171 lines
5.1 KiB
C
171 lines
5.1 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) 2014 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
|
|
|
|
#include "pcre2_internal.h"
|
|
|
|
|
|
/* FIXME: this is currently a placeholder function */
|
|
|
|
/*************************************************
|
|
* Free compiled code *
|
|
*************************************************/
|
|
|
|
PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
|
|
pcre2_code_free(pcre2_code *code)
|
|
{
|
|
if (code != NULL) code->memctl.free(code, code->memctl.memory_data);
|
|
}
|
|
|
|
|
|
|
|
/*************************************************
|
|
* Compile a Regular Expression *
|
|
*************************************************/
|
|
|
|
/* This function reads a regular expression in the form of a string and returns
|
|
a pointer to a block of store holding a compiled version of the expression.
|
|
|
|
Arguments:
|
|
pattern the regular expression
|
|
patlen the length of the pattern, or < 0 for zero-terminated
|
|
options option bits
|
|
errorcode pointer to error code variable (positive error code)
|
|
erroroffset pointer for offset in pattern where error was detected
|
|
ccontext points to a compile context or is NULL
|
|
|
|
Returns: pointer to compiled data block, or NULL on error,
|
|
with errorcode and erroroffset set
|
|
*/
|
|
|
|
/* FIXME: this is currently a placeholder function */
|
|
|
|
PCRE2_EXP_DEFN pcre2_code * PCRE2_CALL_CONVENTION
|
|
pcre2_compile(PCRE2_SPTR pattern, int patlen, uint32_t options, int *errorcode,
|
|
size_t *erroroffset, pcre2_compile_context *ccontext)
|
|
{
|
|
pcre2_compile_context default_context;
|
|
pcre2_code *c = NULL;
|
|
|
|
patlen = patlen;
|
|
|
|
if (ccontext == NULL)
|
|
{
|
|
PRIV(compile_context_init)(&default_context, TRUE);
|
|
ccontext = &default_context;
|
|
}
|
|
|
|
/* Fudge while testing pcre2test. */
|
|
|
|
*erroroffset = 0;
|
|
|
|
if (pattern[0] == 'Y')
|
|
{
|
|
PCRE2_UCHAR *n;
|
|
int lennumber = (PCRE2_CODE_UNIT_WIDTH == 8)? 2 : 1;
|
|
size_t size = sizeof(pcre2_real_code) +
|
|
(12 + 3*lennumber)*(PCRE2_CODE_UNIT_WIDTH/8) + CU2BYTES(20);
|
|
c = ccontext->memctl.malloc(size, NULL);
|
|
c->memctl = ccontext->memctl;
|
|
c->magic_number = MAGIC_NUMBER;
|
|
c->size = size;
|
|
c->compile_options = options;
|
|
c->pattern_options = 0;
|
|
c->flags = PCRE2_CODE_UNIT_WIDTH/8;
|
|
c->limit_match = 0;
|
|
c->limit_recursion = 0;
|
|
c->max_lookbehind = 0;
|
|
c->minlength = 3;
|
|
c->top_bracket = 5;
|
|
c->top_backref = 1;
|
|
c->bsr_convention = ccontext->bsr_convention;
|
|
c->newline_convention = ccontext->newline_convention;
|
|
c->name_count = 3;
|
|
c->name_entry_size = 4 + lennumber;
|
|
|
|
n = (PCRE2_UCHAR *)((char *)c + sizeof(pcre2_real_code));
|
|
|
|
if (lennumber == 2) *n++ = 0 ;
|
|
*n++ = 1;
|
|
*n++ = 'x'; *n++ = 'x'; *n++ = 'x'; *n++ = 0;
|
|
|
|
if (lennumber == 2) *n++ = 0 ;
|
|
*n++ = 2;
|
|
*n++ = 'y'; *n++ = 'y'; *n++ = 'y'; *n++ = 0;
|
|
|
|
if (lennumber == 2) *n++ = 0 ;
|
|
*n++ = 3;
|
|
*n++ = 'y'; *n++ = 'y'; *n++ = 'y'; *n++ = 0;
|
|
|
|
|
|
*n++ = OP_CHAR;
|
|
*n++ = 'x';
|
|
*n++ = OP_CHARI;
|
|
*n++ = 'Y';
|
|
|
|
*n++ = OP_PROP;
|
|
*n++ = PT_SC;
|
|
*n++ = 0;
|
|
|
|
*n++ = OP_DNRREF;
|
|
*n++ = 0;
|
|
*n++ = 0;
|
|
*n++ = 0;
|
|
*n++ = 0;
|
|
|
|
*n++ = OP_END;
|
|
|
|
|
|
}
|
|
|
|
else
|
|
{
|
|
*errorcode = 1;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
/* End of pcre2_compile.c */
|