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Implemented header crc16 calculation

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Luca 2019-09-15 20:47:02 +02:00
parent 880fdd8c2f
commit aaa60c9bb0
8 changed files with 102 additions and 7 deletions
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3
NDSFactory.pro
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@ -41,7 +41,8 @@ HEADERS += \
ndsheader.h \
ndsfactory.h \
aboutdialog.h \
fatstruct.h
fatstruct.h \
crctable.h
FORMS += \
mainwindow.ui \

43
crctable.h Normal file
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@ -0,0 +1,43 @@
#ifndef CRCTABLE_H
#define CRCTABLE_H
#include <cstdint>
static const uint16_t lCRCTable[] =
{
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
};
#endif // CRCTABLE_H

4
mainwindow.h
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@ -54,6 +54,8 @@ private slots:
void on_fatPatchingPatchFatBtn_clicked();
void on_packerCalcHeaderCrcBtn_clicked();
private:
Ui::MainWindow *ui;
NDSFactory ndsFactory;
@ -74,7 +76,9 @@ private:
bool dumpEverything(QString dirPath);
void populatePackerSectionHeader(NDSHeader *ndsHeader);
void generateHeader(NDSHeader* pRomHeader);
bool writeHeader(const std::string& savePath);
void calcHeaderCrc16();
bool writeArm9Bin(const std::string& savePath, bool isArm9FooterPresent);
bool writeArm7Bin(const std::string& savePath);
bool writeFnt(const std::string& savePath);

7
mainwindow.ui
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@ -1626,6 +1626,13 @@
</property>
</spacer>
</item>
<item>
<widget class="QPushButton" name="packerCalcHeaderCrcBtn">
<property name="text">
<string>Calc Header CRC</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="packerLoadHeaderBtn">
<property name="sizePolicy">

19
ndsfactory.cpp
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@ -4,6 +4,7 @@
#include <cmath>
#include "ndsfactory.h"
#include "fatstruct.h"
#include "crctable.h"
NDSFactory::NDSFactory()
@ -145,3 +146,21 @@ bool NDSFactory::patchFat(const std::string& fatSectionPath, uint32_t shiftSize,
return writeBytesToFile(fatBytes, savePath, 0, static_cast<uint32_t>(sectionSize));
}
uint16_t NDSFactory::calcHeaderCrc16(const std::vector<char>& romHeader)
{
uint8_t loc;
uint16_t crc = 0xFFFF;
size_t size = 0x15E;
size_t index = 0;
while (size--)
{
loc = static_cast<unsigned char>(romHeader[index] ^ crc);
index++;
crc >>= 8;
crc ^= lCRCTable[loc];
}
return crc;
}

1
ndsfactory.h
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@ -21,6 +21,7 @@ public:
int getCardSizeInBytes(int cardType);
bool checkArm9FooterPresence(const std::string& sectionPath, uint32_t size);
bool patchFat(const std::string& sectionPath, uint32_t shiftSize, const std::string& savePath);
uint16_t calcHeaderCrc16(const std::vector<char>& romHeader);
private:

27
packertabfunctions.cpp
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@ -58,12 +58,8 @@ void MainWindow::populatePackerSectionHeader(NDSHeader *ndsHeader)
ui->packerDebugRamAddrEdt->setText(QString::number(ndsHeader->DebugRamAddr, 16));
}
bool MainWindow::writeHeader(const std::string& savePath)
void MainWindow::generateHeader(NDSHeader* pRomHeader)
{
std::vector<char> romHeader(sizeof(NDSHeader));
NDSHeader* pRomHeader = reinterpret_cast<NDSHeader*>(romHeader.data());
std::copy_n(ui->packerGameTitleEdt->text().toLatin1().data(), 0xc, std::begin(pRomHeader->GameTitle));
std::copy_n(ui->packerGameCodeEdt->text().toStdString().data(), 0x4, std::begin(pRomHeader->GameCode));
std::copy_n(ui->packerMakerCodeEdt->text().toStdString().data(), 0x2, std::begin(pRomHeader->MakerCode));
@ -121,10 +117,30 @@ bool MainWindow::writeHeader(const std::string& savePath)
std::fill(std::begin(pRomHeader->Reserved3), std::end(pRomHeader->Reserved3), 0);
std::fill(std::begin(pRomHeader->Reserved4), std::end(pRomHeader->Reserved4), 0);
}
bool MainWindow::writeHeader(const std::string& savePath)
{
std::vector<char> romHeader(sizeof(NDSHeader));
NDSHeader* pRomHeader = reinterpret_cast<NDSHeader*>(romHeader.data());
generateHeader(pRomHeader);
return ndsFactory.writeBytesToFile(romHeader, savePath, 0, sizeof(NDSHeader));;
}
void MainWindow::calcHeaderCrc16()
{
std::vector<char> romHeader(sizeof(NDSHeader));
NDSHeader* pRomHeader = reinterpret_cast<NDSHeader*>(romHeader.data());
generateHeader(pRomHeader);
ui->packerHeaderCRCEdt->setText(QString::number(ndsFactory.calcHeaderCrc16(romHeader), 16));
}
bool MainWindow::writeArm9Bin(const std::string& savePath, bool isArm9FooterPresent)
{
uint32_t size = ui->packerARM9SizeEdt->text().toUInt(nullptr, 16);
@ -309,7 +325,6 @@ bool MainWindow::writeRomPadding(const std::string& savePath)
size);
}
bool MainWindow::writeEverything(const std::string& savePath)
{
bool res = true;

5
packertabsignals.cpp
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@ -183,3 +183,8 @@ void MainWindow::on_packerBuildNDSRomBtn_clicked()
}
}
void MainWindow::on_packerCalcHeaderCrcBtn_clicked()
{
calcHeaderCrc16();
}