Added thing for windows without build tools

This is a crappy update that I do not want to release, but there are a lot of people without build tools and not everyone wants to install a large utility

Author: danila-schelkov

README.md

@@ -1,6 +1,6 @@
 ### SC Compression
 
-Version 0.4.7
+Version 0.5.1
 -
 
 ### Tools:

examples/compressor/main.py

@@ -16,6 +16,6 @@
 		f.close()
 	with open('out/' + filename, 'wb') as f:
 		f.write(
-			compress(filedata, Signatures.SC, 1)
+			compress(filedata, Signatures.SCLZ, 1)
 		)
 		f.close()

examples/decompressor/test.lzham

@@ -1,14 +1,14 @@
 Metadata-Version: 2.1
 Name: sc-compression
-Version: 0.4.7
+Version: 0.5.1
 Summary: SC Compression
 Home-page: https://github.com/vorono4ka/sc-compression
 Author: Vorono4ka
 Author-email: [email protected]
 License: GPLv3
 Description: ### SC Compression
 
-        Version 0.4.7
+        Version 0.5.1
         -
 
         ### Tools:

sc_compression.egg-info/PKG-INFO

@@ -7,7 +7,11 @@ sc_compression/signatures.py
 sc_compression.egg-info/PKG-INFO
 sc_compression.egg-info/SOURCES.txt
 sc_compression.egg-info/dependency_links.txt
+sc_compression.egg-info/requires.txt
 sc_compression.egg-info/top_level.txt
+sc_compression/support/__init__.py
+sc_compression/support/lzham.exe
+sc_compression/support/lzham.py
 sc_compression/utils/__init__.py
 sc_compression/utils/reader.py
 sc_compression/utils/writer.py

sc_compression.egg-info/SOURCES.txt

@@ -7,7 +7,13 @@
 try:
     import lzham
 except ImportError:
+    from platform import system as get_system_name
+
     lzham = None
+    if get_system_name() == 'Windows':
+        from sc_compression.support.lzham import LZHAM
+
+        lzham = LZHAM
 
 try:
     import zstandard

sc_compression/compressor.py

@@ -6,7 +6,13 @@
 try:
     import lzham
 except ImportError:
+    from platform import system as get_system_name
+
     lzham = None
+    if get_system_name() == 'Windows':
+        from sc_compression.support.lzham import LZHAM
+
+        lzham = LZHAM
 
 try:
     import zstandard
@@ -37,10 +43,10 @@ def decompress(self, buffer: bytes) -> bytes:
             decompressed = self.decompress(buffer)
         elif signature == Signatures.SCLZ:
             self.read(4)
-            if lzham:
-                dict_size_log2 = self.readUByte()
-                uncompressed_size = self.readInt32()
+            dict_size_log2 = self.readUByte()
+            uncompressed_size = self.readInt32()
 
+            if lzham:
                 filters = {
                     'dict_size_log2': dict_size_log2
                 }

sc_compression/decompressor.py

@@ -0,0 +1,52 @@
+from sc_compression.utils.writer import Writer
+from tempfile import mktemp
+from os import remove, system, path
+
+
+class LZHAM:
+    @staticmethod
+    def decompress(data, uncompressed_size, filters):
+        writer = Writer('little')
+        writer.write(b'LZH\x30')
+        writer.writeByte(filters['dict_size_log2'])
+        writer.writeUInt32(uncompressed_size)
+        writer.writeUInt32(0)
+        writer.write(data)
+
+        temp_file_path = mktemp('.lzham')
+        with open(temp_file_path, 'wb') as f:
+            f.write(writer.buffer)
+            f.close()
+
+        if system(f'{path.dirname(__file__)}/lzham.exe '
+                  f'-c -d{filters["dict_size_log2"]} '
+                  f'd {temp_file_path} {temp_file_path} > nul 2>&1'):
+            return None
+        with open(temp_file_path, 'rb') as f:
+            decompressed = f.read()
+            f.close()
+
+        remove(temp_file_path)
+
+        return decompressed
+
+    @staticmethod
+    def compress(data, filters):
+        temp_file_path = mktemp('.data')
+        with open(temp_file_path, 'wb') as f:
+            f.write(data)
+            f.close()
+
+        compressed_path = mktemp('.lzham')
+        if system(f'{path.dirname(__file__)}/lzham.exe '
+                  f'-c -d{filters["dict_size_log2"]} '
+                  f'c {temp_file_path} {compressed_path} > nul 2>&1'):
+            return None
+        with open(compressed_path, 'rb') as f:
+            compressed = f.read()[13:]
+            f.close()
+
+        remove(temp_file_path)
+        remove(compressed_path)
+
+        return compressed