120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
/***
|
|
*strncoll.c - Collate locale strings
|
|
*
|
|
* Copyright (c) 1994-1995, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* Compare two strings using the locale LC_COLLATE information.
|
|
* Compares at most n characters of two strings.
|
|
*
|
|
*Revision History:
|
|
* 05-09-94 CFW Created from strnicol.c.
|
|
* 05-26-94 CFW If count is zero, return EQUAL.
|
|
* 09-06-94 CFW Remove _INTL switch.
|
|
* 10-24-94 GJF Sped up C locale, multi-thread case.
|
|
* 12-29-94 CFW Merge non-Win32.
|
|
* 09-26-95 GJF New locking macro, and scheme, for functions which
|
|
* reference the locale.
|
|
* 10-30-95 GJF Specify SORT_STRINGSORT to CompareString.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <string.h>
|
|
|
|
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#include <stdlib.h>
|
|
#include <malloc.h>
|
|
#include <locale.h>
|
|
#include <setlocal.h>
|
|
#include <mtdll.h>
|
|
#include <errno.h>
|
|
#include <awint.h>
|
|
#endif /* _WIN32 */
|
|
|
|
/***
|
|
*int _strncoll() - Collate locale strings
|
|
*
|
|
*Purpose:
|
|
* Compare two strings using the locale LC_COLLATE information.
|
|
* Compares at most n characters of two strings.
|
|
*
|
|
*Entry:
|
|
* const char *s1 = pointer to the first string
|
|
* const char *s2 = pointer to the second string
|
|
* size_t count - maximum number of characters to compare
|
|
*
|
|
*Exit:
|
|
* Less than 0 = first string less than second string
|
|
* 0 = strings are equal
|
|
* Greater than 0 = first string greater than second string
|
|
*
|
|
*Exceptions:
|
|
* _NLSCMPERROR = error
|
|
* errno = EINVAL
|
|
*
|
|
*******************************************************************************/
|
|
|
|
int __cdecl _strncoll (
|
|
const char *_string1,
|
|
const char *_string2,
|
|
size_t count
|
|
)
|
|
{
|
|
#if defined(_WIN32) && !defined(_NTSUBSET_)
|
|
|
|
int ret;
|
|
int coll_codepage;
|
|
WCHAR wcstmp[MAX_CP_LEN];
|
|
#if defined(_MT) && !defined(DLL_FOR_WIN32S)
|
|
int local_lock_flag;
|
|
#endif
|
|
|
|
if (!count)
|
|
return 0;
|
|
|
|
if (__lc_handle[LC_COLLATE] == _CLOCALEHANDLE) {
|
|
return strncmp(_string1, _string2, count);
|
|
}
|
|
|
|
_lock_locale( local_lock_flag )
|
|
|
|
#if defined(_MT) && !defined(DLL_FOR_WIN32S)
|
|
if (__lc_handle[LC_COLLATE] == _CLOCALEHANDLE) {
|
|
_unlock_locale( local_lock_flag )
|
|
return strncmp(_string1, _string2, count);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Must use default code page for the LC_COLLATE category for
|
|
* MB/WC conversion inside __crtxxx().
|
|
*/
|
|
|
|
if (__crtGetLocaleInfoW(__lc_handle[LC_COLLATE], LOCALE_IDEFAULTCODEPAGE,
|
|
wcstmp, MAX_CP_LEN, 0) == 0)
|
|
return _NLSCMPERROR;
|
|
|
|
coll_codepage = (int)wcstol(wcstmp, NULL, 10);
|
|
|
|
if (0 == (ret = __crtCompareStringA(__lc_handle[LC_COLLATE],
|
|
SORT_STRINGSORT, _string1, count, _string2, count,
|
|
coll_codepage)))
|
|
goto error_cleanup;
|
|
|
|
_unlock_locale( local_lock_flag )
|
|
return (ret - 2);
|
|
|
|
error_cleanup:
|
|
_unlock_locale( local_lock_flag )
|
|
errno = EINVAL;
|
|
return _NLSCMPERROR;
|
|
|
|
#else
|
|
|
|
return strncmp(_string1, _string2, count);
|
|
|
|
#endif
|
|
}
|