1 files changed, 63 insertions, 0 deletions
diff --git a/src/hash.cpp b/src/hash.cpp
new file mode 100644
index 0000000..89b14cc
--- /dev/null
+++ b/src/hash.cpp
@@ -0,0 +1,63 @@
+#include "hash.h"
+#include "crc32.h"
+
+#include <stdexcept>
+#include <iostream>
+
+namespace Multihash {
+	namespace Hex {
+		static char* digits = "0123456789abcdef";
+		std::string hex(char* bin, int length) {
+			std::string s(length * 2, ' ');
+			for(int i = 0; i < length; i++) {
+				s[i*2] = digits[(bin[i] >> 4) & 0xf];
+				s[i*2+1] = digits[bin[i] & 0xf];
+			}
+			return s;
+		}
+		std::string hex(int bin) {
+			std::string s(sizeof(int) * 2, ' ');
+			for(int i = 0; i < sizeof(int) * 2; i++) {
+				s[sizeof(int) * 2 - 1 - i] = digits[bin & 0xf];
+				bin = bin >> 4;
+			}
+			return s;
+		}
+	}
+	
+	Hash::Hash(Hash* n) {
+		digest_str = "";
+		next = n;
+	}
+	
+	void Hash::update(std::string data) {
+		const char* buf = data.c_str();
+		int len = data.length();
+		this->_update(buf, len);
+	}
+	
+	void Hash::_update(const char* data, int length) {
+		if(digest_str.length()) {
+			throw std::runtime_error("Can't update after digest.");
+		}
+		this->hash_update(data, length);
+		if(next) {
+			next->_update(data, length);
+		}
+	}
+	
+	std::string Hash::digest() {
+		if(!digest_str.length()) {
+			digest_str = this->hash_digest();
+		}
+		return digest_str;
+	}
+	
+	void Hash::hash_update(const char* data, int length) {
+		throw std::runtime_error("Not implemented.");
+	}
+	
+	std::string Hash::hash_digest() {
+		throw std::runtime_error("Not implemented.");
+	}
+}