105 lines
2.0 KiB
C++
105 lines
2.0 KiB
C++
#include <Windows.h>
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#if defined(_MSC_VER) && _MSC_VER+0 >= 1400
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#if defined(_MSC_FULL_VER) && _MSC_FULL_VER+0 >= 140050727
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#include <intrin.h>
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#else
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EXTERN_C void __stosb(BYTE*,BYTE,size_t);
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#endif
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#pragma intrinsic(__stosb)
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#define CRTINTRINSIC_memset(p,c,s) __stosb((BYTE*)(p),(BYTE)(c),(s))
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#endif
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extern "C" void* __cdecl memset(void *p, int c, size_t z)
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{
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#ifdef CRTINTRINSIC_memset
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CRTINTRINSIC_memset(p, c, z);
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#else
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BYTE *pb = reinterpret_cast<BYTE*>(p);
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for(size_t i=0; i<z; ++i, ++pb)
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(*pb) = c;
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#endif
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return p;
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}
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extern "C" const char* __cdecl strstr(const char *str, const char *target)
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{
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if (!*target) return (char*)str;
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char *p1 = (char*)str, *p2 = (char*)target;
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char *p1Adv = (char*)str;
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while (*++p2)
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p1Adv++;
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while (*p1Adv)
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{
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char *p1Begin = p1;
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p2 = (char*)target;
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while (*p1 && *p2 && *p1 == *p2)
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{
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p1++;
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p2++;
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}
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if (!*p2)
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return p1Begin;
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p1 = p1Begin + 1;
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p1Adv++;
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}
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return NULL;
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}
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extern "C" const wchar_t* __cdecl wcsstr(const wchar_t *str, const wchar_t *target)
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{
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if (!*target) return (wchar_t*)str;
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wchar_t *p1 = (wchar_t*)str, *p2 = (wchar_t*)target;
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wchar_t *p1Adv = (wchar_t*)str;
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while (*++p2)
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p1Adv++;
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while (*p1Adv)
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{
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wchar_t *p1Begin = p1;
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p2 = (wchar_t*)target;
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while (*p1 && *p2 && *p1 == *p2)
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{
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p1++;
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p2++;
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}
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if (!*p2)
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return p1Begin;
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p1 = p1Begin + 1;
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p1Adv++;
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}
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return NULL;
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}
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extern "C" const char* __cdecl strchr(const char* s, int ch)
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{
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while(*s && *s != ch)
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++s;
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return s;
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}
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extern "C" const wchar_t* __cdecl wcschr(const wchar_t* s, wchar_t ch)
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{
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while(*s && *s != ch)
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++s;
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return s;
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}
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extern "C" const char* __cdecl strrchr(const char* s, int c)
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{
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char *rtnval = 0;
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do {
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if (*s == c)
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rtnval = (char*) s;
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} while (*s++);
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return rtnval;
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}
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extern "C" const wchar_t* __cdecl wcsrchr(const wchar_t* s, wchar_t c)
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{
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wchar_t *rtnval = 0;
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do {
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if (*s == c)
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rtnval = (wchar_t*) s;
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} while (*s++);
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return rtnval;
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} |