Allow using Glib for UTF8 support

2 files changed, 162 insertions, 0 deletions

diff --git a/src/util/sss_utf8.c b/src/util/sss_utf8.c
new file mode 100644
index 00000000..4a98233b
--- /dev/null
+++ b/src/util/sss_utf8.c
@@ -0,0 +1,119 @@
+/*
+    SSSD
+
+    Authors:
+        Stephen Gallagher <sgallagh@redhat.com>
+
+    Copyright (C) 2011 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "util/util.h"
+#include "sss_utf8.h"
+
+#ifdef HAVE_LIBUNISTRING
+bool sss_utf8_check(const uint8_t *s, size_t n)
+{
+    if (u8_check(s, n) == NULL) {
+        return true;
+    }
+    return false;
+}
+
+#elif HAVE_GLIB2
+bool sss_utf8_check(const uint8_t *s, size_t n)
+{
+    return g_utf8_validate((const gchar *)s, n, NULL);
+}
+
+#else
+#error No unicode library
+#endif
+
+/* Returns EOK on match, ENOTUNIQ if comparison succeeds but
+ * does not match.
+ * May return other errno error codes on failure
+ */
+#ifdef HAVE_LIBUNISTRING
+errno_t sss_utf8_case_eq(const uint8_t *s1, const uint8_t *s2)
+{
+
+    /* Do a case-insensitive comparison.
+     * The input must be encoded in UTF8.
+     * We have no way of knowing the language,
+     * so we'll pass NULL for the language and
+     * hope for the best.
+     */
+    int ret;
+    int resultp;
+    size_t n1, n2;
+    errno = 0;
+
+    n1 = u8_strlen(s1);
+    n2 = u8_strlen(s2);
+
+    ret = u8_casecmp(s1, n1,
+                     s2, n2,
+                     NULL, NULL,
+                     &resultp);
+    if (ret < 0) {
+        /* An error occurred */
+        return errno;
+    }
+
+    if (resultp == 0) {
+        return EOK;
+    }
+    return ENOMATCH;
+}
+
+#elif HAVE_GLIB2
+errno_t sss_utf8_case_eq(const uint8_t *s1, const uint8_t *s2)
+{
+    gchar *gs1;
+    gchar *gs2;
+    gssize n1, n2;
+    gint gret;
+    errno_t ret;
+
+    n1 = g_utf8_strlen((const gchar *)s1, -1);
+    n2 = g_utf8_strlen((const gchar *)s2, -1);
+
+    gs1 = g_utf8_casefold((const gchar *)s1, n1);
+    if (gs1 == NULL) {
+        return ENOMEM;
+    }
+
+    gs2 = g_utf8_casefold((const gchar *)s2, n2);
+    if (gs2 == NULL) {
+        return ENOMEM;
+    }
+
+    gret = g_utf8_collate(gs1, gs2);
+    if (gret == 0) {
+        ret = EOK;
+    } else {
+        ret = ENOMATCH;
+    }
+
+    g_free(gs1);
+    g_free(gs2);
+
+    return ret;
+}
+
+#else
+#error No unicode library
+#endif
diff --git a/src/util/sss_utf8.h b/src/util/sss_utf8.h
new file mode 100644
index 00000000..37dcff95
--- /dev/null
+++ b/src/util/sss_utf8.h
@@ -0,0 +1,43 @@
+/*
+    SSSD
+
+    Authors:
+        Stephen Gallagher <sgallagh@redhat.com>
+
+    Copyright (C) 2011 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef SSS_UTF8_H_
+#define SSS_UTF8_H_
+
+#ifdef HAVE_LIBUNISTRING
+#include <unistr.h>
+#include <unicase.h>
+#elif HAVE_GLIB2
+#include <glib.h>
+#endif
+#include "util/util.h"
+
+#ifndef ENOMATCH
+#define ENOMATCH -1
+#endif
+
+bool sss_utf8_check(const uint8_t *s, size_t n);
+
+errno_t sss_utf8_case_eq(const uint8_t *s1, const uint8_t *s2);
+
+
+#endif /* SSS_UTF8_H_ */