11a6fce027
* vendor bencode library github.com/zeebo/bencode * add metainfo parsing library from XD * fix up upload handler so to be less cluttered
76 lignes
1,8 Kio
Go
76 lignes
1,8 Kio
Go
package bencode
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import (
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"reflect"
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"strings"
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"unicode"
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)
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// tagOptions is the string following a comma in a struct field's "bencode"
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// tag, or the empty string. It does not include the leading comma.
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type tagOptions string
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// parseTag splits a struct field's tag into its name and
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// comma-separated options.
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func parseTag(tag string) (string, tagOptions) {
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if idx := strings.Index(tag, ","); idx != -1 {
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return tag[:idx], tagOptions(tag[idx+1:])
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}
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return tag, tagOptions("")
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}
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// Contains returns whether checks that a comma-separated list of options
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// contains a particular substr flag. substr must be surrounded by a
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// string boundary or commas.
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func (options tagOptions) Contains(optionName string) bool {
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s := string(options)
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for s != "" {
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var next string
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i := strings.Index(s, ",")
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if i >= 0 {
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s, next = s[:i], s[i+1:]
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}
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if s == optionName {
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return true
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}
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s = next
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}
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return false
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}
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func isValidTag(key string) bool {
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if key == "" {
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return false
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}
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for _, c := range key {
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if c != ' ' && c != '$' && c != '-' && c != '_' && c != '.' && !unicode.IsLetter(c) && !unicode.IsDigit(c) {
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return false
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}
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}
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return true
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}
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func matchName(key string) func(string) bool {
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return func(s string) bool {
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return strings.ToLower(key) == strings.ToLower(s)
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}
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}
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func isEmptyValue(v reflect.Value) bool {
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switch v.Kind() {
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case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
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return v.Len() == 0
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case reflect.Bool:
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return !v.Bool()
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return v.Int() == 0
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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return v.Uint() == 0
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case reflect.Float32, reflect.Float64:
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return v.Float() == 0
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case reflect.Interface, reflect.Ptr:
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return v.IsNil()
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}
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return false
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}
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