regexEscapeNul
Escapes the nul characters in @string to "\x00". It can be used to compile a regex with embedded nul characters.
For completeness, @length can be -1 for a nul-terminated string. In this case the output string will be of course equal to @string.
Return
a newly-allocated escaped string
Since
2.30
Parameters
string
the string to escape
length
the length of @string