fix: logic/correctness bugs — issues #73, #68, #67, #66, #59, #58, #54, #48, #53

src/shared/compression.c

@@ -9,6 +9,18 @@
 
 Data* data_compress(Data* data_to_compress, int compression_level) {
   log_message(LOG_LEVEL_DEBUG, "Starting to compress data");
+
+  /* Clamp compression level to valid zstd range [1, 22] */
+  if (compression_level < 1) {
+    log_message(LOG_LEVEL_WARNING, "compression_level %d out of range [1,22], using 1",
+                compression_level);
+    compression_level = 1;
+  } else if (compression_level > 22) {
+    log_message(LOG_LEVEL_WARNING, "compression_level %d out of range [1,22], using 22",
+                compression_level);
+    compression_level = 22;
+  }
+
   size_t dst_size = ZSTD_compressBound(data_to_compress->size);
   Data* compressed_data = data_create_empty(dst_size);
   if (compressed_data == NULL)