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dbcfile.cpp
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dbcfile.cpp
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#define _CRT_SECURE_NO_DEPRECATE
#include "dbcfile.h"
#include "loadlib/loadlib.h"
DBCFile::DBCFile(const std::string &filename):
filename(filename),
data(0)
{
}
bool DBCFile::open()
{
HANDLE fileHandle = 0;
if (!OpenNewestFile(filename.c_str(), &fileHandle))
return false;
char header[4];
unsigned int na,nb,es,ss;
if (!SFileReadFile(fileHandle, header, 4, NULL, NULL)) // Magic header
{
SFileCloseFile(fileHandle);
return false;
}
if (header[0]!='W' || header[1]!='D' || header[2]!='B' || header[3]!='C')
{
SFileCloseFile(fileHandle);
return false;
}
if (!SFileReadFile(fileHandle, &na, 4, NULL, NULL)) // Number of records
{
SFileCloseFile(fileHandle);
return false;
}
if (!SFileReadFile(fileHandle, &nb, 4, NULL, NULL)) // Number of fields
{
SFileCloseFile(fileHandle);
return false;
}
if (!SFileReadFile(fileHandle, &es, 4, NULL, NULL)) // Size of a record
{
SFileCloseFile(fileHandle);
return false;
}
if (!SFileReadFile(fileHandle, &ss, 4, NULL, NULL)) // String size
{
SFileCloseFile(fileHandle);
return false;
}
recordSize = es;
recordCount = na;
fieldCount = nb;
stringSize = ss;
if (fieldCount * 4 != recordSize)
{
SFileCloseFile(fileHandle);
return false;
}
data = new unsigned char[recordSize*recordCount+stringSize];
stringTable = data + recordSize*recordCount;
size_t data_size = recordSize*recordCount+stringSize;
if (!SFileReadFile(fileHandle, data, data_size, NULL, NULL))
{
SFileCloseFile(fileHandle);
return false;
}
SFileCloseFile(fileHandle);
return true;
}
DBCFile::~DBCFile()
{
delete [] data;
}
DBCFile::Record DBCFile::getRecord(size_t id)
{
assert(data);
return Record(*this, data + id*recordSize);
}
size_t DBCFile::getMaxId()
{
assert(data);
size_t maxId = 0;
for(size_t i = 0; i < getRecordCount(); ++i)
{
if(maxId < getRecord(i).getUInt(0))
maxId = getRecord(i).getUInt(0);
}
return maxId;
}
DBCFile::Iterator DBCFile::begin()
{
assert(data);
return Iterator(*this, data);
}
DBCFile::Iterator DBCFile::end()
{
assert(data);
return Iterator(*this, stringTable);
}