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author | chpe <chpe@2f5784b3-3f2a-0410-8824-cb99058d5e15> | 2012-10-16 15:53:30 +0000 |
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committer | chpe <chpe@2f5784b3-3f2a-0410-8824-cb99058d5e15> | 2012-10-16 15:53:30 +0000 |
commit | 62c2f93fe63ee94ff2692091a42a7d594f5d4fe3 (patch) | |
tree | 3d1739b24c57943c20fa880eed55ab341db96a81 /pcre32_ord2utf32.c | |
parent | 3f6d05379ea067a3b4f4a61e4be268ee8c37e7a6 (diff) | |
download | pcre-62c2f93fe63ee94ff2692091a42a7d594f5d4fe3.tar.gz |
pcre32: Add 32-bit library
Create libpcre32 that operates on 32-bit characters (UTF-32).
This turned out to be surprisingly simple after the UTF-16 support
was introduced; mostly just extra ifdefs and adjusting and adding
some tests.
git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1055 2f5784b3-3f2a-0410-8824-cb99058d5e15
Diffstat (limited to 'pcre32_ord2utf32.c')
-rw-r--r-- | pcre32_ord2utf32.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/pcre32_ord2utf32.c b/pcre32_ord2utf32.c new file mode 100644 index 0000000..8f71e85 --- /dev/null +++ b/pcre32_ord2utf32.c @@ -0,0 +1,90 @@ +/************************************************* +* 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) 1997-2012 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 file contains a private PCRE function that converts an ordinal +character value into a UTF32 string. */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +/* Generate code with 32 bit character support. */ +#define COMPILE_PCRE32 + +#include "pcre_internal.h" + +#define MASK (0x1fffffu) + +/************************************************* +* Convert character value to UTF-32 * +*************************************************/ + +/* This function takes an integer value in the range 0 - 0x10ffff +and encodes it as a UTF-32 character in 1 pcre_uchars. + +Arguments: + cvalue the character value + buffer pointer to buffer for result - at least 1 pcre_uchars long + +Returns: number of characters placed in the buffer +*/ + +int +PRIV(ord2utf)(pcre_uint32 cvalue, pcre_uchar *buffer) +{ +#ifdef SUPPORT_UTF + +cvalue &= MASK; + +/* Checking invalid cvalue character, encoded as invalid UTF-32 character */ +if ((cvalue & 0xfffff800u) == 0xd800u || cvalue >= 0x110000u) + cvalue = 0xfffeu; + +*buffer = (pcre_uchar)cvalue; +return 1; + +#else /* SUPPORT_UTF */ +(void)(cvalue); /* Keep compiler happy; this function won't ever be */ +(void)(buffer); /* called when SUPPORT_UTF is not defined. */ +return 0; +#endif /* SUPPORT_UTF */ +} + +/* End of pcre32_ord2utf32.c */ |