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replace VLAs with standard C++

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proddy
2025-12-12 00:00:49 +01:00
parent 55b8c2d04c
commit e34291fbd5
2 changed files with 9 additions and 7 deletions
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8
src/core/mqtt.cpp
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@@ -222,9 +222,11 @@ void Mqtt::on_message(const char * topic, const uint8_t * payload, size_t len) {
// the payload is not terminated
// convert payload to a null-terminated char string
// see https://www.emelis.net/espMqttClient/#code-samples
char message[len + 1];
memcpy(message, payload, len);
message[len] = '\0';
// fix variable-length arrays (VLAs) "char message[len + 1]" as they are not standard C++; they're a Clang/GCC extension.
std::vector<char> message_buffer(len + 1);
memcpy(message_buffer.data(), payload, len);
message_buffer[len] = '\0';
char * message = message_buffer.data();
#if defined(EMSESP_DEBUG)
if (len) {