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16a1e03
)
implement 'm' modifier for wide scanf variants
author
Rich Felker
<dalias@aerifal.cx>
Thu, 6 Jun 2013 04:26:17 +0000
(
00:26
-0400)
committer
Rich Felker
<dalias@aerifal.cx>
Thu, 6 Jun 2013 04:26:17 +0000
(
00:26
-0400)
src/stdio/vfwscanf.c
patch
|
blob
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history
diff --git
a/src/stdio/vfwscanf.c
b/src/stdio/vfwscanf.c
index
45de337
..
b1eb793
100644
(file)
--- a/
src/stdio/vfwscanf.c
+++ b/
src/stdio/vfwscanf.c
@@
-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;
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);
FLOCK(f);
@@
-140,7
+141,7
@@
int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
}
if (*p=='m') {
}
if (*p=='m') {
- alloc =
1
;
+ alloc =
!!dest
;
p++;
} else {
alloc = 0;
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;
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) {
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) {
} 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 (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);
}
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 (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':
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:
}
if (0) {
fmt_fail:
+alloc_fail:
input_fail:
if (!matches) matches--;
input_fail:
if (!matches) matches--;
- }
match_fail:
match_fail:
+ if (alloc) {
+ free(s);
+ free(wcs);
+ }
+ }
FUNLOCK(f);
return matches;
}
FUNLOCK(f);
return matches;
}