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improve segment code robustness

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* Avoid uint16 underflow in width() and height(): stop > start is possible, and means "inactive segment".

* use size_t for ledsrgbSize, _dataLen and _usedSegmentData -  uint16_t could overflow in some situations.

* try to catch attempts to allocate zero bytes (inactive segment => size 0)
This commit is contained in:
Frank
2023-06-21 01:43:26 +02:00
parent 708cd8e73d
commit 310daa61a8
4 changed files with 40 additions and 29 deletions
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4
wled00/wled.h
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@@ -8,7 +8,7 @@
*/
// version code in format yymmddb (b = daily build)
#define VERSION 2306160
#define VERSION 2306210
//uncomment this if you have a "my_config.h" file you'd like to use
//#define WLED_USE_MY_CONFIG
@@ -703,7 +703,7 @@ WLED_GLOBAL volatile bool suspendStripService _INIT(false); // WLEDMM temporaril
#ifndef ESP8266
WLED_GLOBAL char *ledmapNames[WLED_MAX_LEDMAPS-1] _INIT_N(({nullptr}));
#endif
WLED_GLOBAL uint16_t ledmapMaxSize _INIT(0); //WLEDMM TroyHack
WLED_GLOBAL size_t ledmapMaxSize _INIT(0); //WLEDMM TroyHack
#if WLED_MAX_LEDMAPS>16
WLED_GLOBAL uint32_t ledMaps _INIT(0); // bitfield representation of available ledmaps
#else