3 \details The driver assumes the existence of a bison-generated parser,
4 referenced by the external function 'yyparse'.
5 It also assumes the existence of a lexer which must be initialized
6 before parsing, referenced by the external function 'lexer_init'
7 which assumes standard error handling.
8 All input arguments are made available through the exposed (that is,
9 non-static) array of character pointers 'cargs', which point
10 to the non-duplicated strings in 'argv' directly from the system.
11 \author Jordan Lavatai
13 ----------------------------------------------------------------------------*/
15 #include <stdio.h> //print
16 #include <errno.h> //errors
17 #include <string.h> //strnlen
19 #include <stdlib.h> //exit
20 #include <unistd.h> //getopt
22 int main(int, char*[]);
24 const char* cargs
['Z'] = {0};
31 /* Main entry from terminal
32 parses the command line and kicks off recursive scanning
40 #define MAXERR "-%c allows at most " S(MAXSTR) " input characters", opt
41 #define USAGE "Usage: %s [-r root]\n", argv[0]
46 switch (opt
= getopt(argc
, argv
, "r:o:"))
51 if (strnlen(optarg
, MAXSTR
) != MAXSTR
)
52 { cargs
[opt
] = optarg
;
55 fprintf(stderr
, MAXERR
);
57 fprintf(stderr
, USAGE
);