Merge pull request #5 from WinampDesktop/community

Merge to main

1 files changed, 38 insertions, 0 deletions

diff --git a/Src/WAT/wa_bits_operation.cpp b/Src/WAT/wa_bits_operation.cpp
new file mode 100644
index 00000000..9688cfc6
--- /dev/null
+++ b/Src/WAT/wa_bits_operation.cpp
@@ -0,0 +1,38 @@
+#include "WAT.h"
+
+
+unsigned char* wa::bits_operation::GetBits(unsigned char* Source, unsigned int NbrOfBits, unsigned int* BufferSize)
+{
+	// check for wrong parameter
+	if (Source == nullptr || NbrOfBits == 0 || BufferSize == nullptr)
+		return nullptr;
+
+	// variable
+	unsigned int bitMask = 0;
+	unsigned int nbrOfByteToRead = 1 + (NbrOfBits-1) / 8;
+	unsigned char* bufferToReturn = (unsigned char*)malloc(nbrOfByteToRead);
+	memset(bufferToReturn, 0, nbrOfByteToRead);
+	*BufferSize = nbrOfByteToRead;
+	// copy all bytes 
+	if (nbrOfByteToRead > 1)
+	{
+		memcpy(bufferToReturn, Source, nbrOfByteToRead - 1);
+	}
+	// copy the specific end bits
+	bitMask = (1 << NbrOfBits - ((nbrOfByteToRead - 1)*8)) - 1;
+	bufferToReturn[nbrOfByteToRead - 1] = Source[nbrOfByteToRead - 1] & bitMask;
+	return bufferToReturn;
+}
+
+wa::strings::wa_string wa::bits_operation::PrintInBinary(unsigned char* buffer, unsigned int size)
+{
+	wa::strings::wa_string ToReturn = "";
+	for (unsigned int NbrOfByte = 0; NbrOfByte < size; ++NbrOfByte)
+	{
+		for (int IndexBit = 0; IndexBit < 8; ++IndexBit)
+			ToReturn.append((buffer[NbrOfByte] & (1 << IndexBit)) ? "1" : "0");
+		ToReturn.append(" ' ");
+	}
+	return ToReturn;
+
+}