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-rw-r--r--lib/unicase/ulc-casecmp.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/unicase/ulc-casecmp.c b/lib/unicase/ulc-casecmp.c
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+/* Case and normalization insensitive comparison of strings.
+ Copyright (C) 2009 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include "unicase.h"
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include "minmax.h"
+#include "uninorm.h"
+#include "uniconv.h"
+#include "unistr.h"
+
+static uint8_t *
+ulc_u8_casefold (const char *s, size_t n, const char *iso639_language,
+ uninorm_t nf,
+ uint8_t *resultbuf, size_t *lengthp)
+{
+ uint8_t convbuf[2048 / sizeof (uint8_t)];
+ uint8_t *conv;
+ size_t conv_length;
+ uint8_t *result;
+
+ /* Convert the string to UTF-8. */
+ conv_length = sizeof (convbuf) / sizeof (uint8_t);
+ conv =
+ u8_conv_from_encoding (locale_charset (), iconveh_error, s, n, NULL,
+ convbuf, &conv_length);
+ if (conv == NULL)
+ /* errno is set here. */
+ return NULL;
+
+ /* Case-fold and normalize. */
+ result = u8_casefold (conv, conv_length, iso639_language, nf,
+ resultbuf, lengthp);
+ if (result == NULL)
+ {
+ if (conv != convbuf)
+ {
+ int saved_errno = errno;
+ free (conv);
+ errno = saved_errno;
+ }
+ return NULL;
+ }
+
+ if (conv != convbuf)
+ free (conv);
+ return result;
+}
+
+#define FUNC ulc_casecmp
+#define UNIT uint8_t
+#define SRC_UNIT char
+#define U_CASEFOLD ulc_u8_casefold
+#define U_CMP2 u8_cmp2
+#include "u-casecmp.h"