Merge branch 'xenia-canary:canary_experimental' into command_processor_optimizations

src/xenia/base/bit_stream.cc

@@ -29,6 +29,16 @@ void BitStream::SetOffset(size_t offset_bits) {
 
 size_t BitStream::BitsRemaining() { return size_bits_ - offset_bits_; }
 
+bool BitStream::IsOffsetValid(size_t num_bits) {
+  size_t offset_bytes = offset_bits_ >> 3;
+  size_t rel_offset_bits = offset_bits_ - (offset_bytes << 3);
+
+  if (rel_offset_bits && int32_t(num_bits - 8 - rel_offset_bits) < 0) {
+    return false;
+  }
+  return true;
+}
+
 uint64_t BitStream::Peek(size_t num_bits) {
   // FYI: The reason we can't copy more than 57 bits is:
   // 57 = 7 * 8 + 1 - that can only span a maximum of 8 bytes.

src/xenia/base/bit_stream.h

@@ -28,6 +28,7 @@ class BitStream {
   void Advance(size_t num_bits);
   void SetOffset(size_t offset_bits);
   size_t BitsRemaining();
+  bool IsOffsetValid(size_t num_bits);
 
   // Note: num_bits MUST be in the range 0-57 (inclusive)
   uint64_t Peek(size_t num_bits);