diff options
Diffstat (limited to 'lib/util/charset/codepoints.c')
-rw-r--r-- | lib/util/charset/codepoints.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/lib/util/charset/codepoints.c b/lib/util/charset/codepoints.c new file mode 100644 index 0000000000..a940c1baf0 --- /dev/null +++ b/lib/util/charset/codepoints.c @@ -0,0 +1,118 @@ +/* + 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 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 "includes.h" +#include "system/locale.h" +#include "dynconfig/dynconfig.h" + +/** + * @file + * @brief Unicode string manipulation + */ + +/* 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 +********************************************************************/ +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(talloc_asprintf(mem_ctx, "%s/upcase.dat", dyn_DATADIR), 0x20000); + lowcase_table = map_file(talloc_asprintf(mem_ctx, "%s/lowcase.dat", dyn_DATADIR), 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. +**/ +_PUBLIC_ codepoint_t toupper_m(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. +**/ +_PUBLIC_ codepoint_t tolower_m(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); +} + +/** + compare two codepoints case insensitively +*/ +_PUBLIC_ int codepoint_cmpi(codepoint_t c1, codepoint_t c2) +{ + if (c1 == c2 || + toupper_m(c1) == toupper_m(c2)) { + return 0; + } + return c1 - c2; +} + + |