werc-1.5.0-tweaks

Tweaks for the werc website builder created by the mad architect Uriel
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urldecode.awk (1010B)

      1 #!/bin/awk -f
      2 BEGIN {
      3 	hextab ["0"] = 0; hextab ["8"] = 8;
      4 	hextab ["1"] = 1; hextab ["9"] = 9;
      5 	hextab ["2"] = 2; hextab ["A"] = hextab ["a"] = 10
      6 	hextab ["3"] = 3; hextab ["B"] = hextab ["b"] = 11;
      7 	hextab ["4"] = 4; hextab ["C"] = hextab ["c"] = 12;
      8 	hextab ["5"] = 5; hextab ["D"] = hextab ["d"] = 13;
      9 	hextab ["6"] = 6; hextab ["E"] = hextab ["e"] = 14;
     10 	hextab ["7"] = 7; hextab ["F"] = hextab ["f"] = 15;
     11 }
     12 {
     13 	decoded = ""
     14 	i   = 1
     15 	len = length ($0)
     16 	while ( i <= len ) {
     17 		c = substr ($0, i, 1)
     18 		if ( c == "%" ) {
     19 			if ( i+2 <= len ) {
     20 				c1 = substr ($0, i+1, 1)
     21 				c2 = substr ($0, i+2, 1)
     22 				if ( hextab [c1] == "" || hextab [c2] == "" ) {
     23 					print "WARNING: invalid hex encoding: %" c1 c2 | "cat >&2"
     24 				} else {
     25 					code = 0 + hextab [c1] * 16 + hextab [c2] + 0
     26 					c = sprintf ("%c", code)
     27 					i = i + 2
     28 				}
     29 			} else {
     30 				print "WARNING: invalid % encoding: " substr ($0, i, len - i)
     31 			}
     32 		} else if ( c == "+" ) {
     33 			c = " "
     34 		}
     35 		decoded = decoded c
     36 		++i
     37 	}
     38 	print decoded
     39 }