Failed to parse Float from string using playdate->system->parseString

SDK Bug Reports
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1

Seems like parseString fails to parse floats

i32 a   = 0;
f32 b   = 0;
f64 c   = 0;
i32 res = 0;
res     = PD->system->parseString("990", "%d", &a);
PD->system->logToConsole("%d = %d", a, res);
res = PD->system->parseString("1123.0", "%f", &b);
PD->system->logToConsole("%f = %d", (double)b, res);
res = PD->system->parseString("-123.0", "%lf", &c);
PD->system->logToConsole("%f = %d", c, res);

get's the following result:

990 = 1
0.000000 = 0
0.000000 = 0
3 Likes
2

I'm seeing this as well. Specifically, it works on the Simulator, but breaks on the Device. I assume the Simulator is just calling through to normal sscanf() and the Device has a custom implementation.

Simple sample:

float my_float;
int match_count = pd->system->parseString("123.456", "%f", &my_float);

Expected: match_count == 1 and my_float == 123.546.
Found on SIMULATOR: match_count == 1 and my_float == 123.546
Found on DEVICE: match_count == 0 and my_float == 0.0
Found with SSCANF() locally: match_count == 1 and my_float == 123.456

Reproducing the error:
I'm attaching a "main.c" that will output the value when dropped into the Hello World project.

main.c.zip (1.2 KB)

That program just has some lines added to the kEventInit event.

3

Hi! I’m using sscanf and noticed that the parsing is not working on the device, tried with pd->system->parseString but got the same bug. It does work on the simulator.

I’m using the latest SDK (3.0.3).