branches/pcre16/pcre16_utf16_utils.c

/*************************************************
*      Perl-Compatible Regular Expressions       *
*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax
and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel
           Copyright (c) 1997-2009 University of Cambridge

-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

    * Neither the name of the University of Cambridge nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
-----------------------------------------------------------------------------
*/


/* This module contains a function for converting any UTF-16 character
strings to host byte order. */


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "pcre_internal.h"

int
pcre16_utf16_to_host_byte_order(PCRE_SCHAR16 *output, PCRE_SPTR16 input, int length, int keep_boms)
{
#ifdef SUPPORT_UTF16
/* This function converts any UTF-16 string to host byte order and optionally removes
any Byte Order Marks (BOMS). Returns with the remainig length. */
BOOL same_bo = TRUE;
PCRE_SPTR16 end = input + length;
/* The c variable must be unsigned. */
register pcre_uchar c;

while (input < end)
  {
  c = *input++;
  if (c == 0xfeff || c == 0xfffe)
    {
    /* Detecting the byte order of the machine is unnecessary, it is
    enough to know that the UTF-16 string has the same byte order or not. */
    same_bo = c == 0xfeff;
    if (keep_boms != 0)
      *output++ = 0xfeff;
    else
      length--;
    }
  else
    *output++ = same_bo ? c : ((c >> 8) | (c << 8)); /* Flip bytes if needed. */
  }

#else
(void)(output);  /* Keep picky compilers happy */
(void)(input);
(void)(keep_boms);
#endif
return length;
}

/* End of pcre16_utf16_utils.c */
1	ph10	757	/*************************************************
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			#include "pcre_internal.h"
50
51			int
52			pcre16_utf16_to_host_byte_order(PCRE_SCHAR16 *output, PCRE_SPTR16 input, int length, int keep_boms)
53			{
54			#ifdef SUPPORT_UTF16
55			/* This function converts any UTF-16 string to host byte order and optionally removes
56			any Byte Order Marks (BOMS). Returns with the remainig length. */
57			BOOL same_bo = TRUE;
58			PCRE_SPTR16 end = input + length;
59			/* The c variable must be unsigned. */
60	zherczeg	781	register pcre_uchar c;
61	ph10	757
62			while (input < end)
63			{
64			c = *input++;
65			if (c == 0xfeff \|\| c == 0xfffe)
66			{
67			/* Detecting the byte order of the machine is unnecessary, it is
68			enough to know that the UTF-16 string has the same byte order or not. */
69			same_bo = c == 0xfeff;
70			if (keep_boms != 0)
71			*output++ = 0xfeff;
72			else
73			length--;
74			}
75			else
76			output++ = same_bo ? c : ((c >> 8) \| (c << 8)); / Flip bytes if needed. */
77			}
78
79			#else
80			(void)(output); /* Keep picky compilers happy */
81			(void)(input);
82			(void)(keep_boms);
83			#endif
84			return length;
85			}
86
87	zherczeg	764	/* End of pcre16_utf16_utils.c */