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time: Make std::string version of strftime() avoid runaway memory allocations (#5348)

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This commit is contained in:
Kevin P. Fleming
2023-09-11 16:02:07 -04:00
committed by GitHub
parent 892d2ce34f
commit deb34c9473
2 changed files with 9 additions and 0 deletions
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esphome/core/time.h
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@@ -45,6 +45,10 @@ struct ESPTime {
*
* @warning This method uses dynamically allocated strings which can cause heap fragmentation with some
* microcontrollers.
*
* @warning This method can return "ERROR" when the underlying strftime() call fails, e.g. when the
* format string contains unsupported specifiers or when the format string doesn't produce any
* output.
*/
std::string strftime(const std::string &format);