inital commit (message v3)

solanaceae/message3/file_r_mem.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include "./file.hpp"
+
+struct FileRMem : public FileI {
+	std::vector<uint8_t> _data;
+
+	FileRMem(void) = delete;
+	FileRMem(const std::vector<uint8_t>& data) : _data(data) {
+		_file_size = _data.size();
+	}
+	virtual ~FileRMem(void) {}
+
+	bool isGood(void) override {
+		return true;
+	}
+
+	std::vector<uint8_t> read(uint64_t pos, uint32_t size) override {
+		if (_file_size > 0 && pos >= _data.size()) {
+			return {};
+		}
+
+		// TODO: optimize
+		std::vector<uint8_t> chunk;
+		for (size_t i = 0; i < size && i+pos < _data.size(); i++) {
+			chunk.push_back(_data[pos+i]);
+		}
+		//chunk.insert(chunk.begin(), _data.cbegin()+pos, _data.cbegin()+pos+size);
+
+		_bytes_read += chunk.size();
+
+		return chunk;
+	}
+
+	// read only
+	bool write(uint64_t, const std::vector<uint8_t>&) override { return false; }
+};
+