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#include "HexEditor.h"
/* Helper functions */
size_t fileSize(std::ifstream& file) {
size_t currIndex = file.tellg();
file.seekg(0, std::ios::end);
size_t size = file.tellg();
file.seekg(currIndex, std::ios::beg);
return size;
}
/* Private functions */
void HexEditor::resizeBuffer() {
size_t newLen = (length == 0) ? 8 : length << 1;
Bytex* temp = new Bytex[newLen];
for (size_t i = 0; i < length; i++)
temp[i] = fileBuffer[i];
if (length != 0) delete[] fileBuffer;
fileBuffer = temp;
length = newLen;
}
char HexEditor::bytexToReadableChar(const Bytex& bytex) const {
char b = bytex.getByte();
if ((b >= 'A' && b <= 'Z') || (b >= 'a' && b <= 'z'))
return b;
return '.';
}
/* Public functions */
HexEditor::HexEditor(const char* filePath) {
std::ifstream inFile(filePath);
if (!inFile.is_open()) {
std::cout << "Error opening file" << std::endl;
return;
}
size_t size = fileSize(inFile);
length = count = 0;
for (size_t i = 0; i < size; i++)
add(inFile.get());
inFile.close();
size_t pathLen = strlen(filePath) + 1;
originalFilePath = new char[pathLen];
strcpy(originalFilePath, filePath);
}
HexEditor::~HexEditor() {
delete[] fileBuffer;
delete[] originalFilePath;
}
void HexEditor::change(size_t index, const Bytex& bytex) {
fileBuffer[index] = bytex;
}
void HexEditor::add(const Bytex& bytex) {
if (count == length)
resizeBuffer();
fileBuffer[count++] = bytex;
}
void HexEditor::remove() {
fileBuffer[count--] = Bytex('\0');
}
void HexEditor::viewFile() const {
char buffer[2];
for (size_t i = 0; i < count; i++) {
fileBuffer[i].getHex(buffer);
std::cout << buffer << " ";
}
std::cout << std::endl;
for (size_t i = 0; i < count; i++)
std::cout << bytexToReadableChar(fileBuffer[i]) << " ";
std::cout << std::endl;
}
void HexEditor::save() const {
saveAs(originalFilePath);
}
void HexEditor::saveAs(const char* filePath) const {
std::ofstream outFile(filePath);
for (size_t i = 0; i < count; i++)
outFile.put(fileBuffer[i].getByte());
outFile.close();
}
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