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Annotation of embedaddon/pcre/pcre_ord2utf8.c, revision 1.1.1.1

1.1       misho       1: /*************************************************
                      2: *      Perl-Compatible Regular Expressions       *
                      3: *************************************************/
                      4: 
                      5: /* PCRE is a library of functions to support regular expressions whose syntax
                      6: and semantics are as close as possible to those of the Perl 5 language.
                      7: 
                      8:                        Written by Philip Hazel
                      9:            Copyright (c) 1997-2008 University of Cambridge
                     10: 
                     11: -----------------------------------------------------------------------------
                     12: Redistribution and use in source and binary forms, with or without
                     13: modification, are permitted provided that the following conditions are met:
                     14: 
                     15:     * Redistributions of source code must retain the above copyright notice,
                     16:       this list of conditions and the following disclaimer.
                     17: 
                     18:     * Redistributions in binary form must reproduce the above copyright
                     19:       notice, this list of conditions and the following disclaimer in the
                     20:       documentation and/or other materials provided with the distribution.
                     21: 
                     22:     * Neither the name of the University of Cambridge nor the names of its
                     23:       contributors may be used to endorse or promote products derived from
                     24:       this software without specific prior written permission.
                     25: 
                     26: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
                     27: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
                     30: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     31: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     32: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     33: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     34: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     35: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     36: POSSIBILITY OF SUCH DAMAGE.
                     37: -----------------------------------------------------------------------------
                     38: */
                     39: 
                     40: 
                     41: /* This file contains a private PCRE function that converts an ordinal
                     42: character value into a UTF8 string. */
                     43: 
                     44: #ifdef HAVE_CONFIG_H
                     45: #include "config.h"
                     46: #endif
                     47: 
                     48: #include "pcre_internal.h"
                     49: 
                     50: 
                     51: /*************************************************
                     52: *       Convert character value to UTF-8         *
                     53: *************************************************/
                     54: 
                     55: /* This function takes an integer value in the range 0 - 0x7fffffff
                     56: and encodes it as a UTF-8 character in 0 to 6 bytes.
                     57: 
                     58: Arguments:
                     59:   cvalue     the character value
                     60:   buffer     pointer to buffer for result - at least 6 bytes long
                     61: 
                     62: Returns:     number of characters placed in the buffer
                     63: */
                     64: 
                     65: int
                     66: _pcre_ord2utf8(int cvalue, uschar *buffer)
                     67: {
                     68: #ifdef SUPPORT_UTF8
                     69: register int i, j;
                     70: for (i = 0; i < _pcre_utf8_table1_size; i++)
                     71:   if (cvalue <= _pcre_utf8_table1[i]) break;
                     72: buffer += i;
                     73: for (j = i; j > 0; j--)
                     74:  {
                     75:  *buffer-- = 0x80 | (cvalue & 0x3f);
                     76:  cvalue >>= 6;
                     77:  }
                     78: *buffer = _pcre_utf8_table2[i] | cvalue;
                     79: return i + 1;
                     80: #else
                     81: (void)(cvalue);  /* Keep compiler happy; this function won't ever be */
                     82: (void)(buffer);  /* called when SUPPORT_UTF8 is not defined. */
                     83: return 0;
                     84: #endif
                     85: }
                     86: 
                     87: /* End of pcre_ord2utf8.c */