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[sanitizer_common] Add internal_wcs[n]cpy functions #66529

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Merged
merged 3 commits into from
Sep 15, 2023
Merged

[sanitizer_common] Add internal_wcs[n]cpy functions #66529

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d15f31d
[sanitizer_common] Add internal_wcs[n]cpy functions
strega-nil Sep 15, 2023
5838c08
New line
vitalybuka Sep 15, 2023
3adeae5
no {}
vitalybuka Sep 15, 2023
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16 changes: 16 additions & 0 deletions compiler-rt/lib/sanitizer_common/sanitizer_libc.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,14 @@ char *internal_strncat(char *dst, const char *src, uptr n) {
return dst;
}

wchar_t *internal_wcscpy(wchar_t *dst, const wchar_t *src) {
wchar_t *dst_it = dst;
do {
*dst_it++ = *src++;
} while (*src);
return dst;
}

uptr internal_strlcpy(char *dst, const char *src, uptr maxlen) {
const uptr srclen = internal_strlen(src);
if (srclen < maxlen) {
Expand All @@ -218,6 +226,14 @@ char *internal_strncpy(char *dst, const char *src, uptr n) {
return dst;
}

wchar_t *internal_wcsncpy(wchar_t *dst, const wchar_t *src, uptr n) {
uptr i;
for (i = 0; i < n && src[i]; ++i)
dst[i] = src[i];
internal_memset(dst + i, 0, (n - i) * sizeof(wchar_t));
return dst;
}

uptr internal_strnlen(const char *s, uptr maxlen) {
uptr i = 0;
while (i < maxlen && s[i]) i++;
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3 changes: 2 additions & 1 deletion compiler-rt/lib/sanitizer_common/sanitizer_libc.h
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Expand Up @@ -71,7 +71,8 @@ int internal_snprintf(char *buffer, uptr length, const char *format, ...)
FORMAT(3, 4);
uptr internal_wcslen(const wchar_t *s);
uptr internal_wcsnlen(const wchar_t *s, uptr maxlen);

wchar_t *internal_wcscpy(wchar_t *dst, const wchar_t *src);
wchar_t *internal_wcsncpy(wchar_t *dst, const wchar_t *src, uptr maxlen);
// Return true if all bytes in [mem, mem+size) are zero.
// Optimized for the case when the result is true.
bool mem_is_zero(const char *mem, uptr size);
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