/
bytes_map.go
63 lines (57 loc) · 1.91 KB
/
bytes_map.go
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// Copyright 2020 DataStax
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package primitive
import (
"fmt"
"io"
)
// [bytes map]
func ReadBytesMap(source io.Reader) (map[string][]byte, error) {
if length, err := ReadShort(source); err != nil {
return nil, fmt.Errorf("cannot read [bytes map] length: %w", err)
} else {
decoded := make(map[string][]byte, length)
for i := uint16(0); i < length; i++ {
if key, err := ReadString(source); err != nil {
return nil, fmt.Errorf("cannot read [bytes map] entry %d key: %w", i, err)
} else if value, err := ReadBytes(source); err != nil {
return nil, fmt.Errorf("cannot read [bytes map] entry %d value: %w", i, err)
} else {
decoded[key] = value
}
}
return decoded, nil
}
}
func WriteBytesMap(m map[string][]byte, dest io.Writer) error {
if err := WriteShort(uint16(len(m)), dest); err != nil {
return fmt.Errorf("cannot write [bytes map] length: %w", err)
}
for key, value := range m {
if err := WriteString(key, dest); err != nil {
return fmt.Errorf("cannot write [bytes map] entry '%v' key: %w", key, err)
}
if err := WriteBytes(value, dest); err != nil {
return fmt.Errorf("cannot write [bytes map] entry '%v' value: %w", value, err)
}
}
return nil
}
func LengthOfBytesMap(m map[string][]byte) int {
length := LengthOfShort
for key, value := range m {
length += LengthOfString(key) + LengthOfBytes(value)
}
return length
}