Add interface for changing maximum log file size.

GitOrigin-RevId: dccd781c0467d75a5a396b71e6401e68534919db

td/telegram/Log.cpp

@@ -6,23 +6,35 @@
 //
 #include "td/telegram/Log.h"
 
+#include "td/utils/common.h"
 #include "td/utils/FileLog.h"
 #include "td/utils/logging.h"
 
+#include <algorithm>
+
 namespace td {
-void Log::set_file_path(string path) {
-  if (path.empty()) {
+
+static FileLog file_log;
+static TsLog ts_log(&file_log);
+static int64 max_log_file_size = 10 << 20;
+
+void Log::set_file_path(string file_path) {
+  if (file_path.empty()) {
     log_interface = default_log_interface;
     return;
   }
 
-  static FileLog file_log;
-  static TsLog ts_log(&file_log);
-  file_log.init(path);
+  file_log.init(file_path, max_log_file_size);
   log_interface = &ts_log;
 }
 
+void Log::set_max_file_size(int64 max_file_size) {
+  max_log_file_size = std::max(max_file_size, static_cast<int64>(0));
+  file_log.set_rotate_threshold(max_log_file_size);
+}
+
 void Log::set_verbosity_level(int new_verbosity_level) {
   SET_VERBOSITY_LEVEL(VERBOSITY_NAME(FATAL) + new_verbosity_level);
 }
+
 }  // namespace td

td/telegram/Log.h

@@ -12,6 +12,7 @@
  * By default TDLib writes logs to stderr or an OS specific log and uses a verbosity level of 5.
  */
 
+#include <cstdint>
 #include <string>
 
 namespace td {
@@ -27,10 +28,19 @@ class Log {
    * By default TDLib writes logs to stderr or an OS specific log.
    * Use this method to write the log to a file instead.
    *
-   * \param[in]  path Path to a file where the internal TDLib log will be written. Use an empty path to switch back to
-   *                  the default logging behaviour.
+   * \param[in]  file_path Path to a file where the internal TDLib log will be written. Use an empty path to
+   *                       switch back to the default logging behaviour.
    */
-  static void set_file_path(std::string path);
+  static void set_file_path(std::string file_path);
+
+  /**
+   * Sets maximum size of the file to where the internal TDLib log is written before the file will be auto-rotated.
+   * Unused if log is not written to a file. Defaults to 10 MB.
+   *
+   * \param[in]  max_file_size Maximum size of the file to where the internal TDLib log is written before the file
+   *                           will be auto-rotated. Should be positive.
+   */
+  static void set_max_file_size(std::int64_t max_file_size);
 
   /**
    * Sets the verbosity level of the internal logging of TDLib.

td/telegram/td_log.cpp

@@ -8,8 +8,12 @@
 
 #include "td/telegram/Log.h"
 
-void td_set_log_file_path(const char *path) {
-  td::Log::set_file_path(path);
+void td_set_log_file_path(const char *file_path) {
+  td::Log::set_file_path(file_path == nullptr ? "" : file_path);
+}
+
+void td_set_log_max_file_size(long long max_file_size) {
+  td::Log::set_max_file_size(static_cast<std::int64_t>(max_file_size));
 }
 
 void td_set_log_verbosity_level(int new_verbosity_level) {

td/telegram/td_log.h

@@ -23,10 +23,19 @@ extern "C" {
  * By default TDLib writes logs to stderr or an OS specific log.
  * Use this method to write the log to a file instead.
  *
- * \param[in]  path Path to a file where the internal TDLib log will be written. Use an empty path to switch back to
- *                  the default logging behaviour.
+ * \param[in]  file_path Path to a file where the internal TDLib log will be written. Use an empty path to
+ *                       switch back to the default logging behaviour.
  */
-TDJSON_EXPORT void td_set_log_file_path(const char *path);
+TDJSON_EXPORT void td_set_log_file_path(const char *file_path);
+
+/**
+ * Sets maximum size of the file to where the internal TDLib log is written before the file will be auto-rotated.
+ * Unused if log is not written to a file. Defaults to 10 MB.
+ *
+ * \param[in]  max_file_size Maximum size of the file to where the internal TDLib log is written before the file
+ *                           will be auto-rotated. Should be positive.
+ */
+TDJSON_EXPORT void td_set_log_max_file_size(long long max_file_size);
 
 /**
  * Sets the verbosity level of the internal logging of TDLib.

tdutils/td/utils/FileLog.h

@@ -66,6 +66,10 @@ class FileLog : public LogInterface {
     rotate_threshold_ = rotate_threshold;
   }
 
+  void set_rotate_threshold(int64 rotate_threshold) {
+    rotate_threshold_ = rotate_threshold;
+  }
+
  private:
   FileFd fd_;
   string path_;