_CP_match is equivalent to the result = string1 match string2 BASIC statement.
int _CP_match(int* result, CPSTR* string1, CPSTR* string2)
This function returns -1 if an error occurs. The error code is contained in _CP_errno.
/* Prints "1". */
CPSTR * s = _CP_mkstr("a1c");
CPSTR * t = _CP_mkstr("1a1n1a");
int i;
_CP_match(&i,s,t);
_CP_unix_env();
printf("%d\n", i);