feat: Add intelligent extraction support for regular .zip and .rar archives using system tools

src/main.c

@@ -129,6 +129,68 @@ static void strip_trailing_slash(char *path) {
   }
 }
 
+// ── Check file extension ───────────────────────────────────────────
+static bool ends_with(const char *str, const char *suffix) {
+  if (!str || !suffix)
+    return false;
+  size_t lenstr = strlen(str);
+  size_t lensuffix = strlen(suffix);
+  if (lensuffix > lenstr)
+    return false;
+  return strcasecmp(str + lenstr - lensuffix, suffix) == 0;
+}
+
+// ── Extract external archives via system ───────────────────────────
+static int extract_external_archive(const char *input_path,
+                                    const char *output_dir, const char *type) {
+  char cmd[VKZ_MAX_FILENAME * 3];
+
+  // Create output dir if specified
+  if (output_dir) {
+#ifdef _WIN32
+    snprintf(cmd, sizeof(cmd), "if not exist \"%s\" mkdir \"%s\"", output_dir,
+             output_dir);
+#else
+    snprintf(cmd, sizeof(cmd), "mkdir -p '%s'", output_dir);
+#endif
+    system(cmd);
+  }
+
+  const char *out_target = output_dir ? output_dir : ".";
+
+  if (strcmp(type, "zip") == 0) {
+    LOG_INFO("Extracting ZIP archive using system tools...");
+#ifdef _WIN32
+    snprintf(cmd, sizeof(cmd), "tar -xf \"%s\" -C \"%s\"", input_path,
+             out_target);
+#else
+    snprintf(cmd, sizeof(cmd), "unzip -q -o '%s' -d '%s'", input_path,
+             out_target);
+#endif
+  } else if (strcmp(type, "rar") == 0) {
+    LOG_INFO("Extracting RAR archive using system tools...");
+#ifdef _WIN32
+    snprintf(cmd, sizeof(cmd), "unrar x -y \"%s\" \"%s\\\"", input_path,
+             out_target);
+#else
+    snprintf(cmd, sizeof(cmd), "unrar x -y '%s' '%s/'", input_path, out_target);
+#endif
+  } else {
+    return -1;
+  }
+
+  Timer timer;
+  timer_start(&timer);
+  if (system(cmd) == 0) {
+    double time = timer_stop(&timer);
+    LOG_OK("Extraction complete! (%.3f seconds)", time);
+    return 0;
+  } else {
+    LOG_ERR("Extraction failed. Do you have %s installed?", type);
+    return 1;
+  }
+}
+
 // ── Create tar from directory ──────────────────────────────────────
 static char *tar_directory(const char *dir_path) {
   static char tar_path[VKZ_MAX_FILENAME];
@@ -416,14 +478,21 @@ static int cmd_compress(const char *input_path, const char *output_path,
 // ── Decompress command ─────────────────────────────────────────────
 static int cmd_decompress(const char *archive_path, const char *output_path,
                           bool cpu_only) {
+  // Check for standard external archives (zip, rar)
+  if (ends_with(archive_path, ".zip")) {
+    return extract_external_archive(archive_path, output_path, "zip");
+  } else if (ends_with(archive_path, ".rar")) {
+    return extract_external_archive(archive_path, output_path, "rar");
+  }
+
+  // Native VKZ decompression
   Timer total_timer;
   timer_start(&total_timer);
 
-  // Read archive
   VkzArchive *archive = vkz_read(archive_path);
-  if (!archive)
+  if (!archive) {
     return 1;
-
+  }
   vkz_print_info(archive);
 
   // Generate output path if not provided