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Vita: restore sceClibMemcmp

This commit is contained in:
Ivan Epifanov 2022-09-17 11:52:19 +03:00 committed by Sam Lantinga
parent 2e9f5b5989
commit 7115ceb775
2 changed files with 17 additions and 1 deletions
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1
CMakeLists.txt
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@ -2495,6 +2495,7 @@ elseif(VITA)
target_compile_definitions(sdl-build-options INTERFACE "-Dmemcpy=sceClibMemcpy")
target_compile_definitions(sdl-build-options INTERFACE "-Dmemset=sceClibMemset")
target_compile_definitions(sdl-build-options INTERFACE "-Dmemmove=sceClibMemmove")
target_compile_definitions(sdl-build-options INTERFACE "-Dmemcmp=sceClibMemcmp")
# CheckPTHREAD()

17
src/stdlib/SDL_string.c
View File

@ -29,6 +29,10 @@
#include "SDL_stdinc.h"
#include "SDL_vacopy.h"
#if defined(__vita__)
#include <psp2/kernel/clib.h>
#endif
#if !defined(HAVE_VSSCANF) || !defined(HAVE_STRTOL) || !defined(HAVE_STRTOUL) || !defined(HAVE_STRTOD) || !defined(HAVE_STRTOLL) || !defined(HAVE_STRTOULL)
#define SDL_isupperhex(X) (((X) >= 'A') && ((X) <= 'F'))
#define SDL_islowerhex(X) (((X) >= 'a') && ((X) <= 'f'))
@ -306,7 +310,18 @@ SDL_memmove(SDL_OUT_BYTECAP(len) void *dst, SDL_IN_BYTECAP(len) const void *src,
int
SDL_memcmp(const void *s1, const void *s2, size_t len)
{
#if defined(HAVE_MEMCMP)
#if defined(__vita__)
/*
Using memcmp on NULL is UB per POSIX / C99 7.21.1/2.
But, both linux and bsd allow that, with an exception:
zero length strings are always identical, so NULLs are never dereferenced.
sceClibMemcmp on PSVita doesn't allow that, so we check ourselves.
*/
if (len == 0) {
return 0;
}
return sceClibMemcmp(s1, s2, len);
#elif defined(HAVE_MEMCMP)
return memcmp(s1, s2, len);
#else
char *s1p = (char *) s1;