text: /**************************************************************************
  *    This is the header file for Version 2.4 of nauty().                  *
  *    nauty.h.  Generated from nauty-h.in by configure.
  **************************************************************************/
  
  #ifndef  _NAUTY_H_    /* only process this file once */
  #define  _NAUTY_H_
  
  /* The parts between the ==== lines are modified by configure when
  creating nauty.h out of nauty-h.in.  If configure is not being used,
  it is necessary to check they are correct.
  ====================================================================*/
  
  /* Check whether various headers are available */
  #define HAVE_UNISTD_H  1    /* <unistd.h> */
  #define HAVE_SYSTYPES_H  1    /* <sys/types.h> */
  #define HAVE_STDDEF_H  1     /* <stddef.h> */
  #define HAVE_STDLIB_H  1    /* <stdlib.h> */
  #define HAVE_STRING_H  1    /* <string.h> */
  #define MALLOC_DEC 1  /* 1 = malloc() is declared in stdlib.h,
  				 2 = in malloc.h, 0 = in neither place */
  #define HAS_MATH_INF 1 /* INFINITY is defined in math.h or
  				some system header likely to be used */
  #define HAS_STDIO_UNLOCK 1  /* Whether there are getc_unlocked,
  		putc_unlocked,flockfile and funlockfile*/
  
  #define SIZEOF_INT 4
  #define SIZEOF_LONG 4
  #define SIZEOF_LONG_LONG 8   /* 0 if nonexistent */
  
  #define HAVE_CONST 1    /* compiler properly supports const */
  
  /*==================================================================*/
  
  /* The following line must be uncommented for compiling into Magma. */
  /* #define NAUTY_IN_MAGMA  */
  
  #ifdef NAUTY_IN_MAGMA
  #include "defs.h"
  #include "system.h"
  #include "bs.h"
  #define OLDEXTDEFS
  #else
  #include <stdio.h>
  #define P_(x) x
  #endif
  
  #if defined(__cray) || defined(__cray__) || defined(cray)
  #define SYS_CRAY        /* Cray UNIX, portable or standard C */
  #endif
  
  #if defined(__unix) || defined(__unix__) || defined(unix)
  #define SYS_UNIX
  #endif
  
  #if !HAVE_CONST
  #define const
  #endif
  
  /*****************************************************************************
  *                                                                            *
  *    AUTHOR: Brendan D. McKay                                                *
  *            Computer Science Department                                     *
  *            Australian National University                                  *
  *            Canberra, ACT 0200, Australia                                   *
  *            phone:  +61 2 6125 3845    fax:  +61 2 6125 0010                *
  *            email:  bdm@cs.anu.edu.au                                       *
  *                                                                            *
  *   Copyright (1984-2007) Brendan McKay.  All rights reserved.  Permission   *
  *   is hereby given for use and/or distribution with the exception of        *
  *   sale for profit or application with nontrivial military significance.    *
  *   You must not remove this copyright notice, and you must document any     *
  *   changes that you make to this program.                                   *
  *   This software is subject to this copyright only, irrespective of         *
  *   any copyright attached to any package of which this is a part.           *
  *                                                                            *
  *   This program is only provided "as is".  No responsibility will be taken  *
  *   by the author, his employer or his pet rabbit* for any misfortune which  *
  *   befalls you because of its use.  I don't think it will delete all your   *
  *   files, burn down your computer room or turn your children against you,   *
  *   but if it does: stiff cheddar.  On the other hand, I very much welcome   *
  *   bug reports, or at least I would if there were any bugs.                 *
  *                                                       * RIP, 1989          *
  *                                                                            *
  *   If you wish to acknowledge use of this program in published articles,    *
  *   please do so by citing the User's Guide:                                 *
  *                                                                            *
  *     B. D. McKay, nauty User's Guide (Version 2.4), 
  *         http://cs.anu.edu.au/~bdm/nauty/.
  *                                                                            *
  *   CHANGE HISTORY                                                           *
  *       10-Nov-87 : final changes for version 1.2                            *
  *        5-Dec-87 : renamed to version 1.3 (no changes to this file)         *
  *       28-Sep-88 : added PC Turbo C support, making version 1.4             *
  *       23-Mar-89 : changes for version 1.5 :                                *
  *                   - reworked M==1 code                                     *
  *                   - defined NAUTYVERSION string                            *
  *                   - made NAUTYH_READ to allow this file to be read twice   *
  *                   - added optional ANSI function prototypes                *
  *                   - added validity check for WORDSIZE                      *
  *                   - added new fields to optionblk structure                *
  *                   - updated DEFAULTOPTIONS to add invariants fields        *
  *                   - added (set*) cast to definition of GRAPHROW            *
  *                   - added definition of ALLOCS and FREES                   *
  *       25-Mar-89 : - added declaration of new function doref()              *
  *                   - added UNION macro                                      *
  *       29-Mar-89 : - reduced the default MAXN for small machines            *
  *                   - removed OUTOFSPACE (no longer used)                    *
  *                   - added SETDIFF and XOR macros                           *
  *        2-Apr-89 : - extended statsblk structure                            *
  *        4-Apr-89 : - added IS_* macros                                      *
  *                   - added ERRFILE definition                               *
  *                   - replaced statsblk.outofspace by statsblk.errstatus     *
  *        5-Apr-89 : - deleted definition of np2vector (no longer used)       *
  *                   - introduced EMPTYSET macro                              *
  *       12-Apr-89 : - eliminated MARK, UNMARK and ISMARKED (no longer used)  *
  *       18-Apr-89 : - added MTOOBIG and CANONGNIL                            *
  *       12-May-89 : - made ISELEM1 and ISELEMENT return 0 or 1               *
  *        2-Mar-90 : - added EXTPROC macro and used it                        *
  *       12-Mar-90 : - added SYS_CRAY, with help from N. Sloane and A. Grosky *
  *                   - added dummy groupopts field to optionblk               *
  *                   - select some ANSI things if __STDC__ exists             *
  *       20-Mar-90 : - changed default MAXN for Macintosh versions            *
  *                   - created SYS_MACTHINK for Macintosh THINK compiler      *
  *       27-Mar-90 : - split SYS_MSDOS into SYS_PCMS4 and SYS_PCMS5           *
  *       13-Oct-90 : changes for version 1.6:                                 *
  *                   - fix definition of setword for WORDSIZE==64             *
  *       14-Oct-90 : - added SYS_APOLLO version to avoid compiler bug         *
  *       15-Oct-90 : - improve detection of ANSI conformance                  *
  *       17-Oct-90 : - changed temp name in EMPTYSET to avoid A/UX bug        *
  *       16-Apr-91 : changes for version 1.7:                                 *
  *                   - made version SYS_PCTURBO use free(), not cfree()       *
  *        2-Sep-91 : - noted that SYS_PCMS5 also works for Quick C            *
  *                   - moved MULTIPLY to here from nauty.c                    *
  *       12-Jun-92 : - changed the top part of this comment                   *
  *       27-Aug-92 : - added version SYS_IBMC, thanks to Ivo Duentsch         *
  *        5-Jun-93 : - renamed to version 1.7+, only change in naututil.h     *
  *       29-Jul-93 : changes for version 1.8:                                 *
  *                   - fixed error in default 64-bit version of FIRSTBIT      *
  *                     (not used in any version before ALPHA)                 *
  *                   - installed ALPHA version (thanks to Gordon Royle)       *
  *                   - defined ALLOCS,FREES for SYS_IBMC                      *
  *        3-Sep-93 : - make calloc void* in ALPHA version                     *
  *       17-Sep-93 : - renamed to version 1.9,                                *
  *                        changed only dreadnaut.c and nautinv.c              *
  *       24-Feb-94 : changes for version 1.10:                                *
  *                   - added version SYS_AMIGAAZT, thanks to Carsten Saager   *
  *                     (making 1.9+)                                          *
  *       19-Apr-95 : - added prototype wrapper for C++,                       *
  *                     thanks to Daniel Huson                                 *
  *        5-Mar-96 : - added SYS_ALPHA32 version (32-bit setwords on Alpha)   *
  *       13-Jul-96 : changes for version 2.0:                                 *
  *                   - added dynamic allocation                               *
  *                   - ERRFILE must be defined                                *
  *                   - added FLIPELEM1 and FLIPELEMENT macros                 *
  *       13-Aug-96 : - added SWCHUNK? macros                                  *
  *                   - added TAKEBIT macro                                    *
  *       28-Nov-96 : - include sys/types.h if not ANSI (tentative!)           *
  *       24-Jan-97 : - and stdlib.h if ANSI                                   *
  *                   - removed use of cfree() from UNIX variants              *
  *       25-Jan-97 : - changed options.getcanon from boolean to int           *
  *                     Backwards compatibility is ok, as boolean and int      *
  *                     are the same.  Now getcanon=2 means to get the label   *
  *                     and not care about the group.  Sometimes faster.       *
  *        6-Feb-97 : - Put in #undef for FALSE and TRUE to cope with          *
  *                     compilers that illegally predefine them.               *
  *                   - declared nauty_null and nautil_null                    *
  *        2-Jul-98 : - declared ALLBITS                                       *
  *       21-Oct-98 : - allow WORDSIZE==64 using unsigned long long            *
  *                   - added BIGNAUTY option for really big graphs            *
  *       11-Dec-99 : - made bit, leftbit and bytecount static in each file    *
  *        9-Jan-00 : - declared nauty_check() and nautil_check()              *
  *       12-Feb-00 : - Used #error for compile-time checks                    *
  *                   - Added DYNREALLOC                                       *
  *        4-Mar-00 : - declared ALLMASK(n)                                    *
  *       27-May-00 : - declared CONDYNFREE                                    *
  *       28-May-00 : - declared nautil_freedyn()                              *
  *       16-Aug-00 : - added OLDNAUTY and changed canonical labelling         *
  *       16-Nov-00 : - function prototypes are now default and unavoidable    *
  *                   - removed UPROC, now assume all compilers know void      *
  *                   - removed nvector, now just int (as it always was)       *
  *                   - added extra parameter to targetcell()                  *
  *                   - removed old versions which were only to skip around    *
  *                     bugs that should have been long fixed:                 *
  *                     SYS_APOLLO and SYS_VAXBSD.                             *
  *                   - DEFAULTOPIONS now specifies no output                  *
  *                   - Removed obsolete SYS_MACLSC version                    *
  *       21-Apr-01 : - Added code to satisfy compilation into Magma.  This    *
  *                       is activated by defining NAUTY_IN_MAGMA above.       *
  *                   - The *_null routines no longer exist                    *
  *                   - Default maxinvarlevel is now 1.  (This has no effect   *
  *                        unless an invariant is specified.)                  *
  *                   - Now labelorg has a concrete declaration in nautil.c    *
  *                        and EXTDEFS is not needed                           *
  *        5-May-01 : - NILFUNCTION, NILSET, NILGRAPH now obsolete.  Use NULL. *
  *       11-Sep-01 : - setword is unsigned int in the event that UINT_MAX     *
  *                     is defined and indicates it is big enough              *
  *       17-Oct-01 : - major rewrite for 2.1.  SYS_* variables gone!          *
  *                     Some modernity assumed, eg size_t                      *
  *        8-Aug-02 : - removed MAKEEMPTY  (use EMPTYSET instead)              *
  *                   - deleted OLDNAUTY everywhere                            *
  *       27-Aug-02 : - converted to use autoconf.  Now the original of this   *
  *                     file is nauty-h.in. Run configure to make nauty.h.     *
  *       20-Dec-02 : - increased INFINITY                                     *
  *                     some reorganization to please Magma                    *
  *                   - declared nauty_freedyn()                               *
  *       17-Nov-03 : - renamed INFINITY to NAUTY_INFINITY                     *
  *       29-May-04 : - added definition of SETWORD_FORMAT                     *
  *       14-Sep-04 : - extended prototypes even to recursive functions        *
  *       16-Oct-04 : - added DEFAULTOPTIONS_GRAPH                             *
  *       24-Oct-04 : Starting 2.3                                             *
  *                   - remove register declarations as modern compilers       *
  *                     tend to find them a nuisance                           *
  *                   - Don't define the obsolete symbol INFINITY if it is     *
  *                     defined already                                        *
  *       17-Nov-04 : - make 6 counters in statsblk unsigned long              *
  *       17-Jan-04 : - add init() and cleanup() to dispatchvec                *
  *       12-Nov-05 : - Changed NAUTY_INFINITY to 2^30+2 in BIGNAUTY case      *
  *       22-Nov-06 : Starting 2.4                                             *
  *                   - removed usertcellproc from options                     *
  *                     changed bestcell to targetcell in dispatch vector      *
  *                     declare targetcell and maketargetcell                  *
  *       29-Nov-06 : - add extraoptions to optionblk                          *
  *                   - add declarations of extra_autom and extra_level        *
  *       10-Dec-06 : - BIGNAUTY is gone!  Now permutation=shortish=int.       *
  *                     NAUTY_INFINITY only depends on whether sizeof(int)=2.  *
  *       27-Jun-08 : - define nauty_counter and LONG_LONG_COUNTERS            *
  *       30-Jun-08 : - declare version 2.4                                    *
  *                                                                            *
  *    nauty.h.  Generated from nauty-h.in by configure.
  *                                                                            *
  *****************************************************************************/
  
  /*****************************************************************************
  *                                                                            *
  *   16-bit, 32-bit and 64-bit versions can be selected by defining WORDSIZE. *
  *   The largest graph that can be handled has MAXN vertices.                 *
  *   Both WORDSIZE and MAXN can be defined on the command line.               *
  *   WORDSIZE must be 16, 32 or 64; MAXN must be <= NAUTY_INFINITY-2;         *
  *                                                                            *
  *   With a very slight loss of efficiency (depending on platform), nauty     *
  *   can be compiled to dynamically allocate arrays.  Predefine MAXN=0 to     *
  *   achieve this effect, which is default behaviour from version 2.0.        *
  *   In that case, graphs of size up to NAUTY_INFINITY-2 can be handled       *
  *   if the the memory is available.                                          *
  *                                                                            *
  *   If only very small graphs need to be processed, use MAXN<=WORDSIZE       *
  *   since this causes substantial code optimizations.                        *
  *                                                                            *
  *   Conventions and Assumptions:                                             *
  *                                                                            *
  *    A 'setword' is the chunk of memory that is occupied by one part of      *
  *    a set.  This is assumed to be >= WORDSIZE bits in size.                 *
  *                                                                            *
  *    The rightmost (loworder) WORDSIZE bits of setwords are numbered         *
  *    0..WORDSIZE-1, left to right.  It is necessary that the 2^WORDSIZE      *
  *    setwords with the other bits zero are totally ordered under <,=,>.      *
  *    This needs care on a 1's-complement machine.                            *
  *                                                                            *
  *    The int variables m and n have consistent meanings throughout.          *
  *    Graphs have n vertices always, and sets have m setwords always.         *
  *                                                                            *
  *    A 'set' consists of m contiguous setwords, whose bits are numbered      *
  *    0,1,2,... from left (high-order) to right (low-order), using only       *
  *    the rightmost WORDSIZE bits of each setword.  It is used to             *
  *    represent a subset of {0,1,...,n-1} in the usual way - bit number x     *
  *    is 1 iff x is in the subset.  Bits numbered n or greater, and           *
  *    unnumbered bits, are assumed permanently zero.                          *
  *                                                                            *
  *    A 'graph' consists of n contiguous sets.  The i-th set represents       *
  *    the vertices adjacent to vertex i, for i = 0,1,...,n-1.                 *
  *                                                                            *
  *    A 'permutation' is an array of n ints repesenting a permutation of      *
  *    the set {0,1,...,n-1}.  The value of the i-th entry is the number to    *
  *    which i is mapped.                                                      *
  *                                                                            *
  *    If g is a graph and p is a permutation, then g^p is the graph in        *
  *    which vertex i is adjacent to vertex j iff vertex p[i] is adjacent      *
  *    to vertex p[j] in g.                                                    *
  *                                                                            *
  *    A partition nest is represented by a pair (lab,ptn), where lab and ptn  *
  *    are int arrays.  The "partition at level x" is the partition whose      *
  *    cells are {lab[i],lab[i+1],...,lab[j]}, where [i,j] is a maximal        *
  *    subinterval of [0,n-1] such that ptn[k] > x for i <= k < j and          *
  *    ptn[j] <= x.  The partition at level 0 is given to nauty by the user.   *
  *    This is  refined for the root of the tree, which has level 1.           *
  *                                                                            *
  *****************************************************************************/
  
  #define NAUTYVERSIONID 2400   /* 1000 times the version number */
  #define NAUTYREQUIRED 2400    /* Minimum compatible version */
  
  #ifndef NAUTY_IN_MAGMA
  #if HAVE_SYSTYPES_H
  #include <sys/types.h>
  #endif
  #if HAVE_UNISTD_H
  #include <unistd.h>
  #endif
  #if HAVE_STDDEF_H
  #include <stddef.h>
  #endif
  #if HAVE_STDLIB_H
  #include <stdlib.h>
  #endif
  #if HAVE_STRING_H
  #include <string.h>
  #else
  #include <strings.h>
  #endif
  #endif
  
  /* WORDSIZE is the number of set elements per setword (16, 32 or 64).
     Starting at version 2.2, WORDSIZE and setword are defined as follows:
     If WORDSIZE is so far undefined, use 32 unless longs have more 
        than 32 bits, in which case use 64.
     Define setword thus:
        WORDSIZE==16 : unsigned short
        WORDSIZE==32 : unsigned int unless it is too small,
  			in which case unsigned long
        WORDSIZE==64 : the first of unsigned int, unsigned long,
                        unsigned long long, which is large enough.
  */
  
  #ifdef NAUTY_IN_MAGMA
  #undef WORDSIZE
  #define WORDSIZE WORDBITS
  #endif
  
  #ifdef WORDSIZE
  
  #if  (WORDSIZE != 16) && (WORDSIZE != 32) && (WORDSIZE != 64)
   #error "WORDSIZE must be 16, 32 or 64"
  #endif
  
  #else  /* WORDSIZE undefined */
  
  #if SIZEOF_LONG>4
  #define WORDSIZE 64
  #else
  #define WORDSIZE 32
  #endif
  
  #endif  /* WORDSIZE */
  
  #ifdef NAUTY_IN_MAGMA
  typedef t_uint setword;
  #define SETWORD_INT  /* Don't assume this is correct in Magma. */
  
  #else /* NAUTY_IN_MAGMA */
  
  #if WORDSIZE==16
  typedef unsigned short setword;
  #define SETWORD_SHORT
  #endif
  
  #if WORDSIZE==32
  #if SIZEOF_INT>=4
  typedef unsigned int setword;
  #define SETWORD_INT
  #else
  typedef unsigned long setword;
  #define SETWORD_LONG
  #endif
  #endif
  
  #if WORDSIZE==64
  #if SIZEOF_INT>=8
  typedef unsigned int setword;
  #define SETWORD_INT
  #else
  #if SIZEOF_LONG>=8
  typedef unsigned long setword;
  #define SETWORD_LONG
  #else
  typedef unsigned long long setword;
  #define SETWORD_LONGLONG
  #endif
  #endif
  #endif
  
  #endif /* NAUTY_IN_MAGMA else */
  
  #if SIZEOF_LONG_LONG>=8 && SIZEOF_LONG==4
  typedef unsigned long long nauty_counter;
  #define LONG_LONG_COUNTERS 1
  #else
  typedef unsigned long nauty_counter;
  #define LONG_LONG_COUNTERS 0
  #endif
  
  #if WORDSIZE==16
  #define NAUTYVERSION "2.4 (16 bits)"
  #endif
  #if WORDSIZE==32
  #define NAUTYVERSION "2.4 (32 bits)"
  #endif
  #if WORDSIZE==64
  #define NAUTYVERSION "2.4 (64 bits)"
  #endif
  
  #ifndef  MAXN  /* maximum allowed n value; use 0 for dynamic sizing. */
  #define MAXN 0
  #define MAXM 0
  #else
  #define MAXM ((MAXN+WORDSIZE-1)/WORDSIZE)  /* max setwords in a set */
  #endif  /* MAXN */
  
  /* Starting at version 2.2, set operations work for all set sizes unless
     ONE_WORD_SETS is defined.  In the latter case, if MAXM=1, set ops
     work only for single-setword sets.  In any case, macro versions
     ending with 1 work for single-setword sets and versions ending with
     0 work for all set sizes.
  */
  
  #if  WORDSIZE==16
  #define SETWD(pos) ((pos)>>4)  /* number of setword containing bit pos */
  #define SETBT(pos) ((pos)&0xF) /* position within setword of bit pos */
  #define TIMESWORDSIZE(w) ((w)<<4)
  #endif
  
  #if  WORDSIZE==32
  #define SETWD(pos) ((pos)>>5)
  #define SETBT(pos) ((pos)&0x1F)
  #define TIMESWORDSIZE(w) ((w)<<5)
  #endif
  
  #if  WORDSIZE==64
  #define SETWD(pos) ((pos)>>6)
  #define SETBT(pos) ((pos)&0x3F)
  #define TIMESWORDSIZE(w) ((w)<<6)    /* w*WORDSIZE */
  #endif
  
  #ifdef NAUTY_IN_MAGMA
  #define BITT bs_bit
  #else
  #define BITT bit
  #endif
  
  #define ADDELEMENT1(setadd,pos)  (*(setadd) |= BITT[pos])
  #define DELELEMENT1(setadd,pos)  (*(setadd) &= ~BITT[pos])
  #define FLIPELEMENT1(setadd,pos) (*(setadd) ^= BITT[pos])
  #define ISELEMENT1(setadd,pos)   ((*(setadd) & BITT[pos]) != 0)
  #define EMPTYSET1(setadd,m)   *(setadd) = 0;
  #define GRAPHROW1(g,v,m) ((set*)(g) + (v))
  
  #define ADDELEMENT0(setadd,pos)  ((setadd)[SETWD(pos)] |= BITT[SETBT(pos)])
  #define DELELEMENT0(setadd,pos)  ((setadd)[SETWD(pos)] &= ~BITT[SETBT(pos)])
  #define FLIPELEMENT0(setadd,pos) ((setadd)[SETWD(pos)] ^= BITT[SETBT(pos)])
  #define ISELEMENT0(setadd,pos) (((setadd)[SETWD(pos)] & BITT[SETBT(pos)]) != 0)
  #define EMPTYSET0(setadd,m) \
      {setword *es; \
      for (es = (setword*)(setadd)+(m); --es >= (setword*)(setadd);) *es=0;}
  #define GRAPHROW0(g,v,m) ((set*)(g) + (long)(v)*(long)(m))
  
  #if  (MAXM==1) && defined(ONE_WORD_SETS)
  #define ADDELEMENT ADDELEMENT1
  #define DELELEMENT DELELEMENT1
  #define FLIPELEMENT FLIPELEMENT1
  #define ISELEMENT ISELEMENT1
  #define EMPTYSET EMPTYSET1
  #define GRAPHROW GRAPHROW1
  #else
  #define ADDELEMENT ADDELEMENT0
  #define DELELEMENT DELELEMENT0
  #define FLIPELEMENT FLIPELEMENT0
  #define ISELEMENT ISELEMENT0
  #define EMPTYSET EMPTYSET0
  #define GRAPHROW GRAPHROW0
  #endif
  
  #ifdef NAUTY_IN_MAGMA
  #undef EMPTYSET
  #define EMPTYSET(setadd,m) {t_int _i; bsp_makeempty(setadd,m,_i);}
  #endif
  
  #define NOTSUBSET(word1,word2) ((word1) & ~(word2))  /* test if the 1-bits
                      in setword word1 do not form a subset of those in word2  */
  #define INTERSECT(word1,word2) ((word1) &= (word2))  /* AND word2 into word1 */
  #define UNION(word1,word2)     ((word1) |= (word2))  /* OR word2 into word1 */
  #define SETDIFF(word1,word2)   ((word1) &= ~(word2)) /* - word2 into word1 */
  #define XOR(word1,word2)       ((word1) ^= (word2))  /* XOR word2 into word1 */
  #define ZAPBIT(word,x) ((word) &= ~BITT[x])  /* delete bit x in setword */
  #define TAKEBIT(iw,w) {iw = FIRSTBIT(w); w ^= BITT[iw];}
  
  #ifdef SETWORD_LONGLONG
  #define MSK3232 0xFFFFFFFF00000000ULL
  #define MSK1648 0xFFFF000000000000ULL
  #define MSK0856 0xFF00000000000000ULL
  #define MSK1632 0x0000FFFF00000000ULL
  #define MSK0840     0xFF0000000000ULL
  #define MSK1616         0xFFFF0000ULL 
  #define MSK0824         0xFF000000ULL 
  #define MSK0808             0xFF00ULL 
  #define MSK63C  0x7FFFFFFFFFFFFFFFULL
  #define MSK31C          0x7FFFFFFFULL
  #define MSK15C              0x7FFFULL
  #define MSK64   0xFFFFFFFFFFFFFFFFULL
  #define MSK32           0xFFFFFFFFULL
  #define MSK16               0xFFFFULL
  #endif
  
  #ifdef SETWORD_LONG
  #define MSK3232 0xFFFFFFFF00000000UL
  #define MSK1648 0xFFFF000000000000UL
  #define MSK0856 0xFF00000000000000UL
  #define MSK1632 0x0000FFFF00000000UL
  #define MSK0840     0xFF0000000000UL
  #define MSK1616         0xFFFF0000UL 
  #define MSK0824         0xFF000000UL 
  #define MSK0808             0xFF00UL 
  #define MSK63C  0x7FFFFFFFFFFFFFFFUL
  #define MSK31C          0x7FFFFFFFUL
  #define MSK15C              0x7FFFUL
  #define MSK64   0xFFFFFFFFFFFFFFFFUL
  #define MSK32           0xFFFFFFFFUL
  #define MSK16               0xFFFFUL
  #endif
  
  #if defined(SETWORD_INT) || defined(SETWORD_SHORT)
  #define MSK3232 0xFFFFFFFF00000000U
  #define MSK1648 0xFFFF000000000000U
  #define MSK0856 0xFF00000000000000U
  #define MSK1632 0x0000FFFF00000000U
  #define MSK0840     0xFF0000000000U
  #define MSK1616         0xFFFF0000U 
  #define MSK0824         0xFF000000U
  #define MSK0808             0xFF00U 
  #define MSK63C  0x7FFFFFFFFFFFFFFFU
  #define MSK31C          0x7FFFFFFFU
  #define MSK15C              0x7FFFU
  #define MSK64   0xFFFFFFFFFFFFFFFFU
  #define MSK32           0xFFFFFFFFU
  #define MSK16               0xFFFFU
  #endif
  
  #if defined(SETWORD_LONGLONG)
  #if WORDSIZE==16
  #define SETWORD_FORMAT "%04llx"
  #endif
  #if WORDSIZE==32
  #define SETWORD_FORMAT "%08llx"
  #endif
  #if WORDSIZE==64
  #define SETWORD_FORMAT "%16llx"
  #endif
  #endif
  
  #if defined(SETWORD_LONG)
  #if WORDSIZE==16
  #define SETWORD_FORMAT "%04lx"
  #endif
  #if WORDSIZE==32
  #define SETWORD_FORMAT "%08lx"
  #endif
  #if WORDSIZE==64
  #define SETWORD_FORMAT "%16lx"
  #endif
  #endif
  
  #if defined(SETWORD_INT)
  #if WORDSIZE==16
  #define SETWORD_FORMAT "%04x"
  #endif
  #if WORDSIZE==32
  #define SETWORD_FORMAT "%08x"
  #endif
  #if WORDSIZE==64
  #define SETWORD_FORMAT "%16x"
  #endif
  #endif
  
  #if defined(SETWORD_SHORT)
  #if WORDSIZE==16
  #define SETWORD_FORMAT "%04hx"
  #endif
  #if WORDSIZE==32
  #define SETWORD_FORMAT "%08hx"
  #endif
  #if WORDSIZE==64
  #define SETWORD_FORMAT "%16hx"
  #endif
  #endif
  
  /* POPCOUNT(x) = number of 1-bits in a setword x
     FIRSTBIT(x) = number of first 1-bit in non-zero setword (0..WORDSIZE-1)
     BITMASK(x)  = setword whose rightmost WORDSIZE-x-1 (numbered) bits
                   are 1 and the rest 0 (0 <= x < WORDSIZE)
                   (I.e., bits 0..x are unselected and the rest selected.)
     ALLBITS     = all (numbered) bits in a setword  */
  
  #if  WORDSIZE==64
  #define POPCOUNT(x) (bytecount[(x)>>56 & 0xFF] + bytecount[(x)>>48 & 0xFF] \
                     + bytecount[(x)>>40 & 0xFF] + bytecount[(x)>>32 & 0xFF] \
                     + bytecount[(x)>>24 & 0xFF] + bytecount[(x)>>16 & 0xFF] \
                     + bytecount[(x)>>8 & 0xFF]  + bytecount[(x) & 0xFF])
  #define FIRSTBIT(x) ((x) & MSK3232 ? \
                         (x) &   MSK1648 ? \
                           (x) & MSK0856 ? \
                           0+leftbit[((x)>>56) & 0xFF] : \
                           8+leftbit[(x)>>48] \
                         : (x) & MSK0840 ? \
                           16+leftbit[(x)>>40] : \
                           24+leftbit[(x)>>32] \
                       : (x) & MSK1616 ? \
                           (x) & MSK0824 ? \
                           32+leftbit[(x)>>24] : \
                           40+leftbit[(x)>>16] \
                         : (x) & MSK0808 ? \
                           48+leftbit[(x)>>8] : \
                           56+leftbit[x])
  #define BITMASK(x)  (MSK63C >> (x))
  #define ALLBITS  MSK64
  #define SWCHUNK0(w) ((long)((w)>>48)&0xFFFFL)
  #define SWCHUNK1(w) ((long)((w)>>32)&0xFFFFL)
  #define SWCHUNK2(w) ((long)((w)>>16)&0xFFFFL)
  #define SWCHUNK3(w) ((long)(w)&0xFFFFL)
  #endif
  
  #if  WORDSIZE==32
  #define POPCOUNT(x) (bytecount[(x)>>24 & 0xFF] + bytecount[(x)>>16 & 0xFF] \
                          + bytecount[(x)>>8 & 0xFF] + bytecount[(x) & 0xFF])
  #define FIRSTBIT(x) ((x) & MSK1616 ? ((x) & MSK0824 ? \
                       leftbit[((x)>>24) & 0xFF] : 8+leftbit[(x)>>16]) \
                      : ((x) & MSK0808 ? 16+leftbit[(x)>>8] : 24+leftbit[x]))
  #define BITMASK(x)  (MSK31C >> (x))
  #define ALLBITS  MSK32
  #define SWCHUNK0(w) ((long)((w)>>16)&0xFFFFL)
  #define SWCHUNK1(w) ((long)(w)&0xFFFFL)
  #endif
  
  #if  WORDSIZE==16
  #define POPCOUNT(x) (bytecount[(x)>>8 & 0xFF] + bytecount[(x) & 0xFF])
  #define FIRSTBIT(x) ((x) & MSK0808 ? leftbit[((x)>>8) & 0xFF] : 8+leftbit[x])
  #define BITMASK(x)  (MSK15C >> (x))
  #define ALLBITS  MSK16
  #define SWCHUNK0(w) ((long)(w)&0xFFFFL)
  #endif
  
  #ifdef  SYS_CRAY
  #undef POPCOUNT
  #undef FIRSTBIT
  #undef BITMASK
  #define POPCOUNT(x) _popcnt(x)
  #define FIRSTBIT(x) _leadz(x)
  #define BITMASK(x)  _mask(65+(x))
  #endif
  
  #ifdef NAUTY_IN_MAGMA
  #undef POPCOUNT
  #undef FIRSTBIT
  #undef BITMASK
  #define POPCOUNT(x) bs_popcount(x)
  #define FIRSTBIT(x) bs_firstbit(x)
  #define BITMASK(x)  bs_bitmask(x)
  #endif
  
  #define ALLMASK(n) ((n)?~BITMASK((n)-1):(setword)0)  /* First n bits */
  
      /* various constants: */
  #undef FALSE
  #undef TRUE
  #define FALSE    0
  #define TRUE     1
  
  #if SIZEOF_INT>=4
  #define NAUTY_INFINITY 0x40000002
  #else
  #define NAUTY_INFINITY 0x7FFF
  #endif
  
  typedef int shortish;
  
  /* For backward compatibility: */
  #if !HAS_MATH_INF && !defined(INFINITY)
  #define INFINITY NAUTY_INFINITY
  #endif
  
  #if MAXN > NAUTY_INFINITY-2
   #error MAXN must be at most NAUTY_INFINITY-2
  #endif
  
      /* typedefs for sets, graphs, permutations, etc.: */
  
  typedef int boolean;    /* boolean MUST be the same as int */
  
  #define UPROC void      /* obsolete */
  
  typedef setword set,graph;
  typedef int nvector,np2vector;   /* obsolete */
  typedef shortish permutation;
  #ifdef NAUTY_IN_MAGMA
  typedef graph nauty_graph;
  typedef set nauty_set;
  #endif
  
  typedef struct
  {
      double grpsize1;        /* size of group is */
      int grpsize2;           /*    grpsize1 * 10^grpsize2 */
  #define groupsize1 grpsize1     /* for backwards compatibility */
  #define groupsize2 grpsize2
      int numorbits;          /* number of orbits in group */
      int numgenerators;      /* number of generators found */
      int errstatus;          /* if non-zero : an error code */
  #define outofspace errstatus;   /* for backwards compatibility */
      unsigned long numnodes;      /* total number of nodes */
      unsigned long numbadleaves;  /* number of leaves of no use */
      int maxlevel;                /* maximum depth of search */
      unsigned long tctotal;       /* total size of all target cells */
      unsigned long canupdates;    /* number of updates of best label */
      unsigned long invapplics;    /* number of applications of invarproc */
      unsigned long invsuccesses;  /* number of successful uses of invarproc() */
      int invarsuclevel;      /* least level where invarproc worked */
  } statsblk;
  
  /* codes for errstatus field (see nauty.c for more accurate descriptions): */
  #define NTOOBIG      1      /* n > MAXN or n > WORDSIZE*m */
  #define MTOOBIG      2      /* m > MAXM */
  #define CANONGNIL    3      /* canong = NULL, but getcanon = TRUE */
  
  /* manipulation of real approximation to group size */
  #define MULTIPLY(s1,s2,i) if ((s1 *= i) >= 1e10) {s1 /= 1e10; s2 += 10;}
  
  struct optionstruct;  /* incomplete definition */
  
  typedef struct
  {
      boolean (*isautom)        /* test for automorphism */
              (graph*,permutation*,boolean,int,int);
      int     (*testcanlab)     /* test for better labelling */
              (graph*,graph*,int*,int*,int,int);
      void    (*updatecan)      /* update canonical object */
              (graph*,graph*,permutation*,int,int,int);
      void    (*refine)         /* refine partition */
              (graph*,int*,int*,int,int*,permutation*,set*,int*,int,int);
      void    (*refine1)        /* refine partition, MAXM==1 */
              (graph*,int*,int*,int,int*,permutation*,set*,int*,int,int);
      boolean (*cheapautom)     /* test for easy automorphism */
              (int*,int,boolean,int);
      int     (*targetcell)     /* decide which cell to split */
              (graph*,int*,int*,int,int,boolean,int,int,int);
      void    (*freedyn)(void); /* free dynamic memory */
      void    (*check)          /* check compilation parameters */
              (int,int,int,int);
      void    (*init)(graph*,graph**,graph*,graph**,int*,int*,set*,
                     struct optionstruct*,int*,int,int);
      void    (*cleanup)(graph*,graph**,graph*,graph**,int*,int*,
                        struct optionstruct*,statsblk*,int,int);
  } dispatchvec;
  
  typedef struct optionstruct
  {
      int getcanon;             /* make canong and canonlab? */
  #define LABELONLY 2   /* new value UNIMPLEMENTED */
      boolean digraph;          /* multiple edges or loops? */
      boolean writeautoms;      /* write automorphisms? */
      boolean writemarkers;     /* write stats on pts fixed, etc.? */
      boolean defaultptn;       /* set lab,ptn,active for single cell? */
      boolean cartesian;        /* use cartesian rep for writing automs? */
      int linelength;           /* max chars/line (excl. '\n') for output */
      FILE *outfile;            /* file for output, if any */
      void (*userrefproc)       /* replacement for usual refine procedure */
           (graph*,int*,int*,int,int*,permutation*,set*,int*,int,int);
      void (*userautomproc)     /* procedure called for each automorphism */
           (int,permutation*,int*,int,int,int);
      void (*userlevelproc)     /* procedure called for each level */
           (int*,int*,int,int*,statsblk*,int,int,int,int,int,int);
      void (*usernodeproc)      /* procedure called for each node */
           (graph*,int*,int*,int,int,int,int,int,int);
      void (*invarproc)         /* procedure to compute vertex-invariant */
           (graph*,int*,int*,int,int,int,permutation*,int,boolean,int,int);
      int tc_level;             /* max level for smart target cell choosing */
      int mininvarlevel;        /* min level for invariant computation */
      int maxinvarlevel;        /* max level for invariant computation */
      int invararg;             /* value passed to (*invarproc)() */
      dispatchvec *dispatch;    /* vector of object-specific routines */
      void *extra_options;      /* arbitrary extra options */
  #ifdef NAUTY_IN_MAGMA
      boolean print_stats;      /* CAYLEY specfic - GYM Sep 1990 */
      char *invarprocname;      /* Magma - no longer global sjc 1994 */
      int lab_h;                /* Magma - no longer global sjc 1994 */
      int ptn_h;                /* Magma - no longer global sjc 1994 */
      int orbitset_h;           /* Magma - no longer global sjc 1994 */
  #endif
  } optionblk;
  
  #ifndef CONSOLWIDTH
  #define CONSOLWIDTH 78
  #endif
  
  /* The following are obsolete.  Just use NULL. */
  #define NILFUNCTION ((void(*)())NULL)      /* nil pointer to user-function */
  #define NILSET      ((set*)NULL)           /* nil pointer to set */
  #define NILGRAPH    ((graph*)NULL)         /* nil pointer to graph */
  
  #define DEFAULTOPTIONS_GRAPH(options) optionblk options = \
   {0,FALSE,FALSE,FALSE,TRUE,FALSE,CONSOLWIDTH, \
    NULL,NULL,NULL,NULL,NULL,NULL,100,0,1,0,&dispatch_graph,NULL}
  
  #ifndef DEFAULTOPTIONS
  #define DEFAULTOPTIONS DEFAULTOPTIONS_GRAPH
  #endif
  
  #ifdef NAUTY_IN_MAGMA
  #define PUTC(c,f) io_putchar(c)
  #else
  #ifdef IS_JAVA
  extern void javastream(FILE* f,char c);
  #define PUTC(c,f) javastream(f,c)
  #else
  #define PUTC(c,f) putc(c,f)
  #endif
  #endif
  
  /* We hope that malloc, free, realloc are declared either in <stdlib.h>
     or <malloc.h>.  Otherwise we will define them.  We also assume that
     size_t has been defined by the time we get to define malloc(). */
  #ifndef NAUTY_IN_MAGMA
  #if MALLOC_DEC==2
  #include <malloc.h>
  #endif
  #if MALLOC_DEC==0
  extern void *malloc(size_t);
  extern void *realloc(void*,size_t);
  extern void free(void*);
  #endif
  #endif
  
  /* ALLOCS(x,y) should return a pointer (any pointer type) to x*y units of new
     storage, not necessarily initialised.  A "unit" of storage is defined by
     the sizeof operator.   x and y are integer values of type int or larger, 
     but x*y may well be too large for an int.  The macro should cast to the
     correct type for the call.  On failure, ALLOCS(x,y) should return a NULL 
     pointer.  FREES(p) should free storage previously allocated by ALLOCS, 
     where p is the value that ALLOCS returned. */
  
  #ifdef NAUTY_IN_MAGMA
  #define ALLOCS(x,y) mem_malloc((size_t)(x)*(size_t)(y))
  #define REALLOCS(p,x) mem_realloc(p,(size_t)(x))
  #define FREES(p) mem_free(p)
  #else
  #define ALLOCS(x,y) malloc((size_t)(x)*(size_t)(y))
  #define REALLOCS(p,x) realloc(p,(size_t)(x)) 
  #define FREES(p) free(p)
  #endif
  
  /* The following macros are used by nauty if MAXN=0.  They dynamically
     allocate arrays of size dependent on m or n.  For each array there
     should be two static variables:
       type *name;
       size_t name_sz;
     "name" will hold a pointer to an allocated array.  "name_sz" will hold
     the size of the allocated array in units of sizeof(type).  DYNALLSTAT
     declares both variables and initialises name_sz=0.  DYNALLOC1 and
     DYNALLOC2 test if there is enough space allocated, and if not free
     the existing space and allocate a bigger space.  The allocated space
     is not initialised.
     
     In the case of DYNALLOC1, the space is allocated using
         ALLOCS(sz,sizeof(type)).
     In the case of DYNALLOC2, the space is allocated using
         ALLOCS(sz1,sz2*sizeof(type)).
  
     DYNREALLOC is like DYNALLOC1 except that the old contents are copied
     into the new space.  realloc() is assumed.  This is not currently
     used by nauty or dreadnaut.
  
     DYNFREE frees any allocated array and sets name_sz back to 0.
     CONDYNFREE does the same, but only if name_sz exceeds some limit.
  */
  
  #define DYNALLSTAT(type,name,name_sz) \
  	static type *name; static size_t name_sz=0
  #define DYNALLOC1(type,name,name_sz,sz,msg) \
   if ((size_t)(sz) > name_sz) \
   { if (name_sz) FREES(name); name_sz = (sz); \
   if ((name=(type*)ALLOCS(sz,sizeof(type))) == NULL) {alloc_error((char *)msg);}}
  #define DYNALLOC2(type,name,name_sz,sz1,sz2,msg) \
   if ((size_t)(sz1)*(size_t)(sz2) > name_sz) \
   { if (name_sz) FREES(name); name_sz = (size_t)(sz1)*(size_t)(sz2); \
   if ((name=(type*)ALLOCS((sz1),(sz2)*sizeof(type))) == NULL) \
   {alloc_error((char *)msg);}}
  #define DYNREALLOC(type,name,name_sz,sz,msg) \
   {if ((size_t)(sz) > name_sz) \
   { if ((name = (type*)REALLOCS(name,(sz)*sizeof(type))) == NULL) \
        {alloc_error((char *)msg);} else name_sz = (sz);}}
  #define DYNFREE(name,name_sz) if (name_sz) {FREES(name); name_sz = 0;}
  #define CONDYNFREE(name,name_sz,minsz) \
   if (name_sz > (size_t)(minsz)) {FREES(name); name_sz = 0;}
  
  /* File to write error messages to (used as first argument to fprintf()). */
  #define ERRFILE stderr
  
  /* Don't use OLDEXTDEFS, it is only still here for Magma. */
  #ifdef OLDEXTDEFS   
  #define EXTDEF_CLASS
  #ifdef EXTDEFS
  #define EXTDEF_TYPE 1
  #else
  #define EXTDEF_TYPE 2
  #endif
  #else
  #define EXTDEF_CLASS static
  #define EXTDEF_TYPE 2
  #endif
  
  extern int labelorg;   /* Declared in nautil.c */
  
  #ifndef NAUTY_IN_MAGMA
    /* Things equivalent to bit, bytecount, leftbit are defined
       in bs.h for Magma. */
  #if  EXTDEF_TYPE==1
  extern setword bit[];
  extern int bytecount[];
  extern int leftbit[];
  
  #else
      /* array giving setwords with single 1-bit */
  #if  WORDSIZE==64
  #ifdef SETWORD_LONGLONG
  EXTDEF_CLASS
  setword bit[] = {01000000000000000000000LL,0400000000000000000000LL,
                   0200000000000000000000LL,0100000000000000000000LL,
                   040000000000000000000LL,020000000000000000000LL,
                   010000000000000000000LL,04000000000000000000LL,
                   02000000000000000000LL,01000000000000000000LL,
                   0400000000000000000LL,0200000000000000000LL,
                   0100000000000000000LL,040000000000000000LL,
                   020000000000000000LL,010000000000000000LL,
                   04000000000000000LL,02000000000000000LL,
                   01000000000000000LL,0400000000000000LL,0200000000000000LL,
                   0100000000000000LL,040000000000000LL,020000000000000LL,
                   010000000000000LL,04000000000000LL,02000000000000LL,
                   01000000000000LL,0400000000000LL,0200000000000LL,
  		 0100000000000LL,040000000000LL,020000000000LL,010000000000LL,
  		 04000000000LL,02000000000LL,01000000000LL,0400000000LL,
  		 0200000000LL,0100000000LL,040000000LL,020000000LL,
  		 010000000LL,04000000LL,02000000LL,01000000LL,0400000LL,
  		 0200000LL,0100000LL,040000LL,020000LL,010000LL,04000LL,
                   02000LL,01000LL,0400LL,0200LL,0100LL,040LL,020LL,010LL,
  		 04LL,02LL,01LL};
  #else
  EXTDEF_CLASS
  setword bit[] = {01000000000000000000000,0400000000000000000000,
                   0200000000000000000000,0100000000000000000000,
                   040000000000000000000,020000000000000000000,
                   010000000000000000000,04000000000000000000,
                   02000000000000000000,01000000000000000000,
                   0400000000000000000,0200000000000000000,
                   0100000000000000000,040000000000000000,020000000000000000,
                   010000000000000000,04000000000000000,02000000000000000,
                   01000000000000000,0400000000000000,0200000000000000,
                   0100000000000000,040000000000000,020000000000000,
                   010000000000000,04000000000000,02000000000000,
                   01000000000000,0400000000000,0200000000000,0100000000000,
                   040000000000,020000000000,010000000000,04000000000,
                   02000000000,01000000000,0400000000,0200000000,0100000000,
                   040000000,020000000,010000000,04000000,02000000,01000000,
                   0400000,0200000,0100000,040000,020000,010000,04000,
                   02000,01000,0400,0200,0100,040,020,010,04,02,01};
  #endif
  #endif
  
  #if  WORDSIZE==32
  EXTDEF_CLASS
  setword bit[] = {020000000000,010000000000,04000000000,02000000000,
                   01000000000,0400000000,0200000000,0100000000,040000000,
                   020000000,010000000,04000000,02000000,01000000,0400000,
                   0200000,0100000,040000,020000,010000,04000,02000,01000,
                   0400,0200,0100,040,020,010,04,02,01};
  #endif
  
  #if WORDSIZE==16
  EXTDEF_CLASS
  setword bit[] = {0100000,040000,020000,010000,04000,02000,01000,0400,0200,
                   0100,040,020,010,04,02,01};
  #endif
  
      /*  array giving number of 1-bits in bytes valued 0..255: */
  EXTDEF_CLASS
  int bytecount[] = {0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
                     1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
                     1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
                     2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
                     1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
                     2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
                     2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
                     3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
                     1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
                     2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
                     2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
                     3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
                     2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
                     3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
                     3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
                     4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8};
  
      /* array giving position (1..7) of high-order 1-bit in byte: */
  EXTDEF_CLASS
  int leftbit[] =   {8,7,6,6,5,5,5,5,4,4,4,4,4,4,4,4,
                     3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
                     2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
                     2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
                     1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
                     1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
                     1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
                     1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
                     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
  #endif  /* EXTDEFS */
  
  #endif /* not NAUTY_IN_MAGMA */
  
  #define ANSIPROT 1
  #define EXTPROC(func,args) extern func args;     /* obsolete */
  
  /* The following is for C++ programs that read nauty.h.  Compile nauty
     itself using C, not C++.  */
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  extern void alloc_error(char*);
  extern void breakout(int*,int*,int,int,int,set*,int);
  extern boolean cheapautom(int*,int,boolean,int);
  extern void doref(graph*,int*,int*,int,int*,int*,permutation*,set*,int*,
    void(*)(graph*,int*,int*,int,int*,permutation*,set*,int*,int,int),
    void(*)(graph*,int*,int*,int,int,int,permutation*,int,boolean,int,int),
    int,int,int,boolean,int,int);
  extern void extra_autom(permutation*,int);
  extern void extra_level(int,int*,int*,int,int,int,int,int,int);
  extern boolean isautom(graph*,permutation*,boolean,int,int);
  extern dispatchvec dispatch_graph;
  extern int itos(int,char*);
  extern void fmperm(permutation*,set*,set*,int,int);
  extern void fmptn(int*,int*,int,set*,set*,int,int);
  extern void longprune(set*,set*,set*,set*,int);
  extern void nauty(graph*,int*,int*,set*,int*,optionblk*,
                    statsblk*,set*,int,int,int,graph*);
  extern void maketargetcell(graph*,int*,int*,int,set*,int*,int*,int,boolean,
             int,int (*)(graph*,int*,int*,int,int,boolean,int,int,int),int,int);
  extern int nextelement(set*,int,int);
  extern int orbjoin(int*,permutation*,int);
  extern void permset(set*,set*,int,permutation*);
  extern void putstring(FILE*,char*);
  extern void refine(graph*,int*,int*,int,int*,permutation*,set*,int*,int,int);
  extern void refine1(graph*,int*,int*,int,int*,permutation*,set*,int*,int,int);
  extern void shortprune(set*,set*,int);
  extern int targetcell(graph*,int*,int*,int,int,boolean,int,int,int);
  extern int testcanlab(graph*,graph*,int*,int*,int,int);
  extern void updatecan(graph*,graph*,permutation*,int,int,int);
  extern void writeperm(FILE*,permutation*,boolean,int,int);
  extern void nauty_freedyn(void);
  extern void nauty_check(int,int,int,int);
  extern void naugraph_check(int,int,int,int);
  extern void nautil_check(int,int,int,int);
  extern void nautil_freedyn(void);
  extern void naugraph_freedyn(void);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif  /* _NAUTY_H_ */
  