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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (C) 2012-21 Miranda NG team (https://miranda-ng.org)
Copyright (c) 2000-08 Miranda ICQ/IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef MIM_REGEXP_H
#define MIM_REGEXP_H
#include <pcre.h>
class MRegexp16
{
pcre16 *m_pattern = nullptr;
pcre16_extra *m_extra = nullptr;
bool m_bIsValid = false;
const wchar_t *m_prevText;
int m_nMatches = 0, m_start = 0;
int m_offsets[100];
MRegexp16(const MRegexp16&); // never applied
public:
MRegexp16()
{}
MRegexp16(const wchar_t *pwszPattern)
{
compile(pwszPattern);
}
void compile(const wchar_t *pwszPattern)
{
m_bIsValid = false;
int erroffset;
const char *err;
m_pattern = ::pcre16_compile(pwszPattern, 0, &err, &erroffset, nullptr);
if (m_pattern == nullptr)
return;
m_extra = ::pcre16_study(m_pattern, 0, &err);
if (m_extra == nullptr)
return;
m_bIsValid = true;
}
~MRegexp16()
{
if (m_pattern) ::pcre16_free(m_pattern);
if (m_extra) ::pcre16_free(m_extra);
}
__forceinline bool isValid() const { return m_bIsValid; }
__forceinline int numMatches() const { return m_nMatches; }
__forceinline int getPos() const { return m_offsets[0]; }
__forceinline int getLength() const { return m_offsets[1] - m_offsets[0]; }
CMStringW getMatch()
{
return CMStringW(m_prevText + getPos(), getLength());
}
CMStringW getGroup(int i)
{
if (i >= m_nMatches)
return L"";
return CMStringW(m_prevText + m_offsets[i*2], m_offsets[i*2 + 1] - m_offsets[i*2]);
}
int match(const wchar_t *pwszText)
{
return m_nMatches = ::pcre16_exec(m_pattern, m_extra, m_prevText = pwszText, (int)mir_wstrlen(pwszText), 0, 0, m_offsets, _countof(m_offsets));
}
int nextMatch(const wchar_t *pwszText)
{
m_nMatches = ::pcre16_exec(m_pattern, m_extra, m_prevText = pwszText, (int)mir_wstrlen(pwszText), m_start, 0, m_offsets, _countof(m_offsets));
m_start = (m_nMatches >= 0) ? m_offsets[1] : 0;
return m_nMatches;
}
};
#endif // MIM_REGEXP_H
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