code now for 10 days). The last commit fixed an error when using
drcCanonicalMaxwidth() multiple times in DRC rule checks on a single
edge. At the time, I also added a method to save some
drcCanonicalMaxwidth() results to prevent needlessly re-doing the
same (potentially expensive) computation over and over. However,
where I reused the cached result, I did not check if the number of
entries is zero. Other code does not check the number of entries
and depends on the prior behavior that drcCanonicalMaxwidth()
returns NULL when there are no entries. So the code needed to check
if the number of entries is zero before re-using the cached result.
Without the fix, any time the caching is used, the last computed
maximum area rectangle will be made active even when the current
check area does not meet the area requirement, resulting in many
false positive errors.
command, but with some critical differences, since the "crash"
command is designed for crash backups. "crash" will save in a
temp file and removes the file after a successful recovery.
"archive" can be used at any time to make a complete snapshot of
a layout in a single file, or to read back that snapshot.
There is a "writeall" option that will make a snapshot including
layout of all read-only (PDK) cells.
The website documentation now points to these contents in a clone
of the repository on opencircuitdesign.com, so all future edits of
the command-line documentation will be made directly to the git
repository. Also: Changed the precision of box values printed in
microns from 2 to 3 digits after the decimal place, so that 5 nanometer
grids do not get values clipped in the output.
R. Timothy Edwards