public virtual void TestGetNullTerminatedString()
{
sbyte[] bytes = new sbyte[] { unchecked ((int)(0x41)), unchecked ((int)(0x42)), unchecked ((int)(0x43)), unchecked ((int)(0x44)), unchecked ((int)(0x00)), unchecked ((int)(0x45)), unchecked ((int)(0x46)), unchecked ((int)(0x47)) };
RandomAccessReader reader = CreateReader(bytes);
Sharpen.Tests.AreEqual(string.Empty, reader.GetNullTerminatedString(0, 0));
Sharpen.Tests.AreEqual("A", reader.GetNullTerminatedString(0, 1));
Sharpen.Tests.AreEqual("AB", reader.GetNullTerminatedString(0, 2));
Sharpen.Tests.AreEqual("ABC", reader.GetNullTerminatedString(0, 3));
Sharpen.Tests.AreEqual("ABCD", reader.GetNullTerminatedString(0, 4));
Sharpen.Tests.AreEqual("ABCD", reader.GetNullTerminatedString(0, 5));
Sharpen.Tests.AreEqual("ABCD", reader.GetNullTerminatedString(0, 6));
Sharpen.Tests.AreEqual("BCD", reader.GetNullTerminatedString(1, 3));
Sharpen.Tests.AreEqual("BCD", reader.GetNullTerminatedString(1, 4));
Sharpen.Tests.AreEqual("BCD", reader.GetNullTerminatedString(1, 5));
Sharpen.Tests.AreEqual(string.Empty, reader.GetNullTerminatedString(4, 3));
}
private static void ProcessTag(Com.Drew.Metadata.Directory directory, int tagType, int tagValueOffset, int componentCount, int formatCode, RandomAccessReader reader)
{
switch (formatCode)
{
case FmtUndefined:
{
// Directory simply stores raw values
// The display side uses a Descriptor class per directory to turn the raw values into 'pretty' descriptions
// this includes exif user comments
directory.SetByteArray(tagType, reader.GetBytes(tagValueOffset, componentCount));
break;
}
case FmtString:
{
string @string = reader.GetNullTerminatedString(tagValueOffset, componentCount);
directory.SetString(tagType, @string);
break;
}
case FmtSrational:
{
if (componentCount == 1)
{
directory.SetRational(tagType, new Rational(reader.GetInt32(tagValueOffset), reader.GetInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] rationals = new Rational[componentCount];
for (int i = 0; i < componentCount; i++)
{
rationals[i] = new Rational(reader.GetInt32(tagValueOffset + (8 * i)), reader.GetInt32(tagValueOffset + 4 + (8 * i)));
}
directory.SetRationalArray(tagType, rationals);
}
}
break;
}
case FmtUrational:
{
if (componentCount == 1)
{
directory.SetRational(tagType, new Rational(reader.GetUInt32(tagValueOffset), reader.GetUInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] rationals = new Rational[componentCount];
for (int i = 0; i < componentCount; i++)
{
rationals[i] = new Rational(reader.GetUInt32(tagValueOffset + (8 * i)), reader.GetUInt32(tagValueOffset + 4 + (8 * i)));
}
directory.SetRationalArray(tagType, rationals);
}
}
break;
}
case FmtSingle:
{
if (componentCount == 1)
{
directory.SetFloat(tagType, reader.GetFloat32(tagValueOffset));
}
else
{
float[] floats = new float[componentCount];
for (int i = 0; i < componentCount; i++)
{
floats[i] = reader.GetFloat32(tagValueOffset + (i * 4));
}
directory.SetFloatArray(tagType, floats);
}
break;
}
case FmtDouble:
{
if (componentCount == 1)
{
directory.SetDouble(tagType, reader.GetDouble64(tagValueOffset));
}
else
{
double[] doubles = new double[componentCount];
for (int i = 0; i < componentCount; i++)
{
doubles[i] = reader.GetDouble64(tagValueOffset + (i * 4));
}
directory.SetDoubleArray(tagType, doubles);
}
break;
}
case FmtSbyte:
{
//
// Note that all integral types are stored as int32 internally (the largest supported by TIFF)
//
if (componentCount == 1)
{
directory.SetInt(tagType, reader.GetInt8(tagValueOffset));
}
else
{
int[] bytes = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
bytes[i] = reader.GetInt8(tagValueOffset + i);
}
directory.SetIntArray(tagType, bytes);
}
break;
}
case FmtByte:
{
if (componentCount == 1)
{
directory.SetInt(tagType, reader.GetUInt8(tagValueOffset));
}
else
{
int[] bytes = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
bytes[i] = reader.GetUInt8(tagValueOffset + i);
}
directory.SetIntArray(tagType, bytes);
}
break;
}
case FmtUshort:
{
if (componentCount == 1)
{
int i = reader.GetUInt16(tagValueOffset);
directory.SetInt(tagType, i);
}
else
{
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = reader.GetUInt16(tagValueOffset + (i * 2));
}
directory.SetIntArray(tagType, ints);
}
break;
}
case FmtSshort:
{
if (componentCount == 1)
{
int i = reader.GetInt16(tagValueOffset);
directory.SetInt(tagType, i);
}
else
{
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = reader.GetInt16(tagValueOffset + (i * 2));
}
directory.SetIntArray(tagType, ints);
}
break;
}
case FmtSlong:
case FmtUlong:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
int i = reader.GetInt32(tagValueOffset);
directory.SetInt(tagType, i);
}
else
{
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = reader.GetInt32(tagValueOffset + (i * 4));
}
directory.SetIntArray(tagType, ints);
}
break;
}
default:
{
directory.AddError("Unknown format code " + formatCode + " for tag " + tagType);
break;
}
}
}
/// <exception cref="System.IO.IOException"/>
private static void ProcessTag(TiffHandler handler, int tagId, int tagValueOffset, int componentCount, int formatCode, RandomAccessReader reader)
{
switch (formatCode)
{
case TiffDataFormat.CodeUndefined:
{
// this includes exif user comments
handler.SetByteArray(tagId, reader.GetBytes(tagValueOffset, componentCount));
break;
}
case TiffDataFormat.CodeString:
{
handler.SetString(tagId, reader.GetNullTerminatedString(tagValueOffset, componentCount));
break;
}
case TiffDataFormat.CodeRationalS:
{
if (componentCount == 1)
{
handler.SetRational(tagId, new Rational(reader.GetInt32(tagValueOffset), reader.GetInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] array = new Rational[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = new Rational(reader.GetInt32(tagValueOffset + (8 * i)), reader.GetInt32(tagValueOffset + 4 + (8 * i)));
}
handler.SetRationalArray(tagId, array);
}
}
break;
}
case TiffDataFormat.CodeRationalU:
{
if (componentCount == 1)
{
handler.SetRational(tagId, new Rational(reader.GetUInt32(tagValueOffset), reader.GetUInt32(tagValueOffset + 4)));
}
else
{
if (componentCount > 1)
{
Rational[] array = new Rational[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = new Rational(reader.GetUInt32(tagValueOffset + (8 * i)), reader.GetUInt32(tagValueOffset + 4 + (8 * i)));
}
handler.SetRationalArray(tagId, array);
}
}
break;
}
case TiffDataFormat.CodeSingle:
{
if (componentCount == 1)
{
handler.SetFloat(tagId, reader.GetFloat32(tagValueOffset));
}
else
{
float[] array = new float[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetFloat32(tagValueOffset + (i * 4));
}
handler.SetFloatArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeDouble:
{
if (componentCount == 1)
{
handler.SetDouble(tagId, reader.GetDouble64(tagValueOffset));
}
else
{
double[] array = new double[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetDouble64(tagValueOffset + (i * 4));
}
handler.SetDoubleArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt8S:
{
if (componentCount == 1)
{
handler.SetInt8s(tagId, reader.GetInt8(tagValueOffset));
}
else
{
sbyte[] array = new sbyte[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt8(tagValueOffset + i);
}
handler.SetInt8sArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt8U:
{
if (componentCount == 1)
{
handler.SetInt8u(tagId, reader.GetUInt8(tagValueOffset));
}
else
{
short[] array = new short[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt8(tagValueOffset + i);
}
handler.SetInt8uArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt16S:
{
if (componentCount == 1)
{
handler.SetInt16s(tagId, (int)reader.GetInt16(tagValueOffset));
}
else
{
short[] array = new short[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt16(tagValueOffset + (i * 2));
}
handler.SetInt16sArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt16U:
{
if (componentCount == 1)
{
handler.SetInt16u(tagId, reader.GetUInt16(tagValueOffset));
}
else
{
int[] array = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt16(tagValueOffset + (i * 2));
}
handler.SetInt16uArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt32S:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
handler.SetInt32s(tagId, reader.GetInt32(tagValueOffset));
}
else
{
int[] array = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt32(tagValueOffset + (i * 4));
}
handler.SetInt32sArray(tagId, array);
}
break;
}
case TiffDataFormat.CodeInt32U:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
handler.SetInt32u(tagId, reader.GetUInt32(tagValueOffset));
}
else
{
long[] array = new long[componentCount];
for (int i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt32(tagValueOffset + (i * 4));
}
handler.SetInt32uArray(tagId, array);
}
break;
}
default:
{
handler.Error(Sharpen.Extensions.StringFormat("Unknown format code %d for tag %d", formatCode, tagId));
break;
}
}
}