pirutil.c - various utility functions
- clone a string.
Copy the characters of src into dest and return dest.
Memory allocation is done by this function,
keeping this function's client code simple.
Please free() the memory after usage!
- open_file(char *filename,
- Open the file
filename in mode
If this fails,
an error message is printed,
and the program is terminated.
- Prints the specified message if the verbose flag was set
- Prints the specified message if the debug flag was set.
- Return 1 if the specified id is a Parrot op,