72 lines
3.0 KiB
C#
72 lines
3.0 KiB
C#
using System.Collections.Generic;
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namespace KKdMainLib.IO
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{
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public static class IOExtensions
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{
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public static string NullTerminatedASCII(this Stream stream, byte End = 0) =>
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stream.NullTerminated(End).ToASCII();
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public static string NullTerminatedUTF8 (this Stream stream, byte End = 0) =>
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stream.NullTerminated(End).ToUTF8 ();
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public static byte[] NullTerminated (this Stream stream, byte End = 0)
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{
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List<byte> s = new List<byte>();
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while (stream.LongPosition < stream.LongLength)
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{
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byte a = stream.ReadByte();
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if (a == End) break;
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else s.Add(a);
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}
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return s.ToArray();
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}
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public static char PeekCharUTF8(this Stream stream)
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{ long LongPosition = stream.LongPosition; char val = stream.ReadCharUTF8();
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stream.LongPosition = LongPosition; return val; }
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public static Stream SkipWhitespace(this Stream stream)
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{
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long LongPosition = stream.LongPosition;
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while (true)
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if (char.IsWhiteSpace(stream.ReadCharUTF8())) LongPosition = stream.LongPosition;
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else { stream.LongPosition = LongPosition; break; }
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return stream;
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}
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public static bool Assert(this Stream stream, char next)
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{ if (stream.PeekCharUTF8() == next) { stream.ReadCharUTF8(); return true; } else return false; }
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public static bool Assert(this Stream stream, string next)
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{
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for (var i = 0; i < next.Length; i++)
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if (!stream.Assert(next[i])) return false;
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return true;
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}
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public static long ReadIntX(this Stream stream ) => stream.IsX ?
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stream.ReadInt64() : stream.ReadUInt32Endian( );
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public static long ReadIntX(this Stream stream, bool IsBE) => stream.IsX ?
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stream.ReadInt64() : stream.ReadUInt32Endian(IsBE);
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public static byte[] ReadAtOffset(this Stream stream, long Offset = 0, long Length = 0)
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{
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byte[] arr = null;
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long Position = stream.LongPosition;
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if (Offset == 0) { Position += stream.IsX ? 8 : 4; Offset = stream.ReadIntX(); }
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stream.LongPosition = Offset;
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if (Length == 0) arr = stream.NullTerminated();
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else arr = stream.ReadBytes(Length);
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stream.LongPosition = Position;
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return arr;
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}
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public static string ReadStringAtOffset(this Stream stream, long Offset = 0, long Length = 0)
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{
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string s = null;
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long Position = stream.LongPosition;
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if (Offset == 0) { Position += stream.IsX ? 8 : 4; Offset = stream.ReadIntX(); }
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stream.LongPosition = Offset;
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if (Length == 0) s = stream.NullTerminatedUTF8();
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else s = stream.ReadStringUTF8(Length);
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stream.LongPosition = Position;
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return s;
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}
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}
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}
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