Handle CURLMcode without macro

lib/client.cpp

@@ -9,34 +9,25 @@ namespace coeurl {
 std::shared_ptr<spdlog::logger> Client::log =
     spdlog::null_logger_mt("coeurl_null");
 
-#define mycase(code)                                                           \
-  case code:                                                                   \
-    s = __STRING(code)
-
 /* Die if we get a bad CURLMcode somewhere */
 void Client::mcode_or_die(const char *where, CURLMcode code) {
   if (CURLM_OK != code) {
-    const char *s;
+    const char *s = curl_multi_strerror(code);
     switch (code) {
-      mycase(CURLM_BAD_HANDLE);
-      break;
-      mycase(CURLM_BAD_EASY_HANDLE);
-      break;
-      mycase(CURLM_OUT_OF_MEMORY);
-      break;
-      mycase(CURLM_INTERNAL_ERROR);
-      break;
-      mycase(CURLM_UNKNOWN_OPTION);
-      break;
-      mycase(CURLM_LAST);
+    case CURLM_BAD_SOCKET:
+      Client::log->error("{} returns {}", where, s);
+      /* ignore this error */
+      return;
+    case CURLM_BAD_HANDLE:
+    case CURLM_BAD_EASY_HANDLE:
+    case CURLM_OUT_OF_MEMORY:
+    case CURLM_INTERNAL_ERROR:
+    case CURLM_UNKNOWN_OPTION:
+    case CURLM_LAST:
       break;
     default:
       s = "CURLM_unknown";
       break;
-      mycase(CURLM_BAD_SOCKET);
-      Client::log->error("{} returns {}", where, s);
-      /* ignore this error */
-      return;
     }
     Client::log->critical("{} returns {}", where, s);
     throw std::runtime_error(s);