Initial project import

tools/v/vlib/compress/lz/lz.v

@@ -0,0 +1,57 @@
+module lz
+
+// Format identifies which LZ-family codec variant to use.
+pub enum Format {
+	lz77
+	lz78
+	lzw
+	lz4
+	lzss
+	lzma
+	lzma2
+	lzjb
+}
+
+// format_from_string parses a case-insensitive format name.
+pub fn format_from_string(name string) !Format {
+	key := name.to_lower()
+	return match key {
+		'lz77' { .lz77 }
+		'lz78' { .lz78 }
+		'lzw' { .lzw }
+		'lz4' { .lz4 }
+		'lzss' { .lzss }
+		'lzma' { .lzma }
+		'lzma2' { .lzma2 }
+		'lzjb' { .lzjb }
+		else { return error('unknown lz format: ${name}') }
+	}
+}
+
+// compress compresses data with the selected LZ format.
+pub fn compress(data []u8, format Format) ![]u8 {
+	return match format {
+		.lz77 { compress_lz77(data) }
+		.lz78 { compress_lz78(data) }
+		.lzw { compress_lzw(data) }
+		.lz4 { compress_lz4(data) }
+		.lzss { compress_lzss(data) }
+		.lzma { compress_lzma(data) }
+		.lzma2 { compress_lzma2(data) }
+		.lzjb { compress_lzjb(data) }
+	}
+}
+
+// decompress decompresses data with the selected LZ format.
+pub fn decompress(data []u8, format Format) ![]u8 {
+	return match format {
+		.lz77 { decompress_lz77(data) }
+		.lz78 { decompress_lz78(data) }
+		.lzw { decompress_lzw(data) }
+		.lz4 { decompress_lz4(data) }
+		.lzss { decompress_lzss(data) }
+		.lzma { decompress_lzma(data) }
+		.lzma2 { decompress_lzma2(data) }
+		.lzjb { decompress_lzjb(data) }
+	}
+}