Add source code for ctrtool

ctrtool/deps/libtoolchain/src/io/PaddingSource.cpp

@@ -0,0 +1,34 @@
+#include <tc/io/PaddingSource.h>
+#include <tc/io/IOUtil.h>
+
+const std::string tc::io::PaddingSource::kClassName = "tc::io::PaddingSource";
+
+tc::io::PaddingSource::PaddingSource() :
+	mSourceLength(0),
+	mPaddingByte(0)
+{
+}
+
+tc::io::PaddingSource::PaddingSource(byte_t padding_byte, int64_t size) :
+	mSourceLength(size),
+	mPaddingByte(padding_byte)
+{
+	if (size < 0)
+	{
+		throw tc::ArgumentOutOfRangeException(kClassName, "length is negative");
+	}
+}
+
+int64_t tc::io::PaddingSource::length()
+{
+	return mSourceLength;
+}
+
+tc::ByteData tc::io::PaddingSource::pullData(int64_t offset, size_t count)
+{
+	tc::ByteData data(IOUtil::getReadableCount(mSourceLength, offset, count));
+
+	memset(data.data(), mPaddingByte, data.size());
+	
+	return data;
+}