166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
/***
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*mbscspn.c - Find first string char in charset (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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* Find first string char in charset (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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* 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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* 09-14-94 SKS Clean up preprocessor commands inside comments
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* 09-11-97 GJF Replaced __mbcodepage == 0 with _ISNOTMBCP.
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* 04-21-98 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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*ifndef _RETURN_PTR
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* _mbscspn - Find first string char in charset (MBCS)
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*else
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* _mbspbrk - Find first string char in charset, pointer return (MBCS)
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*endif
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*
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*Purpose:
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* Returns maximum leading segment of string
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* which consists solely of characters NOT from charset.
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* Handles MBCS chars correctly.
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*
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*Entry:
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* char *string = string to search in
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* char *charset = set of characters to scan over
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*
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*Exit:
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*
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*ifndef _RETURN_PTR
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* Returns the index of the first char in string
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* that is in the set of characters specified by control.
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*
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* Returns 0, if string begins with a character in charset.
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*else
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* Returns pointer to first character in charset.
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*
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* Returns NULL if string consists entirely of characters
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* not from charset.
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*endif
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*
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*Exceptions:
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*
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*******************************************************************************/
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#ifndef _RETURN_PTR
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size_t __cdecl _mbscspn(
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const unsigned char *string,
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const unsigned char *charset
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)
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#else
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unsigned char * __cdecl _mbspbrk(
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const unsigned char *string,
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const unsigned char *charset
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)
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#endif
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{
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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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#ifndef _RETURN_PTR
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return __mbscspn_mt(ptmbci, string, charset);
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#else
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return __mbspbrk_mt(ptmbci, string, charset);
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#endif
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}
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#ifndef _RETURN_PTR
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size_t __cdecl __mbscspn_mt(
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pthreadmbcinfo ptmbci,
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const unsigned char *string,
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const unsigned char *charset
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)
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#else
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unsigned char * __cdecl __mbspbrk_mt(
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pthreadmbcinfo ptmbci,
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const unsigned char *string,
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const unsigned char *charset
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)
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#endif
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{
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#endif
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unsigned char *p, *q;
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#ifdef _MT
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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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#ifndef _RETURN_PTR
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return strcspn(string, charset);
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#else
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return strpbrk(string, charset);
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#endif
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/* loop through the string to be inspected */
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for (q = (char *)string; *q ; q++) {
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/* loop through the charset */
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for (p = (char *)charset; *p ; p++) {
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#ifdef _MT
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if ( __ismbblead_mt(ptmbci, *p) ) {
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#else
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if ( _ismbblead(*p) ) {
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#endif
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if (((*p == *q) && (p[1] == q[1])) || p[1] == '\0')
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break;
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p++;
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}
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else
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if (*p == *q)
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break;
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}
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if (*p != '\0') /* end of charset? */
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break; /* no, match on this char */
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#ifdef _MT
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if ( __ismbblead_mt(ptmbci, *q) )
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#else
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if ( _ismbblead(*q) )
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#endif
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if (*++q == '\0')
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break;
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}
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#ifndef _RETURN_PTR
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return((size_t) (q - string)); /* index */
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#else
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return((*q) ? q : NULL); /* pointer */
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#endif
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}
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#endif /* _MBCS */
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