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pcre_ord2utf8.c
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00001 /*************************************************
00002 *      Perl-Compatible Regular Expressions       *
00003 *************************************************/
00004 
00005 /* PCRE is a library of functions to support regular expressions whose syntax
00006 and semantics are as close as possible to those of the Perl 5 language.
00007 
00008                        Written by Philip Hazel
00009            Copyright (c) 1997-2008 University of Cambridge
00010 
00011 -----------------------------------------------------------------------------
00012 Redistribution and use in source and binary forms, with or without
00013 modification, are permitted provided that the following conditions are met:
00014 
00015     * Redistributions of source code must retain the above copyright notice,
00016       this list of conditions and the following disclaimer.
00017 
00018     * Redistributions in binary form must reproduce the above copyright
00019       notice, this list of conditions and the following disclaimer in the
00020       documentation and/or other materials provided with the distribution.
00021 
00022     * Neither the name of the University of Cambridge nor the names of its
00023       contributors may be used to endorse or promote products derived from
00024       this software without specific prior written permission.
00025 
00026 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00027 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00028 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00029 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00030 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00031 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00032 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00033 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00034 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00035 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00036 POSSIBILITY OF SUCH DAMAGE.
00037 -----------------------------------------------------------------------------
00038 */
00039 
00040 
00041 /* This file contains a private PCRE function that converts an ordinal
00042 character value into a UTF8 string. */
00043 
00044 #include "config.h"
00045 
00046 #include "pcre_internal.h"
00047 
00048 
00049 /*************************************************
00050 *       Convert character value to UTF-8         *
00051 *************************************************/
00052 
00053 /* This function takes an integer value in the range 0 - 0x7fffffff
00054 and encodes it as a UTF-8 character in 0 to 6 bytes.
00055 
00056 Arguments:
00057   cvalue     the character value
00058   buffer     pointer to buffer for result - at least 6 bytes long
00059 
00060 Returns:     number of characters placed in the buffer
00061 */
00062 
00063 int
00064 _pcre_ord2utf8(int cvalue, uschar *buffer)
00065 {
00066 #ifdef SUPPORT_UTF8
00067 register int i, j;
00068 for (i = 0; i < _pcre_utf8_table1_size; i++)
00069   if (cvalue <= _pcre_utf8_table1[i]) break;
00070 buffer += i;
00071 for (j = i; j > 0; j--)
00072  {
00073  *buffer-- = 0x80 | (cvalue & 0x3f);
00074  cvalue >>= 6;
00075  }
00076 *buffer = _pcre_utf8_table2[i] | cvalue;
00077 return i + 1;
00078 #else
00079 (void)(cvalue);  /* Keep compiler happy; this function won't ever be */
00080 (void)(buffer);  /* called when SUPPORT_UTF8 is not defined. */
00081 return 0;
00082 #endif
00083 }
00084 
00085 /* End of pcre_ord2utf8.c */