1/************************************************* 2* Perl-Compatible Regular Expressions * 3*************************************************/ 4 5/* PCRE is a library of functions to support regular expressions whose syntax 6and semantics are as close as possible to those of the Perl 5 language. 7 8 Written by Philip Hazel 9 Copyright (c) 1997-2012 University of Cambridge 10 11----------------------------------------------------------------------------- 12Redistribution and use in source and binary forms, with or without 13modification, 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 26THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 27AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 30LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36POSSIBILITY OF SUCH DAMAGE. 37----------------------------------------------------------------------------- 38*/ 39 40 41/* This file contains a private PCRE function that converts an ordinal 42character 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 - 0x10ffff 56and encodes it as a UTF-8 character in 1 to 6 pcre_uchars. 57 58Arguments: 59 cvalue the character value 60 buffer pointer to buffer for result - at least 6 pcre_uchars long 61 62Returns: number of characters placed in the buffer 63*/ 64 65int 66PRIV(ord2utf)(pcre_uint32 cvalue, pcre_uchar *buffer) 67{ 68#ifdef SUPPORT_UTF 69 70register int i, j; 71 72/* Checking invalid cvalue character, encoded as invalid UTF-16 character. 73Should never happen in practice. */ 74if ((cvalue & 0xf800) == 0xd800 || cvalue >= 0x110000) 75 cvalue = 0xfffe; 76 77for (i = 0; i < PRIV(utf8_table1_size); i++) 78 if ((int)cvalue <= PRIV(utf8_table1)[i]) break; 79buffer += i; 80for (j = i; j > 0; j--) 81 { 82 *buffer-- = 0x80 | (cvalue & 0x3f); 83 cvalue >>= 6; 84 } 85*buffer = PRIV(utf8_table2)[i] | cvalue; 86return i + 1; 87 88#else 89 90(void)(cvalue); /* Keep compiler happy; this function won't ever be */ 91(void)(buffer); /* called when SUPPORT_UTF is not defined. */ 92return 0; 93 94#endif 95} 96 97/* End of pcre_ord2utf8.c */ 98