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d3a156caf5
A common complain with libSQL is how to run extensions. The main mechanism, with a .so, has a lot of issues around how those .so are distributed. The most common extensions are the ones in the sqlean package. We can improve this experience by bundling them in our sqlite build. Not all SQLean extensions are kosher: some of them, like fileio, use the vfs. Others, are deemed too complex. The extensions included here are a subset that we deem important enough, and low risk enough, to just be a part of the main bundle.
121 lines
3.7 KiB
C
121 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 "regexp/pcre2/config.h"
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#endif
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#include "regexp/pcre2/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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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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