I used CUPS to print as pdf individual pages from the standard library. I want to get all the basic information I need easily at hand. I used unpredictableSeed in my code. It seems to be a property of something somewhere. I hope it is thread safe. Who knows? I guess I'll look at the source code like you say to try to understand. The plan is to use D as a low level programming language as much as possible. In particular to maintain the ability to translate the code to other languages as easily as possible. I wonder if there is an integer bit rotate instruction in D somewhere? I see the dmd complier doesn't convert say s3=(s3 << 45) | (s3 >>> 19); into a rotate instruction like gcc would. Maybe I need to find some optimizer settings for dmd.

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