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Annotation of win32/pcre/pcre_ord2utf8.c, revision 1.4

1.1       misha       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
1.3       misha       9:            Copyright (c) 1997-2012 University of Cambridge
1.1       misha      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: 
1.4     ! misha      48: #define COMPILE_PCRE8
        !            49: 
1.1       misha      50: #include "pcre_internal.h"
                     51: 
                     52: /*************************************************
                     53: *       Convert character value to UTF-8         *
                     54: *************************************************/
                     55: 
1.3       misha      56: /* This function takes an integer value in the range 0 - 0x10ffff
1.4     ! misha      57: and encodes it as a UTF-8 character in 1 to 4 pcre_uchars.
1.1       misha      58: 
                     59: Arguments:
                     60:   cvalue     the character value
1.3       misha      61:   buffer     pointer to buffer for result - at least 6 pcre_uchars long
1.1       misha      62: 
                     63: Returns:     number of characters placed in the buffer
                     64: */
                     65: 
1.4     ! misha      66: unsigned
1.1       misha      67: int
1.3       misha      68: PRIV(ord2utf)(pcre_uint32 cvalue, pcre_uchar *buffer)
1.1       misha      69: {
1.3       misha      70: #ifdef SUPPORT_UTF
                     71: 
1.1       misha      72: register int i, j;
1.3       misha      73: 
                     74: for (i = 0; i < PRIV(utf8_table1_size); i++)
                     75:   if ((int)cvalue <= PRIV(utf8_table1)[i]) break;
1.1       misha      76: buffer += i;
                     77: for (j = i; j > 0; j--)
                     78:  {
                     79:  *buffer-- = 0x80 | (cvalue & 0x3f);
                     80:  cvalue >>= 6;
                     81:  }
1.3       misha      82: *buffer = PRIV(utf8_table2)[i] | cvalue;
1.1       misha      83: return i + 1;
1.3       misha      84: 
1.1       misha      85: #else
1.3       misha      86: 
1.2       misha      87: (void)(cvalue);  /* Keep compiler happy; this function won't ever be */
1.3       misha      88: (void)(buffer);  /* called when SUPPORT_UTF is not defined. */
1.2       misha      89: return 0;
1.3       misha      90: 
1.2       misha      91: #endif
1.1       misha      92: }
                     93: 
                     94: /* End of pcre_ord2utf8.c */