Add lzip.

lzip.c

@@ -0,0 +1,71 @@
+/*
+ * This file is part of the Aaru Data Preservation Suite.
+ * Copyright (c) 2019-2021 Natalia Portillo.
+ * Copyright © 2018-2019 David Ryskalczyk
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+
+#include "library.h"
+#include "3rdparty/lzlib-1.12/lzlib.h"
+#include "lzip.h"
+
+AARU_EXPORT int32_t AARU_CALL lzip_decode_buffer(uint8_t*       dst_buffer,
+                                                 int32_t        dst_size,
+                                                 const uint8_t* src_buffer,
+                                                 int32_t        src_size)
+{
+    int           max_in_size;
+    void*         ctx;
+    enum LZ_Errno lz_err;
+    int32_t       in_pos = 0, out_pos = 0, in_size;
+
+    // Initialize the decoder
+    ctx    = LZ_decompress_open();
+    lz_err = LZ_decompress_errno(ctx);
+
+    if(lz_err != LZ_ok)
+    {
+        // Ensure freed
+        LZ_decompress_close(ctx);
+        return 0;
+    }
+
+    // Check maximum lzip buffer input size
+    max_in_size = LZ_decompress_write_size(ctx);
+    if(src_size < max_in_size) max_in_size = src_size;
+
+    // Decompress buffer
+    while(in_pos < src_size && out_pos < dst_size)
+    {
+        if(src_size - in_pos < max_in_size) max_in_size = src_size - in_pos;
+
+        in_size = LZ_decompress_write(ctx, src_buffer + in_pos, max_in_size);
+
+        in_pos += in_size;
+
+        int rd = LZ_decompress_read(ctx, dst_buffer + out_pos, dst_size);
+
+        out_pos += rd;
+
+        if(LZ_decompress_finished(ctx) == 1) break;
+    }
+
+    // Free buffers
+    LZ_decompress_close(ctx);
+
+    return out_pos;
+}