Replace usages of CRC32 in std-lib

spec/std/zip/zip_spec.cr

@@ -59,7 +59,7 @@ describe Zip do
     io = IO::Memory.new
 
     text = "contents of foo"
-    crc32 = CRC32.checksum(text)
+    crc32 = Digest::CRC32.checksum(text)
 
     Zip::Writer.open(io) do |zip|
       entry = Zip::Writer::Entry.new("foo.txt")
@@ -98,7 +98,7 @@ describe Zip do
     io = IO::Memory.new
 
     text = "contents of foo"
-    crc32 = CRC32.checksum(text)
+    crc32 = Digest::CRC32.checksum(text)
 
     Zip::Writer.open(io) do |zip|
       entry = Zip::Writer::Entry.new("foo.txt")

src/gzip/gzip.cr

@@ -1,5 +1,5 @@
 require "flate"
-require "crc32"
+require "digest/crc32"
 
 # The Gzip module contains readers and writers of gzip format compressed
 # data, as specified in [RFC 1952](https://www.ietf.org/rfc/rfc1952.txt).

src/gzip/reader.cr

@@ -43,7 +43,7 @@ class Gzip::Reader < IO
   # Creates a new reader from the given *io*.
   def initialize(@io : IO, @sync_close = false)
     # CRC32 of written data
-    @crc32 = CRC32.initial
+    @crc32 = Digest::CRC32.initial
 
     # Total size of the original (uncompressed) input data modulo 2^32.
     @isize = 0_u32
@@ -101,7 +101,7 @@ class Gzip::Reader < IO
         end
 
         # Reset checksum and total size for next entry
-        @crc32 = CRC32.initial
+        @crc32 = Digest::CRC32.initial
         @isize = 0_u32
 
         # Check if another header with data comes
@@ -115,7 +115,7 @@ class Gzip::Reader < IO
         end
       else
         # Update CRC32 and total data size
-        @crc32 = CRC32.update(slice[0, read_bytes], @crc32)
+        @crc32 = Digest::CRC32.update(slice[0, read_bytes], @crc32)
 
         # Using wrapping addition here because isize is only 32 bits wide but
         # uncompressed data size can be bigger.

src/gzip/writer.cr

@@ -37,7 +37,7 @@ class Gzip::Writer < IO
   # Creates a new writer to the given *io*.
   def initialize(@io : IO, @level = Gzip::DEFAULT_COMPRESSION, @sync_close = false)
     # CRC32 of written data
-    @crc32 = CRC32.initial
+    @crc32 = Digest::CRC32.initial
 
     # Total size of the original (uncompressed) input data modulo 2^32.
     @isize = 0
@@ -77,7 +77,7 @@ class Gzip::Writer < IO
     flate_io.write(slice)
 
     # Update CRC32 and total data size
-    @crc32 = CRC32.update(slice, @crc32)
+    @crc32 = Digest::CRC32.update(slice, @crc32)
 
     # Using wrapping addition here because isize is only 32 bits wide but
     # uncompressed data size can be bigger.

src/zip/checksum_reader.cr

@@ -3,7 +3,7 @@ module Zip
   # optionally verifying the computed value against an
   # expected one.
   private class ChecksumReader < IO
-    getter crc32 = CRC32.initial
+    getter crc32 = Digest::CRC32.initial
 
     def initialize(@io : IO, @filename : String, verify @expected_crc32 : UInt32? = nil)
     end
@@ -15,7 +15,7 @@ module Zip
           raise Zip::Error.new("Checksum failed for entry #{@filename} (expected #{expected_crc32}, got #{crc32}")
         end
       else
-        @crc32 = CRC32.update(slice[0, read_bytes], @crc32)
+        @crc32 = Digest::CRC32.update(slice[0, read_bytes], @crc32)
       end
       read_bytes
     end

src/zip/checksum_writer.cr

@@ -3,7 +3,7 @@ module Zip
   # checksum while writing to an underlying IO.
   private class ChecksumWriter < IO
     getter count = 0_u32
-    getter crc32 = CRC32.initial
+    getter crc32 = Digest::CRC32.initial
     getter! io : IO
 
     def initialize(@compute_crc32 = false)
@@ -17,13 +17,13 @@ module Zip
       return if slice.empty?
 
       @count += slice.size
-      @crc32 = CRC32.update(slice, @crc32) if @compute_crc32
+      @crc32 = Digest::CRC32.update(slice, @crc32) if @compute_crc32
       io.write(slice)
     end
 
     def io=(@io)
       @count = 0_u32
-      @crc32 = CRC32.initial
+      @crc32 = Digest::CRC32.initial
     end
   end
 end

src/zip/zip.cr

@@ -1,5 +1,5 @@
 require "flate"
-require "crc32"
+require "digest/crc32"
 require "./*"
 
 # The Zip module contains readers and writers of the zip