add stringid for mapping between strings and ints

This commit is contained in:
Danny Robson 2014-05-26 17:11:07 +10:00
parent 622d052e5d
commit eb05c7622e
5 changed files with 148 additions and 1 deletions

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@ -137,6 +137,8 @@ UTIL_FILES = \
stream.hpp \ stream.hpp \
string.cpp \ string.cpp \
string.hpp \ string.hpp \
stringid.cpp \
stringid.hpp \
time.cpp \ time.cpp \
time.hpp \ time.hpp \
types.hpp \ types.hpp \

61
stringid.cpp Normal file
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@ -0,0 +1,61 @@
/*
* This file is part of libgim.
*
* libgim 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 3 of the License, or (at your option) any later
* version.
*
* libgim 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 libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2014 Danny Robson <danny@nerdcruft.net>
*/
#include "stringid.hpp"
#include "raii.hpp"
#include <stdexcept>
#include <mutex>
using util::stringid;
//-----------------------------------------------------------------------------
stringid::id_t
stringid::add (const std::string key) {
auto pos = m_map.find (key);
if (pos != m_map.end ())
throw std::invalid_argument ("duplicate stringid key");
static std::mutex s_lock;
std::lock_guard<std::mutex> raii (s_lock);
id_t id = m_map.size ();
m_map[key] = id;
return id;
}
//-----------------------------------------------------------------------------
stringid::id_t
stringid::find (const std::string &key) const {
auto pos = m_map.find (key);
if (pos == m_map.end ())
throw std::out_of_range ("invalid stringid key");
return pos->second;
}
//-----------------------------------------------------------------------------
void
stringid::clear (void) {
m_map.clear ();
}

41
stringid.hpp Normal file
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@ -0,0 +1,41 @@
/*
* This file is part of libgim.
*
* libgim 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 3 of the License, or (at your option) any later
* version.
*
* libgim 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 libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2014 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_STRINGID_HPP
#define __UTIL_STRINGID_HPP
#include <map>
#include <string>
namespace util {
class stringid {
public:
typedef unsigned id_t;
id_t add (std::string);
id_t find (const std::string&) const;
void clear (void);
private:
std::map<const std::string, id_t> m_map;
};
}
#endif

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@ -21,9 +21,10 @@ TEST_BIN = \
range \ range \
region \ region \
ripemd \ ripemd \
signal \
sha1 \ sha1 \
sha2 \ sha2 \
signal \
stringid \
version version
AM_DEFAULT_SOURCE_EXT = .cpp AM_DEFAULT_SOURCE_EXT = .cpp

42
test/stringid.cpp Normal file
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@ -0,0 +1,42 @@
/*
* This file is part of libgim.
*
* libgim 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 3 of the License, or (at your option) any later
* version.
*
* libgim 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 libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2014 Danny Robson <danny@nerdcruft.net>
*/
#include "../stringid.hpp"
#include "../debug.hpp"
#include <cstdlib>
#include <stdexcept>
int
main (int, char**) {
util::stringid map;
CHECK_THROWS (std::out_of_range, map.find ("invalid"));
auto id1 = map.add ("first");
CHECK_EQ (id1, map.find ("first"));
CHECK_THROWS (std::out_of_range, map.find ("invalid"));
auto id2 = map.add ("second");
CHECK_EQ (id1 + 1, id2);
CHECK_EQ (id1, map.find ("first"));
return EXIT_SUCCESS;
}