mirror of
https://github.com/astaxie/beego.git
synced 2024-11-25 16:40:55 +00:00
434 lines
8.9 KiB
Go
434 lines
8.9 KiB
Go
package goyaml2
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"github.com/wendal/errors"
|
|
"io"
|
|
"log"
|
|
"strings"
|
|
)
|
|
|
|
const (
|
|
DEBUG = true
|
|
MAP_KEY_ONLY = iota
|
|
)
|
|
|
|
func Read(r io.Reader) (interface{}, error) {
|
|
yr := &yamlReader{}
|
|
yr.br = bufio.NewReader(r)
|
|
obj, err := yr.ReadObject(0)
|
|
if err == io.EOF {
|
|
err = nil
|
|
}
|
|
if obj == nil {
|
|
log.Println("Obj == nil")
|
|
}
|
|
return obj, err
|
|
}
|
|
|
|
type yamlReader struct {
|
|
br *bufio.Reader
|
|
nodes []interface{}
|
|
lineNum int
|
|
lastLine string
|
|
}
|
|
|
|
func (y *yamlReader) ReadObject(minIndent int) (interface{}, error) {
|
|
line, err := y.NextLine()
|
|
if err != nil {
|
|
if err == io.EOF && line != "" {
|
|
//log.Println("Read EOF , but still some data here")
|
|
} else {
|
|
//log.Println("ReadERR", err)
|
|
return nil, err
|
|
}
|
|
}
|
|
y.lastLine = line
|
|
indent, str := getIndent(line)
|
|
if indent < minIndent {
|
|
//log.Println("Current Indent Unexpect : ", str, indent, minIndent)
|
|
return nil, y.Error("Unexpect Indent", nil)
|
|
}
|
|
if indent > minIndent {
|
|
//log.Println("Change minIndent from %d to %d", minIndent, indent)
|
|
minIndent = indent
|
|
}
|
|
switch str[0] {
|
|
case '-':
|
|
return y.ReadList(minIndent)
|
|
case '[':
|
|
fallthrough
|
|
case '{':
|
|
y.lastLine = ""
|
|
_, value, err := y.asMapKeyValue("tmp:" + str)
|
|
if err != nil {
|
|
return nil, y.Error("Err inline map/list", nil)
|
|
}
|
|
return value, nil
|
|
}
|
|
//log.Println("Read Objcet as Map", indent, str)
|
|
|
|
return y.ReadMap(minIndent)
|
|
|
|
}
|
|
|
|
func (y *yamlReader) ReadList(minIndent int) ([]interface{}, error) {
|
|
list := []interface{}{}
|
|
for {
|
|
line, err := y.NextLine()
|
|
if err != nil {
|
|
return list, err
|
|
}
|
|
indent, str := getIndent(line)
|
|
switch {
|
|
case indent < minIndent:
|
|
y.lastLine = line
|
|
if len(list) == 0 {
|
|
return nil, nil
|
|
}
|
|
return list, nil
|
|
case indent == minIndent:
|
|
if str[0] != '-' {
|
|
y.lastLine = line
|
|
return list, nil
|
|
}
|
|
if len(str) < 2 {
|
|
return nil, y.Error("ListItem is Emtry", nil)
|
|
}
|
|
key, value, err := y.asMapKeyValue(str[1:])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
switch value {
|
|
case nil:
|
|
list = append(list, key)
|
|
case MAP_KEY_ONLY:
|
|
return nil, y.Error("Not support List-Map yet", nil)
|
|
default:
|
|
_map := map[string]interface{}{key.(string): value}
|
|
list = append(list, _map)
|
|
|
|
_line, _err := y.NextLine()
|
|
if _err != nil && _err != io.EOF {
|
|
return nil, err
|
|
}
|
|
if _line == "" {
|
|
return list, nil
|
|
}
|
|
y.lastLine = _line
|
|
_indent, _str := getIndent(line)
|
|
if _indent >= minIndent+2 {
|
|
switch _str[0] {
|
|
case '-':
|
|
return nil, y.Error("Unexpect", nil)
|
|
case '[':
|
|
return nil, y.Error("Unexpect", nil)
|
|
case '{':
|
|
return nil, y.Error("Unexpect", nil)
|
|
}
|
|
// look like a map
|
|
_map2, _err := y.ReadMap(_indent)
|
|
if _map2 != nil {
|
|
_map2[key.(string)] = value
|
|
}
|
|
if err != nil {
|
|
return list, _err
|
|
}
|
|
}
|
|
}
|
|
continue
|
|
default:
|
|
return nil, y.Error("Bad Indent\n"+line, nil)
|
|
}
|
|
}
|
|
panic("ERROR")
|
|
return nil, errors.New("Impossible")
|
|
}
|
|
|
|
func (y *yamlReader) ReadMap(minIndent int) (map[string]interface{}, error) {
|
|
_map := map[string]interface{}{}
|
|
//log.Println("ReadMap", minIndent)
|
|
OUT:
|
|
for {
|
|
line, err := y.NextLine()
|
|
if err != nil {
|
|
return _map, err
|
|
}
|
|
indent, str := getIndent(line)
|
|
//log.Printf("Indent : %d, str = %s", indent, str)
|
|
switch {
|
|
case indent < minIndent:
|
|
y.lastLine = line
|
|
if len(_map) == 0 {
|
|
return nil, nil
|
|
}
|
|
return _map, nil
|
|
case indent == minIndent:
|
|
key, value, err := y.asMapKeyValue(str)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
//log.Println("Key=", key, "value=", value)
|
|
switch value {
|
|
case nil:
|
|
return nil, y.Error("Unexpect", nil)
|
|
case MAP_KEY_ONLY:
|
|
//log.Println("KeyOnly, read inner Map", key)
|
|
|
|
//--------------------------------------
|
|
_line, err := y.NextLine()
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
if _line == "" {
|
|
// Emtry map item?
|
|
_map[key.(string)] = nil
|
|
return _map, err
|
|
}
|
|
} else {
|
|
return nil, y.Error("ERR?", err)
|
|
}
|
|
}
|
|
y.lastLine = _line
|
|
_indent, _str := getIndent(_line)
|
|
if _indent < minIndent {
|
|
return _map, nil
|
|
}
|
|
////log.Println("##>>", _indent, _str)
|
|
if _indent == minIndent {
|
|
if _str[0] == '-' {
|
|
//log.Println("Read Same-Indent ListItem for Map")
|
|
_list, err := y.ReadList(minIndent)
|
|
if _list != nil {
|
|
_map[key.(string)] = _list
|
|
}
|
|
if err != nil {
|
|
return _map, nil
|
|
}
|
|
continue OUT
|
|
} else {
|
|
// Emtry map item?
|
|
_map[key.(string)] = nil
|
|
continue OUT
|
|
}
|
|
}
|
|
//--------------------------------------
|
|
//log.Println("Read Map Item", _indent, _str)
|
|
|
|
obj, err := y.ReadObject(_indent)
|
|
if obj != nil {
|
|
_map[key.(string)] = obj
|
|
}
|
|
if err != nil {
|
|
return _map, err
|
|
}
|
|
default:
|
|
_map[key.(string)] = value
|
|
}
|
|
default:
|
|
//log.Println("Bad", indent, str)
|
|
return nil, y.Error("Bad Indent\n"+line, nil)
|
|
}
|
|
}
|
|
panic("ERROR")
|
|
return nil, errors.New("Impossible")
|
|
|
|
}
|
|
|
|
func (y *yamlReader) NextLine() (line string, err error) {
|
|
if y.lastLine != "" {
|
|
line = y.lastLine
|
|
y.lastLine = ""
|
|
//log.Println("Return lastLine", line)
|
|
return
|
|
}
|
|
for {
|
|
line, err = y.br.ReadString('\n')
|
|
y.lineNum++
|
|
if err != nil {
|
|
return
|
|
}
|
|
if strings.HasPrefix(line, "---") || strings.HasPrefix(line, "#") {
|
|
continue
|
|
}
|
|
|
|
line = strings.TrimRight(line, "\n\t\r ")
|
|
if line == "" {
|
|
continue
|
|
}
|
|
//log.Println("Return Line", line)
|
|
return
|
|
}
|
|
//log.Println("Impossbible : " + line)
|
|
return // impossbile!
|
|
}
|
|
|
|
func getIndent(str string) (int, string) {
|
|
indent := 0
|
|
for i, s := range str {
|
|
switch s {
|
|
case ' ':
|
|
indent++
|
|
case '\t':
|
|
indent += 4
|
|
default:
|
|
return indent, str[i:]
|
|
}
|
|
}
|
|
panic("Invalid indent : " + str)
|
|
return -1, ""
|
|
}
|
|
|
|
func (y *yamlReader) asMapKeyValue(str string) (key interface{}, val interface{}, err error) {
|
|
tokens := splitToken(str)
|
|
key = tokens[0]
|
|
if len(tokens) == 1 {
|
|
return key, nil, nil
|
|
}
|
|
if tokens[1] != ":" {
|
|
return "", nil, y.Error("Unexpect "+str, nil)
|
|
}
|
|
|
|
if len(tokens) == 2 {
|
|
return key, MAP_KEY_ONLY, nil
|
|
}
|
|
if len(tokens) == 3 {
|
|
return key, tokens[2], nil
|
|
}
|
|
switch tokens[2] {
|
|
case "[":
|
|
list := []interface{}{}
|
|
for i := 3; i < len(tokens)-1; i++ {
|
|
list = append(list, tokens[i])
|
|
}
|
|
return key, list, nil
|
|
case "{":
|
|
_map := map[string]interface{}{}
|
|
for i := 3; i < len(tokens)-1; i += 4 {
|
|
//log.Println(">>>", i, tokens[i])
|
|
if i > len(tokens)-2 {
|
|
return "", nil, y.Error("Unexpect "+str, nil)
|
|
}
|
|
if tokens[i+1] != ":" {
|
|
return "", nil, y.Error("Unexpect "+str, nil)
|
|
}
|
|
_map[tokens[i].(string)] = tokens[i+2]
|
|
if (i + 3) < (len(tokens) - 1) {
|
|
if tokens[i+3] != "," {
|
|
return "", "", y.Error("Unexpect "+str, nil)
|
|
}
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
return key, _map, nil
|
|
}
|
|
//log.Println(str, tokens)
|
|
return "", nil, y.Error("Unexpect "+str, nil)
|
|
}
|
|
|
|
func splitToken(str string) (tokens []interface{}) {
|
|
str = strings.Trim(str, "\r\t\n ")
|
|
if str == "" {
|
|
panic("Impossbile")
|
|
return
|
|
}
|
|
|
|
tokens = []interface{}{}
|
|
lastPos := 0
|
|
for i := 0; i < len(str); i++ {
|
|
switch str[i] {
|
|
case ':':
|
|
fallthrough
|
|
case '{':
|
|
fallthrough
|
|
case '[':
|
|
fallthrough
|
|
case '}':
|
|
fallthrough
|
|
case ']':
|
|
fallthrough
|
|
case ',':
|
|
if i > lastPos {
|
|
tokens = append(tokens, str[lastPos:i])
|
|
}
|
|
tokens = append(tokens, str[i:i+1])
|
|
lastPos = i + 1
|
|
case ' ':
|
|
if i > lastPos {
|
|
tokens = append(tokens, str[lastPos:i])
|
|
}
|
|
lastPos = i + 1
|
|
case '\'':
|
|
//log.Println("Scan End of String")
|
|
i++
|
|
start := i
|
|
for ; i < len(str); i++ {
|
|
if str[i] == '\'' {
|
|
//log.Println("Found End of String", start, i)
|
|
break
|
|
}
|
|
}
|
|
tokens = append(tokens, str[start:i])
|
|
lastPos = i + 1
|
|
case '"':
|
|
i++
|
|
start := i
|
|
for ; i < len(str); i++ {
|
|
if str[i] == '"' {
|
|
break
|
|
}
|
|
}
|
|
tokens = append(tokens, str[start:i])
|
|
lastPos = i + 1
|
|
}
|
|
}
|
|
////log.Println("last", lastPos)
|
|
if lastPos < len(str) {
|
|
tokens = append(tokens, str[lastPos:])
|
|
}
|
|
|
|
if len(tokens) == 1 {
|
|
tokens[0] = string2Val(tokens[0].(string))
|
|
return
|
|
}
|
|
|
|
if tokens[1] == ":" {
|
|
if len(tokens) == 2 {
|
|
return
|
|
}
|
|
if tokens[2] == "{" || tokens[2] == "[" {
|
|
return
|
|
}
|
|
str = strings.Trim(strings.SplitN(str, ":", 2)[1], "\t ")
|
|
if len(str) > 2 {
|
|
if str[0] == '\'' && str[len(str)-1] == '\'' {
|
|
str = str[1 : len(str)-1]
|
|
} else if str[0] == '"' && str[len(str)-1] == '"' {
|
|
str = str[1 : len(str)-1]
|
|
}
|
|
}
|
|
val := string2Val(str)
|
|
tokens = []interface{}{tokens[0], tokens[1], val}
|
|
return
|
|
}
|
|
|
|
if len(str) > 2 {
|
|
if str[0] == '\'' && str[len(str)-1] == '\'' {
|
|
str = str[1 : len(str)-1]
|
|
} else if str[0] == '"' && str[len(str)-1] == '"' {
|
|
str = str[1 : len(str)-1]
|
|
}
|
|
}
|
|
val := string2Val(str)
|
|
tokens = []interface{}{val}
|
|
return
|
|
}
|
|
|
|
func (y *yamlReader) Error(msg string, err error) error {
|
|
if err != nil {
|
|
return errors.New(fmt.Sprintf("line %d : %s : %v", y.lineNum, msg, err.Error()))
|
|
}
|
|
return errors.New(fmt.Sprintf("line %d >> %s", y.lineNum, msg))
|
|
}
|