thirdparty/scummvm
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COMMON: Add sprintf_s and vsprintf_s

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These functions will issue warnings and truncate strings.
It's like snprintf and vsnprintf but noisier.
There are also versions automatically determining size based on the destination
array size.
This raises a compilation error when the size cannot be determined by
the compiler.
This commit is contained in:
Le Philousophe 2022-10-23 15:17:27 +02:00 • committed by Eugene Sandulenko
parent 9c04d72471
commit cd785e2208
2 changed files with 89 additions and 0 deletions
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40
common/str.cpp
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@ -818,6 +818,46 @@ void strcat_s(char *dst, size_t size, const char *src) {
dst[-1] = '\0';
}
int vsprintf_s(char *dst, size_t size, const char *format, va_list ap) {
if (!dst) {
warning("%s: dst is nullptr", __func__);
return 0;
}
if (!size) {
warning("%s: size is zero", __func__);
return 0;
}
if (!format) {
warning("%s: format is nullptr", __func__);
dst[0] = '\0';
return 0;
}
int ret = vsnprintf(dst, size, format, ap);
if ((size_t)ret < size
#if defined(_MSC_VER) && _MSC_VER <= 1800
&& ret != -1
#endif
) {
// Nominal case: no truncation
return ret;
}
warning("%s: truncating string", __func__);
dst[size - 1] = '\0';
return size - 1;
}
int sprintf_s(char *dst, size_t size, const char *format, ...) {
int ret;
va_list ap;
va_start(ap, format);
ret = vsprintf_s(dst, size, format, ap);
va_end(ap);
return ret;
}
size_t strlcpy(char *dst, const char *src, size_t size) {
// Our backup of the source's start, we need this
// to calculate the source's length.