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