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120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/*************************************************
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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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Original API code Copyright (c) 1997-2012 University of Cambridge
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New API code Copyright (c) 2016 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 file contains a function that converts a Unicode character code point
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into a UTF string. The behaviour is different for each code unit width. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcre2_internal.h"
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/* If SUPPORT_UNICODE is not defined, this function will never be called.
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Supply a dummy function because some compilers do not like empty source
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modules. */
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#ifndef SUPPORT_UNICODE
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unsigned int
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PRIV(ord2utf)(uint32_t cvalue, PCRE2_UCHAR *buffer)
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{
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(void)(cvalue);
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(void)(buffer);
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return 0;
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}
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#else /* SUPPORT_UNICODE */
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/*************************************************
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* Convert code point to UTF *
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*************************************************/
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/*
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Arguments:
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cvalue the character value
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buffer pointer to buffer for result
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Returns: number of code units placed in the buffer
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*/
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unsigned int
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PRIV(ord2utf)(uint32_t cvalue, PCRE2_UCHAR *buffer)
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{
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/* Convert to UTF-8 */
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#if PCRE2_CODE_UNIT_WIDTH == 8
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register int i, j;
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for (i = 0; i < PRIV(utf8_table1_size); i++)
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if ((int)cvalue <= PRIV(utf8_table1)[i]) break;
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buffer += i;
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for (j = i; j > 0; j--)
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{
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*buffer-- = 0x80 | (cvalue & 0x3f);
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cvalue >>= 6;
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}
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*buffer = PRIV(utf8_table2)[i] | cvalue;
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return i + 1;
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/* Convert to UTF-16 */
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#elif PCRE2_CODE_UNIT_WIDTH == 16
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if (cvalue <= 0xffff)
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{
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*buffer = (PCRE2_UCHAR)cvalue;
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return 1;
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}
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cvalue -= 0x10000;
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*buffer++ = 0xd800 | (cvalue >> 10);
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*buffer = 0xdc00 | (cvalue & 0x3ff);
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return 2;
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/* Convert to UTF-32 */
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#else
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*buffer = (PCRE2_UCHAR)cvalue;
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return 1;
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#endif
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}
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#endif /* SUPPORT_UNICODE */
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/* End of pcre_ord2utf.c */
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