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/*
* Quackle -- Crossword game artificial intelligence and analysis tool
* Copyright (C) 2005-2014 Jason Katz-Brown and John O'Laughlin.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <iostream>
#include <fstream>
#include "datamanager.h"
#include "lexiconparameters.h"
#include "uv.h"
using namespace Quackle;
class Quackle::V0LexiconInterpreter : public LexiconInterpreter
{
virtual void loadDawg(ifstream &file, LexiconParameters &lexparams)
{
int i = 0;
file.unget(); // version 0 doesn't have a version byte...it's just the node byte which is always set to 0
while (!file.eof())
{
file.read((char*)(lexparams.m_dawg) + i, 7);
i += 7;
}
}
virtual void loadGaddag(ifstream &file, LexiconParameters &lexparams)
{
int i = 0;
file.unget();
while (!file.eof())
{
file.read((char*)(lexparams.m_gaddag) + i, 4);
i += 4;
}
}
virtual void dawgAt(const unsigned char *dawg, int index, unsigned int &p, Letter &letter, bool &t, bool &lastchild, bool &british, int &playability) const
{
index *= 7;
p = (dawg[index] << 16) + (dawg[index + 1] << 8) + (dawg[index + 2]);
letter = dawg[index + 3];
t = (letter & 32) != 0;
lastchild = (letter & 64) != 0;
british = !(letter & 128);
letter = (letter & 31) + QUACKLE_FIRST_LETTER;
playability = (dawg[index + 4] << 16) + (dawg[index + 5] << 8) + (dawg[index + 6]);
}
virtual int versionNumber() const { return 0; }
};
class Quackle::V1LexiconInterpreter : public LexiconInterpreter
{
virtual void loadDawg(ifstream &file, LexiconParameters &lexparams)
{
int i = 0;
unsigned char bytes[3];
file.read(lexparams.m_hash, sizeof(lexparams.m_hash));
file.read((char*)bytes, 3);
lexparams.m_wordcount = (bytes[0] << 16) | (bytes[1] << 8) | bytes[2];
while (!file.eof())
{
file.read((char*)(lexparams.m_dawg) + i, 7);
i += 7;
}
}
virtual void loadGaddag(ifstream &file, LexiconParameters &lexparams)
{
char hash[16];
file.read(hash, sizeof(hash));
if (memcmp(hash, lexparams.m_hash, sizeof(hash)))
{
lexparams.unloadGaddag(); // don't use a mismatched gaddag
return;
}
int i = 0;
while (!file.eof())
{
file.read((char*)(lexparams.m_gaddag) + i, 4);
i += 4;
}
}
virtual void dawgAt(const unsigned char *dawg, int index, unsigned int &p, Letter &letter, bool &t, bool &lastchild, bool &british, int &playability) const
{
index *= 7;
p = (dawg[index] << 16) + (dawg[index + 1] << 8) + (dawg[index + 2]);
letter = dawg[index + 3];
t = (p != 0);
lastchild = ((letter & 64) != 0);
british = !(letter & 128);
letter = (letter & 63) + QUACKLE_FIRST_LETTER;
playability = (dawg[index + 4] << 16) + (dawg[index + 5] << 8) + (dawg[index + 6]);
}
virtual int versionNumber() const { return 1; }
};
LexiconParameters::LexiconParameters()
: m_dawg(NULL), m_gaddag(NULL), m_interpreter(NULL), m_wordcount(0)
{
memset(m_hash, 0, sizeof(m_hash));
}
LexiconParameters::~LexiconParameters()
{
unloadAll();
}
void LexiconParameters::unloadAll()
{
unloadDawg();
unloadGaddag();
}
void LexiconParameters::unloadDawg()
{
delete[] m_dawg;
m_dawg = NULL;
delete m_interpreter;
}
void LexiconParameters::unloadGaddag()
{
delete[] m_gaddag;
m_gaddag = NULL;
}
void LexiconParameters::loadDawg(const string &filename)
{
unloadDawg();
ifstream file(filename.c_str(), ios::in | ios::binary);
if (!file.is_open())
{
UVcout << "couldn't open dawg " << filename.c_str() << endl;
return;
}
char versionByte = file.get();
switch(versionByte)
{
case 0:
m_interpreter = new V0LexiconInterpreter();
break;
case 1:
m_interpreter = new V1LexiconInterpreter();
break;
default:
UVcout << "couldn't open dawg " << filename.c_str() << endl;
return;
}
m_dawg = new unsigned char[7000000];
m_interpreter->loadDawg(file, *this);
}
void LexiconParameters::loadGaddag(const string &filename)
{
unloadGaddag();
ifstream file(filename.c_str(), ios::in | ios::binary);
if (!file.is_open())
{
UVcout << "couldn't open gaddag " << filename.c_str() << endl;
UVcout << "Performance without gaddag won't be quite so awesome." << endl;
return;
}
char versionByte = file.get();
if (versionByte != m_interpreter->versionNumber())
return;
m_gaddag = new unsigned char[40000000];
m_interpreter->loadGaddag(file, *this);
}
string LexiconParameters::findDictionaryFile(const string &lexicon)
{
return DataManager::self()->findDataFile("lexica", lexicon);
}
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