c3dsparser.cpp

#include "c3dsparser.h"

C3dsParser::C3dsParser(string filename) :
    m_file(0)
{
        m_currentHeader.length = 0;
        m_currentHeader.chunkId = 0;
        m_file = fopen(filename.c_str(), "rb");
        if (!m_file) printf("Unable to open 3ds file\n");
        fseek(m_file, 0, SEEK_END);
        m_fileLength = ftell(m_file);
        reset();
}

C3dsParser::~C3dsParser(){
        if ( m_file != 0 ) fclose(m_file);
}

void C3dsParser::reset()
{
    m_currentHeader.length = 0;
    m_currentHeader.chunkId = 0;
    fseek(m_file, 0, SEEK_SET);
}

void  C3dsParser::enterChunk(){
        m_currentHeader.offset = ftell(m_file);
        fread(&m_currentHeader, 6, 1, m_file);
}

unsigned short C3dsParser::getChunkId(void){
        return m_currentHeader.chunkId;
}

unsigned int C3dsParser::getChunkLength(void){
        return m_currentHeader.length;
}

long int C3dsParser::getChunkOffset(void){
    return m_currentHeader.offset;
}

void C3dsParser::skipChunk(void){
        fseek(m_file, m_currentHeader.length + m_currentHeader.offset, SEEK_SET);
}

void C3dsParser::skipStrData(void){
        while ( fgetc(m_file) != '\0' ){}
}

unsigned int C3dsParser::getStrDataLength(void){
        long int tmp = ftell(m_file);
        skipStrData();
        unsigned int length = ftell(m_file) - tmp;
        fseek(m_file, tmp, SEEK_SET);
        return length; // includes null byte
}

char* C3dsParser::extractStrData(void){
        int len = getStrDataLength();
        char* str = new char[len];
        fread(str, sizeof(unsigned char), len, m_file);
        return str;
}

bool C3dsParser::eof(void){
        return ftell(m_file) >= m_fileLength;
}