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protect from NULL deref if running without prog track

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This commit is contained in:
Harald Barth 2022-08-13 01:52:44 +02:00
parent a985356f0c
commit da8b189b43
1 changed files with 2 additions and 0 deletions
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2
DCCWaveform.h
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@ -59,10 +59,12 @@ class DCCWaveform {
#else #else
// extrafudge is added when we know that the resets will first come extrafudge packets in the future // extrafudge is added when we know that the resets will first come extrafudge packets in the future
inline void clearResets(byte extrafudge=0) { inline void clearResets(byte extrafudge=0) {
if ((isMainTrack ? rmtMainChannel : rmtProgChannel) == NULL) return;
resetPacketBase = isMainTrack ? rmtMainChannel->packetCount() : rmtProgChannel->packetCount(); resetPacketBase = isMainTrack ? rmtMainChannel->packetCount() : rmtProgChannel->packetCount();
resetPacketBase += extrafudge; resetPacketBase += extrafudge;
}; };
inline byte getResets() { inline byte getResets() {
if ((isMainTrack ? rmtMainChannel : rmtProgChannel) == NULL) return 0;
uint32_t packetcount = isMainTrack ? uint32_t packetcount = isMainTrack ?
rmtMainChannel->packetCount() : rmtProgChannel->packetCount(); rmtMainChannel->packetCount() : rmtProgChannel->packetCount();
uint32_t count = packetcount - resetPacketBase; // Beware of unsigned interger arithmetic. uint32_t count = packetcount - resetPacketBase; // Beware of unsigned interger arithmetic.