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-rw-r--r--src/stdio/vfwscanf.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/src/stdio/vfwscanf.c b/src/stdio/vfwscanf.c
index beb8e8fb..a52ba3a0 100644
--- a/src/stdio/vfwscanf.c
+++ b/src/stdio/vfwscanf.c
@@ -214,13 +214,14 @@ int vfwscanf(FILE *f, const wchar_t *fmt, va_list ap)
break;
case 's':
+ if (width < 1) width = -1;
s = dest;
while (width && !iswspace(c=getwc(f)) && c!=EOF) {
int l = wctomb(s?s:tmp, c);
if (l<0) goto input_fail;
if (s) s+=l;
pos++;
- width--;
+ width-=(width>0);
}
if (width) ungetwc(c, f);
if (s) *s = 0;
@@ -228,8 +229,9 @@ int vfwscanf(FILE *f, const wchar_t *fmt, va_list ap)
case 'S':
wcs = dest;
+ if (width < 1) width = -1;
while (width && !iswspace(c=getwc(f)) && c!=EOF)
- width--, pos++, *wcs++ = c;
+ width-=(width>0), pos++, *wcs++ = c;
if (width) ungetwc(c, f);
if (wcs) *wcs = 0;
break;
@@ -243,6 +245,8 @@ int vfwscanf(FILE *f, const wchar_t *fmt, va_list ap)
int gotmatch = 0;
+ if (width < 1) width = -1;
+
while (width) {
if ((c=getwc(f))<0) break;
if (in_set(p, c) == invert)
@@ -255,7 +259,7 @@ int vfwscanf(FILE *f, const wchar_t *fmt, va_list ap)
if (s) s+=l;
}
pos++;
- width--;
+ width-=(width>0);
gotmatch=1;
}
if (width) ungetwc(c, f);