diff options
Diffstat (limited to 'libgo/go/mime/grammar.go')
| -rw-r--r-- | libgo/go/mime/grammar.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libgo/go/mime/grammar.go b/libgo/go/mime/grammar.go index 6e319ff8be8..70a94cd807f 100644 --- a/libgo/go/mime/grammar.go +++ b/libgo/go/mime/grammar.go @@ -22,6 +22,15 @@ func IsTokenChar(rune int) bool { return rune > 0x20 && rune < 0x7f && !isTSpecial(rune) } +// IsToken returns true if s is a 'token' as as defined by RFC 1521 +// and RFC 2045. +func IsToken(s string) bool { + if s == "" { + return false + } + return strings.IndexFunc(s, isNotTokenChar) < 0 +} + // IsQText returns true if rune is in 'qtext' as defined by RFC 822. func IsQText(rune int) bool { // CHAR = <any ASCII character> ; ( 0-177, 0.-127.) |