compress.gzip / deflate: rename gzip module into deflate module (#14682)

vlib/compress/README.md

@@ -1,4 +1,4 @@
 ## Description:
 
 `compress` is a namespace for (multiple) compression algorithms supported by V.
-At the moment, only `compress.zlib` and `compress.gzip` are implemented.
+At the moment, only `compress.zlib` and `compress.deflate` are implemented.

vlib/compress/deflate/README.md

@@ -0,0 +1,21 @@
+## Description:
+
+`compress.deflate` is a module that assists in the compression and
+decompression of binary data using `deflate` compression
+
+NOTE: To decompress gzip, discard first 10 bytes of compressed bytes
+then use `compress.deflate.decompress`. (Header validation won't be
+performed in this case)
+
+## Examples:
+
+```v
+import compress.deflate
+
+fn main() {
+	uncompressed := 'Hello world!'
+	compressed := deflate.compress(uncompressed.bytes())?
+	decompressed := deflate.decompress(compressed)?
+	assert decompressed == uncompressed.bytes()
+}
+```

vlib/compress/deflate/deflate.v

@@ -1,4 +1,4 @@
-module gzip
+module deflate
 
 import compress
 

vlib/compress/deflate/deflate_test.v

@@ -1,8 +1,12 @@
-module gzip
+module deflate
+
+const gzip_magic_numbers = [u8(0x1f), 0x8b]
 
 fn test_gzip() ? {
 	uncompressed := 'Hello world!'
 	compressed := compress(uncompressed.bytes())?
+	first2 := compressed[0..2]
+	assert first2 != deflate.gzip_magic_numbers
 	decompressed := decompress(compressed)?
 	assert decompressed == uncompressed.bytes()
 }

vlib/compress/gzip/README.md

@@ -1,17 +0,0 @@
-## Description:
-
-`compress.gzip` is a module that assists in the compression and
-decompression of binary data using `gzip` compression
-
-## Examples:
-
-```v
-import compress.gzip
-
-fn main() {
-	uncompressed := 'Hello world!'
-	compressed := gzip.compress(uncompressed.bytes())?
-	decompressed := gzip.decompress(compressed)?
-	assert decompressed == uncompressed.bytes()
-}
-```