mirror of
https://github.com/Chuyu-Team/VC-LTL5.git
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mingkuang
108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
/***
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*strncoll.c - Collate locale strings
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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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* Compare two strings using the locale LC_COLLATE information.
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* Compares at most n characters of two strings.
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*
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*******************************************************************************/
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#include <corecrt_internal.h>
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#include <ctype.h>
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#include <locale.h>
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#include <string.h>
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/***
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*int _strncoll() - Collate locale strings
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*
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*Purpose:
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* Compare two strings using the locale LC_COLLATE information.
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* Compares at most n characters of two strings.
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*
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*Entry:
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* const char *s1 = pointer to the first string
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* const char *s2 = pointer to the second string
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* size_t count - maximum number of characters to compare
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*
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*Exit:
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* Less than 0 = first string less than second string
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* 0 = strings are equal
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* Greater than 0 = first string greater than second string
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* Returns _NLSCMPERROR is something went wrong
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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" int __cdecl _strncoll_l (
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const char *_string1,
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const char *_string2,
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size_t count,
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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 _strncoll(_string1, _string2, count);
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int ret;
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if ( !count )
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return 0;
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/* validation section */
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_VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR);
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_VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR);
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_VALIDATE_RETURN(count <= INT_MAX, EINVAL, _NLSCMPERROR);
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//_LocaleUpdate _loc_update(plocinfo);
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if ( plocinfo->locinfo->lc_handle[LC_COLLATE] == 0 )
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{
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return strncmp(_string1, _string2, count);
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}
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if ( 0 == (ret = __acrt_CompareStringA(
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plocinfo,
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plocinfo->locinfo->lc_handle[LC_COLLATE],
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SORT_STRINGSORT,
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_string1,
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(int)count,
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_string2,
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(int)count,
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plocinfo->locinfo->lc_collate_cp)) )
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{
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errno = EINVAL;
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return _NLSCMPERROR;
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}
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return (ret - 2);
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}
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_LCRT_DEFINE_IAT_SYMBOL(_strncoll_l);
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#endif
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#if 0
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extern "C" int __cdecl _strncoll (
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const char *_string1,
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const char *_string2,
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size_t count
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)
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{
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if (!__acrt_locale_changed())
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{
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/* validation section */
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_VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR);
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_VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR);
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_VALIDATE_RETURN(count <= INT_MAX, EINVAL, _NLSCMPERROR);
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return strncmp(_string1, _string2, count);
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}
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else
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{
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return _strncoll_l(_string1, _string2, count, nullptr);
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}
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}
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#endif
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