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authorJelmer Vernooij <jelmer@samba.org>2006-02-23 15:52:24 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:52:05 -0500
commitdfc517b05395d925a4d7b1ce9633a849f9468e70 (patch)
treea81c020c89022980e6fbb68116648da217fbb0fc /source4/lib/util/util_unistr.c
parent80c8a522861068e7b0974986936f65052dd6f70f (diff)
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r13658: More moving around of files:
- Collect the generic utility functions into a lib/util/ (a la GLib is for the GNOME folks) - Remove even more files from include/ (This used to be commit ba62880f5b05c2a505dc7f54676b231197a7e707)
Diffstat (limited to 'source4/lib/util/util_unistr.c')
-rw-r--r--source4/lib/util/util_unistr.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/source4/lib/util/util_unistr.c b/source4/lib/util/util_unistr.c
new file mode 100644
index 0000000000..b35822877c
--- /dev/null
+++ b/source4/lib/util/util_unistr.c
@@ -0,0 +1,150 @@
+/*
+ Unix SMB/CIFS implementation.
+ Samba utility functions
+ Copyright (C) Andrew Tridgell 1992-2001
+ Copyright (C) Simo Sorce 2001
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "system/iconv.h"
+
+/* these 2 tables define the unicode case handling. They are loaded
+ at startup either via mmap() or read() from the lib directory */
+static void *upcase_table;
+static void *lowcase_table;
+
+
+/*******************************************************************
+load the case handling tables
+********************************************************************/
+static void load_case_tables(void)
+{
+ TALLOC_CTX *mem_ctx;
+
+ mem_ctx = talloc_init("load_case_tables");
+ if (!mem_ctx) {
+ smb_panic("No memory for case_tables");
+ }
+ upcase_table = map_file(lib_path(mem_ctx, "upcase.dat"), 0x20000);
+ lowcase_table = map_file(lib_path(mem_ctx, "lowcase.dat"), 0x20000);
+ talloc_free(mem_ctx);
+ if (upcase_table == NULL) {
+ /* try also under codepages for testing purposes */
+ upcase_table = map_file("codepages/upcase.dat", 0x20000);
+ if (upcase_table == NULL) {
+ upcase_table = (void *)-1;
+ }
+ }
+ if (lowcase_table == NULL) {
+ /* try also under codepages for testing purposes */
+ lowcase_table = map_file("codepages/lowcase.dat", 0x20000);
+ if (lowcase_table == NULL) {
+ lowcase_table = (void *)-1;
+ }
+ }
+}
+
+/*******************************************************************
+ Convert a codepoint_t to upper case.
+********************************************************************/
+codepoint_t toupper_w(codepoint_t val)
+{
+ if (val < 128) {
+ return toupper(val);
+ }
+ if (upcase_table == NULL) {
+ load_case_tables();
+ }
+ if (upcase_table == (void *)-1) {
+ return val;
+ }
+ if (val & 0xFFFF0000) {
+ return val;
+ }
+ return SVAL(upcase_table, val*2);
+}
+
+/*******************************************************************
+ Convert a codepoint_t to lower case.
+********************************************************************/
+codepoint_t tolower_w(codepoint_t val)
+{
+ if (val < 128) {
+ return tolower(val);
+ }
+ if (lowcase_table == NULL) {
+ load_case_tables();
+ }
+ if (lowcase_table == (void *)-1) {
+ return val;
+ }
+ if (val & 0xFFFF0000) {
+ return val;
+ }
+ return SVAL(lowcase_table, val*2);
+}
+
+/*******************************************************************
+return the number of bytes occupied by a buffer in CH_UTF16 format
+the result includes the null termination
+********************************************************************/
+size_t utf16_len(const void *buf)
+{
+ size_t len;
+
+ for (len = 0; SVAL(buf,len); len += 2) ;
+
+ return len + 2;
+}
+
+/*******************************************************************
+return the number of bytes occupied by a buffer in CH_UTF16 format
+the result includes the null termination
+limited by 'n' bytes
+********************************************************************/
+size_t utf16_len_n(const void *src, size_t n)
+{
+ size_t len;
+
+ for (len = 0; (len+2 < n) && SVAL(src, len); len += 2) ;
+
+ if (len+2 <= n) {
+ len += 2;
+ }
+
+ return len;
+}
+
+
+size_t ucs2_align(const void *base_ptr, const void *p, int flags)
+{
+ if (flags & (STR_NOALIGN|STR_ASCII))
+ return 0;
+ return PTR_DIFF(p, base_ptr) & 1;
+}
+
+/*
+ compare two codepoints case insensitively
+*/
+int codepoint_cmpi(codepoint_t c1, codepoint_t c2)
+{
+ if (c1 == c2 ||
+ toupper_w(c1) == toupper_w(c2)) {
+ return 0;
+ }
+ return c1 - c2;
+}