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Diffstat (limited to 'source4/lib/util/util_unistr.c')
| -rw-r--r-- | source4/lib/util/util_unistr.c | 150 |
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; +} |