66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
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#include <content/providers/base64_provider.hpp>
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#include <hex/helpers/crypto.hpp>
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#include <hex/helpers/utils.hpp>
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namespace hex::plugin::builtin {
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void Base64Provider::readRaw(u64 offset, void *buffer, size_t size) {
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const u64 base64Offset = 4 * (offset / 3);
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const u64 base64Size = hex::alignTo<u64>(4 * (size / 3), 4) + 4;
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std::vector<u8> bytes(base64Size);
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FileProvider::readRaw(base64Offset, bytes.data(), bytes.size());
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auto decoded = crypt::decode64(bytes);
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if (decoded.empty())
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return;
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u64 startOffset = offset % 3;
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std::memcpy(buffer, decoded.data() + startOffset, std::min<size_t>(decoded.size() - startOffset, size));
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}
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void Base64Provider::writeRaw(u64 offset, const void *buffer, size_t size) {
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const u64 base64Offset = 4 * (offset / 3);
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const u64 base64Size = hex::alignTo<u64>(4 * (size / 3), 4) + 4;
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std::vector<u8> bytes(base64Size);
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FileProvider::readRaw(base64Offset, bytes.data(), bytes.size());
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auto decoded = crypt::decode64(bytes);
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if (decoded.empty())
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return;
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u64 startOffset = offset % 3;
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std::memcpy(decoded.data() + startOffset, buffer, std::min<size_t>(decoded.size() - startOffset, size));
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auto encoded = crypt::encode64(decoded);
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if (encoded.empty())
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return;
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FileProvider::writeRaw(base64Offset, encoded.data(), encoded.size());
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}
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void Base64Provider::resizeRaw(u64 newSize) {
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u64 newFileLength = 4 * (newSize / 3);
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FileProvider::resizeRaw(newFileLength);
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}
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void Base64Provider::insertRaw(u64 offset, u64 size) {
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u64 newFileLength = 4 * ((getActualSize() + size) / 3);
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FileProvider::insertRaw(4 * (offset / 3), newFileLength);
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constexpr static auto NullByte = 0x00;
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for (u64 i = 0; i < size; i++)
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writeRaw(offset + i, &NullByte, 1);
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}
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void Base64Provider::removeRaw(u64 offset, u64 size) {
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u64 newFileLength = 4 * ((getActualSize() - size) / 3);
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FileProvider::removeRaw(4 * (offset / 3), newFileLength);
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}
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}
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