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