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tcc -E: fix pasting empty tokens

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/* test case */
#define t(x,y,z) x ## y ## z
int j[] = { t(1,2,3), t(,4,5), t(6,,7), t(8,9,),
        t(10,,), t(,11,), t(,,12), t(,,) };

tcc -E: xpected result:
int j[] = { 123, 45, 67, 89,
 10, 11, 12, };
This commit is contained in:
grischka 2009-04-17 22:44:42 +02:00
parent 0f0ed4a8bf
commit dd5630ff95
1 changed files with 13 additions and 23 deletions
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34
tcc.c
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@ -4429,45 +4429,38 @@ static int macro_subst_tok(TokenString *tok_str,
static inline int *macro_twosharps(const int *macro_str) static inline int *macro_twosharps(const int *macro_str)
{ {
TokenSym *ts; TokenSym *ts;
const int *macro_ptr1, *start_macro_ptr, *ptr, *saved_macro_ptr; const int *ptr, *saved_macro_ptr;
int t; int t;
const char *p1, *p2; const char *p1, *p2;
CValue cval; CValue cval;
TokenString macro_str1; TokenString macro_str1;
CString cstr; CString cstr;
start_macro_ptr = macro_str;
/* we search the first '##' */ /* we search the first '##' */
for(;;) { for(ptr = macro_str;;) {
macro_ptr1 = macro_str; TOK_GET(t, ptr, cval);
TOK_GET(t, macro_str, cval); if (t == TOK_TWOSHARPS)
break;
/* nothing more to do if end of string */ /* nothing more to do if end of string */
if (t == 0) if (t == 0)
return NULL; return NULL;
if (*macro_str == TOK_TWOSHARPS)
break;
} }
/* we saw '##', so we need more processing to handle it */ /* we saw '##', so we need more processing to handle it */
cstr_new(&cstr); cstr_new(&cstr);
tok_str_new(&macro_str1); tok_str_new(&macro_str1);
tok = t;
tokc = cval;
/* add all tokens seen so far */
for(ptr = start_macro_ptr; ptr < macro_ptr1;) {
TOK_GET(t, ptr, cval);
tok_str_add2(&macro_str1, t, &cval);
}
saved_macro_ptr = macro_ptr; saved_macro_ptr = macro_ptr;
/* XXX: get rid of the use of macro_ptr here */ /* XXX: get rid of the use of macro_ptr here */
macro_ptr = (int *)macro_str; macro_ptr = (int *)macro_str;
for(;;) { for(;;) {
next_nomacro_spc();
if (tok == 0)
break;
if (tok == TOK_TWOSHARPS)
continue;
while (*macro_ptr == TOK_TWOSHARPS) { while (*macro_ptr == TOK_TWOSHARPS) {
macro_ptr++; t = *++macro_ptr;
macro_ptr1 = macro_ptr; if (t && t != TOK_TWOSHARPS) {
t = *macro_ptr;
if (t) {
TOK_GET(t, macro_ptr, cval); TOK_GET(t, macro_ptr, cval);
/* We concatenate the two tokens if we have an /* We concatenate the two tokens if we have an
identifier or a preprocessing number */ identifier or a preprocessing number */
@ -4549,9 +4542,6 @@ static inline int *macro_twosharps(const int *macro_str)
} }
} }
tok_str_add2(&macro_str1, tok, &tokc); tok_str_add2(&macro_str1, tok, &tokc);
next_nomacro();
if (tok == 0)
break;
} }
macro_ptr = (int *)saved_macro_ptr; macro_ptr = (int *)saved_macro_ptr;
cstr_free(&cstr); cstr_free(&cstr);