1 5cdb1798 2005-10-29 devnull /*
 2 5cdb1798 2005-10-29 devnull  *	upas/unesc - interpret =?foo?bar?=char?= escapes
 3 5cdb1798 2005-10-29 devnull  */
 4 5cdb1798 2005-10-29 devnull 
 5 5cdb1798 2005-10-29 devnull #include <stdio.h>
 6 5cdb1798 2005-10-29 devnull #include <stdlib.h>
 7 5cdb1798 2005-10-29 devnull 
 8 5cdb1798 2005-10-29 devnull int
 9 5cdb1798 2005-10-29 devnull hex(int c)
10 5cdb1798 2005-10-29 devnull {
11 5cdb1798 2005-10-29 devnull 	if('0' <= c && c <= '9')
12 5cdb1798 2005-10-29 devnull 		return c - '0';
13 5cdb1798 2005-10-29 devnull 	if('A' <= c && c <= 'F')
14 5cdb1798 2005-10-29 devnull 		return c - 'A' + 10;
15 5cdb1798 2005-10-29 devnull 	if('a' <= c && c <= 'f')
16 5cdb1798 2005-10-29 devnull 		return c - 'a' + 10;
17 5cdb1798 2005-10-29 devnull 	return 0;
18 5cdb1798 2005-10-29 devnull }
19 5cdb1798 2005-10-29 devnull 
20 b5f65921 2006-02-11 devnull int
21 5cdb1798 2005-10-29 devnull main(int argc, char **argv)
22 5cdb1798 2005-10-29 devnull {
23 5cdb1798 2005-10-29 devnull 	int c;
24 5cdb1798 2005-10-29 devnull 
25 5cdb1798 2005-10-29 devnull 	while((c=getchar()) != EOF){
26 5cdb1798 2005-10-29 devnull 		if(c == '='){
27 5cdb1798 2005-10-29 devnull 			if((c=getchar()) == '?'){
28 5cdb1798 2005-10-29 devnull 				while((c=getchar()) != EOF && c != '?')
29 5cdb1798 2005-10-29 devnull 					continue;
30 5cdb1798 2005-10-29 devnull 				while((c=getchar()) != EOF && c != '?')
31 5cdb1798 2005-10-29 devnull 					continue;
32 5cdb1798 2005-10-29 devnull 				while((c=getchar()) != EOF && c != '?'){
33 5cdb1798 2005-10-29 devnull 					if(c == '='){
34 5cdb1798 2005-10-29 devnull 						c = hex(getchar()) << 4;
35 5cdb1798 2005-10-29 devnull 						c |= hex(getchar());
36 5cdb1798 2005-10-29 devnull 					}
37 5cdb1798 2005-10-29 devnull 					putchar(c);
38 5cdb1798 2005-10-29 devnull 				}
39 5cdb1798 2005-10-29 devnull 				(void) getchar();	/* consume '=' */
40 5cdb1798 2005-10-29 devnull 			}else{
41 5cdb1798 2005-10-29 devnull 				putchar('=');
42 5cdb1798 2005-10-29 devnull 				putchar(c);
43 5cdb1798 2005-10-29 devnull 			}
44 5cdb1798 2005-10-29 devnull 		}else
45 5cdb1798 2005-10-29 devnull 			putchar(c);
46 5cdb1798 2005-10-29 devnull 	}
47 5cdb1798 2005-10-29 devnull 	exit(0);
48 5cdb1798 2005-10-29 devnull }