LibCompress: Add LibCompress

For now this only contains DEFLATE, and a very simple Zlib
Eventually GZip, etc. can go here as well.

1 files changed, 103 insertions, 0 deletions

diff --git a/Userland/test-compress.cpp b/Userland/test-compress.cpp
new file mode 100644
index 0000000000..5dfe1439fe
--- /dev/null
+++ b/Userland/test-compress.cpp
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibCompress/Deflate.h>
+#include <LibCompress/Zlib.h>
+#include <LibCore/ArgsParser.h>
+
+auto main(int argc, char** argv) -> int
+{
+    const char* mode = nullptr;
+    const char* type = nullptr;
+
+    Core::ArgsParser parser;
+    parser.add_positional_argument(type, "Type of algorithm to apply (Only Zlib and DEFLATE is present at the moment)", "type", Core::ArgsParser::Required::No);
+    parser.add_positional_argument(mode, "Mode to operate in (compress|decompress; Only decompress is valid at the moment)", "mode", Core::ArgsParser::Required::No);
+    parser.parse(argc, argv);
+
+    if (type == nullptr) {
+        type = "deflate";
+    }
+
+    if (mode == nullptr) {
+        mode = "decompress";
+    }
+
+    StringView mode_sv { mode };
+    StringView type_sv { type };
+    if (mode_sv == "decompress") {
+        if (type_sv == "deflate") {
+            // Deflated bytes for the string "This is a simple text file :)"
+            u8 data_bytes[] = {
+                0x0B, 0xC9, 0xC8, 0x2C,
+                0x56, 0x00, 0xA2, 0x44,
+                0x85, 0xE2, 0xCC, 0xDC,
+                0x82, 0x9C, 0x54, 0x85,
+                0x92, 0xD4, 0x8A, 0x12,
+                0x85, 0xB4, 0x4C, 0x20,
+                0xCB, 0x4A, 0x13, 0x00
+            };
+
+            auto deflater = Compress::Deflate({ data_bytes, 4 * 7 });
+            auto deflated = deflater.decompress();
+            auto decompressed = String((const char*)deflated.data(), deflated.size());
+
+            if (decompressed.equals_ignoring_case("This is a simple text file :)")) {
+                printf("Test PASSED");
+                return 0;
+            } else {
+                printf("Test FAILED");
+                return 1;
+            }
+        }
+
+        if (type_sv == "zlib") {
+            // zlib bytes for the string "This is a simple text file :)"
+            u8 data_bytes[] = {
+                0x78, 0x01, 0x01, 0x1D, 0x00, 0xE2, 0xFF, 0x54,
+                0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x61,
+                0x20, 0x73, 0x69, 0x6D, 0x70, 0x6C, 0x65, 0x20,
+                0x74, 0x65, 0x78, 0x74, 0x20, 0x66, 0x69, 0x6C, 
+                0x65, 0x20, 0x3A, 0x29, 0x99, 0x5E, 0x09, 0xE8
+            };
+
+            auto deflater = Compress::Zlib({ data_bytes, 8 * 5 });
+            auto deflated = deflater.decompress();
+            auto decompressed = String((const char*)deflated.data(), deflated.size());
+
+            if (decompressed.equals_ignoring_case("This is a simple text file :)")) {
+                printf("Test PASSED");
+                return 0;
+            } else {
+                printf("Test FAILED");
+                return 1;
+            }
+        }
+    }
+
+    printf("Unknown arguments passed to test!");
+    return 1;
+}