<ldb>
all produced from original LaTeX source, compiled with LaTeX 2.09
<ldb>
the correction is only the text overflow in the originally available DVI/PS file.
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<nyx_land>
Shinmera: congrats on the kandria release!
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<NotThatRPG>
ldb: That looks great! Thanks for doing that! I still have a copy -- my third, I think -- but like the previous ones the spine is splitting because there are so many pages in a perfect binding.
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<ldb>
I'm trying to figure out how the index were generated, and include them later
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<Shinmera>
nyx_land: thanks
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<splittist>
ldb: very cool. The tabulated tables (if you see what I mean) on eg labeled pages 558/559 of the pdf are more ragged than the ones on e.g. page 563 of the physical edition. The index is vital to be able to find references to aadvarks and warm fuzzy feeling, for example. (:
<louis77>
ldb I think I missed the link, can you repost?
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<nij->
With shell command `cat file > sha1sum` I can get the sha1 of the content of the file. How to do that in CL?
<nij->
; in a native way.. if none I can call shell from CL..
<jackdaniel>
did you mean maybe `cat file | sha1sum` ?
<jackdaniel>
I think that ironclad has sha functions
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<nij->
Oh yes, a stupid typo.
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<nij->
ironclad seems a bit involving. I found sha1, which seems to do what I want. However,
<nij->
While `echo abc | sha1sum` (=> 03cfd743661f07975fa2f1220c5194cbaff48451 -),
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<phoe>
(typep 2 (type-of 1))
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<nij->
Offtopic sorry .. pjb Why is `sha1sum < file` better than `cat file | sha1sum`?
<splittist>
nij-: presumably the first avoids starting a new cat process - the shell is doing the redirection itself
<splittist>
If I apt install sbcl, am I just opening myself up for a world of hurt?
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<phoe>
not really
<nij->
I'm not sure about apt-install, but I remembered some pain when I relied on pacman for sbcl back then.
<phoe>
if you apt install cl-foo for any value of foo then the world of hurt opens
<phoe>
but the implementation itself, you can install it from apt
<splittist>
phoe: thanks
<nij->
I remember pacman also include some libs, which stumpwm would look at and complain.
* splittist
welcomes sbcl 2.0.1
<phoe>
ah yes, the beauty of debian stable
<phoe>
...wait, no, stable has 2.1.1
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<splittist>
"Hacks and glory await!" nevertheless
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<pjb>
nij-: indeed, cat | sha1sum need to for two processes instead of one, and to create a pipe. In the shell "repl" it doesn't matter much, but in shell scripts this could slow down the script. Furthermore, cat doesn't always copy the file byte-for-byte. It has options to do some formatting.
<pjb>
somebody could have: alias cat='/bin/cat -s -v' so that when it's used in the terminal to dump a file, adjacent empty lines be squeezed, and control characters printed as ^X. sha1-summing that wouldn't be meaningful.
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<phoe>
geez, (setf *read-default-float-format* 'rational) is handy
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<pjb>
phoe: but only if the implementation allows it.
<pjb>
One of the atomic type specifiers short-float, single-float, double-float, or long-float, or else some other type specifier defined by the implementation to be acceptable.
<phoe>
yes
<phoe>
my implementation allows it and it's damn convenient
<pjb>
:-)
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<splittist>
phoe: convenient for... ?
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<pjb>
splittist: using ratios instead of floating point to get exact computations.
<pjb>
now the funny thing is that ratio gives a double-float result (in ccl), instead of ratio. On the other hand, rational gives a ratio result (in ccl)…
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<phoe>
splittist: writing decimal numbers, think prices and such
<phoe>
it's more convenient for me to write 199.99 than fixed-point 19999 or direct ratio 19999/100
<phoe>
this way I avoid using floats for fixed-point numbers which is a known recipe for disaster
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<pjb>
phoe: now, there's a problem, because is it $199.99 or 199.99€ ? Hence my reader macro: #m199.99 (using the *default-currency* or with explicit currencies: '(#840m199.99 #978m199.99) --> (199.99 USD 199.99 EUR)
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<phoe>
pjb: I only have one currency so that's not a problem
<phoe>
but still, (pln 199.99) would also work for a one-arg constructor that creates an instance of PLN currency
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<jackdaniel>
is (mod (lognot x) (integer-length x)) the right way to negate insigned integer bitwise?
<jackdaniel>
unsigned*
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<jackdaniel>
expt 2 intlen
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<kakuhen>
sounds right to me... `(ldb (byte (integer-length x) 0) (lognot x))` is what I would've guessed
<jackdaniel>
makes sense, thanks
<jackdaniel>
ldb indeed seems better
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<White_Flame>
jackdaniel: I think that the numeric width should be irrelevant to the current value's bit width
<kakuhen>
well, the more i think about it, i dont think integer-length is a very good idea, because you may want to negate e.g. #b010 and expect #b101 instead of #b01 (which is what my suggestion would give)
<White_Flame>
you 2s complement negate it within a specific word length
<ldb>
you can just take the mod
<ldb>
or logand
<kakuhen>
yeah, so something like (defun unsigned-negate (byte length) (logand (1- (ash 1 length)) (lognot byte)))
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<pjb>
jackdaniel: the negate operator in CL is - (let ((unsigned-integer 42)) (- unsigned-integer)) #| --> -42 |# what do you have against it?
<phoe>
bitwise negation of an unsigned byte of a known length results in an unsigned byte
<pjb>
jackdaniel: or (lognot 42) #| --> -43 |#
<phoe>
whereas #'- results in a possibly signed-byte
<phoe>
I assume that's the problem here
<pjb>
phoe: my point, the length needs to be known before hand. And therefore (logand #xffffffff (lognot x)) eg if it's 32.
<pjb>
42 is …000101010 in binary; it's bitwise negation should be …111010101 ; computing …000101010 --> …000010101 seems meaningless to me.
<pjb>
Now, you may consider 1-complement, or 2-complement, with a predetermined word length. (logand #xff (lognot 42)) #| --> 213 |# may seem strange, but bitwise is clear: 00101010 --> 11010101
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* ldb
just completed adding lisp symbol index to CLtL2, would not consider add the glossary
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<nij->
Any CL system that helps compute "1+8*9" (=> 73) and so forth?
<White_Flame>
you mean a library to call? there is an infix-math system
<ldb>
april helps compute "1+8×9" → 73
<nij->
But I don't like typing ×..
<nij->
White_Flame Yeah.
<nij->
Input needs to be a string, and output is the calculated answer..
<morganw>
I'm pretty sure that the Winston and Horn book has a section which implements an infix form converter.
<White_Flame>
most lisp infix tools deal with (1 + 2 * 3) sorts of forms, not strings, so breaking apart the string will be a separate issue.
<ldb>
as these days there are plenty of parser generator I just recommand to try build one with them, like https://github.com/eugeneia/maxpc
<ixelp>
GitHub - eugeneia/maxpc: Max’s Parser Combinators: a simple and pragmatic library for writing parsers and lexers based o [...]
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