tools/add-cfi.common.awk

   1 function hex2int(str,   i) {
   2   str = tolower(str)
   3
   4   for (i = 1; i <= 16; i++) {
   5     char = substr("0123456789abcdef", i, 1)
   6     lookup[char] = i-1
   7   }
   8
   9   result = 0
  10   for (i = 1; i <= length(str); i++) {
  11     result = result * 16
  12     char   = substr(str, i, 1)
  13     result = result + lookup[char]
  14   }
  15   return result
  16 }
  17
  18 function parse_const(str) {
  19   sign = sub(/^-/, "", str)
  20   hex  = sub(/^0x/, "", str)
  21   if (hex)
  22     n = hex2int(str)
  23   else
  24     n = str+0
  25   return sign ? -n : n
  26 }