53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/*
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FUNCTION
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<<wcscasecmp>>---case-insensitive wide character string compare
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INDEX
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wcscasecmp
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SYNOPSIS
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#include <wchar.h>
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int wcscasecmp(const wchar_t *<[a]>, const wchar_t *<[b]>);
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DESCRIPTION
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<<wcscasecmp>> compares the wide character string at <[a]> to
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the wide character string at <[b]> in a case-insensitive manner.
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RETURNS
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If <<*<[a]>>> sorts lexicographically after <<*<[b]>>> (after
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both are converted to uppercase), <<wcscasecmp>> returns a
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number greater than zero. If the two strings match,
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<<wcscasecmp>> returns zero. If <<*<[a]>>> sorts
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lexicographically before <<*<[b]>>>, <<wcscasecmp>> returns a
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number less than zero.
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PORTABILITY
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POSIX-1.2008
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<<wcscasecmp>> requires no supporting OS subroutines. It uses
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tolower() from elsewhere in this library.
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QUICKREF
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wcscasecmp
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*/
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#include <wchar.h>
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#include <wctype.h>
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int
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_DEFUN (wcscasecmp, (s1, s2),
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_CONST wchar_t *s1 _AND
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_CONST wchar_t *s2)
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{
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int d = 0;
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for ( ; ; )
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{
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const int c1 = towlower (*s1++);
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const int c2 = towlower (*s2++);
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if (((d = c1 - c2) != 0) || (c2 == '\0'))
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break;
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}
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return d;
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}
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