update ast

1 files changed, 0 insertions, 1838 deletions

diff --git a/ast/selectormap.c b/ast/selectormap.c
deleted file mode 100644
index 87a6f45..0000000
--- a/ast/selectormap.c
+++ /dev/null
@@ -1,1838 +0,0 @@
-/*
-*class++
-*  Name:
-*     SelectorMap
-
-*  Purpose:
-*     A Mapping that locates positions within one of a set of alternate
-*     Regions.
-
-*  Constructor Function:
-c     astSelectorMap
-f     AST_SELECTORMAP
-
-*  Description:
-*     A SelectorMap is a Mapping that identifies which Region contains
-*     a given input position.
-*
-*     A SelectorMap encapsulates a number of Regions that all have the same
-*     number of axes and represent the same coordinate Frame. The number of
-*     inputs (Nin attribute) of the SelectorMap equals the number of axes
-*     spanned by one of the encapsulated Region. All SelectorMaps have only
-*     a single output. SelectorMaps do not define an inverse transformation.
-*
-*     For each input position, the forward transformation of a SelectorMap
-*     searches through the encapsulated Regions (in the order supplied when
-*     the SelectorMap was created) until a Region is found which contains
-*     the input position. The index associated with this Region is
-*     returned as the SelectorMap output value (the index value is the
-*     position of the Region within the list of Regions supplied when the
-*     SelectorMap was created, starting at 1 for the first Region). If an
-*     input position is not contained within any Region, a value of zero is
-*     returned by the forward transformation.
-*
-*     If a compound Mapping contains a SelectorMap in series with its own
-*     inverse, the combination of the two adjacent SelectorMaps will be
-*     replaced by a UnitMap when the compound Mapping is simplified using
-c     astSimplify.
-f     AST_SIMPLIFY.
-*
-*     In practice, SelectorMaps are often used in conjunction with SwitchMaps.
-
-*  Inheritance:
-*     The SelectorMap class inherits from the Mapping class.
-
-*  Attributes:
-*     The SelectorMap class does not define any new attributes beyond those
-*     which are applicable to all Mappings.
-
-*  Functions:
-c     The SelectorMap class does not define any new functions beyond those
-f     The SelectorMap class does not define any new routines beyond those
-*     which are applicable to all Mappings.
-
-*  Copyright:
-*     Copyright (C) 1997-2006 Council for the Central Laboratory of the
-*     Research Councils
-
-*  Licence:
-*     This program is free software: you can redistribute it and/or
-*     modify it under the terms of the GNU Lesser General Public
-*     License as published by the Free Software Foundation, either
-*     version 3 of the License, or (at your option) any later
-*     version.
-*     
-*     This program is distributed in the hope that it will be useful,
-*     but WITHOUT ANY WARRANTY; without even the implied warranty of
-*     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-*     GNU Lesser General Public License for more details.
-*     
-*     You should have received a copy of the GNU Lesser General
-*     License along with this program.  If not, see
-*     <http://www.gnu.org/licenses/>.
-
-*  Authors:
-*     DSB: David S. Berry (Starlink)
-
-*  History:
-*     15-MAR-2006 (DSB):
-*        Original version.
-*     18-MAY-2006 (DSB):
-*        - Change logic for detecting interior points in function Transform.
-*        - Added BADVAL to contructor argument list.
-*class--
-*/
-
-/* Module Macros. */
-/* ============== */
-/* Set the name of the class we are implementing. This indicates to
-   the header files that define class interfaces that they should make
-   "protected" symbols available. */
-#define astCLASS SelectorMap
-
-/* Include files. */
-/* ============== */
-/* Interface definitions. */
-/* ---------------------- */
-
-#include "globals.h"             /* Thread-safe global data access */
-#include "error.h"               /* Error reporting facilities */
-#include "memory.h"              /* Memory allocation facilities */
-#include "object.h"              /* Base Object class */
-#include "pointset.h"            /* Sets of points/coordinates */
-#include "mapping.h"             /* Coordinate Mappings (parent class) */
-#include "unitmap.h"             /* Unit Mappings */
-#include "channel.h"             /* I/O channels */
-#include "selectormap.h"         /* Interface definition for this class */
-
-/* Error code definitions. */
-/* ----------------------- */
-#include "ast_err.h"             /* AST error codes */
-
-/* C header files. */
-/* --------------- */
-#include <stdarg.h>
-#include <stddef.h>
-#include <string.h>
-#include <stdio.h>
-
-/* Module Variables. */
-/* ================= */
-
-/* Address of this static variable is used as a unique identifier for
-   member of this class. */
-static int class_check;
-
-/* Pointers to parent class methods which are extended by this class. */
-static int (* parent_getobjsize)( AstObject *, int * );
-static AstPointSet *(* parent_transform)( AstMapping *, AstPointSet *, int, AstPointSet *, int * );
-
-#if defined(THREAD_SAFE)
-static int (* parent_managelock)( AstObject *, int, int, AstObject **, int * );
-#endif
-
-
-#ifdef THREAD_SAFE
-/* Define how to initialise thread-specific globals. */
-#define GLOBAL_inits \
-   globals->Class_Init = 0;
-
-/* Create the function that initialises global data for this module. */
-astMAKE_INITGLOBALS(SelectorMap)
-
-/* Define macros for accessing each item of thread specific global data. */
-#define class_init astGLOBAL(SelectorMap,Class_Init)
-#define class_vtab astGLOBAL(SelectorMap,Class_Vtab)
-
-
-#include <pthread.h>
-
-
-#else
-
-
-/* Define the class virtual function table and its initialisation flag
-   as static variables. */
-static AstSelectorMapVtab class_vtab;   /* Virtual function table */
-static int class_init = 0;       /* Virtual function table initialised? */
-
-#endif
-
-/* External Interface Function Prototypes. */
-/* ======================================= */
-/* The following functions have public prototypes only (i.e. no
-   protected prototypes), so we must provide local prototypes for use
-   within this module. */
-AstSelectorMap *astSelectorMapId_( int, void **, double, const char *, ... );
-
-/* Prototypes for Private Member Functions. */
-/* ======================================== */
-static AstPointSet *Transform( AstMapping *, AstPointSet *, int, AstPointSet *, int * );
-static int Equal( AstObject *, AstObject *, int * );
-static int GetObjSize( AstObject *, int * );
-static int MapMerge( AstMapping *, int, int, int *, AstMapping ***, int **, int * );
-static void Copy( const AstObject *, AstObject *, int * );
-static void Delete( AstObject *, int * );
-static void Dump( AstObject *, AstChannel *, int * );
-
-#if defined(THREAD_SAFE)
-static int ManageLock( AstObject *, int, int, AstObject **, int * );
-#endif
-
-/* Member functions. */
-/* ================= */
-static int Equal( AstObject *this_object, AstObject *that_object, int *status ) {
-/*
-*  Name:
-*     Equal
-
-*  Purpose:
-*     Test if two SelectorMaps are equivalent.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "selectormap.h"
-*     int Equal( AstObject *this, AstObject *that, int *status )
-
-*  Class Membership:
-*     SelectorMap member function (over-rides the astEqual protected
-*     method inherited from the astMapping class).
-
-*  Description:
-*     This function returns a boolean result (0 or 1) to indicate whether
-*     two SelectorMaps are equivalent.
-
-*  Parameters:
-*     this
-*        Pointer to the first Object (a SelectorMap).
-*     that
-*        Pointer to the second Object.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     One if the SelectorMaps are equivalent, zero otherwise.
-
-*  Notes:
-*     - A value of zero will be returned if this function is invoked
-*     with the global status set, or if it should fail for any reason.
-*/
-
-/* Local Variables: */
-   AstSelectorMap *that;
-   AstSelectorMap *this;
-   int i;
-   int nin;
-   int nreg;
-   int result;
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain pointers to the two SelectorMap structures. */
-   this = (AstSelectorMap *) this_object;
-   that = (AstSelectorMap *) that_object;
-
-/* Check the second object is a SelectorMap. We know the first is a
-   SelectorMap since we have arrived at this implementation of the virtual
-   function. */
-   if( astIsASelectorMap( that ) ) {
-
-/* Check they have the same number of inputs. */
-      nin = astGetNin( this );
-      if( astGetNin( that ) == nin ) {
-
-/* Check they contain the same number of Regions, and have the same badval. */
-         nreg = this->nreg;
-         if( that->nreg == nreg ||
-             astEQUAL( that->badval, this->badval) ) {
-
-/* Loop over the Regions, breaking as soon as two unequal Regions are
-   found. */
-            result = 1;
-            for( i = 0; i < nreg; i++ ) {
-               if( !astEqual( this->reg[ i ], that->reg[ i ] ) ) {
-                  result = 0;
-                  break;
-               }
-            }
-         }
-      }
-   }
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = 0;
-
-/* Return the result, */
-   return result;
-}
-
-static int GetObjSize( AstObject *this_object, int *status ) {
-/*
-*  Name:
-*     GetObjSize
-
-*  Purpose:
-*     Return the in-memory size of an Object.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "selectormap.h"
-*     int GetObjSize( AstObject *this, int *status )
-
-*  Class Membership:
-*     SelectorMap member function (over-rides the astGetObjSize protected
-*     method inherited from the parent class).
-
-*  Description:
-*     This function returns the in-memory size of the supplied SelectorMap,
-*     in bytes.
-
-*  Parameters:
-*     this
-*        Pointer to the SelectorMap.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     The Object size, in bytes.
-
-*  Notes:
-*     - A value of zero will be returned if this function is invoked
-*     with the global status set, or if it should fail for any reason.
-*/
-
-/* Local Variables: */
-   AstSelectorMap *this;
-   int i;
-   int result;
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointers to the SelectorMap structure. */
-   this = (AstSelectorMap *) this_object;
-
-/* Invoke the GetObjSize method inherited from the parent class, and then
-   add on any components of the class structure defined by this class
-   which are stored in dynamically allocated memory. */
-   result = (*parent_getobjsize)( this_object, status );
-
-   for( i = 0; i < this->nreg; i++ ) {
-      result += astGetObjSize( this->reg[ i ] );
-   }
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = 0;
-
-/* Return the result, */
-   return result;
-}
-
-void astInitSelectorMapVtab_(  AstSelectorMapVtab *vtab, const char *name, int *status ) {
-/*
-*+
-*  Name:
-*     astInitSelectorMapVtab
-
-*  Purpose:
-*     Initialise a virtual function table for a SelectorMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "selectormap.h"
-*     void astInitSelectorMapVtab( AstSelectorMapVtab *vtab, const char *name )
-
-*  Class Membership:
-*     SelectorMap vtab initialiser.
-
-*  Description:
-*     This function initialises the component of a virtual function
-*     table which is used by the SelectorMap class.
-
-*  Parameters:
-*     vtab
-*        Pointer to the virtual function table. The components used by
-*        all ancestral classes will be initialised if they have not already
-*        been initialised.
-*     name
-*        Pointer to a constant null-terminated character string which contains
-*        the name of the class to which the virtual function table belongs (it
-*        is this pointer value that will subsequently be returned by the Object
-*        astClass function).
-*-
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstObjectVtab *object;        /* Pointer to Object component of Vtab */
-   AstMappingVtab *mapping;      /* Pointer to Mapping component of Vtab */
-
-/* Check the local error status. */
-   if ( !astOK ) return;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Initialize the component of the virtual function table used by the
-   parent class. */
-   astInitMappingVtab( (AstMappingVtab *) vtab, name );
-
-/* Store a unique "magic" value in the virtual function table. This
-   will be used (by astIsASelectorMap) to determine if an object belongs to
-   this class.  We can conveniently use the address of the (static)
-   class_check variable to generate this unique value. */
-   vtab->id.check = &class_check;
-   vtab->id.parent = &(((AstMappingVtab *) vtab)->id);
-
-/* Initialise member function pointers. */
-/* ------------------------------------ */
-/* Store pointers to the member functions (implemented here) that
-   provide virtual methods for this class. */
-
-/* None. */
-
-/* Save the inherited pointers to methods that will be extended, and
-   replace them with pointers to the new member functions. */
-   object = (AstObjectVtab *) vtab;
-   mapping = (AstMappingVtab *) vtab;
-   parent_getobjsize = object->GetObjSize;
-   object->GetObjSize = GetObjSize;
-
-#if defined(THREAD_SAFE)
-   parent_managelock = object->ManageLock;
-   object->ManageLock = ManageLock;
-#endif
-
-   parent_transform = mapping->Transform;
-   mapping->Transform = Transform;
-
-/* Store replacement pointers for methods which will be over-ridden by
-   new member functions implemented here. */
-   object->Equal = Equal;
-   mapping->MapMerge = MapMerge;
-
-/* Declare the copy constructor, destructor and class dump function. */
-   astSetCopy( vtab, Copy );
-   astSetDelete( vtab, Delete );
-   astSetDump( vtab, Dump, "SelectorMap", "Region identification Mapping" );
-
-/* If we have just initialised the vtab for the current class, indicate
-   that the vtab is now initialised, and store a pointer to the class
-   identifier in the base "object" level of the vtab. */
-   if( vtab == &class_vtab ) {
-      class_init = 1;
-      astSetVtabClassIdentifier( vtab, &(vtab->id) );
-   }
-}
-
-#if defined(THREAD_SAFE)
-static int ManageLock( AstObject *this_object, int mode, int extra,
-                       AstObject **fail, int *status ) {
-/*
-*  Name:
-*     ManageLock
-
-*  Purpose:
-*     Manage the thread lock on an Object.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "object.h"
-*     AstObject *ManageLock( AstObject *this, int mode, int extra,
-*                            AstObject **fail, int *status )
-
-*  Class Membership:
-*     SelectorMap member function (over-rides the astManageLock protected
-*     method inherited from the parent class).
-
-*  Description:
-*     This function manages the thread lock on the supplied Object. The
-*     lock can be locked, unlocked or checked by this function as
-*     deteremined by parameter "mode". See astLock for details of the way
-*     these locks are used.
-
-*  Parameters:
-*     this
-*        Pointer to the Object.
-*     mode
-*        An integer flag indicating what the function should do:
-*
-*        AST__LOCK: Lock the Object for exclusive use by the calling
-*        thread. The "extra" value indicates what should be done if the
-*        Object is already locked (wait or report an error - see astLock).
-*
-*        AST__UNLOCK: Unlock the Object for use by other threads.
-*
-*        AST__CHECKLOCK: Check that the object is locked for use by the
-*        calling thread (report an error if not).
-*     extra
-*        Extra mode-specific information.
-*     fail
-*        If a non-zero function value is returned, a pointer to the
-*        Object that caused the failure is returned at "*fail". This may
-*        be "this" or it may be an Object contained within "this". Note,
-*        the Object's reference count is not incremented, and so the
-*        returned pointer should not be annulled. A NULL pointer is
-*        returned if this function returns a value of zero.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*    A local status value:
-*        0 - Success
-*        1 - Could not lock or unlock the object because it was already
-*            locked by another thread.
-*        2 - Failed to lock a POSIX mutex
-*        3 - Failed to unlock a POSIX mutex
-*        4 - Bad "mode" value supplied.
-
-*  Notes:
-*     - This function attempts to execute even if an error has already
-*     occurred.
-*/
-
-/* Local Variables: */
-   AstSelectorMap *this;       /* Pointer to SelectorMap structure */
-   int i;                      /* Loop count */
-   int result;                 /* Returned status value */
-
-/* Initialise */
-   result = 0;
-
-/* Check the supplied pointer is not NULL. */
-   if( !this_object ) return result;
-
-/* Obtain a pointers to the SelectorMap structure. */
-   this = (AstSelectorMap *) this_object;
-
-/* Invoke the ManageLock method inherited from the parent class. */
-   if( !result ) result = (*parent_managelock)( this_object, mode, extra,
-                                                fail, status );
-
-/* Invoke the astManageLock method on any Objects contained within
-   the supplied Object. */
-   for( i = 0; i < this->nreg; i++ ) {
-      if( !result ) result = astManageLock( this->reg[ i ], mode, extra, fail );
-   }
-
-   return result;
-
-}
-#endif
-
-static int MapMerge( AstMapping *this, int where, int series, int *nmap,
-                     AstMapping ***map_list, int **invert_list, int *status ) {
-/*
-*  Name:
-*     MapMerge
-
-*  Purpose:
-*     Simplify a sequence of Mappings containing a SelectorMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "mapping.h"
-*     int MapMerge( AstMapping *this, int where, int series, int *nmap,
-*                   AstMapping ***map_list, int **invert_list, int *status )
-
-*  Class Membership:
-*     SelectorMap method (over-rides the protected astMapMerge method
-*     inherited from the Mapping class).
-
-*  Description:
-*     This function attempts to simplify a sequence of Mappings by
-*     merging a nominated SelectorMap in the sequence with its neighbours,
-*     so as to shorten the sequence if possible.
-*
-*     In many cases, simplification will not be possible and the
-*     function will return -1 to indicate this, without further
-*     action.
-*
-*     In most cases of interest, however, this function will either
-*     attempt to replace the nominated SelectorMap with one which it
-*     considers simpler, or to merge it with the Mappings which
-*     immediately precede it or follow it in the sequence (both will
-*     normally be considered). This is sufficient to ensure the
-*     eventual simplification of most Mapping sequences by repeated
-*     application of this function.
-*
-*     In some cases, the function may attempt more elaborate
-*     simplification, involving any number of other Mappings in the
-*     sequence. It is not restricted in the type or scope of
-*     simplification it may perform, but will normally only attempt
-*     elaborate simplification in cases where a more straightforward
-*     approach is not adequate.
-
-*  Parameters:
-*     this
-*        Pointer to the nominated SelectorMap which is to be merged with
-*        its neighbours. This should be a cloned copy of the SelectorMap
-*        pointer contained in the array element "(*map_list)[where]"
-*        (see below). This pointer will not be annulled, and the
-*        SelectorMap it identifies will not be modified by this function.
-*     where
-*        Index in the "*map_list" array (below) at which the pointer
-*        to the nominated SelectorMap resides.
-*     series
-*        A non-zero value indicates that the sequence of Mappings to
-*        be simplified will be applied in series (i.e. one after the
-*        other), whereas a zero value indicates that they will be
-*        applied in parallel (i.e. on successive sub-sets of the
-*        input/output coordinates).
-*     nmap
-*        Address of an int which counts the number of Mappings in the
-*        sequence. On entry this should be set to the initial number
-*        of Mappings. On exit it will be updated to record the number
-*        of Mappings remaining after simplification.
-*     map_list
-*        Address of a pointer to a dynamically allocated array of
-*        Mapping pointers (produced, for example, by the astMapList
-*        method) which identifies the sequence of Mappings. On entry,
-*        the initial sequence of Mappings to be simplified should be
-*        supplied.
-*
-*        On exit, the contents of this array will be modified to
-*        reflect any simplification carried out. Any form of
-*        simplification may be performed. This may involve any of: (a)
-*        removing Mappings by annulling any of the pointers supplied,
-*        (b) replacing them with pointers to new Mappings, (c)
-*        inserting additional Mappings and (d) changing their order.
-*
-*        The intention is to reduce the number of Mappings in the
-*        sequence, if possible, and any reduction will be reflected in
-*        the value of "*nmap" returned. However, simplifications which
-*        do not reduce the length of the sequence (but improve its
-*        execution time, for example) may also be performed, and the
-*        sequence might conceivably increase in length (but normally
-*        only in order to split up a Mapping into pieces that can be
-*        more easily merged with their neighbours on subsequent
-*        invocations of this function).
-*
-*        If Mappings are removed from the sequence, any gaps that
-*        remain will be closed up, by moving subsequent Mapping
-*        pointers along in the array, so that vacated elements occur
-*        at the end. If the sequence increases in length, the array
-*        will be extended (and its pointer updated) if necessary to
-*        accommodate any new elements.
-*
-*        Note that any (or all) of the Mapping pointers supplied in
-*        this array may be annulled by this function, but the Mappings
-*        to which they refer are not modified in any way (although
-*        they may, of course, be deleted if the annulled pointer is
-*        the final one).
-*     invert_list
-*        Address of a pointer to a dynamically allocated array which,
-*        on entry, should contain values to be assigned to the Invert
-*        attributes of the Mappings identified in the "*map_list"
-*        array before they are applied (this array might have been
-*        produced, for example, by the astMapList method). These
-*        values will be used by this function instead of the actual
-*        Invert attributes of the Mappings supplied, which are
-*        ignored.
-*
-*        On exit, the contents of this array will be updated to
-*        correspond with the possibly modified contents of the
-*        "*map_list" array.  If the Mapping sequence increases in
-*        length, the "*invert_list" array will be extended (and its
-*        pointer updated) if necessary to accommodate any new
-*        elements.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     If simplification was possible, the function returns the index
-*     in the "map_list" array of the first element which was
-*     modified. Otherwise, it returns -1 (and makes no changes to the
-*     arrays supplied).
-
-*  Notes:
-*     - A value of -1 will be returned if this function is invoked
-*     with the global error status set, or if it should fail for any
-*     reason.
-*/
-
-/* Local Variables: */
-   AstMapping *new;
-   AstRegion **sreg;
-   AstSelectorMap *map;
-   AstSelectorMap *slneb;
-   int equal;
-   int i;
-   int ilo;
-   int nreg;
-   int result;
-   int simp;
-
-/* Initialise.*/
-   result = -1;
-
-/* Check the inherited status. */
-   if ( !astOK ) return result;
-
-/* Get a pointer to this SelectorMap, and note the number of Regions. */
-   map = (AstSelectorMap *) this;
-   nreg = map->nreg;
-
-/* Attempt to simplify the SelectorMap on its own. */
-/* ============================================= */
-
-/* Try to simplify each of the encapsulated Regions, noting if any
-   simplification takes place. */
-   simp = 0;
-   sreg = astMalloc( sizeof( AstRegion * )*nreg );
-   if( astOK ) {
-      for( i = 0; i < nreg; i++ ) {
-         sreg[ i ] = astSimplify( map->reg[ i ] );
-         simp = simp || ( sreg[ i ] != map->reg[ i ] );
-      }
-
-/* If any simplification took place, construct a new SelectorMap from these
-   simplified Mappings. */
-      if( simp ) {
-         (void) astAnnul( ( *map_list )[ where ] );
-         ( *map_list )[ where ] = (AstMapping *) astSelectorMap( nreg,
-                                                          (void **) sreg,
-                                                          map->badval, "", status );
-         result = where;
-      }
-
-/* Release resources. */
-      if( sreg ) {
-         for( i = 0; i < nreg; i++ ) sreg[ i ] = astAnnul( sreg[ i ] );
-         sreg = astFree( sreg );
-      }
-   }
-
-/* If possible, merge the SelectorMap with a neighbouring SelectorMap. */
-/* =============================================================== */
-/* Only do this if no change was made above, and we are combining the
-   Mappings in series. */
-   if( result == -1 && series ) {
-
-/* Is the higher neighbour a SelectorMap? If so get a pointer to it, and
-   note the index of the lower of the two adjacent SelectorMaps. */
-      if( where < ( *nmap - 1 ) &&
-          astIsASelectorMap( ( *map_list )[ where + 1 ] ) ){
-         slneb = (AstSelectorMap *) ( *map_list )[ where + 1 ];
-         ilo = where;
-
-/* If not, is the lower neighbour a SelectorMap? If so get a pointer to it, and
-   note the index of the lower of the two adjacent SelectorMaps. */
-      } else if( where > 0 &&
-                 astIsASelectorMap( ( *map_list )[ where - 1 ] ) ){
-         slneb = (AstSelectorMap *) ( *map_list )[ where - 1 ];
-         ilo =  where - 1;
-
-      } else {
-         slneb = NULL;
-      }
-
-/* If a neighbouring SelectorMap was found, we can replace the pair by a
-   UnitMap if the two SelectorMaps are equal but have opposite values for
-   their Invert flags. Temporarily invert the neighbour, then compare
-   the two SelectorMaps for equality, then re-invert the neighbour. */
-      if( slneb ) {
-         astInvert( slneb );
-         equal = astEqual( map, slneb );
-         astInvert( slneb );
-
-/* If the two SelectorMaps are equal but opposite, annul the first of the two
-   Mappings, and replace it with a UnitMap. Also set the invert flag. */
-         if( equal ) {
-            new = (AstMapping *) astUnitMap( astGetNin( ( *map_list )[ ilo ] ), "", status );
-            (void) astAnnul( ( *map_list )[ ilo ] );
-            ( *map_list )[ ilo ] = new;
-            ( *invert_list )[ ilo ] = 0;
-
-/* Annul the second of the two Mappings, and shuffle down the rest of the
-   list to fill the gap. */
-            (void) astAnnul( ( *map_list )[ ilo + 1 ] );
-            for ( i = ilo + 2; i < *nmap; i++ ) {
-               ( *map_list )[ i - 1 ] = ( *map_list )[ i ];
-               ( *invert_list )[ i - 1 ] = ( *invert_list )[ i ];
-            }
-
-/* Clear the vacated element at the end. */
-            ( *map_list )[ *nmap - 1 ] = NULL;
-            ( *invert_list )[ *nmap - 1 ] = 0;
-
-/* Decrement the Mapping count and return the index of the first
-   modified element. */
-            ( *nmap )--;
-            result = where;
-         }
-      }
-   }
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = -1;
-
-/* Return the result. */
-   return result;
-}
-
-static AstPointSet *Transform( AstMapping *this, AstPointSet *in,
-                               int forward, AstPointSet *out, int *status ) {
-/*
-*  Name:
-*     Transform
-
-*  Purpose:
-*     Apply a SelectorMap to transform a set of points.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "selectormap.h"
-*     AstPointSet *Transform( AstMapping *this, AstPointSet *in,
-*                             int forward, AstPointSet *out, int *status )
-
-*  Class Membership:
-*     SelectorMap member function (over-rides the astTransform method inherited
-*     from the Mapping class).
-
-*  Description:
-*     This function takes a SelectorMap and a set of points encapsulated in a
-*     PointSet and transforms the points so as to apply the required Mapping.
-*     This implies applying each of the SelectorMap's component Mappings in turn,
-*     either in series or in parallel.
-
-*  Parameters:
-*     this
-*        Pointer to the SelectorMap.
-*     in
-*        Pointer to the PointSet associated with the input coordinate values.
-*     forward
-*        A non-zero value indicates that the forward coordinate transformation
-*        should be applied, while a zero value requests the inverse
-*        transformation.
-*     out
-*        Pointer to a PointSet which will hold the transformed (output)
-*        coordinate values. A NULL value may also be given, in which case a
-*        new PointSet will be created by this function.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     Pointer to the output (possibly new) PointSet.
-
-*  Notes:
-*     -  A null pointer will be returned if this function is invoked with the
-*     global error status set, or if it should fail for any reason.
-*     -  The number of coordinate values per point in the input PointSet must
-*     match the number of coordinates for the SelectorMap being applied.
-*     -  If an output PointSet is supplied, it must have space for sufficient
-*     number of points and coordinate values per point to accommodate the
-*     result. Any excess space will be ignored.
-*/
-
-/* Local Variables: */
-   AstPointSet *ps1;
-   AstPointSet *ps2;
-   AstPointSet *result;
-   AstPointSet *tps;
-   AstRegion *reg;
-   AstSelectorMap *map;
-   double **ptr_out;
-   double **ptr1;
-   double **ptr2;
-   double **tptr;
-   double *p2;
-   double *pout;
-   double badval;
-   int bad;
-   int closed;
-   int icoord;
-   int ipoint;
-   int ireg;
-   int ncoord;
-   int npoint;
-
-/* Check the global error status. */
-   if ( !astOK ) return NULL;
-
-/* Obtain a pointer to the SelectorMap. */
-   map = (AstSelectorMap *) this;
-
-/* Apply the parent Mapping using the stored pointer to the Transform member
-   function inherited from the parent Mapping class. This function validates
-   all arguments and generates an output PointSet if necessary, but does not
-   actually transform any coordinate values. */
-   result = (*parent_transform)( this, in, forward, out, status );
-
-/* We now extend the parent astTransform method by applying the component
-   Mappings of the SelectorMap to generate the output coordinate values. */
-
-/* Check we are implementing the original forward transformation (the
-   inverse transformation is not defined). */
-   if( forward != astGetInvert( this ) ) {
-
-/* Get the number of input axes and the number of points. */
-      ncoord = astGetNcoord( in );
-      npoint = astGetNpoint( in );
-
-/* Create two temporary PointSets to hold copies of the input points. */
-      ps1 = astCopy( in );
-      ptr1 = astGetPoints( ps1 );
-      ps2 = astPointSet( npoint, ncoord, "", status );
-      ptr2 = astGetPoints( ps2 );
-
-/* Get a pointer to the output data */
-      ptr_out = astGetPoints( result );
-      if( astOK ) {
-
-/* Initialise the output array to hold -1 at any points that have
-   bad input axis values, and zero at all other points. */
-         pout = ptr_out[ 0 ];
-         for( ipoint = 0; ipoint < npoint; ipoint++ ) {
-            bad = 0;
-            for( icoord = 0; icoord < ncoord; icoord++ ) {
-               if( ptr1[ icoord ][ ipoint ] == AST__BAD ) {
-                  bad = 1;
-                  break;
-               }
-            }
-            *(pout++) = bad ? -1 : 0;
-         }
-
-/* Loop round all Regions. */
-         for( ireg = 1; ireg <= map->nreg; ireg++ ) {
-            reg = map->reg[ ireg - 1 ];
-
-/* Temporarily Negate the Region. */
-            astNegate( reg );
-            closed = astGetClosed( reg );
-            astSetClosed( reg, !closed );
-
-/* Transform the remaining input positions. Good input positions which
-   are within the Region will be bad in the output. */
-            ps2 = astTransform( reg, ps1, 1, ps2 );
-
-/* Loop round all positions. */
-            p2 = ptr2[ 0 ];
-            pout = ptr_out[ 0 ];
-            for( ipoint = 0; ipoint < npoint; ipoint++, p2++, pout++ ) {
-
-/* Any position that has not already been assigned to a Region and is bad
-   in the output PointSet must be contained within the current Region, so
-   assign the (one-based) index of the current Region to the output element. */
-               if( *pout == 0 && *p2 == AST__BAD ) *pout = ireg;
-            }
-
-/* Negate the Region to get it back to its original state. */
-            astSetClosed( reg, closed );
-            astNegate( reg );
-
-/* Swap the input and output PointSets. */
-            tps = ps1;
-            ps1 = ps2;
-            ps2 = tps;
-            tptr = ptr1;
-            ptr1 = ptr2;
-            ptr2 = tptr;
-         }
-
-/* Replace -1 values in the output (that indicate that the input position
-   had at least one bad axis value) with the "badval".*/
-         badval = map->badval;
-         pout = ptr_out[ 0 ];
-         for( ipoint = 0; ipoint < npoint; ipoint++, pout++ ) {
-            if( *pout == -1 ) *pout = badval;
-         }
-      }
-
-/* Free resources. */
-      ps1 = astAnnul( ps1 );
-      ps2 = astAnnul( ps2 );
-   }
-
-/* If an error occurred, clean up by deleting the output PointSet (if
-   allocated by this function) and setting a NULL result pointer. */
-   if ( !astOK ) {
-      if ( !out ) result = astDelete( result );
-      result = NULL;
-   }
-
-/* Return a pointer to the output PointSet. */
-   return result;
-}
-
-/* Copy constructor. */
-/* ----------------- */
-static void Copy( const AstObject *objin, AstObject *objout, int *status ) {
-/*
-*  Name:
-*     Copy
-
-*  Purpose:
-*     Copy constructor for SelectorMap objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Copy( const AstObject *objin, AstObject *objout, int *status )
-
-*  Description:
-*     This function implements the copy constructor for SelectorMap objects.
-
-*  Parameters:
-*     objin
-*        Pointer to the object to be copied.
-*     objout
-*        Pointer to the object being constructed.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     void
-
-*  Notes:
-*     -  This constructor makes a deep copy, including a copy of the
-*     Regions within the SelectorMap.
-*/
-
-/* Local Variables: */
-   AstSelectorMap *in;                /* Pointer to input SelectorMap */
-   AstSelectorMap *out;               /* Pointer to output SelectorMap */
-   int i;                             /* Loop count */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain pointers to the input and output SelectorMaps. */
-   in = (AstSelectorMap *) objin;
-   out = (AstSelectorMap *) objout;
-
-/* For safety, start by clearing any references to the input Regions. */
-   out->reg = NULL;
-   out->nreg = 0;
-
-/* Make copies of the Regions, and store pointers to them in the output
-   SelectorMap structure. */
-   out->reg = astMalloc( sizeof( AstRegion * )*( in->nreg ) );
-   if( astOK ) {
-      for( i = 0; i < in->nreg; i++ ) {
-         out->reg[ i ] = astCopy( in->reg[ i ] );
-      }
-      out->nreg = in->nreg;
-   }
-
-}
-
-/* Destructor. */
-/* ----------- */
-static void Delete( AstObject *obj, int *status ) {
-/*
-*  Name:
-*     Delete
-
-*  Purpose:
-*     Destructor for SelectorMap objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Delete( AstObject *obj, int *status )
-
-*  Description:
-*     This function implements the destructor for SelectorMap objects.
-
-*  Parameters:
-*     obj
-*        Pointer to the object to be deleted.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     void
-
-*  Notes:
-*     This function attempts to execute even if the global error status is
-*     set.
-*/
-
-/* Local Variables: */
-   AstSelectorMap *this;              /* Pointer to SelectorMap */
-   int i;
-
-/* Obtain a pointer to the SelectorMap structure. */
-   this = (AstSelectorMap *) obj;
-
-/* Free dynamically allocated resources. */
-   for( i = 0; i < this->nreg; i++ ) {
-      this->reg[ i ] = astAnnul( this->reg[ i ] );
-   }
-   this->reg = astFree( this->reg );
-
-/* Clear the remaining SelectorMap variables. */
-   this->nreg = 0;
-}
-
-/* Dump function. */
-/* -------------- */
-static void Dump( AstObject *this_object, AstChannel *channel, int *status ) {
-/*
-*  Name:
-*     Dump
-
-*  Purpose:
-*     Dump function for SelectorMap objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Dump( AstObject *this, AstChannel *channel, int *status )
-
-*  Description:
-*     This function implements the Dump function which writes out data
-*     for the SelectorMap class to an output Channel.
-
-*  Parameters:
-*     this
-*        Pointer to the SelectorMap whose data are being written.
-*     channel
-*        Pointer to the Channel to which the data are being written.
-*     status
-*        Pointer to the inherited status variable.
-*/
-
-/* Local Variables: */
-   AstSelectorMap *this;
-   int i;
-   char buf[ 20 ];
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain a pointer to the SelectorMap structure. */
-   this = (AstSelectorMap *) this_object;
-
-/* Write out values representing the instance variables for the SelectorMap
-   class.  Accompany these with appropriate comment strings, possibly
-   depending on the values being written.*/
-
-/* In the case of attributes, we first use the appropriate (private)
-   Test...  member function to see if they are set. If so, we then use
-   the (private) Get... function to obtain the value to be written
-   out.
-
-   For attributes which are not set, we use the astGet... method to
-   obtain the value instead. This will supply a default value
-   (possibly provided by a derived class which over-rides this method)
-   which is more useful to a human reader as it corresponds to the
-   actual default attribute value.  Since "set" will be zero, these
-   values are for information only and will not be read back. */
-
-/* Loop to dump each Region. */
-/* ------------------------- */
-/* The coordinate Frame of the Regions is defined by the first Region.
-   The Frame information is omitted from the second and subsequent
-   Regions by setting the protected RegionFS attribute to zero. */
-   for( i = 0; i < this->nreg; i++ ) {
-      sprintf( buf, "Reg%d", i + 1 );
-      if( i > 0 ) astSetRegionFS( this->reg[ i ], 0 );
-      astWriteObject( channel, buf, 1, 1, this->reg[ i ],
-                      "Region of input space" );
-      if( i > 0 ) astClearRegionFS( this->reg[ i ] );
-   }
-
-/* BadVal. */
-/* ------- */
-   if( this->badval != AST__BAD ) {
-      astWriteDouble( channel, "BadVal", 1, 1, this->badval,
-                      "Output value for bad input positions" );
-   }
-
-}
-
-/* Standard class functions. */
-/* ========================= */
-/* Implement the astIsASelectorMap and astCheckSelectorMap functions using the
-   macros defined for this purpose in the "object.h" header file. */
-astMAKE_ISA(SelectorMap,Mapping)
-astMAKE_CHECK(SelectorMap)
-
-AstSelectorMap *astSelectorMap_( int nreg, void **regs_void, double badval,
-                                 const char *options, int *status, ...) {
-/*
-*+
-*  Name:
-*     astSelectorMap
-
-*  Purpose:
-*     Create a SelectorMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "selectormap.h"
-*     AstSelectorMap *astSelectorMap( int nreg, AstRegion **regs,
-*                                     double badval, const char *options, ... )
-
-*  Class Membership:
-*     SelectorMap constructor.
-
-*  Description:
-*     This function creates a new SelectorMap and optionally initialises its
-*     attributes.
-
-*  Parameters:
-*     nreg
-*        The number of Regions supplied.
-*     regs
-*        An array of pointers to the Regions. Deep copies of these
-*        Regions are taken.
-*     badval
-*        The value to be returned by the forward transformation of the
-*        SelectorMap for any input positions that have a bad (AST__BAD)
-*        value on any axis.
-*     options
-*        Pointer to a null terminated string containing an optional
-*        comma-separated list of attribute assignments to be used for
-*        initialising the new SelectorMap. The syntax used is the same as for the
-*        astSet method and may include "printf" format specifiers identified
-*        by "%" symbols in the normal way.
-*     ...
-*        If the "options" string contains "%" format specifiers, then an
-*        optional list of arguments may follow it in order to supply values to
-*        be substituted for these specifiers. The rules for supplying these
-*        are identical to those for the astSet method (and for the C "printf"
-*        function).
-
-*  Returned Value:
-*     A pointer to the new SelectorMap.
-
-*  Notes:
-*     - A null pointer will be returned if this function is invoked
-*     with the global error status set, or if it should fail for any
-*     reason.
-*-
-
-*  Implementation Notes:
-*     - This function implements the basic SelectorMap constructor which is
-*     available via the protected interface to the SelectorMap class.  A
-*     public interface is provided by the astSelectorMapId_ function.
-*     - Because this function has a variable argument list, it is
-*     invoked by a macro that evaluates to a function pointer (not a
-*     function invocation) and no checking or casting of arguments is
-*     performed before the function is invoked. Because of this, the
-*     "map1" and "map2" parameters are of type (void *) and are
-*     converted and validated within the function itself.
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstSelectorMap *new;          /* Pointer to new SelectorMap */
-   AstRegion **regs;             /* Array of Region pointers */
-   int i;                        /* Region index */
-   va_list args;                 /* Variable argument list */
-
-/* Initialise. */
-   new = NULL;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Check the global status. */
-   if ( !astOK ) return new;
-
-/* Report an error if no Regions have been supplied. */
-   if( nreg <= 0 ) astError( AST__BDPAR, "astSelectorMap(SelectorMap): "
-                            "Bad number of Regions (%d) specified.", status, nreg );
-
-/* Otherwise create an array to hold the Region pointers. */
-   regs = astMalloc( sizeof( AstRegion * )*nreg );
-
-/* Obtain and validate pointers to the Region structures provided. */
-   if( astOK ) {
-      for( i = 0; i < nreg; i++ ) {
-         regs[ i ] = astCheckRegion( regs_void[ i ] );
-      }
-   }
-
-   if ( astOK ) {
-
-/* Initialise the SelectorMap, allocating memory and initialising the
-   virtual function table as well if necessary. */
-      new = astInitSelectorMap( NULL, sizeof( AstSelectorMap ), !class_init, &class_vtab,
-                              "SelectorMap", nreg, regs, badval );
-
-/* If successful, note that the virtual function table has been
-   initialised. */
-      if ( astOK ) {
-         class_init = 1;
-
-/* Obtain the variable argument list and pass it along with the
-   options string to the astVSet method to initialise the new SelectorMap's
-   attributes. */
-         va_start( args, status );
-         astVSet( new, options, NULL, args );
-         va_end( args );
-
-/* If an error occurred, clean up by deleting the new object. */
-         if ( !astOK ) new = astDelete( new );
-      }
-   }
-
-/* Free memory used to hold the Regions pointers. */
-   regs = astFree( regs );
-
-/* Return a pointer to the new SelectorMap. */
-   return new;
-}
-
-AstSelectorMap *astSelectorMapId_( int nreg, void **regs_void, double badval,
-                                   const char *options, ... ) {
-/*
-*++
-*  Name:
-c     astSelectorMap
-f     AST_SELECTORMAP
-
-*  Purpose:
-*     Create a SelectorMap.
-
-*  Type:
-*     Public function.
-
-*  Synopsis:
-c     #include "selectormap.h"
-c     AstSelectorMap *astSelectorMap( int nreg, AstRegion *regs[],
-c                                     double badval, const char *options, ... )
-f     RESULT = AST_SELECTORMAP( NREG, REGS, BADVAL, OPTIONS, STATUS )
-
-*  Class Membership:
-*     SelectorMap constructor.
-
-*  Description:
-*     This function creates a new SelectorMap and optionally initialises
-*     its attributes.
-*
-*     A SelectorMap is a Mapping that identifies which Region contains
-*     a given input position.
-*
-*     A SelectorMap encapsulates a number of Regions that all have the same
-*     number of axes and represent the same coordinate Frame. The number of
-*     inputs (Nin attribute) of the SelectorMap equals the number of axes
-*     spanned by one of the encapsulated Region. All SelectorMaps have only
-*     a single output. SelectorMaps do not define an inverse transformation.
-*
-*     For each input position, the forward transformation of a SelectorMap
-*     searches through the encapsulated Regions (in the order supplied when
-*     the SelectorMap was created) until a Region is found which contains
-*     the input position. The index associated with this Region is
-*     returned as the SelectorMap output value (the index value is the
-*     position of the Region within the list of Regions supplied when the
-*     SelectorMap was created, starting at 1 for the first Region). If an
-*     input position is not contained within any Region, a value of zero is
-*     returned by the forward transformation.
-*
-*     If a compound Mapping contains a SelectorMap in series with its own
-*     inverse, the combination of the two adjacent SelectorMaps will be
-*     replaced by a UnitMap when the compound Mapping is simplified using
-c     astSimplify.
-f     AST_SIMPLIFY.
-*
-*     In practice, SelectorMaps are often used in conjunction with SwitchMaps.
-
-*  Parameters:
-c     nreg
-f     NREG = INTEGER (Given)
-*        The number of supplied Regions.
-c     regs
-f     REGS( NREG ) = INTEGER (Given)
-*        An array of pointers to the Regions. All the supplied Regions must
-*        relate to the same coordinate Frame. The number of axes in this
-*        coordinate Frame defines the number of inputs for the SelectorMap.
-c     badval
-f     BADVAL = DOUBLE PRECISION (Given)
-*        The value to be returned by the forward transformation of the
-*        SelectorMap for any input positions that have a bad (AST__BAD)
-*        value on any axis.
-c     options
-f     OPTIONS = CHARACTER * ( * ) (Given)
-c        Pointer to a null-terminated string containing an optional
-c        comma-separated list of attribute assignments to be used for
-c        initialising the new SelectorMap. The syntax used is identical to
-c        that for the astSet function and may include "printf" format
-c        specifiers identified by "%" symbols in the normal way.
-f        A character string containing an optional comma-separated
-f        list of attribute assignments to be used for initialising the
-f        new SelectorMap. The syntax used is identical to that for the
-f        AST_SET routine.
-c     ...
-c        If the "options" string contains "%" format specifiers, then
-c        an optional list of additional arguments may follow it in
-c        order to supply values to be substituted for these
-c        specifiers. The rules for supplying these are identical to
-c        those for the astSet function (and for the C "printf"
-c        function).
-f     STATUS = INTEGER (Given and Returned)
-f        The global status.
-
-*  Returned Value:
-c     astSelectorMap()
-f     AST_SELECTORMAP = INTEGER
-*        A pointer to the new SelectorMap.
-
-*  Notes:
-*     - Deep copies are taken of the supplied Regions. This means that
-*     any subsequent changes made to the component Regions using the
-*     supplied pointers will have no effect on the SelectorMap.
-*     - A null Object pointer (AST__NULL) will be returned if this
-c     function is invoked with the AST error status set, or if it
-f     function is invoked with STATUS set to an error value, or if it
-*     should fail for any reason.
-*--
-
-*  Implementation Notes:
-*     - This function implements the external (public) interface to
-*     the astSelectorMap constructor function. It returns an ID value
-*     (instead of a true C pointer) to external users, and must be
-*     provided because astSelectorMap_ has a variable argument list which
-*     cannot be encapsulated in a macro (where this conversion would
-*     otherwise occur).
-*     - Because no checking or casting of arguments is performed
-*     before the function is invoked, the "map1" and "map2" parameters
-*     are of type (void *) and are converted from an ID value to a
-*     pointer and validated within the function itself.
-*     - The variable argument list also prevents this function from
-*     invoking astSelectorMap_ directly, so it must be a re-implementation
-*     of it in all respects, except for the conversions between IDs
-*     and pointers on input/output of Objects.
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstSelectorMap *new;          /* Pointer to new SelectorMap */
-   AstRegion **regs;             /* Array of Region pointers */
-   int i;                        /* Region index */
-   va_list args;                 /* Variable argument list */
-
-   int *status;                  /* Pointer to inherited status value */
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Initialise. */
-   new = NULL;
-
-/* Get a pointer to the inherited status value. */
-   status = astGetStatusPtr;
-
-/* Check the global status. */
-   if ( !astOK ) return new;
-
-/* Report an error if no Regions have been supplied. */
-   if( nreg <= 0 ) astError( AST__BDPAR, "astSelectorMap(SelectorMap): "
-                             "Bad number of Regions (%d) specified.", status, nreg );
-
-/* Create an array to hold the Region pointers. */
-   regs = astMalloc( sizeof( AstRegion * )*nreg );
-
-/* Obtain and validate pointers to the Region structures provided. */
-   if( astOK ) {
-      for( i = 0; i < nreg; i++ ) {
-         regs[ i ] = astVerifyRegion( astMakePointer(regs_void[ i ]) );
-      }
-   }
-
-   if ( astOK ) {
-
-/* Initialise the SelectorMap, allocating memory and initialising the
-   virtual function table as well if necessary. */
-      new = astInitSelectorMap( NULL, sizeof( AstSelectorMap ), !class_init,
-                                &class_vtab, "SelectorMap", nreg, regs,
-                                badval );
-
-/* If successful, note that the virtual function table has been
-   initialised. */
-      if ( astOK ) {
-         class_init = 1;
-
-/* Obtain the variable argument list and pass it along with the
-   options string to the astVSet method to initialise the new SelectorMap's
-   attributes. */
-         va_start( args, options );
-         astVSet( new, options, NULL, args );
-         va_end( args );
-
-/* If an error occurred, clean up by deleting the new object. */
-         if ( !astOK ) new = astDelete( new );
-      }
-   }
-
-/* Free memory used to hold the Regions pointers. */
-   regs = astFree( regs );
-
-/* Return an ID value for the new SelectorMap. */
-   return astMakeId( new );
-}
-
-AstSelectorMap *astInitSelectorMap_( void *mem, size_t size, int init,
-                                     AstSelectorMapVtab *vtab, const char *name,
-                                     int nreg, AstRegion **regs, double badval, int *status ) {
-/*
-*+
-*  Name:
-*     astInitSelectorMap
-
-*  Purpose:
-*     Initialise a SelectorMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "selectormap.h"
-*     AstSelectorMap *astInitSelectorMap( void *mem, size_t size, int init,
-*                                         AstSelectorMapVtab *vtab, const char *name,
-*                                         int nreg, AstRegion **regs, double badval )
-
-*  Class Membership:
-*     SelectorMap initialiser.
-
-*  Description:
-*     This function is provided for use by class implementations to initialise
-*     a new SelectorMap object. It allocates memory (if necessary) to
-*     accommodate the SelectorMap plus any additional data associated with the
-*     derived class. It then initialises a SelectorMap structure at the start
-*     of this memory. If the "init" flag is set, it also initialises the
-*     contents of a virtual function table for a SelectorMap at the start of
-*     the memory passed via the "vtab" parameter.
-
-*  Parameters:
-*     mem
-*        A pointer to the memory in which the SelectorMap is to be initialised.
-*        This must be of sufficient size to accommodate the SelectorMap data
-*        (sizeof(SelectorMap)) plus any data used by the derived class. If a
-*        value of NULL is given, this function will allocate the memory itself
-*        using the "size" parameter to determine its size.
-*     size
-*        The amount of memory used by the SelectorMap (plus derived class
-*        data). This will be used to allocate memory if a value of NULL is
-*        given for the "mem" parameter. This value is also stored in the
-*        SelectorMap structure, so a valid value must be supplied even if not
-*        required for allocating memory.
-*     init
-*        A logical flag indicating if the SelectorMap's virtual function table
-*        is to be initialised. If this value is non-zero, the virtual function
-*        table will be initialised by this function.
-*     vtab
-*        Pointer to the start of the virtual function table to be associated
-*        with the new SelectorMap.
-*     name
-*        Pointer to a constant null-terminated character string which contains
-*        the name of the class to which the new object belongs (it is this
-*        pointer value that will subsequently be returned by the Object
-*        astClass function).
-*     nreg
-*        The number of Regions supplied.
-*     regs
-*        An array holdiong pointers to the Regions. Deep copies are taken
-*        of these Regions.
-*     badval
-*        The value to be returned by the forward transformation of the
-*        SelectorMap for any input positions that have a bad (AST__BAD)
-*        value on any axis.
-
-*  Returned Value:
-*     A pointer to the new SelectorMap.
-
-*  Notes:
-*     -  A null pointer will be returned if this function is invoked with the
-*     global error status set, or if it should fail for any reason.
-*-
-*/
-
-/* Local Variables: */
-   AstFrame *f0;                 /* Frame from first Region */
-   AstFrame *f1;                 /* Frame from current Region */
-   AstSelectorMap *new;          /* Pointer to new SelectorMap */
-   int equal;                    /* Are Frames equal? */
-   int i;                        /* Loop count */
-   int nin;                      /* No. input coordinates for SelectorMap */
-
-/* Check the global status. */
-   if ( !astOK ) return NULL;
-
-/* If necessary, initialise the virtual function table. */
-   if ( init ) astInitSelectorMapVtab( vtab, name );
-
-/* Initialise. */
-   new = NULL;
-
-/* Check that all Regions refer to the same Frame. */
-   f0 = astRegFrame( regs[ 0 ] );
-   for( i = 1; i < nreg; i++ ) {
-      f1 = astRegFrame( regs[ i ] );
-      equal = astEqual( f1, f0 );
-      f1 = astAnnul( f1 );
-
-      if( !equal ) {
-         if( astOK ) {
-            astError( AST__BADNI, "astInitSelectorMap(%s): Region "
-                      "number %d does not refer to the same coordinate "
-                      "Frame as the first Region.", status, name, i + 1 );
-         }
-      }
-   }
-
-   nin = astGetNin( regs[ 0 ] );
-   f0 = astAnnul( f0 );
-
-/* Initialise a Mapping structure (the parent class) as the first component
-   within the SelectorMap structure, allocating memory if necessary. Specify
-   the number of input and output coordinates and in which directions the
-   Mapping should be defined. */
-   if ( astOK ) {
-      new = (AstSelectorMap *) astInitMapping( mem, size, 0,
-                                             (AstMappingVtab *) vtab, name,
-                                             nin, 1, 1, 0 );
-      if ( astOK ) {
-
-/* Initialise the SelectorMap data. */
-/* -------------------------------- */
-
-/* Create an array for the Region pointers. */
-         new->reg = astMalloc( sizeof( AstRegion * )*nreg );
-
-/* Store pointers to deep copies of the Regions. */
-         if( astOK ) {
-            new->nreg = nreg;
-            for( i = 0; i < nreg; i++ ) {
-               new->reg[ i ] = astCopy( regs[ i ] );
-            }
-         } else {
-            new->nreg = 0;
-         }
-
-/* Store other items */
-         new->badval = badval;
-
-/* If an error occurred, clean up by deleting the new object. */
-         if ( !astOK ) new = astDelete( new );
-      }
-   }
-
-/* Return a pointer to the new object. */
-   return new;
-}
-
-AstSelectorMap *astLoadSelectorMap_( void *mem, size_t size,
-                                     AstSelectorMapVtab *vtab, const char *name,
-                                     AstChannel *channel, int *status ) {
-/*
-*+
-*  Name:
-*     astLoadSelectorMap
-
-*  Purpose:
-*     Load a SelectorMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "selectormap.h"
-*     AstSelectorMap *astLoadSelectorMap( void *mem, size_t size,
-*                                         AstSelectorMapVtab *vtab, const char *name,
-*                                         AstChannel *channel )
-
-*  Class Membership:
-*     SelectorMap loader.
-
-*  Description:
-*     This function is provided to load a new SelectorMap using data read
-*     from a Channel. It first loads the data used by the parent class
-*     (which allocates memory if necessary) and then initialises a
-*     SelectorMap structure in this memory, using data read from the input
-*     Channel.
-*
-*     If the "init" flag is set, it also initialises the contents of a
-*     virtual function table for a SelectorMap at the start of the memory
-*     passed via the "vtab" parameter.
-
-
-*  Parameters:
-*     mem
-*        A pointer to the memory into which the SelectorMap is to be
-*        loaded.  This must be of sufficient size to accommodate the
-*        SelectorMap data (sizeof(SelectorMap)) plus any data used by derived
-*        classes. If a value of NULL is given, this function will
-*        allocate the memory itself using the "size" parameter to
-*        determine its size.
-*     size
-*        The amount of memory used by the SelectorMap (plus derived class
-*        data).  This will be used to allocate memory if a value of
-*        NULL is given for the "mem" parameter. This value is also
-*        stored in the SelectorMap structure, so a valid value must be
-*        supplied even if not required for allocating memory.
-*
-*        If the "vtab" parameter is NULL, the "size" value is ignored
-*        and sizeof(AstSelectorMap) is used instead.
-*     vtab
-*        Pointer to the start of the virtual function table to be
-*        associated with the new SelectorMap. If this is NULL, a pointer to
-*        the (static) virtual function table for the SelectorMap class is
-*        used instead.
-*     name
-*        Pointer to a constant null-terminated character string which
-*        contains the name of the class to which the new object
-*        belongs (it is this pointer value that will subsequently be
-*        returned by the astGetClass method).
-*
-*        If the "vtab" parameter is NULL, the "name" value is ignored
-*        and a pointer to the string "SelectorMap" is used instead.
-
-*  Returned Value:
-*     A pointer to the new SelectorMap.
-
-*  Notes:
-*     - A null pointer will be returned if this function is invoked
-*     with the global error status set, or if it should fail for any
-*     reason.
-*-
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstSelectorMap *new;
-   AstFrameSet *fs;
-   AstRegion *reg;
-   int i;
-   char buf[ 20 ];
-
-/* Initialise. */
-   new = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return new;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(channel);
-
-/* If a NULL virtual function table has been supplied, then this is
-   the first loader to be invoked for this SelectorMap. In this case the
-   SelectorMap belongs to this class, so supply appropriate values to be
-   passed to the parent class loader (and its parent, etc.). */
-   if ( !vtab ) {
-      size = sizeof( AstSelectorMap );
-      vtab = &class_vtab;
-      name = "SelectorMap";
-
-/* If required, initialise the virtual function table for this class. */
-      if ( !class_init ) {
-         astInitSelectorMapVtab( vtab, name );
-         class_init = 1;
-      }
-   }
-
-/* Invoke the parent class loader to load data for all the ancestral
-   classes of the current one, returning a pointer to the resulting
-   partly-built SelectorMap. */
-   new = astLoadMapping( mem, size, (AstMappingVtab *) vtab, name,
-                         channel );
-   if ( astOK ) {
-
-/* Read input data. */
-/* ================ */
-/* Request the input Channel to read all the input data appropriate to
-   this class into the internal "values list". */
-      astReadClassData( channel, "SelectorMap" );
-
-/* Now read each individual data item from this list and use it to
-   initialise the appropriate instance variable(s) for this class. */
-
-/* In the case of attributes, we first read the "raw" input value,
-   supplying the "unset" value as the default. If a "set" value is
-   obtained, we then use the appropriate (private) Set... member
-   function to validate and set the value properly. */
-
-
-/* Loop to load each Region. */
-/* ------------------------- */
-      new->reg = NULL;
-      i = 0;
-      fs = NULL;
-      while( astOK ) {
-         sprintf( buf, "reg%d", i + 1 );
-         reg = astReadObject( channel, buf, NULL );
-         if( reg ) {
-            new->reg = astGrow( new->reg, i + 1, sizeof( AstRegion *) );
-            if( astOK ) {
-               new->reg[ i ] = reg;
-
-/* All but the first Region may have a dummy FrameSet rather than the
-   correct FrameSet. The correct FrameSet will be a copy of the FrameSet
-   from the first Region. */
-               if( i == 0 ) {
-                  fs = astGetRegFS( reg );
-               } else if( astRegDummyFS( reg ) ){
-                  astSetRegFS( reg, fs );
-               }
-
-               i++;
-            }
-         } else {
-            break;
-         }
-      }
-
-      fs = astAnnul( fs );
-
-/* Number of Regions. */
-      new->nreg = i;
-
-
-/* BadVal. */
-/* ------- */
-      new->badval = astReadDouble( channel, "badval", AST__BAD );
-
-/* If an error occurred, clean up by deleting the new SelectorMap. */
-      if ( !astOK ) new = astDelete( new );
-   }
-
-/* Return the new SelectorMap pointer. */
-   return new;
-}
-
-/* Virtual function interfaces. */
-/* ============================ */
-/* These provide the external interface to the virtual functions defined by
-   this class. Each simply checks the global error status and then locates and
-   executes the appropriate member function, using the function pointer stored
-   in the object's virtual function table (this pointer is located using the
-   astMEMBER macro defined in "object.h").
-
-   Note that the member function may not be the one defined here, as it may
-   have been over-ridden by a derived class. However, it should still have the
-   same interface. */
-
-/* None. */
-
-
-
-