using System; using System.Collections.Generic; using System.Text; using System.IO; namespace ANN.Perceptron.ArchiveSerialization { static public class MFCStringReader { static public string ReadCString(BinaryReader reader) { string str = ""; int nConvert = 1; // if we get ANSI, convert UInt32 nNewLen = ReadStringLength(reader); if (nNewLen == unchecked((UInt32)(-1))) { nConvert = 1 - nConvert; nNewLen = ReadStringLength(reader); if (nNewLen == unchecked((UInt32)(-1))) return str; } // set length of string to new length UInt32 nByteLen = nNewLen; nByteLen += (UInt32)(nByteLen * (1 - nConvert)); // bytes to read // read in the characters if (nNewLen != 0) { // read new data byte[] byteBuf = reader.ReadBytes((int)nByteLen); // convert the data if as necessary StringBuilder sb = new StringBuilder(); if (nConvert != 0) { for (int i = 0; i < nNewLen; i++) sb.Append((char)byteBuf[i]); } else { for (int i = 0; i < nNewLen; i++) sb.Append((char)(byteBuf[i * 2] + byteBuf[i * 2 + 1] * 256)); } str = sb.ToString(); } return str; } static private UInt32 ReadStringLength(BinaryReader reader) { UInt32 nNewLen; // attempt BYTE length first byte bLen = reader.ReadByte(); if (bLen < 0xff) return bLen; // attempt WORD length UInt16 wLen = reader.ReadUInt16(); if (wLen == 0xfffe) { // UNICODE string prefix (length will follow) return unchecked((UInt32)(-1)); } else if (wLen == 0xffff) { // read DWORD of length nNewLen = reader.ReadUInt32(); return nNewLen; } else return wLen; } } }
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