diff options
Diffstat (limited to 'cpe/avstring.go')
-rw-r--r-- | cpe/avstring.go | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/cpe/avstring.go b/cpe/avstring.go new file mode 100644 index 0000000..46e16cf --- /dev/null +++ b/cpe/avstring.go @@ -0,0 +1,54 @@ +package cpe + +//go:generate stringer -linecomment -type=AvStringType + +import ( + "fmt" +) + +// type of avstring. +type AvStringType byte + +const ( + AnyString AvStringType = iota // any + NaString // na + ValString // val +) + +// String value (NISTIR 7695, CPE 2.3 spec, Figure 6-3) +type AvString struct { + Type AvStringType // value type + Val string // value +} + +// token type to avstring type map +var avTypes = map[tokenType]AvStringType { + anyToken: AnyString, + naToken: NaString, + valToken: ValString, +} + +// create new AvString from token. +func newAvString(t token) (AvString, error) { + if at, ok := avTypes[t.Type]; ok { + return AvString { at, t.Val }, nil + } else { + err := fmt.Errorf("invalid token type: 0x%02x", byte(t.Type)) + return AvString { 0, "" }, err + } +} + +// Serialize as string. +func (s AvString) String() string { + switch s.Type { + case AnyString: + return "*" + case NaString: + return "-" + case ValString: + return s.Val + default: + // not sure what to return here + return "" + } +} |