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implement 'm' modifier for wide scanf variants

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This commit is contained in:
Rich Felker 2013-06-06 00:26:17 -04:00
parent 16a1e0365d
commit e039db27c2
1 changed files with 40 additions and 7 deletions
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47
src/stdio/vfwscanf.c
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@ -103,6 +103,7 @@ int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
static const char size_pfx[][3] = { "hh", "h", "", "l", "L", "ll" };
char tmp[3*sizeof(int)+10];
const wchar_t *set;
size_t i, k;
FLOCK(f);
@ -140,7 +141,7 @@ int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
}
if (*p=='m') {
alloc = 1;
alloc = !!dest;
p++;
} else {
alloc = 0;
@ -233,16 +234,39 @@ int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
if (width < 1) width = -1;
i = 0;
if (alloc) {
k = t=='c' ? width+1U : 31;
if (size == SIZE_l) {
wcs = malloc(k*sizeof(wchar_t));
if (!wcs) goto alloc_fail;
} else {
s = malloc(k);
if (!s) goto alloc_fail;
}
}
while (width) {
if ((c=getwc(f))<0) break;
if (in_set(set, c) == invert)
break;
if (wcs) {
*wcs++ = c;
wcs[i++] = c;
if (alloc && i==k) {
k += k+1;
wchar_t *tmp = realloc(wcs, k*sizeof(wchar_t));
if (!tmp) goto alloc_fail;
wcs = tmp;
}
} else if (size != SIZE_l) {
int l = wctomb(s?s:tmp, c);
int l = wctomb(s?s+i:tmp, c);
if (l<0) goto input_fail;
if (s) s+=l;
i += l;
if (alloc && i > k-4) {
k += k+1;
char *tmp = realloc(s, k);
if (!tmp) goto alloc_fail;
s = tmp;
}
}
pos++;
width-=(width>0);
@ -253,8 +277,12 @@ int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
if (t == 'c' || !gotmatch) goto match_fail;
}
if (wcs) *wcs++ = 0;
if (s) *s++ = 0;
if (alloc) {
if (size == SIZE_l) *(wchar_t **)dest = wcs;
else *(char **)dest = s;
}
if (wcs) wcs[i] = 0;
if (s) s[i] = 0;
break;
case 'd': case 'i': case 'o': case 'u': case 'x':
@ -279,10 +307,15 @@ int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
}
if (0) {
fmt_fail:
alloc_fail:
input_fail:
if (!matches) matches--;
}
match_fail:
if (alloc) {
free(s);
free(wcs);
}
}
FUNLOCK(f);
return matches;
}