/*----------------------------------------------------------------------------
* %%Function: StmCreateFromString
* %%Qualified: TCore.Debug.DebugStream.StmCreateFromString
* %%Contact: rlittle
*
* it turns out, writing a string to a file in .net isn't as simple as you
* would think. The strings are unicode, and you were probably thinking
* about just plain ascii. so, this will create a stream the way you think
* it would (converting the ascii to bytes, and encoding \n as CRLF
* (0x0d0x0a)
* ----------------------------------------------------------------------------*/
public static DebugStream StmCreateFromString(string s)
{
DebugStream stm = new DebugStream();
foreach (char ch in s)
{
switch (ch)
{
case '\n':
stm.Write(new byte[] { 0x0d, 0x0a }, 0, 2);
break;
case (char)0x240d:
stm.Write(new byte[] { 0x0d }, 0, 1);
break;
case (char)0x240a:
stm.Write(new byte[] { 0x0a }, 0, 1);
break;
default:
stm.WriteByte((byte)ch);
break;
}
}
return(stm);
}
public static void TestStreamWriteToLimitOfAllocBuffer_WriteAgainToGrowBuffer()
{
DebugStream stm = new DebugStream();
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
// write at the very end (but not over)
stm.Position = 1014;
stm.Write(rgbWrite, 0, 10);
Assert.AreEqual(1024, stm.m_cbStream);
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
stm.Position = 1014;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
// and now lets make sure the initial write has been preserved
stm.Position = 1024;
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
TestStreamWrite_WriteBeyondInitialAllocatedBuffer() // check that we reallocated teh buffer and retained its contents correctly
{
DebugStream stm = new DebugStream();
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
// write at the beginning (to make sure its retained)
stm.Write(rgbWrite, 0, 10);
stm.Position = 1020;
Assert.AreEqual(1024, stm.m_cbStream);
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
stm.Position = 1020;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
// and now lets make sure the initial write has been preserved
stm.Position = 0;
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamSetLengthBeyondInitialAllocatedBuffer_WriteBeyondInitialAllocatedBuffer()
{
DebugStream stm = new DebugStream();
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
// write at the very end (but not over)
stm.Position = 2048;
Assert.AreEqual(0, stm.Length);
Assert.AreEqual(1024, stm.m_cbStream);
Assert.AreEqual(2048, stm.Position);
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
Assert.AreEqual(2058, stm.Length);
Assert.AreEqual(2058, stm.Position);
stm.Position = 2048;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
static DebugStream StmInit(string sInit)
{
DebugStream stm = new DebugStream();
stm.Write(Encoding.UTF8.GetBytes(sInit), 0, sInit.Length);
return(stm);
}
TestStreamWriteBeyondInitialAllocatedBuffer() // check that we reallocated teh buffer and retained its contents correctly
{
DebugStream stm = new DebugStream();
stm.Position = 1020;
Assert.AreEqual(1024, stm.m_cbStream);
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
stm.Position = 1020;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamWrite_SeekBack_WriteNoGrowFile()
{
DebugStream stm = StmInit("0123456789");
stm.Seek(-4, SeekOrigin.Current);
byte[] rgbWrite = new byte[2] {
65, 66
};
stm.Write(rgbWrite, 0, 2);
Assert.AreEqual(8, stm.Position);
Assert.AreEqual(10, stm.Length);
stm.Position = 0;
byte[] rgbExpected = Encoding.UTF8.GetBytes("012345AB89");
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamWrite_SeekBack_WriteGrowFile() // check that length and position are correct
{
DebugStream stm = StmInit("0123456789");
stm.Seek(-2, SeekOrigin.Current);
byte[] rgbWrite = new byte[3] {
65, 66, 67
};
stm.Write(rgbWrite, 0, 3);
Assert.AreEqual(11, stm.Position);
Assert.AreEqual(11, stm.Length);
stm.Position = 0;
byte[] rgbExpected = Encoding.UTF8.GetBytes("01234567ABC");
byte[] rgbRead = new byte[11];
Assert.AreEqual(11, stm.Read(rgbRead, 0, 11));
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamSetLength_SeekIntoSpace_WriteIntoSpaceGrow()
{
DebugStream stm = new DebugStream();
stm.SetLength(20);
stm.Position = 18;
Assert.AreEqual(18, stm.Position);
Assert.AreEqual(20, stm.Length);
byte[] rgbWrite = new byte[6] {
65, 66, 67, 68, 69, 70
};
stm.Write(rgbWrite, 0, 6);
Assert.AreEqual(24, stm.Position);
Assert.AreEqual(24, stm.Length);
stm.Position = 18;
byte[] rgbRead = new byte[6];
Assert.AreEqual(6, stm.Read(rgbRead, 0, 6));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamSetLength_SeekIntoSpace_WriteIntoSpaceNoGrow()
{
DebugStream stm = new DebugStream();
stm.SetLength(20);
stm.Position = 10;
Assert.AreEqual(10, stm.Position);
Assert.AreEqual(20, stm.Length);
byte[] rgbWrite = new byte[2] {
65, 66
};
stm.Write(rgbWrite, 0, 2);
Assert.AreEqual(12, stm.Position);
Assert.AreEqual(20, stm.Length);
stm.Position = 10;
byte[] rgbRead = new byte[2];
Assert.AreEqual(2, stm.Read(rgbRead, 0, 2));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamSeekBeyondEnd_Write()
{
DebugStream stm = new DebugStream();
stm.Position = 2;
Assert.AreEqual(2, stm.Position);
Assert.AreEqual(0, stm.Length);
byte[] rgbWrite = new byte[6] {
65, 66, 67, 68, 69, 70
};
stm.Write(rgbWrite, 0, 6);
Assert.AreEqual(8, stm.Position);
Assert.AreEqual(8, stm.Length);
stm.Position = 0;
byte[] rgbRead = new byte[8];
Assert.AreEqual(8, stm.Read(rgbRead, 0, 8));
byte[] rgbExpected = { 0, 0, 65, 66, 67, 68, 69, 70 };
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamWrite_SetLengthTruncate_Write()
{
DebugStream stm = StmInit("0123456789");
stm.SetLength(5);
Assert.AreEqual(10, stm.Position);
Assert.AreEqual(5, stm.Length);
byte[] rgbWrite = new byte[2] {
65, 66
};
stm.Write(rgbWrite, 0, 2);
Assert.AreEqual(12, stm.Position);
Assert.AreEqual(12, stm.Length);
stm.Position = 0;
byte[] rgbRead = new byte[12];
Assert.AreEqual(12, stm.Read(rgbRead, 0, 12));
byte[] rgbExpected = new byte[] { 48, 49, 50, 51, 52, 0, 0, 0, 0, 0, 65, 66 };
Assert.AreEqual(rgbExpected, rgbRead);
}