/* uriescape.c - URI Escape Arguments
   Build: gcc -Wall -o uriescape uriescape.c
*/

#include <stdio.h>
#include <stdlib.h>

void usage(char *prog) { 
   printf("uriescape - URI Escape Arguments\n"); 
   printf("Usage: %s <args>\n", prog); 
   printf("Author: Sean B. Palmer, inamidst.com\n"); 
}

void escape(char *arg) { 
   int i; 
   char c; 

   for (i = 0; (c = arg[i]) != '\0'; i++) { 
      if ((c == 0x2D) || (c == 0x2E) || // Hyphen-Minus, Full Stop
          ((0x30 <= c) && (c <= 0x39)) || // Digits [0-9]
          ((0x41 <= c) && (c <= 0x5A)) || // Uppercase [A-Z]
          ((0x61 <= c) && (c <= 0x7A))) { // Lowercase [a-z]
         putchar(c); 
      } else { printf("%%%02X", c); }
   }
}

int main(int argc, char *argv[]) { 
   int i; 

   if (argc == 1) { 
      usage(argv[0]); 
      exit(0); 
   }

   for (i = 1; argc > 1; argc--) { 
      escape(argv[i]); 
      if (argc > 2) printf("%%20"); 
      i++; 
   }
   printf("\n"); 

   exit(0); 
}

/* EOF */