Shell Integer with nested foreach

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LEARN ABOUT DEBIAN

libppl_c

libppl_c(3)							 libppl_c overview						       libppl_c(3)

NAME

       libppl_c - the C interface of the Parma Polyhedra Library

SYNOPSIS

       #include <ppl_c.h>

       cc file.c -lppl

DESCRIPTION

       This  is a short overview on how to use the Parma Polyhedra Library (PPL) in your C programs on Unix-like operating systems.  Note that the
       PPL has interfaces also for C++, Java, OCaml and a number of Prolog systems: look elsewhere for documentation on those.	Note also that the
       present	document  does	not  describe the library functionality, its classes or its methods and functions: see The Parma Polyhedra Library
       User's Manual (version 0.11.2) and The Parma Polyhedra Library C Language Interface User's Manual (version 0.11.2) for this kind of  infor-
       mation.

INCLUDING THE HEADER FILE

       The C interface of the PPL has only one header file, named ppl_c.h.  So your program should contain a directive of the form

       #include <ppl_c.h>

       Of course, you must make sure you installed the PPL in a place where the compiler can find it, either by itself or with the help of a suit-
       able -Idir command line option (see the file INSTALL for information on how to configure the library so that it is installed in	the  place
       of your choice).

INITIALIZING AND FINALIZING THE LIBRARY

       In order to initialize the Parma Polyhedra Library you must call the function

       int ppl_initialize(void)

       before using any of its functionalities.  It is also a good norm to call the function

       int ppl_finalize(void)

       when you are done with the library.

USING THE LIBRARY

       Keeping	in  mind  that	there is no substitute for a careful reading of The Parma Polyhedra Library User's Manual (version 0.11.2) and The
       Parma Polyhedra Library C Language Interface User's Manual (version 0.11.2) you	can  find  examples  of  use  in  the  directories  inter-
       faces/C/tests and demos/ppl_lpsol of the source distribution.

LINKING WITH THE LIBRARY

       Linking	with the C interface of the Parma Polyhedra Library is best done using the C compiler itself: usually, specifying the -lppl_c com-
       mand line option is enough.  In fact, if you use a shared version of the library, this automatically records the dependency  from  the  PPL
       core and the GMP libraries, something that the linker ought to deal with gracefully.  Otherwise you will have to add -lppl -lgmpxx -lgmp to
       the command line.  Things are more complex if you installed the PPL into some nonstandard place.  In this case you will	have  to  use  the
       -Ldir  option  and,  if you use a shared version of the library, possible take further steps: see the documentation of your system for more
       information on this subject (the Program Library HOWTO is especially valuable for GNU/Linux users).

RETURN VALUES

       All the PPL C interface functions return an int: a negative value means that an error occurred.	See The Parma Polyhedra Library C Language
       Interface User's Manual (version 0.11.2) for the error codes.

IMPLEMENTING MEMORY-GUARDED COMPUTATIONS
       One  of	the  interesting features of the Parma Polyhedra Library is the possibility to implement memory-guarded computations.  The idea is
       that you can limit the amount of virtual memory available to the process, launch  a  PPL  computation,  and  be	ready  to  be  returned  a
       PPL_ERROR_OUT_OF_MEMORY error code.  You can then take the appropriate corrective measures (e.g., simplify the polyhedra and/or select less
       precise though less complex algorithms), and restart the computation.  In order to do that, you should define alternative memory allocation
       functions for GMP that throw std::bad_alloc upon memory exhaustion.  See libppl(3) for instructions on how to do that.

USING NATIVE FLOATING POINT NUMBERS

       At  initialization  time, the Parma Polyhedra Library sets the FPU rounding mode in a way that allows its floating-point-based computations
       to be conservative (i.e., possibly approximated but correct) and reasonably efficient.  In case your application itself uses native  float-
       ing  point  numbers  and  relies  on a particular rounding mode (if you are in doubt, assume that it does rely on round-to-nearest to be in
       effect), you should use the function

       int ppl_restore_pre_PPL_rounding()

       after the PPL initialization and before using native floating point numbers in the application.	If  your  application  does  not  use  any
       floating-point-based PPL abstraction, no further measure should be taken.  Otherwise, it is imperative to call the function

       int ppl_set_rounding_for_PPL()

       before invoking any PPL interface related to such abstractions.

SEE ALSO

       ppl-config(1)

       libppl(3)

       Roberto	Bagnara, Patricia M. Hill, and Enea Zaffanella.  The Parma Polyhedra Library User's Manual (version 0.11.2), available (in several
       formats) at http://www.cs.unipr.it/ppl/ .

       Roberto Bagnara, Patricia M. Hill, and Enea Zaffanella.	The Parma Polyhedra Library C Language Interface User's Manual	(version  0.11.2),
       available (in several formats) at http://www.cs.unipr.it/ppl/ .

       David A. Wheeler.  Program Library HOWTO, available (in several formats) at http://www.dwheeler.com/program-library/ .

AVAILABILITY

       The latest version of the Parma Polyhedra Library and all the documentation is available at http://www.cs.unipr.it/ppl/ .

AUTHOR

       See the file CREDITS in the source distribution or use the command ppl-config --credits for a list of contributors.

REPORTING BUGS

       Report bugs to <ppl-devel@cs.unipr.it>.

COPYRIGHT

       Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it> Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
       This is free software; see the file COPYING in the source distribution or use the command ppl-config --copying to obtain the copying condi-
       tions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

PPL 0.11.2							   February 2011						       libppl_c(3)

Shell Programming and Scripting