Data update

Task/CRC-32/Jq/crc-32-1.jq

@@ -0,0 +1,2 @@
+def div($j):
+  ((. - (. % $j)) / $j) | round;

Task/CRC-32/Jq/crc-32-2.jq

@@ -0,0 +1,34 @@
+include "bitwise" {search: "."};  # see above
+
+# non-negative decimal integer to hex string
+def hex:
+  def stream:
+    recurse(if . >= 16 then ./16|floor else empty end) | . % 16 ;
+  [stream] | reverse
+  |  map(if . < 10 then 48 + . else . + 87 end) | implode ;
+
+### CRC-32
+
+def crc32Table:
+  reduce range(0; 256) as $i ([];
+    . + [reduce range(0; 8) as $j ($i;
+              if bitwise_and(.;1) == 1
+              then bitwise_xor(rightshift(1); 3988292384) # 0xedb88320
+              else rightshift( 1 )
+              end) ] );
+
+# Input: an ASCII string
+# Output: its CRC-32
+def crc32:
+  explode as $s
+  | crc32Table as $table
+  | reduce range(0; $s|length) as $i (4294967295 ; # ~0
+      # 0xff is 255
+      bitwise_and(.; 255 ) as $crb
+      | bitwise_xor( $table[bitwise_xor($crb; $s[$i])] ; rightshift(8)) )
+  | flip(32) ;
+
+def task:
+  crc32 | hex;
+
+"The quick brown fox jumps over the lazy dog" | task