Method readFile

TheForceEngine/TFE_Archive/zipArchive.cpp:214–249

}

size_t ZipArchive::readFile(void* data, size_t size)
{
	if (m_curFile == INVALID_FILE) { return 0u; }
	if (size == 0) { size = m_entries[m_curFile].length; }

	const size_t sizeToRead = std::min(size, m_entries[m_curFile].length);
	// The fast path is to just read the entire entry into the provided memory, avoiding the extra memcopy.
	// This is only done if we are reading the entire file and there is no offset.
	if (m_fileOffset == 0 && sizeToRead == m_entries[m_curFile].length)
	{
		m_fileOffset += (s32)sizeToRead;
		s64 actualSizeRead = zip_entry_noallocread((struct zip_t*)m_fileHandle, data, sizeToRead);
		if (actualSizeRead <= 0)
		{
			return 0u;
		}
		return size_t(actualSizeRead);
	}

	// Otherwise go through the slower path - a one time decompression and read, followed
	// by memcopying the data into the output as needed.
	if (!m_entryRead)
	{
		// Read the whole entry into temporary memory.
		assert(m_tempBufferSize >= m_entries[m_curFile].length);
		if (zip_entry_noallocread((struct zip_t*)m_fileHandle, m_tempBuffer, m_entries[m_curFile].length) <= 0)
		{
			return 0u;
		}
		m_entryRead = true;
	}
	// Then copy the section we want into the output.
	memcpy(data, m_tempBuffer + m_fileOffset, sizeToRead);
	m_fileOffset += (s32)sizeToRead;
	return sizeToRead;
}

bool ZipArchive::seekFile(s32 offset, s32 origin)
{