[Bug] r.reclass: no output + silent with large number of classes in rule

[fxi]

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Describe the bug

When trying to reclass a complex land cover map, the module fails silently. No output. No errors. So, my script fails later, as there is no error to catch.

To Reproduce

1. Extract demo.tiff + reclass.txt from sample.zip (25KB)
2. Import demo.tiff raster ( 414KB ) in a xy location, set region ext based in demo layer
3. r.reclass input=demo output=reclassed rules=reclass.txt

Expected behavior

a ) Correctly reclass b ) In case of failure, throw an error

System description

• Operating System: Linux 5.10.104-linuxkit, macOS 12.5.1
• Platform : aarch64
• GRASS GIS version : 8.0.2 (custom compilation for ARM) , 7.6.1 (x86 release)

Observation

Seems to fail when the reclass rule has more than 1023 characters

Thanks !

[fxi]

I compiled a version of r.reclass using 102400 in https://github.com/OSGeo/grass/blob/main/raster/r.reclass/main.c#L32 and it seems to be solved. I don't measure the impact of this change. parse.c and input.c have been altered too.