diff options
Diffstat (limited to 'newlib/libc/posix/collcmp.c')
-rw-r--r-- | newlib/libc/posix/collcmp.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/newlib/libc/posix/collcmp.c b/newlib/libc/posix/collcmp.c new file mode 100644 index 000000000..777089761 --- /dev/null +++ b/newlib/libc/posix/collcmp.c @@ -0,0 +1,84 @@ +/* + * Copyright (C) 1996 by Andrey A. Chernov, Moscow, Russia. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +#define ASCII_COMPATIBLE_COLLATE /* see share/colldef */ + +#include <string.h> +#include "collate.h" +#ifndef ASCII_COMPATIBLE_COLLATE +#include <ctype.h> +#endif + +/* + * Compare two characters converting collate information + * into ASCII-compatible range, it allows to handle + * "[a-z]"-type ranges with national characters. + */ + +int __collate_range_cmp (c1, c2) + int c1, c2; +{ + static char s1[2], s2[2]; + int ret; +#ifndef ASCII_COMPATIBLE_COLLATE + int as1, as2, al1, al2; +#endif + + c1 &= UCHAR_MAX; + c2 &= UCHAR_MAX; + if (c1 == c2) + return (0); + +#ifndef ASCII_COMPATIBLE_COLLATE + as1 = isascii(c1); + as2 = isascii(c2); + al1 = isalpha(c1); + al2 = isalpha(c2); + + if (as1 || as2 || al1 || al2) { + if ((as1 && as2) || (!al1 && !al2)) + return (c1 - c2); + if (al1 && !al2) { + if (isupper(c1)) + return ('A' - c2); + else + return ('a' - c2); + } else if (al2 && !al1) { + if (isupper(c2)) + return (c1 - 'A'); + else + return (c1 - 'a'); + } + } +#endif + s1[0] = c1; + s2[0] = c2; + if ((ret = strcoll(s1, s2)) != 0) + return (ret); + return (c1 - c2); +} |