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Diffstat (limited to 'crawl-ref/source/util/pcre/pcre_valid_utf8.c')
| -rw-r--r-- | crawl-ref/source/util/pcre/pcre_valid_utf8.c | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/crawl-ref/source/util/pcre/pcre_valid_utf8.c b/crawl-ref/source/util/pcre/pcre_valid_utf8.c deleted file mode 100644 index bc3bc8f3d4..0000000000 --- a/crawl-ref/source/util/pcre/pcre_valid_utf8.c +++ /dev/null @@ -1,162 +0,0 @@ -/************************************************* -* Perl-Compatible Regular Expressions * -*************************************************/ - -/* PCRE is a library of functions to support regular expressions whose syntax -and semantics are as close as possible to those of the Perl 5 language. - - Written by Philip Hazel - Copyright (c) 1997-2008 University of Cambridge - ------------------------------------------------------------------------------ -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - - * Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - * Neither the name of the University of Cambridge nor the names of its - contributors may be used to endorse or promote products derived from - this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. ------------------------------------------------------------------------------ -*/ - - -/* This module contains an internal function for validating UTF-8 character -strings. */ - - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "pcre_internal.h" - - -/************************************************* -* Validate a UTF-8 string * -*************************************************/ - -/* This function is called (optionally) at the start of compile or match, to -validate that a supposed UTF-8 string is actually valid. The early check means -that subsequent code can assume it is dealing with a valid string. The check -can be turned off for maximum performance, but the consequences of supplying -an invalid string are then undefined. - -Originally, this function checked according to RFC 2279, allowing for values in -the range 0 to 0x7fffffff, up to 6 bytes long, but ensuring that they were in -the canonical format. Once somebody had pointed out RFC 3629 to me (it -obsoletes 2279), additional restrictions were applied. The values are now -limited to be between 0 and 0x0010ffff, no more than 4 bytes long, and the -subrange 0xd000 to 0xdfff is excluded. - -Arguments: - string points to the string - length length of string, or -1 if the string is zero-terminated - -Returns: < 0 if the string is a valid UTF-8 string - >= 0 otherwise; the value is the offset of the bad byte -*/ - -int -_pcre_valid_utf8(const uschar *string, int length) -{ -#ifdef SUPPORT_UTF8 -register const uschar *p; - -if (length < 0) - { - for (p = string; *p != 0; p++); - length = p - string; - } - -for (p = string; length-- > 0; p++) - { - register int ab; - register int c = *p; - if (c < 128) continue; - if (c < 0xc0) return p - string; - ab = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ - if (length < ab || ab > 3) return p - string; - length -= ab; - - /* Check top bits in the second byte */ - if ((*(++p) & 0xc0) != 0x80) return p - string; - - /* Check for overlong sequences for each different length, and for the - excluded range 0xd000 to 0xdfff. */ - - switch (ab) - { - /* Check for xx00 000x (overlong sequence) */ - - case 1: - if ((c & 0x3e) == 0) return p - string; - continue; /* We know there aren't any more bytes to check */ - - /* Check for 1110 0000, xx0x xxxx (overlong sequence) or - 1110 1101, 1010 xxxx (0xd000 - 0xdfff) */ - - case 2: - if ((c == 0xe0 && (*p & 0x20) == 0) || - (c == 0xed && *p >= 0xa0)) - return p - string; - break; - - /* Check for 1111 0000, xx00 xxxx (overlong sequence) or - greater than 0x0010ffff (f4 8f bf bf) */ - - case 3: - if ((c == 0xf0 && (*p & 0x30) == 0) || - (c > 0xf4 ) || - (c == 0xf4 && *p > 0x8f)) - return p - string; - break; - -#if 0 - /* These cases can no longer occur, as we restrict to a maximum of four - bytes nowadays. Leave the code here in case we ever want to add an option - for longer sequences. */ - - /* Check for 1111 1000, xx00 0xxx */ - case 4: - if (c == 0xf8 && (*p & 0x38) == 0) return p - string; - break; - - /* Check for leading 0xfe or 0xff, and then for 1111 1100, xx00 00xx */ - case 5: - if (c == 0xfe || c == 0xff || - (c == 0xfc && (*p & 0x3c) == 0)) return p - string; - break; -#endif - - } - - /* Check for valid bytes after the 2nd, if any; all must start 10 */ - while (--ab > 0) - { - if ((*(++p) & 0xc0) != 0x80) return p - string; - } - } -#endif - -return -1; -} - -/* End of pcre_valid_utf8.c */ |