51 lines
997 B
Go
51 lines
997 B
Go
package irc
|
|
|
|
import (
|
|
"bytes"
|
|
"regexp"
|
|
)
|
|
|
|
var maskTranslations = map[byte]string{
|
|
'?': ".",
|
|
'*': ".*",
|
|
}
|
|
|
|
// MaskToRegex converts an irc mask to a go Regexp for more convenient
|
|
// use. This should never return an error, but we have this here just
|
|
// in case.
|
|
func MaskToRegex(rawMask string) (*regexp.Regexp, error) {
|
|
input := bytes.NewBufferString(rawMask)
|
|
|
|
output := &bytes.Buffer{}
|
|
output.WriteByte('^')
|
|
|
|
for {
|
|
c, err := input.ReadByte()
|
|
if err != nil {
|
|
break
|
|
}
|
|
|
|
if c == '\\' {
|
|
c, err = input.ReadByte()
|
|
if err != nil {
|
|
output.WriteString(regexp.QuoteMeta("\\"))
|
|
break
|
|
}
|
|
|
|
if c == '?' || c == '*' || c == '\\' {
|
|
output.WriteString(regexp.QuoteMeta(string(c)))
|
|
} else {
|
|
output.WriteString(regexp.QuoteMeta("\\" + string(c)))
|
|
}
|
|
} else if trans, ok := maskTranslations[c]; ok {
|
|
output.WriteString(trans)
|
|
} else {
|
|
output.WriteString(regexp.QuoteMeta(string(c)))
|
|
}
|
|
}
|
|
|
|
output.WriteByte('$')
|
|
|
|
return regexp.Compile(output.String())
|
|
}
|