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Task/Variable-length-quantity/LiveCode/variable-length-quantity-2.livecode

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+function VLQtoWholeNum theHexVLQ
+   -- The number must be an integer between zero and 4,294,967,295
+   put baseConvert(theHexVLQ,16,2) into theBits
+   put 0 into bitCounter
+   put empty into the8bitBytes
+   repeat
+      if char 1 of theBits is not empty then
+         put char 1 theBits after the8bitBytes
+         delete char 1 of theBits
+         if theBits is empty then exit repeat
+         add 1 to bitCounter
+         if bitCounter=8 then
+            put "," after the8bitBytes
+            put 0 into bitCounter
+            next repeat
+         end if
+      else
+         exit repeat
+      end if
+   end repeat
+   put the number of items in the8bitBytes into y
+   repeat with x = 1 to y
+      put char 1 of item x of the8bitBytes into lengthCntrlBit
+      delete char 1 of item x of the8bitBytes
+      if the number of chars in item x of the8bitBytes < 7 then
+         repeat 7 - (the number of chars in item x of the8bitBytes)
+            put "0" before item x of the8bitBytes
+         end repeat
+      end if
+      put item x of the8bitBytes after WholeNumInBinary
+      switch lengthCntrlBit
+         case "1"
+            next repeat
+            break
+         case "0"
+            exit repeat
+            break
+      end switch
+   end repeat
+   return baseConvert(WholeNumInBinary,2,10)
+end VLQtoWholeNum
+
+function isHexString theString
+   ---again there is probably an easier way to do this:
+   if char 1 to 2 of theString is "0x" then delete char 1 to 2 of theString
+   put the number of chars in theString into y
+   repeat with x = 1 to y
+      if char x of theString is not in "abcdefABCDEF0123456789" then
+         return false
+      end if
+   end repeat
+end isHexString
+
+on VLQHexToWholeNum
+   Ask "Enter Variable Length Quantity Hex Value:" -- input dialog
+   if it is not empty then
+      if char 1 to 2 of it is "0x" then delete char 1 to 2 of it
+      put it into hexString
+      if isHexString(hexString) is false then
+         answer "Only Valid Hex Digits Are Allowed!"
+         exit VLQHexToWholeNum
+      else
+         put "Original Variable Length Quantity in Hex="& hexString & cr & \
+               "Whole Number=" & VLQtoWholeNum(hexString) into fld "Output"
+      end if
+   end if
+end VLQHexToWholeNum