/
object_ini.go
103 lines (80 loc) · 1.76 KB
/
object_ini.go
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package codec
import (
"bufio"
"bytes"
"fmt"
"regexp"
"sort"
"strconv"
"strings"
)
var _ = DefaultObject.
Register("ini", Object{
Type: "ini",
Marshal: ini.Marshal,
Unmarshal: ini.Unmarshal,
})
var ini = encini{
key: regexp.MustCompile(`^[a-zA-Z_0-9]+$`),
}
type encini struct {
key *regexp.Regexp
}
func (encini) Marshal(v interface{}) ([]byte, error) {
obj, keys, err := toobj(v)
if err != nil {
return nil, err
}
var buf bytes.Buffer
for _, k := range keys {
fmt.Fprintf(&buf, "%s=%q\n", k, fmt.Sprint(obj[k]))
}
return buf.Bytes(), nil
}
func (e encini) Unmarshal(p []byte, v interface{}) error {
s := bufio.NewScanner(bytes.NewReader(p))
obj := make(map[string]string)
for i := 0; s.Scan(); i++ {
line := strings.TrimSpace(s.Text())
if line == "" || strings.HasPrefix(line, "#") {
continue
}
j := strings.IndexRune(line, '=')
if j == -1 {
return fmt.Errorf("unable to parse line %d: %q", i, line)
}
k := strings.TrimSpace(line[:j])
v := strings.TrimSpace(line[j+1:])
if !e.key.MatchString(k) {
return fmt.Errorf("invalid key at line %d: %q", i, k)
}
if s, err := strconv.Unquote(v); err == nil {
v = s
}
obj[k] = v
}
return reencode(obj, v)
}
func toobj(v interface{}) (m map[string]interface{}, keys []string, err error) {
switch v := v.(type) {
case map[string]interface{}:
m = v
case map[interface{}]interface{}:
m = make(map[string]interface{}, len(v))
for k, v := range v {
m[fmt.Sprint(k)] = v
}
default:
if err := reencode(v, &m); err != nil {
return nil, nil, err
}
if len(m) == 0 {
return nil, nil, fmt.Errorf("value is neither struct nor non-empty map: %T", v)
}
}
for k := range m {
keys = append(keys, k)
}
sort.Strings(keys)
return m, keys, nil
}