/[pcre]/code/branches/pcre16/pcre_ord2utf8.c
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Contents of /code/branches/pcre16/pcre_ord2utf8.c

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Revision 830 - (show annotations) (download)
Tue Dec 27 15:37:13 2011 UTC (2 years, 11 months ago) by ph10
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File size: 3410 byte(s)
Update version and update many copyright dates.

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) 1997-2012 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 file contains a private PCRE function that converts an ordinal
42 character value into a UTF8 string. */
43
44 #ifdef HAVE_CONFIG_H
45 #include "config.h"
46 #endif
47
48 #include "pcre_internal.h"
49
50
51 /*************************************************
52 * Convert character value to UTF-8 *
53 *************************************************/
54
55 /* 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
58 Arguments:
59 cvalue the character value
60 buffer pointer to buffer for result - at least 6 pcre_uchars long
61
62 Returns: number of characters placed in the buffer
63 */
64
65 int
66 PRIV(ord2utf)(pcre_uint32 cvalue, pcre_uchar *buffer)
67 {
68 #ifdef SUPPORT_UTF
69
70 register int i, j;
71
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 buffer += i;
80 for (j = i; j > 0; j--)
81 {
82 *buffer-- = 0x80 | (cvalue & 0x3f);
83 cvalue >>= 6;
84 }
85 *buffer = PRIV(utf8_table2)[i] | cvalue;
86 return i + 1;
87
88 #else
89
90 (void)(cvalue); /* Keep compiler happy; this function won't ever be */
91 (void)(buffer); /* called when SUPPORT_UTF is not defined. */
92 return 0;
93
94 #endif
95 }
96
97 /* End of pcre_ord2utf8.c */

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