LibCompress: Rename `Compress::Zlib` to `Compress::ZlibDecompressor`

Because that's what it is, even if it mainly relies on
`DeflateDecompressor` to do the heavy lifting.

Tests/LibCompress/TestZlib.cpp

@@ -20,7 +20,7 @@ TEST_CASE(zlib_decompress_simple)
 
     const u8 uncompressed[] = "This is a simple text file :)";
 
-    auto const decompressed = Compress::Zlib::decompress_all(compressed);
+    auto const decompressed = Compress::ZlibDecompressor::decompress_all(compressed);
     EXPECT(decompressed.value().bytes() == (ReadonlyBytes { uncompressed, sizeof(uncompressed) - 1 }));
 }
 

Userland/Libraries/LibCompress/Zlib.cpp

@@ -15,7 +15,7 @@ namespace Compress {
 
 constexpr static size_t Adler32Size = sizeof(u32);
 
-Optional<Zlib> Zlib::try_create(ReadonlyBytes data)
+Optional<ZlibDecompressor> ZlibDecompressor::try_create(ReadonlyBytes data)
 {
     if (data.size() < (sizeof(ZlibHeader) + Adler32Size))
         return {};
@@ -31,18 +31,18 @@ Optional<Zlib> Zlib::try_create(ReadonlyBytes data)
     if (header.as_u16 % 31 != 0)
         return {}; // error correction code doesn't match
 
-    Zlib zlib { header, data };
+    ZlibDecompressor zlib { header, data };
     zlib.m_data_bytes = data.slice(2, data.size() - sizeof(ZlibHeader) - Adler32Size);
     return zlib;
 }
 
-Zlib::Zlib(ZlibHeader header, ReadonlyBytes data)
+ZlibDecompressor::ZlibDecompressor(ZlibHeader header, ReadonlyBytes data)
     : m_header(header)
     , m_input_data(data)
 {
 }
 
-Optional<ByteBuffer> Zlib::decompress()
+Optional<ByteBuffer> ZlibDecompressor::decompress()
 {
     auto buffer_or_error = DeflateDecompressor::decompress_all(m_data_bytes);
     if (buffer_or_error.is_error())
@@ -50,7 +50,7 @@ Optional<ByteBuffer> Zlib::decompress()
     return buffer_or_error.release_value();
 }
 
-Optional<ByteBuffer> Zlib::decompress_all(ReadonlyBytes bytes)
+Optional<ByteBuffer> ZlibDecompressor::decompress_all(ReadonlyBytes bytes)
 {
     auto zlib = try_create(bytes);
     if (!zlib.has_value())
@@ -58,7 +58,7 @@ Optional<ByteBuffer> Zlib::decompress_all(ReadonlyBytes bytes)
     return zlib->decompress();
 }
 
-u32 Zlib::checksum()
+u32 ZlibDecompressor::checksum()
 {
     if (!m_checksum) {
         auto bytes = m_input_data.slice_from_end(Adler32Size);

Userland/Libraries/LibCompress/Zlib.h

@@ -42,16 +42,16 @@ struct ZlibHeader {
 };
 static_assert(sizeof(ZlibHeader) == sizeof(u16));
 
-class Zlib {
+class ZlibDecompressor {
 public:
     Optional<ByteBuffer> decompress();
     u32 checksum();
 
-    static Optional<Zlib> try_create(ReadonlyBytes data);
+    static Optional<ZlibDecompressor> try_create(ReadonlyBytes data);
     static Optional<ByteBuffer> decompress_all(ReadonlyBytes);
 
 private:
-    Zlib(ZlibHeader, ReadonlyBytes data);
+    ZlibDecompressor(ZlibHeader, ReadonlyBytes data);
 
     ZlibHeader m_header;
 

Userland/Libraries/LibGfx/Font/WOFF/Font.cpp

@@ -120,7 +120,7 @@ ErrorOr<NonnullRefPtr<Font>> Font::try_load_from_externally_owned_memory(Readonl
         if (font_buffer_offset + orig_length > font_buffer.size())
             return Error::from_string_literal("Uncompressed WOFF table too big");
         if (comp_length < orig_length) {
-            auto decompressed = Compress::Zlib::decompress_all(buffer.slice(offset, comp_length));
+            auto decompressed = Compress::ZlibDecompressor::decompress_all(buffer.slice(offset, comp_length));
             if (!decompressed.has_value())
                 return Error::from_string_literal("Could not decompress WOFF table");
             if (orig_length != decompressed->size())

Userland/Libraries/LibGfx/PNGLoader.cpp

@@ -706,7 +706,7 @@ static ErrorOr<void> decode_png_bitmap(PNGLoadingContext& context)
     if (context.color_type == PNG::ColorType::IndexedColor && context.palette_data.is_empty())
         return Error::from_string_literal("PNGImageDecoderPlugin: Didn't see a PLTE chunk for a palletized image, or it was empty.");
 
-    auto result = Compress::Zlib::decompress_all(context.compressed_data.span());
+    auto result = Compress::ZlibDecompressor::decompress_all(context.compressed_data.span());
     if (!result.has_value()) {
         context.state = PNGLoadingContext::State::Error;
         return Error::from_string_literal("PNGImageDecoderPlugin: Decompression failed");

Userland/Libraries/LibHTTP/Job.cpp

@@ -51,12 +51,12 @@ static ErrorOr<ByteBuffer> handle_content_encoding(ByteBuffer const& buf, Deprec
 
         // Even though the content encoding is "deflate", it's actually deflate with the zlib wrapper.
         // https://tools.ietf.org/html/rfc7230#section-4.2.2
-        auto uncompressed = Compress::Zlib::decompress_all(buf);
+        auto uncompressed = Compress::ZlibDecompressor::decompress_all(buf);
         if (!uncompressed.has_value()) {
             // From the RFC:
             // "Note: Some non-conformant implementations send the "deflate"
             //        compressed data without the zlib wrapper."
-            dbgln_if(JOB_DEBUG, "Job::handle_content_encoding: Zlib::decompress_all() failed. Trying DeflateDecompressor::decompress_all()");
+            dbgln_if(JOB_DEBUG, "Job::handle_content_encoding: ZlibDecompressor::decompress_all() failed. Trying DeflateDecompressor::decompress_all()");
             uncompressed = TRY(Compress::DeflateDecompressor::decompress_all(buf));
         }