- for (size_t i = 0; i < ARRAY_LEN(compressor_default_params); i++) {
- FREE(compressor_default_params[i]);
- compressor_default_params[i] = NULL;
+ bool destructive;
+ const struct compressor_ops *ops;
+ u64 size;
+
+ destructive = (compression_level & WIMLIB_COMPRESSOR_FLAG_DESTRUCTIVE);
+ compression_level &= ~WIMLIB_COMPRESSOR_FLAG_DESTRUCTIVE;
+
+ if (!compressor_ctype_valid(ctype))
+ return 0;
+
+ if (compression_level > 0xFFFFFF)
+ return 0;
+
+ if (max_block_size == 0)
+ return 0;
+
+ ops = compressor_ops[ctype];
+
+ if (compression_level == 0)
+ compression_level = default_compression_levels[ctype];
+ if (compression_level == 0)
+ compression_level = DEFAULT_COMPRESSION_LEVEL;
+
+ if (ops->get_needed_memory) {
+ size = ops->get_needed_memory(max_block_size, compression_level,
+ destructive);
+
+ /* 0 is never valid and indicates an invalid max_block_size. */
+ if (size == 0)
+ return 0;
+ } else {
+ size = 0;