With the CLAMP macro replacing the combination of MIN and MAX, we will
have at least two advantages:
1. It's more obvious semantically.
2. There are no more mixes of confusing uses like MIN(MAX(a,b),c) and
MAX(MIN(a,b),c) and MIN(a,MAX(b,c)) appearing everywhere. We unify
the 'clamping' with a single macro.
Note that the behavior of this CLAMP macro is different from
the combination `MAX(low,MIN(x,high))`.
* This CLAMP macro expands to two comparisons instead of three from
MAX and MIN combination. In theory, this makes the code slightly
smaller, in case that (low) or (high) or both are computed at
runtime, so that compilers cannot optimize them. (The third
comparison will matter if (low)>(high); see below.)
* CLAMP has a side effect, that if (low)>(high) it will produce weird
results. Unlike MIN & MAX which will force either (low) or (high) to
win. No assertion of ((low)<=(high)) is done in this macro, for now.
This CLAMP macro is implemented like described in glib
<http://developer.gnome.org/glib/stable/glib-Standard-Macros.html>
and does not handle weird uses like CLAMP(a++, low++, high--) .
This is what OpenBSD's top(1) does when the libkvm call fails, and it's
a good idea.
This commit also fixes process name construction. The space was being
written one character too far.
I forgot how awful the process name logic was. It was an initial hack to
get it running, and I forgot to clean it up.
I also had to change a few includes and error function uses.
this caused htop to show processes as if freebsd kernel was their parent.
on next pass reparenting code took chance to run, and that caused process to jump around.
this fixed behaviour should be the correct one
KEY_RESIZE wasn't handled by the incremental search. Resulting in this
bug:
* Set your terminal window to a small size.
* Press '\' to filter the processes
* Maximize your terminal window
* The list of processes didn't resize.
This change fixes this bug.
Thank you Julian Andrews (@julianandrews) for finding this bug.
