Source:NetHack 3.0.0/lev main.c

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1.    /*	SCCS Id: @(#)lev_main.c	3.0	89/07/02
2.    /*	Copyright (c) 1989 by Jean-Christophe Collet */
3.    /* NetHack may be freely redistributed.  See license for details. */
4.    
5.    /*
6.     * This file contains the main function for the parser
7.     * and some useful functions needed by yacc
8.     */
9.    
10.   #include <stdio.h>
11.   
12.   #define MAX_ERRORS	25
13.   
14.   extern int line_number;
15.   char *fname = "(stdin)";
16.   int fatal_error = 0;
17.   
18.   main(argc, argv) 
19.   int argc;
20.   char **argv;
21.   {
22.   	FILE *fin;
23.   	int i;
24.   
25.   	if (argc == 1)		/* Read standard input */
26.   	    yyparse();
27.   	else 			/* Otherwise every argument is a filename */
28.   	    for(i=1; i<argc; i++) {
29.   		    fin = freopen(argv[i], "r", stdin);
30.   		    fname = argv[i];
31.   		    if (!fin) 
32.   			fprintf(stderr,"Can't open %s\n", argv[i]);
33.   		    else
34.   			yyparse();
35.   		    line_number = 1;
36.   		    fatal_error = 0;
37.   	    }
38.   	return 0;
39.   }
40.   
41.   /* 
42.    * Each time the parser detects an error, it uses this function.
43.    * Here we take count of the errors. To continue farther than
44.    * MAX_ERRORS wouldn't be reasonable.
45.    */
46.   
47.   yyerror(s)
48.   char *s;
49.   {
50.   	fprintf(stderr,"%s : line %d : %s\n",fname,line_number, s);
51.   	if (++fatal_error > MAX_ERRORS) {
52.   		fprintf(stderr,"Too many errors, good bye!\n");
53.   		exit(1);
54.   	}
55.   }
56.   
57.   /* 
58.    * Just display a warning (that is : a non fatal error)
59.    */
60.   
61.   yywarning(s)
62.   char *s;
63.   {
64.   	fprintf(stderr,"%s : line %d : WARNING : %s\n",fname,line_number,s);
65.   }
66.   
67.   yywrap()
68.   {
69.          return 1;
70.   }