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#include "TargetCorpus.h"
#include <fstream>
#include <string>
#include <cstdlib>
#include <cstring>
namespace
{
const int LINE_MAX_LENGTH = 10000;
} // namespace
using namespace std;
TargetCorpus::TargetCorpus()
: m_array(NULL),
m_sentenceEnd(NULL),
m_vcb(),
m_size(0),
m_sentenceCount(0) {}
TargetCorpus::~TargetCorpus()
{
free(m_array);
free(m_sentenceEnd);
}
void TargetCorpus::Create(const string& fileName )
{
ifstream textFile;
char line[LINE_MAX_LENGTH];
// count the number of words first;
textFile.open(fileName.c_str());
if (!textFile) {
cerr << "no such file or directory " << fileName << endl;
exit(1);
}
istream *fileP = &textFile;
m_size = 0;
m_sentenceCount = 0;
while(!fileP->eof()) {
SAFE_GETLINE((*fileP), line, LINE_MAX_LENGTH, '\n');
if (fileP->eof()) break;
vector< WORD_ID > words = m_vcb.Tokenize( line );
m_size += words.size();
m_sentenceCount++;
}
textFile.close();
cerr << m_size << " words" << endl;
// allocate memory
m_array = (WORD_ID*) calloc( sizeof( WORD_ID ), m_size );
m_sentenceEnd = (INDEX*) calloc( sizeof( INDEX ), m_sentenceCount );
if (m_array == NULL) {
cerr << "cannot allocate memory to m_array" << endl;
exit(1);
}
if (m_sentenceEnd == NULL) {
cerr << "cannot allocate memory to m_sentenceEnd" << endl;
exit(1);
}
// fill the array
int wordIndex = 0;
int sentenceId = 0;
textFile.open(fileName.c_str());
if (!textFile) {
cerr << "no such file or directory " << fileName << endl;
exit(1);
}
fileP = &textFile;
while(!fileP->eof()) {
SAFE_GETLINE((*fileP), line, LINE_MAX_LENGTH, '\n');
if (fileP->eof()) break;
vector< WORD_ID > words = m_vcb.Tokenize( line );
vector< WORD_ID >::const_iterator i;
for( i=words.begin(); i!=words.end(); i++) {
m_array[ wordIndex++ ] = *i;
}
m_sentenceEnd[ sentenceId++ ] = wordIndex-1;
}
textFile.close();
cerr << "done reading " << wordIndex << " words, " << sentenceId << " sentences." << endl;
}
WORD TargetCorpus::GetWordFromId( const WORD_ID id ) const
{
return m_vcb.GetWord( id );
}
WORD TargetCorpus::GetWord( INDEX sentence, int word ) const
{
return m_vcb.GetWord( GetWordId( sentence, word ) );
}
WORD_ID TargetCorpus::GetWordId( INDEX sentence, int word ) const
{
if (sentence == 0) {
return m_array[ word ];
}
return m_array[ m_sentenceEnd[ sentence-1 ] + 1 + word ] ;
}
char TargetCorpus::GetSentenceLength( INDEX sentence ) const
{
if (sentence == 0) {
return (char) m_sentenceEnd[ 0 ]+1;
}
return (char) ( m_sentenceEnd[ sentence ] - m_sentenceEnd[ sentence-1 ] );
}
void TargetCorpus::Save(const string& fileName ) const
{
FILE *pFile = fopen ( (fileName + ".tgt").c_str() , "w" );
if (pFile == NULL) {
cerr << "Cannot open " << fileName << endl;
exit(1);
}
fwrite( &m_size, sizeof(INDEX), 1, pFile );
fwrite( m_array, sizeof(WORD_ID), m_size, pFile ); // corpus
fwrite( &m_sentenceCount, sizeof(INDEX), 1, pFile );
fwrite( m_sentenceEnd, sizeof(INDEX), m_sentenceCount, pFile); // sentence index
fclose( pFile );
m_vcb.Save( fileName + ".tgt-vcb" );
}
void TargetCorpus::Load(const string& fileName )
{
FILE *pFile = fopen ( (fileName + ".tgt").c_str() , "r" );
if (pFile == NULL) {
cerr << "Cannot open " << fileName << endl;
exit(1);
}
cerr << "loading from " << fileName << ".tgt" << endl;
fread( &m_size, sizeof(INDEX), 1, pFile );
cerr << "words in corpus: " << m_size << endl;
m_array = (WORD_ID*) calloc( sizeof(WORD_ID), m_size );
if (m_array == NULL) {
cerr << "cannot allocate memory to m_array" << endl;
exit(1);
}
fread( m_array, sizeof(WORD_ID), m_size, pFile ); // corpus
fread( &m_sentenceCount, sizeof(INDEX), 1, pFile );
cerr << "sentences in corpus: " << m_sentenceCount << endl;
m_sentenceEnd = (INDEX*) calloc( sizeof(INDEX), m_sentenceCount );
if (m_sentenceEnd == NULL) {
cerr << "cannot allocate memory to m_sentenceEnd" << endl;
exit(1);
}
fread( m_sentenceEnd, sizeof(INDEX), m_sentenceCount, pFile); // sentence index
fclose( pFile );
m_vcb.Load( fileName + ".tgt-vcb" );
}
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