/[pcre]/code/trunk/pcre16_utf16_utils.c
ViewVC logotype

Contents of /code/trunk/pcre16_utf16_utils.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 782 - (show annotations) (download)
Sat Dec 3 23:58:37 2011 UTC (2 years, 8 months ago) by zherczeg
Original Path: code/branches/pcre16/pcre16_utf16_utils.c
File MIME type: text/plain
File size: 3275 byte(s)
Start working on UTF-16. Updating macros and adding new ones.
1 /*************************************************
2 * Perl-Compatible Regular Expressions *
3 *************************************************/
4
5 /* PCRE is a library of functions to support regular expressions whose syntax
6 and semantics are as close as possible to those of the Perl 5 language.
7
8 Written by Philip Hazel
9 Copyright (c) 1997-2009 University of Cambridge
10
11 -----------------------------------------------------------------------------
12 Redistribution and use in source and binary forms, with or without
13 modification, are permitted provided that the following conditions are met:
14
15 * Redistributions of source code must retain the above copyright notice,
16 this list of conditions and the following disclaimer.
17
18 * Redistributions in binary form must reproduce the above copyright
19 notice, this list of conditions and the following disclaimer in the
20 documentation and/or other materials provided with the distribution.
21
22 * Neither the name of the University of Cambridge nor the names of its
23 contributors may be used to endorse or promote products derived from
24 this software without specific prior written permission.
25
26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 POSSIBILITY OF SUCH DAMAGE.
37 -----------------------------------------------------------------------------
38 */
39
40
41 /* This module contains a function for converting any UTF-16 character
42 strings to host byte order. */
43
44
45 #ifdef HAVE_CONFIG_H
46 #include "config.h"
47 #endif
48
49 /* Generate code with 16 bit character support. */
50 #define COMPILE_PCRE16
51
52 #include "pcre_internal.h"
53
54 int
55 pcre16_utf16_to_host_byte_order(PCRE_SCHAR16 *output, PCRE_SPTR16 input, int length, int keep_boms)
56 {
57 #ifdef SUPPORT_UTF16
58 /* This function converts any UTF-16 string to host byte order and optionally removes
59 any Byte Order Marks (BOMS). Returns with the remainig length. */
60 BOOL same_bo = TRUE;
61 PCRE_SPTR16 end = input + length;
62 /* The c variable must be unsigned. */
63 register pcre_uchar c;
64
65 while (input < end)
66 {
67 c = *input++;
68 if (c == 0xfeff || c == 0xfffe)
69 {
70 /* Detecting the byte order of the machine is unnecessary, it is
71 enough to know that the UTF-16 string has the same byte order or not. */
72 same_bo = c == 0xfeff;
73 if (keep_boms != 0)
74 *output++ = 0xfeff;
75 else
76 length--;
77 }
78 else
79 *output++ = same_bo ? c : ((c >> 8) | (c << 8)); /* Flip bytes if needed. */
80 }
81
82 #else
83 (void)(output); /* Keep picky compilers happy */
84 (void)(input);
85 (void)(keep_boms);
86 #endif
87 return length;
88 }
89
90 /* End of pcre16_utf16_utils.c */

webmaster@exim.org
ViewVC Help
Powered by ViewVC 1.1.12