From c20f0c3d9710ae66ba3e612bfa5d51c7e4130517 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Sun, 18 Sep 2022 01:17:09 +0300
Subject: [PATCH] Improve dump of short MemoryLog.

---
 telegram-bot-api/telegram-bot-api.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/telegram-bot-api/telegram-bot-api.cpp b/telegram-bot-api/telegram-bot-api.cpp
index f5cc937..ac91d78 100644
--- a/telegram-bot-api/telegram-bot-api.cpp
+++ b/telegram-bot-api/telegram-bot-api.cpp
@@ -80,8 +80,15 @@ static td::MemoryLog<1 << 20> memory_log;
 void print_log() {
   auto buf = memory_log.get_buffer();
   auto pos = memory_log.get_pos();
+  size_t tail_length = buf.size() - pos;
+  while (tail_length > 0 && buf[pos + tail_length - 1] == ' ') {
+    tail_length--;
+  }
+  if (tail_length + 100 >= buf.size() - pos) {
+    tail_length = buf.size() - pos;
+  }
   td::signal_safe_write("------- Log dump -------\n");
-  td::signal_safe_write(buf.substr(pos), false);
+  td::signal_safe_write(buf.substr(pos, tail_length), false);
   td::signal_safe_write(buf.substr(0, pos), false);
   td::signal_safe_write("\n", false);
   td::signal_safe_write("------------------------\n");