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author | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
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committer | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
commit | 5ff4c17907d5b19510a62e08fd8d3b11e62b431d (patch) | |
tree | c0650497e988f47be9c6f2324fa692a52dea82e1 /src/pkg/mime/grammar.go | |
parent | 80f18fc933cf3f3e829c5455a1023d69f7b86e52 (diff) | |
download | golang-upstream/60.tar.gz |
Imported Upstream version 60upstream/60
Diffstat (limited to 'src/pkg/mime/grammar.go')
-rw-r--r-- | src/pkg/mime/grammar.go | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/pkg/mime/grammar.go b/src/pkg/mime/grammar.go new file mode 100644 index 000000000..6e319ff8b --- /dev/null +++ b/src/pkg/mime/grammar.go @@ -0,0 +1,36 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package mime + +import ( + "strings" +) + +// isTSpecial returns true if rune is in 'tspecials' as defined by RFC +// 1521 and RFC 2045. +func isTSpecial(rune int) bool { + return strings.IndexRune(`()<>@,;:\"/[]?=`, rune) != -1 +} + +// IsTokenChar returns true if rune is in 'token' as defined by RFC +// 1521 and RFC 2045. +func IsTokenChar(rune int) bool { + // token := 1*<any (US-ASCII) CHAR except SPACE, CTLs, + // or tspecials> + return rune > 0x20 && rune < 0x7f && !isTSpecial(rune) +} + +// 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.) + // qtext = <any CHAR excepting <">, ; => may be folded + // "\" & CR, and including + // linear-white-space> + switch rune { + case '"', '\\', '\r': + return false + } + return rune < 0x80 +} |