/* * TCC - Tiny C Compiler * * Copyright (c) 2001-2004 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "tcc.h" /********************************************************/ /* global variables */ ST_DATA int tok_flags; ST_DATA int parse_flags; ST_DATA struct BufferedFile *file; ST_DATA int ch, tok; ST_DATA CValue tokc; ST_DATA const int *macro_ptr; ST_DATA CString tokcstr; /* current parsed string, if any */ /* display benchmark infos */ ST_DATA int total_lines; ST_DATA int total_bytes; ST_DATA int tok_ident; ST_DATA TokenSym **table_ident; /* ------------------------------------------------------------------------- */ static TokenSym *hash_ident[TOK_HASH_SIZE]; static char token_buf[STRING_MAX_SIZE + 1]; static CString cstr_buf; static TokenString tokstr_buf; static unsigned char isidnum_table[256 - CH_EOF]; static int pp_debug_tok, pp_debug_symv; static int pp_once; static void tok_print(const char *msg, const int *str); static struct TinyAlloc *toksym_alloc; static struct TinyAlloc *tokstr_alloc; static struct TinyAlloc *cstr_alloc; /* isidnum_table flags: */ #define IS_SPC 1 #define IS_ID 2 #define IS_NUM 4 static TokenString *macro_stack; static const char tcc_keywords[] = #define DEF(id, str) str "\0" #include "tcctok.h" #undef DEF ; /* WARNING: the content of this string encodes token numbers */ static const unsigned char tok_two_chars[] = /* outdated -- gr "<=\236>=\235!=\225&&\240||\241++\244--\242==\224<<\1>>\2+=\253" "-=\255*=\252/=\257%=\245&=\246^=\336|=\374->\313..\250##\266"; */{ '<','=', TOK_LE, '>','=', TOK_GE, '!','=', TOK_NE, '&','&', TOK_LAND, '|','|', TOK_LOR, '+','+', TOK_INC, '-','-', TOK_DEC, '=','=', TOK_EQ, '<','<', TOK_SHL, '>','>', TOK_SAR, '+','=', TOK_A_ADD, '-','=', TOK_A_SUB, '*','=', TOK_A_MUL, '/','=', TOK_A_DIV, '%','=', TOK_A_MOD, '&','=', TOK_A_AND, '^','=', TOK_A_XOR, '|','=', TOK_A_OR, '-','>', TOK_ARROW, '.','.', 0xa8, // C++ token ? '#','#', TOK_TWOSHARPS, 0 }; static void next_nomacro_spc(void); ST_FUNC void skip(int c) { if (tok != c) tcc_error("'%c' expected (got \"%s\")", c, get_tok_str(tok, &tokc)); next(); } ST_FUNC void expect(const char *msg) { tcc_error("%s expected", msg); } /* ------------------------------------------------------------------------- */ /* Custom allocator for tiny objects */ #define USE_TAL #ifndef USE_TAL #define tal_free(al, p) tcc_free(p) #define tal_realloc(al, p, size) tcc_realloc(p, size) #define tal_new(a,b,c) #define tal_delete(a) #else #if !defined(MEM_DEBUG) #define tal_free(al, p) tal_free_impl(al, p) #define tal_realloc(al, p, size) tal_realloc_impl(&al, p, size) #define TAL_DEBUG_PARAMS #else #define TAL_DEBUG 1 #define tal_free(al, p) tal_free_impl(al, p, __FILE__, __LINE__) #define tal_realloc(al, p, size) tal_realloc_impl(&al, p, size, __FILE__, __LINE__) #define TAL_DEBUG_PARAMS , const char *file, int line #define TAL_DEBUG_FILE_LEN 15 #endif //#define TAL_INFO 1 /* collect and dump allocators stats */ typedef struct TinyAlloc { size_t limit; size_t size; uint8_t *buffer; uint8_t *p; size_t nb_allocs; struct TinyAlloc *next, *top; #ifdef TAL_INFO size_t nb_peak; size_t nb_total; size_t nb_missed; uint8_t *peak_p; #endif } TinyAlloc; typedef struct tal_header_t { size_t size; #ifdef TAL_DEBUG int line_num; /* negative line_num used for double free check */ char file_name[TAL_DEBUG_FILE_LEN + 1]; #endif } tal_header_t; /* ------------------------------------------------------------------------- */ ST_FUNC TinyAlloc *tal_new(TinyAlloc **pal, size_t limit, size_t size) { TinyAlloc *al = tcc_mallocz(sizeof(TinyAlloc)); al->p = al->buffer = tcc_malloc(size); al->limit = limit; al->size = size; if (pal) *pal = al; return al; } ST_FUNC void tal_delete(TinyAlloc *al) { TinyAlloc *next; tail_call: if (!al) return; #ifdef TAL_INFO fprintf(stderr, "limit=%5d, size=%5g MB, nb_peak=%6d, nb_total=%8d, nb_missed=%6d, usage=%5.1f%%\n", al->limit, al->size / 1024.0 / 1024.0, al->nb_peak, al->nb_total, al->nb_missed, (al->peak_p - al->buffer) * 100.0 / al->size); #endif #ifdef TAL_DEBUG if (al->nb_allocs > 0) { uint8_t *p; fprintf(stderr, "TAL_DEBUG: mem leak %d chunks (limit= %d)\n", al->nb_allocs, al->limit); p = al->buffer; while (p < al->p) { tal_header_t *header = (tal_header_t *)p; if (header->line_num > 0) { fprintf(stderr, " file %s, line %u: %u bytes\n", header->file_name, header->line_num, header->size); } p += header->size + sizeof(tal_header_t); } } #endif next = al->next; tcc_free(al->buffer); tcc_free(al); al = next; goto tail_call; } ST_FUNC void tal_free_impl(TinyAlloc *al, void *p TAL_DEBUG_PARAMS) { if (!p) return; tail_call: if (al->buffer <= (uint8_t *)p && (uint8_t *)p < al->buffer + al->size) { #ifdef TAL_DEBUG tal_header_t *header = (((tal_header_t *)p) - 1); if (header->line_num < 0) { fprintf(stderr, "TAL_DEBUG: file %s, line %u double frees chunk from\n", file, line); fprintf(stderr, " file %s, line %u: %u bytes\n", header->file_name, -header->line_num, header->size); } else header->line_num = -header->line_num; #endif al->nb_allocs--; if (!al->nb_allocs) al->p = al->buffer; } else if (al->next) { al = al->next; goto tail_call; } else tcc_free(p); } ST_FUNC void *tal_realloc_impl(TinyAlloc **pal, void *p, size_t size TAL_DEBUG_PARAMS) { tal_header_t *header; void *ret; int is_own; size_t adj_size = (size + 3) & -4; TinyAlloc *al = *pal; tail_call: is_own = (al->buffer <= (uint8_t *)p && (uint8_t *)p < al->buffer + al->size); if ((!p || is_own) && size <= al->limit) { if (al->p + adj_size + sizeof(tal_header_t) < al->buffer + al->size) { header = (tal_header_t *)al->p; header->size = adj_size; #ifdef TAL_DEBUG { int ofs = strlen(file) - TAL_DEBUG_FILE_LEN; strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), TAL_DEBUG_FILE_LEN); header->file_name[TAL_DEBUG_FILE_LEN] = 0; header->line_num = line; } #endif ret = al->p + sizeof(tal_header_t); al->p += adj_size + sizeof(tal_header_t); if (is_own) { header = (((tal_header_t *)p) - 1); memcpy(ret, p, header->size); #ifdef TAL_DEBUG header->line_num = -header->line_num; #endif } else { al->nb_allocs++; } #ifdef TAL_INFO if (al->nb_peak < al->nb_allocs) al->nb_peak = al->nb_allocs; if (al->peak_p < al->p) al->peak_p = al->p; al->nb_total++; #endif return ret; } else if (is_own) { al->nb_allocs--; ret = tal_realloc(*pal, 0, size); header = (((tal_header_t *)p) - 1); memcpy(ret, p, header->size); #ifdef TAL_DEBUG header->line_num = -header->line_num; #endif return ret; } if (al->next) { al = al->next; } else { TinyAlloc *bottom = al, *next = al->top ? al->top : al; al = tal_new(pal, next->limit, next->size * 2); al->next = next; bottom->top = al; } goto tail_call; } if (is_own) { al->nb_allocs--; ret = tcc_malloc(size); header = (((tal_header_t *)p) - 1); memcpy(ret, p, header->size); #ifdef TAL_DEBUG header->line_num = -header->line_num; #endif } else if (al->next) { al = al->next; goto tail_call; } else ret = tcc_realloc(p, size); #ifdef TAL_INFO al->nb_missed++; #endif return ret; } #endif /* USE_TAL */ /* ------------------------------------------------------------------------- */ /* CString handling */ static void cstr_realloc(CString *cstr, int new_size) { int size; size = cstr->size_allocated; if (size < 8) size = 8; /* no need to allocate a too small first string */ while (size < new_size) size = size * 2; cstr->data = tal_realloc(cstr_alloc, cstr->data, size); cstr->size_allocated = size; } /* add a byte */ ST_INLN void cstr_ccat(CString *cstr, int ch) { int size; size = cstr->size + 1; if (size > cstr->size_allocated) cstr_realloc(cstr, size); ((unsigned char *)cstr->data)[size - 1] = ch; cstr->size = size; } ST_FUNC void cstr_cat(CString *cstr, const char *str, int len) { int size; if (len <= 0) len = strlen(str) + 1 + len; size = cstr->size + len; if (size > cstr->size_allocated) cstr_realloc(cstr, size); memmove(((unsigned char *)cstr->data) + cstr->size, str, len); cstr->size = size; } /* add a wide char */ ST_FUNC void cstr_wccat(CString *cstr, int ch) { int size; size = cstr->size + sizeof(nwchar_t); if (size > cstr->size_allocated) cstr_realloc(cstr, size); *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch; cstr->size = size; } ST_FUNC void cstr_new(CString *cstr) { memset(cstr, 0, sizeof(CString)); } /* free string and reset it to NULL */ ST_FUNC void cstr_free(CString *cstr) { tal_free(cstr_alloc, cstr->data); cstr_new(cstr); } /* reset string to empty */ ST_FUNC void cstr_reset(CString *cstr) { cstr->size = 0; } /* XXX: unicode ? */ static void add_char(CString *cstr, int c) { if (c == '\'' || c == '\"' || c == '\\') { /* XXX: could be more precise if char or string */ cstr_ccat(cstr, '\\'); } if (c >= 32 && c <= 126) { cstr_ccat(cstr, c); } else { cstr_ccat(cstr, '\\'); if (c == '\n') { cstr_ccat(cstr, 'n'); } else { cstr_ccat(cstr, '0' + ((c >> 6) & 7)); cstr_ccat(cstr, '0' + ((c >> 3) & 7)); cstr_ccat(cstr, '0' + (c & 7)); } } } /* ------------------------------------------------------------------------- */ /* allocate a new token */ static TokenSym *tok_alloc_new(TokenSym **pts, const char *str, int len) { TokenSym *ts, **ptable; int i; if (tok_ident >= SYM_FIRST_ANOM) tcc_error("memory full (symbols)"); /* expand token table if needed */ i = tok_ident - TOK_IDENT; if ((i % TOK_ALLOC_INCR) == 0) { ptable = tcc_realloc(table_ident, (i + TOK_ALLOC_INCR) * sizeof(TokenSym *)); table_ident = ptable; } ts = tal_realloc(toksym_alloc, 0, sizeof(TokenSym) + len); table_ident[i] = ts; ts->tok = tok_ident++; ts->sym_define = NULL; ts->sym_label = NULL; ts->sym_struct = NULL; ts->sym_identifier = NULL; ts->len = len; ts->hash_next = NULL; memcpy(ts->str, str, len); ts->str[len] = '\0'; *pts = ts; return ts; } #define TOK_HASH_INIT 1 #define TOK_HASH_FUNC(h, c) ((h) + ((h) << 5) + ((h) >> 27) + (c)) /* find a token and add it if not found */ ST_FUNC TokenSym *tok_alloc(const char *str, int len) { TokenSym *ts, **pts; int i; unsigned int h; h = TOK_HASH_INIT; for(i=0;ilen == len && !memcmp(ts->str, str, len)) return ts; pts = &(ts->hash_next); } return tok_alloc_new(pts, str, len); } /* XXX: buffer overflow */ /* XXX: float tokens */ ST_FUNC const char *get_tok_str(int v, CValue *cv) { char *p; int i, len; cstr_reset(&cstr_buf); p = cstr_buf.data; switch(v) { case TOK_CINT: case TOK_CUINT: case TOK_CLLONG: case TOK_CULLONG: /* XXX: not quite exact, but only useful for testing */ #ifdef _WIN32 sprintf(p, "%u", (unsigned)cv->i); #else sprintf(p, "%llu", (unsigned long long)cv->i); #endif break; case TOK_LCHAR: cstr_ccat(&cstr_buf, 'L'); case TOK_CCHAR: cstr_ccat(&cstr_buf, '\''); add_char(&cstr_buf, cv->i); cstr_ccat(&cstr_buf, '\''); cstr_ccat(&cstr_buf, '\0'); break; case TOK_PPNUM: case TOK_PPSTR: return (char*)cv->str.data; case TOK_LSTR: cstr_ccat(&cstr_buf, 'L'); case TOK_STR: cstr_ccat(&cstr_buf, '\"'); if (v == TOK_STR) { len = cv->str.size - 1; for(i=0;istr.data)[i]); } else { len = (cv->str.size / sizeof(nwchar_t)) - 1; for(i=0;istr.data)[i]); } cstr_ccat(&cstr_buf, '\"'); cstr_ccat(&cstr_buf, '\0'); break; case TOK_CFLOAT: cstr_cat(&cstr_buf, "", 0); break; case TOK_CDOUBLE: cstr_cat(&cstr_buf, "", 0); break; case TOK_CLDOUBLE: cstr_cat(&cstr_buf, "", 0); break; case TOK_LINENUM: cstr_cat(&cstr_buf, "", 0); break; /* above tokens have value, the ones below don't */ case TOK_LT: v = '<'; goto addv; case TOK_GT: v = '>'; goto addv; case TOK_DOTS: return strcpy(p, "..."); case TOK_A_SHL: return strcpy(p, "<<="); case TOK_A_SAR: return strcpy(p, ">>="); default: if (v < TOK_IDENT) { /* search in two bytes table */ const unsigned char *q = tok_two_chars; while (*q) { if (q[2] == v) { *p++ = q[0]; *p++ = q[1]; *p = '\0'; return cstr_buf.data; } q += 3; } if (v >= 127) { sprintf(cstr_buf.data, "<%02x>", v); return cstr_buf.data; } addv: *p++ = v; *p = '\0'; } else if (v < tok_ident) { return table_ident[v - TOK_IDENT]->str; } else if (v >= SYM_FIRST_ANOM) { /* special name for anonymous symbol */ sprintf(p, "L.%u", v - SYM_FIRST_ANOM); } else { /* should never happen */ return NULL; } break; } return cstr_buf.data; } /* return the current character, handling end of block if necessary (but not stray) */ ST_FUNC int handle_eob(void) { BufferedFile *bf = file; int len; /* only tries to read if really end of buffer */ if (bf->buf_ptr >= bf->buf_end) { if (bf->fd != -1) { #if defined(PARSE_DEBUG) len = 1; #else len = IO_BUF_SIZE; #endif len = read(bf->fd, bf->buffer, len); if (len < 0) len = 0; } else { len = 0; } total_bytes += len; bf->buf_ptr = bf->buffer; bf->buf_end = bf->buffer + len; *bf->buf_end = CH_EOB; } if (bf->buf_ptr < bf->buf_end) { return bf->buf_ptr[0]; } else { bf->buf_ptr = bf->buf_end; return CH_EOF; } } /* read next char from current input file and handle end of input buffer */ ST_INLN void inp(void) { ch = *(++(file->buf_ptr)); /* end of buffer/file handling */ if (ch == CH_EOB) ch = handle_eob(); } /* handle '\[\r]\n' */ static int handle_stray_noerror(void) { while (ch == '\\') { inp(); if (ch == '\n') { file->line_num++; inp(); } else if (ch == '\r') { inp(); if (ch != '\n') goto fail; file->line_num++; inp(); } else { fail: return 1; } } return 0; } static void handle_stray(void) { if (handle_stray_noerror()) tcc_error("stray '\\' in program"); } /* skip the stray and handle the \\n case. Output an error if incorrect char after the stray */ static int handle_stray1(uint8_t *p) { int c; file->buf_ptr = p; if (p >= file->buf_end) { c = handle_eob(); if (c != '\\') return c; p = file->buf_ptr; } ch = *p; if (handle_stray_noerror()) { if (!(parse_flags & PARSE_FLAG_ACCEPT_STRAYS)) tcc_error("stray '\\' in program"); *--file->buf_ptr = '\\'; } p = file->buf_ptr; c = *p; return c; } /* handle just the EOB case, but not stray */ #define PEEKC_EOB(c, p)\ {\ p++;\ c = *p;\ if (c == '\\') {\ file->buf_ptr = p;\ c = handle_eob();\ p = file->buf_ptr;\ }\ } /* handle the complicated stray case */ #define PEEKC(c, p)\ {\ p++;\ c = *p;\ if (c == '\\') {\ c = handle_stray1(p);\ p = file->buf_ptr;\ }\ } /* input with '\[\r]\n' handling. Note that this function cannot handle other characters after '\', so you cannot call it inside strings or comments */ ST_FUNC void minp(void) { inp(); if (ch == '\\') handle_stray(); } /* single line C++ comments */ static uint8_t *parse_line_comment(uint8_t *p) { int c; p++; for(;;) { c = *p; redo: if (c == '\n' || c == CH_EOF) { break; } else if (c == '\\') { file->buf_ptr = p; c = handle_eob(); p = file->buf_ptr; if (c == '\\') { PEEKC_EOB(c, p); if (c == '\n') { file->line_num++; PEEKC_EOB(c, p); } else if (c == '\r') { PEEKC_EOB(c, p); if (c == '\n') { file->line_num++; PEEKC_EOB(c, p); } } } else { goto redo; } } else { p++; } } return p; } /* C comments */ ST_FUNC uint8_t *parse_comment(uint8_t *p) { int c; p++; for(;;) { /* fast skip loop */ for(;;) { c = *p; if (c == '\n' || c == '*' || c == '\\') break; p++; c = *p; if (c == '\n' || c == '*' || c == '\\') break; p++; } /* now we can handle all the cases */ if (c == '\n') { file->line_num++; p++; } else if (c == '*') { p++; for(;;) { c = *p; if (c == '*') { p++; } else if (c == '/') { goto end_of_comment; } else if (c == '\\') { file->buf_ptr = p; c = handle_eob(); p = file->buf_ptr; if (c == CH_EOF) tcc_error("unexpected end of file in comment"); if (c == '\\') { /* skip '\[\r]\n', otherwise just skip the stray */ while (c == '\\') { PEEKC_EOB(c, p); if (c == '\n') { file->line_num++; PEEKC_EOB(c, p); } else if (c == '\r') { PEEKC_EOB(c, p); if (c == '\n') { file->line_num++; PEEKC_EOB(c, p); } } else { goto after_star; } } } } else { break; } } after_star: ; } else { /* stray, eob or eof */ file->buf_ptr = p; c = handle_eob(); p = file->buf_ptr; if (c == CH_EOF) { tcc_error("unexpected end of file in comment"); } else if (c == '\\') { p++; } } } end_of_comment: p++; return p; } #define cinp minp static inline void skip_spaces(void) { while (isidnum_table[ch - CH_EOF] & IS_SPC) cinp(); } static inline int check_space(int t, int *spc) { if (t < 256 && (isidnum_table[t - CH_EOF] & IS_SPC)) { if (*spc) return 1; *spc = 1; } else *spc = 0; return 0; } /* parse a string without interpreting escapes */ static uint8_t *parse_pp_string(uint8_t *p, int sep, CString *str) { int c; p++; for(;;) { c = *p; if (c == sep) { break; } else if (c == '\\') { file->buf_ptr = p; c = handle_eob(); p = file->buf_ptr; if (c == CH_EOF) { unterminated_string: /* XXX: indicate line number of start of string */ tcc_error("missing terminating %c character", sep); } else if (c == '\\') { /* escape : just skip \[\r]\n */ PEEKC_EOB(c, p); if (c == '\n') { file->line_num++; p++; } else if (c == '\r') { PEEKC_EOB(c, p); if (c != '\n') expect("'\n' after '\r'"); file->line_num++; p++; } else if (c == CH_EOF) { goto unterminated_string; } else { if (str) { cstr_ccat(str, '\\'); cstr_ccat(str, c); } p++; } } } else if (c == '\n') { file->line_num++; goto add_char; } else if (c == '\r') { PEEKC_EOB(c, p); if (c != '\n') { if (str) cstr_ccat(str, '\r'); } else { file->line_num++; goto add_char; } } else { add_char: if (str) cstr_ccat(str, c); p++; } } p++; return p; } /* skip block of text until #else, #elif or #endif. skip also pairs of #if/#endif */ static void preprocess_skip(void) { int a, start_of_line, c, in_warn_or_error; uint8_t *p; p = file->buf_ptr; a = 0; redo_start: start_of_line = 1; in_warn_or_error = 0; for(;;) { redo_no_start: c = *p; switch(c) { case ' ': case '\t': case '\f': case '\v': case '\r': p++; goto redo_no_start; case '\n': file->line_num++; p++; goto redo_start; case '\\': file->buf_ptr = p; c = handle_eob(); if (c == CH_EOF) { expect("#endif"); } else if (c == '\\') { ch = file->buf_ptr[0]; handle_stray_noerror(); } p = file->buf_ptr; goto redo_no_start; /* skip strings */ case '\"': case '\'': if (in_warn_or_error) goto _default; p = parse_pp_string(p, c, NULL); break; /* skip comments */ case '/': if (in_warn_or_error) goto _default; file->buf_ptr = p; ch = *p; minp(); p = file->buf_ptr; if (ch == '*') { p = parse_comment(p); } else if (ch == '/') { p = parse_line_comment(p); } break; case '#': p++; if (start_of_line) { file->buf_ptr = p; next_nomacro(); p = file->buf_ptr; if (a == 0 && (tok == TOK_ELSE || tok == TOK_ELIF || tok == TOK_ENDIF)) goto the_end; if (tok == TOK_IF || tok == TOK_IFDEF || tok == TOK_IFNDEF) a++; else if (tok == TOK_ENDIF) a--; else if( tok == TOK_ERROR || tok == TOK_WARNING) in_warn_or_error = 1; else if (tok == TOK_LINEFEED) goto redo_start; else if (parse_flags & PARSE_FLAG_ASM_FILE) p = parse_line_comment(p); } else if (parse_flags & PARSE_FLAG_ASM_FILE) p = parse_line_comment(p); break; _default: default: p++; break; } start_of_line = 0; } the_end: ; file->buf_ptr = p; } /* ParseState handling */ /* XXX: currently, no include file info is stored. Thus, we cannot display accurate messages if the function or data definition spans multiple files */ /* save current parse state in 's' */ ST_FUNC void save_parse_state(ParseState *s) { s->line_num = file->line_num; s->macro_ptr = macro_ptr; s->tok = tok; s->tokc = tokc; } /* restore parse state from 's' */ ST_FUNC void restore_parse_state(ParseState *s) { file->line_num = s->line_num; macro_ptr = s->macro_ptr; tok = s->tok; tokc = s->tokc; } /* return the number of additional 'ints' necessary to store the token */ static inline int tok_size(const int *p) { switch(*p) { /* 4 bytes */ case TOK_CINT: case TOK_CUINT: case TOK_CCHAR: case TOK_LCHAR: case TOK_CFLOAT: case TOK_LINENUM: return 1 + 1; case TOK_STR: case TOK_LSTR: case TOK_PPNUM: case TOK_PPSTR: return 1 + ((sizeof(CString) + ((CString *)(p+1))->size + 3) >> 2); case TOK_CDOUBLE: case TOK_CLLONG: case TOK_CULLONG: return 1 + 2; case TOK_CLDOUBLE: return 1 + LDOUBLE_SIZE / 4; default: return 1 + 0; } } /* token string handling */ ST_INLN void tok_str_new(TokenString *s) { s->str = NULL; s->len = 0; s->allocated_len = 0; s->last_line_num = -1; } ST_FUNC TokenString *tok_str_alloc(void) { TokenString *str = tal_realloc(tokstr_alloc, 0, sizeof *str); tok_str_new(str); return str; } ST_FUNC int *tok_str_dup(TokenString *s) { int *str; str = tal_realloc(tokstr_alloc, 0, s->len * sizeof(int)); memcpy(str, s->str, s->len * sizeof(int)); return str; } ST_FUNC void tok_str_free(int *str) { tal_free(tokstr_alloc, str); } ST_FUNC int *tok_str_realloc(TokenString *s, int new_size) { int *str, size; size = s->allocated_len; if (size < 16) size = 16; while (size < new_size) size = size * 2; if (size > s->allocated_len) { str = tal_realloc(tokstr_alloc, s->str, size * sizeof(int)); s->allocated_len = size; s->str = str; } return s->str; } ST_FUNC void tok_str_add(TokenString *s, int t) { int len, *str; len = s->len; str = s->str; if (len >= s->allocated_len) str = tok_str_realloc(s, len + 1); str[len++] = t; s->len = len; } ST_FUNC void begin_macro(TokenString *str, int alloc) { str->alloc = alloc; str->prev = macro_stack; str->prev_ptr = macro_ptr; macro_ptr = str->str; macro_stack = str; } ST_FUNC void end_macro(void) { TokenString *str = macro_stack; macro_stack = str->prev; macro_ptr = str->prev_ptr; if (str->alloc == 2) { str->alloc = 3; /* just mark as finished */ } else { tok_str_free(str->str); if (str->alloc == 1) tal_free(tokstr_alloc, str); } } static void tok_str_add2(TokenString *s, int t, CValue *cv) { int len, *str; len = s->len; str = s->str; /* allocate space for worst case */ if (len + TOK_MAX_SIZE >= s->allocated_len) str = tok_str_realloc(s, len + TOK_MAX_SIZE + 1); str[len++] = t; switch(t) { case TOK_CINT: case TOK_CUINT: case TOK_CCHAR: case TOK_LCHAR: case TOK_CFLOAT: case TOK_LINENUM: str[len++] = cv->tab[0]; break; case TOK_PPNUM: case TOK_PPSTR: case TOK_STR: case TOK_LSTR: { /* Insert the string into the int array. */ size_t nb_words = 1 + (cv->str.size + sizeof(int) - 1) / sizeof(int); if (len + nb_words >= s->allocated_len) str = tok_str_realloc(s, len + nb_words + 1); str[len] = cv->str.size; memcpy(&str[len + 1], cv->str.data, cv->str.size); len += nb_words; } break; case TOK_CDOUBLE: case TOK_CLLONG: case TOK_CULLONG: #if LDOUBLE_SIZE == 8 case TOK_CLDOUBLE: #endif str[len++] = cv->tab[0]; str[len++] = cv->tab[1]; break; #if LDOUBLE_SIZE == 12 case TOK_CLDOUBLE: str[len++] = cv->tab[0]; str[len++] = cv->tab[1]; str[len++] = cv->tab[2]; #elif LDOUBLE_SIZE == 16 case TOK_CLDOUBLE: str[len++] = cv->tab[0]; str[len++] = cv->tab[1]; str[len++] = cv->tab[2]; str[len++] = cv->tab[3]; #elif LDOUBLE_SIZE != 8 #error add long double size support #endif break; default: break; } s->len = len; } /* add the current parse token in token string 's' */ ST_FUNC void tok_str_add_tok(TokenString *s) { CValue cval; /* save line number info */ if (file->line_num != s->last_line_num) { s->last_line_num = file->line_num; cval.i = s->last_line_num; tok_str_add2(s, TOK_LINENUM, &cval); } tok_str_add2(s, tok, &tokc); } /* get a token from an integer array and increment pointer accordingly. we code it as a macro to avoid pointer aliasing. */ static inline void TOK_GET(int *t, const int **pp, CValue *cv) { const int *p = *pp; int n, *tab; tab = cv->tab; switch(*t = *p++) { case TOK_CINT: case TOK_CUINT: case TOK_CCHAR: case TOK_LCHAR: case TOK_CFLOAT: case TOK_LINENUM: tab[0] = *p++; break; case TOK_STR: case TOK_LSTR: case TOK_PPNUM: case TOK_PPSTR: cv->str.size = *p++; cv->str.data = p; p += (cv->str.size + sizeof(int) - 1) / sizeof(int); break; case TOK_CDOUBLE: case TOK_CLLONG: case TOK_CULLONG: n = 2; goto copy; case TOK_CLDOUBLE: #if LDOUBLE_SIZE == 16 n = 4; #elif LDOUBLE_SIZE == 12 n = 3; #elif LDOUBLE_SIZE == 8 n = 2; #else # error add long double size support #endif copy: do *tab++ = *p++; while (--n); break; default: break; } *pp = p; } /* Calling this function is expensive, but it is not possible to read a token string backwards. */ static int tok_last(const int *str0, const int *str1) { const int *str = str0; int tok = 0; CValue cval; while (str < str1) TOK_GET(&tok, &str, &cval); return tok; } static int macro_is_equal(const int *a, const int *b) { CValue cv; int t; if (!a || !b) return 1; while (*a && *b) { /* first time preallocate static cstr_buf, next time only reset position to start */ cstr_reset(&cstr_buf); TOK_GET(&t, &a, &cv); cstr_cat(&cstr_buf, get_tok_str(t, &cv), 0); TOK_GET(&t, &b, &cv); if (strcmp(cstr_buf.data, get_tok_str(t, &cv))) return 0; } return !(*a || *b); } /* defines handling */ ST_INLN void define_push(int v, int macro_type, int *str, Sym *first_arg) { Sym *s, *o; o = define_find(v); s = sym_push2(&define_stack, v, macro_type, 0); s->d = str; s->next = first_arg; table_ident[v - TOK_IDENT]->sym_define = s; if (o && !macro_is_equal(o->d, s->d)) tcc_warning("%s redefined", get_tok_str(v, NULL)); } /* undefined a define symbol. Its name is just set to zero */ ST_FUNC void define_undef(Sym *s) { int v = s->v; if (v >= TOK_IDENT && v < tok_ident) table_ident[v - TOK_IDENT]->sym_define = NULL; } ST_INLN Sym *define_find(int v) { v -= TOK_IDENT; if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT)) return NULL; return table_ident[v]->sym_define; } /* free define stack until top reaches 'b' */ ST_FUNC void free_defines(Sym *b) { while (define_stack != b) { Sym *top = define_stack; define_stack = top->prev; tok_str_free(top->d); define_undef(top); sym_free(top); } /* restore remaining (-D or predefined) symbols */ while (b) { int v = b->v; if (v >= TOK_IDENT && v < tok_ident) { Sym **d = &table_ident[v - TOK_IDENT]->sym_define; if (!*d) *d = b; } b = b->prev; } } /* label lookup */ ST_FUNC Sym *label_find(int v) { v -= TOK_IDENT; if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT)) return NULL; return table_ident[v]->sym_label; } ST_FUNC Sym *label_push(Sym **ptop, int v, int flags) { Sym *s, **ps; s = sym_push2(ptop, v, 0, 0); s->r = flags; ps = &table_ident[v - TOK_IDENT]->sym_label; if (ptop == &global_label_stack) { /* modify the top most local identifier, so that sym_identifier will point to 's' when popped */ while (*ps != NULL) ps = &(*ps)->prev_tok; } s->prev_tok = *ps; *ps = s; return s; } /* pop labels until element last is reached. Look if any labels are undefined. Define symbols if '&&label' was used. */ ST_FUNC void label_pop(Sym **ptop, Sym *slast) { Sym *s, *s1; for(s = *ptop; s != slast; s = s1) { s1 = s->prev; if (s->r == LABEL_DECLARED) { tcc_warning("label '%s' declared but not used", get_tok_str(s->v, NULL)); } else if (s->r == LABEL_FORWARD) { tcc_error("label '%s' used but not defined", get_tok_str(s->v, NULL)); } else { if (s->c) { /* define corresponding symbol. A size of 1 is put. */ put_extern_sym(s, cur_text_section, s->jnext, 1); } } /* remove label */ table_ident[s->v - TOK_IDENT]->sym_label = s->prev_tok; sym_free(s); } *ptop = slast; } /* eval an expression for #if/#elif */ static int expr_preprocess(void) { int c, t; TokenString *str; str = tok_str_alloc(); while (tok != TOK_LINEFEED && tok != TOK_EOF) { next(); /* do macro subst */ if (tok == TOK_DEFINED) { next_nomacro(); t = tok; if (t == '(') next_nomacro(); c = define_find(tok) != 0; if (t == '(') next_nomacro(); tok = TOK_CINT; tokc.i = c; } else if (tok >= TOK_IDENT) { /* if undefined macro */ tok = TOK_CINT; tokc.i = 0; } tok_str_add_tok(str); } tok_str_add(str, -1); /* simulate end of file */ tok_str_add(str, 0); /* now evaluate C constant expression */ begin_macro(str, 1); next(); c = expr_const(); end_macro(); return c != 0; } /* parse after #define */ ST_FUNC void parse_define(void) { Sym *s, *first, **ps; int v, t, varg, is_vaargs, spc; int saved_parse_flags = parse_flags; v = tok; if (v < TOK_IDENT) tcc_error("invalid macro name '%s'", get_tok_str(tok, &tokc)); /* XXX: should check if same macro (ANSI) */ first = NULL; t = MACRO_OBJ; /* '(' must be just after macro definition for MACRO_FUNC */ parse_flags |= PARSE_FLAG_SPACES; next_nomacro_spc(); if (tok == '(') { /* must be able to parse TOK_DOTS (in asm mode '.' can be part of identifier) */ parse_flags &= ~PARSE_FLAG_ASM_FILE; isidnum_table['.' - CH_EOF] = 0; next_nomacro(); ps = &first; if (tok != ')') for (;;) { varg = tok; next_nomacro(); is_vaargs = 0; if (varg == TOK_DOTS) { varg = TOK___VA_ARGS__; is_vaargs = 1; } else if (tok == TOK_DOTS && gnu_ext) { is_vaargs = 1; next_nomacro(); } if (varg < TOK_IDENT) bad_list: tcc_error("bad macro parameter list"); s = sym_push2(&define_stack, varg | SYM_FIELD, is_vaargs, 0); *ps = s; ps = &s->next; if (tok == ')') break; if (tok != ',' || is_vaargs) goto bad_list; next_nomacro(); } next_nomacro_spc(); t = MACRO_FUNC; parse_flags |= (saved_parse_flags & PARSE_FLAG_ASM_FILE); isidnum_table['.' - CH_EOF] = (parse_flags & PARSE_FLAG_ASM_FILE) ? IS_ID : 0; } tokstr_buf.len = 0; spc = 2; parse_flags |= PARSE_FLAG_ACCEPT_STRAYS | PARSE_FLAG_SPACES | PARSE_FLAG_LINEFEED; while (tok != TOK_LINEFEED && tok != TOK_EOF) { /* remove spaces around ## and after '#' */ if (TOK_TWOSHARPS == tok) { if (2 == spc) goto bad_twosharp; if (1 == spc) --tokstr_buf.len; spc = 3; } else if ('#' == tok) { spc = 4; } else if (check_space(tok, &spc)) { goto skip; } tok_str_add2(&tokstr_buf, tok, &tokc); skip: next_nomacro_spc(); } parse_flags = saved_parse_flags; if (spc == 1) --tokstr_buf.len; /* remove trailing space */ tok_str_add(&tokstr_buf, 0); if (3 == spc) bad_twosharp: tcc_error("'##' cannot appear at either end of macro"); define_push(v, t, tok_str_dup(&tokstr_buf), first); } static CachedInclude *search_cached_include(TCCState *s1, const char *filename, int add) { const unsigned char *s; unsigned int h; CachedInclude *e; int i; h = TOK_HASH_INIT; s = (unsigned char *) filename; while (*s) { #ifdef _WIN32 h = TOK_HASH_FUNC(h, toup(*s)); #else h = TOK_HASH_FUNC(h, *s); #endif s++; } h &= (CACHED_INCLUDES_HASH_SIZE - 1); i = s1->cached_includes_hash[h]; for(;;) { if (i == 0) break; e = s1->cached_includes[i - 1]; if (0 == PATHCMP(e->filename, filename)) return e; i = e->hash_next; } if (!add) return NULL; e = tcc_malloc(sizeof(CachedInclude) + strlen(filename)); strcpy(e->filename, filename); e->ifndef_macro = e->once = 0; dynarray_add((void ***)&s1->cached_includes, &s1->nb_cached_includes, e); /* add in hash table */ e->hash_next = s1->cached_includes_hash[h]; s1->cached_includes_hash[h] = s1->nb_cached_includes; #ifdef INC_DEBUG printf("adding cached '%s'\n", filename); #endif return e; } static void pragma_parse(TCCState *s1) { next_nomacro(); if (tok == TOK_push_macro || tok == TOK_pop_macro) { int t = tok, v; Sym *s; if (next(), tok != '(') goto pragma_err; if (next(), tok != TOK_STR) goto pragma_err; v = tok_alloc(tokc.str.data, tokc.str.size - 1)->tok; if (next(), tok != ')') goto pragma_err; if (t == TOK_push_macro) { while (NULL == (s = define_find(v))) define_push(v, 0, NULL, NULL); s->type.ref = s; /* set push boundary */ } else { for (s = define_stack; s; s = s->prev) if (s->v == v && s->type.ref == s) { s->type.ref = NULL; break; } } if (s) table_ident[v - TOK_IDENT]->sym_define = s->d ? s : NULL; else tcc_warning("unbalanced #pragma pop_macro"); pp_debug_tok = t, pp_debug_symv = v; } else if (tok == TOK_once) { search_cached_include(s1, file->filename, 1)->once = pp_once; } else if (s1->ppfp) { /* tcc -E: keep pragmas below unchanged */ unget_tok(' '); unget_tok(TOK_PRAGMA); unget_tok('#'); unget_tok(TOK_LINEFEED); } else if (tok == TOK_pack) { /* This may be: #pragma pack(1) // set #pragma pack() // reset to default #pragma pack(push,1) // push & set #pragma pack(pop) // restore previous */ next(); skip('('); if (tok == TOK_ASM_pop) { next(); if (s1->pack_stack_ptr <= s1->pack_stack) { stk_error: tcc_error("out of pack stack"); } s1->pack_stack_ptr--; } else { int val = 0; if (tok != ')') { if (tok == TOK_ASM_push) { next(); if (s1->pack_stack_ptr >= s1->pack_stack + PACK_STACK_SIZE - 1) goto stk_error; s1->pack_stack_ptr++; skip(','); } if (tok != TOK_CINT) goto pragma_err; val = tokc.i; if (val < 1 || val > 16 || (val & (val - 1)) != 0) goto pragma_err; next(); } *s1->pack_stack_ptr = val; } if (tok != ')') goto pragma_err; } else if (tok == TOK_comment) { char *file; next(); skip('('); if (tok != TOK_lib) goto pragma_warn; next(); skip(','); if (tok != TOK_STR) goto pragma_err; file = tcc_strdup((char *)tokc.str.data); dynarray_add((void ***)&s1->pragma_libs, &s1->nb_pragma_libs, file); next(); if (tok != ')') goto pragma_err; } else { pragma_warn: if (s1->warn_unsupported) tcc_warning("#pragma %s is ignored", get_tok_str(tok, &tokc)); } return; pragma_err: tcc_error("malformed #pragma directive"); return; } /* is_bof is true if first non space token at beginning of file */ ST_FUNC void preprocess(int is_bof) { TCCState *s1 = tcc_state; int i, c, n, saved_parse_flags; char buf[1024], *q; Sym *s; saved_parse_flags = parse_flags; parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR | PARSE_FLAG_LINEFEED | (parse_flags & PARSE_FLAG_ASM_FILE) ; next_nomacro(); redo: switch(tok) { case TOK_DEFINE: pp_debug_tok = tok; next_nomacro(); pp_debug_symv = tok; parse_define(); break; case TOK_UNDEF: pp_debug_tok = tok; next_nomacro(); pp_debug_symv = tok; s = define_find(tok); /* undefine symbol by putting an invalid name */ if (s) define_undef(s); break; case TOK_INCLUDE: case TOK_INCLUDE_NEXT: ch = file->buf_ptr[0]; /* XXX: incorrect if comments : use next_nomacro with a special mode */ skip_spaces(); if (ch == '<') { c = '>'; goto read_name; } else if (ch == '\"') { c = ch; read_name: inp(); q = buf; while (ch != c && ch != '\n' && ch != CH_EOF) { if ((q - buf) < sizeof(buf) - 1) *q++ = ch; if (ch == '\\') { if (handle_stray_noerror() == 0) --q; } else inp(); } *q = '\0'; minp(); #if 0 /* eat all spaces and comments after include */ /* XXX: slightly incorrect */ while (ch1 != '\n' && ch1 != CH_EOF) inp(); #endif } else { /* computed #include : either we have only strings or we have anything enclosed in '<>' */ next(); buf[0] = '\0'; if (tok == TOK_STR) { while (tok != TOK_LINEFEED) { if (tok != TOK_STR) { include_syntax: tcc_error("'#include' expects \"FILENAME\" or "); } pstrcat(buf, sizeof(buf), (char *)tokc.str.data); next(); } c = '\"'; } else { int len; while (tok != TOK_LINEFEED) { pstrcat(buf, sizeof(buf), get_tok_str(tok, &tokc)); next(); } len = strlen(buf); /* check syntax and remove '<>' */ if (len < 2 || buf[0] != '<' || buf[len - 1] != '>') goto include_syntax; memmove(buf, buf + 1, len - 2); buf[len - 2] = '\0'; c = '>'; } } if (s1->include_stack_ptr >= s1->include_stack + INCLUDE_STACK_SIZE) tcc_error("#include recursion too deep"); /* store current file in stack, but increment stack later below */ *s1->include_stack_ptr = file; i = tok == TOK_INCLUDE_NEXT ? file->include_next_index : 0; n = 2 + s1->nb_include_paths + s1->nb_sysinclude_paths; for (; i < n; ++i) { char buf1[sizeof file->filename]; CachedInclude *e; const char *path; if (i == 0) { /* check absolute include path */ if (!IS_ABSPATH(buf)) continue; buf1[0] = 0; } else if (i == 1) { /* search in current dir if "header.h" */ if (c != '\"') continue; path = file->filename; pstrncpy(buf1, path, tcc_basename(path) - path); } else { /* search in all the include paths */ int j = i - 2, k = j - s1->nb_include_paths; path = k < 0 ? s1->include_paths[j] : s1->sysinclude_paths[k]; if (path == 0) continue; pstrcpy(buf1, sizeof(buf1), path); pstrcat(buf1, sizeof(buf1), "/"); } pstrcat(buf1, sizeof(buf1), buf); e = search_cached_include(s1, buf1, 0); if (e && (define_find(e->ifndef_macro) || e->once == pp_once)) { /* no need to parse the include because the 'ifndef macro' is defined (or had #pragma once) */ #ifdef INC_DEBUG printf("%s: skipping cached %s\n", file->filename, buf1); #endif goto include_done; } if (tcc_open(s1, buf1) < 0) continue; file->include_next_index = i + 1; #ifdef INC_DEBUG printf("%s: including %s\n", file->prev->filename, file->filename); #endif /* update target deps */ dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps, tcc_strdup(buf1)); /* push current file in stack */ ++s1->include_stack_ptr; /* add include file debug info */ if (s1->do_debug) put_stabs(file->filename, N_BINCL, 0, 0, 0); tok_flags |= TOK_FLAG_BOF | TOK_FLAG_BOL; ch = file->buf_ptr[0]; goto the_end; } tcc_error("include file '%s' not found", buf); include_done: break; case TOK_IFNDEF: c = 1; goto do_ifdef; case TOK_IF: c = expr_preprocess(); goto do_if; case TOK_IFDEF: c = 0; do_ifdef: next_nomacro(); if (tok < TOK_IDENT) tcc_error("invalid argument for '#if%sdef'", c ? "n" : ""); if (is_bof) { if (c) { #ifdef INC_DEBUG printf("#ifndef %s\n", get_tok_str(tok, NULL)); #endif file->ifndef_macro = tok; } } c = (define_find(tok) != 0) ^ c; do_if: if (s1->ifdef_stack_ptr >= s1->ifdef_stack + IFDEF_STACK_SIZE) tcc_error("memory full (ifdef)"); *s1->ifdef_stack_ptr++ = c; goto test_skip; case TOK_ELSE: if (s1->ifdef_stack_ptr == s1->ifdef_stack) tcc_error("#else without matching #if"); if (s1->ifdef_stack_ptr[-1] & 2) tcc_error("#else after #else"); c = (s1->ifdef_stack_ptr[-1] ^= 3); goto test_else; case TOK_ELIF: if (s1->ifdef_stack_ptr == s1->ifdef_stack) tcc_error("#elif without matching #if"); c = s1->ifdef_stack_ptr[-1]; if (c > 1) tcc_error("#elif after #else"); /* last #if/#elif expression was true: we skip */ if (c == 1) goto skip; c = expr_preprocess(); s1->ifdef_stack_ptr[-1] = c; test_else: if (s1->ifdef_stack_ptr == file->ifdef_stack_ptr + 1) file->ifndef_macro = 0; test_skip: if (!(c & 1)) { skip: preprocess_skip(); is_bof = 0; goto redo; } break; case TOK_ENDIF: if (s1->ifdef_stack_ptr <= file->ifdef_stack_ptr) tcc_error("#endif without matching #if"); s1->ifdef_stack_ptr--; /* '#ifndef macro' was at the start of file. Now we check if an '#endif' is exactly at the end of file */ if (file->ifndef_macro && s1->ifdef_stack_ptr == file->ifdef_stack_ptr) { file->ifndef_macro_saved = file->ifndef_macro; /* need to set to zero to avoid false matches if another #ifndef at middle of file */ file->ifndef_macro = 0; while (tok != TOK_LINEFEED) next_nomacro(); tok_flags |= TOK_FLAG_ENDIF; goto the_end; } break; case TOK_PPNUM: n = strtoul((char*)tokc.str.data, &q, 10); goto _line_num; case TOK_LINE: next(); if (tok != TOK_CINT) _line_err: tcc_error("wrong #line format"); n = tokc.i; _line_num: next(); if (tok != TOK_LINEFEED) { if (tok == TOK_STR) pstrcpy(file->filename, sizeof(file->filename), (char *)tokc.str.data); else if (parse_flags & PARSE_FLAG_ASM_FILE) break; else goto _line_err; --n; } if (file->fd > 0) total_lines += file->line_num - n; file->line_num = n; if (s1->do_debug) put_stabs(file->filename, N_BINCL, 0, 0, 0); break; case TOK_ERROR: case TOK_WARNING: c = tok; ch = file->buf_ptr[0]; skip_spaces(); q = buf; while (ch != '\n' && ch != CH_EOF) { if ((q - buf) < sizeof(buf) - 1) *q++ = ch; if (ch == '\\') { if (handle_stray_noerror() == 0) --q; } else inp(); } *q = '\0'; if (c == TOK_ERROR) tcc_error("#error %s", buf); else tcc_warning("#warning %s", buf); break; case TOK_PRAGMA: pragma_parse(s1); break; case TOK_LINEFEED: goto the_end; default: /* ignore gas line comment in an 'S' file. */ if (saved_parse_flags & PARSE_FLAG_ASM_FILE) goto ignore; if (tok == '!' && is_bof) /* '!' is ignored at beginning to allow C scripts. */ goto ignore; tcc_warning("Ignoring unknown preprocessing directive #%s", get_tok_str(tok, &tokc)); ignore: file->buf_ptr = parse_line_comment(file->buf_ptr); goto the_end; } /* ignore other preprocess commands or #! for C scripts */ while (tok != TOK_LINEFEED) next_nomacro(); the_end: parse_flags = saved_parse_flags; } /* evaluate escape codes in a string. */ static void parse_escape_string(CString *outstr, const uint8_t *buf, int is_long) { int c, n; const uint8_t *p; p = buf; for(;;) { c = *p; if (c == '\0') break; if (c == '\\') { p++; /* escape */ c = *p; switch(c) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': /* at most three octal digits */ n = c - '0'; p++; c = *p; if (isoct(c)) { n = n * 8 + c - '0'; p++; c = *p; if (isoct(c)) { n = n * 8 + c - '0'; p++; } } c = n; goto add_char_nonext; case 'x': case 'u': case 'U': p++; n = 0; for(;;) { c = *p; if (c >= 'a' && c <= 'f') c = c - 'a' + 10; else if (c >= 'A' && c <= 'F') c = c - 'A' + 10; else if (isnum(c)) c = c - '0'; else break; n = n * 16 + c; p++; } c = n; goto add_char_nonext; case 'a': c = '\a'; break; case 'b': c = '\b'; break; case 'f': c = '\f'; break; case 'n': c = '\n'; break; case 'r': c = '\r'; break; case 't': c = '\t'; break; case 'v': c = '\v'; break; case 'e': if (!gnu_ext) goto invalid_escape; c = 27; break; case '\'': case '\"': case '\\': case '?': break; default: invalid_escape: if (c >= '!' && c <= '~') tcc_warning("unknown escape sequence: \'\\%c\'", c); else tcc_warning("unknown escape sequence: \'\\x%x\'", c); break; } } p++; add_char_nonext: if (!is_long) cstr_ccat(outstr, c); else cstr_wccat(outstr, c); } /* add a trailing '\0' */ if (!is_long) cstr_ccat(outstr, '\0'); else cstr_wccat(outstr, '\0'); } static void parse_string(const char *s, int len) { uint8_t buf[1000], *p = buf; int is_long, sep; if ((is_long = *s == 'L')) ++s, --len; sep = *s++; len -= 2; if (len >= sizeof buf) p = tcc_malloc(len + 1); memcpy(p, s, len); p[len] = 0; cstr_reset(&tokcstr); parse_escape_string(&tokcstr, p, is_long); if (p != buf) tcc_free(p); if (sep == '\'') { int char_size; /* XXX: make it portable */ if (!is_long) char_size = 1; else char_size = sizeof(nwchar_t); if (tokcstr.size <= char_size) tcc_error("empty character constant"); if (tokcstr.size > 2 * char_size) tcc_warning("multi-character character constant"); if (!is_long) { tokc.i = *(int8_t *)tokcstr.data; tok = TOK_CCHAR; } else { tokc.i = *(nwchar_t *)tokcstr.data; tok = TOK_LCHAR; } } else { tokc.str.size = tokcstr.size; tokc.str.data = tokcstr.data; if (!is_long) tok = TOK_STR; else tok = TOK_LSTR; } } /* we use 64 bit numbers */ #define BN_SIZE 2 /* bn = (bn << shift) | or_val */ static void bn_lshift(unsigned int *bn, int shift, int or_val) { int i; unsigned int v; for(i=0;i> (32 - shift); } } static void bn_zero(unsigned int *bn) { int i; for(i=0;i= 'a' && ch <= 'f') t = ch - 'a' + 10; else if (ch >= 'A' && ch <= 'F') t = ch - 'A' + 10; else if (isnum(ch)) t = ch - '0'; else break; if (t >= b) break; if (q >= token_buf + STRING_MAX_SIZE) { num_too_long: tcc_error("number too long"); } *q++ = ch; ch = *p++; } if (ch == '.' || ((ch == 'e' || ch == 'E') && b == 10) || ((ch == 'p' || ch == 'P') && (b == 16 || b == 2))) { if (b != 10) { /* NOTE: strtox should support that for hexa numbers, but non ISOC99 libcs do not support it, so we prefer to do it by hand */ /* hexadecimal or binary floats */ /* XXX: handle overflows */ *q = '\0'; if (b == 16) shift = 4; else shift = 1; bn_zero(bn); q = token_buf; while (1) { t = *q++; if (t == '\0') { break; } else if (t >= 'a') { t = t - 'a' + 10; } else if (t >= 'A') { t = t - 'A' + 10; } else { t = t - '0'; } bn_lshift(bn, shift, t); } frac_bits = 0; if (ch == '.') { ch = *p++; while (1) { t = ch; if (t >= 'a' && t <= 'f') { t = t - 'a' + 10; } else if (t >= 'A' && t <= 'F') { t = t - 'A' + 10; } else if (t >= '0' && t <= '9') { t = t - '0'; } else { break; } if (t >= b) tcc_error("invalid digit"); bn_lshift(bn, shift, t); frac_bits += shift; ch = *p++; } } if (ch != 'p' && ch != 'P') expect("exponent"); ch = *p++; s = 1; exp_val = 0; if (ch == '+') { ch = *p++; } else if (ch == '-') { s = -1; ch = *p++; } if (ch < '0' || ch > '9') expect("exponent digits"); while (ch >= '0' && ch <= '9') { exp_val = exp_val * 10 + ch - '0'; ch = *p++; } exp_val = exp_val * s; /* now we can generate the number */ /* XXX: should patch directly float number */ d = (double)bn[1] * 4294967296.0 + (double)bn[0]; d = ldexp(d, exp_val - frac_bits); t = toup(ch); if (t == 'F') { ch = *p++; tok = TOK_CFLOAT; /* float : should handle overflow */ tokc.f = (float)d; } else if (t == 'L') { ch = *p++; #ifdef TCC_TARGET_PE tok = TOK_CDOUBLE; tokc.d = d; #else tok = TOK_CLDOUBLE; /* XXX: not large enough */ tokc.ld = (long double)d; #endif } else { tok = TOK_CDOUBLE; tokc.d = d; } } else { /* decimal floats */ if (ch == '.') { if (q >= token_buf + STRING_MAX_SIZE) goto num_too_long; *q++ = ch; ch = *p++; float_frac_parse: while (ch >= '0' && ch <= '9') { if (q >= token_buf + STRING_MAX_SIZE) goto num_too_long; *q++ = ch; ch = *p++; } } if (ch == 'e' || ch == 'E') { if (q >= token_buf + STRING_MAX_SIZE) goto num_too_long; *q++ = ch; ch = *p++; if (ch == '-' || ch == '+') { if (q >= token_buf + STRING_MAX_SIZE) goto num_too_long; *q++ = ch; ch = *p++; } if (ch < '0' || ch > '9') expect("exponent digits"); while (ch >= '0' && ch <= '9') { if (q >= token_buf + STRING_MAX_SIZE) goto num_too_long; *q++ = ch; ch = *p++; } } *q = '\0'; t = toup(ch); errno = 0; if (t == 'F') { ch = *p++; tok = TOK_CFLOAT; tokc.f = strtof(token_buf, NULL); } else if (t == 'L') { ch = *p++; #ifdef TCC_TARGET_PE tok = TOK_CDOUBLE; tokc.d = strtod(token_buf, NULL); #else tok = TOK_CLDOUBLE; tokc.ld = strtold(token_buf, NULL); #endif } else { tok = TOK_CDOUBLE; tokc.d = strtod(token_buf, NULL); } } } else { unsigned long long n, n1; int lcount, ucount, must_64bit; const char *p1; /* integer number */ *q = '\0'; q = token_buf; if (b == 10 && *q == '0') { b = 8; q++; } n = 0; while(1) { t = *q++; /* no need for checks except for base 10 / 8 errors */ if (t == '\0') break; else if (t >= 'a') t = t - 'a' + 10; else if (t >= 'A') t = t - 'A' + 10; else t = t - '0'; if (t >= b) tcc_error("invalid digit"); n1 = n; n = n * b + t; /* detect overflow */ /* XXX: this test is not reliable */ if (n < n1) tcc_error("integer constant overflow"); } /* Determine the characteristics (unsigned and/or 64bit) the type of the constant must have according to the constant suffix(es) */ lcount = ucount = must_64bit = 0; p1 = p; for(;;) { t = toup(ch); if (t == 'L') { if (lcount >= 2) tcc_error("three 'l's in integer constant"); if (lcount && *(p - 1) != ch) tcc_error("incorrect integer suffix: %s", p1); lcount++; #if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE if (lcount == 2) #endif must_64bit = 1; ch = *p++; } else if (t == 'U') { if (ucount >= 1) tcc_error("two 'u's in integer constant"); ucount++; ch = *p++; } else { break; } } /* Whether 64 bits are needed to hold the constant's value */ if (n & 0xffffffff00000000LL || must_64bit) { tok = TOK_CLLONG; n1 = n >> 32; } else { tok = TOK_CINT; n1 = n; } /* Whether type must be unsigned to hold the constant's value */ if (ucount || ((n1 >> 31) && (b != 10))) { if (tok == TOK_CLLONG) tok = TOK_CULLONG; else tok = TOK_CUINT; /* If decimal and no unsigned suffix, bump to 64 bits or throw error */ } else if (n1 >> 31) { if (tok == TOK_CINT) tok = TOK_CLLONG; else tcc_error("integer constant overflow"); } tokc.i = n; } if (ch) tcc_error("invalid number\n"); } #define PARSE2(c1, tok1, c2, tok2) \ case c1: \ PEEKC(c, p); \ if (c == c2) { \ p++; \ tok = tok2; \ } else { \ tok = tok1; \ } \ break; /* return next token without macro substitution */ static inline void next_nomacro1(void) { int t, c, is_long, len; TokenSym *ts; uint8_t *p, *p1; unsigned int h; p = file->buf_ptr; redo_no_start: c = *p; switch(c) { case ' ': case '\t': tok = c; p++; if (parse_flags & PARSE_FLAG_SPACES) goto keep_tok_flags; while (isidnum_table[*p - CH_EOF] & IS_SPC) ++p; goto redo_no_start; case '\f': case '\v': case '\r': p++; goto redo_no_start; case '\\': /* first look if it is in fact an end of buffer */ c = handle_stray1(p); p = file->buf_ptr; if (c == '\\') goto parse_simple; if (c != CH_EOF) goto redo_no_start; { TCCState *s1 = tcc_state; if ((parse_flags & PARSE_FLAG_LINEFEED) && !(tok_flags & TOK_FLAG_EOF)) { tok_flags |= TOK_FLAG_EOF; tok = TOK_LINEFEED; goto keep_tok_flags; } else if (!(parse_flags & PARSE_FLAG_PREPROCESS)) { tok = TOK_EOF; } else if (s1->ifdef_stack_ptr != file->ifdef_stack_ptr) { tcc_error("missing #endif"); } else if (s1->include_stack_ptr == s1->include_stack) { /* no include left : end of file. */ tok = TOK_EOF; } else { tok_flags &= ~TOK_FLAG_EOF; /* pop include file */ /* test if previous '#endif' was after a #ifdef at start of file */ if (tok_flags & TOK_FLAG_ENDIF) { #ifdef INC_DEBUG printf("#endif %s\n", get_tok_str(file->ifndef_macro_saved, NULL)); #endif search_cached_include(s1, file->filename, 1) ->ifndef_macro = file->ifndef_macro_saved; tok_flags &= ~TOK_FLAG_ENDIF; } /* add end of include file debug info */ if (tcc_state->do_debug) { put_stabd(N_EINCL, 0, 0); } /* pop include stack */ tcc_close(); s1->include_stack_ptr--; p = file->buf_ptr; goto redo_no_start; } } break; case '\n': file->line_num++; tok_flags |= TOK_FLAG_BOL; p++; maybe_newline: if (0 == (parse_flags & PARSE_FLAG_LINEFEED)) goto redo_no_start; tok = TOK_LINEFEED; goto keep_tok_flags; case '#': /* XXX: simplify */ PEEKC(c, p); if ((tok_flags & TOK_FLAG_BOL) && (parse_flags & PARSE_FLAG_PREPROCESS)) { file->buf_ptr = p; preprocess(tok_flags & TOK_FLAG_BOF); p = file->buf_ptr; goto maybe_newline; } else { if (c == '#') { p++; tok = TOK_TWOSHARPS; } else { if (parse_flags & PARSE_FLAG_ASM_FILE) { p = parse_line_comment(p - 1); goto redo_no_start; } else { tok = '#'; } } } break; /* dollar is allowed to start identifiers when not parsing asm */ case '$': if (!(isidnum_table[c - CH_EOF] & IS_ID) || (parse_flags & PARSE_FLAG_ASM_FILE)) goto parse_simple; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': case 's': case 't': case 'u': case 'v': case 'w': case 'x': case 'y': case 'z': case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G': case 'H': case 'I': case 'J': case 'K': case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z': case '_': parse_ident_fast: p1 = p; h = TOK_HASH_INIT; h = TOK_HASH_FUNC(h, c); while (c = *++p, isidnum_table[c - CH_EOF] & (IS_ID|IS_NUM)) h = TOK_HASH_FUNC(h, c); len = p - p1; if (c != '\\') { TokenSym **pts; /* fast case : no stray found, so we have the full token and we have already hashed it */ h &= (TOK_HASH_SIZE - 1); pts = &hash_ident[h]; for(;;) { ts = *pts; if (!ts) break; if (ts->len == len && !memcmp(ts->str, p1, len)) goto token_found; pts = &(ts->hash_next); } ts = tok_alloc_new(pts, (char *) p1, len); token_found: ; } else { /* slower case */ cstr_reset(&tokcstr); cstr_cat(&tokcstr, p1, len); p--; PEEKC(c, p); parse_ident_slow: while (isidnum_table[c - CH_EOF] & (IS_ID|IS_NUM)) { cstr_ccat(&tokcstr, c); PEEKC(c, p); } ts = tok_alloc(tokcstr.data, tokcstr.size); } tok = ts->tok; break; case 'L': t = p[1]; if (t != '\\' && t != '\'' && t != '\"') { /* fast case */ goto parse_ident_fast; } else { PEEKC(c, p); if (c == '\'' || c == '\"') { is_long = 1; goto str_const; } else { cstr_reset(&tokcstr); cstr_ccat(&tokcstr, 'L'); goto parse_ident_slow; } } break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': cstr_reset(&tokcstr); /* after the first digit, accept digits, alpha, '.' or sign if prefixed by 'eEpP' */ parse_num: for(;;) { t = c; cstr_ccat(&tokcstr, c); PEEKC(c, p); if (!((isidnum_table[c - CH_EOF] & (IS_ID|IS_NUM)) || c == '.' || ((c == '+' || c == '-') && (t == 'e' || t == 'E' || t == 'p' || t == 'P') && !(parse_flags & PARSE_FLAG_ASM_FILE) ))) break; } /* We add a trailing '\0' to ease parsing */ cstr_ccat(&tokcstr, '\0'); tokc.str.size = tokcstr.size; tokc.str.data = tokcstr.data; tok = TOK_PPNUM; break; case '.': /* special dot handling because it can also start a number */ PEEKC(c, p); if (isnum(c)) { cstr_reset(&tokcstr); cstr_ccat(&tokcstr, '.'); goto parse_num; } else if ((parse_flags & PARSE_FLAG_ASM_FILE) && (isidnum_table[c - CH_EOF] & (IS_ID|IS_NUM))) { *--p = c = '.'; goto parse_ident_fast; } else if (c == '.') { PEEKC(c, p); if (c == '.') { p++; tok = TOK_DOTS; } else { *--p = '.'; /* may underflow into file->unget[] */ tok = '.'; } } else { tok = '.'; } break; case '\'': case '\"': is_long = 0; str_const: cstr_reset(&tokcstr); if (is_long) cstr_ccat(&tokcstr, 'L'); cstr_ccat(&tokcstr, c); p = parse_pp_string(p, c, &tokcstr); cstr_ccat(&tokcstr, c); cstr_ccat(&tokcstr, '\0'); tokc.str.size = tokcstr.size; tokc.str.data = tokcstr.data; tok = TOK_PPSTR; break; case '<': PEEKC(c, p); if (c == '=') { p++; tok = TOK_LE; } else if (c == '<') { PEEKC(c, p); if (c == '=') { p++; tok = TOK_A_SHL; } else { tok = TOK_SHL; } } else { tok = TOK_LT; } break; case '>': PEEKC(c, p); if (c == '=') { p++; tok = TOK_GE; } else if (c == '>') { PEEKC(c, p); if (c == '=') { p++; tok = TOK_A_SAR; } else { tok = TOK_SAR; } } else { tok = TOK_GT; } break; case '&': PEEKC(c, p); if (c == '&') { p++; tok = TOK_LAND; } else if (c == '=') { p++; tok = TOK_A_AND; } else { tok = '&'; } break; case '|': PEEKC(c, p); if (c == '|') { p++; tok = TOK_LOR; } else if (c == '=') { p++; tok = TOK_A_OR; } else { tok = '|'; } break; case '+': PEEKC(c, p); if (c == '+') { p++; tok = TOK_INC; } else if (c == '=') { p++; tok = TOK_A_ADD; } else { tok = '+'; } break; case '-': PEEKC(c, p); if (c == '-') { p++; tok = TOK_DEC; } else if (c == '=') { p++; tok = TOK_A_SUB; } else if (c == '>') { p++; tok = TOK_ARROW; } else { tok = '-'; } break; PARSE2('!', '!', '=', TOK_NE) PARSE2('=', '=', '=', TOK_EQ) PARSE2('*', '*', '=', TOK_A_MUL) PARSE2('%', '%', '=', TOK_A_MOD) PARSE2('^', '^', '=', TOK_A_XOR) /* comments or operator */ case '/': PEEKC(c, p); if (c == '*') { p = parse_comment(p); /* comments replaced by a blank */ tok = ' '; goto keep_tok_flags; } else if (c == '/') { p = parse_line_comment(p); tok = ' '; goto keep_tok_flags; } else if (c == '=') { p++; tok = TOK_A_DIV; } else { tok = '/'; } break; /* simple tokens */ case '(': case ')': case '[': case ']': case '{': case '}': case ',': case ';': case ':': case '?': case '~': case '@': /* only used in assembler */ parse_simple: tok = c; p++; break; default: if (c >= 0x80 && c <= 0xFF) /* utf8 identifiers */ goto parse_ident_fast; if (parse_flags & PARSE_FLAG_ASM_FILE) goto parse_simple; tcc_error("unrecognized character \\x%02x", c); break; } tok_flags = 0; keep_tok_flags: file->buf_ptr = p; #if defined(PARSE_DEBUG) printf("token = %s\n", get_tok_str(tok, &tokc)); #endif } /* return next token without macro substitution. Can read input from macro_ptr buffer */ static void next_nomacro_spc(void) { if (macro_ptr) { redo: tok = *macro_ptr; if (tok) { TOK_GET(&tok, ¯o_ptr, &tokc); if (tok == TOK_LINENUM) { file->line_num = tokc.i; goto redo; } } } else { next_nomacro1(); } } ST_FUNC void next_nomacro(void) { do { next_nomacro_spc(); } while (tok < 256 && (isidnum_table[tok - CH_EOF] & IS_SPC)); } static void macro_subst( TokenString *tok_str, Sym **nested_list, const int *macro_str, int can_read_stream ); /* substitute arguments in replacement lists in macro_str by the values in args (field d) and return allocated string */ static int *macro_arg_subst(Sym **nested_list, const int *macro_str, Sym *args) { int t, t0, t1, spc; const int *st; Sym *s; CValue cval; TokenString str; CString cstr; tok_str_new(&str); t0 = t1 = 0; while(1) { TOK_GET(&t, ¯o_str, &cval); if (!t) break; if (t == '#') { /* stringize */ TOK_GET(&t, ¯o_str, &cval); if (!t) goto bad_stringy; s = sym_find2(args, t); if (s) { cstr_new(&cstr); cstr_ccat(&cstr, '\"'); st = s->d; spc = 0; while (*st) { TOK_GET(&t, &st, &cval); if (t != TOK_PLCHLDR && t != TOK_NOSUBST && 0 == check_space(t, &spc)) { const char *s = get_tok_str(t, &cval); while (*s) { if (t == TOK_PPSTR && *s != '\'') add_char(&cstr, *s); else cstr_ccat(&cstr, *s); ++s; } } } cstr.size -= spc; cstr_ccat(&cstr, '\"'); cstr_ccat(&cstr, '\0'); #ifdef PP_DEBUG printf("\nstringize: <%s>\n", (char *)cstr.data); #endif /* add string */ cval.str.size = cstr.size; cval.str.data = cstr.data; tok_str_add2(&str, TOK_PPSTR, &cval); cstr_free(&cstr); } else { bad_stringy: expect("macro parameter after '#'"); } } else if (t >= TOK_IDENT) { s = sym_find2(args, t); if (s) { int l0 = str.len; st = s->d; /* if '##' is present before or after, no arg substitution */ if (*macro_str == TOK_TWOSHARPS || t1 == TOK_TWOSHARPS) { /* special case for var arg macros : ## eats the ',' if empty VA_ARGS variable. */ if (t1 == TOK_TWOSHARPS && t0 == ',' && gnu_ext && s->type.t) { if (*st == 0) { /* suppress ',' '##' */ str.len -= 2; } else { /* suppress '##' and add variable */ str.len--; goto add_var; } } else { for(;;) { int t1; TOK_GET(&t1, &st, &cval); if (!t1) break; tok_str_add2(&str, t1, &cval); } } } else { add_var: /* NOTE: the stream cannot be read when macro substituing an argument */ macro_subst(&str, nested_list, st, 0); } if (str.len == l0) /* exanded to empty string */ tok_str_add(&str, TOK_PLCHLDR); } else { tok_str_add(&str, t); } } else { tok_str_add2(&str, t, &cval); } t0 = t1, t1 = t; } tok_str_add(&str, 0); return str.str; } static char const ab_month_name[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; /* peek or read [ws_str == NULL] next token from function macro call, walking up macro levels up to the file if necessary */ static int next_argstream(Sym **nested_list, int can_read_stream, TokenString *ws_str) { int t; const int *p; Sym *sa; for (;;) { if (macro_ptr) { p = macro_ptr, t = *p; if (ws_str) { while (is_space(t) || TOK_LINEFEED == t) tok_str_add(ws_str, t), t = *++p; } if (t == 0 && can_read_stream) { end_macro(); /* also, end of scope for nested defined symbol */ sa = *nested_list; while (sa && sa->v == 0) sa = sa->prev; if (sa) sa->v = 0; continue; } } else { ch = handle_eob(); if (ws_str) { while (is_space(ch) || ch == '\n' || ch == '/') { if (ch == '/') { int c; uint8_t *p = file->buf_ptr; PEEKC(c, p); if (c == '*') { p = parse_comment(p); file->buf_ptr = p - 1; } else if (c == '/') { p = parse_line_comment(p); file->buf_ptr = p - 1; } else break; ch = ' '; } tok_str_add(ws_str, ch); cinp(); } } t = ch; } if (ws_str) return t; next_nomacro_spc(); return tok; } } /* do macro substitution of current token with macro 's' and add result to (tok_str,tok_len). 'nested_list' is the list of all macros we got inside to avoid recursing. Return non zero if no substitution needs to be done */ static int macro_subst_tok( TokenString *tok_str, Sym **nested_list, Sym *s, int can_read_stream) { Sym *args, *sa, *sa1; int parlevel, *mstr, t, t1, spc; TokenString str; char *cstrval; CValue cval; CString cstr; char buf[32]; /* if symbol is a macro, prepare substitution */ /* special macros */ if (tok == TOK___LINE__) { snprintf(buf, sizeof(buf), "%d", file->line_num); cstrval = buf; t1 = TOK_PPNUM; goto add_cstr1; } else if (tok == TOK___FILE__) { cstrval = file->filename; goto add_cstr; } else if (tok == TOK___DATE__ || tok == TOK___TIME__) { time_t ti; struct tm *tm; time(&ti); tm = localtime(&ti); if (tok == TOK___DATE__) { snprintf(buf, sizeof(buf), "%s %2d %d", ab_month_name[tm->tm_mon], tm->tm_mday, tm->tm_year + 1900); } else { snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec); } cstrval = buf; add_cstr: t1 = TOK_STR; add_cstr1: cstr_new(&cstr); cstr_cat(&cstr, cstrval, 0); cval.str.size = cstr.size; cval.str.data = cstr.data; tok_str_add2(tok_str, t1, &cval); cstr_free(&cstr); } else { int saved_parse_flags = parse_flags; mstr = s->d; if (s->type.t == MACRO_FUNC) { /* whitespace between macro name and argument list */ TokenString ws_str; tok_str_new(&ws_str); spc = 0; parse_flags |= PARSE_FLAG_SPACES | PARSE_FLAG_LINEFEED | PARSE_FLAG_ACCEPT_STRAYS; /* get next token from argument stream */ t = next_argstream(nested_list, can_read_stream, &ws_str); if (t != '(') { /* not a macro substitution after all, restore the * macro token plus all whitespace we've read. * whitespace is intentionally not merged to preserve * newlines. */ parse_flags = saved_parse_flags; tok_str_add(tok_str, tok); if (parse_flags & PARSE_FLAG_SPACES) { int i; for (i = 0; i < ws_str.len; i++) tok_str_add(tok_str, ws_str.str[i]); } tok_str_free(ws_str.str); return 0; } else { tok_str_free(ws_str.str); } next_nomacro(); /* eat '(' */ /* argument macro */ args = NULL; sa = s->next; /* NOTE: empty args are allowed, except if no args */ for(;;) { do { next_argstream(nested_list, can_read_stream, NULL); } while (is_space(tok) || TOK_LINEFEED == tok); empty_arg: /* handle '()' case */ if (!args && !sa && tok == ')') break; if (!sa) tcc_error("macro '%s' used with too many args", get_tok_str(s->v, 0)); tok_str_new(&str); parlevel = spc = 0; /* NOTE: non zero sa->t indicates VA_ARGS */ while ((parlevel > 0 || (tok != ')' && (tok != ',' || sa->type.t)))) { if (tok == TOK_EOF || tok == 0) break; if (tok == '(') parlevel++; else if (tok == ')') parlevel--; if (tok == TOK_LINEFEED) tok = ' '; if (!check_space(tok, &spc)) tok_str_add2(&str, tok, &tokc); next_argstream(nested_list, can_read_stream, NULL); } if (parlevel) expect(")"); str.len -= spc; tok_str_add(&str, 0); sa1 = sym_push2(&args, sa->v & ~SYM_FIELD, sa->type.t, 0); sa1->d = str.str; sa = sa->next; if (tok == ')') { /* special case for gcc var args: add an empty var arg argument if it is omitted */ if (sa && sa->type.t && gnu_ext) goto empty_arg; break; } if (tok != ',') expect(","); } if (sa) { tcc_error("macro '%s' used with too few args", get_tok_str(s->v, 0)); } parse_flags = saved_parse_flags; /* now subst each arg */ mstr = macro_arg_subst(nested_list, mstr, args); /* free memory */ sa = args; while (sa) { sa1 = sa->prev; tok_str_free(sa->d); sym_free(sa); sa = sa1; } } sym_push2(nested_list, s->v, 0, 0); parse_flags = saved_parse_flags; macro_subst(tok_str, nested_list, mstr, can_read_stream | 2); /* pop nested defined symbol */ sa1 = *nested_list; *nested_list = sa1->prev; sym_free(sa1); if (mstr != s->d) tok_str_free(mstr); } return 0; } static int paste_tokens(int t1, CValue *v1, int t2, CValue *v2) { CString cstr; int n; cstr_new(&cstr); if (t1 != TOK_PLCHLDR) cstr_cat(&cstr, get_tok_str(t1, v1), -1); n = cstr.size; if (t2 != TOK_PLCHLDR) cstr_cat(&cstr, get_tok_str(t2, v2), -1); cstr_ccat(&cstr, '\0'); tcc_open_bf(tcc_state, ":paste:", cstr.size); memcpy(file->buffer, cstr.data, cstr.size); for (;;) { next_nomacro1(); if (0 == *file->buf_ptr) break; if (is_space(tok)) continue; tcc_warning("pasting <%.*s> and <%s> does not give a valid preprocessing token", n, cstr.data, (char*)cstr.data + n); break; } tcc_close(); //printf("paste <%s>\n", (char*)cstr.data); cstr_free(&cstr); return 0; } /* handle the '##' operator. Return NULL if no '##' seen. Otherwise return the resulting string (which must be freed). */ static inline int *macro_twosharps(const int *ptr0) { int t; CValue cval; TokenString macro_str1; int start_of_nosubsts = -1; const int *ptr; /* we search the first '##' */ for (ptr = ptr0;;) { TOK_GET(&t, &ptr, &cval); if (t == TOK_TWOSHARPS) break; if (t == 0) return NULL; } tok_str_new(¯o_str1); //tok_print(" $$$", ptr0); for (ptr = ptr0;;) { TOK_GET(&t, &ptr, &cval); if (t == 0) break; if (t == TOK_TWOSHARPS) continue; while (*ptr == TOK_TWOSHARPS) { int t1; CValue cv1; /* given 'a##b', remove nosubsts preceding 'a' */ if (start_of_nosubsts >= 0) macro_str1.len = start_of_nosubsts; /* given 'a##b', remove nosubsts preceding 'b' */ while ((t1 = *++ptr) == TOK_NOSUBST) ; if (t1 && t1 != TOK_TWOSHARPS && t1 != ':') /* 'a##:' don't build a new token */ { TOK_GET(&t1, &ptr, &cv1); if (t != TOK_PLCHLDR || t1 != TOK_PLCHLDR) { paste_tokens(t, &cval, t1, &cv1); t = tok, cval = tokc; } } } if (t == TOK_NOSUBST) { if (start_of_nosubsts < 0) start_of_nosubsts = macro_str1.len; } else { start_of_nosubsts = -1; } tok_str_add2(¯o_str1, t, &cval); } tok_str_add(¯o_str1, 0); //tok_print(" ###", macro_str1.str); return macro_str1.str; } /* do macro substitution of macro_str and add result to (tok_str,tok_len). 'nested_list' is the list of all macros we got inside to avoid recursing. */ static void macro_subst( TokenString *tok_str, Sym **nested_list, const int *macro_str, int can_read_stream ) { Sym *s; const int *ptr; int t, spc, nosubst; CValue cval; int *macro_str1 = NULL; /* first scan for '##' operator handling */ ptr = macro_str; spc = nosubst = 0; /* first scan for '##' operator handling */ if (can_read_stream & 1) { macro_str1 = macro_twosharps(ptr); if (macro_str1) ptr = macro_str1; } while (1) { TOK_GET(&t, &ptr, &cval); if (t == 0) break; if (t >= TOK_IDENT && 0 == nosubst) { s = define_find(t); if (s == NULL) goto no_subst; /* if nested substitution, do nothing */ if (sym_find2(*nested_list, t)) { /* and mark it as TOK_NOSUBST, so it doesn't get subst'd again */ tok_str_add2(tok_str, TOK_NOSUBST, NULL); goto no_subst; } { TokenString str; str.str = (int*)ptr; begin_macro(&str, 2); tok = t; macro_subst_tok(tok_str, nested_list, s, can_read_stream); if (str.alloc == 3) { /* already finished by reading function macro arguments */ break; } ptr = macro_ptr; end_macro (); } spc = (tok_str->len && is_space(tok_last(tok_str->str, tok_str->str + tok_str->len))); } else { if (t == '\\' && !(parse_flags & PARSE_FLAG_ACCEPT_STRAYS)) tcc_error("stray '\\' in program"); no_subst: if (!check_space(t, &spc)) tok_str_add2(tok_str, t, &cval); nosubst = 0; if (t == TOK_NOSUBST) nosubst = 1; } } if (macro_str1) tok_str_free(macro_str1); } /* return next token with macro substitution */ ST_FUNC void next(void) { redo: if (parse_flags & PARSE_FLAG_SPACES) next_nomacro_spc(); else next_nomacro(); if (macro_ptr) { if (tok == TOK_NOSUBST || tok == TOK_PLCHLDR) { /* discard preprocessor markers */ goto redo; } else if (tok == 0) { /* end of macro or unget token string */ end_macro(); goto redo; } } else if (tok >= TOK_IDENT && (parse_flags & PARSE_FLAG_PREPROCESS)) { Sym *s; /* if reading from file, try to substitute macros */ s = define_find(tok); if (s) { Sym *nested_list = NULL; tokstr_buf.len = 0; macro_subst_tok(&tokstr_buf, &nested_list, s, 1); tok_str_add(&tokstr_buf, 0); begin_macro(&tokstr_buf, 2); goto redo; } } /* convert preprocessor tokens into C tokens */ if (tok == TOK_PPNUM) { if (parse_flags & PARSE_FLAG_TOK_NUM) parse_number((char *)tokc.str.data); } else if (tok == TOK_PPSTR) { if (parse_flags & PARSE_FLAG_TOK_STR) parse_string((char *)tokc.str.data, tokc.str.size - 1); } } /* push back current token and set current token to 'last_tok'. Only identifier case handled for labels. */ ST_INLN void unget_tok(int last_tok) { TokenString *str = tok_str_alloc(); tok_str_add2(str, tok, &tokc); tok_str_add(str, 0); begin_macro(str, 1); tok = last_tok; } ST_FUNC void preprocess_init(TCCState *s1) { s1->include_stack_ptr = s1->include_stack; /* XXX: move that before to avoid having to initialize file->ifdef_stack_ptr ? */ s1->ifdef_stack_ptr = s1->ifdef_stack; file->ifdef_stack_ptr = s1->ifdef_stack_ptr; pp_once++; pvtop = vtop = vstack - 1; s1->pack_stack[0] = 0; s1->pack_stack_ptr = s1->pack_stack; isidnum_table['$' - CH_EOF] = s1->dollars_in_identifiers ? IS_ID : 0; isidnum_table['.' - CH_EOF] = (parse_flags & PARSE_FLAG_ASM_FILE) ? IS_ID : 0; } ST_FUNC void preprocess_new(void) { int i, c; const char *p, *r; /* init isid table */ for(i = CH_EOF; i<128; i++) isidnum_table[i - CH_EOF] = is_space(i) ? IS_SPC : isid(i) ? IS_ID : isnum(i) ? IS_NUM : 0; for(i = 128; i<256; i++) isidnum_table[i - CH_EOF] = IS_ID; /* init allocators */ tal_new(&toksym_alloc, TOKSYM_TAL_LIMIT, TOKSYM_TAL_SIZE); tal_new(&tokstr_alloc, TOKSTR_TAL_LIMIT, TOKSTR_TAL_SIZE); tal_new(&cstr_alloc, CSTR_TAL_LIMIT, CSTR_TAL_SIZE); memset(hash_ident, 0, TOK_HASH_SIZE * sizeof(TokenSym *)); cstr_new(&cstr_buf); cstr_realloc(&cstr_buf, STRING_MAX_SIZE); tok_str_new(&tokstr_buf); tok_str_realloc(&tokstr_buf, TOKSTR_MAX_SIZE); tok_ident = TOK_IDENT; p = tcc_keywords; while (*p) { r = p; for(;;) { c = *r++; if (c == '\0') break; } tok_alloc(p, r - p - 1); p = r; } } ST_FUNC void preprocess_delete(void) { int i, n; /* free -D and compiler defines */ free_defines(NULL); /* cleanup from error/setjmp */ while (macro_stack) end_macro(); macro_ptr = NULL; /* free tokens */ n = tok_ident - TOK_IDENT; for(i = 0; i < n; i++) tal_free(toksym_alloc, table_ident[i]); tcc_free(table_ident); table_ident = NULL; /* free static buffers */ cstr_free(&tokcstr); cstr_free(&cstr_buf); tok_str_free(tokstr_buf.str); /* free allocators */ tal_delete(toksym_alloc); toksym_alloc = NULL; tal_delete(tokstr_alloc); tokstr_alloc = NULL; tal_delete(cstr_alloc); cstr_alloc = NULL; } /* ------------------------------------------------------------------------- */ /* tcc -E [-P[1]] [-dD} support */ static void tok_print(const char *msg, const int *str) { FILE *fp; int t; CValue cval; fp = tcc_state->ppfp; if (!fp || !tcc_state->dflag) fp = stdout; fprintf(fp, "%s ", msg); while (str) { TOK_GET(&t, &str, &cval); if (!t) break; fprintf(fp,"%s", get_tok_str(t, &cval)); } fprintf(fp, "\n"); } static void pp_line(TCCState *s1, BufferedFile *f, int level) { int d = f->line_num - f->line_ref; if (s1->dflag & 4) return; if (s1->Pflag == LINE_MACRO_OUTPUT_FORMAT_NONE) { if (level == 0 && f->line_ref && d) { d = 1; goto simple; } } else if (level == 0 && f->line_ref && d < 8) { simple: while (d > 0) fputs("\n", s1->ppfp), --d; } else if (s1->Pflag == LINE_MACRO_OUTPUT_FORMAT_STD) { fprintf(s1->ppfp, "#line %d \"%s\"\n", f->line_num, f->filename); } else { fprintf(s1->ppfp, "# %d \"%s\"%s\n", f->line_num, f->filename, level > 0 ? " 1" : level < 0 ? " 2" : ""); } f->line_ref = f->line_num; } static void define_print(TCCState *s1, int v) { FILE *fp; Sym *s; s = define_find(v); if (NULL == s || NULL == s->d) return; fp = s1->ppfp; fprintf(fp, "#define %s", get_tok_str(v, NULL)); if (s->type.t == MACRO_FUNC) { Sym *a = s->next; fprintf(fp,"("); if (a) for (;;) { fprintf(fp,"%s", get_tok_str(a->v & ~SYM_FIELD, NULL)); if (!(a = a->next)) break; fprintf(fp,","); } fprintf(fp,")"); } tok_print("", s->d); } static void pp_debug_defines(TCCState *s1) { int v, t; const char *vs; FILE *fp; t = pp_debug_tok; if (t == 0) return; file->line_num--; pp_line(s1, file, 0); file->line_ref = ++file->line_num; fp = s1->ppfp; v = pp_debug_symv; vs = get_tok_str(v, NULL); if (t == TOK_DEFINE) { define_print(s1, v); } else if (t == TOK_UNDEF) { fprintf(fp, "#undef %s\n", vs); } else if (t == TOK_push_macro) { fprintf(fp, "#pragma push_macro(\"%s\")\n", vs); } else if (t == TOK_pop_macro) { fprintf(fp, "#pragma pop_macro(\"%s\")\n", vs); } pp_debug_tok = 0; } static void pp_debug_builtins(TCCState *s1) { int v; for (v = TOK_IDENT; v < tok_ident; ++v) define_print(s1, v); } static int need_space(int prev_tok, int tok, const char *tokstr) { const char *sp_chars = ""; if ((prev_tok >= TOK_IDENT || prev_tok == TOK_PPNUM) && (tok >= TOK_IDENT || tok == TOK_PPNUM)) return 1; switch (prev_tok) { case '+': sp_chars = "+="; break; case '-': sp_chars = "-=>"; break; case '*': case '/': case '%': case '^': case '=': case '!': case TOK_A_SHL: case TOK_A_SAR: sp_chars = "="; break; case '&': sp_chars = "&="; break; case '|': sp_chars = "|="; break; case '<': sp_chars = "<="; break; case '>': sp_chars = ">="; break; case '.': sp_chars = "."; break; case '#': sp_chars = "#"; break; case TOK_PPNUM: sp_chars = "+-"; break; } return !!strchr(sp_chars, tokstr[0]); } /* Preprocess the current file */ ST_FUNC int tcc_preprocess(TCCState *s1) { BufferedFile **iptr; int token_seen, spcs, level; Sym *define_start; const char *tokstr; preprocess_init(s1); ch = file->buf_ptr[0]; tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF; parse_flags = PARSE_FLAG_PREPROCESS | (parse_flags & PARSE_FLAG_ASM_FILE) | PARSE_FLAG_LINEFEED | PARSE_FLAG_SPACES | PARSE_FLAG_ACCEPT_STRAYS ; define_start = define_stack; /* Credits to Fabrice Bellard's initial revision to demonstrate its capability to compile and run itself, provided all numbers are given as decimals. tcc -E -P10 will do. */ if (s1->Pflag == 1 + 10) parse_flags |= PARSE_FLAG_TOK_NUM, s1->Pflag = 1; #ifdef PP_BENCH /* for PP benchmarks */ do next(); while (tok != TOK_EOF); return 0; #endif if (s1->dflag & 1) { pp_debug_builtins(s1); s1->dflag &= ~1; } token_seen = TOK_LINEFEED, spcs = 0; pp_line(s1, file, 0); for (;;) { iptr = s1->include_stack_ptr; next(); if (tok == TOK_EOF) break; level = s1->include_stack_ptr - iptr; if (level) { if (level > 0) pp_line(s1, *iptr, 0); pp_line(s1, file, level); } if (s1->dflag) { pp_debug_defines(s1); if (s1->dflag & 4) continue; } if (token_seen == TOK_LINEFEED) { if (tok == ' ') { ++spcs; continue; } if (tok == TOK_LINEFEED) { spcs = 0; continue; } pp_line(s1, file, 0); } else if (tok == TOK_LINEFEED) { ++file->line_ref; } tokstr = get_tok_str(tok, &tokc); if (!spcs && need_space(token_seen, tok, tokstr)) ++spcs; while (spcs) fputs(" ", s1->ppfp), --spcs; fputs(tokstr, s1->ppfp); token_seen = tok; } /* reset define stack, but keep -D and built-ins */ free_defines(define_start); return 0; } /* ------------------------------------------------------------------------- */