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Annotation of embedaddon/php/ext/pcre/pcrelib/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: #include "config.h"
                     45: 
                     46: #include "pcre_internal.h"
                     47: 
                     48: 
                     49: /*************************************************
                     50: *       Convert character value to UTF-8         *
                     51: *************************************************/
                     52: 
                     53: /* This function takes an integer value in the range 0 - 0x7fffffff
                     54: and encodes it as a UTF-8 character in 0 to 6 bytes.
                     55: 
                     56: Arguments:
                     57:   cvalue     the character value
                     58:   buffer     pointer to buffer for result - at least 6 bytes long
                     59: 
                     60: Returns:     number of characters placed in the buffer
                     61: */
                     62: 
                     63: int
                     64: _pcre_ord2utf8(int cvalue, uschar *buffer)
                     65: {
                     66: #ifdef SUPPORT_UTF8
                     67: register int i, j;
                     68: for (i = 0; i < _pcre_utf8_table1_size; i++)
                     69:   if (cvalue <= _pcre_utf8_table1[i]) break;
                     70: buffer += i;
                     71: for (j = i; j > 0; j--)
                     72:  {
                     73:  *buffer-- = 0x80 | (cvalue & 0x3f);
                     74:  cvalue >>= 6;
                     75:  }
                     76: *buffer = _pcre_utf8_table2[i] | cvalue;
                     77: return i + 1;
                     78: #else
                     79: (void)(cvalue);  /* Keep compiler happy; this function won't ever be */
                     80: (void)(buffer);  /* called when SUPPORT_UTF8 is not defined. */
                     81: return 0;
                     82: #endif
                     83: }
                     84: 
                     85: /* End of pcre_ord2utf8.c */