add preliminary xdr input driver

1 files changed, 51 insertions, 0 deletions

diff --git a/src/os/object/xdrinput.cc b/src/os/object/xdrinput.cc
new file mode 100644
index 0000000..561c779
--- /dev/null
+++ b/src/os/object/xdrinput.cc
@@ -0,0 +1,51 @@
+#include "object/xdrinput.h"
+
+uint32_t XDRInput::get_uint32()
+{
+	uint32_t ret = ((uint8_t)data[pos]<<24) | ((uint8_t)data[pos+1]<<16)
+		| ((uint8_t)data[pos+2]<<8) | (uint8_t)data[pos+3];
+	pos += 4;
+	return ret;
+}
+
+int32_t XDRInput::get_int32()
+{
+	int32_t ret = (data[pos]<<24) | (data[pos+1]<<16) | (data[pos+2]<<8) | data[pos+3];
+	pos += 4;
+	return ret;
+}
+
+uint64_t XDRInput::get_uint64()
+{
+	uint64_t ret0 = ((uint8_t)data[pos]<<24) | ((uint8_t)data[pos+1]<<16)
+		| ((uint8_t)data[pos+2]<<8) | (uint8_t)data[pos+3];
+	pos += 4;
+	uint64_t ret1 = ((uint8_t)data[pos]<<24) | ((uint8_t)data[pos+1]<<16)
+		| ((uint8_t)data[pos+2]<<8) | (uint8_t)data[pos+3];
+	pos += 4;
+	return (ret0 << 32) | ret1;
+}
+
+int64_t XDRInput::get_int64()
+{
+	int64_t ret0 = (data[pos]<<24) | (data[pos+1]<<16) | (data[pos+2]<<8) | data[pos+3];
+	pos += 4;
+	int64_t ret1 = (data[pos]<<24) | (data[pos+1]<<16) | (data[pos+2]<<8) | data[pos+3];
+	pos += 4;
+	return (ret0 << 32) | ret1;
+}
+
+uint32_t XDRInput::get_opaque_length()
+{
+	return get_uint32();
+}
+
+char *XDRInput::get_opaque(uint32_t length)
+{
+	char *ret = data + pos;
+	pos += length;
+	if (length % 4) {
+		pos += 4 - (length % 4);
+	}
+	return ret;
+}