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https://github.com/Chuyu-Team/VC-LTL5.git
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mingkuang
78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
/***
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*mbsnccnt.c - Return char count of MBCS string
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Return char count of MBCS string
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*
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*******************************************************************************/
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#ifndef _MBCS
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#error This file should only be compiled with _MBCS defined
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#endif
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#include <corecrt_internal_mbstring.h>
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#include <locale.h>
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/***
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* _mbsnccnt - Return char count of MBCS string
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*
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*Purpose:
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* Returns the number of chars between the start of the supplied
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* string and the byte count supplied. That is, this routine
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* indicates how many chars are in the first "bcnt" bytes
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* of the string.
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*
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*Entry:
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* const unsigned char *string = pointer to string
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* unsigned int bcnt = number of bytes to scan
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*
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*Exit:
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* Returns number of chars between string and bcnt.
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*
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* If the end of the string is encountered before bcnt chars were
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* scanned, then the length of the string in chars is returned.
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*
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*Exceptions:
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* Input parameters are validated. Refer to the validation section of the function.
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*
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*******************************************************************************/
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#if WindowsTargetPlatformMinVersion < WindowsTargetPlatformWindows6
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extern "C" size_t __cdecl _mbsnccnt_l(
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const unsigned char *string,
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size_t bcnt,
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_locale_t plocinfo
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)
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{
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if (!plocinfo)
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return _mbsnccnt(string, bcnt);
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size_t n;
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//_LocaleUpdate _loc_update(plocinfo);
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_VALIDATE_RETURN(string != nullptr || bcnt == 0, EINVAL, 0);
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for (n = 0; (bcnt-- && *string); n++, string++) {
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if ( _ismbblead_l(*string, plocinfo) ) {
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if ( (!bcnt--) || (*++string == '\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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_LCRT_DEFINE_IAT_SYMBOL(_mbsnccnt_l);
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#endif
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#if 0
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extern "C" size_t (__cdecl _mbsnccnt)(
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const unsigned char *string,
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size_t bcnt
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)
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{
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return _mbsnccnt_l(string, bcnt, nullptr);
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}
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#endif
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