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/***
*wcsnicmp.c - compare n chars of wide-character strings, ignoring case
*
* Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _wcsnicmp() - Compares at most n characters of two wchar_t
* strings, without regard to case.
*
*Revision History:
* 09-09-91 ETC Created from strnicmp.c and wcsicmp.c.
* 12-09-91 ETC Use C for neutral locale.
* 04-07-92 KRS Updated and ripped out _INTL switches.
* 06-02-93 SRW ignore _INTL if _NTSUBSET_ defined.
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
#include <ctype.h>
#include <locale.h>
#ifdef _INTL
#include <setlocal.h>
#include <os2dll.h>
#endif
/***
*int _wcsnicmp(first, last, count) - compares count wchar_t of strings,
* ignore case
*
*Purpose:
* Compare the two strings for lexical order. Stops the comparison
* when the following occurs: (1) strings differ, (2) the end of the
* strings is reached, or (3) count characters have been compared.
* For the purposes of the comparison, upper case characters are
* converted to lower case (wide-characters).
*
* *** NOTE: the comparison should be done in a neutral locale,
* provided by the NLSAPI. Currently, the comparison is done
* in the C locale. ***
*
*Entry:
* wchar_t *first, *last - strings to compare
* size_t count - maximum number of characters to compare
*
*Exit:
* -1 if first < last
* 0 if first == last
* 1 if first > last
* This range of return values may differ from other *cmp/*coll functions.
*
*Exceptions:
*
*******************************************************************************/
int _CALLTYPE1 _wcsnicmp (
const wchar_t * first,
const wchar_t * last,
size_t count
)
{
wchar_t f,l;
int result = 0;
if (count)
{
#if defined(_INTL) && !defined(_NTSUBSET_)
_mlock (_LC_CTYPE_LOCK);
#endif
do
{
f = iswupper(*first)
? *first - (wchar_t)L'A' + (wchar_t)L'a'
: *first;
l = iswupper(*last)
? *last - (wchar_t)L'A' + (wchar_t)L'a'
: *last;
first++;
last++;
} while (--count && f && l && f == l);
#if defined(_INTL) && !defined(_NTSUBSET_)
_munlock (_LC_CTYPE_LOCK);
#endif
result = (int)(f - l);
}
return result ;
}
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