Skip to content

Add div by zero check back into WMath::map#4853

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
me-no-dev merged 3 commits into from
Feb 24, 2021
Merged

Add div by zero check back into WMath::map #4853

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
09e6e86
Add div by zero check back into WMath::map
lbernstone Feb 23, 2021
30447f4
Add a log_e on map div0
lbernstone Feb 23, 2021
d8c0975
include esp32-hal-log.h
me-no-dev Feb 24, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 5 additions & 1 deletion cores/esp32/WMath.cpp
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -27,6 +27,7 @@ extern "C"{
#include <stdlib.h>
#include "esp_system.h"
}
#include "esp32-hal-log.h"

void randomSeed(unsigned long seed)
{
Expand DownExpand Up@@ -69,7 +70,10 @@ long map(long x, long in_min, long in_max, long out_min, long out_max){
const long dividend = out_max - out_min;
const long divisor = in_max - in_min;
const long delta = x - in_min;

if(divisor == 0){
log_e("Invalid map input range, min == max");
return -1; //AVR returns -1, SAM returns 0
}
return (delta * dividend + (divisor / 2)) / divisor + out_min;
}

Expand Down