tg_cpphost: Add WARN_ONCE macro and use it

src/CompilerInTelegram.cpp

@@ -5,6 +5,7 @@
 #include <Logging.h>
 #include <NamespaceImport.h>
 #include <utils/libutils.h>
+#include <utils/LinuxPort.h>
 
 #include <chrono>
 #include <fstream>

src/main.cpp

@@ -12,6 +12,7 @@
 #include <TimerImpl.h>
 #include <Types.h>
 #include <tgbot/tgbot.h>
+#include <utils/LinuxPort.h>
 
 #include <algorithm>
 #include <boost/algorithm/string/replace.hpp>
@@ -285,6 +286,8 @@ int main(void) {
             bot.getApi().deleteMessage(message->chat->id, message->messageId);
         } catch (const TgBot::TgException &) {
             // bot is not admin. nothing it can do
+            WARN_ONCE(1, "bot is not admin in chat " LONGFMT ", cannot use decho!",
+                      message->chat->id);
             return;
         }
         if (hasExtArgs(message)) {

src/utils/LinuxPort.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <Logging.h>  // LOG_W
+
+#include "config.h"
+#define IS_DEFINED IS_BUILTIN
+
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
+#define WARN_ONCE(condition, format...) ({        \
+    static bool __warned;                         \
+    int __ret_warn_once = !!(condition);          \
+                                                  \
+    if (unlikely(__ret_warn_once && !__warned)) { \
+        __warned = true;                          \
+        LOG_W(format);                            \
+    }                                             \
+    unlikely(__ret_warn_once);                    \
+})

src/utils/libutils.cpp

@@ -1,4 +1,5 @@
 #include "libutils.h"
+#include "LinuxPort.h"
 
 #include <Logging.h>
 #include <RuntimeException.h>

src/utils/libutils.h

@@ -47,6 +47,3 @@ bool runCommand(const std::string& command, std::string& res);
 
 // MIME
 std::string getMIMEString(const std::string& path);
-
-#include "config.h"
-#define IS_DEFINED IS_BUILTIN