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-rw-r--r--vendor/golang.org/x/text/secure/precis/class.go36
1 files changed, 36 insertions, 0 deletions
diff --git a/vendor/golang.org/x/text/secure/precis/class.go b/vendor/golang.org/x/text/secure/precis/class.go
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+// Copyright 2015 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 precis
+
+import (
+ "unicode/utf8"
+)
+
+// TODO: Add contextual character rules from Appendix A of RFC5892.
+
+// A class is a set of characters that match certain derived properties. The
+// PRECIS framework defines two classes: The Freeform class and the Identifier
+// class. The freeform class should be used for profiles where expressiveness is
+// prioritized over safety such as nicknames or passwords. The identifier class
+// should be used for profiles where safety is the first priority such as
+// addressable network labels and usernames.
+type class struct {
+ validFrom property
+}
+
+// Contains satisfies the runes.Set interface and returns whether the given rune
+// is a member of the class.
+func (c class) Contains(r rune) bool {
+ b := make([]byte, 4)
+ n := utf8.EncodeRune(b, r)
+
+ trieval, _ := dpTrie.lookup(b[:n])
+ return c.validFrom <= property(trieval)
+}
+
+var (
+ identifier = &class{validFrom: pValid}
+ freeform = &class{validFrom: idDisOrFreePVal}
+)