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|
package flags
import (
"strconv"
)
type multiTag struct {
value string
cache map[string][]string
}
func newMultiTag(v string) multiTag {
return multiTag{
value: v,
}
}
func (x *multiTag) scan() map[string][]string {
v := x.value
ret := make(map[string][]string)
// This is mostly copied from reflect.StructTAg.Get
for v != "" {
i := 0
// Skip whitespace
for i < len(v) && v[i] == ' ' {
i++
}
v = v[i:]
if v == "" {
break
}
// Scan to colon to find key
i = 0
for i < len(v) && v[i] != ' ' && v[i] != ':' && v[i] != '"' {
i++
}
if i+1 >= len(v) || v[i] != ':' || v[i+1] != '"' {
break
}
name := v[:i]
v = v[i+1:]
// Scan quoted string to find value
i = 1
for i < len(v) && v[i] != '"' {
if v[i] == '\\' {
i++
}
i++
}
if i >= len(v) {
break
}
val, _ := strconv.Unquote(v[:i+1])
v = v[i+1:]
ret[name] = append(ret[name], val)
}
return ret
}
func (x *multiTag) cached() map[string][]string {
if x.cache == nil {
x.cache = x.scan()
}
return x.cache
}
func (x *multiTag) Get(key string) string {
c := x.cached()
if v, ok := c[key]; ok {
return v[len(v)-1]
}
return ""
}
func (x *multiTag) GetMany(key string) []string {
c := x.cached()
return c[key]
}
|
