add address related funnctions

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 2.6)
 
-set(SOURCES aescrypt.c aeskey.c aes_modes.c aestab.c base58.c bignum.c bip32.c bip39.c ecdsa.c hmac.c nist256p1.c pbkdf2.c rand.c ripemd160.c secp256k1.c sha2.c ed25519-donna/ed25519.c sha3.c)
+set(SOURCES address.c aescrypt.c aeskey.c aes_modes.c aestab.c base58.c bignum.c bip32.c bip39.c ecdsa.c hmac.c nist256p1.c pbkdf2.c rand.c ripemd160.c secp256k1.c sha2.c ed25519-donna/ed25519.c sha3.c)
 include_directories(ed25519-donna)
 
 # disable sequence point warnings where they are expected

Makefile

@@ -38,6 +38,7 @@ CFLAGS += -DUSE_PRECOMPUTED_IV=0 -DUSE_PRECOMPUTED_CP=0
 endif
 
 SRCS   = bignum.c ecdsa.c curves.c secp256k1.c nist256p1.c rand.c hmac.c bip32.c bip39.c pbkdf2.c base58.c
+SRCS  += address.c
 SRCS  += script.c
 SRCS  += ripemd160.c
 SRCS  += sha2.c

address.c

@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2016 Daira Hopwood
+ * Copyright (c) 2016 Pavol Rusnak
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "address.h"
+
+size_t address_prefix_bytes_len(uint32_t address_type)
+{
+	if (address_type <= 0xFF)     return 1;
+	if (address_type <= 0xFFFF)   return 2;
+	if (address_type <= 0xFFFFFF) return 3;
+	return 4;
+}
+
+void address_write_prefix_bytes(uint32_t address_type, uint8_t *out)
+{
+	if (address_type > 0xFFFFFF) *(out++) =  address_type >> 24;
+	if (address_type > 0xFFFF)   *(out++) = (address_type >> 16) & 0xFF;
+	if (address_type > 0xFF)     *(out++) = (address_type >>  8) & 0xFF;
+	*(out++) = address_type & 0xFF;
+}
+
+bool address_check_prefix(const uint8_t *addr, uint32_t address_type)
+{
+	if (address_type <= 0xFF) {
+		return address_type == (uint32_t)(addr[0]);
+	}
+	if (address_type <= 0xFFFF) {
+		return address_type == ((uint32_t)(addr[0] << 8) | (uint32_t)(addr[1]));
+	}
+	if (address_type <= 0xFFFFFF) {
+		return address_type == ((uint32_t)(addr[0] << 16) | (uint32_t)(addr[1] << 8) | (uint32_t)(addr[2]));
+	}
+	return address_type == ((uint32_t)(addr[0] << 24) | (uint32_t)(addr[1] << 16) | (uint32_t)(addr[2] << 8) | (uint32_t)(addr[3]));
+}

address.h

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) 2016 Daira Hopwood
+ * Copyright (c) 2016 Pavol Rusnak
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __ADDRESS_H__
+#define __ADDRESS_H__
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+size_t address_prefix_bytes_len(uint32_t address_type);
+void address_write_prefix_bytes(uint32_t address_type, uint8_t *out);
+bool address_check_prefix(const uint8_t *addr, uint32_t address_type);
+
+#endif