public void ToXXX()
{
var sut = new LittleEndianBitConverter();
var data = new byte[] { 0x03, 0, 0, 0, 0, 0, 0, 0 };
Check.That(sut.ToBoolean(data, 0)).IsTrue();
Check.That(sut.ToBoolean(data, 7)).IsFalse();
Check.That(sut.ToChar(data, 0)).IsEqualTo('\u0003');
Check.That(sut.ToChar(data, 6)).IsEqualTo('\0');
Check.That(sut.ToInt16(data, 0)).IsEqualTo(3);
Check.That(sut.ToInt16(data, 6)).IsEqualTo(0);
Check.That(sut.ToUInt16(data, 0)).IsEqualTo(3u);
Check.That(sut.ToUInt16(data, 6)).IsEqualTo(0u);
Check.That(sut.ToInt32(data, 0)).IsEqualTo(3);
Check.That(sut.ToInt32(data, 4)).IsEqualTo(0);
Check.That(sut.ToUInt32(data, 0)).IsEqualTo(3u);
Check.That(sut.ToUInt32(data, 4)).IsEqualTo(0u);
Check.That(sut.ToInt64(data, 0)).IsEqualTo(3L);
Check.That(sut.ToUInt64(data, 0)).IsEqualTo(3UL);
data = new byte[] { 0, 0, 0, 0, 0, 0, 0x20, 0x41 };
Check.That(sut.ToSingle(data, 0)).IsEqualTo(0.0f);
Check.That(sut.ToSingle(data, 4)).IsEqualTo(10.0f);
data = new byte[] { 0, 0, 0, 0, 0, 0, 0x24, 0x40 };
Check.That(sut.ToDouble(data, 0)).IsEqualTo(10.0);
}
public short DecodeInt16(byte[] bytes, Iterator it)
{
short value = bitConverter.ToInt16(bytes, it.Offset);
it.Offset += 2;
return(value);
}
public void LittleEndianBitConverter_Int16()
{
const int n = sizeof(Int16);
const Int16 pos = 0x1122;
const Int16 zero = 0;
const Int16 neg = -pos;
var posRepr = new byte[] { 0x22, 0x11 };
// --------------------------------------------------------------
var buffer = new byte[n];
LittleEndianBitConverter.FillBytes(pos, buffer);
Assert.IsTrue(buffer.SequenceEqual(posRepr));
Assert.IsTrue(LittleEndianBitConverter.GetBytes(pos).SequenceEqual(buffer));
Assert.AreEqual(pos, LittleEndianBitConverter.ToInt16(buffer));
LittleEndianBitConverter.FillBytes(zero, buffer);
Assert.IsTrue(buffer.SequenceEqual(new byte[n]));
Assert.IsTrue(LittleEndianBitConverter.GetBytes(zero).SequenceEqual(buffer));
Assert.AreEqual(zero, LittleEndianBitConverter.ToInt16(buffer));
LittleEndianBitConverter.FillBytes(neg, buffer);
Assert.IsTrue(buffer.SequenceEqual(Neg(posRepr)));
Assert.IsTrue(LittleEndianBitConverter.GetBytes(neg).SequenceEqual(buffer));
Assert.AreEqual(neg, LittleEndianBitConverter.ToInt16(buffer));
}
public unsafe short imethod_45()
{
short int16;
fixed(byte *pointer = this.byte_5)
{
this.method_0(pointer);
int16 = LittleEndianBitConverter.ToInt16(this.byte_5);
}
return(int16);
}
public unsafe short imethod_14()
{
short num;
switch (this.imethod_13())
{
case 0:
fixed(byte *pointer = this.byte_5)
{
this.method_0(pointer);
num = LittleEndianBitConverter.ToInt16(this.byte_5);
}
break;
case 1:
if (this.int_0 == 0)
{
this.method_6();
num = (short)this.byte_3;
break;
}
num = (short)this.method_7();
break;
case 2:
num = (short)0;
break;
case 3:
num = (short)256;
break;
default:
throw new DxfException("Illegal short.");
}
return(num);
}
public static short smethod_3(Stream stream)
{
byte[] numArray = new byte[2];
stream.Read(numArray, 0, 2);
return(LittleEndianBitConverter.ToInt16(numArray, 0));
}
/// <summary>
/// Read all metadata (headers, encodings, formats etc...)
/// </summary>
/// <param name="fileInfo">The file info of the sgy file</param>
/// <returns></returns>
public static SgyFile Open(FileInfo fileInfo)
{
if (fileInfo == null)
{
throw new ArgumentNullException("File info cannot be null");
}
if (fileInfo.Exists == false)
{
throw new FileNotFoundException($"File {fileInfo.FullName} does not exist");
}
if (fileInfo.Length < TextHeaderBytesCount + BinaryHeaderBytesCount)
{
throw new ArgumentException($"File {fileInfo.FullName} does not have enough bytes in its content to infer file metadata. This implies the file is corrupt, or not a real sgy file. Try creating a new sgy file isntead.");
}
// Local variables
byte[] buffer = new byte[65536];
FileStream fileStream;
Encoding textHeaderEncoding;
List <string> textHeaders = new List <string>();
EndianBitConverter endianBitConverter;
FileHeader binaryHeader;
EndianBitConverter bigEBitConverter = new BigEndianBitConverter();
EndianBitConverter lilEBitConverter = new LittleEndianBitConverter();
// Get text header bytes and binary header bytes
fileStream = new FileStream(fileInfo.FullName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
fileStream.Read(buffer, 0, TextHeaderBytesCount + BinaryHeaderBytesCount);
// Evaluate text encoding (ascii and ebcdic supported by sgy....for no modern day reason)
textHeaderEncoding = buffer[0] == 'C' ? Encoding.ASCII : EbcdicEncoding.GetEncoding("EBCDIC-US");
textHeaders.Add(textHeaderEncoding.GetString(buffer, 0, TextHeaderBytesCount));
// Endianness and format code
short bigEFormatCode = bigEBitConverter.ToInt16(buffer, 3224);
short lilEFormatCode = lilEBitConverter.ToInt16(buffer, 3224);
if (lilEFormatCode >= 0 || lilEFormatCode <= 8)
{
endianBitConverter = new LittleEndianBitConverter();
}
if (bigEFormatCode >= 0 || bigEFormatCode <= 8)
{
endianBitConverter = new BigEndianBitConverter();
}
else
{
throw new Exception("Cannot infer endianess from the format code");
}
// File Binary Header
binaryHeader = FileHeader.From(buffer, TextHeaderBytesCount, endianBitConverter);
// Extended text headers
fileStream.Seek(3600, SeekOrigin.Begin);
fileStream.Read(buffer, 0, binaryHeader.ExtendedTextHeadersCount * TextHeaderBytesCount);
for (int i = 0; i < binaryHeader.ExtendedTextHeadersCount; i++)
{
textHeaders.Add(textHeaderEncoding.GetString(buffer, i * TextHeaderBytesCount, TextHeaderBytesCount));
}
return(new SgyFile(fileStream, textHeaders, textHeaderEncoding, binaryHeader, endianBitConverter));
}
public virtual short vmethod_4()
{
byte[] numArray = new byte[2];
this.stream_0.Read(numArray, 0, 2);
return(LittleEndianBitConverter.ToInt16(numArray));
}
/// <summary>
/// Read data from stream
/// </summary>
/// <param name="s">stream</param>
/// <returns>data of specified type</returns>
public static long ToInt64(Stream s)
{
byte[] buf = GetBytes(s, sizeof(long));
return(LittleEndianBitConverter.ToInt16(buf, 0));
}
/// <summary>
/// Read data from stream
/// </summary>
/// <param name="s">stream</param>
/// <returns>data of specified type</returns>
public static int ToInt32(Stream s)
{
byte[] buf = GetBytes(s, sizeof(int));
return(LittleEndianBitConverter.ToInt16(buf, 0));
}
