Data update

Task/CRC-32/Sidef/crc-32.sidef

@@ -0,0 +1,27 @@
+func create_crc32_table {
+    256.of {|k|
+        8.times {
+            if (k & 1) {
+                k >>= 1
+                k ^= 0xedb88320
+            }
+            else {
+                k >>= 1
+            }
+        }
+        k
+    }
+}
+
+func crc32(str, crc = 0) {
+    static crc_table = create_crc32_table()
+    crc &= 0xffffffff
+    crc ^= 0xffffffff
+    str.codes.each {|c|
+        crc = ((crc >> 8) ^ crc_table[(crc & 0xff) ^ c])
+    }
+    return ((crc & 0xffffffff) ^ 0xffffffff)
+}
+
+say crc32("The quick brown fox jumps over the lazy dog").as_hex
+say crc32("over the lazy dog", crc32("The quick brown fox jumps ")).as_hex