Microsoft SQL Server driver and prep

vendor/github.com/denisenkom/go-mssqldb/rpc.go

@@ -0,0 +1,89 @@
+package mssql
+
+import (
+	"encoding/binary"
+)
+
+type procId struct {
+	id   uint16
+	name string
+}
+
+// parameter flags
+const (
+	fByRevValue   = 1
+	fDefaultValue = 2
+)
+
+type param struct {
+	Name   string
+	Flags  uint8
+	ti     typeInfo
+	buffer []byte
+}
+
+const (
+	fWithRecomp    = 1
+	fNoMetaData    = 2
+	fReuseMetaData = 4
+)
+
+var (
+	sp_Cursor          = procId{1, ""}
+	sp_CursorOpen      = procId{2, ""}
+	sp_CursorPrepare   = procId{3, ""}
+	sp_CursorExecute   = procId{4, ""}
+	sp_CursorPrepExec  = procId{5, ""}
+	sp_CursorUnprepare = procId{6, ""}
+	sp_CursorFetch     = procId{7, ""}
+	sp_CursorOption    = procId{8, ""}
+	sp_CursorClose     = procId{9, ""}
+	sp_ExecuteSql      = procId{10, ""}
+	sp_Prepare         = procId{11, ""}
+	sp_PrepExec        = procId{13, ""}
+	sp_PrepExecRpc     = procId{14, ""}
+	sp_Unprepare       = procId{15, ""}
+)
+
+// http://msdn.microsoft.com/en-us/library/dd357576.aspx
+func sendRpc(buf *tdsBuffer, headers []headerStruct, proc procId, flags uint16, params []param, resetSession bool) (err error) {
+	buf.BeginPacket(packRPCRequest, resetSession)
+	writeAllHeaders(buf, headers)
+	if len(proc.name) == 0 {
+		var idswitch uint16 = 0xffff
+		err = binary.Write(buf, binary.LittleEndian, &idswitch)
+		if err != nil {
+			return
+		}
+		err = binary.Write(buf, binary.LittleEndian, &proc.id)
+		if err != nil {
+			return
+		}
+	} else {
+		err = writeUsVarChar(buf, proc.name)
+		if err != nil {
+			return
+		}
+	}
+	err = binary.Write(buf, binary.LittleEndian, &flags)
+	if err != nil {
+		return
+	}
+	for _, param := range params {
+		if err = writeBVarChar(buf, param.Name); err != nil {
+			return
+		}
+		if err = binary.Write(buf, binary.LittleEndian, param.Flags); err != nil {
+			return
+		}
+		err = writeTypeInfo(buf, &param.ti)
+		if err != nil {
+			return
+		}
+		err = param.ti.Writer(buf, param.ti, param.buffer)
+		if err != nil {
+			return
+		}
+	}
+	return buf.FinishPacket()
+}