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encode_string.go
45 lines (37 loc) · 948 Bytes
/
encode_string.go
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package msgpack
// MarshalString returns string value as msgpack format.
func MarshalString(v string) ([]byte, error) {
return NewEncoder(nil).encodeString(v)
}
// PutString puts string variable to encoder.
func (e *Encoder) PutString(v string) (err error) {
e.encodeKey()
_, err = e.encodeString(v)
return
}
func (e *Encoder) encodeString(v string) ([]byte, error) {
strlen := len(v)
switch {
case strlen <= fixstrMaxLen:
e.grow(strlen + 1)
e.writeByte(fixstrPrefix | byte(strlen))
e.writeString(v)
case strlen <= str8MaxLen:
e.grow(strlen + 2)
e.writeBytes([]byte{String8, byte(strlen)})
e.writeString(v)
case strlen <= str16MaxLen:
e.grow(strlen + 3)
e.writeByte(String16)
e.writeUint16(uint16(strlen))
e.writeString(v)
case strlen <= str32MaxLen:
e.grow(strlen + 5)
e.writeByte(String32)
e.writeUint32(uint32(strlen))
e.writeString(v)
default:
e.err = ErrTooLongString
}
return e.buf, e.err
}