Basic query functionality

message_reader.go

@@ -0,0 +1,45 @@
+package pqx
+
+import (
+	"encoding/binary"
+	"bytes"
+)
+
+type messageReader []byte
+
+func newMessageReader(buf []byte) *messageReader {
+	r := messageReader(buf)
+	return &r
+}
+
+func (r *messageReader) readInt16() int16 {
+	n := int16(binary.BigEndian.Uint16((*r)[:2]))
+	*r = (*r)[2:]
+	return n
+}
+
+func (r *messageReader) readInt32() int32 {
+	n := int32(binary.BigEndian.Uint32((*r)[:4]))
+	*r = (*r)[4:]
+	return n
+}
+
+func (r *messageReader) readOid() oid {
+	n := oid(binary.BigEndian.Uint32((*r)[:4]))
+	*r = (*r)[4:]
+	return n
+}
+
+func (r *messageReader) readString() string {
+	n := bytes.IndexByte(*r, 0)
+	s := (*r)[:n]
+	*r = (*r)[n+1:]
+	return string(s)
+}
+
+// Read count bytes and return as string
+func (r *messageReader) readByteString(count int32) string {
+	s := (*r)[:count]
+	*r = (*r)[count:]
+	return string(s)
+}