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Added SDL_strnlen() and SDL_wcsnlen()

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This commit is contained in:
Sam Lantinga
2023-07-17 18:10:57 -07:00
parent 4d63c919f9
commit 0a4e6f6d29
8 changed files with 79 additions and 10 deletions
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32
src/stdlib/SDL_string.c
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@@ -390,6 +390,19 @@ size_t SDL_strlen(const char *string)
#endif /* HAVE_STRLEN */
}
size_t SDL_strnlen(const char *string, size_t maxlen)
{
#ifdef HAVE_STRNLEN
return strnlen(string, maxlen);
#else
size_t len = 0;
while (len < maxlen && *string++) {
++len;
}
return len;
#endif /* HAVE_STRNLEN */
}
size_t SDL_wcslen(const wchar_t *string)
{
#ifdef HAVE_WCSLEN
@@ -403,6 +416,19 @@ size_t SDL_wcslen(const wchar_t *string)
#endif /* HAVE_WCSLEN */
}
size_t SDL_wcsnlen(const wchar_t *string, size_t maxlen)
{
#ifdef HAVE_WCSNLEN
return wcsnlen(string, maxlen);
#else
size_t len = 0;
while (len < maxlen && *string++) {
++len;
}
return len;
#endif /* HAVE_WCSNLEN */
}
size_t SDL_wcslcpy(SDL_OUT_Z_CAP(maxlen) wchar_t *dst, const wchar_t *src, size_t maxlen)
{
#ifdef HAVE_WCSLCPY
@@ -702,11 +728,11 @@ char *SDL_strdup(const char *string)
char *SDL_strndup(const char *string, size_t maxlen)
{
size_t len = SDL_min(SDL_strlen(string), maxlen) + 1;
char *newstr = (char *)SDL_malloc(len);
size_t len = SDL_strnlen(string, maxlen);
char *newstr = (char *)SDL_malloc(len + 1);
if (newstr) {
SDL_memcpy(newstr, string, len);
newstr[len - 1] = '\0';
newstr[len] = '\0';
}
return newstr;
}