Initial commit

Base64.hpp

@@ -0,0 +1,45 @@
+#pragma once
+#include <string>
+#include <vector>
+
+typedef unsigned char uchar;
+
+namespace base64 {
+	const std::string base64_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+	std::string Encode(const std::string &in)
+	{
+		std::string out;
+		int val = 0, valb = -6;
+		for (uchar c : in) {
+			val = (val << 8) + c;
+			valb += 8;
+			while (valb >= 0) {
+				out.push_back(base64_chars[(val >> valb) & 0x3F]);
+				valb -= 6;
+			}
+		}
+		if (valb > -6) out.push_back(base64_chars[((val << 8) >> (valb + 8)) & 0x3F]);
+		while (out.size() % 4) out.push_back('=');
+		return out;
+	}
+
+	std::string Decode(const std::string &in)
+	{
+		std::string out;
+		std::vector<int> T(256, -1);
+		for (int i = 0; i < 64; i++) T[base64_chars[i]] = i;
+
+		int val = 0, valb = -8;
+		for (uchar c : in) {
+			if (T[c] == -1) break;
+			val = (val << 6) + T[c];
+			valb += 6;
+			if (valb >= 0) {
+				out.push_back(char((val >> valb) & 0xFF));
+				valb -= 8;
+			}
+		}
+		return out;
+	}
+}