update ast 8.6.2

1 files changed, 0 insertions, 2875 deletions

diff --git a/ast/switchmap.c b/ast/switchmap.c
deleted file mode 100644
index 23dec4b..0000000
--- a/ast/switchmap.c
+++ /dev/null
@@ -1,2875 +0,0 @@
-/*
-*class++
-*  Name:
-*     SwitchMap
-
-*  Purpose:
-*     A Mapping that encapsulates a set of alternate Mappings.
-
-*  Constructor Function:
-c     astSwitchMap
-f     AST_SWITCHMAP
-
-*  Description:
-*     A SwitchMap is a Mapping which represents a set of alternate
-*     Mappings, each of which is used to transform positions within a
-*     particular region of the input or output coordinate system of the
-*     SwitchMap.
-*
-*     A SwitchMap can encapsulate any number of Mappings, but they must
-*     all have the same number of inputs (Nin attribute value) and the
-*     same number of outputs (Nout attribute value). The SwitchMap itself
-*     inherits these same values for its Nin and Nout attributes. Each of
-*     these Mappings represents a "route" through the switch, and are
-*     referred to as "route" Mappings below. Each route Mapping transforms
-*     positions between the input and output coordinate space of the entire
-*     SwitchMap, but only one Mapping will be used to transform any given
-*     position. The selection of the appropriate route Mapping to use with
-*     any given input position is made by another Mapping, called the
-*     "selector" Mapping. Each SwitchMap encapsulates two selector
-*     Mappings in addition to its route Mappings; one for use with the
-*     SwitchMap's forward transformation (called the "forward selector
-*     Mapping"), and one for use with the SwitchMap's inverse transformation
-*     (called the "inverse selector Mapping"). The forward selector Mapping
-*     must have the same number of inputs as the route Mappings, but
-*     should have only one output. Likewise, the inverse selector Mapping
-*     must have the same number of outputs as the route Mappings, but
-*     should have only one input.
-*
-*     When the SwitchMap is used to transform a position in the forward
-*     direction (from input to output), each supplied input position is
-*     first transformed by the forward transformation of the forward selector
-*     Mapping. This produces a single output value for each input position
-*     referred to as the selector value. The nearest integer to the selector
-*     value is found, and is used to index the array of route Mappings (the
-*     first supplied route Mapping has index 1, the second route Mapping has
-*     index 2, etc). If the nearest integer to the selector value is less
-*     than 1 or greater than the number of route Mappings, then the SwitchMap
-*     output position is set to a value of AST__BAD on every axis. Otherwise,
-*     the forward transformation of the selected route Mapping is used to
-*     transform the supplied input position to produce the SwitchMap output
-*     position.
-*
-*     When the SwitchMap is used to transform a position in the inverse
-*     direction (from "output" to "input"), each supplied "output" position
-*     is first transformed by the inverse transformation of the inverse
-*     selector Mapping. This produces a selector value for each "output"
-*     position. Again, the nearest integer to the selector value is found,
-*     and is used to index the array of route Mappings. If this selector
-*     index value is within the bounds of the array of route Mappings, then
-*     the inverse transformation of the selected route Mapping is used to
-*     transform the supplied "output" position to produce the SwitchMap
-*     "input" position. If the selector index value is outside the bounds
-*     of the array of route Mappings, then the SwitchMap "input" position is
-*     set to a value of AST__BAD on every axis.
-*
-*     In practice, appropriate selector Mappings should be chosen to
-*     associate a different route Mapping with each region of coordinate
-*     space. Note that the SelectorMap class of Mapping is particularly
-*     appropriate for this purpose.
-*
-*     If a compound Mapping contains a SwitchMap in series with its own
-*     inverse, the combination of the two adjacent SwitchMaps will be
-*     replaced by a UnitMap when the compound Mapping is simplified using
-c     astSimplify.
-f     AST_SIMPLIFY.
-
-*  Inheritance:
-*     The SwitchMap class inherits from the Mapping class.
-
-*  Attributes:
-*     The SwitchMap class does not define any new attributes beyond those
-*     which are applicable to all Mappings.
-
-*  Functions:
-c     The SwitchMap class does not define any new functions beyond those
-f     The SwitchMap 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:
-*     13-MAR-2006 (DSB):
-*        Original version.
-*     17-MAR-2006 (DSB):
-*        Guard against AST__BAD selector values.
-*     9-MAY-2006 (DSB):
-*        Check selector Mapping pointers are not NULL before calling
-*        astEqual in Equal.
-*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 SwitchMap
-
-/* 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 "switchmap.h"           /* Interface definition for this class */
-#include "frame.h"               /* Frames */
-
-/* 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(SwitchMap)
-
-/* Define macros for accessing each item of thread specific global data. */
-#define class_init astGLOBAL(SwitchMap,Class_Init)
-#define class_vtab astGLOBAL(SwitchMap,Class_Vtab)
-
-
-#include <pthread.h>
-
-
-#else
-
-
-/* Define the class virtual function table and its initialisation flag
-   as static variables. */
-static AstSwitchMapVtab 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. */
-AstSwitchMap *astSwitchMapId_( void *, void *, int, void **, const char *, ... );
-
-/* Prototypes for Private Member Functions. */
-/* ======================================== */
-static AstMapping *RemoveRegions( AstMapping *, int * );
-static AstPointSet *Transform( AstMapping *, AstPointSet *, int, AstPointSet *, int * );
-static double Rate( AstMapping *, double *, int, int, 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 * );
-static AstMapping *GetSelector( AstSwitchMap *, int, int *, int * );
-static AstMapping *GetRoute( AstSwitchMap *, double, int *, 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 SwitchMaps are equivalent.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     int Equal( AstObject *this, AstObject *that, int *status )
-
-*  Class Membership:
-*     SwitchMap 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 SwitchMaps are equivalent.
-
-*  Parameters:
-*     this
-*        Pointer to the first Object (a SwitchMap).
-*     that
-*        Pointer to the second Object.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     One if the SwitchMaps 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: */
-   AstMapping *fsmap1;
-   AstMapping *fsmap2;
-   AstMapping *ismap1;
-   AstMapping *ismap2;
-   AstMapping *rmap1;
-   AstMapping *rmap2;
-   AstSwitchMap *that;
-   AstSwitchMap *this;
-   int fsinv1;
-   int fsinv2;
-   int isinv1;
-   int i;
-   int isinv2;
-   int nroute;
-   int result;
-   int rinv1;
-   int rinv2;
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain pointers to the two SwitchMap structures. */
-   this = (AstSwitchMap *) this_object;
-   that = (AstSwitchMap *) that_object;
-
-/* Check the second object is a SwitchMap. We know the first is a
-   SwitchMap since we have arrived at this implementation of the virtual
-   function. */
-   if( astIsASwitchMap( that ) ) {
-
-/* Check they have the same number of route mappings. */
-      nroute = this->nroute;
-      if( that->nroute == nroute ) {
-
-/* Get the forward selector Mappings from the two SwitchMaps. */
-         fsmap1 = GetSelector( this, 1, &fsinv1, status );
-         fsmap2 = GetSelector( that, 1, &fsinv2, status );
-
-/* Are they equal? */
-         if( ( !fsmap1 && !fsmap2 ) ||
-             ( fsmap1 && fsmap2 && astEqual( fsmap1, fsmap2 ) ) ) {
-
-/* Get the inverse selector Mappings from the two SwitchMaps. */
-            ismap1 = GetSelector( this, 0, &isinv1, status );
-            ismap2 = GetSelector( that, 0, &isinv2, status );
-
-/* Are they equal? */
-            if( ( !ismap1 && !ismap2 ) ||
-                ( ismap1 && ismap2 && astEqual( ismap1, ismap2 ) ) ) {
-
-/* Loop over the route mappings, breaking as soon as two unequal route
-   Mappings are found. Re-instate the original values for the route
-   Mapping Invert flag after testing the route Mappings for equality. */
-               result = 1;
-               for( i = 0; result && i < nroute; i++ ) {
-                  rmap1 = GetRoute( this, (double) ( i + 1 ), &rinv1, status );
-                  rmap2 = GetRoute( that, (double) ( i + 1 ), &rinv2, status );
-                  if( !astEqual( rmap1, rmap2 ) ) result = 0;
-                  astSetInvert( rmap2, rinv2 );
-                  astSetInvert( rmap1, rinv1 );
-               }
-            }
-
-/* Reinstate the invert flags for the inverse selector Mappings. Ensure
-   this is done in the opposite order to which the selector Mappings were
-   obtained (in case they are in fact the same Mapping). */
-            if( ismap2 ) astSetInvert( ismap2, isinv2 );
-            if( ismap1 ) astSetInvert( ismap1, isinv1 );
-         }
-
-/* Reinstate the invert flags for the forward selector Mappings. Ensure
-   this is done in the oppsote order to which the selector Mappings were
-   obtained (in case they are in fact the same Mapping). */
-         if( fsmap2 ) astSetInvert( fsmap2, fsinv2 );
-         if( fsmap1 ) astSetInvert( fsmap1, fsinv1 );
-      }
-   }
-
-/* 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 "switchmap.h"
-*     int GetObjSize( AstObject *this, int *status )
-
-*  Class Membership:
-*     SwitchMap member function (over-rides the astGetObjSize protected
-*     method inherited from the parent class).
-
-*  Description:
-*     This function returns the in-memory size of the supplied SwitchMap,
-*     in bytes.
-
-*  Parameters:
-*     this
-*        Pointer to the SwitchMap.
-*     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: */
-   AstSwitchMap *this;
-   int i;
-   int result;
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointers to the SwitchMap structure. */
-   this = (AstSwitchMap *) 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 );
-
-   result += astGetObjSize( this->fsmap );
-   result += astGetObjSize( this->ismap );
-
-   for( i = 0; i < this->nroute; i++ ) {
-      result += astGetObjSize( this->routemap[ i ] );
-   }
-
-   result += astGetObjSize( this->routeinv );
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = 0;
-
-/* Return the result, */
-   return result;
-}
-
-static AstMapping *GetRoute( AstSwitchMap *this, double sel, int *inv, int *status ){
-/*
-*  Name:
-*     GetRoute
-
-*  Purpose:
-*     Return a pointer to a route Mapping, handling all Invert flags.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     AstMapping *GetRoute( AstSwitchMap *this, double sel, int *inv, int *status )
-
-*  Class Membership:
-*     SwitchMap method.
-
-*  Description:
-*     This function returns a pointer to a route Mapping (specified by a
-*     floating point selector value) for the given SwitchMap, taking account
-*     of the state of the Invert flag of both the route Mapping and the
-*     SwitchMap.
-
-*  Parameters:
-*     this
-*        Pointer to the SwitchMap.
-*     sel
-*        The selector value. The nearest integer value (minus 1) is used
-*        to index the array of route Mappings stored in the SwitchMap. A
-*        NULL pointer is returned if the selector value is out of range.
-*     inv
-*        Pointer to an int in which to return the original value of the
-*        Invert flag of the returned Mapping. The astSetInvert method
-*        should be used to re-instate this value once all use of the Mapping
-*        has been completed.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returns:
-*     A pointer to the route Mapping to use. Note, the returned pointer
-*     should NOT be annulled when no longer needed. NULL is returned
-*     (without error) if the SwitchMap does not have a route Mapping for the
-*     requested selector value. The forward transformation of the
-*     returned Mapping will implenment the forward transformation of the
-*     required route Mapping (and vice-versa).
-
-*/
-
-/* Local Variables: */
-   AstMapping *ret;
-   int rindex;
-
-/* Initialise */
-   ret = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return ret;
-
-/* Check selector value is good. */
-   if( sel != AST__BAD ) {
-
-/* Convert the supplied floating point selector value into an integer
-   index into the array of route Mappings held in the supplied SwitchMap. */
-      rindex = (int)( sel + 0.5 ) - 1;
-
-/* Return the null pointer if the index is out of range. */
-      if( rindex >= 0 && rindex < this->nroute ) {
-
-/* Get the required route Mapping. */
-         ret = ( this->routemap )[ rindex ];
-
-/* Return its original invert flag. */
-         *inv = astGetInvert( ret );
-
-/* Set the Invert flag back to the value it had when the SwitchMap was
-   created. */
-         astSetInvert( ret, this->routeinv[ rindex ] );
-
-/* If the SwitchMap has since been inverted, also invert the returned
-   route Mapping, so that the forward transformation of the returned
-   Mapping implements the forward transformation of the supplied
-   SwitchMap (and vice-versa). */
-         if( astGetInvert( this ) ) astInvert( ret );
-      }
-   }
-
-/* Return the pointer. */
-   return ret;
-
-}
-
-static AstMapping *GetSelector( AstSwitchMap *this, int fwd, int *inv, int *status ){
-/*
-*  Name:
-*     GetSelector
-
-*  Purpose:
-*     Return a pointer to a selector Mapping, handling all Invert flags.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     AstMapping *GetSelector( AstSwitchMap *this, int fwd, int *inv, int *status )
-
-*  Class Membership:
-*     SwitchMap method.
-
-*  Description:
-*     This function returns a pointer to either the forward or inverse
-*     selector Mapping for the given SwitchMap, taking account of the
-*     state of the Invert flag of bothe the selector Mapping and the
-*     SwitchMap.
-
-*  Parameters:
-*     this
-*        Pointer to the SwitchMap.
-*     fwd
-*        If non-zero, return the forward selector Mapping. Otherwise,
-*        return the inverse selector Mapping.
-*     inv
-*        Pointer to an int in which to return the original value of the
-*        Invert flag of the returned Mapping. The astSetInvert method
-*        should be used to re-instate this value once all use of the Mapping
-*        has been completed.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returns:
-*     A pointer to the selector Mapping to use. Note, the returned pointer
-*     should NOT be annulled when no longer needed. NULL is returned
-*     (without error) if the SwitchMap does not have a Mapping for the
-*     requested selector.
-
-*/
-
-/* Local Variables: */
-   AstMapping *ret;
-   int swinv;
-
-/* Initialise */
-   ret = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return ret;
-
-/* See if the SwitchMap has been inverted. */
-   swinv = astGetInvert( this );
-
-/* If the SwitchMap has been inverted, the forward and inverse selector
-   Mappings should be reversed. */
-   if( ( !swinv && !fwd ) || ( swinv && fwd ) ){
-      ret = this->ismap;
-      if( ret ) {
-         *inv = astGetInvert( ret );
-         astSetInvert( ret, this->isinv );
-      }
-
-   } else {
-      ret = this->fsmap;
-      if( ret ) {
-         *inv = astGetInvert( ret );
-         astSetInvert( ret, this->fsinv );
-      }
-   }
-
-   if( ret && swinv ) astInvert( ret );
-
-/* Return the pointer. */
-   return ret;
-
-}
-
-void astInitSwitchMapVtab_(  AstSwitchMapVtab *vtab, const char *name, int *status ) {
-/*
-*+
-*  Name:
-*     astInitSwitchMapVtab
-
-*  Purpose:
-*     Initialise a virtual function table for a SwitchMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     void astInitSwitchMapVtab( AstSwitchMapVtab *vtab, const char *name )
-
-*  Class Membership:
-*     SwitchMap vtab initialiser.
-
-*  Description:
-*     This function initialises the component of a virtual function
-*     table which is used by the SwitchMap 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 astIsASwitchMap) 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;
-   mapping->Rate = Rate;
-   mapping->RemoveRegions = RemoveRegions;
-
-/* Declare the copy constructor, destructor and class dump function. */
-   astSetCopy( vtab, Copy );
-   astSetDelete( vtab, Delete );
-   astSetDump( vtab, Dump, "SwitchMap", "Alternate regionalised 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:
-*     SwitchMap 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: */
-   AstSwitchMap *this;       /* Pointer to SwitchMap 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 SwitchMap structure. */
-   this = (AstSwitchMap *) 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. */
-   if( !result ) result = astManageLock( this->fsmap, mode, extra, fail );
-   if( !result ) result = astManageLock( this->ismap, mode, extra, fail );
-   for( i = 0; i < this->nroute; i++ ) {
-      if( !result ) result = astManageLock( this->routemap[ 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 SwitchMap.
-
-*  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:
-*     SwitchMap 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 SwitchMap 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 SwitchMap 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 SwitchMap which is to be merged with
-*        its neighbours. This should be a cloned copy of the SwitchMap
-*        pointer contained in the array element "(*map_list)[where]"
-*        (see below). This pointer will not be annulled, and the
-*        SwitchMap it identifies will not be modified by this function.
-*     where
-*        Index in the "*map_list" array (below) at which the pointer
-*        to the nominated SwitchMap 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: */
-   AstSwitchMap *map;
-   AstMapping *new;
-   int i;
-   int nroute;
-   int result;
-   int fsinv_old;
-   int isinv_old;
-   int *rinv_old;
-   AstMapping *sfsmap;
-   AstMapping *sismap;
-   int simp;
-   AstMapping **srmap;
-   AstSwitchMap *swneb;
-   int ilo;
-   int equal;
-
-/* Initialise.*/
-   result = -1;
-
-/* Check the inherited status. */
-   if ( !astOK ) return result;
-
-/* Get a pointer to this SwitchMap, and note the number of route Mappings. */
-   map = (AstSwitchMap *) this;
-   nroute = map->nroute;
-
-/* Temporarily put the Invert flag of all encapsulated Mappings (both
-   route and selector) back to the values they had when the SwitchMap was
-   created, noting their current values so that they can be re-instated
-   later. If the SwitchMap itself has been inverted, swap all the original
-   invert flags. */
-   if( map->fsmap ) {
-      fsinv_old = astGetInvert( map->fsmap );
-      astSetInvert( map->fsmap, map->fsinv );
-   } else {
-      fsinv_old = 0;
-   }
-
-   if( map->ismap ) {
-      isinv_old = astGetInvert( map->ismap );
-      astSetInvert( map->ismap, map->isinv );
-   } else {
-      isinv_old = 0;
-   }
-
-   rinv_old = astMalloc( sizeof( int )*nroute );
-   if( astOK ) {
-      for( i = 0; i < nroute; i++ ) {
-         rinv_old[ i ] = astGetInvert( map->routemap[ i ] );
-         astSetInvert( map->routemap[ i ], map->routeinv[ i ] );
-      }
-   }
-
-/* If possible, merge the SwitchMap with a neighbouring SwitchMap. */
-/* =============================================================== */
-/* Only do this if we are combining the Mappings in series. */
-   if( series ) {
-
-/* Is the higher neighbour a SwitchMap? If so get a pointer to it, and
-   note the index of the lower of the two adjacent SwitchMaps. */
-      if( where < ( *nmap - 1 ) &&
-          astIsASwitchMap( ( *map_list )[ where + 1 ] ) ){
-         swneb = (AstSwitchMap *) ( *map_list )[ where + 1 ];
-         ilo = where;
-
-/* If not, is the lower neighbour a SwitchMap? If so get a pointer to it, and
-   note the index of the lower of the two adjacent SwitchMaps. */
-      } else if( where > 0 &&
-                 astIsASwitchMap( ( *map_list )[ where - 1 ] ) ){
-         swneb = (AstSwitchMap *) ( *map_list )[ where - 1 ];
-         ilo =  where - 1;
-
-      } else {
-         swneb = NULL;
-      }
-
-/* If a neighbouring SwitchMap was found, we can replace the pair by a
-   UnitMap if the two SwitchMaps are equal but have opposite values for
-   their Invert flags. Temporarily invert the neighbour, then compare
-   the two SwitchMaps for equality, then re-invert the neighbour. */
-      if( swneb ) {
-         astInvert( swneb );
-         equal = astEqual( map, swneb );
-         astInvert( swneb );
-
-/* If the two SwitchMaps 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;
-         }
-      }
-   }
-
-/* Attempt to simplify the SwitchMap on its own. */
-/* ============================================= */
-/* Only do this if no change was made above. */
-   if( result == -1 ) {
-
-/* If the SwitchMap is inverted, create an equal SwitchMap which is not
-   inverted. To do this, invert and swap the selector Mappings, and
-   invert all the route Mappings. We use astSetInvert rather than astInvert
-   because two or more more stored pointers may point to the same Mapping
-   in which case that Mapping would be inverted more than once with
-   unpredictable results. */
-      if( ( *invert_list )[ where ] ) {
-         if( map->fsmap ) astSetInvert( map->fsmap, !(map->fsinv) );
-         if( map->ismap ) astSetInvert( map->ismap, !(map->isinv) );
-         for( i = 0; i < nroute; i++ ) {
-            astSetInvert( map->routemap[ i ], !(map->routeinv[ i ]) );
-         }
-
-         new = (AstMapping *) astSwitchMap( map->ismap, map->fsmap, nroute, (void **) map->routemap, "", status );
-
-         (void) astAnnul( ( *map_list )[ where ] );
-         ( *map_list )[ where ] = (AstMapping *) new;
-         ( *invert_list )[ where ] = 0;
-         result = where;
-
-/* Otherwise, try to simplify each of the encapsulated Mappings, noting
-   if any simplification takes place. */
-      } else {
-         sfsmap = ( map->fsmap ) ? astSimplify( map->fsmap ) : NULL;
-         sismap = ( map->ismap ) ? astSimplify( map->ismap ) : NULL;
-         simp = ( sfsmap != map->fsmap ) || ( sismap != map->ismap );
-
-         srmap = astMalloc( sizeof( AstMapping * )*nroute );
-         if( astOK ) {
-            for( i = 0; i < nroute; i++ ) {
-               srmap[ i ] = astSimplify( map->routemap[ i ] );
-               simp = simp || ( srmap[ i ] != map->routemap[ i ] );
-            }
-         }
-
-/* If any simplification took place, construct a new SwitchMap from these
-    simplified Mappings. */
-         if( simp ) {
-            (void) astAnnul( ( *map_list )[ where ] );
-            ( *map_list )[ where ] = (AstMapping *) astSwitchMap( sfsmap, sismap,
-                                                    nroute, (void **) srmap, "", status );
-            result = where;
-         }
-
-/* Release resources. */
-         if( sfsmap ) sfsmap = astAnnul( sfsmap );
-         if( sismap ) sismap = astAnnul( sismap );
-         if( srmap ) {
-            for( i = 0; i < nroute; i++ ) srmap[ i ] = astAnnul( srmap[ i ] );
-            srmap = astFree( srmap );
-         }
-      }
-   }
-
-/* Re-instate the original Invert values for the encapsulated Mappings. */
-   if( map->fsmap ) astSetInvert( map->fsmap, fsinv_old );
-   if( map->ismap ) astSetInvert( map->ismap, isinv_old );
-   if( rinv_old ) {
-      for( i = 0; i < nroute; i++ ) {
-         astSetInvert( map->routemap[ i ], rinv_old[ i ] );
-      }
-      rinv_old = astFree( rinv_old );
-   }
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = -1;
-
-/* Return the result. */
-   return result;
-}
-
-static double Rate( AstMapping *this, double *at, int ax1, int ax2, int *status ){
-/*
-*  Name:
-*     Rate
-
-*  Purpose:
-*     Calculate the rate of change of a Mapping output.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     result = Rate( AstMapping *this, double *at, int ax1, int ax2, int *status )
-
-*  Class Membership:
-*     SwitchMap member function (overrides the astRate method inherited
-*     from the Mapping class ).
-
-*  Description:
-*     This function returns the rate of change of a specified output of
-*     the supplied Mapping with respect to a specified input, at a
-*     specified input position. Also evaluates the second derivative.
-
-*  Parameters:
-*     this
-*        Pointer to the Mapping to be applied.
-*     at
-*        The address of an array holding the axis values at the position
-*        at which the rate of change is to be evaluated. The number of
-*        elements in this array should equal the number of inputs to the
-*        Mapping.
-*     ax1
-*        The index of the Mapping output for which the rate of change is to
-*        be found (output numbering starts at 0 for the first output).
-*     ax2
-*        The index of the Mapping input which is to be varied in order to
-*        find the rate of change (input numbering starts at 0 for the first
-*        input).
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     The rate of change of Mapping output "ax1" with respect to input
-*     "ax2", evaluated at "at", or AST__BAD if the value cannot be
-*     calculated.
-
-*/
-
-/* Local Variables: */
-   AstSwitchMap *map;
-   AstMapping *smap;
-   AstMapping *rmap;
-   double result;
-   double sel;
-   int fsinv;
-   int rinv;
-   int nin;
-
-/* Initialise. */
-   result = AST__BAD;
-
-/* Check inherited status */
-   if( !astOK ) return result;
-
-/* Get a pointer to the SwitchMap structure. */
-   map = (AstSwitchMap *) this;
-
-/* Get a pointer to the effective foward selector Mapping, and its current
-   invert flag (this takes account of whether the SwtichMap has been
-   inverted or not). This call resets the selector's invert flag temporarily
-   back to the value it had when the SwitchMap was created. */
-   smap = GetSelector( map, 1, &fsinv, status );
-
-/* If the SwitchMap has no forward selector Mapping, return AST__BAD. */
-   if( smap ) {
-
-/* Get the number of inputs */
-      nin = astGetNin( smap );
-
-/* Transform the supplied position using the selector Mapping. The output
-   value is the selector value that indicates which route Mapping to use. */
-      astTranN( smap, 1, nin, 1, at, 1, 1, 1, &sel );
-
-/* Get the index of the route Mapping to use, and check it is valid (if
-   not, return AST__BAD if not). This takes account of whether the
-   SwitchMap has been inverted, and also temporarily re-instates the
-   original value of the route Mapping's Invert flag . */
-      rmap = GetRoute( map, sel, &rinv, status );
-      if( rmap ) {
-
-/* Use the astRate method of the route Mapping. */
-         result = astRate( rmap, at, ax1, ax2 );
-
-/* Reset the Invert flag for the route Mapping. */
-         astSetInvert( rmap, rinv );
-      }
-
-/* Reset the Invert flag for the selector Mapping. */
-      astSetInvert( smap, fsinv );
-   }
-
-/* Return the result. */
-   return result;
-}
-
-static AstMapping *RemoveRegions( AstMapping *this_mapping, int *status ) {
-/*
-*  Name:
-*     RemoveRegions
-
-*  Purpose:
-*     Remove any Regions from a Mapping.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     AstMapping *RemoveRegions( AstMapping *this, int *status )
-
-*  Class Membership:
-*     SwitchMap method (over-rides the astRemoveRegions method inherited
-*     from the Mapping class).
-
-*  Description:
-*     This function searches the supplied Mapping (which may be a
-*     compound Mapping such as a SwitchMap) for any component Mappings
-*     that are instances of the AST Region class. It then creates a new
-*     Mapping from which all Regions have been removed. If a Region
-*     cannot simply be removed (for instance, if it is a component of a
-*     parallel SwitchMap), then it is replaced with an equivalent UnitMap
-*     in the returned Mapping.
-*
-*     The implementation provided by the SwitchMap class invokes the
-*     astRemoveRegions method on all the component Mappings, and joins
-*     the results together into a new SwitchMap.
-
-*  Parameters:
-*     this
-*        Pointer to the original Region.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     A pointer to the modified mapping.
-
-*  Notes:
-*     - A NULL pointer value will be returned if this function is
-*     invoked with the AST error status set, or if it should fail for
-*     any reason.
-*/
-
-/* Local Variables: */
-   AstMapping **temp;            /* Array of new route Mappings */
-   AstMapping *newfsmap;         /* New forward selector Mapping */
-   AstMapping *newismap;         /* New inverse selector Mapping */
-   AstMapping *result;           /* Result pointer to return */
-   AstSwitchMap *new;            /* Pointer to new SwitchMap */
-   AstSwitchMap *this;           /* Pointer to SwitchMap structure */
-   int changed;                  /* Has any mapping been changed? */
-   int i;                        /* Loop count */
-   int nax;                      /* Number of Frame axes */
-
-/* Initialise. */
-   result = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Get a pointer to the SwitchMap. */
-   this = (AstSwitchMap *) this_mapping;
-
-/* Allocate an array to hold the modified Mapping pointers. */
-   temp = astMalloc( sizeof( AstMapping *)*( this->nroute ) );
-   if( astOK ) {
-
-/* Invoke the astRemoveRegions method on all the component Mappings. */
-      changed = 0;
-      for( i = 0; i < this->nroute; i++ ) {
-         temp[ i ] = astRemoveRegions( this->routemap[ i ] );
-
-/* Note if any Mapping was changed. */
-         if( temp[ i ] != this->routemap[ i ] ) {
-            changed = 1;
-
-/* The implementation of the astRemoveRegions method provided by the
-   Region class returns a Frame rather than a UnitMap. But we need
-   Mappings here, not Frames. So if the new Mapping is a Frame, replace
-   it with an equivalent UnitMap. */
-            if( astIsAFrame( temp[ i ] ) ) {
-               nax = astGetNin( temp[ i ] );
-               (void) astAnnul( temp[ i ] );
-               temp[ i ] = (AstMapping *) astUnitMap( nax, " ", status );
-            }
-         }
-      }
-
-/* And on the other ancillary Mappings */
-      if( this->fsmap ) {
-         newfsmap = astRemoveRegions( this->fsmap );
-         if( newfsmap != this->fsmap ) {
-            changed = 1;
-            if( astIsAFrame( newfsmap ) ) {
-               nax = astGetNin( newfsmap );
-               (void) astAnnul( newfsmap );
-               newfsmap = (AstMapping *) astUnitMap( nax, " ", status );
-            }
-         }
-
-      } else {
-         newfsmap = NULL;
-      }
-
-      if( this->ismap ) {
-         newismap = astRemoveRegions( this->ismap );
-         if( newismap != this->ismap ) {
-            changed = 1;
-            if( astIsAFrame( newismap ) ) {
-               nax = astGetNin( newismap );
-               (void) astAnnul( newismap );
-               newismap = (AstMapping *) astUnitMap( nax, " ", status );
-            }
-         }
-
-      } else {
-         newismap = NULL;
-      }
-
-/* If no component was modified, just return a clone of the supplied
-   pointer. */
-      if( ! changed ) {
-         result = astClone( this );
-
-/* Otherwise, we need to create a new Mapping to return. We take a deep
-   copy of the supplied SwitchMap and then modify the Mappings so that
-   we retain any extra information in the supplied SwitchMap. */
-      } else {
-         new = astCopy( this );
-
-         for( i = 0; i < this->nroute; i++ ) {
-            (void) astAnnul( new->routemap[ i ] );
-            new->routemap[ i ] = astClone( temp[ i ] );
-         }
-
-         if( newfsmap ) {
-            (void) astAnnul( new->fsmap );
-            new->fsmap = astClone( newfsmap );
-         }
-
-         if( newismap ) {
-            (void) astAnnul( new->ismap );
-            new->ismap = astClone( newismap );
-         }
-
-         result = (AstMapping *) new;
-      }
-
-/* Free resources. */
-      for( i = 0; i < this->nroute; i++ ) {
-         temp[ i ] = astAnnul( temp[ i ] );
-      }
-
-      if( newfsmap ) newfsmap = astAnnul( newfsmap );
-      if( newismap ) newismap = astAnnul( newismap );
-   }
-
-   temp = astFree( temp );
-
-/* Annul the returned Mapping if an error has occurred. */
-   if( !astOK ) result = astAnnul( result );
-
-/* Return the result. */
-   return result;
-}
-
-int astSwitchList_( AstSwitchMap *this, int invert, int *nmap,
-                    AstMapping ***map_list, int **invert_list, int *status ) {
-/*
-*+
-*  Name:
-*     astSwitchList
-
-*  Purpose:
-*     Extract the selector and route Mappings from a SwitchMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     int astSwitchList( AstSwitchMap *this, int invert, int *nmap,
-*                        AstMapping ***map_list, int **invert_list )
-
-*  Class Membership:
-*     SwitchMap member function.
-
-*  Description:
-*     This function extracts the route and selector Mappings form a
-*     SwitchMap.
-
-*  Parameters:
-*     this
-*        Pointer to the SwitchMap to be decomposed (it is not actually
-*        modified by this function).
-*     invert
-*        The value to which the SwitchMap's Invert attribute is to be
-*        (notionally) set before performing the decomposition. Normally,
-*        the value supplied here will be the actual Invert value obtained
-*        from the SwitchMap (e.g. using astGetInvert).  Sometimes, however,
-*        when a SwitchMap is encapsulated within another structure, that
-*        structure may retain an Invert value (in order to prevent external
-*        interference) which should be used instead.
-*
-*        Note that the actual Invert value of the SwitchMap supplied is
-*        not used (or modified) by this function.
-*     nmap
-*        The address of an int in which to return a count of the number of
-*        individual Mappings in the decomposition. The supplied value is
-*        ignored.
-*     map_list
-*        Address of a pointer to an array of Mapping pointers. The value
-*        supplied on entry is ignored. On exit, it points at a dynamically
-*        allocated array containing Mapping pointers ("*nmap" in number) that
-*        result from the decomposition requested.
-*
-*        The returned Mapping pointers returned will identify the following
-*        sequence of Mappings; forward selector mapping (or NULL if the
-*        SwitchMap has no forward selector Mapping), inverse selector
-*        mapping (or NULL if the SwitchMap has no inverse selector Mapping),
-*        the route Mappings in the order they were supplied when the
-*        SwitchMap was constructed.
-*
-*        All the Mapping pointers returned by this function should be
-*        annulled by the caller, using astAnnul, when no longer
-*        required. The dynamic array holding these pointers should
-*        also be freed, using astFree.
-*     invert_list
-*        Address of a pointer to an array of int. The value supplied on
-*        entry is ignored. On exit, it points at a dynamically allocated
-*        array containing Invert attribute values ("*nmap" in number) that
-*        result from the decomposition requested.
-*
-*        The returned Invert values returned identify the values which must
-*        be assigned to the Invert attributes of the corresponding
-*        Mappings (whose pointers are in the "*map_list" array) before
-*        they are applied. Note that these values may differ from the
-*        actual Invert attribute values of these Mappings, which are
-*        not relevant.
-*
-*        The dynamic array holding these values should be freed by the
-*        caller, using astFree, when no longer required.
-
-*  Returned Value:
-*     The number of route Mappings stored in the SwitchMap.
-
-*  Notes:
-*     - It is unspecified to what extent the original SwitchMap and the
-*     individual (decomposed) Mappings are inter-dependent. Consequently,
-*     the individual Mappings cannot be modified without risking
-*     modification of the original SwitchMap.
-*     - If this function is invoked with the global error status set,
-*     or if it should fail for any reason, then the *nmap value, the
-*     list of Mapping pointers and the list of Invert values will all
-*     be returned unchanged.
-*-
-*/
-
-/* Local Variables: */
-   AstMapping *map;              /* Pointer to Mapping to return */
-   int inv;                      /* Original Invert flag for Mapping */
-   int i;                        /* Route Mapping index */
-   int oldinv;                   /* Original Invert flag for SwitchMap */
-   int result;                   /* Returned value */
-
-/* Check the global error status. */
-   if ( !astOK ) return 0;
-
-/* Store the numbe of route Mappings */
-   result = this->nroute;
-   *nmap = result + 2;
-
-/* Allocate the required arrays. */
-   *map_list = astMalloc( sizeof( AstMapping * )*(size_t) *nmap );
-   *invert_list = astMalloc( sizeof( int )*(size_t) *nmap );
-
-/* Check the pointers can be used safely. */
-   if( astOK ) {
-
-/* Temporaily set the requested Invert flag for the SwitchMap. */
-      oldinv = astGetInvert( this );
-      astSetInvert( this, invert );
-
-/* Get the forward selector Mapping. */
-      map = GetSelector( this, 1, &inv, status );
-
-/* If the SwitchMap has a forward selector Mapping, return a clone of the
-   Mapping pointer, and the invert flag to be used with it, then
-   re-instate the original invert flag value (which was modified by
-   GetSelector). */
-      if( map ) {
-         ( *map_list )[ 0 ] = astClone( map );
-         ( *invert_list )[ 0 ] = astGetInvert( map );
-         astSetInvert( map, inv );
-
-/* If the SwitchMap does not has a forward selector Mapping, return a
-   NULL pointer. */
-      } else {
-         ( *map_list )[ 0 ] = NULL;
-         ( *invert_list )[ 0 ] = 0;
-      }
-
-/* Likewise, get and return the inverse selector Mapping.*/
-      map = GetSelector( this, 0, &inv, status );
-      if( map ) {
-         ( *map_list )[ 1 ] = astClone( map );
-         ( *invert_list )[ 1 ] = astGetInvert( map );
-         astSetInvert( map, inv );
-      } else {
-         ( *map_list )[ 1 ] = NULL;
-         ( *invert_list )[ 1 ] = 0;
-      }
-
-/* Loop round all route Mappings. */
-      for( i = 0; i < result; i++ ){
-
-/* Get the next route Mapping. */
-         map = GetRoute( this, (double) i + 1.0, &inv, status );
-
-/* If the SwitchMap has a route Mapping for the current selector value,
-   return a clone of the Mapping pointer, and the invert flag to be used
-   with it, then re-instate the original invert flag value (which was
-   modified by GetRoute). */
-         if( map ) {
-            ( *map_list )[ i + 2 ] = astClone( map );
-            ( *invert_list )[ i + 2 ] = astGetInvert( map );
-            astSetInvert( map, inv );
-
-/* If the SwitchMap does not has a route Mapping for the current selector
-   value, return a NULL pointer. */
-         } else {
-            ( *map_list )[ i + 2 ] = NULL;
-            ( *invert_list )[ i + 2 ] = 0;
-         }
-
-      }
-
-/* Re-instate the original Ivert flag for the SwitchMap. */
-      astSetInvert( this, oldinv );
-
-   }
-
-/* If an error has occurred, free the returned arrays. */
-   if( !astOK ) {
-      *map_list = astFree( *map_list );
-      *invert_list= astFree( *invert_list );
-      result= 0;
-      *nmap = 0;
-   }
-
-/* Return the result */
-   return result;
-}
-
-static AstPointSet *Transform( AstMapping *this, AstPointSet *in,
-                               int forward, AstPointSet *out, int *status ) {
-/*
-*  Name:
-*     Transform
-
-*  Purpose:
-*     Apply a SwitchMap to transform a set of points.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     AstPointSet *Transform( AstMapping *this, AstPointSet *in,
-*                             int forward, AstPointSet *out, int *status )
-
-*  Class Membership:
-*     SwitchMap member function (over-rides the astTransform method inherited
-*     from the Mapping class).
-
-*  Description:
-*     This function takes a SwitchMap 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 SwitchMap's component Mappings in turn,
-*     either in series or in parallel.
-
-*  Parameters:
-*     this
-*        Pointer to the SwitchMap.
-*     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 SwitchMap 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: */
-   AstMapping *rmap;
-   AstMapping *selmap;
-   AstPointSet *ps1;
-   AstPointSet *ps1a;
-   AstPointSet *ps2;
-   AstPointSet *ps2a;
-   AstPointSet *result;
-   AstPointSet *selps;
-   AstSwitchMap *map;
-   double **in_ptr;
-   double **out_ptr;
-   double **ptr1;
-   double **ptr2;
-   double **sel_ptr;
-   double *outv;
-   double *sel;
-   int *popmap;
-   int iroute;
-   int ipoint;
-   int j;
-   int k;
-   int maxpop;
-   int ncin;
-   int ncout;
-   int npoint;
-   int nroute;
-   int rindex;
-   int rinv;
-   int selinv;
-   int totpop;
-
-/* Check the global error status. */
-   if ( !astOK ) return NULL;
-
-/* Obtain a pointer to the SwitchMap. */
-   map = (AstSwitchMap *) 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 SwitchMap to generate the output coordinate values. */
-
-/* Get the number of input and output coords. */
-   if( forward ) {
-      ncin = astGetNin( this );
-      ncout = astGetNout( this );
-   } else {
-      ncin = astGetNout( this );
-      ncout = astGetNin( this );
-   }
-
-/* Get the appropriate selector Mapping. */
-   selmap = GetSelector( map, forward, &selinv, status );
-
-/* Transform the supplied positions using the above selector Mapping. */
-   selps = astTransform( selmap, in, forward, NULL );
-
-/* Get a pointer to the array holding the selector value. */
-   sel_ptr = astGetPoints( selps );
-
-/* Get a pointer to the array holding the input values. */
-   in_ptr = astGetPoints( in );
-
-/* Get a pointer to the array in which to store the results, and the total
-   number of points being transformed. */
-   out_ptr = astGetPoints( result );
-   npoint = astGetNpoint( result );
-
-/* We now count how many positions are to be tranformed by each of the
-   route Mappings. */
-   nroute = map->nroute;
-   popmap = astMalloc( sizeof( int )*nroute );
-   if( astOK ) {
-      for( iroute = 0; iroute < nroute; iroute++ ) popmap[ iroute ] = 0;
-
-      sel = sel_ptr[ 0 ];
-      for( ipoint = 0; ipoint < npoint; ipoint++,sel++ ) {
-         if( *sel != AST__BAD ) {
-            rindex = (int)( *sel + 0.5 ) - 1;
-            if( rindex >= 0 && rindex < nroute ) ( popmap[ rindex ] )++;
-         }
-      }
-
-/* Find the number of points transformed by the most popular route Mapping.
-   Also find the total number of points transformed by any route Mapping. */
-      totpop = 0;
-      maxpop = 0;
-      for( iroute = 0; iroute < nroute; iroute++ ) {
-         if( popmap[ iroute ] > maxpop ) maxpop = popmap[ iroute ];
-         totpop += popmap[ iroute ];
-      }
-      if( maxpop == 0 ) maxpop = 1;
-
-/* If some of the points are not transformed by any route Mapping.
-   Initialise the whole output array to hold AST__BAD at every point. */
-      if( totpop < npoint ) {
-         for( j = 0; j < ncout; j++ ) {
-            outv = out_ptr[ j ];
-            for( ipoint = 0; ipoint < npoint; ipoint++ ) *(outv++) = AST__BAD;
-         }
-      }
-
-/* Create a PointSet large enough to hold all the supplied positions
-   which are to be transformed by the most popular route Mapping. */
-      ps1 = astPointSet( maxpop, ncin, "", status );
-      ptr1 = astGetPoints( ps1 );
-
-/* Create a PointSet large enough to hold all the output positions
-   created by the most popular route Mapping. */
-      ps2 = astPointSet( maxpop, ncout, "", status );
-      ptr2 = astGetPoints( ps2 );
-      if( astOK ) {
-
-/* Loop round each route Mapping which is used by at least 1 point. */
-         for( iroute = 0; iroute < nroute; iroute++ ) {
-            if( popmap[ iroute ] >0 ) {
-               rmap = GetRoute( map, (double)( iroute + 1 ), &rinv, status );
-
-/* Construct two PointSets of the correct size to hold the input and
-   output points to be processed with the current route Mapping. We
-   re-use the memory allocated for the largest route Mapping's PointSet. */
-               if( popmap[ iroute ] != maxpop ) {
-                  ps1a = astPointSet( popmap[ iroute ], ncin, "", status );
-                  astSetPoints( ps1a, ptr1 );
-                  ps2a = astPointSet( popmap[ iroute ], ncout, "", status );
-                  astSetPoints( ps2a, ptr2 );
-               } else {
-                  ps1a = astClone( ps1 );
-                  ps2a = astClone( ps2 );
-               }
-
-/* Fill the input PointSet with the input positions which are to be
-   transformed using the current route Mapping. */
-               sel = sel_ptr[ 0 ];
-               k = 0;
-               for( ipoint = 0; ipoint < npoint; ipoint++,sel++ ) {
-                  if( *sel != AST__BAD ) {
-                     rindex = (int)( *sel + 0.5 ) - 1;
-                     if( rindex == iroute ) {
-                        for( j = 0; j < ncin; j++ ) {
-                           ptr1[ j ][ k ] = in_ptr[ j ][ ipoint ];
-                        }
-                        k++;
-                     }
-                  }
-               }
-
-/* Use the route Mapping to transform this PointSet. */
-               (void) astTransform( rmap, ps1a, forward, ps2a );
-
-/* Copy the axis values from the resulting PointSet back into the results
-   array. */
-               sel = sel_ptr[ 0 ];
-               k = 0;
-               for( ipoint = 0; ipoint < npoint; ipoint++,sel++ ) {
-                  if( *sel != AST__BAD ) {
-                     rindex = (int)( *sel + 0.5 ) - 1;
-                     if( rindex == iroute ) {
-                        for( j = 0; j < ncout; j++ ) {
-                           out_ptr[ j ][ ipoint ] = ptr2[ j ][ k ];
-                        }
-                        k++;
-                     }
-                  }
-               }
-
-/* Free resources. */
-               ps1a = astAnnul( ps1a );
-               ps2a = astAnnul( ps2a );
-
-/* Re-instate the Invert flag for the route Mapping. */
-               astSetInvert( rmap, rinv );
-            }
-         }
-      }
-
-/* Free resources. */
-      ps1 = astAnnul( ps1 );
-      ps2 = astAnnul( ps2 );
-   }
-
-   selps = astAnnul( selps );
-   popmap = astFree( popmap );
-
-/* Re-instate the Invert flag of the selector Mapping. */
-   astSetInvert( selmap, selinv );
-
-/* 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 SwitchMap objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Copy( const AstObject *objin, AstObject *objout, int *status )
-
-*  Description:
-*     This function implements the copy constructor for SwitchMap 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 component
-*     Mappings within the SwitchMap.
-*/
-
-/* Local Variables: */
-   AstSwitchMap *in;                /* Pointer to input SwitchMap */
-   AstSwitchMap *out;               /* Pointer to output SwitchMap */
-   int i;                           /* Loop count */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain pointers to the input and output SwitchMaps. */
-   in = (AstSwitchMap *) objin;
-   out = (AstSwitchMap *) objout;
-
-/* For safety, start by clearing any references to the input component
-   Mappings,etc, from the output SwitchMap. */
-   out->fsmap = NULL;
-   out->ismap = NULL;
-   out->routemap = NULL;
-   out->routeinv = NULL;
-
-/* Make copies of these Mappings, etc, and store pointers to them in the output
-   SwitchMap structure. */
-   if( in->fsmap ) out->fsmap = astCopy( in->fsmap );
-   if( in->ismap ) out->ismap = astCopy( in->ismap );
-
-   out->routemap = astMalloc( sizeof( AstMapping * )*( in->nroute ) );
-   out->routeinv = astMalloc( sizeof( int )*( in->nroute ) );
-   if( astOK ) {
-      for( i = 0; i < in->nroute; i++ ) {
-         out->routemap[ i ] = astCopy( in->routemap[ i ] );
-         out->routeinv[ i ] = in->routeinv[ i ];
-      }
-   }
-
-}
-
-/* Destructor. */
-/* ----------- */
-static void Delete( AstObject *obj, int *status ) {
-/*
-*  Name:
-*     Delete
-
-*  Purpose:
-*     Destructor for SwitchMap objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Delete( AstObject *obj, int *status )
-
-*  Description:
-*     This function implements the destructor for SwitchMap 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: */
-   AstSwitchMap *this;              /* Pointer to SwitchMap */
-   int i;
-
-/* Obtain a pointer to the SwitchMap structure. */
-   this = (AstSwitchMap *) obj;
-
-/* Free dynamically allocated resources. */
-   if( this->fsmap ) this->fsmap = astAnnul( this->fsmap );
-   if( this->ismap ) this->ismap = astAnnul( this->ismap );
-   for( i = 0; i < this->nroute; i++ ) {
-      this->routemap[ i ] = astAnnul( this->routemap[ i ] );
-   }
-   this->routemap = astFree( this->routemap );
-   this->routeinv = astFree( this->routeinv );
-
-/* Clear the remaining SwitchMap variables. */
-   this->nroute = 0;
-   this->fsinv = 0;
-   this->isinv = 0;
-}
-
-/* Dump function. */
-/* -------------- */
-static void Dump( AstObject *this_object, AstChannel *channel, int *status ) {
-/*
-*  Name:
-*     Dump
-
-*  Purpose:
-*     Dump function for SwitchMap 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 SwitchMap class to an output Channel.
-
-*  Parameters:
-*     this
-*        Pointer to the SwitchMap 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: */
-   AstSwitchMap *this;
-   int ival;
-   int set;
-   int i;
-   char buf[ 20 ];
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain a pointer to the SwitchMap structure. */
-   this = (AstSwitchMap *) this_object;
-
-/* Write out values representing the instance variables for the SwitchMap
-   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. */
-
-/* Forward selector Mapping */
-/* ------------------------ */
-   if( this->fsmap ) {
-      astWriteObject( channel, "FSMap", 1, 1, this->fsmap,
-                      "Forward selector Mapping" );
-
-/* Forward selector Invert flag. */
-/* ----------------------------- */
-      ival = this->fsinv;
-      set = ( ival != 0 );
-      astWriteInt( channel, "FSInv", set, 0, ival,
-                   ival ? "Fwd selector used in inverse direction" :
-                          "Fwd selector used in forward direction" );
-   }
-
-
-/* Inverse selector Mapping */
-/* ------------------------ */
-   if( this->ismap ) {
-      astWriteObject( channel, "ISMap", 1, 1, this->ismap,
-                      "Inverse selector Mapping" );
-
-/* Forward selector Invert flag. */
-/* ----------------------------- */
-      ival = this->isinv;
-      set = ( ival != 0 );
-      astWriteInt( channel, "ISInv", set, 0, ival,
-                   ival ? "Inv selector used in inverse direction" :
-                          "Inv selector used in forward direction" );
-   }
-
-/* Loop to dump each route Mapping and its invert flag. */
-/* ---------------------------------------------------- */
-   for( i = 0; i < this->nroute; i++ ) {
-      sprintf( buf, "RMap%d", i + 1 );
-      astWriteObject( channel, buf, 1, 1, this->routemap[ i ],
-                      "Route Mapping" );
-
-      ival = this->routeinv[ i ];
-      set = ( ival != 0 );
-      sprintf( buf, "RInv%d", i + 1 );
-      astWriteInt( channel, buf, set, 0, ival,
-                   ival ? "Route Mapping used in inverse direction" :
-                          "Route Mapping used in forward direction" );
-   }
-
-}
-
-/* Standard class functions. */
-/* ========================= */
-/* Implement the astIsASwitchMap and astCheckSwitchMap functions using the
-   macros defined for this purpose in the "object.h" header file. */
-astMAKE_ISA(SwitchMap,Mapping)
-astMAKE_CHECK(SwitchMap)
-
-AstSwitchMap *astSwitchMap_( void *fsmap_void, void *ismap_void, int nroute,
-                             void **routemaps_void, const char *options, int *status, ...) {
-/*
-*+
-*  Name:
-*     astSwitchMap
-
-*  Purpose:
-*     Create a SwitchMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     AstSwitchMap *astSwitchMap( AstMapping *fsmap, AstMapping *ismap,
-*                                 int nroute, AstMapping **routemaps,
-*                                 const char *options, ... )
-
-*  Class Membership:
-*     SwitchMap constructor.
-
-*  Description:
-*     This function creates a new SwitchMap and optionally initialises its
-*     attributes.
-
-*  Parameters:
-*     fsmap
-*        Pointer to the forward selector Mapping
-*     ismap
-*        Pointer to the inverse selector Mapping
-*     nroute
-*        The number of route Mappings.
-*     routemaps
-*        An array of pointers to the route Mappings.
-*     options
-*        Pointer to a null terminated string containing an optional
-*        comma-separated list of attribute assignments to be used for
-*        initialising the new SwitchMap. 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 SwitchMap.
-
-*  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 SwitchMap constructor which is
-*     available via the protected interface to the SwitchMap class.  A
-*     public interface is provided by the astSwitchMapId_ 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 */
-   AstSwitchMap *new;            /* Pointer to new SwitchMap */
-   AstMapping *fsmap;            /* Pointer to fwd selector Mapping */
-   AstMapping *ismap;            /* Pointer to inv selector Mapping */
-   AstMapping **routemaps;       /* Array of route Mapping pointers */
-   int i;                        /* Route Mappings 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 route Mappings have been supplied. */
-   if( nroute <= 0 ) astError( AST__BDPAR, "astSwitchMap(SwitchMap): "
-                               "Bad number of route Mappings (%d) specified.", status,
-                               nroute );
-
-/* Otherwise create an array to hold the route Mapping pointers. */
-   routemaps = astMalloc( sizeof( AstMapping * )*nroute );
-
-/* Obtain and validate pointers to the Mapping structures provided. */
-   if( astOK ) {
-      fsmap = fsmap_void ? astCheckMapping( fsmap_void ) : NULL;
-      ismap = ismap_void ? astCheckMapping( ismap_void ) : NULL;
-      for( i = 0; i < nroute; i++ ) {
-         routemaps[ i ] = astCheckMapping( routemaps_void[ i ] );
-      }
-   }
-
-   if ( astOK ) {
-
-/* Initialise the SwitchMap, allocating memory and initialising the
-   virtual function table as well if necessary. */
-      new = astInitSwitchMap( NULL, sizeof( AstSwitchMap ), !class_init, &class_vtab,
-                              "SwitchMap", fsmap, ismap, nroute, routemaps );
-
-/* 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 SwitchMap'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 route Mapping pointers. */
-   routemaps = astFree( routemaps );
-
-/* Return a pointer to the new SwitchMap. */
-   return new;
-}
-
-AstSwitchMap *astSwitchMapId_( void *fsmap_void, void *ismap_void, int nroute,
-                               void **routemaps_void, const char *options, ... ) {
-/*
-*++
-*  Name:
-c     astSwitchMap
-f     AST_SWITCHMAP
-
-*  Purpose:
-*     Create a SwitchMap.
-
-*  Type:
-*     Public function.
-
-*  Synopsis:
-c     #include "switchmap.h"
-c     AstSwitchMap *astSwitchMap( AstMapping *fsmap, AstMapping *ismap,
-c                                 int nroute, AstMapping *routemaps[],
-c                                 const char *options, ... )
-f     RESULT = AST_SWITCHMAP( FSMAP, ISMAP, NROUTE, ROUTEMAPS, OPTIONS,
-f                             STATUS )
-
-*  Class Membership:
-*     SwitchMap constructor.
-
-*  Description:
-*     This function creates a new SwitchMap and optionally initialises
-*     its attributes.
-*
-*     A SwitchMap is a Mapping which represents a set of alternate
-*     Mappings, each of which is used to transform positions within a
-*     particular region of the input or output coordinate system of the
-*     SwitchMap.
-*
-*     A SwitchMap can encapsulate any number of Mappings, but they must
-*     all have the same number of inputs (Nin attribute value) and the
-*     same number of outputs (Nout attribute value). The SwitchMap itself
-*     inherits these same values for its Nin and Nout attributes. Each of
-*     these Mappings represents a "route" through the switch, and are
-*     referred to as "route" Mappings below. Each route Mapping transforms
-*     positions between the input and output coordinate space of the entire
-*     SwitchMap, but only one Mapping will be used to transform any given
-*     position. The selection of the appropriate route Mapping to use with
-*     any given input position is made by another Mapping, called the
-*     "selector" Mapping. Each SwitchMap encapsulates two selector
-*     Mappings in addition to its route Mappings; one for use with the
-*     SwitchMap's forward transformation (called the "forward selector
-*     Mapping"), and one for use with the SwitchMap's inverse transformation
-*     (called the "inverse selector Mapping"). The forward selector Mapping
-*     must have the same number of inputs as the route Mappings, but
-*     should have only one output. Likewise, the inverse selector Mapping
-*     must have the same number of outputs as the route Mappings, but
-*     should have only one input.
-*
-*     When the SwitchMap is used to transform a position in the forward
-*     direction (from input to output), each supplied input position is
-*     first transformed by the forward transformation of the forward selector
-*     Mapping. This produces a single output value for each input position
-*     referred to as the selector value. The nearest integer to the selector
-*     value is found, and is used to index the array of route Mappings (the
-*     first supplied route Mapping has index 1, the second route Mapping has
-*     index 2, etc). If the nearest integer to the selector value is less
-*     than 1 or greater than the number of route Mappings, then the SwitchMap
-*     output position is set to a value of AST__BAD on every axis. Otherwise,
-*     the forward transformation of the selected route Mapping is used to
-*     transform the supplied input position to produce the SwitchMap output
-*     position.
-*
-*     When the SwitchMap is used to transform a position in the inverse
-*     direction (from "output" to "input"), each supplied "output" position
-*     is first transformed by the inverse transformation of the inverse
-*     selector Mapping. This produces a selector value for each "output"
-*     position. Again, the nearest integer to the selector value is found,
-*     and is used to index the array of route Mappings. If this selector
-*     index value is within the bounds of the array of route Mappings, then
-*     the inverse transformation of the selected route Mapping is used to
-*     transform the supplied "output" position to produce the SwitchMap
-*     "input" position. If the selector index value is outside the bounds
-*     of the array of route Mappings, then the SwitchMap "input" position is
-*     set to a value of AST__BAD on every axis.
-*
-*     In practice, appropriate selector Mappings should be chosen to
-*     associate a different route Mapping with each region of coordinate
-*     space. Note that the SelectorMap class of Mapping is particularly
-*     appropriate for this purpose.
-*
-*     If a compound Mapping contains a SwitchMap in series with its own
-*     inverse, the combination of the two adjacent SwitchMaps will be
-*     replaced by a UnitMap when the compound Mapping is simplified using
-c     astSimplify.
-f     AST_SIMPLIFY.
-
-*  Parameters:
-c     fsmap
-f     FSMAP = INTEGER (Given)
-*        Pointer to the forward selector Mapping. This must have a
-*        defined forward transformation, but need not have a defined
-*        inverse transformation. It must have one output, and the number of
-*        inputs must match the number of inputs of each of the supplied
-*        route Mappings.
-c        NULL
-f        AST__NULL
-*        may be supplied, in which case the SwitchMap will have an undefined
-*        forward Mapping.
-c     ismap
-f     ISMAP = INTEGER (Given)
-*        Pointer to the inverse selector Mapping. This must have a
-*        defined inverse transformation, but need not have a defined
-*        forward transformation. It must have one input, and the number of
-*        outputs must match the number of outputs of each of the supplied
-*        route Mappings.
-c        NULL
-f        AST__NULL
-*        may be supplied, in which case the SwitchMap will have an undefined
-*        inverse Mapping.
-c     nroute
-f     NROUTE = INTEGER (Given)
-*        The number of supplied route Mappings.
-c     routemaps
-f     ROUTEMAPS( NROUTE ) = INTEGER (Given)
-*        An array of pointers to the route Mappings. All the supplied
-*        route Mappings must have common values for the Nin and Nout
-*        attributes, and these values define the number of inputs and
-*        outputs of the SwitchMap.
-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 SwitchMap. 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 SwitchMap. 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     astSwitchMap()
-f     AST_SWITCHMAP = INTEGER
-*        A pointer to the new SwitchMap.
-
-*  Notes:
-c     - Note that the component Mappings supplied are not copied by
-c     astSwitchMap (the new SwitchMap simply retains a reference to
-c     them). They may continue to be used for other purposes, but
-c     should not be deleted. If a SwitchMap containing a copy of its
-c     component Mappings is required, then a copy of the SwitchMap should
-c     be made using astCopy.
-f     - Note that the component Mappings supplied are not copied by
-f     AST_SWITCHMAP (the new SwitchMap simply retains a reference to
-f     them). They may continue to be used for other purposes, but
-f     should not be deleted. If a SwitchMap containing a copy of its
-f     component Mappings is required, then a copy of the SwitchMap should
-f     be made using AST_COPY.
-*     - 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 astSwitchMap constructor function. It returns an ID value
-*     (instead of a true C pointer) to external users, and must be
-*     provided because astSwitchMap_ 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 astSwitchMap_ 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 */
-   AstSwitchMap *new;            /* Pointer to new SwitchMap */
-   AstMapping *fsmap;            /* Pointer to fwd selector Mapping */
-   AstMapping *ismap;            /* Pointer to inv selector Mapping */
-   AstMapping **routemaps;       /* Array of route Mapping pointers */
-   int i;                        /* Route Mappings 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 route Mappings have been supplied. */
-   if( nroute <= 0 ) astError( AST__BDPAR, "astSwitchMap(SwitchMap): "
-                               " Bad number of route Mappings (%d) specified.", status,
-                               nroute );
-
-/* Otherwise create an array to hold the route Mapping pointers. */
-   routemaps = astMalloc( sizeof( AstMapping * )*nroute );
-
-/* Obtain and validate pointers to the Mapping structures provided. */
-   if( astOK ) {
-      fsmap = fsmap_void ? astCheckMapping( astMakePointer(fsmap_void) ) : NULL;
-      ismap = ismap_void ? astCheckMapping( astMakePointer(ismap_void) ) : NULL;
-      for( i = 0; i < nroute; i++ ) {
-         routemaps[ i ] = astVerifyMapping( astMakePointer(routemaps_void[ i ]) );
-      }
-   }
-
-   if ( astOK ) {
-
-/* Initialise the SwitchMap, allocating memory and initialising the
-   virtual function table as well if necessary. */
-      new = astInitSwitchMap( NULL, sizeof( AstSwitchMap ), !class_init, &class_vtab,
-                              "SwitchMap", fsmap, ismap, nroute, routemaps );
-
-/* 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 SwitchMap'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 route Mapping pointers. */
-   routemaps = astFree( routemaps );
-
-/* Return an ID value for the new SwitchMap. */
-   return astMakeId( new );
-}
-
-AstSwitchMap *astInitSwitchMap_( void *mem, size_t size, int init,
-                                 AstSwitchMapVtab *vtab, const char *name,
-                                 AstMapping *fsmap, AstMapping *ismap,
-                                 int nroute, AstMapping **routemaps, int *status ) {
-/*
-*+
-*  Name:
-*     astInitSwitchMap
-
-*  Purpose:
-*     Initialise a SwitchMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     AstSwitchMap *astInitSwitchMap( void *mem, size_t size, int init,
-*                                     AstSwitchMapVtab *vtab, const char *name,
-*                                     AstMapping *fsmap, AstMapping *ismap,
-*                                     int nroute, AstMapping **routemaps )
-
-*  Class Membership:
-*     SwitchMap initialiser.
-
-*  Description:
-*     This function is provided for use by class implementations to initialise
-*     a new SwitchMap object. It allocates memory (if necessary) to
-*     accommodate the SwitchMap plus any additional data associated with the
-*     derived class. It then initialises a SwitchMap 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 SwitchMap at the start of
-*     the memory passed via the "vtab" parameter.
-
-*  Parameters:
-*     mem
-*        A pointer to the memory in which the SwitchMap is to be initialised.
-*        This must be of sufficient size to accommodate the SwitchMap data
-*        (sizeof(SwitchMap)) 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 SwitchMap (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
-*        SwitchMap structure, so a valid value must be supplied even if not
-*        required for allocating memory.
-*     init
-*        A logical flag indicating if the SwitchMap'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 SwitchMap.
-*     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).
-*     fsmap
-*        Pointer to the forward selector Mapping.
-*     ismap
-*        Pointer to the inverse selector Mapping.
-*     nroute
-*        The number of route Mappings supplied.
-*     routemaps
-*        An array holdiong pointers to the route Mappings.
-
-*  Returned Value:
-*     A pointer to the new SwitchMap.
-
-*  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: */
-   AstSwitchMap *new;            /* Pointer to new SwitchMap */
-   int i;                        /* Loop count */
-   int nin;                      /* No. input coordinates for SwitchMap */
-   int nout;                     /* No. output coordinates for SwitchMap */
-
-/* Check the global status. */
-   if ( !astOK ) return NULL;
-
-/* If necessary, initialise the virtual function table. */
-   if ( init ) astInitSwitchMapVtab( vtab, name );
-
-/* Initialise. */
-   new = NULL;
-
-/* Check that all route Mappings have common values for Nin and Nout.*/
-   nin = astGetNin( routemaps[ 0 ] );
-   nout = astGetNout( routemaps[ 0 ] );
-   for( i = 1; i < nroute; i++ ) {
-      if( nin != astGetNin( routemaps[ i ] ) ){
-         if( astOK ) {
-            astError( AST__BADNI, "astInitSwitchMap(%s): Route Mapping "
-                      "number %d has %d input(s) but the first route "
-                      "Mapping has %d input(s).", status, name, i + 1,
-                      astGetNin( routemaps[ i ] ), nin );
-         }
-
-      } else if( nout != astGetNout( routemaps[ i ] ) ){
-         if( astOK ) {
-            astError( AST__BADNO, "astInitSwitchMap(%s): Route Mapping "
-                      "number %d has %d output(s) but the first route "
-                      "Mapping has %d output(s).", status, name, i + 1,
-                      astGetNin( routemaps[ i ] ), nin );
-         }
-      }
-   }
-
-/* If supplied, report an error if fsmap has no forward transformation,
-   or if it has an incorrect number of inputs or output. */
-   if( fsmap && astOK ) {
-      if( !astGetTranForward( fsmap ) ) {
-         astError( AST__INTRD, "astInitSwitchMap(%s): The forward selector Mapping "
-              "is not able to transform coordinates in the forward direction.", status,
-              name );
-
-      } else if( astGetNin( fsmap ) != nin ){
-         astError( AST__BADNI, "astInitSwitchMap(%s): The forward selector "
-                   "Mapping has %d input(s) but the SwitchMap has %d "
-                   "input(s).", status, name, astGetNin( fsmap ), nin );
-
-      } else if( astGetNout( fsmap ) != 1 ){
-         astError( AST__BADNO, "astInitSwitchMap(%s): The forward selector "
-                   "Mapping has %d outputs but should only have 1.", status, name,
-                   astGetNout( fsmap ) );
-      }
-   }
-
-/* If supplied, report an error if ismap has no inverse transformation,
-   or if it has an incorrect number of inputs or outputs. */
-   if( ismap && astOK ) {
-      if( !astGetTranInverse( ismap ) ) {
-         astError( AST__INTRD, "astInitSwitchMap(%s): The inverse selector Mapping "
-              "is not able to transform coordinates in the inverse direction.", status,
-              name );
-      } else if( nout != astGetNout( ismap ) ){
-         astError( AST__BADNO, "astInitSwitchMap(%s): The inverse selector "
-                   "Mapping has %d output(s) but the SwitchMap has %d "
-                   "output(s).", status, name, astGetNout( ismap ), nout );
-
-      } else if( astGetNin( ismap ) != 1 ){
-         astError( AST__BADNI, "astInitSwitchMap(%s): The inverse selector "
-                   "Mapping has %d inputs but should only have 1.", status, name,
-                   astGetNin( ismap ) );
-
-      }
-   }
-
-/* Report an error if neither ismap nor fsmap were supplied. */
-   if( !fsmap && !ismap && astOK ) {
-      astError( AST__INTRD, "astInitSwitchMap(%s): No selector Mappings "
-                "supplied.", status, name );
-   }
-
-/* Initialise a Mapping structure (the parent class) as the first component
-   within the SwitchMap 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 = (AstSwitchMap *) astInitMapping( mem, size, 0,
-                                             (AstMappingVtab *) vtab, name,
-                                             nin, nout,
-                                             ( fsmap != NULL ),
-                                             ( ismap != NULL ) );
-      if ( astOK ) {
-
-/* Initialise the SwitchMap data. */
-/* --------------------------- */
-/* Store pointers to the selector Mappings. */
-         new->fsmap = fsmap ? astClone( fsmap ) : NULL;
-         new->ismap = ismap ? astClone( ismap ) : NULL;
-
-/* Save the initial values of the inversion flags for these Mappings. */
-         new->fsinv = fsmap ? astGetInvert( fsmap ) : 0;
-         new->isinv = ismap ? astGetInvert( ismap ) : 0;
-
-/* Create arrays for the route Mappings. */
-         new->routemap = astMalloc( sizeof( AstMapping * )*nroute );
-         new->routeinv = astMalloc( sizeof( int )*nroute );
-
-/* Store pointers to the route Mappings and their invert flags. */
-         if( astOK ) {
-            new->nroute = nroute;
-            for( i = 0; i < nroute; i++ ) {
-               new->routemap[ i ] = astClone( routemaps[ i ] );
-               new->routeinv[ i ] = astGetInvert( routemaps[ i ] );
-            }
-         } else {
-            new->nroute = 0;
-         }
-
-/* 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;
-}
-
-AstSwitchMap *astLoadSwitchMap_( void *mem, size_t size,
-                                 AstSwitchMapVtab *vtab, const char *name,
-                                 AstChannel *channel, int *status ) {
-/*
-*+
-*  Name:
-*     astLoadSwitchMap
-
-*  Purpose:
-*     Load a SwitchMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "switchmap.h"
-*     AstSwitchMap *astLoadSwitchMap( void *mem, size_t size,
-*                                     AstSwitchMapVtab *vtab, const char *name,
-*                                     AstChannel *channel )
-
-*  Class Membership:
-*     SwitchMap loader.
-
-*  Description:
-*     This function is provided to load a new SwitchMap 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
-*     SwitchMap 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 SwitchMap at the start of the memory
-*     passed via the "vtab" parameter.
-
-
-*  Parameters:
-*     mem
-*        A pointer to the memory into which the SwitchMap is to be
-*        loaded.  This must be of sufficient size to accommodate the
-*        SwitchMap data (sizeof(SwitchMap)) 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 SwitchMap (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 SwitchMap 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(AstSwitchMap) is used instead.
-*     vtab
-*        Pointer to the start of the virtual function table to be
-*        associated with the new SwitchMap. If this is NULL, a pointer to
-*        the (static) virtual function table for the SwitchMap 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 "SwitchMap" is used instead.
-
-*  Returned Value:
-*     A pointer to the new SwitchMap.
-
-*  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 */
-   AstSwitchMap *new;
-   AstMapping *rmap;
-   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 SwitchMap. In this case the
-   SwitchMap belongs to this class, so supply appropriate values to be
-   passed to the parent class loader (and its parent, etc.). */
-   if ( !vtab ) {
-      size = sizeof( AstSwitchMap );
-      vtab = &class_vtab;
-      name = "SwitchMap";
-
-/* If required, initialise the virtual function table for this class. */
-      if ( !class_init ) {
-         astInitSwitchMapVtab( 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 SwitchMap. */
-   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, "SwitchMap" );
-
-/* 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. */
-
-/* Forward Selector Mapping and its Invert flag. */
-/* --------------------------------------------- */
-      new->fsmap = astReadObject( channel, "fsmap", NULL );
-      new->fsinv = astReadInt( channel, "fsinv", 0 );
-      new->fsinv = ( new->fsinv != 0 );
-
-/* Inverse Selector Mapping and its Invert flag. */
-/* --------------------------------------------- */
-      new->ismap = astReadObject( channel, "ismap", NULL );
-      new->isinv = astReadInt( channel, "isinv", new->fsinv );
-      new->isinv = ( new->isinv != 0 );
-
-/* Loop to load each route Mapping and its invert flag. */
-/* ---------------------------------------------------- */
-      new->routemap = NULL;
-      new->routeinv = NULL;
-      i = 0;
-      while( astOK ) {
-         sprintf( buf, "rmap%d", i + 1 );
-         rmap = astReadObject( channel, buf, NULL );
-         if( rmap ) {
-            new->routemap = astGrow( new->routemap, i + 1, sizeof( AstMapping *) );
-            new->routeinv = astGrow( new->routeinv, i + 1, sizeof( int ) );
-            if( astOK ) {
-               new->routemap[ i ] = rmap;
-               sprintf( buf, "rinv%d", i + 1 );
-               new->routeinv[ i ] = astReadInt( channel, buf, 0 );
-               new->routeinv[ i ] = ( new->routeinv[ i ] != 0 );
-               i++;
-            }
-         } else {
-            break;
-         }
-      }
-
-/* Number of route Mappings. */
-      new->nroute = i;
-
-/* If an error occurred, clean up by deleting the new SwitchMap. */
-      if ( !astOK ) new = astDelete( new );
-   }
-
-/* Return the new SwitchMap 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. */
-
-
-
-