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package ini
import (
"bufio"
"bytes"
"fmt"
"io/ioutil"
"os"
"regexp"
"strconv"
"strings"
"unicode"
)
type Dict map[string]map[string]string
type Error string
var (
regDoubleQuote = regexp.MustCompile("^([^= \t]+)[ \t]*=[ \t]*\"([^\"]*)\"$")
regSingleQuote = regexp.MustCompile("^([^= \t]+)[ \t]*=[ \t]*'([^']*)'$")
regNoQuote = regexp.MustCompile("^([^= \t]+)[ \t]*=[ \t]*([^#;]+)")
regNoValue = regexp.MustCompile("^([^= \t]+)[ \t]*=[ \t]*([#;].*)?")
)
func Load(filename string) (dict Dict, err error) {
file, err := os.Open(filename)
if err != nil {
return nil, err
}
defer file.Close()
dict = make(map[string]map[string]string)
reader := bufio.NewReader(file)
lineno := 0
section := ""
dict[section] = make(map[string]string)
for err == nil {
l, _, err := reader.ReadLine()
if err != nil {
break
}
lineno++
if len(l) == 0 {
continue
}
line := strings.TrimFunc(string(l), unicode.IsSpace)
for line[len(line)-1] == '\\' {
line = line[:len(line)-1]
l, _, err := reader.ReadLine()
if err != nil {
return nil, err
}
line += strings.TrimFunc(string(l), unicode.IsSpace)
}
section, err = dict.parseLine(section, line)
if err != nil {
return nil, newError(
err.Error() + fmt.Sprintf("'%s:%d'.", filename, lineno))
}
}
return
}
func Write(filename string, dict *Dict) error {
buffer := dict.format()
return ioutil.WriteFile(filename, buffer.Bytes(), 0644)
}
func (e Error) Error() string {
return string(e)
}
func (dict Dict) parseLine(section, line string) (string, error) {
// commets
if line[0] == '#' || line[0] == ';' {
return section, nil
}
// section name
if line[0] == '[' && line[len(line)-1] == ']' {
section := strings.TrimFunc(line[1:len(line)-1], unicode.IsSpace)
section = strings.ToLower(section)
dict[section] = make(map[string]string)
return section, nil
}
// key = value
if m := regDoubleQuote.FindAllStringSubmatch(line, 1); m != nil {
dict.add(section, m[0][1], m[0][2])
return section, nil
} else if m = regSingleQuote.FindAllStringSubmatch(line, 1); m != nil {
dict.add(section, m[0][1], m[0][2])
return section, nil
} else if m = regNoQuote.FindAllStringSubmatch(line, 1); m != nil {
dict.add(section, m[0][1], strings.TrimFunc(m[0][2], unicode.IsSpace))
return section, nil
} else if m = regNoValue.FindAllStringSubmatch(line, 1); m != nil {
dict.add(section, m[0][1], "")
return section, nil
}
return section, newError("iniparser: syntax error at ")
}
func (dict Dict) add(section, key, value string) {
key = strings.ToLower(key)
dict[section][key] = value
}
func (dict Dict) GetBool(section, key string) (bool, bool) {
sec, ok := dict[section]
if !ok {
return false, false
}
value, ok := sec[key]
if !ok {
return false, false
}
v := value[0]
if v == 'y' || v == 'Y' || v == '1' || v == 't' || v == 'T' {
return true, true
}
if v == 'n' || v == 'N' || v == '0' || v == 'f' || v == 'F' {
return false, true
}
return false, false
}
func (dict Dict) SetBool(section, key string, value bool) {
dict.SetString(section, key, strconv.FormatBool(value))
}
func (dict Dict) GetString(section, key string) (string, bool) {
sec, ok := dict[section]
if !ok {
return "", false
}
value, ok := sec[key]
if !ok {
return "", false
}
return value, true
}
func (dict Dict) SetString(section, key, value string) {
_, ok := dict[section]
if !ok {
dict[section] = make(map[string]string)
}
dict[section][key] = value
}
func (dict Dict) GetInt(section, key string) (int, bool) {
sec, ok := dict[section]
if !ok {
return 0, false
}
value, ok := sec[key]
if !ok {
return 0, false
}
i, err := strconv.Atoi(value)
if err != nil {
return 0, false
}
return i, true
}
func (dict Dict) SetInt(section, key string, value int) {
dict.SetString(section, key, strconv.FormatInt(int64(value), 10))
}
func (dict Dict) GetDouble(section, key string) (float64, bool) {
sec, ok := dict[section]
if !ok {
return 0, false
}
value, ok := sec[key]
if !ok {
return 0, false
}
d, err := strconv.ParseFloat(value, 64)
if err != nil {
return 0, false
}
return d, true
}
func (dict Dict) SetDouble(section, key string, value float64) {
dict.SetString(section, key, strconv.FormatFloat(value, 'f', -1, 64))
}
func (dict Dict) Delete(section, key string) {
_, ok := dict[section]
if !ok {
return
}
delete(dict[section], key)
// If there are no items left in the section,
// delete the section.
if len(dict[section]) == 0 {
delete(dict, section)
}
}
func (dict Dict) GetSections() []string {
size := len(dict)
sections := make([]string, size)
i := 0
for section, _ := range dict {
sections[i] = section
i++
}
return sections
}
func (dict Dict) String() string {
return (*dict.format()).String()
}
func (dict Dict) format() *bytes.Buffer {
var buffer bytes.Buffer
for section, vals := range dict {
if section != "" {
buffer.WriteString(fmt.Sprintf("[%s]\n", section))
}
for key, val := range vals {
buffer.WriteString(fmt.Sprintf("%s = %s\n", key, val))
}
buffer.WriteString("\n")
}
return &buffer
}
func newError(message string) (e error) {
return Error(message)
}
|
