Last change
on this file since 466 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.1 KB
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Rev | Line | |
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[444] | 1 | /* |
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| 2 | FUNCTION |
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| 3 | <<wcscasecmp>>---case-insensitive wide character string compare |
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| 4 | |
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| 5 | INDEX |
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| 6 | wcscasecmp |
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| 7 | |
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| 8 | SYNOPSIS |
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| 9 | #include <wchar.h> |
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| 10 | int wcscasecmp(const wchar_t *<[a]>, const wchar_t *<[b]>); |
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| 11 | |
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| 12 | DESCRIPTION |
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| 13 | <<wcscasecmp>> compares the wide character string at <[a]> to |
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| 14 | the wide character string at <[b]> in a case-insensitive manner. |
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| 15 | |
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| 16 | RETURNS |
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| 17 | |
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| 18 | If <<*<[a]>>> sorts lexicographically after <<*<[b]>>> (after |
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| 19 | both are converted to uppercase), <<wcscasecmp>> returns a |
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| 20 | number greater than zero. If the two strings match, |
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| 21 | <<wcscasecmp>> returns zero. If <<*<[a]>>> sorts |
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| 22 | lexicographically before <<*<[b]>>>, <<wcscasecmp>> returns a |
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| 23 | number less than zero. |
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| 24 | |
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| 25 | PORTABILITY |
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| 26 | POSIX-1.2008 |
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| 27 | |
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| 28 | <<wcscasecmp>> requires no supporting OS subroutines. It uses |
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| 29 | tolower() from elsewhere in this library. |
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| 30 | |
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| 31 | QUICKREF |
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| 32 | wcscasecmp |
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| 33 | */ |
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| 34 | |
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| 35 | #include <wchar.h> |
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| 36 | #include <wctype.h> |
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| 37 | |
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| 38 | int |
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| 39 | wcscasecmp (const wchar_t *s1, |
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| 40 | const wchar_t *s2) |
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| 41 | { |
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| 42 | int d = 0; |
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| 43 | for ( ; ; ) |
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| 44 | { |
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| 45 | const int c1 = towlower (*s1++); |
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| 46 | const int c2 = towlower (*s2++); |
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| 47 | if (((d = c1 - c2) != 0) || (c2 == '\0')) |
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| 48 | break; |
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| 49 | } |
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| 50 | return d; |
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| 51 | } |
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