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tinycc/tccpp.c
Arthur Williams 8482682061 Define __TCC_BACKTRACE_ENABLED__ if backtrace is enabled 
If the `-btN` was specified, then the __TCC_BACKTRACE_ENABLED__
macro will be defined. This provides a way for user code
to tell if tcc_backtrace is defined or not.
2022-07-23 15:12:15 -07:00

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/*
* 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
*/
#define USING_GLOBALS
#include "tcc.h"
/* #define to 1 to enable (see parse_pp_string()) */
#define ACCEPT_LF_IN_STRINGS 0
/********************************************************/
/* 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 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 CString macro_equal_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 int pp_expr;
static int pp_counter;
static void tok_print(const char *msg, const int *str);
static struct TinyAlloc *toksym_alloc;
static struct TinyAlloc *tokstr_alloc;
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/* outdated -- gr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,
'.','.', TOK_TWODOTS,
'#','#', TOK_TWOSHARPS,
'#','#', TOK_PPJOIN,
0
};
static void next_nomacro(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_INFO 1 /* collect and dump allocators stats */
#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 40
#endif
#define TOKSYM_TAL_SIZE (768 * 1024) /* allocator for tiny TokenSym in table_ident */
#define TOKSTR_TAL_SIZE (768 * 1024) /* allocator for tiny TokenString instances */
#define CSTR_TAL_SIZE (256 * 1024) /* allocator for tiny CString instances */
#define TOKSYM_TAL_LIMIT 256 /* prefer unique limits to distinguish allocators debug msgs */
#define TOKSTR_TAL_LIMIT 128 /* 32 * sizeof(int) */
#define CSTR_TAL_LIMIT 1024
typedef struct TinyAlloc {
unsigned limit;
unsigned size;
uint8_t *buffer;
uint8_t *p;
unsigned nb_allocs;
struct TinyAlloc *next, *top;
#ifdef TAL_INFO
unsigned nb_peak;
unsigned nb_total;
unsigned nb_missed;
uint8_t *peak_p;
#endif
} TinyAlloc;
typedef struct tal_header_t {
unsigned 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;
/* ------------------------------------------------------------------------- */
static TinyAlloc *tal_new(TinyAlloc **pal, unsigned limit, unsigned 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;
}
static 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: memory leak %d chunk(s) (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, "%s:%d: chunk of %d bytes leaked\n",
header->file_name, header->line_num, header->size);
}
p += header->size + sizeof(tal_header_t);
}
#if MEM_DEBUG-0 == 2
exit(2);
#endif
}
#endif
next = al->next;
tcc_free(al->buffer);
tcc_free(al);
al = next;
goto tail_call;
}
static 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, "%s:%d: TAL_DEBUG: double frees chunk from\n",
file, line);
fprintf(stderr, "%s:%d: %d bytes\n",
header->file_name, (int)-header->line_num, (int)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);
}
static void *tal_realloc_impl(TinyAlloc **pal, void *p, unsigned size TAL_DEBUG_PARAMS)
{
tal_header_t *header;
void *ret;
int is_own;
unsigned 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 - al->buffer + adj_size + sizeof(tal_header_t) < 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);
if (p) 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);
if (p) 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);
if (p) 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 = tcc_realloc(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_INLN char *unicode_to_utf8 (char *b, uint32_t Uc)
{
if (Uc<0x80) *b++=Uc;
else if (Uc<0x800) *b++=192+Uc/64, *b++=128+Uc%64;
else if (Uc-0xd800u<0x800) goto error;
else if (Uc<0x10000) *b++=224+Uc/4096, *b++=128+Uc/64%64, *b++=128+Uc%64;
else if (Uc<0x110000) *b++=240+Uc/262144, *b++=128+Uc/4096%64, *b++=128+Uc/64%64, *b++=128+Uc%64;
else error: tcc_error("0x%x is not a valid universal character", Uc);
return b;
}
/* add a unicode character expanded into utf8 */
ST_INLN void cstr_u8cat(CString *cstr, int ch)
{
char buf[4], *e;
e = unicode_to_utf8(buf, (uint32_t)ch);
cstr_cat(cstr, buf, e - buf);
}
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)
{
tcc_free(cstr->data);
cstr_new(cstr);
}
/* reset string to empty */
ST_FUNC void cstr_reset(CString *cstr)
{
cstr->size = 0;
}
ST_FUNC int cstr_vprintf(CString *cstr, const char *fmt, va_list ap)
{
va_list v;
int len, size = 80;
for (;;) {
size += cstr->size;
if (size > cstr->size_allocated)
cstr_realloc(cstr, size);
size = cstr->size_allocated - cstr->size;
va_copy(v, ap);
len = vsnprintf((char*)cstr->data + cstr->size, size, fmt, v);
va_end(v);
if (len > 0 && len < size)
break;
size *= 2;
}
cstr->size += len;
return len;
}
ST_FUNC int cstr_printf(CString *cstr, const char *fmt, ...)
{
va_list ap; int len;
va_start(ap, fmt);
len = cstr_vprintf(cstr, fmt, ap);
va_end(ap);
return len;
}
/* 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;i<len;i++)
h = TOK_HASH_FUNC(h, ((unsigned char *)str)[i]);
h &= (TOK_HASH_SIZE - 1);
pts = &hash_ident[h];
for(;;) {
ts = *pts;
if (!ts)
break;
if (ts->len == len && !memcmp(ts->str, str, len))
return ts;
pts = &(ts->hash_next);
}
return tok_alloc_new(pts, str, len);
}
ST_FUNC int tok_alloc_const(const char *str)
{
return tok_alloc(str, strlen(str))->tok;
}
/* 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_CLONG:
case TOK_CULONG:
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;i<len;i++)
add_char(&cstr_buf, ((unsigned char *)cv->str.data)[i]);
} else {
len = (cv->str.size / sizeof(nwchar_t)) - 1;
for(i=0;i<len;i++)
add_char(&cstr_buf, ((nwchar_t *)cv->str.data)[i]);
}
cstr_ccat(&cstr_buf, '\"');
cstr_ccat(&cstr_buf, '\0');
break;
case TOK_CFLOAT:
cstr_cat(&cstr_buf, "<float>", 0);
break;
case TOK_CDOUBLE:
cstr_cat(&cstr_buf, "<double>", 0);
break;
case TOK_CLDOUBLE:
cstr_cat(&cstr_buf, "<long double>", 0);
break;
case TOK_LINENUM:
cstr_cat(&cstr_buf, "<linenumber>", 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, ">>=");
case TOK_EOF:
return strcpy(p, "<eof>");
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;
case 0: /* nameless anonymous symbol */
*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) */
static 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 >= 0) {
#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 */
static inline 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 */
static 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 */
static 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;
}
ST_FUNC int set_idnum(int c, int val)
{
int prev = isidnum_table[c - CH_EOF];
isidnum_table[c - CH_EOF] = val;
return prev;
}
#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') {
add_lf:
if (ACCEPT_LF_IN_STRINGS) {
file->line_num++;
goto add_char;
} else if (str) { /* not skipping */
goto unterminated_string;
} else {
tcc_warning("missing terminating %c character", sep);
return p;
}
} else if (c == '\r') {
PEEKC_EOB(c, p);
if (c != '\n') {
if (str)
cstr_ccat(str, '\r');
} else {
goto add_lf;
}
} 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;
tok_flags &= ~TOK_FLAG_BOL;
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 - 1);
}
#if !defined(TCC_TARGET_ARM)
else if (parse_flags & PARSE_FLAG_ASM_FILE)
p = parse_line_comment(p - 1);
#else
/* ARM assembly uses '#' for constants */
#endif
break;
_default:
default:
p++;
break;
}
start_of_line = 0;
}
the_end: ;
file->buf_ptr = p;
}
#if 0
/* 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_CLONG:
case TOK_CULONG:
return 1 + LONG_SIZE / 4;
case TOK_CDOUBLE:
case TOK_CLLONG:
case TOK_CULLONG:
return 1 + 2;
case TOK_CLDOUBLE:
return 1 + LDOUBLE_SIZE / 4;
default:
return 1 + 0;
}
}
#endif
/* token string handling */
ST_INLN void tok_str_new(TokenString *s)
{
s->str = NULL;
s->len = s->lastlen = 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_str(int *str)
{
tal_free(tokstr_alloc, str);
}
ST_FUNC void tok_str_free(TokenString *str)
{
tok_str_free_str(str->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;
str->save_line_num = file->line_num;
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;
file->line_num = str->save_line_num;
if (str->alloc != 0) {
if (str->alloc == 2)
str->str = NULL; /* don't free */
tok_str_free(str);
}
}
static void tok_str_add2(TokenString *s, int t, CValue *cv)
{
int len, *str;
len = s->lastlen = 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:
#if LONG_SIZE == 4
case TOK_CLONG:
case TOK_CULONG:
#endif
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 LONG_SIZE == 8
case TOK_CLONG:
case TOK_CULONG:
#endif
#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. */
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++) {
#if LONG_SIZE == 4
case TOK_CLONG:
#endif
case TOK_CINT:
case TOK_CCHAR:
case TOK_LCHAR:
case TOK_LINENUM:
cv->i = *p++;
break;
#if LONG_SIZE == 4
case TOK_CULONG:
#endif
case TOK_CUINT:
cv->i = (unsigned)*p++;
break;
case TOK_CFLOAT:
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:
#if LONG_SIZE == 8
case TOK_CLONG:
case TOK_CULONG:
#endif
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;
}
#if 0
# define TOK_GET(t,p,c) tok_get(t,p,c)
#else
# define TOK_GET(t,p,c) do { \
int _t = **(p); \
if (TOK_HAS_VALUE(_t)) \
tok_get(t, p, c); \
else \
*(t) = _t, ++*(p); \
} while (0)
#endif
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 macro_equal_buf, next time only reset position to start */
cstr_reset(&macro_equal_buf);
TOK_GET(&t, &a, &cv);
cstr_cat(&macro_equal_buf, get_tok_str(t, &cv), 0);
TOK_GET(&t, &b, &cv);
if (strcmp(macro_equal_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_str(top->d);
define_undef(top);
sym_free(top);
}
}
/* 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, int keep)
{
Sym *s, *s1;
for(s = *ptop; s != slast; s = s1) {
s1 = s->prev;
if (s->r == LABEL_DECLARED) {
tcc_warning_c(warn_all)("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 */
if (s->r != LABEL_GONE)
table_ident[s->v - TOK_IDENT]->sym_label = s->prev_tok;
if (!keep)
sym_free(s);
else
s->r = LABEL_GONE;
}
if (!keep)
*ptop = slast;
}
/* fake the nth "#if defined test_..." for tcc -dt -run */
static void maybe_run_test(TCCState *s)
{
const char *p;
if (s->include_stack_ptr != s->include_stack)
return;
p = get_tok_str(tok, NULL);
if (0 != memcmp(p, "test_", 5))
return;
if (0 != --s->run_test)
return;
fprintf(s->ppfp, &"\n[%s]\n"[!(s->dflag & 32)], p), fflush(s->ppfp);
define_push(tok, MACRO_OBJ, NULL, NULL);
}
/* eval an expression for #if/#elif */
static int expr_preprocess(void)
{
int c, t;
TokenString *str;
str = tok_str_alloc();
pp_expr = 1;
while (tok != TOK_LINEFEED && tok != TOK_EOF) {
next(); /* do macro subst */
redo:
if (tok == TOK_DEFINED) {
next_nomacro();
t = tok;
if (t == '(')
next_nomacro();
if (tok < TOK_IDENT)
expect("identifier");
if (tcc_state->run_test)
maybe_run_test(tcc_state);
c = define_find(tok) != 0;
if (t == '(') {
next_nomacro();
if (tok != ')')
expect("')'");
}
tok = TOK_CINT;
tokc.i = c;
} else if (1 && tok == TOK___HAS_INCLUDE) {
next(); /* XXX check if correct to use expansion */
skip('(');
while (tok != ')' && tok != TOK_EOF)
next();
if (tok != ')')
expect("')'");
tok = TOK_CINT;
tokc.i = 0;
} else if (tok >= TOK_IDENT) {
/* if undefined macro, replace with zero, check for func-like */
t = tok;
tok = TOK_CINT;
tokc.i = 0;
tok_str_add_tok(str);
next();
if (tok == '(')
tcc_error("function-like macro '%s' is not defined",
get_tok_str(t, NULL));
goto redo;
}
tok_str_add_tok(str);
}
pp_expr = 0;
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 || v == TOK_DEFINED)
tcc_error("invalid macro name '%s'", get_tok_str(tok, &tokc));
/* XXX: should check if same macro (ANSI) */
first = NULL;
t = MACRO_OBJ;
/* We have to parse the whole define as if not in asm mode, in particular
no line comment with '#' must be ignored. Also for function
macros the argument list must be parsed without '.' being an ID
character. */
parse_flags = ((parse_flags & ~PARSE_FLAG_ASM_FILE) | PARSE_FLAG_SPACES);
/* '(' must be just after macro definition for MACRO_FUNC */
next_nomacro();
parse_flags &= ~PARSE_FLAG_SPACES;
if (tok == '(') {
int dotid = set_idnum('.', 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();
}
parse_flags |= PARSE_FLAG_SPACES;
next_nomacro();
t = MACRO_FUNC;
set_idnum('.', dotid);
}
tokstr_buf.len = 0;
spc = 2;
parse_flags |= PARSE_FLAG_ACCEPT_STRAYS | PARSE_FLAG_SPACES | PARSE_FLAG_LINEFEED;
/* The body of a macro definition should be parsed such that identifiers
are parsed like the file mode determines (i.e. with '.' being an
ID character in asm mode). But '#' should be retained instead of
regarded as line comment leader, so still don't set ASM_FILE
in parse_flags. */
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;
tok = TOK_PPJOIN;
} else if ('#' == tok) {
spc = 4;
} else if (check_space(tok, &spc)) {
goto skip;
}
tok_str_add2(&tokstr_buf, tok, &tokc);
skip:
next_nomacro();
}
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(&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->output_type == TCC_OUTPUT_PREPROCESS) {
/* 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) // push current
#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;
val = *s1->pack_stack_ptr++;
if (tok != ',')
goto pack_set;
next();
}
if (tok != TOK_CINT)
goto pragma_err;
val = tokc.i;
if (val < 1 || val > 16 || (val & (val - 1)) != 0)
goto pragma_err;
next();
}
pack_set:
*s1->pack_stack_ptr = val;
}
if (tok != ')')
goto pragma_err;
} else if (tok == TOK_comment) {
char *p; int t;
next();
skip('(');
t = tok;
next();
skip(',');
if (tok != TOK_STR)
goto pragma_err;
p = tcc_strdup((char *)tokc.str.data);
next();
if (tok != ')')
goto pragma_err;
if (t == TOK_lib) {
dynarray_add(&s1->pragma_libs, &s1->nb_pragma_libs, p);
} else {
if (t == TOK_option)
tcc_set_options(s1, p);
tcc_free(p);
}
} else
tcc_warning_c(warn_unsupported)("#pragma %s 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 {
int len;
/* computed #include : concatenate everything up to linefeed,
the result must be one of the two accepted forms.
Don't convert pp-tokens to tokens here. */
parse_flags = (PARSE_FLAG_PREPROCESS
| PARSE_FLAG_LINEFEED
| (parse_flags & PARSE_FLAG_ASM_FILE));
next();
buf[0] = '\0';
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] != '"') &&
(buf[0] != '<' || buf[len-1] != '>'))))
tcc_error("'#include' expects \"FILENAME\" or <FILENAME>");
c = buf[len-1];
memmove(buf, buf + 1, len - 2);
buf[len - 2] = '\0';
}
if (s1->include_stack_ptr >= s1->include_stack + INCLUDE_STACK_SIZE)
tcc_error("#include recursion too deep");
i = tok == TOK_INCLUDE_NEXT ? file->include_next_index + 1 : 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 file's dir if "header.h" */
if (c != '\"')
continue;
/* https://savannah.nongnu.org/bugs/index.php?50847 */
path = file->true_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];
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;
/* push previous file on stack */
*s1->include_stack_ptr++ = file->prev;
file->include_next_index = i;
#ifdef INC_DEBUG
printf("%s: including %s\n", file->prev->filename, file->filename);
#endif
/* update target deps */
if (s1->gen_deps) {
BufferedFile *bf = file;
while (i == 1 && (bf = bf->prev))
i = bf->include_next_index;
/* skip system include files */
if (s1->include_sys_deps || n - i > s1->nb_sysinclude_paths)
dynarray_add(&s1->target_deps, &s1->nb_target_deps,
tcc_strdup(buf1));
}
/* add include file debug info */
tcc_debug_bincl(tcc_state);
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) {
c = 0;
} else {
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)) {
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) {
if (file->true_filename == file->filename)
file->true_filename = tcc_strdup(file->filename);
q = (char *)tokc.str.data;
buf[0] = 0;
if (!IS_ABSPATH(q)) {
/* prepend directory from real file */
pstrcpy(buf, sizeof buf, file->true_filename);
*tcc_basename(buf) = 0;
}
pstrcat(buf, sizeof buf, q);
tcc_debug_putfile(s1, buf);
} 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;
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 - 1);
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, i;
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': i = 0; goto parse_hex_or_ucn;
case 'u': i = 4; goto parse_hex_or_ucn;
case 'U': i = 8; goto parse_hex_or_ucn;
parse_hex_or_ucn:
p++;
n = 0;
do {
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 if (i > 0)
expect("more hex digits in universal-character-name");
else {
c = n;
goto add_char_nonext;
}
n = n * 16 + c;
p++;
} while (--i);
cstr_u8cat(outstr, n);
continue;
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;
}
} else if (is_long && c >= 0x80) {
/* assume we are processing UTF-8 sequence */
/* reference: The Unicode Standard, Version 10.0, ch3.9 */
int cont; /* count of continuation bytes */
int skip; /* how many bytes should skip when error occurred */
int i;
/* decode leading byte */
if (c < 0xC2) {
skip = 1; goto invalid_utf8_sequence;
} else if (c <= 0xDF) {
cont = 1; n = c & 0x1f;
} else if (c <= 0xEF) {
cont = 2; n = c & 0xf;
} else if (c <= 0xF4) {
cont = 3; n = c & 0x7;
} else {
skip = 1; goto invalid_utf8_sequence;
}
/* decode continuation bytes */
for (i = 1; i <= cont; i++) {
int l = 0x80, h = 0xBF;
/* adjust limit for second byte */
if (i == 1) {
switch (c) {
case 0xE0: l = 0xA0; break;
case 0xED: h = 0x9F; break;
case 0xF0: l = 0x90; break;
case 0xF4: h = 0x8F; break;
}
}
if (p[i] < l || p[i] > h) {
skip = i; goto invalid_utf8_sequence;
}
n = (n << 6) | (p[i] & 0x3f);
}
/* advance pointer */
p += 1 + cont;
c = n;
goto add_char_nonext;
/* error handling */
invalid_utf8_sequence:
tcc_warning("ill-formed UTF-8 subsequence starting with: \'\\x%x\'", c);
c = 0xFFFD;
p += skip;
goto add_char_nonext;
}
p++;
add_char_nonext:
if (!is_long)
cstr_ccat(outstr, c);
else {
#ifdef TCC_TARGET_PE
/* store as UTF-16 */
if (c < 0x10000) {
cstr_wccat(outstr, c);
} else {
c -= 0x10000;
cstr_wccat(outstr, (c >> 10) + 0xD800);
cstr_wccat(outstr, (c & 0x3FF) + 0xDC00);
}
#else
cstr_wccat(outstr, c);
#endif
}
}
/* 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, i, n, c;
/* XXX: make it portable */
if (!is_long)
tok = TOK_CCHAR, char_size = 1;
else
tok = TOK_LCHAR, char_size = sizeof(nwchar_t);
n = tokcstr.size / char_size - 1;
if (n < 1)
tcc_error("empty character constant");
if (n > 1)
tcc_warning_c(warn_all)("multi-character character constant");
for (c = i = 0; i < n; ++i) {
if (is_long)
c = ((nwchar_t *)tokcstr.data)[i];
else
c = (c << 8) | ((char *)tokcstr.data)[i];
}
tokc.i = c;
} 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<BN_SIZE;i++) {
v = bn[i];
bn[i] = (v << shift) | or_val;
or_val = v >> (32 - shift);
}
}
static 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 */
static 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_state->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:
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_USING_DOUBLE_FOR_LDOUBLE
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_USING_DOUBLE_FOR_LDOUBLE
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, ov = 0;
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 */
if (n1 >= 0x1000000000000000ULL && n / b != n1)
ov = 1;
}
/* Determine the characteristics (unsigned and/or 64bit) the type of
the constant must have according to the constant suffix(es) */
lcount = ucount = 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++;
ch = *p++;
} else if (t == 'U') {
if (ucount >= 1)
tcc_error("two 'u's in integer constant");
ucount++;
ch = *p++;
} else {
break;
}
}
/* Determine if it needs 64 bits and/or unsigned in order to fit */
if (ucount == 0 && b == 10) {
if (lcount <= (LONG_SIZE == 4)) {
if (n >= 0x80000000U)
lcount = (LONG_SIZE == 4) + 1;
}
if (n >= 0x8000000000000000ULL)
ov = 1, ucount = 1;
} else {
if (lcount <= (LONG_SIZE == 4)) {
if (n >= 0x100000000ULL)
lcount = (LONG_SIZE == 4) + 1;
else if (n >= 0x80000000U)
ucount = 1;
}
if (n >= 0x8000000000000000ULL)
ucount = 1;
}
if (ov)
tcc_warning("integer constant overflow");
tok = TOK_CINT;
if (lcount) {
tok = TOK_CLONG;
if (lcount == 2)
tok = TOK_CLLONG;
}
if (ucount)
++tok; /* TOK_CU... */
tokc.i = n;
}
if (ch)
tcc_error("invalid number");
}
#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++;
maybe_space:
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 */
tcc_debug_eincl(tcc_state);
/* pop include stack */
tcc_close();
s1->include_stack_ptr--;
p = file->buf_ptr;
if (p == file->buffer)
tok_flags = TOK_FLAG_BOF|TOK_FLAG_BOL;
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 !defined(TCC_TARGET_ARM)
if (parse_flags & PARSE_FLAG_ASM_FILE) {
p = parse_line_comment(p - 1);
goto redo_no_start;
} else
#endif
{
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, (char *) 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':
t = c;
PEEKC(c, p);
/* after the first digit, accept digits, alpha, '.' or sign if
prefixed by 'eEpP' */
parse_num:
cstr_reset(&tokcstr);
for(;;) {
cstr_ccat(&tokcstr, t);
if (!((isidnum_table[c - CH_EOF] & (IS_ID|IS_NUM))
|| c == '.'
|| ((c == '+' || c == '-')
&& (((t == 'e' || t == 'E')
&& !(parse_flags & PARSE_FLAG_ASM_FILE
/* 0xe+1 is 3 tokens in asm */
&& ((char*)tokcstr.data)[0] == '0'
&& toup(((char*)tokcstr.data)[1]) == 'X'))
|| t == 'p' || t == 'P'))))
break;
t = c;
PEEKC(c, p);
}
/* 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)) {
t = '.';
goto parse_num;
} else if ((isidnum_table['.' - CH_EOF] & IS_ID)
&& (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 maybe_space;
} else if (c == '/') {
p = parse_line_comment(p);
tok = ' ';
goto maybe_space;
} 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 = %d %s\n", tok, get_tok_str(tok, &tokc));
#endif
}
static void macro_subst(
TokenString *tok_str,
Sym **nested_list,
const int *macro_str
);
/* 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, &macro_str, &cval);
if (!t)
break;
if (t == '#') {
/* stringize */
TOK_GET(&t, &macro_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 >= 0) {
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_PPJOIN || t1 == TOK_PPJOIN) {
/* special case for var arg macros : ## eats the ','
if empty VA_ARGS variable. */
if (t1 == TOK_PPJOIN && t0 == ',' && gnu_ext && s->type.t) {
if (*st <= 0) {
/* suppress ',' '##' */
str.len -= 2;
} else {
/* suppress '##' and add variable */
str.len--;
goto add_var;
}
}
} else {
add_var:
if (!s->next) {
/* Expand arguments tokens and store them. In most
cases we could also re-expand each argument if
used multiple times, but not if the argument
contains the __COUNTER__ macro. */
TokenString str2;
sym_push2(&s->next, s->v, s->type.t, 0);
tok_str_new(&str2);
macro_subst(&str2, nested_list, st);
tok_str_add(&str2, 0);
s->next->d = str2.str;
}
st = s->next->d;
}
for(;;) {
int t2;
TOK_GET(&t2, &st, &cval);
if (t2 <= 0)
break;
tok_str_add2(&str, t2, &cval);
}
if (str.len == l0) /* expanded 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"
};
static int paste_tokens(int t1, CValue *v1, int t2, CValue *v2)
{
CString cstr;
int n, ret = 1;
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);
tok_flags = 0;
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, (char *)cstr.data, (char*)cstr.data + n);
ret = 0;
break;
}
tcc_close();
//printf("paste <%s>\n", (char*)cstr.data);
cstr_free(&cstr);
return ret;
}
/* 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_PPJOIN)
break;
if (t == 0)
return NULL;
}
tok_str_new(&macro_str1);
//tok_print(" $$$", ptr0);
for (ptr = ptr0;;) {
TOK_GET(&t, &ptr, &cval);
if (t == 0)
break;
if (t == TOK_PPJOIN)
continue;
while (*ptr == TOK_PPJOIN) {
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_PPJOIN) {
TOK_GET(&t1, &ptr, &cv1);
if (t != TOK_PLCHLDR || t1 != TOK_PLCHLDR) {
if (paste_tokens(t, &cval, t1, &cv1)) {
t = tok, cval = tokc;
} else {
tok_str_add2(&macro_str1, t, &cval);
t = t1, cval = cv1;
}
}
}
}
if (t == TOK_NOSUBST) {
if (start_of_nosubsts < 0)
start_of_nosubsts = macro_str1.len;
} else {
start_of_nosubsts = -1;
}
tok_str_add2(&macro_str1, t, &cval);
}
tok_str_add(&macro_str1, 0);
//tok_print(" ###", macro_str1.str);
return macro_str1.str;
}
/* 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, 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_PLCHLDR == t)
tok_str_add(ws_str, t), t = *++p;
}
if (t == 0) {
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 = ' ';
}
if (ch == '\n')
file->line_num++;
if (!(ch == '\f' || ch == '\v' || ch == '\r'))
tok_str_add(ws_str, ch);
cinp();
}
}
t = ch;
}
if (ws_str)
return t;
next_nomacro();
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)
{
Sym *args, *sa, *sa1;
int parlevel, 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__ || tok == TOK___COUNTER__) {
t = tok == TOK___LINE__ ? file->line_num : pp_counter++;
snprintf(buf, sizeof(buf), "%d", t);
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 if (s->d) {
int saved_parse_flags = parse_flags;
int *joined_str = NULL;
int *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, &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_str(ws_str.str);
return 0;
} else {
tok_str_free_str(ws_str.str);
}
do {
next_nomacro(); /* eat '(' */
} while (tok == TOK_PLCHLDR || is_space(tok));
/* argument macro */
args = NULL;
sa = s->next;
/* NOTE: empty args are allowed, except if no args */
for(;;) {
do {
next_argstream(nested_list, NULL);
} while (tok == TOK_PLCHLDR || 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, NULL);
}
if (parlevel)
expect(")");
str.len -= spc;
tok_str_add(&str, -1);
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));
}
/* now subst each arg */
mstr = macro_arg_subst(nested_list, mstr, args);
/* free memory */
sa = args;
while (sa) {
sa1 = sa->prev;
tok_str_free_str(sa->d);
if (sa->next) {
tok_str_free_str(sa->next->d);
sym_free(sa->next);
}
sym_free(sa);
sa = sa1;
}
parse_flags = saved_parse_flags;
}
sym_push2(nested_list, s->v, 0, 0);
parse_flags = saved_parse_flags;
joined_str = macro_twosharps(mstr);
macro_subst(tok_str, nested_list, joined_str ? joined_str : mstr);
/* pop nested defined symbol */
sa1 = *nested_list;
*nested_list = sa1->prev;
sym_free(sa1);
if (joined_str)
tok_str_free_str(joined_str);
if (mstr != s->d)
tok_str_free_str(mstr);
}
return 0;
}
/* 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
)
{
Sym *s;
int t, spc, nosubst;
CValue cval;
spc = nosubst = 0;
while (1) {
TOK_GET(&t, &macro_str, &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 = tok_str_alloc();
str->str = (int*)macro_str;
begin_macro(str, 2);
tok = t;
macro_subst_tok(tok_str, nested_list, s);
if (macro_stack != str) {
/* already finished by reading function macro arguments */
break;
}
macro_str = macro_ptr;
end_macro ();
}
if (tok_str->len)
spc = is_space(t = tok_str->str[tok_str->lastlen]);
} else {
no_subst:
if (!check_space(t, &spc))
tok_str_add2(tok_str, t, &cval);
if (nosubst) {
if (nosubst > 1 && (spc || (++nosubst == 3 && t == '(')))
continue;
nosubst = 0;
}
if (t == TOK_NOSUBST)
nosubst = 1;
}
/* GCC supports 'defined' as result of a macro substitution */
if (t == TOK_DEFINED && pp_expr)
nosubst = 2;
}
}
/* return next token without macro substitution. Can read input from
macro_ptr buffer */
static void next_nomacro(void)
{
int t;
if (macro_ptr) {
redo:
t = *macro_ptr;
if (TOK_HAS_VALUE(t)) {
tok_get(&tok, &macro_ptr, &tokc);
if (t == TOK_LINENUM) {
file->line_num = tokc.i;
goto redo;
}
} else {
macro_ptr++;
if (t < TOK_IDENT) {
if (!(parse_flags & PARSE_FLAG_SPACES)
&& (isidnum_table[t - CH_EOF] & IS_SPC))
goto redo;
}
tok = t;
}
} else {
next_nomacro1();
}
}
/* return next token with macro substitution */
ST_FUNC void next(void)
{
int t;
redo:
next_nomacro();
t = tok;
if (macro_ptr) {
if (!TOK_HAS_VALUE(t)) {
if (t == TOK_NOSUBST || t == TOK_PLCHLDR) {
/* discard preprocessor markers */
goto redo;
} else if (t == 0) {
/* end of macro or unget token string */
end_macro();
goto redo;
} else if (t == '\\') {
if (!(parse_flags & PARSE_FLAG_ACCEPT_STRAYS))
tcc_error("stray '\\' in program");
}
return;
}
} else if (t >= TOK_IDENT && (parse_flags & PARSE_FLAG_PREPROCESS)) {
/* if reading from file, try to substitute macros */
Sym *s = define_find(t);
if (s) {
Sym *nested_list = NULL;
tokstr_buf.len = 0;
macro_subst_tok(&tokstr_buf, &nested_list, s);
tok_str_add(&tokstr_buf, 0);
begin_macro(&tokstr_buf, 0);
goto redo;
}
return;
}
/* convert preprocessor tokens into C tokens */
if (t == TOK_PPNUM) {
if (parse_flags & PARSE_FLAG_TOK_NUM)
parse_number((char *)tokc.str.data);
} else if (t == 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;
}
/* ------------------------------------------------------------------------- */
/* init preprocessor */
static const char * const target_os_defs =
#ifdef TCC_TARGET_PE
"_WIN32\0"
# if PTR_SIZE == 8
"_WIN64\0"
# endif
#else
# if defined TCC_TARGET_MACHO
"__APPLE__\0"
# elif TARGETOS_FreeBSD
"__FreeBSD__ 12\0"
# elif TARGETOS_FreeBSD_kernel
"__FreeBSD_kernel__\0"
# elif TARGETOS_NetBSD
"__NetBSD__\0"
# elif TARGETOS_OpenBSD
"__OpenBSD__\0"
# else
"__linux__\0"
"__linux\0"
# endif
"__unix__\0"
"__unix\0"
#endif
;
static void putdef(CString *cs, const char *p)
{
cstr_printf(cs, "#define %s%s\n", p, &" 1"[!!strchr(p, ' ')*2]);
}
static void tcc_predefs(TCCState *s1, CString *cs, int is_asm)
{
int a, b, c;
const char *defs[] = { target_machine_defs, target_os_defs, NULL };
const char *p;
sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
cstr_printf(cs, "#define __TINYC__ %d\n", a*10000 + b*100 + c);
for (a = 0; defs[a]; ++a)
for (p = defs[a]; *p; p = strchr(p, 0) + 1)
putdef(cs, p);
#ifdef TCC_TARGET_ARM
if (s1->float_abi == ARM_HARD_FLOAT)
putdef(cs, "__ARM_PCS_VFP");
#endif
if (is_asm)
putdef(cs, "__ASSEMBLER__");
if (s1->output_type == TCC_OUTPUT_PREPROCESS)
putdef(cs, "__TCC_PP__");
if (s1->output_type == TCC_OUTPUT_MEMORY)
putdef(cs, "__TCC_RUN__");
if (s1->char_is_unsigned)
putdef(cs, "__CHAR_UNSIGNED__");
if (s1->optimize > 0)
putdef(cs, "__OPTIMIZE__");
if (s1->option_pthread)
putdef(cs, "_REENTRANT");
if (s1->leading_underscore)
putdef(cs, "__leading_underscore");
#ifdef CONFIG_TCC_BCHECK
if (s1->do_bounds_check)
putdef(cs, "__BOUNDS_CHECKING_ON");
#endif
#ifdef CONFIG_TCC_BACKTRACE
if (s1->do_backtrace)
putdef(cs, "__TCC_BACKTRACE_ENABLED__");
#endif
cstr_printf(cs, "#define __SIZEOF_POINTER__ %d\n", PTR_SIZE);
cstr_printf(cs, "#define __SIZEOF_LONG__ %d\n", LONG_SIZE);
if (!is_asm) {
putdef(cs, "__STDC__");
cstr_printf(cs, "#define __STDC_VERSION__ %dL\n", s1->cversion);
cstr_cat(cs,
/* load more predefs and __builtins */
#if CONFIG_TCC_PREDEFS
#include "tccdefs_.h" /* include as strings */
#else
"#include <tccdefs.h>\n" /* load at runtime */
#endif
, -1);
}
cstr_printf(cs, "#define __BASE_FILE__ \"%s\"\n", file->filename);
}
ST_FUNC void preprocess_start(TCCState *s1, int filetype)
{
int is_asm = !!(filetype & (AFF_TYPE_ASM|AFF_TYPE_ASMPP));
CString cstr;
tccpp_new(s1);
s1->include_stack_ptr = s1->include_stack;
s1->ifdef_stack_ptr = s1->ifdef_stack;
file->ifdef_stack_ptr = s1->ifdef_stack_ptr;
pp_expr = 0;
pp_counter = 0;
pp_debug_tok = pp_debug_symv = 0;
pp_once++;
s1->pack_stack[0] = 0;
s1->pack_stack_ptr = s1->pack_stack;
set_idnum('$', !is_asm && s1->dollars_in_identifiers ? IS_ID : 0);
set_idnum('.', is_asm ? IS_ID : 0);
if (!(filetype & AFF_TYPE_ASM)) {
cstr_new(&cstr);
tcc_predefs(s1, &cstr, is_asm);
if (s1->cmdline_defs.size)
cstr_cat(&cstr, s1->cmdline_defs.data, s1->cmdline_defs.size);
if (s1->cmdline_incl.size)
cstr_cat(&cstr, s1->cmdline_incl.data, s1->cmdline_incl.size);
//printf("%s\n", (char*)cstr.data);
*s1->include_stack_ptr++ = file;
tcc_open_bf(s1, "<command line>", cstr.size);
memcpy(file->buffer, cstr.data, cstr.size);
cstr_free(&cstr);
}
parse_flags = is_asm ? PARSE_FLAG_ASM_FILE : 0;
tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
}
/* cleanup from error/setjmp */
ST_FUNC void preprocess_end(TCCState *s1)
{
while (macro_stack)
end_macro();
macro_ptr = NULL;
while (file)
tcc_close();
tccpp_delete(s1);
}
ST_FUNC void tccpp_new(TCCState *s)
{
int i, c;
const char *p, *r;
/* init isid table */
for(i = CH_EOF; i<128; i++)
set_idnum(i,
is_space(i) ? IS_SPC
: isid(i) ? IS_ID
: isnum(i) ? IS_NUM
: 0);
for(i = 128; i<256; i++)
set_idnum(i, IS_ID);
/* init allocators */
tal_new(&toksym_alloc, TOKSYM_TAL_LIMIT, TOKSYM_TAL_SIZE);
tal_new(&tokstr_alloc, TOKSTR_TAL_LIMIT, TOKSTR_TAL_SIZE);
memset(hash_ident, 0, TOK_HASH_SIZE * sizeof(TokenSym *));
memset(s->cached_includes_hash, 0, sizeof s->cached_includes_hash);
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;
}
/* we add dummy defines for some special macros to speed up tests
and to have working defined() */
define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
define_push(TOK___COUNTER__, MACRO_OBJ, NULL, NULL);
}
ST_FUNC void tccpp_delete(TCCState *s)
{
int i, n;
dynarray_reset(&s->cached_includes, &s->nb_cached_includes);
/* free tokens */
n = tok_ident - TOK_IDENT;
if (n > total_idents)
total_idents = n;
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);
cstr_free(&macro_equal_buf);
tok_str_free_str(tokstr_buf.str);
/* free allocators */
tal_delete(toksym_alloc);
toksym_alloc = NULL;
tal_delete(tokstr_alloc);
tokstr_alloc = NULL;
}
/* ------------------------------------------------------------------------- */
/* tcc -E [-P[1]] [-dD} support */
static void tok_print(const char *msg, const int *str)
{
FILE *fp;
int t, s = 0;
CValue cval;
fp = tcc_state->ppfp;
fprintf(fp, "%s", msg);
while (str) {
TOK_GET(&t, &str, &cval);
if (!t)
break;
fprintf(fp, &" %s"[s], get_tok_str(t, &cval)), s = 1;
}
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) {
;
} else if (level == 0 && f->line_ref && d < 8) {
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);
}
/* Add a space between tokens a and b to avoid unwanted textual pasting */
static int pp_need_space(int a, int b)
{
return 'E' == a ? '+' == b || '-' == b
: '+' == a ? TOK_INC == b || '+' == b
: '-' == a ? TOK_DEC == b || '-' == b
: a >= TOK_IDENT ? b >= TOK_IDENT
: a == TOK_PPNUM ? b >= TOK_IDENT
: 0;
}
/* maybe hex like 0x1e */
static int pp_check_he0xE(int t, const char *p)
{
if (t == TOK_PPNUM && toup(strchr(p, 0)[-1]) == 'E')
return 'E';
return t;
}
/* Preprocess the current file */
ST_FUNC int tcc_preprocess(TCCState *s1)
{
BufferedFile **iptr;
int token_seen, spcs, level;
const char *p;
char white[400];
parse_flags = PARSE_FLAG_PREPROCESS
| (parse_flags & PARSE_FLAG_ASM_FILE)
| PARSE_FLAG_LINEFEED
| PARSE_FLAG_SPACES
| PARSE_FLAG_ACCEPT_STRAYS
;
/* 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 == LINE_MACRO_OUTPUT_FORMAT_P10)
parse_flags |= PARSE_FLAG_TOK_NUM, s1->Pflag = 1;
if (s1->do_bench) {
/* for PP benchmarks */
do next(); while (tok != TOK_EOF);
return 0;
}
if (s1->dflag & 1) {
pp_debug_builtins(s1);
s1->dflag &= ~1;
}
token_seen = TOK_LINEFEED, spcs = 0, level = 0;
if (file->prev)
pp_line(s1, file->prev, level++);
pp_line(s1, file, level);
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 & 7) {
pp_debug_defines(s1);
if (s1->dflag & 4)
continue;
}
if (is_space(tok)) {
if (spcs < sizeof white - 1)
white[spcs++] = tok;
continue;
} else if (tok == TOK_LINEFEED) {
spcs = 0;
if (token_seen == TOK_LINEFEED)
continue;
++file->line_ref;
} else if (token_seen == TOK_LINEFEED) {
pp_line(s1, file, 0);
} else if (spcs == 0 && pp_need_space(token_seen, tok)) {
white[spcs++] = ' ';
}
white[spcs] = 0, fputs(white, s1->ppfp), spcs = 0;
fputs(p = get_tok_str(tok, &tokc), s1->ppfp);
token_seen = pp_check_he0xE(tok, p);
}
return 0;
}
/* ------------------------------------------------------------------------- */
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