add data compression and decompression

src/shared/data.c

@@ -0,0 +1,70 @@
+
+#include "data.h"
+#include "log.h"
+#include "stdlib.h"
+#include "zstd.h"
+
+Data *data_create_empty(size_t data_size) {
+  void *data = malloc(data_size);
+  if (data == NULL) {
+    log_message(LOG_LEVEL_ERROR, "Could not allocate memory for empty data");
+    exit(EXIT_FAILURE);
+  }
+  return data_create(data, data_size);
+}
+
+Data *data_create(void *data, size_t data_size) {
+  Data *new_data = malloc(sizeof(Data));
+  if (new_data == NULL) {
+    log_message(LOG_LEVEL_ERROR, "Could not allocate memory for data");
+    exit(EXIT_FAILURE);
+  }
+  new_data->data = data;
+  new_data->size = data_size;
+  return data;
+}
+
+void data_destroy(Data *data) {
+  free(data->data);
+  free(data);
+}
+
+Data *compress_data(Data *data_to_compress, int compression_level) {
+  log_message(LOG_LEVEL_DEBUG, "Starting to compress data");
+  Data *compressed_data =
+      data_create_empty(ZSTD_compressBound(data_to_compress->size));
+
+  compressed_data->size = ZSTD_compress(
+      compressed_data->data, compressed_data->size, data_to_compress->data,
+      data_to_compress->size, compression_level);
+  if (ZSTD_isError(compressed_data->size)) {
+    log_message(LOG_LEVEL_ERROR, "Compression failed: %s",
+                ZSTD_getErrorName(compressed_data->size));
+    exit(EXIT_FAILURE);
+  }
+
+  log_message(LOG_LEVEL_DEBUG, "Data succesfully compressed");
+  return compressed_data;
+}
+
+Data *decompress_data(Data *compressed_data) {
+  log_message(LOG_LEVEL_DEBUG, "Start to decompress data");
+  Data *uncompressed_data = data_create_empty(
+      ZSTD_getFrameContentSize(compressed_data->data, compressed_data->size));
+  if (ZSTD_isError(uncompressed_data->size)) {
+    log_message(LOG_LEVEL_ERROR, "Decompression failed: %s",
+                ZSTD_getErrorName(uncompressed_data->size));
+    exit(EXIT_FAILURE);
+  }
+
+  uncompressed_data->size =
+      ZSTD_decompress(uncompressed_data->data, uncompressed_data->size,
+                      compressed_data->data, compressed_data->size);
+  if (ZSTD_isError(uncompressed_data->size)) {
+    log_message(LOG_LEVEL_ERROR, "Decompression failed: %s",
+                ZSTD_getErrorName(uncompressed_data->size));
+    exit(EXIT_FAILURE);
+  }
+  log_message(LOG_LEVEL_DEBUG, "Decompressed data successfully");
+  return uncompressed_data;
+}