mirror of
https://github.com/frida/tinycc
synced 2024-11-28 02:29:38 +03:00
2892 lines
80 KiB
C
2892 lines
80 KiB
C
/*
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* TCC - Tiny C Compiler
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*
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* Copyright (c) 2001-2004 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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static const char tcc_keywords[] =
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#define DEF(id, str) str "\0"
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#include "tcctok.h"
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#undef DEF
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;
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/* WARNING: the content of this string encodes token numbers */
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static char tok_two_chars[] = "<=\236>=\235!=\225&&\240||\241++\244--\242==\224<<\1>>\2+=\253-=\255*=\252/=\257%=\245&=\246^=\336|=\374->\313..\250##\266";
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/* true if isid(c) || isnum(c) */
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static unsigned char isidnum_table[256-CH_EOF];
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struct macro_level {
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struct macro_level *prev;
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int *p;
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};
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static void next_nomacro(void);
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static void next_nomacro_spc(void);
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static void macro_subst(TokenString *tok_str, Sym **nested_list,
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const int *macro_str, struct macro_level **can_read_stream);
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/* allocate a new token */
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static TokenSym *tok_alloc_new(TokenSym **pts, const char *str, int len)
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{
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TokenSym *ts, **ptable;
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int i;
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if (tok_ident >= SYM_FIRST_ANOM)
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error("memory full");
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/* expand token table if needed */
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i = tok_ident - TOK_IDENT;
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if ((i % TOK_ALLOC_INCR) == 0) {
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ptable = tcc_realloc(table_ident, (i + TOK_ALLOC_INCR) * sizeof(TokenSym *));
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if (!ptable)
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error("memory full");
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table_ident = ptable;
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}
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ts = tcc_malloc(sizeof(TokenSym) + len);
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table_ident[i] = ts;
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ts->tok = tok_ident++;
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ts->sym_define = NULL;
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ts->sym_label = NULL;
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ts->sym_struct = NULL;
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ts->sym_identifier = NULL;
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ts->len = len;
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ts->hash_next = NULL;
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memcpy(ts->str, str, len);
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ts->str[len] = '\0';
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*pts = ts;
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return ts;
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}
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#define TOK_HASH_INIT 1
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#define TOK_HASH_FUNC(h, c) ((h) * 263 + (c))
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/* find a token and add it if not found */
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static TokenSym *tok_alloc(const char *str, int len)
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{
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TokenSym *ts, **pts;
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int i;
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unsigned int h;
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h = TOK_HASH_INIT;
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for(i=0;i<len;i++)
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h = TOK_HASH_FUNC(h, ((unsigned char *)str)[i]);
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h &= (TOK_HASH_SIZE - 1);
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pts = &hash_ident[h];
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for(;;) {
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ts = *pts;
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if (!ts)
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break;
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if (ts->len == len && !memcmp(ts->str, str, len))
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return ts;
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pts = &(ts->hash_next);
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}
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return tok_alloc_new(pts, str, len);
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}
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/* XXX: buffer overflow */
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/* XXX: float tokens */
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char *get_tok_str(int v, CValue *cv)
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{
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static char buf[STRING_MAX_SIZE + 1];
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static CString cstr_buf;
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CString *cstr;
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unsigned char *q;
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char *p;
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int i, len;
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/* NOTE: to go faster, we give a fixed buffer for small strings */
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cstr_reset(&cstr_buf);
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cstr_buf.data = buf;
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cstr_buf.size_allocated = sizeof(buf);
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p = buf;
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switch(v) {
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case TOK_CINT:
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case TOK_CUINT:
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/* XXX: not quite exact, but only useful for testing */
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sprintf(p, "%u", cv->ui);
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break;
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case TOK_CLLONG:
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case TOK_CULLONG:
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/* XXX: not quite exact, but only useful for testing */
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sprintf(p, "%Lu", cv->ull);
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break;
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case TOK_LCHAR:
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cstr_ccat(&cstr_buf, 'L');
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case TOK_CCHAR:
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cstr_ccat(&cstr_buf, '\'');
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add_char(&cstr_buf, cv->i);
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cstr_ccat(&cstr_buf, '\'');
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cstr_ccat(&cstr_buf, '\0');
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break;
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case TOK_PPNUM:
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cstr = cv->cstr;
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len = cstr->size - 1;
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for(i=0;i<len;i++)
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add_char(&cstr_buf, ((unsigned char *)cstr->data)[i]);
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cstr_ccat(&cstr_buf, '\0');
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break;
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case TOK_LSTR:
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cstr_ccat(&cstr_buf, 'L');
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case TOK_STR:
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cstr = cv->cstr;
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cstr_ccat(&cstr_buf, '\"');
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if (v == TOK_STR) {
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len = cstr->size - 1;
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for(i=0;i<len;i++)
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add_char(&cstr_buf, ((unsigned char *)cstr->data)[i]);
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} else {
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len = (cstr->size / sizeof(nwchar_t)) - 1;
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for(i=0;i<len;i++)
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add_char(&cstr_buf, ((nwchar_t *)cstr->data)[i]);
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}
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cstr_ccat(&cstr_buf, '\"');
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cstr_ccat(&cstr_buf, '\0');
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break;
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case TOK_LT:
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v = '<';
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goto addv;
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case TOK_GT:
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v = '>';
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goto addv;
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case TOK_DOTS:
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return strcpy(p, "...");
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case TOK_A_SHL:
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return strcpy(p, "<<=");
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case TOK_A_SAR:
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return strcpy(p, ">>=");
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default:
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if (v < TOK_IDENT) {
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/* search in two bytes table */
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q = tok_two_chars;
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while (*q) {
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if (q[2] == v) {
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*p++ = q[0];
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*p++ = q[1];
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*p = '\0';
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return buf;
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}
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q += 3;
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}
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addv:
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*p++ = v;
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*p = '\0';
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} else if (v < tok_ident) {
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return table_ident[v - TOK_IDENT]->str;
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} else if (v >= SYM_FIRST_ANOM) {
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/* special name for anonymous symbol */
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sprintf(p, "L.%u", v - SYM_FIRST_ANOM);
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} else {
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/* should never happen */
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return NULL;
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}
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break;
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}
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return cstr_buf.data;
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}
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/* fill input buffer and peek next char */
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static int tcc_peekc_slow(BufferedFile *bf)
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{
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int len;
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/* only tries to read if really end of buffer */
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if (bf->buf_ptr >= bf->buf_end) {
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if (bf->fd != -1) {
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#if defined(PARSE_DEBUG)
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len = 8;
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#else
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len = IO_BUF_SIZE;
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#endif
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len = read(bf->fd, bf->buffer, len);
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if (len < 0)
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len = 0;
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} else {
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len = 0;
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}
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total_bytes += len;
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bf->buf_ptr = bf->buffer;
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bf->buf_end = bf->buffer + len;
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*bf->buf_end = CH_EOB;
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}
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if (bf->buf_ptr < bf->buf_end) {
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return bf->buf_ptr[0];
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} else {
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bf->buf_ptr = bf->buf_end;
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return CH_EOF;
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}
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}
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/* return the current character, handling end of block if necessary
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(but not stray) */
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static int handle_eob(void)
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{
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return tcc_peekc_slow(file);
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}
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/* read next char from current input file and handle end of input buffer */
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static inline void inp(void)
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{
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ch = *(++(file->buf_ptr));
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/* end of buffer/file handling */
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if (ch == CH_EOB)
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ch = handle_eob();
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}
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/* handle '\[\r]\n' */
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static int handle_stray_noerror(void)
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{
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while (ch == '\\') {
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inp();
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if (ch == '\n') {
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file->line_num++;
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inp();
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} else if (ch == '\r') {
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inp();
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if (ch != '\n')
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goto fail;
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file->line_num++;
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inp();
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} else {
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fail:
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return 1;
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}
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}
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return 0;
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}
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static void handle_stray(void)
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{
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if (handle_stray_noerror())
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error("stray '\\' in program");
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}
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/* skip the stray and handle the \\n case. Output an error if
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incorrect char after the stray */
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static int handle_stray1(uint8_t *p)
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{
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int c;
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if (p >= file->buf_end) {
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file->buf_ptr = p;
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c = handle_eob();
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p = file->buf_ptr;
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if (c == '\\')
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goto parse_stray;
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} else {
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parse_stray:
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file->buf_ptr = p;
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ch = *p;
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handle_stray();
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p = file->buf_ptr;
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c = *p;
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}
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return c;
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}
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/* handle just the EOB case, but not stray */
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#define PEEKC_EOB(c, p)\
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{\
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p++;\
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c = *p;\
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if (c == '\\') {\
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file->buf_ptr = p;\
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c = handle_eob();\
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p = file->buf_ptr;\
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}\
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}
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/* handle the complicated stray case */
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#define PEEKC(c, p)\
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{\
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p++;\
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c = *p;\
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if (c == '\\') {\
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c = handle_stray1(p);\
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p = file->buf_ptr;\
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}\
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}
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/* input with '\[\r]\n' handling. Note that this function cannot
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handle other characters after '\', so you cannot call it inside
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strings or comments */
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static void minp(void)
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{
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inp();
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if (ch == '\\')
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handle_stray();
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}
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/* single line C++ comments */
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static uint8_t *parse_line_comment(uint8_t *p)
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{
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int c;
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p++;
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for(;;) {
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c = *p;
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redo:
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if (c == '\n' || c == CH_EOF) {
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break;
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} else if (c == '\\') {
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file->buf_ptr = p;
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c = handle_eob();
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p = file->buf_ptr;
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if (c == '\\') {
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PEEKC_EOB(c, p);
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if (c == '\n') {
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file->line_num++;
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PEEKC_EOB(c, p);
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} else if (c == '\r') {
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PEEKC_EOB(c, p);
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if (c == '\n') {
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file->line_num++;
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PEEKC_EOB(c, p);
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}
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}
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} else {
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goto redo;
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}
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} else {
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p++;
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}
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}
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return p;
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}
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/* C comments */
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static uint8_t *parse_comment(uint8_t *p)
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{
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int c;
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p++;
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for(;;) {
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/* fast skip loop */
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for(;;) {
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c = *p;
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if (c == '\n' || c == '*' || c == '\\')
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break;
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p++;
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c = *p;
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if (c == '\n' || c == '*' || c == '\\')
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break;
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p++;
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}
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/* now we can handle all the cases */
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if (c == '\n') {
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file->line_num++;
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p++;
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} else if (c == '*') {
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p++;
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for(;;) {
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c = *p;
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if (c == '*') {
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p++;
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} else if (c == '/') {
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goto end_of_comment;
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} else if (c == '\\') {
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file->buf_ptr = p;
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c = handle_eob();
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p = file->buf_ptr;
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if (c == '\\') {
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/* skip '\[\r]\n', otherwise just skip the stray */
|
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while (c == '\\') {
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PEEKC_EOB(c, p);
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if (c == '\n') {
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file->line_num++;
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PEEKC_EOB(c, p);
|
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} else if (c == '\r') {
|
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PEEKC_EOB(c, p);
|
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if (c == '\n') {
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file->line_num++;
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PEEKC_EOB(c, p);
|
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}
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} else {
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goto after_star;
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}
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}
|
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}
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} else {
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break;
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}
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}
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after_star: ;
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} else {
|
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/* stray, eob or eof */
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file->buf_ptr = p;
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c = handle_eob();
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p = file->buf_ptr;
|
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if (c == CH_EOF) {
|
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error("unexpected end of file in comment");
|
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} else if (c == '\\') {
|
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p++;
|
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}
|
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}
|
|
}
|
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end_of_comment:
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p++;
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return p;
|
|
}
|
|
|
|
#define cinp minp
|
|
|
|
static inline void skip_spaces(void)
|
|
{
|
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while (is_space(ch))
|
|
cinp();
|
|
}
|
|
|
|
static inline int check_space(int t, int *spc)
|
|
{
|
|
if (is_space(t)) {
|
|
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 */
|
|
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 */
|
|
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;
|
|
}
|
|
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' */
|
|
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' */
|
|
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_ext_size(int t)
|
|
{
|
|
switch(t) {
|
|
/* 4 bytes */
|
|
case TOK_CINT:
|
|
case TOK_CUINT:
|
|
case TOK_CCHAR:
|
|
case TOK_LCHAR:
|
|
case TOK_CFLOAT:
|
|
case TOK_LINENUM:
|
|
return 1;
|
|
case TOK_STR:
|
|
case TOK_LSTR:
|
|
case TOK_PPNUM:
|
|
error("unsupported token");
|
|
return 1;
|
|
case TOK_CDOUBLE:
|
|
case TOK_CLLONG:
|
|
case TOK_CULLONG:
|
|
return 2;
|
|
case TOK_CLDOUBLE:
|
|
return LDOUBLE_SIZE / 4;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* token string handling */
|
|
|
|
static inline void tok_str_new(TokenString *s)
|
|
{
|
|
s->str = NULL;
|
|
s->len = 0;
|
|
s->allocated_len = 0;
|
|
s->last_line_num = -1;
|
|
}
|
|
|
|
static void tok_str_free(int *str)
|
|
{
|
|
tcc_free(str);
|
|
}
|
|
|
|
static int *tok_str_realloc(TokenString *s)
|
|
{
|
|
int *str, len;
|
|
|
|
if (s->allocated_len == 0) {
|
|
len = 8;
|
|
} else {
|
|
len = s->allocated_len * 2;
|
|
}
|
|
str = tcc_realloc(s->str, len * sizeof(int));
|
|
if (!str)
|
|
error("memory full");
|
|
s->allocated_len = len;
|
|
s->str = str;
|
|
return str;
|
|
}
|
|
|
|
static 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);
|
|
str[len++] = t;
|
|
s->len = len;
|
|
}
|
|
|
|
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);
|
|
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_STR:
|
|
case TOK_LSTR:
|
|
{
|
|
int nb_words;
|
|
CString *cstr;
|
|
|
|
nb_words = (sizeof(CString) + cv->cstr->size + 3) >> 2;
|
|
while ((len + nb_words) > s->allocated_len)
|
|
str = tok_str_realloc(s);
|
|
cstr = (CString *)(str + len);
|
|
cstr->data = NULL;
|
|
cstr->size = cv->cstr->size;
|
|
cstr->data_allocated = NULL;
|
|
cstr->size_allocated = cstr->size;
|
|
memcpy((char *)cstr + sizeof(CString),
|
|
cv->cstr->data, cstr->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' */
|
|
static 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);
|
|
}
|
|
|
|
#if LDOUBLE_SIZE == 16
|
|
#define LDOUBLE_GET(p, cv) \
|
|
cv.tab[0] = p[0]; \
|
|
cv.tab[1] = p[1]; \
|
|
cv.tab[2] = p[2]; \
|
|
cv.tab[3] = p[3];
|
|
#elif LDOUBLE_SIZE == 12
|
|
#define LDOUBLE_GET(p, cv) \
|
|
cv.tab[0] = p[0]; \
|
|
cv.tab[1] = p[1]; \
|
|
cv.tab[2] = p[2];
|
|
#elif LDOUBLE_SIZE == 8
|
|
#define LDOUBLE_GET(p, cv) \
|
|
cv.tab[0] = p[0]; \
|
|
cv.tab[1] = p[1];
|
|
#else
|
|
#error add long double size support
|
|
#endif
|
|
|
|
|
|
/* get a token from an integer array and increment pointer
|
|
accordingly. we code it as a macro to avoid pointer aliasing. */
|
|
#define TOK_GET(t, p, cv) \
|
|
{ \
|
|
t = *p++; \
|
|
switch(t) { \
|
|
case TOK_CINT: \
|
|
case TOK_CUINT: \
|
|
case TOK_CCHAR: \
|
|
case TOK_LCHAR: \
|
|
case TOK_CFLOAT: \
|
|
case TOK_LINENUM: \
|
|
cv.tab[0] = *p++; \
|
|
break; \
|
|
case TOK_STR: \
|
|
case TOK_LSTR: \
|
|
case TOK_PPNUM: \
|
|
cv.cstr = (CString *)p; \
|
|
cv.cstr->data = (char *)p + sizeof(CString);\
|
|
p += (sizeof(CString) + cv.cstr->size + 3) >> 2;\
|
|
break; \
|
|
case TOK_CDOUBLE: \
|
|
case TOK_CLLONG: \
|
|
case TOK_CULLONG: \
|
|
cv.tab[0] = p[0]; \
|
|
cv.tab[1] = p[1]; \
|
|
p += 2; \
|
|
break; \
|
|
case TOK_CLDOUBLE: \
|
|
LDOUBLE_GET(p, cv); \
|
|
p += LDOUBLE_SIZE / 4; \
|
|
break; \
|
|
default: \
|
|
break; \
|
|
} \
|
|
}
|
|
|
|
/* defines handling */
|
|
static inline void define_push(int v, int macro_type, int *str, Sym *first_arg)
|
|
{
|
|
Sym *s;
|
|
|
|
s = sym_push2(&define_stack, v, macro_type, 0);
|
|
s->d = str;
|
|
s->next = first_arg;
|
|
table_ident[v - TOK_IDENT]->sym_define = s;
|
|
}
|
|
|
|
/* undefined a define symbol. Its name is just set to zero */
|
|
static void define_undef(Sym *s)
|
|
{
|
|
int v;
|
|
v = s->v;
|
|
if (v >= TOK_IDENT && v < tok_ident)
|
|
table_ident[v - TOK_IDENT]->sym_define = NULL;
|
|
s->v = 0;
|
|
}
|
|
|
|
static inline 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' */
|
|
static void free_defines(Sym *b)
|
|
{
|
|
Sym *top, *top1;
|
|
int v;
|
|
|
|
top = define_stack;
|
|
while (top != b) {
|
|
top1 = top->prev;
|
|
/* do not free args or predefined defines */
|
|
if (top->d)
|
|
tok_str_free(top->d);
|
|
v = top->v;
|
|
if (v >= TOK_IDENT && v < tok_ident)
|
|
table_ident[v - TOK_IDENT]->sym_define = NULL;
|
|
sym_free(top);
|
|
top = top1;
|
|
}
|
|
define_stack = b;
|
|
}
|
|
|
|
/* label lookup */
|
|
static Sym *label_find(int v)
|
|
{
|
|
v -= TOK_IDENT;
|
|
if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
|
|
return NULL;
|
|
return table_ident[v]->sym_label;
|
|
}
|
|
|
|
static 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. */
|
|
static 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) {
|
|
warning("label '%s' declared but not used", get_tok_str(s->v, NULL));
|
|
} else if (s->r == LABEL_FORWARD) {
|
|
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, (long)s->next, 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;
|
|
|
|
tok_str_new(&str);
|
|
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 */
|
|
macro_ptr = str.str;
|
|
next();
|
|
c = expr_const();
|
|
macro_ptr = NULL;
|
|
tok_str_free(str.str);
|
|
return c != 0;
|
|
}
|
|
|
|
#if defined(PARSE_DEBUG) || defined(PP_DEBUG)
|
|
static void tok_print(int *str)
|
|
{
|
|
int t;
|
|
CValue cval;
|
|
|
|
printf("<");
|
|
while (1) {
|
|
TOK_GET(t, str, cval);
|
|
if (!t)
|
|
break;
|
|
printf("%s", get_tok_str(t, &cval));
|
|
}
|
|
printf(">\n");
|
|
}
|
|
#endif
|
|
|
|
/* parse after #define */
|
|
static void parse_define(void)
|
|
{
|
|
Sym *s, *first, **ps;
|
|
int v, t, varg, is_vaargs, spc;
|
|
TokenString str;
|
|
|
|
v = tok;
|
|
if (v < TOK_IDENT)
|
|
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 */
|
|
next_nomacro_spc();
|
|
if (tok == '(') {
|
|
next_nomacro();
|
|
ps = &first;
|
|
while (tok != ')') {
|
|
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)
|
|
error("badly punctuated parameter list");
|
|
s = sym_push2(&define_stack, varg | SYM_FIELD, is_vaargs, 0);
|
|
*ps = s;
|
|
ps = &s->next;
|
|
if (tok != ',')
|
|
break;
|
|
next_nomacro();
|
|
}
|
|
if (tok == ')')
|
|
next_nomacro_spc();
|
|
t = MACRO_FUNC;
|
|
}
|
|
tok_str_new(&str);
|
|
spc = 2;
|
|
/* EOF testing necessary for '-D' handling */
|
|
while (tok != TOK_LINEFEED && tok != TOK_EOF) {
|
|
/* remove spaces around ## and after '#' */
|
|
if (TOK_TWOSHARPS == tok) {
|
|
if (1 == spc)
|
|
--str.len;
|
|
spc = 2;
|
|
} else if ('#' == tok) {
|
|
spc = 2;
|
|
} else if (check_space(tok, &spc)) {
|
|
goto skip;
|
|
}
|
|
tok_str_add2(&str, tok, &tokc);
|
|
skip:
|
|
next_nomacro_spc();
|
|
}
|
|
if (spc == 1)
|
|
--str.len; /* remove trailing space */
|
|
tok_str_add(&str, 0);
|
|
#ifdef PP_DEBUG
|
|
printf("define %s %d: ", get_tok_str(v, NULL), t);
|
|
tok_print(str.str);
|
|
#endif
|
|
define_push(v, t, str.str, first);
|
|
}
|
|
|
|
static inline int hash_cached_include(int type, const char *filename)
|
|
{
|
|
const unsigned char *s;
|
|
unsigned int h;
|
|
|
|
h = TOK_HASH_INIT;
|
|
h = TOK_HASH_FUNC(h, type);
|
|
s = filename;
|
|
while (*s) {
|
|
h = TOK_HASH_FUNC(h, *s);
|
|
s++;
|
|
}
|
|
h &= (CACHED_INCLUDES_HASH_SIZE - 1);
|
|
return h;
|
|
}
|
|
|
|
/* XXX: use a token or a hash table to accelerate matching ? */
|
|
static CachedInclude *search_cached_include(TCCState *s1,
|
|
int type, const char *filename)
|
|
{
|
|
CachedInclude *e;
|
|
int i, h;
|
|
h = hash_cached_include(type, filename);
|
|
i = s1->cached_includes_hash[h];
|
|
for(;;) {
|
|
if (i == 0)
|
|
break;
|
|
e = s1->cached_includes[i - 1];
|
|
if (e->type == type && !PATHCMP(e->filename, filename))
|
|
return e;
|
|
i = e->hash_next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline void add_cached_include(TCCState *s1, int type,
|
|
const char *filename, int ifndef_macro)
|
|
{
|
|
CachedInclude *e;
|
|
int h;
|
|
|
|
if (search_cached_include(s1, type, filename))
|
|
return;
|
|
#ifdef INC_DEBUG
|
|
printf("adding cached '%s' %s\n", filename, get_tok_str(ifndef_macro, NULL));
|
|
#endif
|
|
e = tcc_malloc(sizeof(CachedInclude) + strlen(filename));
|
|
if (!e)
|
|
return;
|
|
e->type = type;
|
|
strcpy(e->filename, filename);
|
|
e->ifndef_macro = ifndef_macro;
|
|
dynarray_add((void ***)&s1->cached_includes, &s1->nb_cached_includes, e);
|
|
/* add in hash table */
|
|
h = hash_cached_include(type, filename);
|
|
e->hash_next = s1->cached_includes_hash[h];
|
|
s1->cached_includes_hash[h] = s1->nb_cached_includes;
|
|
}
|
|
|
|
static void pragma_parse(TCCState *s1)
|
|
{
|
|
int val;
|
|
|
|
next();
|
|
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:
|
|
error("out of pack stack");
|
|
}
|
|
s1->pack_stack_ptr--;
|
|
} else {
|
|
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) {
|
|
pack_error:
|
|
error("invalid pack pragma");
|
|
}
|
|
val = tokc.i;
|
|
if (val < 1 || val > 16 || (val & (val - 1)) != 0)
|
|
goto pack_error;
|
|
next();
|
|
}
|
|
*s1->pack_stack_ptr = val;
|
|
skip(')');
|
|
}
|
|
}
|
|
}
|
|
|
|
/* is_bof is true if first non space token at beginning of file */
|
|
static 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_LINEFEED;
|
|
next_nomacro();
|
|
redo:
|
|
switch(tok) {
|
|
case TOK_DEFINE:
|
|
next_nomacro();
|
|
parse_define();
|
|
break;
|
|
case TOK_UNDEF:
|
|
next_nomacro();
|
|
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:
|
|
error("'#include' expects \"FILENAME\" or <FILENAME>");
|
|
}
|
|
pstrcat(buf, sizeof(buf), (char *)tokc.cstr->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)
|
|
error("#include recursion too deep");
|
|
|
|
n = s1->nb_include_paths + s1->nb_sysinclude_paths;
|
|
for (i = -2; i < n; ++i) {
|
|
char buf1[sizeof file->filename];
|
|
BufferedFile *f;
|
|
CachedInclude *e;
|
|
const char *path;
|
|
int size;
|
|
|
|
if (i == -2) {
|
|
/* 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;
|
|
size = tcc_basename(file->filename) - file->filename;
|
|
memcpy(buf1, file->filename, size);
|
|
buf1[size] = '\0';
|
|
|
|
} else {
|
|
/* search in all the include paths */
|
|
if (i < s1->nb_include_paths)
|
|
path = s1->include_paths[i];
|
|
else
|
|
path = s1->sysinclude_paths[i - s1->nb_include_paths];
|
|
pstrcpy(buf1, sizeof(buf1), path);
|
|
pstrcat(buf1, sizeof(buf1), "/");
|
|
}
|
|
|
|
pstrcat(buf1, sizeof(buf1), buf);
|
|
|
|
e = search_cached_include(s1, c, buf1);
|
|
if (e && define_find(e->ifndef_macro)) {
|
|
/* no need to parse the include because the 'ifndef macro'
|
|
is defined */
|
|
#ifdef INC_DEBUG
|
|
printf("%s: skipping %s\n", file->filename, buf);
|
|
#endif
|
|
f = NULL;
|
|
} else {
|
|
f = tcc_open(s1, buf1);
|
|
if (!f)
|
|
continue;
|
|
}
|
|
|
|
if (tok == TOK_INCLUDE_NEXT) {
|
|
tok = TOK_INCLUDE;
|
|
if (f)
|
|
tcc_close(f);
|
|
continue;
|
|
}
|
|
|
|
if (!f)
|
|
goto include_done;
|
|
|
|
#ifdef INC_DEBUG
|
|
printf("%s: including %s\n", file->filename, buf1);
|
|
#endif
|
|
|
|
/* XXX: fix current line init */
|
|
/* push current file in stack */
|
|
*s1->include_stack_ptr++ = file;
|
|
f->inc_type = c;
|
|
pstrcpy(f->inc_filename, sizeof(f->inc_filename), buf1);
|
|
file = f;
|
|
/* add include file debug info */
|
|
if (tcc_state->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;
|
|
}
|
|
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)
|
|
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)
|
|
error("memory full");
|
|
*s1->ifdef_stack_ptr++ = c;
|
|
goto test_skip;
|
|
case TOK_ELSE:
|
|
if (s1->ifdef_stack_ptr == s1->ifdef_stack)
|
|
error("#else without matching #if");
|
|
if (s1->ifdef_stack_ptr[-1] & 2)
|
|
error("#else after #else");
|
|
c = (s1->ifdef_stack_ptr[-1] ^= 3);
|
|
goto test_skip;
|
|
case TOK_ELIF:
|
|
if (s1->ifdef_stack_ptr == s1->ifdef_stack)
|
|
error("#elif without matching #if");
|
|
c = s1->ifdef_stack_ptr[-1];
|
|
if (c > 1)
|
|
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_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)
|
|
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_LINE:
|
|
next();
|
|
if (tok != TOK_CINT)
|
|
error("#line");
|
|
file->line_num = tokc.i - 1; /* the line number will be incremented after */
|
|
next();
|
|
if (tok != TOK_LINEFEED) {
|
|
if (tok != TOK_STR)
|
|
error("#line");
|
|
pstrcpy(file->filename, sizeof(file->filename),
|
|
(char *)tokc.cstr->data);
|
|
}
|
|
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)
|
|
error("#error %s", buf);
|
|
else
|
|
warning("#warning %s", buf);
|
|
break;
|
|
case TOK_PRAGMA:
|
|
pragma_parse(s1);
|
|
break;
|
|
default:
|
|
if (tok == TOK_LINEFEED || tok == '!' || tok == TOK_CINT) {
|
|
/* '!' is ignored to allow C scripts. numbers are ignored
|
|
to emulate cpp behaviour */
|
|
} else {
|
|
if (!(saved_parse_flags & PARSE_FLAG_ASM_COMMENTS))
|
|
warning("Ignoring unknown preprocessing directive #%s", get_tok_str(tok, &tokc));
|
|
}
|
|
break;
|
|
}
|
|
/* 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 <= '~')
|
|
warning("unknown escape sequence: \'\\%c\'", c);
|
|
else
|
|
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');
|
|
}
|
|
|
|
/* we use 64 bit numbers */
|
|
#define BN_SIZE 2
|
|
|
|
/* bn = (bn << shift) | or_val */
|
|
void bn_lshift(unsigned int *bn, int shift, int or_val)
|
|
{
|
|
int i;
|
|
unsigned int v;
|
|
for(i=0;i<BN_SIZE;i++) {
|
|
v = bn[i];
|
|
bn[i] = (v << shift) | or_val;
|
|
or_val = v >> (32 - shift);
|
|
}
|
|
}
|
|
|
|
void bn_zero(unsigned int *bn)
|
|
{
|
|
int i;
|
|
for(i=0;i<BN_SIZE;i++) {
|
|
bn[i] = 0;
|
|
}
|
|
}
|
|
|
|
/* parse number in null terminated string 'p' and return it in the
|
|
current token */
|
|
void parse_number(const char *p)
|
|
{
|
|
int b, t, shift, frac_bits, s, exp_val, ch;
|
|
char *q;
|
|
unsigned int bn[BN_SIZE];
|
|
double d;
|
|
|
|
/* number */
|
|
q = token_buf;
|
|
ch = *p++;
|
|
t = ch;
|
|
ch = *p++;
|
|
*q++ = t;
|
|
b = 10;
|
|
if (t == '.') {
|
|
goto float_frac_parse;
|
|
} else if (t == '0') {
|
|
if (ch == 'x' || ch == 'X') {
|
|
q--;
|
|
ch = *p++;
|
|
b = 16;
|
|
} else if (tcc_ext && (ch == 'b' || ch == 'B')) {
|
|
q--;
|
|
ch = *p++;
|
|
b = 2;
|
|
}
|
|
}
|
|
/* parse all digits. cannot check octal numbers at this stage
|
|
because of floating point constants */
|
|
while (1) {
|
|
if (ch >= '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:
|
|
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 = 2;
|
|
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)
|
|
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++;
|
|
tok = TOK_CLDOUBLE;
|
|
/* XXX: not large enough */
|
|
tokc.ld = (long double)d;
|
|
} 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++;
|
|
tok = TOK_CLDOUBLE;
|
|
tokc.ld = strtold(token_buf, NULL);
|
|
} else {
|
|
tok = TOK_CDOUBLE;
|
|
tokc.d = strtod(token_buf, NULL);
|
|
}
|
|
}
|
|
} else {
|
|
unsigned long long n, n1;
|
|
int lcount, ucount;
|
|
|
|
/* 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)
|
|
error("invalid digit");
|
|
}
|
|
n1 = n;
|
|
n = n * b + t;
|
|
/* detect overflow */
|
|
/* XXX: this test is not reliable */
|
|
if (n < n1)
|
|
error("integer constant overflow");
|
|
}
|
|
|
|
/* XXX: not exactly ANSI compliant */
|
|
if ((n & 0xffffffff00000000LL) != 0) {
|
|
if ((n >> 63) != 0)
|
|
tok = TOK_CULLONG;
|
|
else
|
|
tok = TOK_CLLONG;
|
|
} else if (n > 0x7fffffff) {
|
|
tok = TOK_CUINT;
|
|
} else {
|
|
tok = TOK_CINT;
|
|
}
|
|
lcount = 0;
|
|
ucount = 0;
|
|
for(;;) {
|
|
t = toup(ch);
|
|
if (t == 'L') {
|
|
if (lcount >= 2)
|
|
error("three 'l's in integer constant");
|
|
lcount++;
|
|
if (lcount == 2) {
|
|
if (tok == TOK_CINT)
|
|
tok = TOK_CLLONG;
|
|
else if (tok == TOK_CUINT)
|
|
tok = TOK_CULLONG;
|
|
}
|
|
ch = *p++;
|
|
} else if (t == 'U') {
|
|
if (ucount >= 1)
|
|
error("two 'u's in integer constant");
|
|
ucount++;
|
|
if (tok == TOK_CINT)
|
|
tok = TOK_CUINT;
|
|
else if (tok == TOK_CLLONG)
|
|
tok = TOK_CULLONG;
|
|
ch = *p++;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if (tok == TOK_CINT || tok == TOK_CUINT)
|
|
tokc.ui = n;
|
|
else
|
|
tokc.ull = n;
|
|
}
|
|
if (ch)
|
|
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;
|
|
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++;
|
|
goto keep_tok_flags;
|
|
case '\f':
|
|
case '\v':
|
|
case '\r':
|
|
p++;
|
|
goto redo_no_start;
|
|
case '\\':
|
|
/* first look if it is in fact an end of buffer */
|
|
if (p >= file->buf_end) {
|
|
file->buf_ptr = p;
|
|
handle_eob();
|
|
p = file->buf_ptr;
|
|
if (p >= file->buf_end)
|
|
goto parse_eof;
|
|
else
|
|
goto redo_no_start;
|
|
} else {
|
|
file->buf_ptr = p;
|
|
ch = *p;
|
|
handle_stray();
|
|
p = file->buf_ptr;
|
|
goto redo_no_start;
|
|
}
|
|
parse_eof:
|
|
{
|
|
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 (s1->include_stack_ptr == s1->include_stack ||
|
|
!(parse_flags & PARSE_FLAG_PREPROCESS)) {
|
|
/* 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
|
|
add_cached_include(s1, file->inc_type, file->inc_filename,
|
|
file->ifndef_macro_saved);
|
|
}
|
|
|
|
/* add end of include file debug info */
|
|
if (tcc_state->do_debug) {
|
|
put_stabd(N_EINCL, 0, 0);
|
|
}
|
|
/* pop include stack */
|
|
tcc_close(file);
|
|
s1->include_stack_ptr--;
|
|
file = *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_COMMENTS) {
|
|
p = parse_line_comment(p - 1);
|
|
goto redo_no_start;
|
|
} else {
|
|
tok = '#';
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
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);
|
|
p++;
|
|
for(;;) {
|
|
c = *p;
|
|
if (!isidnum_table[c-CH_EOF])
|
|
break;
|
|
h = TOK_HASH_FUNC(h, c);
|
|
p++;
|
|
}
|
|
if (c != '\\') {
|
|
TokenSym **pts;
|
|
int len;
|
|
|
|
/* fast case : no stray found, so we have the full token
|
|
and we have already hashed it */
|
|
len = p - p1;
|
|
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, p1, len);
|
|
token_found: ;
|
|
} else {
|
|
/* slower case */
|
|
cstr_reset(&tokcstr);
|
|
|
|
while (p1 < p) {
|
|
cstr_ccat(&tokcstr, *p1);
|
|
p1++;
|
|
}
|
|
p--;
|
|
PEEKC(c, p);
|
|
parse_ident_slow:
|
|
while (isidnum_table[c-CH_EOF]) {
|
|
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 (!(isnum(c) || isid(c) || c == '.' ||
|
|
((c == '+' || c == '-') &&
|
|
(t == 'e' || t == 'E' || t == 'p' || t == 'P'))))
|
|
break;
|
|
}
|
|
/* We add a trailing '\0' to ease parsing */
|
|
cstr_ccat(&tokcstr, '\0');
|
|
tokc.cstr = &tokcstr;
|
|
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 (c == '.') {
|
|
PEEKC(c, p);
|
|
if (c != '.')
|
|
expect("'.'");
|
|
PEEKC(c, p);
|
|
tok = TOK_DOTS;
|
|
} else {
|
|
tok = '.';
|
|
}
|
|
break;
|
|
case '\'':
|
|
case '\"':
|
|
is_long = 0;
|
|
str_const:
|
|
{
|
|
CString str;
|
|
int sep;
|
|
|
|
sep = c;
|
|
|
|
/* parse the string */
|
|
cstr_new(&str);
|
|
p = parse_pp_string(p, sep, &str);
|
|
cstr_ccat(&str, '\0');
|
|
|
|
/* eval the escape (should be done as TOK_PPNUM) */
|
|
cstr_reset(&tokcstr);
|
|
parse_escape_string(&tokcstr, str.data, is_long);
|
|
cstr_free(&str);
|
|
|
|
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)
|
|
error("empty character constant");
|
|
if (tokcstr.size > 2 * char_size)
|
|
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.cstr = &tokcstr;
|
|
if (!is_long)
|
|
tok = TOK_STR;
|
|
else
|
|
tok = TOK_LSTR;
|
|
}
|
|
}
|
|
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);
|
|
goto redo_no_start;
|
|
} else if (c == '/') {
|
|
p = parse_line_comment(p);
|
|
goto redo_no_start;
|
|
} 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 */
|
|
case '@': /* dito */
|
|
tok = c;
|
|
p++;
|
|
break;
|
|
default:
|
|
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, macro_ptr, tokc);
|
|
if (tok == TOK_LINENUM) {
|
|
file->line_num = tokc.i;
|
|
goto redo;
|
|
}
|
|
}
|
|
} else {
|
|
next_nomacro1();
|
|
}
|
|
}
|
|
|
|
static void next_nomacro(void)
|
|
{
|
|
do {
|
|
next_nomacro_spc();
|
|
} while (is_space(tok));
|
|
}
|
|
|
|
/* substitute args in macro_str and return allocated string */
|
|
static int *macro_arg_subst(Sym **nested_list, int *macro_str, Sym *args)
|
|
{
|
|
int *st, last_tok, t, spc;
|
|
Sym *s;
|
|
CValue cval;
|
|
TokenString str;
|
|
CString cstr;
|
|
|
|
tok_str_new(&str);
|
|
last_tok = 0;
|
|
while(1) {
|
|
TOK_GET(t, macro_str, cval);
|
|
if (!t)
|
|
break;
|
|
if (t == '#') {
|
|
/* stringize */
|
|
TOK_GET(t, macro_str, cval);
|
|
if (!t)
|
|
break;
|
|
s = sym_find2(args, t);
|
|
if (s) {
|
|
cstr_new(&cstr);
|
|
st = s->d;
|
|
spc = 0;
|
|
while (*st) {
|
|
TOK_GET(t, st, cval);
|
|
if (!check_space(t, &spc))
|
|
cstr_cat(&cstr, get_tok_str(t, &cval));
|
|
}
|
|
cstr.size -= spc;
|
|
cstr_ccat(&cstr, '\0');
|
|
#ifdef PP_DEBUG
|
|
printf("stringize: %s\n", (char *)cstr.data);
|
|
#endif
|
|
/* add string */
|
|
cval.cstr = &cstr;
|
|
tok_str_add2(&str, TOK_STR, &cval);
|
|
cstr_free(&cstr);
|
|
} else {
|
|
tok_str_add2(&str, t, &cval);
|
|
}
|
|
} else if (t >= TOK_IDENT) {
|
|
s = sym_find2(args, t);
|
|
if (s) {
|
|
st = s->d;
|
|
/* if '##' is present before or after, no arg substitution */
|
|
if (*macro_str == TOK_TWOSHARPS || last_tok == TOK_TWOSHARPS) {
|
|
/* special case for var arg macros : ## eats the
|
|
',' if empty VA_ARGS variable. */
|
|
/* XXX: test of the ',' is not 100%
|
|
reliable. should fix it to avoid security
|
|
problems */
|
|
if (gnu_ext && s->type.t &&
|
|
last_tok == TOK_TWOSHARPS &&
|
|
str.len >= 2 && str.str[str.len - 2] == ',') {
|
|
if (*st == 0) {
|
|
/* suppress ',' '##' */
|
|
str.len -= 2;
|
|
} else {
|
|
/* suppress '##' and add variable */
|
|
str.len--;
|
|
goto add_var;
|
|
}
|
|
} else {
|
|
int t1;
|
|
add_var:
|
|
for(;;) {
|
|
TOK_GET(t1, st, cval);
|
|
if (!t1)
|
|
break;
|
|
tok_str_add2(&str, t1, &cval);
|
|
}
|
|
}
|
|
} else {
|
|
/* NOTE: the stream cannot be read when macro
|
|
substituing an argument */
|
|
macro_subst(&str, nested_list, st, NULL);
|
|
}
|
|
} else {
|
|
tok_str_add(&str, t);
|
|
}
|
|
} else {
|
|
tok_str_add2(&str, t, &cval);
|
|
}
|
|
last_tok = 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"
|
|
};
|
|
|
|
/* 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, struct macro_level **can_read_stream)
|
|
{
|
|
Sym *args, *sa, *sa1;
|
|
int mstr_allocated, parlevel, *mstr, t, t1, *p, 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);
|
|
cstr_ccat(&cstr, '\0');
|
|
cval.cstr = &cstr;
|
|
tok_str_add2(tok_str, t1, &cval);
|
|
cstr_free(&cstr);
|
|
} else {
|
|
mstr = s->d;
|
|
mstr_allocated = 0;
|
|
if (s->type.t == MACRO_FUNC) {
|
|
/* NOTE: we do not use next_nomacro to avoid eating the
|
|
next token. XXX: find better solution */
|
|
redo:
|
|
if (macro_ptr) {
|
|
p = macro_ptr;
|
|
while (is_space(t = *p) || TOK_LINEFEED == t)
|
|
++p;
|
|
if (t == 0 && can_read_stream) {
|
|
/* end of macro stream: we must look at the token
|
|
after in the file */
|
|
struct macro_level *ml = *can_read_stream;
|
|
macro_ptr = NULL;
|
|
if (ml)
|
|
{
|
|
macro_ptr = ml->p;
|
|
ml->p = NULL;
|
|
*can_read_stream = ml -> prev;
|
|
}
|
|
goto redo;
|
|
}
|
|
} else {
|
|
/* XXX: incorrect with comments */
|
|
ch = file->buf_ptr[0];
|
|
while (is_space(ch) || ch == '\n')
|
|
cinp();
|
|
t = ch;
|
|
}
|
|
if (t != '(') /* no macro subst */
|
|
return -1;
|
|
|
|
/* argument macro */
|
|
next_nomacro();
|
|
next_nomacro();
|
|
args = NULL;
|
|
sa = s->next;
|
|
/* NOTE: empty args are allowed, except if no args */
|
|
for(;;) {
|
|
/* handle '()' case */
|
|
if (!args && !sa && tok == ')')
|
|
break;
|
|
if (!sa)
|
|
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))) &&
|
|
tok != -1) {
|
|
if (tok == '(')
|
|
parlevel++;
|
|
else if (tok == ')')
|
|
parlevel--;
|
|
if (tok == TOK_LINEFEED)
|
|
tok = ' ';
|
|
if (!check_space(tok, &spc))
|
|
tok_str_add2(&str, tok, &tokc);
|
|
next_nomacro_spc();
|
|
}
|
|
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)
|
|
continue;
|
|
else
|
|
break;
|
|
}
|
|
if (tok != ',')
|
|
expect(",");
|
|
next_nomacro();
|
|
}
|
|
if (sa) {
|
|
error("macro '%s' used with too few args",
|
|
get_tok_str(s->v, 0));
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
mstr_allocated = 1;
|
|
}
|
|
sym_push2(nested_list, s->v, 0, 0);
|
|
macro_subst(tok_str, nested_list, mstr, can_read_stream);
|
|
/* pop nested defined symbol */
|
|
sa1 = *nested_list;
|
|
*nested_list = sa1->prev;
|
|
sym_free(sa1);
|
|
if (mstr_allocated)
|
|
tok_str_free(mstr);
|
|
}
|
|
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 *macro_str)
|
|
{
|
|
const int *ptr;
|
|
int t;
|
|
CValue cval;
|
|
TokenString macro_str1;
|
|
CString cstr;
|
|
char *p;
|
|
int n;
|
|
|
|
/* we search the first '##' */
|
|
for(ptr = macro_str;;) {
|
|
TOK_GET(t, ptr, cval);
|
|
if (t == TOK_TWOSHARPS)
|
|
break;
|
|
/* nothing more to do if end of string */
|
|
if (t == 0)
|
|
return NULL;
|
|
}
|
|
|
|
/* we saw '##', so we need more processing to handle it */
|
|
tok_str_new(¯o_str1);
|
|
for(ptr = macro_str;;) {
|
|
TOK_GET(tok, ptr, tokc);
|
|
if (tok == 0)
|
|
break;
|
|
if (tok == TOK_TWOSHARPS)
|
|
continue;
|
|
while (*ptr == TOK_TWOSHARPS) {
|
|
t = *++ptr;
|
|
if (t && t != TOK_TWOSHARPS) {
|
|
TOK_GET(t, ptr, cval);
|
|
|
|
/* We concatenate the two tokens */
|
|
cstr_new(&cstr);
|
|
cstr_cat(&cstr, get_tok_str(tok, &tokc));
|
|
n = cstr.size;
|
|
cstr_cat(&cstr, get_tok_str(t, &cval));
|
|
cstr_ccat(&cstr, '\0');
|
|
|
|
p = file->buf_ptr;
|
|
file->buf_ptr = cstr.data;
|
|
for (;;) {
|
|
next_nomacro1();
|
|
if (0 == *file->buf_ptr)
|
|
break;
|
|
tok_str_add2(¯o_str1, tok, &tokc);
|
|
|
|
warning("pasting \"%.*s\" and \"%s\" does not give a valid preprocessing token",
|
|
n, cstr.data, (char*)cstr.data + n);
|
|
}
|
|
file->buf_ptr = p;
|
|
cstr_reset(&cstr);
|
|
}
|
|
}
|
|
tok_str_add2(¯o_str1, tok, &tokc);
|
|
}
|
|
tok_str_add(¯o_str1, 0);
|
|
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, struct macro_level ** can_read_stream)
|
|
{
|
|
Sym *s;
|
|
int *macro_str1;
|
|
const int *ptr;
|
|
int t, ret, spc;
|
|
CValue cval;
|
|
struct macro_level ml;
|
|
|
|
/* first scan for '##' operator handling */
|
|
ptr = macro_str;
|
|
macro_str1 = macro_twosharps(ptr);
|
|
if (macro_str1)
|
|
ptr = macro_str1;
|
|
spc = 0;
|
|
while (1) {
|
|
/* NOTE: ptr == NULL can only happen if tokens are read from
|
|
file stream due to a macro function call */
|
|
if (ptr == NULL)
|
|
break;
|
|
TOK_GET(t, ptr, cval);
|
|
if (t == 0)
|
|
break;
|
|
s = define_find(t);
|
|
if (s != NULL) {
|
|
/* if nested substitution, do nothing */
|
|
if (sym_find2(*nested_list, t))
|
|
goto no_subst;
|
|
ml.p = macro_ptr;
|
|
if (can_read_stream)
|
|
ml.prev = *can_read_stream, *can_read_stream = &ml;
|
|
macro_ptr = (int *)ptr;
|
|
tok = t;
|
|
ret = macro_subst_tok(tok_str, nested_list, s, can_read_stream);
|
|
ptr = (int *)macro_ptr;
|
|
macro_ptr = ml.p;
|
|
if (can_read_stream && *can_read_stream == &ml)
|
|
*can_read_stream = ml.prev;
|
|
if (ret != 0)
|
|
goto no_subst;
|
|
} else {
|
|
no_subst:
|
|
if (!check_space(t, &spc))
|
|
tok_str_add2(tok_str, t, &cval);
|
|
}
|
|
}
|
|
if (macro_str1)
|
|
tok_str_free(macro_str1);
|
|
}
|
|
|
|
/* return next token with macro substitution */
|
|
static void next(void)
|
|
{
|
|
Sym *nested_list, *s;
|
|
TokenString str;
|
|
struct macro_level *ml;
|
|
|
|
redo:
|
|
if (parse_flags & PARSE_FLAG_SPACES)
|
|
next_nomacro_spc();
|
|
else
|
|
next_nomacro();
|
|
if (!macro_ptr) {
|
|
/* if not reading from macro substituted string, then try
|
|
to substitute macros */
|
|
if (tok >= TOK_IDENT &&
|
|
(parse_flags & PARSE_FLAG_PREPROCESS)) {
|
|
s = define_find(tok);
|
|
if (s) {
|
|
/* we have a macro: we try to substitute */
|
|
tok_str_new(&str);
|
|
nested_list = NULL;
|
|
ml = NULL;
|
|
if (macro_subst_tok(&str, &nested_list, s, &ml) == 0) {
|
|
/* substitution done, NOTE: maybe empty */
|
|
tok_str_add(&str, 0);
|
|
macro_ptr = str.str;
|
|
macro_ptr_allocated = str.str;
|
|
goto redo;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (tok == 0) {
|
|
/* end of macro or end of unget buffer */
|
|
if (unget_buffer_enabled) {
|
|
macro_ptr = unget_saved_macro_ptr;
|
|
unget_buffer_enabled = 0;
|
|
} else {
|
|
/* end of macro string: free it */
|
|
tok_str_free(macro_ptr_allocated);
|
|
macro_ptr = NULL;
|
|
}
|
|
goto redo;
|
|
}
|
|
}
|
|
|
|
/* convert preprocessor tokens into C tokens */
|
|
if (tok == TOK_PPNUM &&
|
|
(parse_flags & PARSE_FLAG_TOK_NUM)) {
|
|
parse_number((char *)tokc.cstr->data);
|
|
}
|
|
}
|
|
|
|
/* push back current token and set current token to 'last_tok'. Only
|
|
identifier case handled for labels. */
|
|
static inline void unget_tok(int last_tok)
|
|
{
|
|
int i, n;
|
|
int *q;
|
|
unget_saved_macro_ptr = macro_ptr;
|
|
unget_buffer_enabled = 1;
|
|
q = unget_saved_buffer;
|
|
macro_ptr = q;
|
|
*q++ = tok;
|
|
n = tok_ext_size(tok) - 1;
|
|
for(i=0;i<n;i++)
|
|
*q++ = tokc.tab[i];
|
|
*q = 0; /* end of token string */
|
|
tok = last_tok;
|
|
}
|
|
|
|
|
|
/* better than nothing, but needs extension to handle '-E' option
|
|
correctly too */
|
|
static 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;
|
|
|
|
/* XXX: not ANSI compliant: bound checking says error */
|
|
vtop = vstack - 1;
|
|
s1->pack_stack[0] = 0;
|
|
s1->pack_stack_ptr = s1->pack_stack;
|
|
}
|
|
|
|
void preprocess_new()
|
|
{
|
|
int i, c;
|
|
const char *p, *r;
|
|
TokenSym *ts;
|
|
|
|
/* init isid table */
|
|
for(i=CH_EOF;i<256;i++)
|
|
isidnum_table[i-CH_EOF] = isid(i) || isnum(i);
|
|
|
|
/* add all tokens */
|
|
table_ident = NULL;
|
|
memset(hash_ident, 0, TOK_HASH_SIZE * sizeof(TokenSym *));
|
|
|
|
tok_ident = TOK_IDENT;
|
|
p = tcc_keywords;
|
|
while (*p) {
|
|
r = p;
|
|
for(;;) {
|
|
c = *r++;
|
|
if (c == '\0')
|
|
break;
|
|
}
|
|
ts = tok_alloc(p, r - p - 1);
|
|
p = r;
|
|
}
|
|
}
|
|
|
|
/* Preprocess the current file */
|
|
static int tcc_preprocess(TCCState *s1)
|
|
{
|
|
Sym *define_start;
|
|
BufferedFile *file_ref, **iptr, **iptr_new;
|
|
int token_seen, line_ref, d;
|
|
const char *s;
|
|
|
|
preprocess_init(s1);
|
|
define_start = define_stack;
|
|
ch = file->buf_ptr[0];
|
|
tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
|
|
parse_flags = PARSE_FLAG_ASM_COMMENTS | PARSE_FLAG_PREPROCESS |
|
|
PARSE_FLAG_LINEFEED | PARSE_FLAG_SPACES;
|
|
token_seen = 0;
|
|
line_ref = 0;
|
|
file_ref = NULL;
|
|
|
|
iptr = s1->include_stack_ptr;
|
|
for (;;) {
|
|
next();
|
|
if (tok == TOK_EOF) {
|
|
break;
|
|
} else if (file != file_ref) {
|
|
goto print_line;
|
|
} else if (tok == TOK_LINEFEED) {
|
|
if (!token_seen)
|
|
continue;
|
|
++line_ref;
|
|
token_seen = 0;
|
|
} else if (!token_seen) {
|
|
d = file->line_num - line_ref;
|
|
if (file != file_ref || d < 0 || d >= 8) {
|
|
print_line:
|
|
iptr_new = s1->include_stack_ptr;
|
|
s = iptr_new > iptr ? " 1"
|
|
: iptr_new < iptr ? " 2"
|
|
: iptr_new > s1->include_stack ? " 3"
|
|
: ""
|
|
;
|
|
iptr = iptr_new;
|
|
fprintf(s1->outfile, "# %d \"%s\"%s\n", file->line_num, file->filename, s);
|
|
} else {
|
|
while (d)
|
|
fputs("\n", s1->outfile), --d;
|
|
}
|
|
line_ref = (file_ref = file)->line_num;
|
|
token_seen = tok != TOK_LINEFEED;
|
|
if (!token_seen)
|
|
continue;
|
|
}
|
|
fputs(get_tok_str(tok, &tokc), s1->outfile);
|
|
}
|
|
free_defines(define_start);
|
|
return 0;
|
|
}
|
|
|