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

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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
}
func MakeProcId(name string) (res ProcId) {
res.name = name
if len(name) == 0 {
panic("Proc name shouln't be empty")
}
if len(name) >= 0xffff {
panic("Invalid length of procedure name, should be less than 0xffff")
}
return res
}
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) (err error) {
buf.BeginPacket(packRPCRequest)
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()
}