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fix an overflow in wcsxfrm when n==0

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posix allows zero length destination
This commit is contained in:
Szabolcs Nagy 2014-01-23 03:24:54 +01:00
commit f1471d3216
1 changed files with 4 additions and 2 deletions
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6
src/locale/wcsxfrm.c
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@ -6,10 +6,12 @@
size_t __wcsxfrm_l(wchar_t *restrict dest, const wchar_t *restrict src, size_t n, locale_t loc) size_t __wcsxfrm_l(wchar_t *restrict dest, const wchar_t *restrict src, size_t n, locale_t loc)
{ {
size_t l = wcslen(src); size_t l = wcslen(src);
if (l >= n) { if (l < n) {
wmemcpy(dest, src, l+1);
} else if (n) {
wmemcpy(dest, src, n-1); wmemcpy(dest, src, n-1);
dest[n-1] = 0; dest[n-1] = 0;
} else wcscpy(dest, src); }
return l; return l;
} }