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 /* additional informations about token */
28 #define TOK_FLAG_BOL 0x0001 /* beginning of line before */
29 #define TOK_FLAG_BOF 0x0002 /* beginning of file before */
30 #define TOK_FLAG_ENDIF 0x0004 /* a endif was found matching starting #ifdef */
31 #define TOK_FLAG_EOF 0x0008 /* end of file */
33 ST_DATA int parse_flags;
34 #define PARSE_FLAG_PREPROCESS 0x0001 /* activate preprocessing */
35 #define PARSE_FLAG_TOK_NUM 0x0002 /* return numbers instead of TOK_PPNUM */
36 #define PARSE_FLAG_LINEFEED 0x0004 /* line feed is returned as a
37 token. line feed is also
39 #define PARSE_FLAG_ASM_COMMENTS 0x0008 /* '#' can be used for line comment */
40 #define PARSE_FLAG_SPACES 0x0010 /* next() returns space tokens (for -E) */
42 ST_DATA struct BufferedFile *file;
45 ST_DATA const int *macro_ptr;
46 ST_DATA CString tokcstr; /* current parsed string, if any */
48 /* display benchmark infos */
49 ST_DATA int total_lines;
50 ST_DATA int total_bytes;
51 ST_DATA int tok_ident;
52 ST_DATA TokenSym **table_ident;
54 /* ------------------------------------------------------------------------- */
56 static int *macro_ptr_allocated;
57 static const int *unget_saved_macro_ptr;
58 static int unget_saved_buffer[TOK_MAX_SIZE + 1];
59 static int unget_buffer_enabled;
60 static TokenSym *hash_ident[TOK_HASH_SIZE];
61 static char token_buf[STRING_MAX_SIZE + 1];
62 /* true if isid(c) || isnum(c) */
63 static unsigned char isidnum_table[256-CH_EOF];
65 static const char tcc_keywords[] =
66 #define DEF(id, str) str "\0"
71 /* WARNING: the content of this string encodes token numbers */
72 static const unsigned char tok_two_chars[] =
73 "<=\236>=\235!=\225&&\240||\241++\244--\242==\224<<\1>>\2+=\253"
74 "-=\255*=\252/=\257%=\245&=\246^=\336|=\374->\313..\250##\266";
77 struct macro_level *prev;
81 static void next_nomacro_spc(void);
82 static void macro_subst(
86 struct macro_level **can_read_stream
89 ST_FUNC void skip(int c)
92 tcc_error("'%c' expected (got \"%s\")", c, get_tok_str(tok, &tokc));
96 ST_FUNC void expect(const char *msg)
98 tcc_error("%s expected", msg);
101 /* ------------------------------------------------------------------------- */
102 /* CString handling */
103 static void cstr_realloc(CString *cstr, int new_size)
108 size = cstr->size_allocated;
110 size = 8; /* no need to allocate a too small first string */
111 while (size < new_size)
113 data = tcc_realloc(cstr->data_allocated, size);
114 cstr->data_allocated = data;
115 cstr->size_allocated = size;
120 ST_FUNC void cstr_ccat(CString *cstr, int ch)
123 size = cstr->size + 1;
124 if (size > cstr->size_allocated)
125 cstr_realloc(cstr, size);
126 ((unsigned char *)cstr->data)[size - 1] = ch;
130 ST_FUNC void cstr_cat(CString *cstr, const char *str)
142 /* add a wide char */
143 ST_FUNC void cstr_wccat(CString *cstr, int ch)
146 size = cstr->size + sizeof(nwchar_t);
147 if (size > cstr->size_allocated)
148 cstr_realloc(cstr, size);
149 *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
153 ST_FUNC void cstr_new(CString *cstr)
155 memset(cstr, 0, sizeof(CString));
158 /* free string and reset it to NULL */
159 ST_FUNC void cstr_free(CString *cstr)
161 tcc_free(cstr->data_allocated);
165 /* reset string to empty */
166 ST_FUNC void cstr_reset(CString *cstr)
172 static void add_char(CString *cstr, int c)
174 if (c == '\'' || c == '\"' || c == '\\') {
175 /* XXX: could be more precise if char or string */
176 cstr_ccat(cstr, '\\');
178 if (c >= 32 && c <= 126) {
181 cstr_ccat(cstr, '\\');
183 cstr_ccat(cstr, 'n');
185 cstr_ccat(cstr, '0' + ((c >> 6) & 7));
186 cstr_ccat(cstr, '0' + ((c >> 3) & 7));
187 cstr_ccat(cstr, '0' + (c & 7));
192 /* ------------------------------------------------------------------------- */
193 /* allocate a new token */
194 static TokenSym *tok_alloc_new(TokenSym **pts, const char *str, int len)
196 TokenSym *ts, **ptable;
199 if (tok_ident >= SYM_FIRST_ANOM)
200 tcc_error("memory full");
202 /* expand token table if needed */
203 i = tok_ident - TOK_IDENT;
204 if ((i % TOK_ALLOC_INCR) == 0) {
205 ptable = tcc_realloc(table_ident, (i + TOK_ALLOC_INCR) * sizeof(TokenSym *));
206 table_ident = ptable;
209 ts = tcc_malloc(sizeof(TokenSym) + len);
211 ts->tok = tok_ident++;
212 ts->sym_define = NULL;
213 ts->sym_label = NULL;
214 ts->sym_struct = NULL;
215 ts->sym_identifier = NULL;
217 ts->hash_next = NULL;
218 memcpy(ts->str, str, len);
224 #define TOK_HASH_INIT 1
225 #define TOK_HASH_FUNC(h, c) ((h) * 263 + (c))
227 /* find a token and add it if not found */
228 ST_FUNC TokenSym *tok_alloc(const char *str, int len)
236 h = TOK_HASH_FUNC(h, ((unsigned char *)str)[i]);
237 h &= (TOK_HASH_SIZE - 1);
239 pts = &hash_ident[h];
244 if (ts->len == len && !memcmp(ts->str, str, len))
246 pts = &(ts->hash_next);
248 return tok_alloc_new(pts, str, len);
251 /* XXX: buffer overflow */
252 /* XXX: float tokens */
253 ST_FUNC char *get_tok_str(int v, CValue *cv)
255 static char buf[STRING_MAX_SIZE + 1];
256 static CString cstr_buf;
261 /* NOTE: to go faster, we give a fixed buffer for small strings */
262 cstr_reset(&cstr_buf);
264 cstr_buf.size_allocated = sizeof(buf);
270 /* XXX: not quite exact, but only useful for testing */
271 sprintf(p, "%u", cv->ui);
275 /* XXX: not quite exact, but only useful for testing */
277 sprintf(p, "%u", (unsigned)cv->ull);
279 sprintf(p, "%Lu", cv->ull);
283 cstr_ccat(&cstr_buf, 'L');
285 cstr_ccat(&cstr_buf, '\'');
286 add_char(&cstr_buf, cv->i);
287 cstr_ccat(&cstr_buf, '\'');
288 cstr_ccat(&cstr_buf, '\0');
292 len = cstr->size - 1;
294 add_char(&cstr_buf, ((unsigned char *)cstr->data)[i]);
295 cstr_ccat(&cstr_buf, '\0');
298 cstr_ccat(&cstr_buf, 'L');
301 cstr_ccat(&cstr_buf, '\"');
303 len = cstr->size - 1;
305 add_char(&cstr_buf, ((unsigned char *)cstr->data)[i]);
307 len = (cstr->size / sizeof(nwchar_t)) - 1;
309 add_char(&cstr_buf, ((nwchar_t *)cstr->data)[i]);
311 cstr_ccat(&cstr_buf, '\"');
312 cstr_ccat(&cstr_buf, '\0');
321 return strcpy(p, "...");
323 return strcpy(p, "<<=");
325 return strcpy(p, ">>=");
328 /* search in two bytes table */
329 const unsigned char *q = tok_two_chars;
342 } else if (v < tok_ident) {
343 return table_ident[v - TOK_IDENT]->str;
344 } else if (v >= SYM_FIRST_ANOM) {
345 /* special name for anonymous symbol */
346 sprintf(p, "L.%u", v - SYM_FIRST_ANOM);
348 /* should never happen */
353 return cstr_buf.data;
356 /* fill input buffer and peek next char */
357 static int tcc_peekc_slow(BufferedFile *bf)
360 /* only tries to read if really end of buffer */
361 if (bf->buf_ptr >= bf->buf_end) {
363 #if defined(PARSE_DEBUG)
368 len = read(bf->fd, bf->buffer, len);
375 bf->buf_ptr = bf->buffer;
376 bf->buf_end = bf->buffer + len;
377 *bf->buf_end = CH_EOB;
379 if (bf->buf_ptr < bf->buf_end) {
380 return bf->buf_ptr[0];
382 bf->buf_ptr = bf->buf_end;
387 /* return the current character, handling end of block if necessary
389 ST_FUNC int handle_eob(void)
391 return tcc_peekc_slow(file);
394 /* read next char from current input file and handle end of input buffer */
395 ST_INLN void inp(void)
397 ch = *(++(file->buf_ptr));
398 /* end of buffer/file handling */
403 /* handle '\[\r]\n' */
404 static int handle_stray_noerror(void)
411 } else if (ch == '\r') {
425 static void handle_stray(void)
427 if (handle_stray_noerror())
428 tcc_error("stray '\\' in program");
431 /* skip the stray and handle the \\n case. Output an error if
432 incorrect char after the stray */
433 static int handle_stray1(uint8_t *p)
437 if (p >= file->buf_end) {
454 /* handle just the EOB case, but not stray */
455 #define PEEKC_EOB(c, p)\
466 /* handle the complicated stray case */
472 c = handle_stray1(p);\
477 /* input with '\[\r]\n' handling. Note that this function cannot
478 handle other characters after '\', so you cannot call it inside
479 strings or comments */
480 ST_FUNC void minp(void)
488 /* single line C++ comments */
489 static uint8_t *parse_line_comment(uint8_t *p)
497 if (c == '\n' || c == CH_EOF) {
499 } else if (c == '\\') {
508 } else if (c == '\r') {
526 ST_FUNC uint8_t *parse_comment(uint8_t *p)
535 if (c == '\n' || c == '*' || c == '\\')
539 if (c == '\n' || c == '*' || c == '\\')
543 /* now we can handle all the cases */
547 } else if (c == '*') {
553 } else if (c == '/') {
555 } else if (c == '\\') {
560 /* skip '\[\r]\n', otherwise just skip the stray */
566 } else if (c == '\r') {
583 /* stray, eob or eof */
588 tcc_error("unexpected end of file in comment");
589 } else if (c == '\\') {
601 static inline void skip_spaces(void)
607 static inline int check_space(int t, int *spc)
618 /* parse a string without interpreting escapes */
619 static uint8_t *parse_pp_string(uint8_t *p,
620 int sep, CString *str)
628 } else if (c == '\\') {
634 /* XXX: indicate line number of start of string */
635 tcc_error("missing terminating %c character", sep);
636 } else if (c == '\\') {
637 /* escape : just skip \[\r]\n */
642 } else if (c == '\r') {
645 expect("'\n' after '\r'");
648 } else if (c == CH_EOF) {
649 goto unterminated_string;
652 cstr_ccat(str, '\\');
658 } else if (c == '\n') {
661 } else if (c == '\r') {
665 cstr_ccat(str, '\r');
681 /* skip block of text until #else, #elif or #endif. skip also pairs of
683 static void preprocess_skip(void)
685 int a, start_of_line, c, in_warn_or_error;
692 in_warn_or_error = 0;
713 } else if (c == '\\') {
714 ch = file->buf_ptr[0];
715 handle_stray_noerror();
722 if (in_warn_or_error)
724 p = parse_pp_string(p, c, NULL);
728 if (in_warn_or_error)
735 p = parse_comment(p);
736 } else if (ch == '/') {
737 p = parse_line_comment(p);
747 (tok == TOK_ELSE || tok == TOK_ELIF || tok == TOK_ENDIF))
749 if (tok == TOK_IF || tok == TOK_IFDEF || tok == TOK_IFNDEF)
751 else if (tok == TOK_ENDIF)
753 else if( tok == TOK_ERROR || tok == TOK_WARNING)
754 in_warn_or_error = 1;
755 else if (tok == TOK_LINEFEED)
770 /* ParseState handling */
772 /* XXX: currently, no include file info is stored. Thus, we cannot display
773 accurate messages if the function or data definition spans multiple
776 /* save current parse state in 's' */
777 ST_FUNC void save_parse_state(ParseState *s)
779 s->line_num = file->line_num;
780 s->macro_ptr = macro_ptr;
785 /* restore parse state from 's' */
786 ST_FUNC void restore_parse_state(ParseState *s)
788 file->line_num = s->line_num;
789 macro_ptr = s->macro_ptr;
794 /* return the number of additional 'ints' necessary to store the
796 static inline int tok_ext_size(int t)
810 tcc_error("unsupported token");
817 return LDOUBLE_SIZE / 4;
823 /* token string handling */
825 ST_INLN void tok_str_new(TokenString *s)
829 s->allocated_len = 0;
830 s->last_line_num = -1;
833 ST_FUNC void tok_str_free(int *str)
838 static int *tok_str_realloc(TokenString *s)
842 if (s->allocated_len == 0) {
845 len = s->allocated_len * 2;
847 str = tcc_realloc(s->str, len * sizeof(int));
848 s->allocated_len = len;
853 ST_FUNC void tok_str_add(TokenString *s, int t)
859 if (len >= s->allocated_len)
860 str = tok_str_realloc(s);
865 static void tok_str_add2(TokenString *s, int t, CValue *cv)
872 /* allocate space for worst case */
873 if (len + TOK_MAX_SIZE > s->allocated_len)
874 str = tok_str_realloc(s);
883 str[len++] = cv->tab[0];
892 nb_words = (sizeof(CString) + cv->cstr->size + 3) >> 2;
893 while ((len + nb_words) > s->allocated_len)
894 str = tok_str_realloc(s);
895 cstr = (CString *)(str + len);
897 cstr->size = cv->cstr->size;
898 cstr->data_allocated = NULL;
899 cstr->size_allocated = cstr->size;
900 memcpy((char *)cstr + sizeof(CString),
901 cv->cstr->data, cstr->size);
908 #if LDOUBLE_SIZE == 8
911 str[len++] = cv->tab[0];
912 str[len++] = cv->tab[1];
914 #if LDOUBLE_SIZE == 12
916 str[len++] = cv->tab[0];
917 str[len++] = cv->tab[1];
918 str[len++] = cv->tab[2];
919 #elif LDOUBLE_SIZE == 16
921 str[len++] = cv->tab[0];
922 str[len++] = cv->tab[1];
923 str[len++] = cv->tab[2];
924 str[len++] = cv->tab[3];
925 #elif LDOUBLE_SIZE != 8
926 #error add long double size support
935 /* add the current parse token in token string 's' */
936 ST_FUNC void tok_str_add_tok(TokenString *s)
940 /* save line number info */
941 if (file->line_num != s->last_line_num) {
942 s->last_line_num = file->line_num;
943 cval.i = s->last_line_num;
944 tok_str_add2(s, TOK_LINENUM, &cval);
946 tok_str_add2(s, tok, &tokc);
949 /* get a token from an integer array and increment pointer
950 accordingly. we code it as a macro to avoid pointer aliasing. */
951 static inline void TOK_GET(int *t, const int **pp, CValue *cv)
969 cv->cstr = (CString *)p;
970 cv->cstr->data = (char *)p + sizeof(CString);
971 p += (sizeof(CString) + cv->cstr->size + 3) >> 2;
979 #if LDOUBLE_SIZE == 16
981 #elif LDOUBLE_SIZE == 12
983 #elif LDOUBLE_SIZE == 8
986 # error add long double size support
999 static int macro_is_equal(const int *a, const int *b)
1001 char buf[STRING_MAX_SIZE + 1];
1005 TOK_GET(&t, &a, &cv);
1006 pstrcpy(buf, sizeof buf, get_tok_str(t, &cv));
1007 TOK_GET(&t, &b, &cv);
1008 if (strcmp(buf, get_tok_str(t, &cv)))
1014 /* defines handling */
1015 ST_INLN void define_push(int v, int macro_type, int *str, Sym *first_arg)
1020 if (s && !macro_is_equal(s->d, str))
1021 tcc_warning("%s redefined", get_tok_str(v, NULL));
1023 s = sym_push2(&define_stack, v, macro_type, 0);
1025 s->next = first_arg;
1026 table_ident[v - TOK_IDENT]->sym_define = s;
1029 /* undefined a define symbol. Its name is just set to zero */
1030 ST_FUNC void define_undef(Sym *s)
1034 if (v >= TOK_IDENT && v < tok_ident)
1035 table_ident[v - TOK_IDENT]->sym_define = NULL;
1039 ST_INLN Sym *define_find(int v)
1042 if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1044 return table_ident[v]->sym_define;
1047 /* free define stack until top reaches 'b' */
1048 ST_FUNC void free_defines(Sym *b)
1056 /* do not free args or predefined defines */
1058 tok_str_free(top->d);
1060 if (v >= TOK_IDENT && v < tok_ident)
1061 table_ident[v - TOK_IDENT]->sym_define = NULL;
1069 ST_FUNC Sym *label_find(int v)
1072 if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1074 return table_ident[v]->sym_label;
1077 ST_FUNC Sym *label_push(Sym **ptop, int v, int flags)
1080 s = sym_push2(ptop, v, 0, 0);
1082 ps = &table_ident[v - TOK_IDENT]->sym_label;
1083 if (ptop == &global_label_stack) {
1084 /* modify the top most local identifier, so that
1085 sym_identifier will point to 's' when popped */
1087 ps = &(*ps)->prev_tok;
1094 /* pop labels until element last is reached. Look if any labels are
1095 undefined. Define symbols if '&&label' was used. */
1096 ST_FUNC void label_pop(Sym **ptop, Sym *slast)
1099 for(s = *ptop; s != slast; s = s1) {
1101 if (s->r == LABEL_DECLARED) {
1102 tcc_warning("label '%s' declared but not used", get_tok_str(s->v, NULL));
1103 } else if (s->r == LABEL_FORWARD) {
1104 tcc_error("label '%s' used but not defined",
1105 get_tok_str(s->v, NULL));
1108 /* define corresponding symbol. A size of
1110 put_extern_sym(s, cur_text_section, s->jnext, 1);
1114 table_ident[s->v - TOK_IDENT]->sym_label = s->prev_tok;
1120 /* eval an expression for #if/#elif */
1121 static int expr_preprocess(void)
1127 while (tok != TOK_LINEFEED && tok != TOK_EOF) {
1128 next(); /* do macro subst */
1129 if (tok == TOK_DEFINED) {
1134 c = define_find(tok) != 0;
1139 } else if (tok >= TOK_IDENT) {
1140 /* if undefined macro */
1144 tok_str_add_tok(&str);
1146 tok_str_add(&str, -1); /* simulate end of file */
1147 tok_str_add(&str, 0);
1148 /* now evaluate C constant expression */
1149 macro_ptr = str.str;
1153 tok_str_free(str.str);
1157 #if defined(PARSE_DEBUG) || defined(PP_DEBUG)
1158 static void tok_print(int *str)
1165 TOK_GET(&t, &str, &cval);
1168 printf("%s", get_tok_str(t, &cval));
1174 /* parse after #define */
1175 ST_FUNC void parse_define(void)
1177 Sym *s, *first, **ps;
1178 int v, t, varg, is_vaargs, spc;
1183 tcc_error("invalid macro name '%s'", get_tok_str(tok, &tokc));
1184 /* XXX: should check if same macro (ANSI) */
1187 /* '(' must be just after macro definition for MACRO_FUNC */
1192 while (tok != ')') {
1196 if (varg == TOK_DOTS) {
1197 varg = TOK___VA_ARGS__;
1199 } else if (tok == TOK_DOTS && gnu_ext) {
1203 if (varg < TOK_IDENT)
1204 tcc_error("badly punctuated parameter list");
1205 s = sym_push2(&define_stack, varg | SYM_FIELD, is_vaargs, 0);
1218 /* EOF testing necessary for '-D' handling */
1219 while (tok != TOK_LINEFEED && tok != TOK_EOF) {
1220 /* remove spaces around ## and after '#' */
1221 if (TOK_TWOSHARPS == tok) {
1225 } else if ('#' == tok) {
1227 } else if (check_space(tok, &spc)) {
1230 tok_str_add2(&str, tok, &tokc);
1235 --str.len; /* remove trailing space */
1236 tok_str_add(&str, 0);
1238 printf("define %s %d: ", get_tok_str(v, NULL), t);
1241 define_push(v, t, str.str, first);
1244 static inline int hash_cached_include(const char *filename)
1246 const unsigned char *s;
1252 h = TOK_HASH_FUNC(h, *s);
1255 h &= (CACHED_INCLUDES_HASH_SIZE - 1);
1259 static CachedInclude *search_cached_include(TCCState *s1, const char *filename)
1263 h = hash_cached_include(filename);
1264 i = s1->cached_includes_hash[h];
1268 e = s1->cached_includes[i - 1];
1269 if (0 == PATHCMP(e->filename, filename))
1276 static inline void add_cached_include(TCCState *s1, const char *filename, int ifndef_macro)
1281 if (search_cached_include(s1, filename))
1284 printf("adding cached '%s' %s\n", filename, get_tok_str(ifndef_macro, NULL));
1286 e = tcc_malloc(sizeof(CachedInclude) + strlen(filename));
1287 strcpy(e->filename, filename);
1288 e->ifndef_macro = ifndef_macro;
1289 dynarray_add((void ***)&s1->cached_includes, &s1->nb_cached_includes, e);
1290 /* add in hash table */
1291 h = hash_cached_include(filename);
1292 e->hash_next = s1->cached_includes_hash[h];
1293 s1->cached_includes_hash[h] = s1->nb_cached_includes;
1296 static void pragma_parse(TCCState *s1)
1301 if (tok == TOK_pack) {
1304 #pragma pack(1) // set
1305 #pragma pack() // reset to default
1306 #pragma pack(push,1) // push & set
1307 #pragma pack(pop) // restore previous
1311 if (tok == TOK_ASM_pop) {
1313 if (s1->pack_stack_ptr <= s1->pack_stack) {
1315 tcc_error("out of pack stack");
1317 s1->pack_stack_ptr--;
1321 if (tok == TOK_ASM_push) {
1323 if (s1->pack_stack_ptr >= s1->pack_stack + PACK_STACK_SIZE - 1)
1325 s1->pack_stack_ptr++;
1328 if (tok != TOK_CINT) {
1330 tcc_error("invalid pack pragma");
1333 if (val < 1 || val > 16 || (val & (val - 1)) != 0)
1337 *s1->pack_stack_ptr = val;
1343 /* is_bof is true if first non space token at beginning of file */
1344 ST_FUNC void preprocess(int is_bof)
1346 TCCState *s1 = tcc_state;
1347 int i, c, n, saved_parse_flags;
1351 saved_parse_flags = parse_flags;
1352 parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM |
1353 PARSE_FLAG_LINEFEED;
1363 s = define_find(tok);
1364 /* undefine symbol by putting an invalid name */
1369 case TOK_INCLUDE_NEXT:
1370 ch = file->buf_ptr[0];
1371 /* XXX: incorrect if comments : use next_nomacro with a special mode */
1376 } else if (ch == '\"') {
1381 while (ch != c && ch != '\n' && ch != CH_EOF) {
1382 if ((q - buf) < sizeof(buf) - 1)
1385 if (handle_stray_noerror() == 0)
1393 /* eat all spaces and comments after include */
1394 /* XXX: slightly incorrect */
1395 while (ch1 != '\n' && ch1 != CH_EOF)
1399 /* computed #include : either we have only strings or
1400 we have anything enclosed in '<>' */
1403 if (tok == TOK_STR) {
1404 while (tok != TOK_LINEFEED) {
1405 if (tok != TOK_STR) {
1407 tcc_error("'#include' expects \"FILENAME\" or <FILENAME>");
1409 pstrcat(buf, sizeof(buf), (char *)tokc.cstr->data);
1415 while (tok != TOK_LINEFEED) {
1416 pstrcat(buf, sizeof(buf), get_tok_str(tok, &tokc));
1420 /* check syntax and remove '<>' */
1421 if (len < 2 || buf[0] != '<' || buf[len - 1] != '>')
1422 goto include_syntax;
1423 memmove(buf, buf + 1, len - 2);
1424 buf[len - 2] = '\0';
1429 if (s1->include_stack_ptr >= s1->include_stack + INCLUDE_STACK_SIZE)
1430 tcc_error("#include recursion too deep");
1431 /* store current file in stack, but increment stack later below */
1432 *s1->include_stack_ptr = file;
1434 n = s1->nb_include_paths + s1->nb_sysinclude_paths;
1435 for (i = -2; i < n; ++i) {
1436 char buf1[sizeof file->filename];
1442 /* check absolute include path */
1443 if (!IS_ABSPATH(buf))
1446 i = n; /* force end loop */
1448 } else if (i == -1) {
1449 /* search in current dir if "header.h" */
1452 path = file->filename;
1453 pstrncpy(buf1, path, tcc_basename(path) - path);
1456 /* search in all the include paths */
1457 if (i < s1->nb_include_paths)
1458 path = s1->include_paths[i];
1460 path = s1->sysinclude_paths[i - s1->nb_include_paths];
1461 pstrcpy(buf1, sizeof(buf1), path);
1462 pstrcat(buf1, sizeof(buf1), "/");
1465 pstrcat(buf1, sizeof(buf1), buf);
1467 if (tok == TOK_INCLUDE_NEXT)
1468 for (f = s1->include_stack_ptr; f >= s1->include_stack; --f)
1469 if (0 == PATHCMP((*f)->filename, buf1)) {
1471 printf("%s: #include_next skipping %s\n", file->filename, buf1);
1473 goto include_trynext;
1476 e = search_cached_include(s1, buf1);
1477 if (e && define_find(e->ifndef_macro)) {
1478 /* no need to parse the include because the 'ifndef macro'
1481 printf("%s: skipping cached %s\n", file->filename, buf1);
1486 if (tcc_open(s1, buf1) < 0)
1491 printf("%s: including %s\n", file->prev->filename, file->filename);
1493 /* update target deps */
1494 dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1496 /* push current file in stack */
1497 ++s1->include_stack_ptr;
1498 /* add include file debug info */
1500 put_stabs(file->filename, N_BINCL, 0, 0, 0);
1501 tok_flags |= TOK_FLAG_BOF | TOK_FLAG_BOL;
1502 ch = file->buf_ptr[0];
1505 tcc_error("include file '%s' not found", buf);
1512 c = expr_preprocess();
1518 if (tok < TOK_IDENT)
1519 tcc_error("invalid argument for '#if%sdef'", c ? "n" : "");
1523 printf("#ifndef %s\n", get_tok_str(tok, NULL));
1525 file->ifndef_macro = tok;
1528 c = (define_find(tok) != 0) ^ c;
1530 if (s1->ifdef_stack_ptr >= s1->ifdef_stack + IFDEF_STACK_SIZE)
1531 tcc_error("memory full");
1532 *s1->ifdef_stack_ptr++ = c;
1535 if (s1->ifdef_stack_ptr == s1->ifdef_stack)
1536 tcc_error("#else without matching #if");
1537 if (s1->ifdef_stack_ptr[-1] & 2)
1538 tcc_error("#else after #else");
1539 c = (s1->ifdef_stack_ptr[-1] ^= 3);
1542 if (s1->ifdef_stack_ptr == s1->ifdef_stack)
1543 tcc_error("#elif without matching #if");
1544 c = s1->ifdef_stack_ptr[-1];
1546 tcc_error("#elif after #else");
1547 /* last #if/#elif expression was true: we skip */
1550 c = expr_preprocess();
1551 s1->ifdef_stack_ptr[-1] = c;
1553 if (s1->ifdef_stack_ptr == file->ifdef_stack_ptr + 1)
1554 file->ifndef_macro = 0;
1564 if (s1->ifdef_stack_ptr <= file->ifdef_stack_ptr)
1565 tcc_error("#endif without matching #if");
1566 s1->ifdef_stack_ptr--;
1567 /* '#ifndef macro' was at the start of file. Now we check if
1568 an '#endif' is exactly at the end of file */
1569 if (file->ifndef_macro &&
1570 s1->ifdef_stack_ptr == file->ifdef_stack_ptr) {
1571 file->ifndef_macro_saved = file->ifndef_macro;
1572 /* need to set to zero to avoid false matches if another
1573 #ifndef at middle of file */
1574 file->ifndef_macro = 0;
1575 while (tok != TOK_LINEFEED)
1577 tok_flags |= TOK_FLAG_ENDIF;
1583 if (tok != TOK_CINT)
1585 file->line_num = tokc.i - 1; /* the line number will be incremented after */
1587 if (tok != TOK_LINEFEED) {
1590 pstrcpy(file->filename, sizeof(file->filename),
1591 (char *)tokc.cstr->data);
1597 ch = file->buf_ptr[0];
1600 while (ch != '\n' && ch != CH_EOF) {
1601 if ((q - buf) < sizeof(buf) - 1)
1604 if (handle_stray_noerror() == 0)
1611 tcc_error("#error %s", buf);
1613 tcc_warning("#warning %s", buf);
1619 if (tok == TOK_LINEFEED || tok == '!' || tok == TOK_PPNUM) {
1620 /* '!' is ignored to allow C scripts. numbers are ignored
1621 to emulate cpp behaviour */
1623 if (!(saved_parse_flags & PARSE_FLAG_ASM_COMMENTS))
1624 tcc_warning("Ignoring unknown preprocessing directive #%s", get_tok_str(tok, &tokc));
1626 /* this is a gas line comment in an 'S' file. */
1627 file->buf_ptr = parse_line_comment(file->buf_ptr);
1633 /* ignore other preprocess commands or #! for C scripts */
1634 while (tok != TOK_LINEFEED)
1637 parse_flags = saved_parse_flags;
1640 /* evaluate escape codes in a string. */
1641 static void parse_escape_string(CString *outstr, const uint8_t *buf, int is_long)
1656 case '0': case '1': case '2': case '3':
1657 case '4': case '5': case '6': case '7':
1658 /* at most three octal digits */
1663 n = n * 8 + c - '0';
1667 n = n * 8 + c - '0';
1672 goto add_char_nonext;
1680 if (c >= 'a' && c <= 'f')
1682 else if (c >= 'A' && c <= 'F')
1692 goto add_char_nonext;
1716 goto invalid_escape;
1726 if (c >= '!' && c <= '~')
1727 tcc_warning("unknown escape sequence: \'\\%c\'", c);
1729 tcc_warning("unknown escape sequence: \'\\x%x\'", c);
1736 cstr_ccat(outstr, c);
1738 cstr_wccat(outstr, c);
1740 /* add a trailing '\0' */
1742 cstr_ccat(outstr, '\0');
1744 cstr_wccat(outstr, '\0');
1747 /* we use 64 bit numbers */
1750 /* bn = (bn << shift) | or_val */
1751 static void bn_lshift(unsigned int *bn, int shift, int or_val)
1755 for(i=0;i<BN_SIZE;i++) {
1757 bn[i] = (v << shift) | or_val;
1758 or_val = v >> (32 - shift);
1762 static void bn_zero(unsigned int *bn)
1765 for(i=0;i<BN_SIZE;i++) {
1770 /* parse number in null terminated string 'p' and return it in the
1772 static void parse_number(const char *p)
1774 int b, t, shift, frac_bits, s, exp_val, ch;
1776 unsigned int bn[BN_SIZE];
1787 goto float_frac_parse;
1788 } else if (t == '0') {
1789 if (ch == 'x' || ch == 'X') {
1793 } else if (tcc_ext && (ch == 'b' || ch == 'B')) {
1799 /* parse all digits. cannot check octal numbers at this stage
1800 because of floating point constants */
1802 if (ch >= 'a' && ch <= 'f')
1804 else if (ch >= 'A' && ch <= 'F')
1812 if (q >= token_buf + STRING_MAX_SIZE) {
1814 tcc_error("number too long");
1820 ((ch == 'e' || ch == 'E') && b == 10) ||
1821 ((ch == 'p' || ch == 'P') && (b == 16 || b == 2))) {
1823 /* NOTE: strtox should support that for hexa numbers, but
1824 non ISOC99 libcs do not support it, so we prefer to do
1826 /* hexadecimal or binary floats */
1827 /* XXX: handle overflows */
1839 } else if (t >= 'a') {
1841 } else if (t >= 'A') {
1846 bn_lshift(bn, shift, t);
1853 if (t >= 'a' && t <= 'f') {
1855 } else if (t >= 'A' && t <= 'F') {
1857 } else if (t >= '0' && t <= '9') {
1863 tcc_error("invalid digit");
1864 bn_lshift(bn, shift, t);
1869 if (ch != 'p' && ch != 'P')
1876 } else if (ch == '-') {
1880 if (ch < '0' || ch > '9')
1881 expect("exponent digits");
1882 while (ch >= '0' && ch <= '9') {
1883 exp_val = exp_val * 10 + ch - '0';
1886 exp_val = exp_val * s;
1888 /* now we can generate the number */
1889 /* XXX: should patch directly float number */
1890 d = (double)bn[1] * 4294967296.0 + (double)bn[0];
1891 d = ldexp(d, exp_val - frac_bits);
1896 /* float : should handle overflow */
1898 } else if (t == 'L') {
1900 #ifdef TCC_TARGET_PE
1905 /* XXX: not large enough */
1906 tokc.ld = (long double)d;
1913 /* decimal floats */
1915 if (q >= token_buf + STRING_MAX_SIZE)
1920 while (ch >= '0' && ch <= '9') {
1921 if (q >= token_buf + STRING_MAX_SIZE)
1927 if (ch == 'e' || ch == 'E') {
1928 if (q >= token_buf + STRING_MAX_SIZE)
1932 if (ch == '-' || ch == '+') {
1933 if (q >= token_buf + STRING_MAX_SIZE)
1938 if (ch < '0' || ch > '9')
1939 expect("exponent digits");
1940 while (ch >= '0' && ch <= '9') {
1941 if (q >= token_buf + STRING_MAX_SIZE)
1953 tokc.f = strtof(token_buf, NULL);
1954 } else if (t == 'L') {
1956 #ifdef TCC_TARGET_PE
1958 tokc.d = strtod(token_buf, NULL);
1961 tokc.ld = strtold(token_buf, NULL);
1965 tokc.d = strtod(token_buf, NULL);
1969 unsigned long long n, n1;
1972 /* integer number */
1975 if (b == 10 && *q == '0') {
1982 /* no need for checks except for base 10 / 8 errors */
1985 } else if (t >= 'a') {
1987 } else if (t >= 'A') {
1992 tcc_error("invalid digit");
1996 /* detect overflow */
1997 /* XXX: this test is not reliable */
1999 tcc_error("integer constant overflow");
2002 /* XXX: not exactly ANSI compliant */
2003 if ((n & 0xffffffff00000000LL) != 0) {
2008 } else if (n > 0x7fffffff) {
2019 tcc_error("three 'l's in integer constant");
2021 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
2024 if (tok == TOK_CINT)
2026 else if (tok == TOK_CUINT)
2028 #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
2032 } else if (t == 'U') {
2034 tcc_error("two 'u's in integer constant");
2036 if (tok == TOK_CINT)
2038 else if (tok == TOK_CLLONG)
2045 if (tok == TOK_CINT || tok == TOK_CUINT)
2051 tcc_error("invalid number\n");
2055 #define PARSE2(c1, tok1, c2, tok2) \
2066 /* return next token without macro substitution */
2067 static inline void next_nomacro1(void)
2082 goto keep_tok_flags;
2089 /* first look if it is in fact an end of buffer */
2090 if (p >= file->buf_end) {
2094 if (p >= file->buf_end)
2107 TCCState *s1 = tcc_state;
2108 if ((parse_flags & PARSE_FLAG_LINEFEED)
2109 && !(tok_flags & TOK_FLAG_EOF)) {
2110 tok_flags |= TOK_FLAG_EOF;
2112 goto keep_tok_flags;
2113 } else if (!(parse_flags & PARSE_FLAG_PREPROCESS)) {
2115 } else if (s1->ifdef_stack_ptr != file->ifdef_stack_ptr) {
2116 tcc_error("missing #endif");
2117 } else if (s1->include_stack_ptr == s1->include_stack) {
2118 /* no include left : end of file. */
2121 tok_flags &= ~TOK_FLAG_EOF;
2122 /* pop include file */
2124 /* test if previous '#endif' was after a #ifdef at
2126 if (tok_flags & TOK_FLAG_ENDIF) {
2128 printf("#endif %s\n", get_tok_str(file->ifndef_macro_saved, NULL));
2130 add_cached_include(s1, file->filename, file->ifndef_macro_saved);
2131 tok_flags &= ~TOK_FLAG_ENDIF;
2134 /* add end of include file debug info */
2135 if (tcc_state->do_debug) {
2136 put_stabd(N_EINCL, 0, 0);
2138 /* pop include stack */
2140 s1->include_stack_ptr--;
2149 tok_flags |= TOK_FLAG_BOL;
2152 if (0 == (parse_flags & PARSE_FLAG_LINEFEED))
2155 goto keep_tok_flags;
2160 if ((tok_flags & TOK_FLAG_BOL) &&
2161 (parse_flags & PARSE_FLAG_PREPROCESS)) {
2163 preprocess(tok_flags & TOK_FLAG_BOF);
2169 tok = TOK_TWOSHARPS;
2171 if (parse_flags & PARSE_FLAG_ASM_COMMENTS) {
2172 p = parse_line_comment(p - 1);
2181 case 'a': case 'b': case 'c': case 'd':
2182 case 'e': case 'f': case 'g': case 'h':
2183 case 'i': case 'j': case 'k': case 'l':
2184 case 'm': case 'n': case 'o': case 'p':
2185 case 'q': case 'r': case 's': case 't':
2186 case 'u': case 'v': case 'w': case 'x':
2188 case 'A': case 'B': case 'C': case 'D':
2189 case 'E': case 'F': case 'G': case 'H':
2190 case 'I': case 'J': case 'K':
2191 case 'M': case 'N': case 'O': case 'P':
2192 case 'Q': case 'R': case 'S': case 'T':
2193 case 'U': case 'V': case 'W': case 'X':
2199 h = TOK_HASH_FUNC(h, c);
2203 if (!isidnum_table[c-CH_EOF])
2205 h = TOK_HASH_FUNC(h, c);
2212 /* fast case : no stray found, so we have the full token
2213 and we have already hashed it */
2215 h &= (TOK_HASH_SIZE - 1);
2216 pts = &hash_ident[h];
2221 if (ts->len == len && !memcmp(ts->str, p1, len))
2223 pts = &(ts->hash_next);
2225 ts = tok_alloc_new(pts, p1, len);
2229 cstr_reset(&tokcstr);
2232 cstr_ccat(&tokcstr, *p1);
2238 while (isidnum_table[c-CH_EOF]) {
2239 cstr_ccat(&tokcstr, c);
2242 ts = tok_alloc(tokcstr.data, tokcstr.size);
2248 if (t != '\\' && t != '\'' && t != '\"') {
2250 goto parse_ident_fast;
2253 if (c == '\'' || c == '\"') {
2257 cstr_reset(&tokcstr);
2258 cstr_ccat(&tokcstr, 'L');
2259 goto parse_ident_slow;
2263 case '0': case '1': case '2': case '3':
2264 case '4': case '5': case '6': case '7':
2267 cstr_reset(&tokcstr);
2268 /* after the first digit, accept digits, alpha, '.' or sign if
2269 prefixed by 'eEpP' */
2273 cstr_ccat(&tokcstr, c);
2275 if (!(isnum(c) || isid(c) || c == '.' ||
2276 ((c == '+' || c == '-') &&
2277 (t == 'e' || t == 'E' || t == 'p' || t == 'P'))))
2280 /* We add a trailing '\0' to ease parsing */
2281 cstr_ccat(&tokcstr, '\0');
2282 tokc.cstr = &tokcstr;
2286 /* special dot handling because it can also start a number */
2289 cstr_reset(&tokcstr);
2290 cstr_ccat(&tokcstr, '.');
2292 } else if (c == '.') {
2312 /* parse the string */
2314 p = parse_pp_string(p, sep, &str);
2315 cstr_ccat(&str, '\0');
2317 /* eval the escape (should be done as TOK_PPNUM) */
2318 cstr_reset(&tokcstr);
2319 parse_escape_string(&tokcstr, str.data, is_long);
2324 /* XXX: make it portable */
2328 char_size = sizeof(nwchar_t);
2329 if (tokcstr.size <= char_size)
2330 tcc_error("empty character constant");
2331 if (tokcstr.size > 2 * char_size)
2332 tcc_warning("multi-character character constant");
2334 tokc.i = *(int8_t *)tokcstr.data;
2337 tokc.i = *(nwchar_t *)tokcstr.data;
2341 tokc.cstr = &tokcstr;
2355 } else if (c == '<') {
2373 } else if (c == '>') {
2391 } else if (c == '=') {
2404 } else if (c == '=') {
2417 } else if (c == '=') {
2430 } else if (c == '=') {
2433 } else if (c == '>') {
2441 PARSE2('!', '!', '=', TOK_NE)
2442 PARSE2('=', '=', '=', TOK_EQ)
2443 PARSE2('*', '*', '=', TOK_A_MUL)
2444 PARSE2('%', '%', '=', TOK_A_MOD)
2445 PARSE2('^', '^', '=', TOK_A_XOR)
2447 /* comments or operator */
2451 p = parse_comment(p);
2452 /* comments replaced by a blank */
2454 goto keep_tok_flags;
2455 } else if (c == '/') {
2456 p = parse_line_comment(p);
2458 goto keep_tok_flags;
2459 } else if (c == '=') {
2479 case '$': /* only used in assembler */
2480 case '@': /* dito */
2485 tcc_error("unrecognized character \\x%02x", c);
2491 #if defined(PARSE_DEBUG)
2492 printf("token = %s\n", get_tok_str(tok, &tokc));
2496 /* return next token without macro substitution. Can read input from
2498 static void next_nomacro_spc(void)
2504 TOK_GET(&tok, ¯o_ptr, &tokc);
2505 if (tok == TOK_LINENUM) {
2506 file->line_num = tokc.i;
2515 ST_FUNC void next_nomacro(void)
2519 } while (is_space(tok));
2522 /* substitute args in macro_str and return allocated string */
2523 static int *macro_arg_subst(Sym **nested_list, const int *macro_str, Sym *args)
2525 int last_tok, t, spc;
2535 TOK_GET(&t, ¯o_str, &cval);
2540 TOK_GET(&t, ¯o_str, &cval);
2543 s = sym_find2(args, t);
2549 TOK_GET(&t, &st, &cval);
2550 if (!check_space(t, &spc))
2551 cstr_cat(&cstr, get_tok_str(t, &cval));
2554 cstr_ccat(&cstr, '\0');
2556 printf("stringize: %s\n", (char *)cstr.data);
2560 tok_str_add2(&str, TOK_STR, &cval);
2563 tok_str_add2(&str, t, &cval);
2565 } else if (t >= TOK_IDENT) {
2566 s = sym_find2(args, t);
2569 /* if '##' is present before or after, no arg substitution */
2570 if (*macro_str == TOK_TWOSHARPS || last_tok == TOK_TWOSHARPS) {
2571 /* special case for var arg macros : ## eats the
2572 ',' if empty VA_ARGS variable. */
2573 /* XXX: test of the ',' is not 100%
2574 reliable. should fix it to avoid security
2576 if (gnu_ext && s->type.t &&
2577 last_tok == TOK_TWOSHARPS &&
2578 str.len >= 2 && str.str[str.len - 2] == ',') {
2580 /* suppress ',' '##' */
2583 /* suppress '##' and add variable */
2591 TOK_GET(&t1, &st, &cval);
2594 tok_str_add2(&str, t1, &cval);
2598 /* NOTE: the stream cannot be read when macro
2599 substituing an argument */
2600 macro_subst(&str, nested_list, st, NULL);
2603 tok_str_add(&str, t);
2606 tok_str_add2(&str, t, &cval);
2610 tok_str_add(&str, 0);
2614 static char const ab_month_name[12][4] =
2616 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
2617 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
2620 /* do macro substitution of current token with macro 's' and add
2621 result to (tok_str,tok_len). 'nested_list' is the list of all
2622 macros we got inside to avoid recursing. Return non zero if no
2623 substitution needs to be done */
2624 static int macro_subst_tok(TokenString *tok_str,
2625 Sym **nested_list, Sym *s, struct macro_level **can_read_stream)
2627 Sym *args, *sa, *sa1;
2628 int mstr_allocated, parlevel, *mstr, t, t1, spc;
2636 /* if symbol is a macro, prepare substitution */
2637 /* special macros */
2638 if (tok == TOK___LINE__) {
2639 snprintf(buf, sizeof(buf), "%d", file->line_num);
2643 } else if (tok == TOK___FILE__) {
2644 cstrval = file->filename;
2646 } else if (tok == TOK___DATE__ || tok == TOK___TIME__) {
2651 tm = localtime(&ti);
2652 if (tok == TOK___DATE__) {
2653 snprintf(buf, sizeof(buf), "%s %2d %d",
2654 ab_month_name[tm->tm_mon], tm->tm_mday, tm->tm_year + 1900);
2656 snprintf(buf, sizeof(buf), "%02d:%02d:%02d",
2657 tm->tm_hour, tm->tm_min, tm->tm_sec);
2664 cstr_cat(&cstr, cstrval);
2665 cstr_ccat(&cstr, '\0');
2667 tok_str_add2(tok_str, t1, &cval);
2672 if (s->type.t == MACRO_FUNC) {
2673 /* NOTE: we do not use next_nomacro to avoid eating the
2674 next token. XXX: find better solution */
2678 while (is_space(t = *p) || TOK_LINEFEED == t)
2680 if (t == 0 && can_read_stream) {
2681 /* end of macro stream: we must look at the token
2682 after in the file */
2683 struct macro_level *ml = *can_read_stream;
2689 *can_read_stream = ml -> prev;
2691 /* also, end of scope for nested defined symbol */
2692 (*nested_list)->v = -1;
2696 ch = file->buf_ptr[0];
2697 while (is_space(ch) || ch == '\n' || ch == '/')
2702 uint8_t *p = file->buf_ptr;
2705 p = parse_comment(p);
2706 file->buf_ptr = p - 1;
2707 } else if (c == '/') {
2708 p = parse_line_comment(p);
2709 file->buf_ptr = p - 1;
2717 if (t != '(') /* no macro subst */
2720 /* argument macro */
2725 /* NOTE: empty args are allowed, except if no args */
2727 /* handle '()' case */
2728 if (!args && !sa && tok == ')')
2731 tcc_error("macro '%s' used with too many args",
2732 get_tok_str(s->v, 0));
2735 /* NOTE: non zero sa->t indicates VA_ARGS */
2736 while ((parlevel > 0 ||
2738 (tok != ',' || sa->type.t))) &&
2742 else if (tok == ')')
2744 if (tok == TOK_LINEFEED)
2746 if (!check_space(tok, &spc))
2747 tok_str_add2(&str, tok, &tokc);
2751 tok_str_add(&str, 0);
2752 sa1 = sym_push2(&args, sa->v & ~SYM_FIELD, sa->type.t, 0);
2756 /* special case for gcc var args: add an empty
2757 var arg argument if it is omitted */
2758 if (sa && sa->type.t && gnu_ext)
2768 tcc_error("macro '%s' used with too few args",
2769 get_tok_str(s->v, 0));
2772 /* now subst each arg */
2773 mstr = macro_arg_subst(nested_list, mstr, args);
2778 tok_str_free(sa->d);
2784 sym_push2(nested_list, s->v, 0, 0);
2785 macro_subst(tok_str, nested_list, mstr, can_read_stream);
2786 /* pop nested defined symbol */
2788 *nested_list = sa1->prev;
2796 /* handle the '##' operator. Return NULL if no '##' seen. Otherwise
2797 return the resulting string (which must be freed). */
2798 static inline int *macro_twosharps(const int *macro_str)
2802 TokenString macro_str1;
2804 int n, start_of_nosubsts;
2806 /* we search the first '##' */
2807 for(ptr = macro_str;;) {
2809 TOK_GET(&t, &ptr, &cval);
2810 if (t == TOK_TWOSHARPS)
2812 /* nothing more to do if end of string */
2817 /* we saw '##', so we need more processing to handle it */
2818 start_of_nosubsts = -1;
2819 tok_str_new(¯o_str1);
2820 for(ptr = macro_str;;) {
2821 TOK_GET(&tok, &ptr, &tokc);
2824 if (tok == TOK_TWOSHARPS)
2826 if (tok == TOK_NOSUBST && start_of_nosubsts < 0)
2827 start_of_nosubsts = macro_str1.len;
2828 while (*ptr == TOK_TWOSHARPS) {
2829 /* given 'a##b', remove nosubsts preceding 'a' */
2830 if (start_of_nosubsts >= 0)
2831 macro_str1.len = start_of_nosubsts;
2832 /* given 'a##b', skip '##' */
2834 /* given 'a##b', remove nosubsts preceding 'b' */
2835 while (t == TOK_NOSUBST)
2837 if (t && t != TOK_TWOSHARPS) {
2839 TOK_GET(&t, &ptr, &cval);
2840 /* We concatenate the two tokens */
2842 cstr_cat(&cstr, get_tok_str(tok, &tokc));
2844 cstr_cat(&cstr, get_tok_str(t, &cval));
2845 cstr_ccat(&cstr, '\0');
2847 tcc_open_bf(tcc_state, ":paste:", cstr.size);
2848 memcpy(file->buffer, cstr.data, cstr.size);
2851 if (0 == *file->buf_ptr)
2853 tok_str_add2(¯o_str1, tok, &tokc);
2854 tcc_warning("pasting \"%.*s\" and \"%s\" does not give a valid preprocessing token",
2855 n, cstr.data, (char*)cstr.data + n);
2861 if (tok != TOK_NOSUBST)
2862 start_of_nosubsts = -1;
2863 tok_str_add2(¯o_str1, tok, &tokc);
2865 tok_str_add(¯o_str1, 0);
2866 return macro_str1.str;
2870 /* do macro substitution of macro_str and add result to
2871 (tok_str,tok_len). 'nested_list' is the list of all macros we got
2872 inside to avoid recursing. */
2873 static void macro_subst(TokenString *tok_str, Sym **nested_list,
2874 const int *macro_str, struct macro_level ** can_read_stream)
2881 struct macro_level ml;
2884 /* first scan for '##' operator handling */
2886 macro_str1 = macro_twosharps(ptr);
2894 /* NOTE: ptr == NULL can only happen if tokens are read from
2895 file stream due to a macro function call */
2898 TOK_GET(&t, &ptr, &cval);
2901 if (t == TOK_NOSUBST) {
2902 /* following token has already been subst'd. just copy it on */
2903 tok_str_add2(tok_str, TOK_NOSUBST, NULL);
2904 TOK_GET(&t, &ptr, &cval);
2909 /* if nested substitution, do nothing */
2910 if (sym_find2(*nested_list, t)) {
2911 /* and mark it as TOK_NOSUBST, so it doesn't get subst'd again */
2912 tok_str_add2(tok_str, TOK_NOSUBST, NULL);
2916 if (can_read_stream)
2917 ml.prev = *can_read_stream, *can_read_stream = &ml;
2918 macro_ptr = (int *)ptr;
2920 ret = macro_subst_tok(tok_str, nested_list, s, can_read_stream);
2921 ptr = (int *)macro_ptr;
2923 if (can_read_stream && *can_read_stream == &ml)
2924 *can_read_stream = ml.prev;
2927 if (parse_flags & PARSE_FLAG_SPACES)
2932 tok_str_add(tok_str, ' ');
2936 if (!check_space(t, &spc))
2937 tok_str_add2(tok_str, t, &cval);
2941 tok_str_free(macro_str1);
2944 /* return next token with macro substitution */
2945 ST_FUNC void next(void)
2947 Sym *nested_list, *s;
2949 struct macro_level *ml;
2952 if (parse_flags & PARSE_FLAG_SPACES)
2957 /* if not reading from macro substituted string, then try
2958 to substitute macros */
2959 if (tok >= TOK_IDENT &&
2960 (parse_flags & PARSE_FLAG_PREPROCESS)) {
2961 s = define_find(tok);
2963 /* we have a macro: we try to substitute */
2967 if (macro_subst_tok(&str, &nested_list, s, &ml) == 0) {
2968 /* substitution done, NOTE: maybe empty */
2969 tok_str_add(&str, 0);
2970 macro_ptr = str.str;
2971 macro_ptr_allocated = str.str;
2978 /* end of macro or end of unget buffer */
2979 if (unget_buffer_enabled) {
2980 macro_ptr = unget_saved_macro_ptr;
2981 unget_buffer_enabled = 0;
2983 /* end of macro string: free it */
2984 tok_str_free(macro_ptr_allocated);
2985 macro_ptr_allocated = NULL;
2989 } else if (tok == TOK_NOSUBST) {
2990 /* discard preprocessor's nosubst markers */
2995 /* convert preprocessor tokens into C tokens */
2996 if (tok == TOK_PPNUM &&
2997 (parse_flags & PARSE_FLAG_TOK_NUM)) {
2998 parse_number((char *)tokc.cstr->data);
3002 /* push back current token and set current token to 'last_tok'. Only
3003 identifier case handled for labels. */
3004 ST_INLN void unget_tok(int last_tok)
3008 if (unget_buffer_enabled)
3010 /* assert(macro_ptr == unget_saved_buffer + 1);
3011 assert(*macro_ptr == 0); */
3015 unget_saved_macro_ptr = macro_ptr;
3016 unget_buffer_enabled = 1;
3018 q = unget_saved_buffer;
3021 n = tok_ext_size(tok) - 1;
3024 *q = 0; /* end of token string */
3029 /* better than nothing, but needs extension to handle '-E' option
3031 ST_FUNC void preprocess_init(TCCState *s1)
3033 s1->include_stack_ptr = s1->include_stack;
3034 /* XXX: move that before to avoid having to initialize
3035 file->ifdef_stack_ptr ? */
3036 s1->ifdef_stack_ptr = s1->ifdef_stack;
3037 file->ifdef_stack_ptr = s1->ifdef_stack_ptr;
3040 s1->pack_stack[0] = 0;
3041 s1->pack_stack_ptr = s1->pack_stack;
3044 ST_FUNC void preprocess_new(void)
3049 /* init isid table */
3050 for(i=CH_EOF;i<256;i++)
3051 isidnum_table[i-CH_EOF] = isid(i) || isnum(i);
3053 /* add all tokens */
3055 memset(hash_ident, 0, TOK_HASH_SIZE * sizeof(TokenSym *));
3057 tok_ident = TOK_IDENT;
3066 tok_alloc(p, r - p - 1);
3071 /* Preprocess the current file */
3072 ST_FUNC int tcc_preprocess(TCCState *s1)
3076 BufferedFile *file_ref, **iptr, **iptr_new;
3077 int token_seen, line_ref, d;
3080 preprocess_init(s1);
3081 define_start = define_stack;
3082 ch = file->buf_ptr[0];
3083 tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
3084 parse_flags = PARSE_FLAG_ASM_COMMENTS | PARSE_FLAG_PREPROCESS |
3085 PARSE_FLAG_LINEFEED | PARSE_FLAG_SPACES;
3089 iptr = s1->include_stack_ptr;
3093 if (tok == TOK_EOF) {
3095 } else if (file != file_ref) {
3097 } else if (tok == TOK_LINEFEED) {
3102 } else if (!token_seen) {
3103 d = file->line_num - line_ref;
3104 if (file != file_ref || d < 0 || d >= 8) {
3106 iptr_new = s1->include_stack_ptr;
3107 s = iptr_new > iptr ? " 1"
3108 : iptr_new < iptr ? " 2"
3109 : iptr_new > s1->include_stack ? " 3"
3113 fprintf(s1->ppfp, "# %d \"%s\"%s\n", file->line_num, file->filename, s);
3116 fputs("\n", s1->ppfp), --d;
3118 line_ref = (file_ref = file)->line_num;
3119 token_seen = tok != TOK_LINEFEED;
3123 fputs(get_tok_str(tok, &tokc), s1->ppfp);
3125 free_defines(define_start);