Re: Dubious "checksum mismatch" message on log file

[Vladimir Lomov <lomov.vl@gmail.com>]

Hello,
** luigi scarso [2012-02-01 15:04:07 +0100]:
[...]

>> I was not sure, that why I began this thread. I started with latex example,
>> then strip it down to plain tex one and after that came to context
>> minimal example.
> it's also in pdftex: see
> function vf_def_font
> in
> src/texk/web2c/pdftexdir/pdftex.web

Will look in it.

>> AFAIU, context suite doesn't have "plain" pdftex and luatex formats,
>> therefore I compile minimal plain tex example with TeX Live 2011, and
>> luatex doesn't print such message though it reads vf file.
> Hm, have a look at
> tex/texmf-context/tex/generic/context/luatex

In my installation this directory doesn't have fmt files. In any case I
will look in it.

>> The problem indeed may be it luatex and how it works with vf fonts, but
>> as I said, I'm not sure (don't know very well either plain tex or context).

>> P.S. Unrelated: seems I completely lost, I read web sources, the
>> quoted extract from luatex source and I don't understand how this
>> number '32212676346' can be presented as

>> cs.b0 * 256 * 256 * 256 + cs.b1 * 256 * 256 + cs.b2 * 256 + cs.b3

>> If I don't lose my math skills the '32212676346' is
>> 32212676346=7·256^{4}+128·256^{3}+6·256^{2}+110·256^{1}+250·256^{0}
> IIRC, 32212676346 should be the checksum stored inside the file, ie
> the font_checksum.

Yes, that's right, but I forgot that this is octal number, therefore
032212676346=3526065382=210·256^{3}+43·256^{2}+124·256^{1}+230·256^{0},
so 210,43,124,230 are written in file as D2, 2B, 7C, E6 (which I found
in VF file :).

---
WBR, Vladimir Lomov

-- 
"The molars, I'm sure, will be all right, the molars can take care of
themselves," the old man said, no longer to me.  "But what will become 
of the bicuspids?"
		-- The Old Man and his Bridge
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