Initial commit

LibDgf/GMWare.IO/StringReadingHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.IO;
+
+namespace GMWare.IO
+{
+    /// <summary>
+    /// Collection of methods for reading strings using BinaryReader
+    /// </summary>
+    public static class StringReadingHelper
+    {
+        /// <summary>
+        /// Reads a string of a given length.
+        /// </summary>
+        /// <param name="reader">BinaryReader to read from</param>
+        /// <param name="length">Length of string to read</param>
+        /// <returns>The string that was read.</returns>
+        public static string ReadLengthedString(BinaryReader reader, int length)
+        {
+            return new string(reader.ReadChars(length));
+        }
+
+        /// <summary>
+        /// Reads a null terminated string.
+        /// </summary>
+        /// <param name="reader">BinaryReader to read from</param>
+        /// <returns>The string that was read.</returns>
+        public static string ReadNullTerminatedString(BinaryReader reader)
+        {
+            StringBuilder sb = new StringBuilder();
+            for (char ch = reader.ReadChar(); ch != '\0'; ch = reader.ReadChar())
+            {
+                sb.Append(ch);
+            }
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// Reads a null terminated string from within a fixed size block.
+        /// </summary>
+        /// <param name="reader">BinaryReader to read from</param>
+        /// <param name="blockLen">The length of the fixed size block</param>
+        /// <param name="encoding">The encoding the string is in</param>
+        /// <returns>The string that was read.</returns>
+        public static string ReadNullTerminatedStringFromFixedSizeBlock(BinaryReader reader, int blockLen, Encoding encoding)
+        {
+            byte[] data = reader.ReadBytes(blockLen);
+            string str = encoding.GetString(data);
+            int indNull = str.IndexOf('\0');
+            if (indNull >= 0)
+            {
+                return str.Substring(0, indNull);
+            }
+            else
+            {
+                return str;
+            }
+        }
+    }
+}