79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
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/***
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*mbslen.c - Find length of MBCS string
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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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* Find length of MBCS string
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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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* 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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* 04-07-98 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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/***
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* _mbslen - Find length of MBCS string
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*
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*Purpose:
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* Find the length of the MBCS string (in characters).
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*
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*Entry:
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* unsigned char *s = string
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*
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*Exit:
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* Returns the number of MBCS chars in the string
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*
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*Exceptions:
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*
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*******************************************************************************/
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size_t __cdecl _mbslen(
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const unsigned char *s
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)
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{
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int n;
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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 strlen(s);
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for (n = 0; *s; n++, s++) {
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#ifdef _MT
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if ( __ismbblead_mt(ptmbci, *s) ) {
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#else
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if ( _ismbblead(*s) ) {
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#endif
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if (*++s == '\0')
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break;
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}
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}
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return(n);
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}
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#endif /* _MBCS */
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