I'm writing a portable implementation of the C standard library for http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
Sincerely, Gregory Pietsch 110  8585 
"Gregory Pietsch" <GK**@flash.net > wrote in message
news:11******** **************@ i39g2000cwa.goo glegroups.com.. . I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
At a quick glance, I'd say you're violating my copyright in the
most blatant and irresponsible manner. If the infringing stuff
isn't off the internet in short order, I will be taking legal
action.
P.J. Plauger
Dinkumware, Ltd. http://www.dinkumware.com
Gregory Pietsch a écrit : I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
Sincerely, Gregory Pietsch
You write in math.h:
/* The <math.h> header shall provide for the following constants. The
values
are of type double and are accurate within the precision of the double
type.
*/
#define M_E (2.718281828459 045235360287471 3526624977572)
/* Value of e */
#define M_LOG2E (1.442695040888 963407359924681 0018921374266)
/* Value of log2e */
[snip]
#define M_SQRT1_2 (0.707106781186 547524400844362 1048490392848)
/* Value of 1/sqrt(2) */
---------------------------------------------------------------------
Where do you have that from?
It is not in the C99 standard... Maybe in some other standard?
jacob
jacob navia <ja***@jacob.re mcomp.fr> writes: Gregory Pietsch a icrit :
#define M_E (2.718281828459 045235360287471 3526624977572)
/* Value of e */
#define M_LOG2E (1.442695040888 963407359924681 0018921374266)
/* Value of log2e */
[...]
Where do you have that from?
They're in SUSv3, at least. Not in C99 though.
--
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan
On 2006-03-11, P.J. Plauger <pj*@dinkumware .com> wrote: "Gregory Pietsch" <GK**@flash.net > wrote in message
news:11******** **************@ i39g2000cwa.goo glegroups.com.. .
I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
At a quick glance, I'd say you're violating my copyright in the
most blatant and irresponsible manner. If the infringing stuff
isn't off the internet in short order, I will be taking legal
action.
Which pages are infringing? the header itself, the implementation files,
or all? (Unfortunately, even if he removes it, it won't be out of the
history - who are the admins of the clc-wiki?)
jacob navia wrote: Gregory Pietsch a écrit : I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
Sincerely, Gregory Pietsch
You write in math.h:
/* The <math.h> header shall provide for the following constants. The
values
are of type double and are accurate within the precision of the double
type.
*/
#define M_E (2.718281828459 045235360287471 3526624977572)
/* Value of e */
#define M_LOG2E (1.442695040888 963407359924681 0018921374266)
/* Value of log2e */
[snip]
#define M_SQRT1_2 (0.707106781186 547524400844362 1048490392848)
/* Value of 1/sqrt(2) */
---------------------------------------------------------------------
Hi, jacob:
You wrote (to complete the quoted material above):
Where do you have that from?
It is not in the C99 standard... Maybe in some other standard?
I have no idea how Gregory Pietsch went about preparing his math.h
or its "portable" implementation. The #define's above are consistent
with this math.h specification, copyright 1997 by The Open Group: http://www.opengroup.org/onlinepubs/...sh/math.h.html
By C99 most writers seem to mean ISO/IEC 9899:1999 as amended
by a couple of corrections. See for example this page at gnu.org: http://gcc.gnu.org/c99status.html
A rationale for the new standard and a copy of the working paper that
incorporates certain corrections are linked here: http://www.open-std.org/JTC1/SC22/WG14/www/standards
This document has more than one hundred references to math.h,
many of them in Annex F on floating-point arithmetic.
Note copyrights in standards are often held by the bodies which
produce them. This is useful in maintaining the integrity of these
published works but often surprises those who expect "informatio n
should be free".
For this reason there is an official policy that printed copies of ISO
(International Organization for Standardization ) standards should be
obtained through ones national member organization, links to lists
of which are here: http://www.iso.org/iso/en/aboutiso/i...ers/index.html
regards, chip
On Sat, 11 Mar 2006 16:41:16 -0500, in comp.lang.c , "P.J. Plauger"
<pj*@dinkumware .com> wrote: "Gregory Pietsch" <GK**@flash.net > wrote in message
news:11******* *************** @i39g2000cwa.go oglegroups.com. ..
I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
At a quick glance, I'd say you're violating my copyright in the
most blatant and irresponsible manner. If the infringing stuff
isn't off the internet in short order, I will be taking legal
action.
At a quick glance, I saw one mention of PJ Plauger, in reference to an
algorithm. The rest looked like a fairly standard way to implement the
functions. Perhaps it would be helpful to indicate precisely what you
believe to be infringing.
Mark McIntyre
--
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan
----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----
Mark McIntyre <ma**********@s pamcop.net> writes: On Sat, 11 Mar 2006 16:41:16 -0500, in comp.lang.c , "P.J. Plauger"
<pj*@dinkumware .com> wrote:
"Gregory Pietsch" <GK**@flash.net > wrote in message
news:11****** *************** *@i39g2000cwa.g ooglegroups.com ...
I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
At a quick glance, I'd say you're violating my copyright in the
most blatant and irresponsible manner. If the infringing stuff
isn't off the internet in short order, I will be taking legal
action.
At a quick glance, I saw one mention of PJ Plauger, in reference to an
algorithm. The rest looked like a fairly standard way to implement the
functions. Perhaps it would be helpful to indicate precisely what you
believe to be infringing.
I compared a few files in the clc-wiki.net implementation against
those in _The Standard C Library_. The former is obviously a
derivative work of the latter, made without acknowledgments and
(now obviously) without permission.
--
"A lesson for us all: Even in trivia there are traps."
--Eric Sosman
P.J. Plauger said: "Gregory Pietsch" <GK**@flash.net > wrote in message
news:11******** **************@ i39g2000cwa.goo glegroups.com.. .
I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
At a quick glance, I'd say you're violating my copyright in the
most blatant and irresponsible manner. If the infringing stuff
isn't off the internet in short order, I will be taking legal
action.
I haven't looked, and don't plan to, so I don't know whether you're right or
not. And I think you already know that I hold you in pretty high esteem for
the huge amount you've done for the C language. But can I just put in a
plea for Gregory Pietsch?
Gregory is a longstanding contributor to comp.lang.c, and he's basically a
decent chap. If he screwed up on this occasion, I am quite sure that he
will be prepared to take down the offending material without your having to
use such - um - forthright tactics.
Ordinary, decent, law-abiding folk do make mistakes sometimes, and whilst
threatening them with legal action is undoubtedly a very effective
approach, perhaps it is best reserved for a back-up strategy, should an
initial request be rejected or ignored.
--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999 http://www.cpax.org.uk
email: rjh at above domain (but drop the www, obviously)
On 2006-03-12, Ben Pfaff <bl*@cs.stanfor d.edu> wrote: Mark McIntyre <ma**********@s pamcop.net> writes:
On Sat, 11 Mar 2006 16:41:16 -0500, in comp.lang.c , "P.J. Plauger"
<pj*@dinkumware .com> wrote:
"Gregory Pietsch" <GK**@flash.net > wrote in message
news:11***** *************** **@i39g2000cwa. googlegroups.co m...
I'm writing a portable implementation of the C standard library for
http://www.clc-wiki.net and I was wondering if someone could check the
functions in math.h for sanity/portability/whatever. I'm almost halfway
through writing the over 200 functions needed to implement C99's
version of math.h, and I would like to have some feedback and/or expert
advice on my implementations .
At a quick glance, I'd say you're violating my copyright in the
most blatant and irresponsible manner. If the infringing stuff
isn't off the internet in short order, I will be taking legal
action.
At a quick glance, I saw one mention of PJ Plauger, in reference to an
algorithm. The rest looked like a fairly standard way to implement the
functions. Perhaps it would be helpful to indicate precisely what you
believe to be infringing.
I compared a few files in the clc-wiki.net implementation against
those in _The Standard C Library_. The former is obviously a
derivative work of the latter, made without acknowledgments and
(now obviously) without permission.
Which ones did you look at? The ones I looked at looked like A) they
were probably fairly obvious implementation techniques and B) they were
simple enough to have been independently arrived at. Or were you
threatening legal action based on mere access and similarity with no
other basis? [Note: IANAL] It's possible that I didn't see the ones you
did, though, I didn't look very thoroughly through it. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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