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Merge remote-tracking branch 'origin/integration' into integration

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J. Nick Koston 2025-07-07 16:34:03 -05:00
commit a80d3012bd
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1 changed files with 21 additions and 1 deletions
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22
esphome/components/logger/logger.cpp
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@ -90,6 +90,25 @@ void HOT Logger::log_vprintf_(uint8_t level, const char *tag, int line, const ch
#ifdef USE_STORE_LOG_STR_IN_FLASH #ifdef USE_STORE_LOG_STR_IN_FLASH
// Implementation for ESP8266 with flash string support. // Implementation for ESP8266 with flash string support.
// Note: USE_STORE_LOG_STR_IN_FLASH is only defined for ESP8266. // Note: USE_STORE_LOG_STR_IN_FLASH is only defined for ESP8266.
//
// This function handles format strings stored in flash memory (PROGMEM) to save RAM.
// The buffer is used in a special way to avoid allocating extra memory:
//
// Memory layout during execution:
// Step 1: Copy format string from flash to buffer
// tx_buffer_: [format_string][null][.....................]
// tx_buffer_at_: ------------------^
// msg_start: saved here -----------^
//
// Step 2: format_log_to_buffer_with_terminator_ reads format string from beginning
// and writes formatted output starting at msg_start position
// tx_buffer_: [format_string][null][formatted_message][null]
// tx_buffer_at_: -------------------------------------^
//
// Step 3: Output the formatted message (starting at msg_start)
// write_msg_ and callbacks receive: this->tx_buffer_ + msg_start
// which points to: [formatted_message][null]
//
void Logger::log_vprintf_(uint8_t level, const char *tag, int line, const __FlashStringHelper *format, void Logger::log_vprintf_(uint8_t level, const char *tag, int line, const __FlashStringHelper *format,
va_list args) { // NOLINT va_list args) { // NOLINT
if (level > this->level_for(tag) || global_recursion_guard_) if (level > this->level_for(tag) || global_recursion_guard_)
@ -121,7 +140,8 @@ void Logger::log_vprintf_(uint8_t level, const char *tag, int line, const __Flas
if (this->baud_rate_ > 0) { if (this->baud_rate_ > 0) {
this->write_msg_(this->tx_buffer_ + msg_start); this->write_msg_(this->tx_buffer_ + msg_start);
} }
size_t msg_length = this->tx_buffer_at_ - msg_start - 1; // -1 to exclude null terminator size_t msg_length =
this->tx_buffer_at_ - msg_start; // Don't subtract 1 - tx_buffer_at_ is already at the null terminator position
this->log_callback_.call(level, tag, this->tx_buffer_ + msg_start, msg_length); this->log_callback_.call(level, tag, this->tx_buffer_ + msg_start, msg_length);
global_recursion_guard_ = false; global_recursion_guard_ = false;