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/*
* Copyright (C) 2017 ~ 2018 Deepin Technology Co., Ltd.
*
* Author: jouyouyun <jouyouwen717@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package keyfile
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
"os"
"strings"
"unicode"
)
func (f *KeyFile) LoadFromReader(reader io.Reader) error {
var comments string
var section string
// Parse line by line
scanner := bufio.NewScanner(reader)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
lineLength := len(line)
switch {
case lineLength == 0 || line[0] == '#': // Comment
// Append comments
if len(comments) == 0 {
comments = line
} else {
comments += (LineBreak + line)
}
continue
case line[0] == '[' && line[lineLength-1] == ']': // New section
section = strings.TrimSpace(line[1 : lineLength-1])
if len(section) == 0 {
return BlankSectionNameError{}
}
if len(comments) > 0 {
f.SetSectionComments(section, comments)
comments = ""
}
continue
default:
idx := strings.IndexRune(line, '=')
if idx == -1 {
return ParseError{line}
}
if section == "" {
return EntryNotInSectionError{line}
}
key := strings.TrimRightFunc(line[:idx], unicode.IsSpace)
if key == "" {
return errEmptyKey
}
if f.keyReg != nil {
if !f.keyReg.MatchString(key) {
return InvalidKeyError{key}
}
}
value := strings.TrimLeftFunc(line[idx+1:], unicode.IsSpace)
f.SetValue(section, key, value)
if len(comments) > 0 {
f.SetKeyComments(section, key, comments)
comments = ""
}
}
}
return nil
}
func (f *KeyFile) LoadFromData(data []byte) error {
return f.LoadFromReader(bytes.NewBuffer(data))
}
func (f *KeyFile) LoadFromFile(filename string) error {
fh, err := os.Open(filename)
if err != nil {
return err
}
defer fh.Close()
return f.LoadFromReader(bufio.NewReader(fh))
}
type BlankSectionNameError struct{}
func (err BlankSectionNameError) Error() string {
return "empty section name not allowed"
}
type EntryNotInSectionError struct {
Line string
}
func (err EntryNotInSectionError) Error() string {
return fmt.Sprintf("entry %q not in any section", err.Line)
}
type InvalidKeyError struct {
Key string
}
func (err InvalidKeyError) Error() string {
return fmt.Sprintf("invalid key name %q", err.Key)
}
var errEmptyKey = errors.New("key is empty")
type ParseError struct {
Line string
}
func (err ParseError) Error() string {
return fmt.Sprintf("could not parse line: %q", err.Line)
}
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