219 lines
6.8 KiB
C
219 lines
6.8 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
|
|
Original API code Copyright (c) 1997-2012 University of Cambridge
|
|
New API code Copyright (c) 2016 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.
|
|
-----------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
/* Save the configured link size, which is in bytes. In 16-bit and 32-bit modes
|
|
its value gets changed by pcre2_internal.h to be in code units. */
|
|
|
|
static int configured_link_size = LINK_SIZE;
|
|
|
|
#include "pcre2_internal.h"
|
|
|
|
/* These macros are the standard way of turning unquoted text into C strings.
|
|
They allow macros like PCRE2_MAJOR to be defined without quotes, which is
|
|
convenient for user programs that want to test their values. */
|
|
|
|
#define STRING(a) # a
|
|
#define XSTRING(s) STRING(s)
|
|
|
|
|
|
/*************************************************
|
|
* Return info about what features are configured *
|
|
*************************************************/
|
|
|
|
/* If where is NULL, the length of memory required is returned.
|
|
|
|
Arguments:
|
|
what what information is required
|
|
where where to put the information
|
|
|
|
Returns: 0 if a numerical value is returned
|
|
>= 0 if a string value
|
|
PCRE2_ERROR_BADOPTION if "where" not recognized
|
|
or JIT target requested when JIT not enabled
|
|
*/
|
|
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
|
pcre2_config(uint32_t what, void *where)
|
|
{
|
|
if (where == NULL) /* Requests a length */
|
|
{
|
|
switch(what)
|
|
{
|
|
default:
|
|
return PCRE2_ERROR_BADOPTION;
|
|
|
|
case PCRE2_CONFIG_BSR:
|
|
case PCRE2_CONFIG_JIT:
|
|
case PCRE2_CONFIG_LINKSIZE:
|
|
case PCRE2_CONFIG_MATCHLIMIT:
|
|
case PCRE2_CONFIG_NEWLINE:
|
|
case PCRE2_CONFIG_PARENSLIMIT:
|
|
case PCRE2_CONFIG_RECURSIONLIMIT:
|
|
case PCRE2_CONFIG_STACKRECURSE:
|
|
case PCRE2_CONFIG_UNICODE:
|
|
return sizeof(uint32_t);
|
|
|
|
/* These are handled below */
|
|
|
|
case PCRE2_CONFIG_JITTARGET:
|
|
case PCRE2_CONFIG_UNICODE_VERSION:
|
|
case PCRE2_CONFIG_VERSION:
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (what)
|
|
{
|
|
default:
|
|
return PCRE2_ERROR_BADOPTION;
|
|
|
|
case PCRE2_CONFIG_BSR:
|
|
#ifdef BSR_ANYCRLF
|
|
*((uint32_t *)where) = PCRE2_BSR_ANYCRLF;
|
|
#else
|
|
*((uint32_t *)where) = PCRE2_BSR_UNICODE;
|
|
#endif
|
|
break;
|
|
|
|
case PCRE2_CONFIG_JIT:
|
|
#ifdef SUPPORT_JIT
|
|
*((uint32_t *)where) = 1;
|
|
#else
|
|
*((uint32_t *)where) = 0;
|
|
#endif
|
|
break;
|
|
|
|
case PCRE2_CONFIG_JITTARGET:
|
|
#ifdef SUPPORT_JIT
|
|
{
|
|
const char *v = PRIV(jit_get_target)();
|
|
return (int)(1 + ((where == NULL)?
|
|
strlen(v) : PRIV(strcpy_c8)((PCRE2_UCHAR *)where, v)));
|
|
}
|
|
#else
|
|
return PCRE2_ERROR_BADOPTION;
|
|
#endif
|
|
|
|
case PCRE2_CONFIG_LINKSIZE:
|
|
*((uint32_t *)where) = (uint32_t)configured_link_size;
|
|
break;
|
|
|
|
case PCRE2_CONFIG_MATCHLIMIT:
|
|
*((uint32_t *)where) = MATCH_LIMIT;
|
|
break;
|
|
|
|
case PCRE2_CONFIG_NEWLINE:
|
|
*((uint32_t *)where) = NEWLINE_DEFAULT;
|
|
break;
|
|
|
|
case PCRE2_CONFIG_PARENSLIMIT:
|
|
*((uint32_t *)where) = PARENS_NEST_LIMIT;
|
|
break;
|
|
|
|
case PCRE2_CONFIG_RECURSIONLIMIT:
|
|
*((uint32_t *)where) = MATCH_LIMIT_RECURSION;
|
|
break;
|
|
|
|
case PCRE2_CONFIG_STACKRECURSE:
|
|
#ifdef HEAP_MATCH_RECURSE
|
|
*((uint32_t *)where) = 0;
|
|
#else
|
|
*((uint32_t *)where) = 1;
|
|
#endif
|
|
break;
|
|
|
|
case PCRE2_CONFIG_UNICODE_VERSION:
|
|
{
|
|
#if defined SUPPORT_UNICODE
|
|
const char *v = PRIV(unicode_version);
|
|
#else
|
|
const char *v = "Unicode not supported";
|
|
#endif
|
|
return (int)(1 + ((where == NULL)?
|
|
strlen(v) : PRIV(strcpy_c8)((PCRE2_UCHAR *)where, v)));
|
|
}
|
|
break;
|
|
|
|
case PCRE2_CONFIG_UNICODE:
|
|
#if defined SUPPORT_UNICODE
|
|
*((uint32_t *)where) = 1;
|
|
#else
|
|
*((uint32_t *)where) = 0;
|
|
#endif
|
|
break;
|
|
|
|
/* The hackery in setting "v" below is to cope with the case when
|
|
PCRE2_PRERELEASE is set to an empty string (which it is for real releases).
|
|
If the second alternative is used in this case, it does not leave a space
|
|
before the date. On the other hand, if all four macros are put into a single
|
|
XSTRING when PCRE2_PRERELEASE is not empty, an unwanted space is inserted.
|
|
There are problems using an "obvious" approach like this:
|
|
|
|
XSTRING(PCRE2_MAJOR) "." XSTRING(PCRE_MINOR)
|
|
XSTRING(PCRE2_PRERELEASE) " " XSTRING(PCRE_DATE)
|
|
|
|
because, when PCRE2_PRERELEASE is empty, this leads to an attempted expansion
|
|
of STRING(). The C standard states: "If (before argument substitution) any
|
|
argument consists of no preprocessing tokens, the behavior is undefined." It
|
|
turns out the gcc treats this case as a single empty string - which is what
|
|
we really want - but Visual C grumbles about the lack of an argument for the
|
|
macro. Unfortunately, both are within their rights. As there seems to be no
|
|
way to test for a macro's value being empty at compile time, we have to
|
|
resort to a runtime test. */
|
|
|
|
case PCRE2_CONFIG_VERSION:
|
|
{
|
|
const char *v = (XSTRING(Z PCRE2_PRERELEASE)[1] == 0)?
|
|
XSTRING(PCRE2_MAJOR.PCRE2_MINOR PCRE2_DATE) :
|
|
XSTRING(PCRE2_MAJOR.PCRE2_MINOR) XSTRING(PCRE2_PRERELEASE PCRE2_DATE);
|
|
return (int)(1 + ((where == NULL)?
|
|
strlen(v) : PRIV(strcpy_c8)((PCRE2_UCHAR *)where, v)));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* End of pcre2_config.c */
|