mirror of
https://github.com/alliedmodders/amxmodx.git
synced 2024-12-27 15:25:36 +03:00
d4de0e6f1e
I was über lazy at first, so took libs from SM. But actually it's quite easy to compile, so let's update to latest version \o/.
138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/*************************************************
|
|
* 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) 1997-2013 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-16 character
|
|
strings. */
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
/* Generate code with 16 bit character support. */
|
|
#define COMPILE_PCRE16
|
|
|
|
#include "pcre_internal.h"
|
|
|
|
|
|
/*************************************************
|
|
* Validate a UTF-16 string *
|
|
*************************************************/
|
|
|
|
/* This function is called (optionally) at the start of compile or match, to
|
|
check that a supposed UTF-16 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.
|
|
|
|
From release 8.21 more information about the details of the error are passed
|
|
back in the returned value:
|
|
|
|
PCRE_UTF16_ERR0 No error
|
|
PCRE_UTF16_ERR1 Missing low surrogate at the end of the string
|
|
PCRE_UTF16_ERR2 Invalid low surrogate
|
|
PCRE_UTF16_ERR3 Isolated low surrogate
|
|
PCRE_UTF16_ERR4 Unused (was non-character)
|
|
|
|
Arguments:
|
|
string points to the string
|
|
length length of string, or -1 if the string is zero-terminated
|
|
errp pointer to an error position offset variable
|
|
|
|
Returns: = 0 if the string is a valid UTF-16 string
|
|
> 0 otherwise, setting the offset of the bad character
|
|
*/
|
|
|
|
int
|
|
PRIV(valid_utf)(PCRE_PUCHAR string, int length, int *erroroffset)
|
|
{
|
|
#ifdef SUPPORT_UTF
|
|
register PCRE_PUCHAR p;
|
|
register pcre_uint32 c;
|
|
|
|
if (length < 0)
|
|
{
|
|
for (p = string; *p != 0; p++);
|
|
length = p - string;
|
|
}
|
|
|
|
for (p = string; length-- > 0; p++)
|
|
{
|
|
c = *p;
|
|
|
|
if ((c & 0xf800) != 0xd800)
|
|
{
|
|
/* Normal UTF-16 code point. Neither high nor low surrogate. */
|
|
}
|
|
else if ((c & 0x0400) == 0)
|
|
{
|
|
/* High surrogate. Must be a followed by a low surrogate. */
|
|
if (length == 0)
|
|
{
|
|
*erroroffset = p - string;
|
|
return PCRE_UTF16_ERR1;
|
|
}
|
|
p++;
|
|
length--;
|
|
if ((*p & 0xfc00) != 0xdc00)
|
|
{
|
|
*erroroffset = p - string;
|
|
return PCRE_UTF16_ERR2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Isolated low surrogate. Always an error. */
|
|
*erroroffset = p - string;
|
|
return PCRE_UTF16_ERR3;
|
|
}
|
|
}
|
|
|
|
#else /* SUPPORT_UTF */
|
|
(void)(string); /* Keep picky compilers happy */
|
|
(void)(length);
|
|
(void)(erroroffset);
|
|
#endif /* SUPPORT_UTF */
|
|
|
|
return PCRE_UTF16_ERR0; /* This indicates success */
|
|
}
|
|
|
|
/* End of pcre16_valid_utf16.c */
|