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/*
* Copyright 2007-2021 CM4all GmbH
* All rights reserved.
*
* author: Max Kellermann <mk@cm4all.com>
*
* 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.
*
* 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
* FOUNDATION 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.
*/
#include "UniqueRegex.hxx"
#include "Error.hxx"
#include <stdio.h>
void
UniqueRegex::Compile(const char *pattern, bool anchored, bool capture,
bool caseless)
{
constexpr int default_options = PCRE2_DOTALL|PCRE2_NO_AUTO_CAPTURE;
uint32_t options = default_options;
if (anchored)
options |= PCRE2_ANCHORED;
if (capture)
options &= ~PCRE2_NO_AUTO_CAPTURE;
if (caseless)
options |= PCRE2_CASELESS;
int error_number;
PCRE2_SIZE error_offset;
re = pcre2_compile_8(PCRE2_SPTR8(pattern),
PCRE2_ZERO_TERMINATED, options,
&error_number, &error_offset,
nullptr);
if (re == nullptr) {
char msg[256];
snprintf(msg, sizeof(msg), "Error in regex at offset %zu",
error_offset);
throw Pcre::MakeError(error_number, msg);
}
pcre2_jit_compile_8(re, PCRE2_JIT_COMPLETE);
if (int n; capture &&
pcre2_pattern_info_8(re, PCRE2_INFO_CAPTURECOUNT, &n) == 0)
n_capture = n;
}