95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
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/***
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*mbsrchr.c - Search for last occurence of character (MBCS)
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Search for last occurence of character (MBCS)
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*
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*Revision History:
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* 11-19-92 KRS Ported from 16-bit sources.
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* 08-20-93 CFW Change short params to int for 32-bit tree.
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* 10-05-93 GJF Replaced _CRTAPI1 with __cdecl.
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* 04-15-93 CFW Add _MB_CP_LOCK.
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* 05-09-94 CFW Optimize for SBCS.
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* 05-19-94 CFW Enable non-Win32.
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* 09-11-97 GJF Replaced __mbcodepage == 0 with _ISNOTMBCP.
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* 04-17-98 GJF Revised multithread support based on threadmbcinfo
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* structs
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*
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*******************************************************************************/
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#ifdef _MBCS
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#include <mtdll.h>
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#include <cruntime.h>
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#include <string.h>
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#include <mbdata.h>
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#include <mbctype.h>
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#include <mbstring.h>
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#include <stddef.h>
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/***
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* _mbsrchr - Search for last occurence of character (MBCS)
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*
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*Purpose:
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* Find the last occurrence of the specified character in
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* the supplied string. Handles MBCS chars/strings correctly.
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*
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*Entry:
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* unsigned char *str = string to search in
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* unsigned int c = character to search for
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*
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*Exit:
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* returns pointer to last occurrence of c in str
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* returns NULL if c not found
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*
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*Exceptions:
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*
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*******************************************************************************/
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unsigned char * __cdecl _mbsrchr(
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const unsigned char *str,
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unsigned int c
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)
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{
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char *r = NULL;
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unsigned int cc;
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#ifdef _MT
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pthreadmbcinfo ptmbci = _getptd()->ptmbcinfo;
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if ( ptmbci != __ptmbcinfo )
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ptmbci = __updatetmbcinfo();
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if ( _ISNOTMBCP_MT(ptmbci) )
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#else
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if ( _ISNOTMBCP )
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#endif
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return strrchr(str, c);
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do {
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cc = *str;
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#ifdef _MT
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if ( __ismbblead_mt(ptmbci, cc) ) {
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#else
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if ( _ismbblead(cc) ) {
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#endif
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if(*++str) {
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if (c == ((cc<<8)|*str))
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r = (char *)str - 1;
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}
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else if(!r)
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/* return pointer to '\0' */
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r = (char *)str;
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}
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else if (c == cc)
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r = (char *)str;
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}
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while (*str++);
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return(r);
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}
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#endif /* _MBCS */
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