ref: 3bdb704dc4d46e170deaf9d3d3c7fa3dbacd3c98
dir: /music/pokeredmusicdisasm/Parser.cpp/
#include <sstream>
#include "Parser.h"
using namespace std;
// Constructors
Parser::Parser()
{
rawBytes = 0;
fileLength = 0;
filePos = 0;
stop = false;
stopAddress = 0;
force = false;
}
Parser::Parser(std::string filename)
{
rawBytes = 0;
fileLength = 0;
filePos = 0;
stop = false;
stopAddress = 0;
force = false;
SetFilename(filename);
}
// Deconstructors
Parser::~Parser()
{
// Clear out temporary buffer
delete[] rawBytes;
// Clear out parsed buffer
for(unsigned int i = 0; i < parsedBytes.size(); i++)
{
delete parsedBytes[i];
}
}
// Getters / Setters
string Parser::GetFilename()
{
return filename;
}
void Parser::SetFilename(std::string value)
{
filename = value;
Read();
}
unsigned int Parser::GetStopAddress()
{
return stopAddress;
}
void Parser::SetStopAddress(unsigned int value)
{
stopAddress = value;
}
bool Parser::GetForce()
{
return force;
}
void Parser::SetForce(bool value)
{
force = value;
}
string Parser::GetParsedAsm()
{
string tmpStr;
for(unsigned int i = 0; i < parsedString.size(); i++)
{
// Ensure each line isn't already a new-line, this prevents double or tripple empty lines from piling up
if(parsedString[i] != "\n") tmpStr += parsedString[i] + "\n";
else tmpStr += parsedString[i];
}
return tmpStr;
}
// File Operations
// Absolutely no error checking at all - likely needs to be done at somepoint
void Parser::Read()
{
// open File
fstream tmpFile(filename, ios_base::in | ios_base::binary);
// Get Length
tmpFile.seekg(0, ios::end);
fileLength = tmpFile.tellg();
tmpFile.seekg(0, ios::beg);
// Allocate proper memory
rawBytes = new char[fileLength];
// Read filedata
tmpFile.read(rawBytes, fileLength);
tmpFile.close();
rawBytesFixed = (unsigned char*)rawBytes;
}
// Code Operations
void Parser::Parse(unsigned int offset)
{
filePos = offset;
ParseNext();
}
template<class T>
bool Parser::ParseData(unsigned int& pos, bool reado)
{
// Create the class to use if correct and a dummy class for validating
T* tmpC = 0;
T dummy;
// If the bytes are this data type then create and save it
if(dummy.IsValid(&rawBytesFixed[pos]))
{
// Ensure this whole opperation isn't read-only (just peeking)
if(!reado)
{
// Initialize the class
tmpC = new T(&rawBytesFixed[pos]);
// Push it onto the stack and it's assembly generation onto the output class
parsedBytes.push_back(tmpC); //
parsedString.push_back(tmpC->GenAsm());
// If the class had any arguments, increment the counter that much forward
pos += tmpC->Arguments();
}
return true; // Let the code know this class was valid
}
return false; // Let the code know this class wasn't valid
}
void Parser::ParseNext() // Parses the block immidiately following
{
stringstream tmpStr;
stop = false;
// Smart generation
bool firstNonNote = false; // (unused so far)First byte wasn't a note or octacve switch, add ";Setup" comment
bool firstNote = false; // (unused so far) First note or octave
unsigned char lDataType = DATA_NA;
bool newBranch = false; // Create a new branch
stringstream pos;
pos << "; " << hex << uppercase << (unsigned int)filePos;
parsedString.push_back(pos.str());
unsigned int count = 1; // Counter for processed instructions
newBranch = true;
for(unsigned int i = filePos; (i <= fileLength) && (stop == false); i++)
{
if(newBranch)
{
stringstream _tmpBr;
_tmpBr << "\n";
_tmpBr << "UnknSong_md_" << hex << i << ":";
parsedString.push_back(_tmpBr.str());
_tmpBr.str("");
newBranch = false;
}
// First peek to see what kind of data it is, then perform any pre and post setup
if(ParseData<Call>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Call>(i);
lDataType = DATA_CALL;
}
else if(ParseData<Duty>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Duty>(i);
lDataType = DATA_DUTY;
}
else if(ParseData<Jump>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Jump>(i);
lDataType = DATA_JUMP;
}
else if(ParseData<Modulation>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Modulation>(i);
lDataType = DATA_MODULATION;
}
else if(ParseData<Note>(i, true))
{
// Insert a newline after certain types
if((lDataType == DATA_UNKCODE) ||
(lDataType == DATA_UNKEB)) parsedString.push_back("\n");
// If the previous item was a rest note then insert a new line
else if(lDataType == DATA_NOTE)
{
Note* _tmpNote = (Note*)parsedBytes[parsedBytes.size() - 1];
if(_tmpNote->GetPitch() == _tmpNote->noteRst) parsedString.push_back("\n");
}
ParseData<Note>(i);
// Further indent each note
parsedString[parsedString.size() - 1] = "\t" + parsedString[parsedString.size() - 1];
lDataType = DATA_NOTE;
}
else if(ParseData<Octave>(i, true))
{
// Insert new-line if previous line isn't a newline
if(parsedString[parsedString.size() - 1] != "\n") parsedString.push_back("\n");
ParseData<Octave>(i);
lDataType = DATA_OCTAVE;
}
else if(ParseData<Tempo>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Tempo>(i);
lDataType = DATA_TEMPO;
}
else if(ParseData<Velocity>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Velocity>(i);
lDataType = DATA_VELOCITY;
}
else if(ParseData<Volume>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Volume>(i);
lDataType = DATA_VOLUME;
}
else if(ParseData<UnkEB>(i, true)) // The opcode is 0xEB which is unknown and takes a 1-byte argument
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<UnkEB>(i);
lDataType = DATA_UNKEB;
}
else if(ParseData<Stop>(i, true))
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<Stop>(i);
if(!force) stop = true; // Raise the stop flag informing the parser to stop
newBranch = true;
lDataType = DATA_STOP;
}
else
{
if(lDataType == DATA_NOTE) parsedString.push_back("\n"); // Insert a newline after notes
ParseData<UnkCode>(i); // The opcode is unknown - process the raw byte and move on
lDataType = DATA_UNKCODE;
}
// Put everything tabbed over at least 1 time to fix some weird RGBDS bug by pre-pending a tab character
parsedString[parsedString.size() - 1] = "\t" + parsedString[parsedString.size() - 1];
// Append File Position in hexidecimal at end of line every 5 instructions
if((count % 5) == 0)
{
stringstream _tmpCount;
_tmpCount << hex << uppercase << i;
parsedString[parsedString.size() - 1] = parsedString[parsedString.size() - 1] + "; " + _tmpCount.str();
}
filePos = i;
count++;
// If the stop address parameter is set, break when we get there
if( (stopAddress != 0) && (i >= stopAddress) ) break;
}
// Now record the postion we left off
pos.str("");
pos << "; " << hex << uppercase << (unsigned int)filePos;
parsedString.push_back(pos.str());
filePos += 1; // increment 1 for the start of the next possible song
}