57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
#include "InMemoryFile.h"
|
|
|
|
using cpputils::Data;
|
|
|
|
InMemoryFile::InMemoryFile(Data data): _data(std::move(data)) {
|
|
}
|
|
|
|
InMemoryFile::~InMemoryFile() {
|
|
}
|
|
|
|
int InMemoryFile::read(void *buf, size_t count, off_t offset) const {
|
|
size_t realCount = std::min(count, (size_t)(_data.size() - offset));
|
|
std::memcpy(buf, (uint8_t*)_data.data() + offset, realCount);
|
|
return realCount;
|
|
}
|
|
|
|
const void *InMemoryFile::data() const {
|
|
return _data.data();
|
|
}
|
|
|
|
bool InMemoryFile::fileContentEquals(const Data &expected, off_t offset) const {
|
|
return 0 == std::memcmp((uint8_t*)expected.data(), (uint8_t*)_data.data() + offset, expected.size());
|
|
}
|
|
|
|
size_t InMemoryFile::size() const {
|
|
return _data.size();
|
|
}
|
|
|
|
WriteableInMemoryFile::WriteableInMemoryFile(Data data): InMemoryFile(std::move(data)), _originalData(_data.copy()) {
|
|
}
|
|
|
|
void WriteableInMemoryFile::write(const void *buf, size_t count, off_t offset) {
|
|
_extendFileSizeIfNecessary(count + offset);
|
|
|
|
std::memcpy((uint8_t*)_data.data() + offset, buf, count);
|
|
}
|
|
|
|
void WriteableInMemoryFile::_extendFileSizeIfNecessary(size_t size) {
|
|
if (size > _data.size()) {
|
|
_extendFileSize(size);
|
|
}
|
|
}
|
|
|
|
void WriteableInMemoryFile::_extendFileSize(size_t size) {
|
|
Data newfile(size);
|
|
std::memcpy(newfile.data(), _data.data(), _data.size());
|
|
_data = std::move(newfile);
|
|
}
|
|
|
|
bool WriteableInMemoryFile::sizeUnchanged() const {
|
|
return _data.size() == _originalData.size();
|
|
}
|
|
|
|
bool WriteableInMemoryFile::regionUnchanged(off_t offset, size_t count) const {
|
|
return 0 == std::memcmp((uint8_t*)_data.data() + offset, (uint8_t*)_originalData.data() + offset, count);
|
|
}
|