BufferStream: Add signed int overloads for read/write

This will be required in AudioServer

AK/BufferStream.h

@@ -17,6 +17,21 @@ class BufferStream {
  ASSERT(!m_read_failure);
  }
 
+ BufferStream& operator<<(i8 value)
+ {
+ m_buffer[m_offset++] = value;
+ return *this;
+ }
+ BufferStream& operator>>(i8& value)
+ {
+ if (m_offset + sizeof(value) >= unsigned(m_buffer.size())) {
+ m_read_failure = true;
+ return *this;
+ }
+ value = m_buffer[m_offset++];
+ return *this;
+ }
+
  BufferStream& operator<<(u8 value)
  {
  m_buffer[m_offset++] = value;
@@ -67,6 +82,26 @@ class BufferStream {
  return *this;
  }
 
+ BufferStream& operator<<(i16 value)
+ {
+ m_buffer[m_offset++] = value;
+ m_buffer[m_offset++] = (u8)(value >> 8);
+ return *this;
+ }
+ BufferStream& operator>>(i16& value)
+ {
+ if (m_offset + sizeof(value) >= unsigned(m_buffer.size())) {
+ m_read_failure = true;
+ return *this;
+ }
+ value = 0;
+ u8 b0 = m_buffer[m_offset++];
+ u8 b1 = m_buffer[m_offset++];
+ value |= (u8(b1) << 8);
+ value |= (u8(b0));
+ return *this;
+ }
+
  BufferStream& operator<<(u32 value)
  {
  m_buffer[m_offset++] = value;
@@ -93,6 +128,32 @@ class BufferStream {
  value |= (u8(b0));
  return *this;
  }
+ BufferStream& operator<<(i32 value)
+ {
+ m_buffer[m_offset++] = value;
+ m_buffer[m_offset++] = (u8)(value >> 8);
+ m_buffer[m_offset++] = (u8)(value >> 16);
+ m_buffer[m_offset++] = (u8)(value >> 24);
+ return *this;
+ }
+ BufferStream& operator>>(i32& value)
+ {
+ if (m_offset + sizeof(value) >= unsigned(m_buffer.size())) {
+ m_read_failure = true;
+ return *this;
+ }
+ u8 b0 = m_buffer[m_offset++];
+ u8 b1 = m_buffer[m_offset++];
+ u8 b2 = m_buffer[m_offset++];
+ u8 b3 = m_buffer[m_offset++];
+
+ value = 0;
+ value |= (u8(b3) << 24);
+ value |= (u8(b2) << 16);
+ value |= (u8(b1) << 8);
+ value |= (u8(b0));
+ return *this;
+ }
 
  BufferStream& operator<<(const StringView& value)
  {