106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
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/***
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*mbscspn.c - Find first string char in charset (MBCS)
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*
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* Copyright (c) 1985-1992, 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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*
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*******************************************************************************/
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#ifdef _MBCS
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#include <cruntime.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 _mbscspn( string, charset )
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const unsigned char *string;
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const unsigned char *charset;
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#else
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unsigned char * _CRTAPI1 _mbspbrk( string, charset )
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const unsigned char *string;
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const unsigned char *charset;
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#endif
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{
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unsigned char *p, *q;
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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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if (_ISLEADBYTE(*p)) {
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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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if (_ISLEADBYTE(*q))
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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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