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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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src
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mbsrchr.c
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C/C++ Source or Header
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1998-06-17
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2KB
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75 lines
/***
*mbsrchr.c - Search for last occurence of character (MBCS)
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Search for last occurence of character (MBCS)
*
*******************************************************************************/
#ifdef _MBCS
#include <mtdll.h>
#include <cruntime.h>
#include <string.h>
#include <mbdata.h>
#include <mbctype.h>
#include <mbstring.h>
#include <stddef.h>
/***
* _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 NULL if c not found
*
*Exceptions:
*
*******************************************************************************/
unsigned char * __cdecl _mbsrchr(
const unsigned char *str,
unsigned int c
)
{
char *r = NULL;
unsigned int cc;
if ( _ISNOTMBCP )
return strrchr(str, c);
_mlock(_MB_CP_LOCK);
do {
cc = *str;
if (_ISLEADBYTE(cc)) {
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++);
_munlock(_MB_CP_LOCK);
return(r);
}
#endif /* _MBCS */