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/*************************************************
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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Written by Philip Hazel
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Copyright (c) 1997-2009 University of Cambridge
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-----------------------------------------------------------------------------
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the University of Cambridge nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
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/* This module contains a function for converting any UTF-16 character
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strings to host byte order. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* Generate code with 16 bit character support. */
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#define COMPILE_PCRE16
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#include "pcre_internal.h"
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int
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pcre16_utf16_to_host_byte_order(PCRE_SCHAR16 *output, PCRE_SPTR16 input, int length, int keep_boms)
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{
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#ifdef SUPPORT_UTF16
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/* This function converts any UTF-16 string to host byte order and optionally removes
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any Byte Order Marks (BOMS). Returns with the remainig length. */
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BOOL same_bo = TRUE;
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PCRE_SPTR16 end = input + length;
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/* The c variable must be unsigned. */
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register pcre_uchar c;
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while (input < end)
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{
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c = *input++;
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if (c == 0xfeff || c == 0xfffe)
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{
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/* Detecting the byte order of the machine is unnecessary, it is
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enough to know that the UTF-16 string has the same byte order or not. */
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same_bo = c == 0xfeff;
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if (keep_boms != 0)
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*output++ = 0xfeff;
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else
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length--;
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}
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else
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*output++ = same_bo ? c : ((c >> 8) | (c << 8)); /* Flip bytes if needed. */
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}
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#else
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(void)(output); /* Keep picky compilers happy */
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(void)(input);
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(void)(keep_boms);
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#endif
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return length;
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}
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/* End of pcre16_utf16_utils.c */
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