# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1234123956 -3600
# Node ID 86b1cb893b1f2e8e05bffad19c469efe987282f4
# Parent  5b8f2e5010a70ac00684057b958d6f46589c349d
New module 'unicase/base'.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-02-08  Bruno Haible  <bruno@clisp.org>
+
+	New module 'unicase/base'.
+	* modules/unicase/base: New file.
+	* lib/unicase.h: New file.
+
 2009-02-08  Bruno Haible  <bruno@clisp.org>
 
 	New module 'uniwbrk/ulc-wordbreaks'.
diff --git a/lib/unicase.h b/lib/unicase.h
new file mode 100644
--- /dev/null
+++ b/lib/unicase.h
@@ -0,0 +1,120 @@
+/* Unicode character case mappings.
+   Copyright (C) 2002, 2009 Free Software Foundation, Inc.
+
+   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/>.  */
+
+#ifndef _UNICASE_H
+#define _UNICASE_H
+
+#include "unitypes.h"
+
+/* Get size_t.  */
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* ========================================================================= */
+
+/* Character case mappings.
+   These mappings are locale and context independent.
+   WARNING! These functions are not sufficient for languages such as German.
+   Better use the functions below that treat an entire string at once and are
+   language aware.  */
+
+/* Return the uppercase mapping of a Unicode character.  */
+extern ucs4_t
+       uc_toupper (ucs4_t uc);
+
+/* Return the lowercase mapping of a Unicode character.  */
+extern ucs4_t
+       uc_tolower (ucs4_t uc);
+
+/* Return the titlecase mapping of a Unicode character.  */
+extern ucs4_t
+       uc_totitle (ucs4_t uc);
+
+/* ========================================================================= */
+
+/* String case mappings.  */
+
+/* These functions are locale dependent.  The iso639_language argument
+   identifies the language (e.g. "tr" for Turkish).  NULL means to use
+   locale independent case mappings.  */
+
+/* Return the ISO 639 language code of the current locale.
+   Return "" if it is unknown, or in the "C" locale.  */
+extern const char *
+       uc_locale_language (void);
+
+/* Return the uppercase mapping of a string.  */
+extern uint8_t *
+       u8_toupper (const uint8_t *s, size_t n, const char *iso639_language, uint8_t *resultbuf, size_t *lengthp);
+extern uint16_t *
+       u16_toupper (const uint16_t *s, size_t n, const char *iso639_language, uint16_t *resultbuf, size_t *lengthp);
+extern uint32_t *
+       u32_toupper (const uint32_t *s, size_t n, const char *iso639_language, uint32_t *resultbuf, size_t *lengthp);
+
+/* Return the lowercase mapping of a string.  */
+extern uint8_t *
+       u8_tolower (const uint8_t *s, size_t n, const char *iso639_language, uint8_t *resultbuf, size_t *lengthp);
+extern uint16_t *
+       u16_tolower (const uint16_t *s, size_t n, const char *iso639_language, uint16_t *resultbuf, size_t *lengthp);
+extern uint32_t *
+       u32_tolower (const uint32_t *s, size_t n, const char *iso639_language, uint32_t *resultbuf, size_t *lengthp);
+
+/* Return the titlecase mapping of a string.  */
+extern uint8_t *
+       u8_totitle (const uint8_t *s, size_t n, const char *iso639_language, uint8_t *resultbuf, size_t *lengthp);
+extern uint16_t *
+       u16_totitle (const uint16_t *s, size_t n, const char *iso639_language, uint16_t *resultbuf, size_t *lengthp);
+extern uint32_t *
+       u32_totitle (const uint32_t *s, size_t n, const char *iso639_language, uint32_t *resultbuf, size_t *lengthp);
+
+/* Return the case folded string.  */
+extern uint8_t *
+       u8_casefold (const uint8_t *s, size_t n, uint8_t *resultbuf, size_t *lengthp);
+extern uint16_t *
+       u16_casefold (const uint16_t *s, size_t n, uint16_t *resultbuf, size_t *lengthp);
+extern uint32_t *
+       u32_casefold (const uint32_t *s, size_t n, uint32_t *resultbuf, size_t *lengthp);
+
+/* Compare S1 and S2, ignoring case.
+   Return -1 if S1 < S2, 0 if S1 = S2, 1 if S1 > S2.  */
+extern int
+       u8_casecmp (const uint8_t *s1, size_t n1, const uint8_t *s2, size_t n2);
+extern int
+       u16_casecmp (const uint16_t *s1, size_t n1, const uint16_t *s2, size_t n2);
+extern int
+       u32_casecmp (const uint32_t *s1, size_t n1, const uint32_t *s2, size_t n2);
+
+/* Compare S1 and S2 using the collation rules of the current locale,
+   ignoring case.
+   Return -1 if S1 < S2, 0 if S1 = S2, 1 if S1 > S2.
+   Upon failure, set errno and return any value.  */
+extern int
+       u8_casecoll (const uint8_t *s1, size_t n1, const uint8_t *s2, size_t n2);
+extern int
+       u16_casecoll (const uint16_t *s1, size_t n1, const uint16_t *s2, size_t n2);
+extern int
+       u32_casecoll (const uint32_t *s1, size_t n1, const uint32_t *s2, size_t n2);
+
+/* ========================================================================= */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _UNICASE_H */
diff --git a/modules/unicase/base b/modules/unicase/base
new file mode 100644
--- /dev/null
+++ b/modules/unicase/base
@@ -0,0 +1,22 @@
+Description:
+Base layer for Unicode character case mappings.
+
+Files:
+lib/unicase.h
+
+Depends-on:
+unitypes
+
+configure.ac:
+
+Makefile.am:
+
+Include:
+"unicase.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+