords) / sizeof (keywords[0]); i++)
if (keywords[i].traditional >= options.traditional
&& keywords[i].version <= options.code.progsversion)
Hash_Add (keyword_tab, &keywords[i]);
}
keyword = Hash_Find (keyword_tab, token);
if (keyword) {
if (!options.traditional && token[0] == '@'
&& !class_Class.super_class)
class_init ();
yylval.type = keyword->type;
return keyword->value;
}
if (token[0] == '@') {
return '@';
}
if ((typename = get_typedef (token))) {
yylval.typename = typename;
return TYPE_NAME;
}
if ((class = get_class (token, 0))) {
yylval.string_val = save_string (token);
return CLASS_NAME;
}
yylval.string_val = save_string (token);
return NAME;
}
static hashtab_t *frame_tab;
static hashtab_t *grab_tab;
typedef struct frame_s {
struct frame_s *next;
const char *name;
int num;
} frame_t;
static frame_t *free_frames;
static frame_t grab_list[] = {
{0, "cd", 0},
{0, "origin", 0},
{0, "base", 0},
{0, "flags", 0},
{0, "scale", 0},
{0, "skin", 0},
};
static const char *
frame_get_key (void *f, void *unused)
{
return ((frame_t*)f)->name;
}
static void
frame_free (void *_f, void *unused)
{
frame_t *f = (frame_t *)_f;
f->next = free_frames;
free_frames = f;
}
int
do_grab (char *token)
{
static int initialized;
frame_t *frame;
if (!initialized) {
size_t i;
initialized = 1;
frame_tab = Hash_NewTable (1021, frame_get_key, frame_free, 0);
grab_tab = Hash_NewTable (1021, frame_get_key, 0, 0);
for (i = 0; i < sizeof (grab_list) / sizeof (grab_list[0]); i++)
Hash_Add (grab_tab, &grab_list[i]);
}
while (isspace ((unsigned char)*++token))
// advance over $ and leading space
;
if (!strcmp (token, "frame"))
return -grab_frame;
if (!strcmp (token, "frame_reset")) {
clear_frame_macros ();
return -grab_other;
}
if (Hash_Find (grab_tab, token))
return -grab_other;
frame = Hash_Find (frame_tab, token);
if (frame) {
yylval.integer_val = frame->num;
return INT_VAL;
}
return 0;
}
static int frame_number;
void
add_frame_macro (char *token)
{
frame_t *frame;
if (Hash_Find (frame_tab, token)) {
warning (0, "duplicate frame macro `%s'", token);
if (options.traditional)
frame_number++;
return;
}
ALLOC (1024, frame_t, frames, frame);
frame->name = save_string (token);
frame->num = frame_number++;
Hash_Add (frame_tab, frame);
}
void
clear_frame_macros (void)
{
frame_number = 0;
if (frame_tab)
Hash_FlushTable (frame_tab);
}
const char *
make_string (char *token, char **end)
{
char s[2];
int c;
int i;
int mask;
int boldnext;
int quote;
static dstring_t *str;
if (!str)
str = dstring_newstr ();
dstring_clearstr (str);
s[1] = 0;
mask = 0x00;
boldnext = 0;
quote = *token++;
do {
c = *token++;
if (!c)
error (0, "EOF inside quote");
if (c == '\n')
error (0, "newline inside quote");
if (c == '\\') { // escape char
c = *token++;
if (!c)
error (0, "EOF inside quote");
switch (c) {
case '\\':
c = '\\';
break;
case 'n':
c = '\n';
break;
case '"':
c = '\"';
break;
case '\'':
c = '\'';
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
for (i = c = 0; i < 3
&& *token >= '0'
&& *token <= '7'; i++, token++) {
c *= 8;
c += *token - '0';
}
if (!*token)
error (0, "EOF inside quote");
break;
case 'x':
c = 0;
while (*token && isxdigit ((unsigned char)*token)) {
c *= 16;
if (*token <= '9')
c += *token - '0';
else if (*token <= 'F')
c += *token - 'A' + 10;
else
c += *token - 'a' + 10;
token++;
}
if (!*token)
error (0, "EOF inside quote");
break;
case 'a':
c = '\a';
break;
case 'b':
if (options.qccx_escapes)
mask ^= 0x80;
else
c = '\b';
break;
case 'e':
c = '\033';
break;
case 'f':
c = '\f';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
case '^':
if (*token == '\"')
error (0, "Unexpected end of string after \\^");
boldnext = 1;
continue;
case '[':
c = 0x90; // gold [
break;
case ']':
c = 0x91; // gold ]
break;
case '.':
c = 28; // center dot
break;
case '<':
if (options.qccx_escapes)
c = 29; // brown left end
else
mask = 0x80;
continue;
case '-':
c = 30; // brown center bit
break;
case '>':
if (options.qccx_escapes)
c = 31; // broun right end
else
mask = 0x00;
continue;
case '(':
c = 128; // left slider end
break;
case '=':
c = 129; // slider center
break;
case ')':
c = 130; // right slider end
break;
case '{':
c = 0;
while (*token && *token != '}'
&& isdigit ((unsigned char)*token)) {
c *= 10;
c += *token - '0';
}
if (!*token)
error (0, "EOF inside quote");
if (*token != '}')
error (0, "non-digit inside \\{}");
else
token++;
if (c > 255)
warning (0, "\\{%d} > 255", c);
break;
default:
error (0, "Unknown escape char");
break;
}
} else if (c == quote) {
break;;
}
if (boldnext)
c = c ^ 0x80;
boldnext = 0;
c = c ^ mask;
s[0] = c;
dstring_appendstr (str, s);
} while (1);
if (end)
*end = token;
return save_string (str->str);
}
static srcline_t *free_srclines;
void
push_source_file (void)
{
srcline_t *srcline;
ALLOC (16, srcline_t, srclines, srcline);
srcline->source_file = pr.source_file;
srcline->source_line = pr.source_line;
srcline->next = pr.srcline_stack;
pr.srcline_stack = srcline;
}
void
pop_source_file (void)
{
srcline_t *tmp;
if (!pr.srcline_stack) {
notice (0, "unbalanced #includes. bug in preprocessor?");
return;
}
tmp = pr.srcline_stack;
pr.srcline_stack = tmp->next;
tmp->next = free_srclines;
free_srclines = tmp;
}
void
line_info (char *text)
{
char *p;
char *s;
const char *str;
int line;
int flags;
p = text;
line = strtol (p, &s, 10);
p = s;
while (isspace ((unsigned char)*p))
p++;
if (!*p)
error (0, "Unexpected end of file");
str = make_string (p, &s); // grab the filename
p = s;
while (isspace ((unsigned char) *p))
p++;
flags = strtol (p, &s, 10);
switch (flags) {
case 1:
push_source_file ();
break;
case 2:
pop_source_file ();
break;
}
while (*p && *p != '\n') // ignore rest
p++;
pr.source_line = line - 1;
pr.source_file = ReuseString (strip_path (str));
}
#ifdef YY_FLEX_REALLOC_HACK
static __attribute__ ((used)) void *(*const yy_flex_realloc_hack)(void *,yy_size_t) = yy_flex_realloc;
#else
static __attribute__ ((used)) void (*yyunput_hack)(int, char*) = yyunput;
static __attribute__ ((used)) int (*input_hack)(void) = input;
#endif
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