/[pcre]/code/trunk/pcre_ord2utf8.c
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Contents of /code/trunk/pcre_ord2utf8.c

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Revision 836 - (hide annotations) (download)
Wed Dec 28 17:16:11 2011 UTC (2 years, 7 months ago) by ph10
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Merging all the changes from the pcre16 branch into the trunk.

1 nigel 77 /*************************************************
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 ph10 836 Copyright (c) 1997-2012 University of Cambridge
10 nigel 77
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 file contains a private PCRE function that converts an ordinal
42     character value into a UTF8 string. */
43    
44 ph10 200 #ifdef HAVE_CONFIG_H
45 ph10 236 #include "config.h"
46 ph10 200 #endif
47    
48 nigel 77 #include "pcre_internal.h"
49    
50    
51     /*************************************************
52     * Convert character value to UTF-8 *
53     *************************************************/
54    
55 ph10 836 /* This function takes an integer value in the range 0 - 0x10ffff
56     and encodes it as a UTF-8 character in 1 to 6 pcre_uchars.
57 nigel 77
58     Arguments:
59     cvalue the character value
60 ph10 836 buffer pointer to buffer for result - at least 6 pcre_uchars long
61 nigel 77
62     Returns: number of characters placed in the buffer
63     */
64    
65 nigel 87 int
66 ph10 836 PRIV(ord2utf)(pcre_uint32 cvalue, pcre_uchar *buffer)
67 nigel 77 {
68 ph10 836 #ifdef SUPPORT_UTF
69    
70 nigel 77 register int i, j;
71 ph10 836
72     /* Checking invalid cvalue character, encoded as invalid UTF-16 character.
73     Should never happen in practice. */
74     if ((cvalue & 0xf800) == 0xd800 || cvalue >= 0x110000)
75     cvalue = 0xfffe;
76    
77     for (i = 0; i < PRIV(utf8_table1_size); i++)
78     if (cvalue <= PRIV(utf8_table1)[i]) break;
79 nigel 77 buffer += i;
80     for (j = i; j > 0; j--)
81     {
82     *buffer-- = 0x80 | (cvalue & 0x3f);
83     cvalue >>= 6;
84     }
85 ph10 836 *buffer = PRIV(utf8_table2)[i] | cvalue;
86 nigel 77 return i + 1;
87 ph10 836
88 ph10 110 #else
89 ph10 836
90 ph10 369 (void)(cvalue); /* Keep compiler happy; this function won't ever be */
91 ph10 836 (void)(buffer); /* called when SUPPORT_UTF is not defined. */
92 ph10 371 return 0;
93 ph10 836
94 ph10 371 #endif
95 nigel 77 }
96    
97     /* End of pcre_ord2utf8.c */

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