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Reactos
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384/****mbsrchr.c - Search for last occurence of character (MBCS)** Copyright (c) Microsoft Corporation. All rights reserved.**Purpose:* Search for last occurence of character (MBCS)*********************************************************************************/#ifndef _MBCS #error This file should only be compiled with _MBCS defined#endif
#include <corecrt_internal_mbstring.h>#include <locale.h>#include <stddef.h>#include <string.h>
#pragma warning(disable:__WARNING_POTENTIAL_BUFFER_OVERFLOW_NULLTERMINATED) // 26018
/**** _mbsrchr - Search for last occurence of character (MBCS)**Purpose:* Find the last occurrence of the specified character in* the supplied string. Handles MBCS chars/strings correctly.**Entry:* unsigned char *str = string to search in* unsigned int c = character to search for**Exit:* returns pointer to last occurrence of c in str* returns nullptr if c not found**Exceptions:* Input parameters are validated. Refer to the validation section of the function.********************************************************************************/
extern "C" _CONST_RETURN unsigned char * __cdecl _mbsrchr_l( const unsigned char *str, unsigned int c, _locale_t plocinfo ){ char *r = nullptr; unsigned int cc; _LocaleUpdate _loc_update(plocinfo);
/* validation section */ _VALIDATE_RETURN(str != nullptr, EINVAL, 0);
if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0) return (_CONST_RETURN unsigned char *)strrchr((const char *)str, c);
do { cc = *str; if ( _ismbblead_l(cc, _loc_update.GetLocaleT()) ) { if(*++str) { if (c == ((cc<<8)|*str)) r = (char *)str - 1; } else if(!r) /* return pointer to '\0' */ r = (char *)str; } else if (c == cc) r = (char *)str; } while (*str++);
return((_CONST_RETURN unsigned char *)r);}
extern "C" _CONST_RETURN unsigned char * (__cdecl _mbsrchr)( const unsigned char *str, unsigned int c ){ return _mbsrchr_l(str, c, nullptr);}