GHC style name Z-encoding and Z-decoding.

Implements GHC's name mangling. This code was taken directly from the GHC source.

Text.Encoding.Z

The Z-encoding

zEncodeString is a name-encoding and decoding function. It encodes any ascii string into a string that is acceptable as a C name. This is code was originally part of GHC and used right before emitting a symbol name into the compiled C or asm code. This library was created as this encoding is useful when working with GHC compiled code or generally when C-compatible name mangling is desired.

zDecodeString is the inverse operation.