2 * TCC - Tiny C Compiler
4 * Copyright (c) 2001-2004 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 /********************************************************/
24 /* global variables */
26 ST_DATA
int tok_flags
;
27 ST_DATA
int parse_flags
;
29 ST_DATA
struct BufferedFile
*file
;
32 ST_DATA
const int *macro_ptr
;
33 ST_DATA CString tokcstr
; /* current parsed string, if any */
35 /* display benchmark infos */
36 ST_DATA
int total_lines
;
37 ST_DATA
int total_bytes
;
38 ST_DATA
int tok_ident
;
39 ST_DATA TokenSym
**table_ident
;
41 /* ------------------------------------------------------------------------- */
43 static int *macro_ptr_allocated
;
44 static const int *unget_saved_macro_ptr
;
45 static int unget_saved_buffer
[TOK_MAX_SIZE
+ 1];
46 static int unget_buffer_enabled
;
47 static TokenSym
*hash_ident
[TOK_HASH_SIZE
];
48 static char token_buf
[STRING_MAX_SIZE
+ 1];
49 /* true if isid(c) || isnum(c) */
50 static unsigned char isidnum_table
[256-CH_EOF
];
52 static const char tcc_keywords
[] =
53 #define DEF(id, str) str "\0"
58 /* WARNING: the content of this string encodes token numbers */
59 static const unsigned char tok_two_chars
[] =
61 "<=\236>=\235!=\225&&\240||\241++\244--\242==\224<<\1>>\2+=\253"
62 "-=\255*=\252/=\257%=\245&=\246^=\336|=\374->\313..\250##\266";
83 '.','.', 0xa8, // C++ token ?
84 '#','#', TOK_TWOSHARPS
,
89 struct macro_level
*prev
;
93 static void next_nomacro_spc(void);
94 static void macro_subst(
98 struct macro_level
**can_read_stream
101 ST_FUNC
void skip(int c
)
104 tcc_error("'%c' expected (got \"%s\")", c
, get_tok_str(tok
, &tokc
));
108 ST_FUNC
void expect(const char *msg
)
110 tcc_error("%s expected", msg
);
113 /* ------------------------------------------------------------------------- */
114 /* CString handling */
115 static void cstr_realloc(CString
*cstr
, int new_size
)
120 size
= cstr
->size_allocated
;
122 size
= 8; /* no need to allocate a too small first string */
123 while (size
< new_size
)
125 data
= tcc_realloc(cstr
->data_allocated
, size
);
126 cstr
->data_allocated
= data
;
127 cstr
->size_allocated
= size
;
132 ST_FUNC
void cstr_ccat(CString
*cstr
, int ch
)
135 size
= cstr
->size
+ 1;
136 if (size
> cstr
->size_allocated
)
137 cstr_realloc(cstr
, size
);
138 ((unsigned char *)cstr
->data
)[size
- 1] = ch
;
142 ST_FUNC
void cstr_cat(CString
*cstr
, const char *str
)
154 /* add a wide char */
155 ST_FUNC
void cstr_wccat(CString
*cstr
, int ch
)
158 size
= cstr
->size
+ sizeof(nwchar_t
);
159 if (size
> cstr
->size_allocated
)
160 cstr_realloc(cstr
, size
);
161 *(nwchar_t
*)(((unsigned char *)cstr
->data
) + size
- sizeof(nwchar_t
)) = ch
;
165 ST_FUNC
void cstr_new(CString
*cstr
)
167 memset(cstr
, 0, sizeof(CString
));
170 /* free string and reset it to NULL */
171 ST_FUNC
void cstr_free(CString
*cstr
)
173 tcc_free(cstr
->data_allocated
);
177 /* reset string to empty */
178 ST_FUNC
void cstr_reset(CString
*cstr
)
184 static void add_char(CString
*cstr
, int c
)
186 if (c
== '\'' || c
== '\"' || c
== '\\') {
187 /* XXX: could be more precise if char or string */
188 cstr_ccat(cstr
, '\\');
190 if (c
>= 32 && c
<= 126) {
193 cstr_ccat(cstr
, '\\');
195 cstr_ccat(cstr
, 'n');
197 cstr_ccat(cstr
, '0' + ((c
>> 6) & 7));
198 cstr_ccat(cstr
, '0' + ((c
>> 3) & 7));
199 cstr_ccat(cstr
, '0' + (c
& 7));
204 /* ------------------------------------------------------------------------- */
205 /* allocate a new token */
206 static TokenSym
*tok_alloc_new(TokenSym
**pts
, const char *str
, int len
)
208 TokenSym
*ts
, **ptable
;
211 if (tok_ident
>= SYM_FIRST_ANOM
)
212 tcc_error("memory full (symbols)");
214 /* expand token table if needed */
215 i
= tok_ident
- TOK_IDENT
;
216 if ((i
% TOK_ALLOC_INCR
) == 0) {
217 ptable
= tcc_realloc(table_ident
, (i
+ TOK_ALLOC_INCR
) * sizeof(TokenSym
*));
218 table_ident
= ptable
;
221 ts
= tcc_malloc(sizeof(TokenSym
) + len
);
223 ts
->tok
= tok_ident
++;
224 ts
->sym_define
= NULL
;
225 ts
->sym_label
= NULL
;
226 ts
->sym_struct
= NULL
;
227 ts
->sym_identifier
= NULL
;
229 ts
->hash_next
= NULL
;
230 memcpy(ts
->str
, str
, len
);
236 #define TOK_HASH_INIT 1
237 #define TOK_HASH_FUNC(h, c) ((h) * 263 + (c))
239 /* find a token and add it if not found */
240 ST_FUNC TokenSym
*tok_alloc(const char *str
, int len
)
248 h
= TOK_HASH_FUNC(h
, ((unsigned char *)str
)[i
]);
249 h
&= (TOK_HASH_SIZE
- 1);
251 pts
= &hash_ident
[h
];
256 if (ts
->len
== len
&& !memcmp(ts
->str
, str
, len
))
258 pts
= &(ts
->hash_next
);
260 return tok_alloc_new(pts
, str
, len
);
263 /* XXX: buffer overflow */
264 /* XXX: float tokens */
265 ST_FUNC
char *get_tok_str(int v
, CValue
*cv
)
267 static char buf
[STRING_MAX_SIZE
+ 1];
268 static CString cstr_buf
;
273 /* NOTE: to go faster, we give a fixed buffer for small strings */
274 cstr_reset(&cstr_buf
);
276 cstr_buf
.size_allocated
= sizeof(buf
);
279 /* just an explanation, should never happen:
280 if (v <= TOK_LINENUM && v >= TOK_CINT && cv == NULL)
281 tcc_error("internal error: get_tok_str"); */
286 /* XXX: not quite exact, but only useful for testing */
287 sprintf(p
, "%u", cv
->ui
);
291 /* XXX: not quite exact, but only useful for testing */
293 sprintf(p
, "%u", (unsigned)cv
->ull
);
295 sprintf(p
, "%llu", cv
->ull
);
299 cstr_ccat(&cstr_buf
, 'L');
301 cstr_ccat(&cstr_buf
, '\'');
302 add_char(&cstr_buf
, cv
->i
);
303 cstr_ccat(&cstr_buf
, '\'');
304 cstr_ccat(&cstr_buf
, '\0');
308 len
= cstr
->size
- 1;
310 add_char(&cstr_buf
, ((unsigned char *)cstr
->data
)[i
]);
311 cstr_ccat(&cstr_buf
, '\0');
314 cstr_ccat(&cstr_buf
, 'L');
317 cstr_ccat(&cstr_buf
, '\"');
319 len
= cstr
->size
- 1;
321 add_char(&cstr_buf
, ((unsigned char *)cstr
->data
)[i
]);
323 len
= (cstr
->size
/ sizeof(nwchar_t
)) - 1;
325 add_char(&cstr_buf
, ((nwchar_t
*)cstr
->data
)[i
]);
327 cstr_ccat(&cstr_buf
, '\"');
328 cstr_ccat(&cstr_buf
, '\0');
335 return NULL
; /* should not happen */
337 /* above tokens have value, the ones below don't */
346 return strcpy(p
, "...");
348 return strcpy(p
, "<<=");
350 return strcpy(p
, ">>=");
353 /* search in two bytes table */
354 const unsigned char *q
= tok_two_chars
;
367 } else if (v
< tok_ident
) {
368 return table_ident
[v
- TOK_IDENT
]->str
;
369 } else if (v
>= SYM_FIRST_ANOM
) {
370 /* special name for anonymous symbol */
371 sprintf(p
, "L.%u", v
- SYM_FIRST_ANOM
);
373 /* should never happen */
378 return cstr_buf
.data
;
381 /* fill input buffer and peek next char */
382 static int tcc_peekc_slow(BufferedFile
*bf
)
385 /* only tries to read if really end of buffer */
386 if (bf
->buf_ptr
>= bf
->buf_end
) {
388 #if defined(PARSE_DEBUG)
393 len
= read(bf
->fd
, bf
->buffer
, len
);
400 bf
->buf_ptr
= bf
->buffer
;
401 bf
->buf_end
= bf
->buffer
+ len
;
402 *bf
->buf_end
= CH_EOB
;
404 if (bf
->buf_ptr
< bf
->buf_end
) {
405 return bf
->buf_ptr
[0];
407 bf
->buf_ptr
= bf
->buf_end
;
412 /* return the current character, handling end of block if necessary
414 ST_FUNC
int handle_eob(void)
416 return tcc_peekc_slow(file
);
419 /* read next char from current input file and handle end of input buffer */
420 ST_INLN
void inp(void)
422 ch
= *(++(file
->buf_ptr
));
423 /* end of buffer/file handling */
428 /* handle '\[\r]\n' */
429 static int handle_stray_noerror(void)
436 } else if (ch
== '\r') {
450 static void handle_stray(void)
452 if (handle_stray_noerror())
453 tcc_error("stray '\\' in program");
456 /* skip the stray and handle the \\n case. Output an error if
457 incorrect char after the stray */
458 static int handle_stray1(uint8_t *p
)
462 if (p
>= file
->buf_end
) {
479 /* handle just the EOB case, but not stray */
480 #define PEEKC_EOB(c, p)\
491 /* handle the complicated stray case */
497 c = handle_stray1(p);\
502 /* input with '\[\r]\n' handling. Note that this function cannot
503 handle other characters after '\', so you cannot call it inside
504 strings or comments */
505 ST_FUNC
void minp(void)
513 /* single line C++ comments */
514 static uint8_t *parse_line_comment(uint8_t *p
)
522 if (c
== '\n' || c
== CH_EOF
) {
524 } else if (c
== '\\') {
533 } else if (c
== '\r') {
551 ST_FUNC
uint8_t *parse_comment(uint8_t *p
)
560 if (c
== '\n' || c
== '*' || c
== '\\')
564 if (c
== '\n' || c
== '*' || c
== '\\')
568 /* now we can handle all the cases */
572 } else if (c
== '*') {
578 } else if (c
== '/') {
580 } else if (c
== '\\') {
585 /* skip '\[\r]\n', otherwise just skip the stray */
591 } else if (c
== '\r') {
608 /* stray, eob or eof */
613 tcc_error("unexpected end of file in comment");
614 } else if (c
== '\\') {
626 static inline void skip_spaces(void)
632 static inline int check_space(int t
, int *spc
)
643 /* parse a string without interpreting escapes */
644 static uint8_t *parse_pp_string(uint8_t *p
,
645 int sep
, CString
*str
)
653 } else if (c
== '\\') {
659 /* XXX: indicate line number of start of string */
660 tcc_error("missing terminating %c character", sep
);
661 } else if (c
== '\\') {
662 /* escape : just skip \[\r]\n */
667 } else if (c
== '\r') {
670 expect("'\n' after '\r'");
673 } else if (c
== CH_EOF
) {
674 goto unterminated_string
;
677 cstr_ccat(str
, '\\');
683 } else if (c
== '\n') {
686 } else if (c
== '\r') {
690 cstr_ccat(str
, '\r');
706 /* skip block of text until #else, #elif or #endif. skip also pairs of
708 static void preprocess_skip(void)
710 int a
, start_of_line
, c
, in_warn_or_error
;
717 in_warn_or_error
= 0;
738 } else if (c
== '\\') {
739 ch
= file
->buf_ptr
[0];
740 handle_stray_noerror();
747 if (in_warn_or_error
)
749 p
= parse_pp_string(p
, c
, NULL
);
753 if (in_warn_or_error
)
760 p
= parse_comment(p
);
761 } else if (ch
== '/') {
762 p
= parse_line_comment(p
);
772 (tok
== TOK_ELSE
|| tok
== TOK_ELIF
|| tok
== TOK_ENDIF
))
774 if (tok
== TOK_IF
|| tok
== TOK_IFDEF
|| tok
== TOK_IFNDEF
)
776 else if (tok
== TOK_ENDIF
)
778 else if( tok
== TOK_ERROR
|| tok
== TOK_WARNING
)
779 in_warn_or_error
= 1;
780 else if (tok
== TOK_LINEFEED
)
782 else if (parse_flags
& PARSE_FLAG_ASM_COMMENTS
)
783 p
= parse_line_comment(p
);
785 else if (parse_flags
& PARSE_FLAG_ASM_FILE
)
786 p
= parse_line_comment(p
);
799 /* ParseState handling */
801 /* XXX: currently, no include file info is stored. Thus, we cannot display
802 accurate messages if the function or data definition spans multiple
805 /* save current parse state in 's' */
806 ST_FUNC
void save_parse_state(ParseState
*s
)
808 s
->line_num
= file
->line_num
;
809 s
->macro_ptr
= macro_ptr
;
814 /* restore parse state from 's' */
815 ST_FUNC
void restore_parse_state(ParseState
*s
)
817 file
->line_num
= s
->line_num
;
818 macro_ptr
= s
->macro_ptr
;
823 /* return the number of additional 'ints' necessary to store the
825 static inline int tok_ext_size(int t
)
839 tcc_error("unsupported token");
846 return LDOUBLE_SIZE
/ 4;
852 /* token string handling */
854 ST_INLN
void tok_str_new(TokenString
*s
)
858 s
->allocated_len
= 0;
859 s
->last_line_num
= -1;
862 ST_FUNC
void tok_str_free(int *str
)
867 static int *tok_str_realloc(TokenString
*s
)
871 if (s
->allocated_len
== 0) {
874 len
= s
->allocated_len
* 2;
876 str
= tcc_realloc(s
->str
, len
* sizeof(int));
877 s
->allocated_len
= len
;
882 ST_FUNC
void tok_str_add(TokenString
*s
, int t
)
888 if (len
>= s
->allocated_len
)
889 str
= tok_str_realloc(s
);
894 static void tok_str_add2(TokenString
*s
, int t
, CValue
*cv
)
901 /* allocate space for worst case */
902 if (len
+ TOK_MAX_SIZE
> s
->allocated_len
)
903 str
= tok_str_realloc(s
);
912 str
[len
++] = cv
->tab
[0];
921 nb_words
= (sizeof(CString
) + cv
->cstr
->size
+ 3) >> 2;
922 while ((len
+ nb_words
) > s
->allocated_len
)
923 str
= tok_str_realloc(s
);
924 cstr
= (CString
*)(str
+ len
);
926 cstr
->size
= cv
->cstr
->size
;
927 cstr
->data_allocated
= NULL
;
928 cstr
->size_allocated
= cstr
->size
;
929 memcpy((char *)cstr
+ sizeof(CString
),
930 cv
->cstr
->data
, cstr
->size
);
937 #if LDOUBLE_SIZE == 8
940 str
[len
++] = cv
->tab
[0];
941 str
[len
++] = cv
->tab
[1];
943 #if LDOUBLE_SIZE == 12
945 str
[len
++] = cv
->tab
[0];
946 str
[len
++] = cv
->tab
[1];
947 str
[len
++] = cv
->tab
[2];
948 #elif LDOUBLE_SIZE == 16
950 str
[len
++] = cv
->tab
[0];
951 str
[len
++] = cv
->tab
[1];
952 str
[len
++] = cv
->tab
[2];
953 str
[len
++] = cv
->tab
[3];
954 #elif LDOUBLE_SIZE != 8
955 #error add long double size support
964 /* add the current parse token in token string 's' */
965 ST_FUNC
void tok_str_add_tok(TokenString
*s
)
969 /* save line number info */
970 if (file
->line_num
!= s
->last_line_num
) {
971 s
->last_line_num
= file
->line_num
;
972 cval
.i
= s
->last_line_num
;
973 tok_str_add2(s
, TOK_LINENUM
, &cval
);
975 tok_str_add2(s
, tok
, &tokc
);
978 /* get a token from an integer array and increment pointer
979 accordingly. we code it as a macro to avoid pointer aliasing. */
980 static inline void TOK_GET(int *t
, const int **pp
, CValue
*cv
)
998 cv
->cstr
= (CString
*)p
;
999 cv
->cstr
->data
= (char *)p
+ sizeof(CString
);
1000 p
+= (sizeof(CString
) + cv
->cstr
->size
+ 3) >> 2;
1008 #if LDOUBLE_SIZE == 16
1010 #elif LDOUBLE_SIZE == 12
1012 #elif LDOUBLE_SIZE == 8
1015 # error add long double size support
1028 static int macro_is_equal(const int *a
, const int *b
)
1030 char buf
[STRING_MAX_SIZE
+ 1];
1034 TOK_GET(&t
, &a
, &cv
);
1035 pstrcpy(buf
, sizeof buf
, get_tok_str(t
, &cv
));
1036 TOK_GET(&t
, &b
, &cv
);
1037 if (strcmp(buf
, get_tok_str(t
, &cv
)))
1043 static void define_print(Sym
*s
, int is_undef
)
1050 if (tcc_state
->dflag
== 0 || !s
|| !tcc_state
->ppfp
)
1054 c
= file
->line_num
- file
->line_ref
- 1;
1057 fputs("\n", tcc_state
->ppfp
);
1058 file
->line_ref
= file
->line_num
;
1063 fprintf(tcc_state
->ppfp
, "// #undef %s\n", get_tok_str(s
->v
, NULL
));
1067 fprintf(tcc_state
->ppfp
, "// #define %s", get_tok_str(s
->v
, NULL
));
1072 fprintf(tcc_state
->ppfp
, "%s%s", sep
, get_tok_str(arg
->v
& ~SYM_FIELD
, NULL
));
1076 fprintf(tcc_state
->ppfp
, ")");
1081 fprintf(tcc_state
->ppfp
, " ");
1084 TOK_GET(&t
, &str
, &cval
);
1087 fprintf(tcc_state
->ppfp
, "%s", get_tok_str(t
, &cval
));
1089 fprintf(tcc_state
->ppfp
, "\n");
1092 /* defines handling */
1093 ST_INLN
void define_push(int v
, int macro_type
, int *str
, Sym
*first_arg
)
1098 if (s
&& !macro_is_equal(s
->d
, str
))
1099 tcc_warning("%s redefined", get_tok_str(v
, NULL
));
1101 s
= sym_push2(&define_stack
, v
, macro_type
, 0);
1103 s
->next
= first_arg
;
1104 table_ident
[v
- TOK_IDENT
]->sym_define
= s
;
1108 /* undefined a define symbol. Its name is just set to zero */
1109 ST_FUNC
void define_undef(Sym
*s
)
1113 if (v
>= TOK_IDENT
&& v
< tok_ident
) {
1115 table_ident
[v
- TOK_IDENT
]->sym_define
= NULL
;
1120 ST_INLN Sym
*define_find(int v
)
1123 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
1125 return table_ident
[v
]->sym_define
;
1128 /* free define stack until top reaches 'b' */
1129 ST_FUNC
void free_defines(Sym
*b
)
1137 /* do not free args or predefined defines */
1139 tok_str_free(top
->d
);
1141 if (v
>= TOK_IDENT
&& v
< tok_ident
)
1142 table_ident
[v
- TOK_IDENT
]->sym_define
= NULL
;
1149 ST_FUNC
void print_defines(void)
1157 if (v
>= TOK_IDENT
&& v
< tok_ident
) {
1158 s
= table_ident
[v
- TOK_IDENT
]->sym_define
;
1166 ST_FUNC Sym
*label_find(int v
)
1169 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
1171 return table_ident
[v
]->sym_label
;
1174 ST_FUNC Sym
*label_push(Sym
**ptop
, int v
, int flags
)
1177 s
= sym_push2(ptop
, v
, 0, 0);
1179 ps
= &table_ident
[v
- TOK_IDENT
]->sym_label
;
1180 if (ptop
== &global_label_stack
) {
1181 /* modify the top most local identifier, so that
1182 sym_identifier will point to 's' when popped */
1184 ps
= &(*ps
)->prev_tok
;
1191 /* pop labels until element last is reached. Look if any labels are
1192 undefined. Define symbols if '&&label' was used. */
1193 ST_FUNC
void label_pop(Sym
**ptop
, Sym
*slast
)
1196 for(s
= *ptop
; s
!= slast
; s
= s1
) {
1198 if (s
->r
== LABEL_DECLARED
) {
1199 tcc_warning("label '%s' declared but not used", get_tok_str(s
->v
, NULL
));
1200 } else if (s
->r
== LABEL_FORWARD
) {
1201 tcc_error("label '%s' used but not defined",
1202 get_tok_str(s
->v
, NULL
));
1205 /* define corresponding symbol. A size of
1207 put_extern_sym(s
, cur_text_section
, s
->jnext
, 1);
1211 table_ident
[s
->v
- TOK_IDENT
]->sym_label
= s
->prev_tok
;
1217 /* eval an expression for #if/#elif */
1218 static int expr_preprocess(void)
1224 while (tok
!= TOK_LINEFEED
&& tok
!= TOK_EOF
) {
1225 next(); /* do macro subst */
1226 if (tok
== TOK_DEFINED
) {
1231 c
= define_find(tok
) != 0;
1236 } else if (tok
>= TOK_IDENT
) {
1237 /* if undefined macro */
1241 tok_str_add_tok(&str
);
1243 tok_str_add(&str
, -1); /* simulate end of file */
1244 tok_str_add(&str
, 0);
1245 /* now evaluate C constant expression */
1246 macro_ptr
= str
.str
;
1250 tok_str_free(str
.str
);
1254 /* parse after #define */
1255 ST_FUNC
void parse_define(void)
1257 Sym
*s
, *first
, **ps
;
1258 int v
, t
, varg
, is_vaargs
, spc
, ptok
, macro_list_start
;
1263 tcc_error("invalid macro name '%s'", get_tok_str(tok
, &tokc
));
1264 /* XXX: should check if same macro (ANSI) */
1267 /* '(' must be just after macro definition for MACRO_FUNC */
1272 while (tok
!= ')') {
1276 if (varg
== TOK_DOTS
) {
1277 varg
= TOK___VA_ARGS__
;
1279 } else if (tok
== TOK_DOTS
&& gnu_ext
) {
1283 if (varg
< TOK_IDENT
)
1284 tcc_error( "\'%s\' may not appear in parameter list", get_tok_str(varg
, NULL
));
1285 s
= sym_push2(&define_stack
, varg
| SYM_FIELD
, is_vaargs
, 0);
1297 /* EOF testing necessary for '-D' handling */
1299 macro_list_start
= 1;
1300 while (tok
!= TOK_LINEFEED
&& tok
!= TOK_EOF
) {
1301 if (!macro_list_start
&& spc
== 2 && tok
== TOK_TWOSHARPS
)
1302 tcc_error("'##' invalid at start of macro");
1304 /* remove spaces around ## and after '#' */
1305 if (TOK_TWOSHARPS
== tok
) {
1309 } else if ('#' == tok
) {
1311 } else if (check_space(tok
, &spc
)) {
1314 tok_str_add2(&str
, tok
, &tokc
);
1317 macro_list_start
= 0;
1319 if (ptok
== TOK_TWOSHARPS
)
1320 tcc_error("'##' invalid at end of macro");
1322 --str
.len
; /* remove trailing space */
1323 tok_str_add(&str
, 0);
1324 define_push(v
, t
, str
.str
, first
);
1327 static inline int hash_cached_include(const char *filename
)
1329 const unsigned char *s
;
1333 s
= (unsigned char *) filename
;
1335 h
= TOK_HASH_FUNC(h
, *s
);
1338 h
&= (CACHED_INCLUDES_HASH_SIZE
- 1);
1342 static CachedInclude
*search_cached_include(TCCState
*s1
, const char *filename
)
1346 h
= hash_cached_include(filename
);
1347 i
= s1
->cached_includes_hash
[h
];
1351 e
= s1
->cached_includes
[i
- 1];
1352 if (0 == PATHCMP(e
->filename
, filename
))
1359 static inline void add_cached_include(TCCState
*s1
, const char *filename
, int ifndef_macro
)
1364 if (search_cached_include(s1
, filename
))
1367 printf("adding cached '%s' %s\n", filename
, get_tok_str(ifndef_macro
, NULL
));
1369 e
= tcc_malloc(sizeof(CachedInclude
) + strlen(filename
));
1370 strcpy(e
->filename
, filename
);
1371 e
->ifndef_macro
= ifndef_macro
;
1372 dynarray_add((void ***)&s1
->cached_includes
, &s1
->nb_cached_includes
, e
);
1373 /* add in hash table */
1374 h
= hash_cached_include(filename
);
1375 e
->hash_next
= s1
->cached_includes_hash
[h
];
1376 s1
->cached_includes_hash
[h
] = s1
->nb_cached_includes
;
1379 static void pragma_parse(TCCState
*s1
)
1384 if (tok
== TOK_pack
) {
1387 #pragma pack(1) // set
1388 #pragma pack() // reset to default
1389 #pragma pack(push,1) // push & set
1390 #pragma pack(pop) // restore previous
1394 if (tok
== TOK_ASM_pop
) {
1396 if (s1
->pack_stack_ptr
<= s1
->pack_stack
) {
1398 tcc_error("out of pack stack");
1400 s1
->pack_stack_ptr
--;
1404 if (tok
== TOK_ASM_push
) {
1406 if (s1
->pack_stack_ptr
>= s1
->pack_stack
+ PACK_STACK_SIZE
- 1)
1408 s1
->pack_stack_ptr
++;
1411 if (tok
!= TOK_CINT
) {
1413 tcc_error("invalid pack pragma");
1416 if (val
< 1 || val
> 16 || (val
& (val
- 1)) != 0)
1420 *s1
->pack_stack_ptr
= val
;
1423 } else if (tok
== TOK_comment
) {
1424 if (s1
->ms_extensions
) {
1427 if (tok
== TOK_lib
) {
1430 if (tok
!= TOK_STR
) {
1431 tcc_error("invalid library specification");
1433 int len
= strlen((char *)tokc
.cstr
->data
);
1434 char *file
= tcc_malloc(len
+ 4); /* filetype, "-l", and \0 at the end */
1435 file
[0] = TCC_FILETYPE_BINARY
;
1438 strcpy(&file
[3],(char *)tokc
.cstr
->data
);
1439 dynarray_add((void ***)&s1
->files
, &s1
->nb_files
, file
);
1444 tcc_warning("unknown specifier '%s' in #pragma comment", get_tok_str(tok
, &tokc
));
1447 tcc_warning("#pragma comment(lib) is ignored");
1452 /* is_bof is true if first non space token at beginning of file */
1453 ST_FUNC
void preprocess(int is_bof
)
1455 TCCState
*s1
= tcc_state
;
1456 int i
, c
, n
, saved_parse_flags
;
1460 saved_parse_flags
= parse_flags
;
1461 parse_flags
= PARSE_FLAG_PREPROCESS
| PARSE_FLAG_TOK_NUM
|
1462 PARSE_FLAG_LINEFEED
;
1463 parse_flags
|= (saved_parse_flags
& (PARSE_FLAG_ASM_FILE
| PARSE_FLAG_ASM_COMMENTS
));
1473 s
= define_find(tok
);
1474 /* undefine symbol by putting an invalid name */
1479 case TOK_INCLUDE_NEXT
:
1480 ch
= file
->buf_ptr
[0];
1481 /* XXX: incorrect if comments : use next_nomacro with a special mode */
1486 } else if (ch
== '\"') {
1491 while (ch
!= c
&& ch
!= '\n' && ch
!= CH_EOF
) {
1492 if ((q
- buf
) < sizeof(buf
) - 1)
1495 if (handle_stray_noerror() == 0)
1503 /* eat all spaces and comments after include */
1504 /* XXX: slightly incorrect */
1505 while (ch1
!= '\n' && ch1
!= CH_EOF
)
1509 /* computed #include : either we have only strings or
1510 we have anything enclosed in '<>' */
1513 if (tok
== TOK_STR
) {
1514 while (tok
!= TOK_LINEFEED
) {
1515 if (tok
!= TOK_STR
) {
1517 tcc_error("'#include' expects \"FILENAME\" or <FILENAME>");
1519 pstrcat(buf
, sizeof(buf
), (char *)tokc
.cstr
->data
);
1525 while (tok
!= TOK_LINEFEED
) {
1526 pstrcat(buf
, sizeof(buf
), get_tok_str(tok
, &tokc
));
1530 /* check syntax and remove '<>' */
1531 if (len
< 2 || buf
[0] != '<' || buf
[len
- 1] != '>')
1532 goto include_syntax
;
1533 memmove(buf
, buf
+ 1, len
- 2);
1534 buf
[len
- 2] = '\0';
1539 if (s1
->include_stack_ptr
>= s1
->include_stack
+ INCLUDE_STACK_SIZE
)
1540 tcc_error("#include recursion too deep");
1541 /* store current file in stack, but increment stack later below */
1542 *s1
->include_stack_ptr
= file
;
1544 n
= s1
->nb_include_paths
+ s1
->nb_sysinclude_paths
;
1545 for (i
= -2; i
< n
; ++i
) {
1546 char buf1
[sizeof file
->filename
];
1552 /* check absolute include path */
1553 if (!IS_ABSPATH(buf
))
1556 i
= n
; /* force end loop */
1558 } else if (i
== -1) {
1559 /* search in current dir if "header.h" */
1562 path
= file
->filename
;
1563 pstrncpy(buf1
, path
, tcc_basename(path
) - path
);
1566 /* search in all the include paths */
1567 if (i
< s1
->nb_include_paths
)
1568 path
= s1
->include_paths
[i
];
1570 path
= s1
->sysinclude_paths
[i
- s1
->nb_include_paths
];
1571 pstrcpy(buf1
, sizeof(buf1
), path
);
1572 pstrcat(buf1
, sizeof(buf1
), "/");
1575 pstrcat(buf1
, sizeof(buf1
), buf
);
1577 if (tok
== TOK_INCLUDE_NEXT
)
1578 for (f
= s1
->include_stack_ptr
; f
>= s1
->include_stack
; --f
)
1579 if (0 == PATHCMP((*f
)->filename
, buf1
)) {
1581 printf("%s: #include_next skipping %s\n", file
->filename
, buf1
);
1583 goto include_trynext
;
1586 e
= search_cached_include(s1
, buf1
);
1587 if (e
&& define_find(e
->ifndef_macro
)) {
1588 /* no need to parse the include because the 'ifndef macro'
1591 printf("%s: skipping cached %s\n", file
->filename
, buf1
);
1596 if (tcc_open(s1
, buf1
) < 0)
1601 printf("%s: including %s\n", file
->prev
->filename
, file
->filename
);
1603 /* update target deps */
1604 dynarray_add((void ***)&s1
->target_deps
, &s1
->nb_target_deps
,
1606 /* push current file in stack */
1607 ++s1
->include_stack_ptr
;
1608 /* add include file debug info */
1610 put_stabs(file
->filename
, N_BINCL
, 0, 0, 0);
1611 tok_flags
|= TOK_FLAG_BOF
| TOK_FLAG_BOL
;
1612 ch
= file
->buf_ptr
[0];
1615 tcc_error("include file '%s' not found", buf
);
1622 c
= expr_preprocess();
1628 if (tok
< TOK_IDENT
)
1629 tcc_error("invalid argument for '#if%sdef'", c
? "n" : "");
1633 printf("#ifndef %s\n", get_tok_str(tok
, NULL
));
1635 file
->ifndef_macro
= tok
;
1638 c
= (define_find(tok
) != 0) ^ c
;
1640 if (s1
->ifdef_stack_ptr
>= s1
->ifdef_stack
+ IFDEF_STACK_SIZE
)
1641 tcc_error("memory full (ifdef)");
1642 *s1
->ifdef_stack_ptr
++ = c
;
1645 if (s1
->ifdef_stack_ptr
== s1
->ifdef_stack
)
1646 tcc_error("#else without matching #if");
1647 if (s1
->ifdef_stack_ptr
[-1] & 2)
1648 tcc_error("#else after #else");
1649 c
= (s1
->ifdef_stack_ptr
[-1] ^= 3);
1652 if (s1
->ifdef_stack_ptr
== s1
->ifdef_stack
)
1653 tcc_error("#elif without matching #if");
1654 c
= s1
->ifdef_stack_ptr
[-1];
1656 tcc_error("#elif after #else");
1657 /* last #if/#elif expression was true: we skip */
1660 c
= expr_preprocess();
1661 s1
->ifdef_stack_ptr
[-1] = c
;
1663 if (s1
->ifdef_stack_ptr
== file
->ifdef_stack_ptr
+ 1)
1664 file
->ifndef_macro
= 0;
1674 if (s1
->ifdef_stack_ptr
<= file
->ifdef_stack_ptr
)
1675 tcc_error("#endif without matching #if");
1676 s1
->ifdef_stack_ptr
--;
1677 /* '#ifndef macro' was at the start of file. Now we check if
1678 an '#endif' is exactly at the end of file */
1679 if (file
->ifndef_macro
&&
1680 s1
->ifdef_stack_ptr
== file
->ifdef_stack_ptr
) {
1681 file
->ifndef_macro_saved
= file
->ifndef_macro
;
1682 /* need to set to zero to avoid false matches if another
1683 #ifndef at middle of file */
1684 file
->ifndef_macro
= 0;
1685 while (tok
!= TOK_LINEFEED
)
1687 tok_flags
|= TOK_FLAG_ENDIF
;
1693 if (tok
!= TOK_CINT
)
1694 tcc_error("A #line format is wrong");
1696 if (tok
!= TOK_CINT
) {
1697 char *p
= tokc
.cstr
->data
;
1698 tokc
.i
= strtoul(p
, (char **)&p
, 10);
1701 file
->line_num
= tokc
.i
- 1;
1703 if (tok
!= TOK_LINEFEED
) {
1704 if (tok
!= TOK_STR
) {
1705 if ((parse_flags
& PARSE_FLAG_ASM_COMMENTS
) == 0) {
1707 tcc_error("#line format is wrong");
1711 pstrcpy(file
->filename
, sizeof(file
->filename
),
1712 (char *)tokc
.cstr
->data
);
1715 put_stabs(file
->filename
, N_BINCL
, 0, 0, 0);
1720 ch
= file
->buf_ptr
[0];
1723 while (ch
!= '\n' && ch
!= CH_EOF
) {
1724 if ((q
- buf
) < sizeof(buf
) - 1)
1727 if (handle_stray_noerror() == 0)
1734 tcc_error("#error %s", buf
);
1736 tcc_warning("#warning %s", buf
);
1742 if (tok
== TOK_LINEFEED
|| tok
== '!' || tok
== TOK_PPNUM
) {
1743 /* '!' is ignored to allow C scripts. numbers are ignored
1744 to emulate cpp behaviour */
1746 if (!(parse_flags
& PARSE_FLAG_ASM_COMMENTS
))
1747 tcc_warning("Ignoring unknown preprocessing directive #%s", get_tok_str(tok
, &tokc
));
1749 /* this is a gas line comment in an 'S' file. */
1750 file
->buf_ptr
= parse_line_comment(file
->buf_ptr
);
1756 /* ignore other preprocess commands or #! for C scripts */
1757 while (tok
!= TOK_LINEFEED
)
1760 parse_flags
= saved_parse_flags
;
1763 /* evaluate escape codes in a string. */
1764 static void parse_escape_string(CString
*outstr
, const uint8_t *buf
, int is_long
)
1779 case '0': case '1': case '2': case '3':
1780 case '4': case '5': case '6': case '7':
1781 /* at most three octal digits */
1786 n
= n
* 8 + c
- '0';
1790 n
= n
* 8 + c
- '0';
1795 goto add_char_nonext
;
1803 if (c
>= 'a' && c
<= 'f')
1805 else if (c
>= 'A' && c
<= 'F')
1815 goto add_char_nonext
;
1839 goto invalid_escape
;
1849 if (c
>= '!' && c
<= '~')
1850 tcc_warning("unknown escape sequence: \'\\%c\'", c
);
1852 tcc_warning("unknown escape sequence: \'\\x%x\'", c
);
1859 cstr_ccat(outstr
, c
);
1861 cstr_wccat(outstr
, c
);
1863 /* add a trailing '\0' */
1865 cstr_ccat(outstr
, '\0');
1867 cstr_wccat(outstr
, '\0');
1870 /* we use 64 bit numbers */
1873 /* bn = (bn << shift) | or_val */
1874 static void bn_lshift(unsigned int *bn
, int shift
, int or_val
)
1878 for(i
=0;i
<BN_SIZE
;i
++) {
1880 bn
[i
] = (v
<< shift
) | or_val
;
1881 or_val
= v
>> (32 - shift
);
1885 static void bn_zero(unsigned int *bn
)
1888 for(i
=0;i
<BN_SIZE
;i
++) {
1893 /* parse number in null terminated string 'p' and return it in the
1895 static void parse_number(const char *p
)
1897 int b
, t
, shift
, frac_bits
, s
, exp_val
, ch
;
1899 unsigned int bn
[BN_SIZE
];
1910 goto float_frac_parse
;
1911 } else if (t
== '0') {
1912 if (ch
== 'x' || ch
== 'X') {
1916 } else if (tcc_ext
&& (ch
== 'b' || ch
== 'B')) {
1922 /* parse all digits. cannot check octal numbers at this stage
1923 because of floating point constants */
1925 if (ch
>= 'a' && ch
<= 'f')
1927 else if (ch
>= 'A' && ch
<= 'F')
1935 if (q
>= token_buf
+ STRING_MAX_SIZE
) {
1937 tcc_error("number too long");
1943 ((ch
== 'e' || ch
== 'E') && b
== 10) ||
1944 ((ch
== 'p' || ch
== 'P') && (b
== 16 || b
== 2))) {
1946 /* NOTE: strtox should support that for hexa numbers, but
1947 non ISOC99 libcs do not support it, so we prefer to do
1949 /* hexadecimal or binary floats */
1950 /* XXX: handle overflows */
1962 } else if (t
>= 'a') {
1964 } else if (t
>= 'A') {
1969 bn_lshift(bn
, shift
, t
);
1976 if (t
>= 'a' && t
<= 'f') {
1978 } else if (t
>= 'A' && t
<= 'F') {
1980 } else if (t
>= '0' && t
<= '9') {
1986 tcc_error("invalid digit");
1987 bn_lshift(bn
, shift
, t
);
1992 if (ch
!= 'p' && ch
!= 'P')
1999 } else if (ch
== '-') {
2003 if (ch
< '0' || ch
> '9')
2004 expect("exponent digits");
2005 while (ch
>= '0' && ch
<= '9') {
2006 exp_val
= exp_val
* 10 + ch
- '0';
2009 exp_val
= exp_val
* s
;
2011 /* now we can generate the number */
2012 /* XXX: should patch directly float number */
2013 d
= (double)bn
[1] * 4294967296.0 + (double)bn
[0];
2014 d
= ldexp(d
, exp_val
- frac_bits
);
2019 /* float : should handle overflow */
2021 } else if (t
== 'L') {
2023 #ifdef TCC_TARGET_PE
2028 /* XXX: not large enough */
2029 tokc
.ld
= (long double)d
;
2036 /* decimal floats */
2038 if (q
>= token_buf
+ STRING_MAX_SIZE
)
2043 while (ch
>= '0' && ch
<= '9') {
2044 if (q
>= token_buf
+ STRING_MAX_SIZE
)
2050 if (ch
== 'e' || ch
== 'E') {
2051 if (q
>= token_buf
+ STRING_MAX_SIZE
)
2055 if (ch
== '-' || ch
== '+') {
2056 if (q
>= token_buf
+ STRING_MAX_SIZE
)
2061 if (ch
< '0' || ch
> '9')
2062 expect("exponent digits");
2063 while (ch
>= '0' && ch
<= '9') {
2064 if (q
>= token_buf
+ STRING_MAX_SIZE
)
2076 tokc
.f
= strtof(token_buf
, NULL
);
2077 } else if (t
== 'L') {
2079 #ifdef TCC_TARGET_PE
2081 tokc
.d
= strtod(token_buf
, NULL
);
2084 tokc
.ld
= strtold(token_buf
, NULL
);
2088 tokc
.d
= strtod(token_buf
, NULL
);
2092 unsigned long long n
, n1
;
2093 int lcount
, ucount
, must_64bit
;
2096 /* integer number */
2099 if (b
== 10 && *q
== '0') {
2106 /* no need for checks except for base 10 / 8 errors */
2116 tcc_error("invalid digit");
2119 /* detect overflow */
2120 /* XXX: this test is not reliable */
2122 tcc_error("integer constant overflow");
2125 /* Determine the characteristics (unsigned and/or 64bit) the type of
2126 the constant must have according to the constant suffix(es) */
2127 lcount
= ucount
= must_64bit
= 0;
2133 tcc_error("three 'l's in integer constant");
2134 if (lcount
&& *(p
- 1) != ch
)
2135 tcc_error("incorrect integer suffix: %s", p1
);
2137 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
2142 } else if (t
== 'U') {
2144 tcc_error("two 'u's in integer constant");
2152 /* Whether 64 bits are needed to hold the constant's value */
2153 if (n
& 0xffffffff00000000LL
|| must_64bit
) {
2161 /* Whether type must be unsigned to hold the constant's value */
2162 if (ucount
|| ((n1
>> 31) && (b
!= 10))) {
2163 if (tok
== TOK_CLLONG
)
2167 /* If decimal and no unsigned suffix, bump to 64 bits or throw error */
2168 } else if (n1
>> 31) {
2169 if (tok
== TOK_CINT
)
2172 tcc_error("integer constant overflow");
2175 if (tok
== TOK_CINT
|| tok
== TOK_CUINT
)
2181 tcc_error("invalid number\n");
2185 #define PARSE2(c1, tok1, c2, tok2) \
2196 /* return next token without macro substitution */
2197 static inline void next_nomacro1(void)
2212 goto keep_tok_flags
;
2219 /* first look if it is in fact an end of buffer */
2220 if (p
>= file
->buf_end
) {
2224 if (p
>= file
->buf_end
)
2237 TCCState
*s1
= tcc_state
;
2238 if ((parse_flags
& PARSE_FLAG_LINEFEED
)
2239 && !(tok_flags
& TOK_FLAG_EOF
)) {
2240 tok_flags
|= TOK_FLAG_EOF
;
2242 goto keep_tok_flags
;
2243 } else if (!(parse_flags
& PARSE_FLAG_PREPROCESS
)) {
2245 } else if (s1
->ifdef_stack_ptr
!= file
->ifdef_stack_ptr
) {
2246 tcc_error("missing #endif");
2247 } else if (s1
->include_stack_ptr
== s1
->include_stack
) {
2248 /* no include left : end of file. */
2251 tok_flags
&= ~TOK_FLAG_EOF
;
2252 /* pop include file */
2254 /* test if previous '#endif' was after a #ifdef at
2256 if (tok_flags
& TOK_FLAG_ENDIF
) {
2258 printf("#endif %s\n", get_tok_str(file
->ifndef_macro_saved
, NULL
));
2260 add_cached_include(s1
, file
->filename
, file
->ifndef_macro_saved
);
2261 tok_flags
&= ~TOK_FLAG_ENDIF
;
2264 /* add end of include file debug info */
2265 if (tcc_state
->do_debug
) {
2266 put_stabd(N_EINCL
, 0, 0);
2268 /* pop include stack */
2270 s1
->include_stack_ptr
--;
2279 tok_flags
|= TOK_FLAG_BOL
;
2282 if (0 == (parse_flags
& PARSE_FLAG_LINEFEED
))
2285 goto keep_tok_flags
;
2290 if (is_space(c
) && (parse_flags
& PARSE_FLAG_ASM_FILE
)) {
2291 p
= parse_line_comment(p
);
2295 if ((tok_flags
& TOK_FLAG_BOL
) &&
2296 (parse_flags
& PARSE_FLAG_PREPROCESS
)) {
2298 preprocess(tok_flags
& TOK_FLAG_BOF
);
2304 tok
= TOK_TWOSHARPS
;
2306 if (parse_flags
& PARSE_FLAG_ASM_COMMENTS
) {
2307 p
= parse_line_comment(p
- 1);
2316 /* treat $ as allowed char in indentifier */
2317 case '$': if (!tcc_state
->dollars_in_identifiers
) goto parse_simple
;
2319 case 'a': case 'b': case 'c': case 'd':
2320 case 'e': case 'f': case 'g': case 'h':
2321 case 'i': case 'j': case 'k': case 'l':
2322 case 'm': case 'n': case 'o': case 'p':
2323 case 'q': case 'r': case 's': case 't':
2324 case 'u': case 'v': case 'w': case 'x':
2326 case 'A': case 'B': case 'C': case 'D':
2327 case 'E': case 'F': case 'G': case 'H':
2328 case 'I': case 'J': case 'K':
2329 case 'M': case 'N': case 'O': case 'P':
2330 case 'Q': case 'R': case 'S': case 'T':
2331 case 'U': case 'V': case 'W': case 'X':
2337 h
= TOK_HASH_FUNC(h
, c
);
2341 if (!isidnum_table
[c
-CH_EOF
])
2343 h
= TOK_HASH_FUNC(h
, c
);
2350 /* fast case : no stray found, so we have the full token
2351 and we have already hashed it */
2353 h
&= (TOK_HASH_SIZE
- 1);
2354 pts
= &hash_ident
[h
];
2359 if (ts
->len
== len
&& !memcmp(ts
->str
, p1
, len
))
2361 pts
= &(ts
->hash_next
);
2363 ts
= tok_alloc_new(pts
, (char *) p1
, len
);
2367 cstr_reset(&tokcstr
);
2370 cstr_ccat(&tokcstr
, *p1
);
2376 while (isidnum_table
[c
-CH_EOF
]) {
2377 cstr_ccat(&tokcstr
, c
);
2380 ts
= tok_alloc(tokcstr
.data
, tokcstr
.size
);
2386 if (t
!= '\\' && t
!= '\'' && t
!= '\"') {
2388 goto parse_ident_fast
;
2391 if (c
== '\'' || c
== '\"') {
2395 cstr_reset(&tokcstr
);
2396 cstr_ccat(&tokcstr
, 'L');
2397 goto parse_ident_slow
;
2401 case '0': case '1': case '2': case '3':
2402 case '4': case '5': case '6': case '7':
2405 cstr_reset(&tokcstr
);
2406 /* after the first digit, accept digits, alpha, '.' or sign if
2407 prefixed by 'eEpP' */
2411 cstr_ccat(&tokcstr
, c
);
2413 if (!(isnum(c
) || isid(c
) || c
== '.' ||
2414 ((c
== '+' || c
== '-') &&
2415 (t
== 'e' || t
== 'E' || t
== 'p' || t
== 'P'))))
2418 /* We add a trailing '\0' to ease parsing */
2419 cstr_ccat(&tokcstr
, '\0');
2420 tokc
.cstr
= &tokcstr
;
2424 /* special dot handling because it can also start a number */
2427 cstr_reset(&tokcstr
);
2428 cstr_ccat(&tokcstr
, '.');
2430 } else if (c
== '.') {
2433 if ((parse_flags
& PARSE_FLAG_ASM_COMMENTS
) == 0)
2454 /* parse the string */
2456 p
= parse_pp_string(p
, sep
, &str
);
2457 cstr_ccat(&str
, '\0');
2459 /* eval the escape (should be done as TOK_PPNUM) */
2460 cstr_reset(&tokcstr
);
2461 parse_escape_string(&tokcstr
, str
.data
, is_long
);
2466 /* XXX: make it portable */
2470 char_size
= sizeof(nwchar_t
);
2471 if (tokcstr
.size
<= char_size
)
2472 tcc_error("empty character constant");
2473 if (tokcstr
.size
> 2 * char_size
)
2474 tcc_warning("multi-character character constant");
2476 tokc
.i
= *(int8_t *)tokcstr
.data
;
2479 tokc
.i
= *(nwchar_t
*)tokcstr
.data
;
2483 tokc
.cstr
= &tokcstr
;
2497 } else if (c
== '<') {
2515 } else if (c
== '>') {
2533 } else if (c
== '=') {
2546 } else if (c
== '=') {
2559 } else if (c
== '=') {
2572 } else if (c
== '=') {
2575 } else if (c
== '>') {
2583 PARSE2('!', '!', '=', TOK_NE
)
2584 PARSE2('=', '=', '=', TOK_EQ
)
2585 PARSE2('*', '*', '=', TOK_A_MUL
)
2586 PARSE2('%', '%', '=', TOK_A_MOD
)
2587 PARSE2('^', '^', '=', TOK_A_XOR
)
2589 /* comments or operator */
2593 p
= parse_comment(p
);
2594 /* comments replaced by a blank */
2596 goto keep_tok_flags
;
2597 } else if (c
== '/') {
2598 p
= parse_line_comment(p
);
2600 goto keep_tok_flags
;
2601 } else if (c
== '=') {
2621 case '@': /* only used in assembler */
2627 if ((parse_flags
& PARSE_FLAG_ASM_FILE
) == 0)
2628 tcc_error("unrecognized character \\x%02x", c
);
2638 #if defined(PARSE_DEBUG)
2639 printf("token = %s\n", get_tok_str(tok
, &tokc
));
2643 /* return next token without macro substitution. Can read input from
2645 static void next_nomacro_spc(void)
2651 TOK_GET(&tok
, ¯o_ptr
, &tokc
);
2652 if (tok
== TOK_LINENUM
) {
2653 file
->line_num
= tokc
.i
;
2662 ST_FUNC
void next_nomacro(void)
2666 } while (is_space(tok
));
2669 /* substitute arguments in replacement lists in macro_str by the values in
2670 args (field d) and return allocated string */
2671 static int *macro_arg_subst(Sym
**nested_list
, const int *macro_str
, Sym
*args
)
2673 int last_tok
, t
, spc
;
2683 TOK_GET(&t
, ¯o_str
, &cval
);
2688 TOK_GET(&t
, ¯o_str
, &cval
);
2691 s
= sym_find2(args
, t
);
2697 TOK_GET(&t
, &st
, &cval
);
2698 if (!check_space(t
, &spc
))
2699 cstr_cat(&cstr
, get_tok_str(t
, &cval
));
2702 cstr_ccat(&cstr
, '\0');
2704 printf("stringize: %s\n", (char *)cstr
.data
);
2708 tok_str_add2(&str
, TOK_STR
, &cval
);
2711 tok_str_add2(&str
, t
, &cval
);
2713 } else if (t
>= TOK_IDENT
) {
2714 s
= sym_find2(args
, t
);
2717 /* if '##' is present before or after, no arg substitution */
2718 if (*macro_str
== TOK_TWOSHARPS
|| last_tok
== TOK_TWOSHARPS
) {
2719 /* special case for var arg macros : ## eats the
2720 ',' if empty VA_ARGS variable. */
2721 /* XXX: test of the ',' is not 100%
2722 reliable. should fix it to avoid security
2724 if (gnu_ext
&& s
->type
.t
&&
2725 last_tok
== TOK_TWOSHARPS
&&
2726 str
.len
>= 2 && str
.str
[str
.len
- 2] == ',') {
2727 if (*st
== TOK_PLCHLDR
) {
2728 /* suppress ',' '##' */
2731 /* suppress '##' and add variable */
2739 TOK_GET(&t1
, &st
, &cval
);
2742 tok_str_add2(&str
, t1
, &cval
);
2745 } else if (*st
!= TOK_PLCHLDR
) {
2746 /* NOTE: the stream cannot be read when macro
2747 substituing an argument */
2748 macro_subst(&str
, nested_list
, st
, NULL
);
2751 tok_str_add(&str
, t
);
2754 tok_str_add2(&str
, t
, &cval
);
2758 tok_str_add(&str
, 0);
2762 static char const ab_month_name
[12][4] =
2764 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
2765 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
2768 /* do macro substitution of current token with macro 's' and add
2769 result to (tok_str,tok_len). 'nested_list' is the list of all
2770 macros we got inside to avoid recursing. Return non zero if no
2771 substitution needs to be done */
2772 static int macro_subst_tok(TokenString
*tok_str
,
2773 Sym
**nested_list
, Sym
*s
, struct macro_level
**can_read_stream
)
2775 Sym
*args
, *sa
, *sa1
;
2776 int mstr_allocated
, parlevel
, *mstr
, t
, t1
, spc
;
2784 /* if symbol is a macro, prepare substitution */
2785 /* special macros */
2786 if (tok
== TOK___LINE__
) {
2787 snprintf(buf
, sizeof(buf
), "%d", file
->line_num
);
2791 } else if (tok
== TOK___FILE__
) {
2792 cstrval
= file
->filename
;
2794 } else if (tok
== TOK___DATE__
|| tok
== TOK___TIME__
) {
2799 tm
= localtime(&ti
);
2800 if (tok
== TOK___DATE__
) {
2801 snprintf(buf
, sizeof(buf
), "%s %2d %d",
2802 ab_month_name
[tm
->tm_mon
], tm
->tm_mday
, tm
->tm_year
+ 1900);
2804 snprintf(buf
, sizeof(buf
), "%02d:%02d:%02d",
2805 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
);
2812 cstr_cat(&cstr
, cstrval
);
2813 cstr_ccat(&cstr
, '\0');
2815 tok_str_add2(tok_str
, t1
, &cval
);
2820 if (s
->type
.t
== MACRO_FUNC
) {
2821 /* NOTE: we do not use next_nomacro to avoid eating the
2822 next token. XXX: find better solution */
2826 while (is_space(t
= *p
) || TOK_LINEFEED
== t
)
2828 if (t
== 0 && can_read_stream
) {
2829 /* end of macro stream: we must look at the token
2830 after in the file */
2831 struct macro_level
*ml
= *can_read_stream
;
2837 *can_read_stream
= ml
-> prev
;
2839 /* also, end of scope for nested defined symbol */
2840 (*nested_list
)->v
= -1;
2844 ch
= file
->buf_ptr
[0];
2845 while (is_space(ch
) || ch
== '\n' || ch
== '/')
2850 uint8_t *p
= file
->buf_ptr
;
2853 p
= parse_comment(p
);
2854 file
->buf_ptr
= p
- 1;
2855 } else if (c
== '/') {
2856 p
= parse_line_comment(p
);
2857 file
->buf_ptr
= p
- 1;
2865 if (t
!= '(') /* no macro subst */
2868 /* argument macro */
2873 /* NOTE: empty args are allowed, except if no args */
2875 /* handle '()' case */
2876 if (!args
&& !sa
&& tok
== ')')
2879 tcc_error("macro '%s' used with too many args",
2880 get_tok_str(s
->v
, 0));
2883 /* NOTE: non zero sa->t indicates VA_ARGS */
2884 while ((parlevel
> 0 ||
2886 (tok
!= ',' || sa
->type
.t
))) &&
2890 else if (tok
== ')')
2892 if (tok
== TOK_LINEFEED
)
2894 if (!check_space(tok
, &spc
))
2895 tok_str_add2(&str
, tok
, &tokc
);
2899 tok_str_add(&str
, TOK_PLCHLDR
);
2901 tok_str_add(&str
, 0);
2902 sa1
= sym_push2(&args
, sa
->v
& ~SYM_FIELD
, sa
->type
.t
, 0);
2906 /* special case for gcc var args: add an empty
2907 var arg argument if it is omitted */
2908 if (sa
&& sa
->type
.t
&& gnu_ext
)
2918 tcc_error("macro '%s' used with too few args",
2919 get_tok_str(s
->v
, 0));
2922 /* now subst each arg */
2923 mstr
= macro_arg_subst(nested_list
, mstr
, args
);
2928 tok_str_free(sa
->d
);
2934 sym_push2(nested_list
, s
->v
, 0, 0);
2935 macro_subst(tok_str
, nested_list
, mstr
, can_read_stream
);
2936 /* pop nested defined symbol */
2938 *nested_list
= sa1
->prev
;
2946 /* handle the '##' operator. Return NULL if no '##' seen. Otherwise
2947 return the resulting string (which must be freed). */
2948 static inline int *macro_twosharps(const int *macro_str
)
2952 TokenString macro_str1
;
2954 int n
, start_of_nosubsts
;
2956 /* we search the first '##' */
2957 for(ptr
= macro_str
;;) {
2959 TOK_GET(&t
, &ptr
, &cval
);
2960 if (t
== TOK_TWOSHARPS
)
2962 /* nothing more to do if end of string */
2967 /* we saw '##', so we need more processing to handle it */
2968 start_of_nosubsts
= -1;
2969 tok_str_new(¯o_str1
);
2970 for(ptr
= macro_str
;;) {
2971 TOK_GET(&tok
, &ptr
, &tokc
);
2974 if (tok
== TOK_TWOSHARPS
)
2976 if (tok
== TOK_NOSUBST
&& start_of_nosubsts
< 0)
2977 start_of_nosubsts
= macro_str1
.len
;
2978 while (*ptr
== TOK_TWOSHARPS
) {
2979 /* given 'a##b', remove nosubsts preceding 'a' */
2980 if (start_of_nosubsts
>= 0)
2981 macro_str1
.len
= start_of_nosubsts
;
2982 /* given 'a##b', skip '##' */
2984 /* given 'a##b', remove nosubsts preceding 'b' */
2985 while (t
== TOK_NOSUBST
)
2987 if (t
&& t
!= TOK_TWOSHARPS
) {
2989 TOK_GET(&t
, &ptr
, &cval
);
2990 /* We concatenate the two tokens */
2992 if (tok
!= TOK_PLCHLDR
)
2993 cstr_cat(&cstr
, get_tok_str(tok
, &tokc
));
2995 if (t
!= TOK_PLCHLDR
|| tok
== TOK_PLCHLDR
)
2996 cstr_cat(&cstr
, get_tok_str(t
, &cval
));
2997 cstr_ccat(&cstr
, '\0');
2999 tcc_open_bf(tcc_state
, ":paste:", cstr
.size
);
3000 memcpy(file
->buffer
, cstr
.data
, cstr
.size
);
3003 if (0 == *file
->buf_ptr
)
3005 tok_str_add2(¯o_str1
, tok
, &tokc
);
3006 tcc_warning("pasting \"%.*s\" and \"%s\" does not give a valid preprocessing token",
3007 n
, cstr
.data
, (char*)cstr
.data
+ n
);
3013 if (tok
!= TOK_NOSUBST
) {
3014 tok_str_add2(¯o_str1
, tok
, &tokc
);
3016 start_of_nosubsts
= -1;
3018 tok_str_add2(¯o_str1
, tok
, &tokc
);
3020 tok_str_add(¯o_str1
, 0);
3021 return macro_str1
.str
;
3025 /* do macro substitution of macro_str and add result to
3026 (tok_str,tok_len). 'nested_list' is the list of all macros we got
3027 inside to avoid recursing. */
3028 static void macro_subst(TokenString
*tok_str
, Sym
**nested_list
,
3029 const int *macro_str
, struct macro_level
** can_read_stream
)
3036 struct macro_level ml
;
3039 /* first scan for '##' operator handling */
3041 macro_str1
= macro_twosharps(ptr
);
3049 /* NOTE: ptr == NULL can only happen if tokens are read from
3050 file stream due to a macro function call */
3053 TOK_GET(&t
, &ptr
, &cval
);
3056 if (t
== TOK_NOSUBST
) {
3057 /* following token has already been subst'd. just copy it on */
3058 tok_str_add2(tok_str
, TOK_NOSUBST
, NULL
);
3059 TOK_GET(&t
, &ptr
, &cval
);
3064 /* if nested substitution, do nothing */
3065 if (sym_find2(*nested_list
, t
)) {
3066 /* and mark it as TOK_NOSUBST, so it doesn't get subst'd again */
3067 tok_str_add2(tok_str
, TOK_NOSUBST
, NULL
);
3071 if (can_read_stream
)
3072 ml
.prev
= *can_read_stream
, *can_read_stream
= &ml
;
3073 macro_ptr
= (int *)ptr
;
3075 ret
= macro_subst_tok(tok_str
, nested_list
, s
, can_read_stream
);
3076 ptr
= (int *)macro_ptr
;
3078 if (can_read_stream
&& *can_read_stream
== &ml
)
3079 *can_read_stream
= ml
.prev
;
3082 if (parse_flags
& PARSE_FLAG_SPACES
)
3087 tok_str_add(tok_str
, ' ');
3091 if (!check_space(t
, &spc
))
3092 tok_str_add2(tok_str
, t
, &cval
);
3096 tok_str_free(macro_str1
);
3099 /* return next token with macro substitution */
3100 ST_FUNC
void next(void)
3102 Sym
*nested_list
, *s
;
3104 struct macro_level
*ml
;
3107 if (parse_flags
& PARSE_FLAG_SPACES
)
3112 /* if not reading from macro substituted string, then try
3113 to substitute macros */
3114 if (tok
>= TOK_IDENT
&&
3115 (parse_flags
& PARSE_FLAG_PREPROCESS
)) {
3116 s
= define_find(tok
);
3118 /* we have a macro: we try to substitute */
3122 if (macro_subst_tok(&str
, &nested_list
, s
, &ml
) == 0) {
3123 /* substitution done, NOTE: maybe empty */
3124 tok_str_add(&str
, 0);
3125 macro_ptr
= str
.str
;
3126 macro_ptr_allocated
= str
.str
;
3133 /* end of macro or end of unget buffer */
3134 if (unget_buffer_enabled
) {
3135 macro_ptr
= unget_saved_macro_ptr
;
3136 unget_buffer_enabled
= 0;
3138 /* end of macro string: free it */
3139 tok_str_free(macro_ptr_allocated
);
3140 macro_ptr_allocated
= NULL
;
3144 } else if (tok
== TOK_NOSUBST
) {
3145 /* discard preprocessor's nosubst markers */
3150 /* convert preprocessor tokens into C tokens */
3151 if (tok
== TOK_PPNUM
&&
3152 (parse_flags
& PARSE_FLAG_TOK_NUM
)) {
3153 parse_number((char *)tokc
.cstr
->data
);
3157 /* push back current token and set current token to 'last_tok'. Only
3158 identifier case handled for labels. */
3159 ST_INLN
void unget_tok(int last_tok
)
3163 if (unget_buffer_enabled
)
3165 /* assert(macro_ptr == unget_saved_buffer + 1);
3166 assert(*macro_ptr == 0); */
3170 unget_saved_macro_ptr
= macro_ptr
;
3171 unget_buffer_enabled
= 1;
3173 q
= unget_saved_buffer
;
3176 n
= tok_ext_size(tok
) - 1;
3179 *q
= 0; /* end of token string */
3184 /* better than nothing, but needs extension to handle '-E' option
3186 ST_FUNC
void preprocess_init(TCCState
*s1
)
3188 s1
->include_stack_ptr
= s1
->include_stack
;
3189 /* XXX: move that before to avoid having to initialize
3190 file->ifdef_stack_ptr ? */
3191 s1
->ifdef_stack_ptr
= s1
->ifdef_stack
;
3192 file
->ifdef_stack_ptr
= s1
->ifdef_stack_ptr
;
3195 s1
->pack_stack
[0] = 0;
3196 s1
->pack_stack_ptr
= s1
->pack_stack
;
3199 ST_FUNC
void preprocess_new(void)
3204 /* init isid table */
3205 for(i
=CH_EOF
;i
<256;i
++)
3206 isidnum_table
[i
-CH_EOF
] = (isid(i
) || isnum(i
) ||
3207 (tcc_state
->dollars_in_identifiers
? i
== '$' : 0));
3209 /* add all tokens */
3211 tcc_free (table_ident
);
3214 memset(hash_ident
, 0, TOK_HASH_SIZE
* sizeof(TokenSym
*));
3216 tok_ident
= TOK_IDENT
;
3225 tok_alloc(p
, r
- p
- 1);
3230 static void line_macro_output(BufferedFile
*f
, const char *s
, TCCState
*s1
)
3232 switch (s1
->Pflag
) {
3233 case LINE_MACRO_OUTPUT_FORMAT_STD
:
3234 /* "tcc -E -P1" case */
3235 fprintf(s1
->ppfp
, "# line %d \"%s\"\n", f
->line_num
, f
->filename
);
3238 case LINE_MACRO_OUTPUT_FORMAT_NONE
:
3239 /* "tcc -E -P" case: don't output a line directive */
3242 case LINE_MACRO_OUTPUT_FORMAT_GCC
:
3244 /* "tcc -E" case: a gcc standard by default */
3245 fprintf(s1
->ppfp
, "# %d \"%s\"%s\n", f
->line_num
, f
->filename
, s
);
3250 /* Preprocess the current file */
3251 ST_FUNC
int tcc_preprocess(TCCState
*s1
)
3253 BufferedFile
*file_ref
, **iptr
, **iptr_new
;
3257 preprocess_init(s1
);
3258 ch
= file
->buf_ptr
[0];
3259 tok_flags
= TOK_FLAG_BOL
| TOK_FLAG_BOF
;
3260 parse_flags
= (parse_flags
& PARSE_FLAG_ASM_FILE
);
3261 parse_flags
|= PARSE_FLAG_ASM_COMMENTS
| PARSE_FLAG_PREPROCESS
|
3262 PARSE_FLAG_LINEFEED
| PARSE_FLAG_SPACES
;
3266 iptr
= s1
->include_stack_ptr
;
3270 if (tok
== TOK_EOF
) {
3272 } else if (file
!= file_ref
) {
3274 line_macro_output(file_ref
, "", s1
);
3276 } else if (tok
== TOK_LINEFEED
) {
3281 } else if (!token_seen
) {
3282 d
= file
->line_num
- file
->line_ref
;
3283 if (file
!= file_ref
|| d
>= 8) {
3286 if (tcc_state
->Pflag
== LINE_MACRO_OUTPUT_FORMAT_GCC
) {
3287 iptr_new
= s1
->include_stack_ptr
;
3288 s
= iptr_new
> iptr
? " 1"
3289 : iptr_new
< iptr
? " 2"
3290 : iptr_new
> s1
->include_stack
? " 3"
3294 line_macro_output(file
, s
, s1
);
3297 fputs("\n", s1
->ppfp
), --d
;
3299 file
->line_ref
= (file_ref
= file
)->line_num
;
3300 token_seen
= tok
!= TOK_LINEFEED
;
3304 fputs(get_tok_str(tok
, &tokc
), s1
->ppfp
);