hanayo/vendor/github.com/thehowl/conf/parse.go

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2019-02-23 13:29:15 +00:00
package conf
// FieldValue is a field=value pair in the configuration.
type FieldValue struct {
Field string
Value string
}
const (
currentName = iota
currentValue
currentComment
)
// Parse converts some bytes into various FieldValue pairs.
func Parse(data []byte) []FieldValue {
fvs := []FieldValue{}
var (
fieldName string
fieldValue string
nextNormal bool
current byte
)
for _, c := range data {
if current == currentComment && c != '\n' {
continue
}
if nextNormal {
switch current {
case currentName:
fieldName += string(c)
case currentValue:
fieldValue += string(c)
}
nextNormal = false
continue
}
switch c {
case '=':
switch current {
// if we are still at the name, let's switch to a value.
case currentName:
current = currentValue
// if we are already at the value, treat the = character like any other sign
case currentValue:
fieldValue += string(c)
}
case ';':
current = currentComment
case '\n':
if fieldName != "" && fieldValue != "" {
fvs = append(fvs, FieldValue{
Field: fieldName,
Value: removeTrailingCR(fieldValue),
})
}
fieldName = ""
fieldValue = ""
current = currentName
case '\\':
nextNormal = true
default:
switch current {
case currentName:
fieldName += string(c)
case currentValue:
fieldValue += string(c)
}
nextNormal = false
}
}
if fieldName != "" && fieldValue != "" {
fvs = append(fvs, FieldValue{
Field: fieldName,
Value: removeTrailingCR(fieldValue),
})
}
return fvs
}
func removeTrailingCR(s string) string {
if len(s) == 0 {
return s
}
if s[len(s)-1] == '\r' {
return s[:len(s)-1]
}
return s
}