X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;ds=sidebyside;f=c_sharp%2Fsrc%2Forg%2Fldk%2Futil%2FInternalUtils.cs;h=927409e2a4e2ce7782447ff809f38bebe7edae2c;hb=7e1f2789179f10de55d007b8466c5f439c7587e6;hp=214420a8bd249af0f252da43b43f4953f118fe7b;hpb=3cc0a74cece1ef4dd8c816add1172fbbf719da23;p=ldk-java

diff --git a/c_sharp/src/org/ldk/util/InternalUtils.cs b/c_sharp/src/org/ldk/util/InternalUtils.cs
index 214420a8..927409e2 100644
--- a/c_sharp/src/org/ldk/util/InternalUtils.cs
+++ b/c_sharp/src/org/ldk/util/InternalUtils.cs
@@ -1,5 +1,7 @@
 using System;
+using System.Text;
 using org.ldk.util;
+using org.ldk.impl;
 
 internal class InternalUtils {
 	public static T[] check_arr_len<T>(T[] arr, int length) {
@@ -10,6 +12,7 @@ internal class InternalUtils {
 	}
 
 	public static byte[] convUInt5Array(UInt5[] u5s) {
+		if (u5s == null) return null;
 		byte[] res = new byte[u5s.Length];
 		for (int i = 0; i < u5s.Length; i++) {
 			res[i] = u5s[i].getVal();
@@ -18,8 +21,123 @@ internal class InternalUtils {
 	}
 
 	public static T[] mapArray<F, T>(F[] arr, Func<F, T> f) {
+		if (arr == null) return null;
 		T[] ret = new T[arr.Length];
 		for (int i = 0; i < arr.Length; i++) ret[i] = f(arr[i]);
 		return ret;
 	}
+
+	public static string decodeString(long strptr) {
+		byte[] bytes = decodeUint8Array(strptr);
+		return Encoding.UTF8.GetString(bytes);
+	}
+
+	public static long encodeString(string s) {
+		byte[] bytes = Encoding.UTF8.GetBytes(s);
+		return encodeUint8Array(bytes);
+	}
+
+
+	public static int getArrayLength(long arrptr) {
+		long len;
+		unsafe {
+			long* arrlen = (long*) arrptr;
+			len = *arrlen;
+		}
+		if (len > 0xffffffffL) {
+			throw new ArgumentException("Array length was out of bounds");
+		}
+		return (int)len;
+	}
+
+
+	public static long getU64ArrayElem(long arrptr, int idx) {
+		unsafe {
+			long* arr = (long*) (arrptr + 8);
+			return arr[idx];
+		}
+	}
+	public static int getU32ArrayElem(long arrptr, int idx) {
+		unsafe {
+			int* arr = (int*) (arrptr + 8);
+			return arr[idx];
+		}
+	}
+	public static short getU16ArrayElem(long arrptr, int idx) {
+		unsafe {
+			short* arr = (short*) (arrptr + 8);
+			return arr[idx];
+		}
+	}
+	public static byte getU8ArrayElem(long arrptr, int idx) {
+		unsafe {
+			byte* arr = (byte*) (arrptr + 8);
+			return arr[idx];
+		}
+	}
+
+
+	public static long encodeUint8Array(byte[] arr) {
+		long buf = bindings.allocate_buffer(arr.Length + 8);
+		unsafe { *((long*)buf) = (long)arr.Length; }
+		for (int i = 0; i < arr.Length; i++) {
+			unsafe {
+				((byte*)(buf + 8))[i] = arr[i];
+			}
+		}
+		return buf;
+	}
+	public static long encodeUint16Array(short[] arr) {
+		long buf = bindings.allocate_buffer(arr.Length * 2 + 8);
+		unsafe { *((long*)buf) = (long)arr.Length; }
+		for (int i = 0; i < arr.Length; i++) {
+			unsafe {
+				((short*)(buf + 8))[i] = arr[i];
+			}
+		}
+		return buf;
+	}
+	public static long encodeUint32Array(int[] arr) {
+		long buf = bindings.allocate_buffer(arr.Length * 4 + 8);
+		unsafe { *((long*)buf) = (long)arr.Length; }
+		for (int i = 0; i < arr.Length; i++) {
+			unsafe {
+				((int*)(buf + 8))[i] = arr[i];
+			}
+		}
+		return buf;
+	}
+	public static long encodeUint64Array(long[] arr) {
+		long buf = bindings.allocate_buffer(arr.Length * 8 + 8);
+		unsafe { *((long*)buf) = (long)arr.Length; }
+		for (int i = 0; i < arr.Length; i++) {
+			unsafe {
+				((long*)(buf + 8))[i] = arr[i];
+			}
+		}
+		return buf;
+	}
+
+
+	public static byte[] decodeUint8Array(long arrptr) {
+		int len = getArrayLength(arrptr);
+		byte[] res = new byte[len];
+		for (int i = 0; i < len; i++)
+			res[i] = getU8ArrayElem(arrptr, i);
+		return res;
+	}
+	public static short[] decodeUint16Array(long arrptr) {
+		int len = getArrayLength(arrptr);
+		short[] res = new short[len];
+		for (int i = 0; i < len; i++)
+			res[i] = getU16ArrayElem(arrptr, i);
+		return res;
+	}
+	public static long[] decodeUint64Array(long arrptr) {
+		int len = getArrayLength(arrptr);
+		long[] res = new long[len];
+		for (int i = 0; i < len; i++)
+			res[i] = getU64ArrayElem(arrptr, i);
+		return res;
+	}
 }