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 */ 32static void *upcase_table; 33static void *lowcase_table; 34 35 36/******************************************************************* 37load the case handling tables 38********************************************************************/ 39void load_case_tables(void) 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) 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) 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) 110{ 111 if (c1 == c2 || 112 toupper_m(c1) == toupper_m(c2)) { 113 return 0; 114 } 115 return c1 - c2; 116} 117 118 119