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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/mime/grammar.go | |
parent | Initial commit. (diff) | |
download | golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/mime/grammar.go')
-rw-r--r-- | src/mime/grammar.go | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/mime/grammar.go b/src/mime/grammar.go new file mode 100644 index 0000000..6a6f71d --- /dev/null +++ b/src/mime/grammar.go @@ -0,0 +1,32 @@ +// 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 reports whether rune is in 'tspecials' as defined by RFC +// 1521 and RFC 2045. +func isTSpecial(r rune) bool { + return strings.ContainsRune(`()<>@,;:\"/[]?=`, r) +} + +// isTokenChar reports whether rune is in 'token' as defined by RFC +// 1521 and RFC 2045. +func isTokenChar(r rune) bool { + // token := 1*<any (US-ASCII) CHAR except SPACE, CTLs, + // or tspecials> + return r > 0x20 && r < 0x7f && !isTSpecial(r) +} + +// isToken reports whether s is a 'token' as defined by RFC 1521 +// and RFC 2045. +func isToken(s string) bool { + if s == "" { + return false + } + return strings.IndexFunc(s, isNotTokenChar) < 0 +} |