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/***
*mbsnbcnt.c - Returns byte count of MBCS string
*
* Copyright (c) 1987-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Returns byte count of MBCS string
*
*Revision History:
* 11-19-92 KRS Ported from 16-bit sources.
*
*******************************************************************************/
#ifdef _MBCS
#include <cruntime.h>
#include <mbdata.h>
#include <mbctype.h>
#include <mbstring.h>
/***
* _mbsnbcnt - Returns byte count of MBCS string
*
*Purpose:
* Returns the number of bytes between the start of the supplied
* string and the char count supplied. That is, this routine
* indicates how many bytes are in the first "ccnt" characters
* of the string.
*
*Entry:
* unsigned char *string = pointer to string
* unsigned int ccnt = number of characters to scan
*
*Exit:
* Returns number of bytes between string and ccnt.
*
* If the end of the string is encountered before ccnt chars were
* scanned, then the length of the string in bytes is returned.
*
*Exceptions:
*
*******************************************************************************/
size_t _CRTAPI1 _mbsnbcnt(string, ccnt)
const unsigned char *string;
size_t ccnt;
{
unsigned char *p;
for (p = (char *)string; (ccnt-- && *p); p++) {
if (_ISLEADBYTE(*p)) {
if (*++p == '\0') {
--p;
break;
}
}
}
return ((size_t) ((char *)p - (char *)string));
}
#endif /* _MBCS */
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