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DEFINITIONS
This source file includes following definitions.
- load_case_tables
- toupper_m
- tolower_m
- codepoint_cmpi
1 /*
2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-2001
5 Copyright (C) Simo Sorce 2001
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/locale.h"
23 #include "dynconfig/dynconfig.h"
24
25 /**
26 * @file
27 * @brief Unicode string manipulation
28 */
29
30 /* these 2 tables define the unicode case handling. They are loaded
31 at startup either via mmap() or read() from the lib directory */
32 static void *upcase_table;
33 static void *lowcase_table;
34
35
36 /*******************************************************************
37 load the case handling tables
38 ********************************************************************/
39 void load_case_tables(void)
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40 {
41 TALLOC_CTX *mem_ctx;
42
43 mem_ctx = talloc_init("load_case_tables");
44 if (!mem_ctx) {
45 smb_panic("No memory for case_tables");
46 }
47 upcase_table = map_file(talloc_asprintf(mem_ctx, "%s/upcase.dat", dyn_DATADIR), 0x20000);
48 lowcase_table = map_file(talloc_asprintf(mem_ctx, "%s/lowcase.dat", dyn_DATADIR), 0x20000);
49 talloc_free(mem_ctx);
50 if (upcase_table == NULL) {
51 /* try also under codepages for testing purposes */
52 upcase_table = map_file("codepages/upcase.dat", 0x20000);
53 if (upcase_table == NULL) {
54 upcase_table = (void *)-1;
55 }
56 }
57 if (lowcase_table == NULL) {
58 /* try also under codepages for testing purposes */
59 lowcase_table = map_file("codepages/lowcase.dat", 0x20000);
60 if (lowcase_table == NULL) {
61 lowcase_table = (void *)-1;
62 }
63 }
64 }
65
66 /**
67 Convert a codepoint_t to upper case.
68 **/
69 _PUBLIC_ codepoint_t toupper_m(codepoint_t val)
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70 {
71 if (val < 128) {
72 return toupper(val);
73 }
74 if (upcase_table == NULL) {
75 load_case_tables();
76 }
77 if (upcase_table == (void *)-1) {
78 return val;
79 }
80 if (val & 0xFFFF0000) {
81 return val;
82 }
83 return SVAL(upcase_table, val*2);
84 }
85
86 /**
87 Convert a codepoint_t to lower case.
88 **/
89 _PUBLIC_ codepoint_t tolower_m(codepoint_t val)
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90 {
91 if (val < 128) {
92 return tolower(val);
93 }
94 if (lowcase_table == NULL) {
95 load_case_tables();
96 }
97 if (lowcase_table == (void *)-1) {
98 return val;
99 }
100 if (val & 0xFFFF0000) {
101 return val;
102 }
103 return SVAL(lowcase_table, val*2);
104 }
105
106 /**
107 compare two codepoints case insensitively
108 */
109 _PUBLIC_ int codepoint_cmpi(codepoint_t c1, codepoint_t c2)
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110 {
111 if (c1 == c2 ||
112 toupper_m(c1) == toupper_m(c2)) {
113 return 0;
114 }
115 return c1 - c2;
116 }
117
118