update ast 8.6.2

1 files changed, 2189 insertions, 0 deletions

diff --git a/ast/specfluxframe.c b/ast/specfluxframe.c
new file mode 100644
index 0000000..ea00d49
--- /dev/null
+++ b/ast/specfluxframe.c
@@ -0,0 +1,2189 @@
+/*
+*class++
+*  Name:
+*     SpecFluxFrame
+
+*  Purpose:
+*     Compound spectrum/flux Frame.
+
+*  Constructor Function:
+c     astSpecFluxFrame
+f     AST_SPECFLUXFRAME
+
+*  Description:
+*     A SpecFluxFrame combines a SpecFrame and a FluxFrame into a single
+*     2-dimensional compound Frame. Such a Frame can for instance be used
+*     to describe a Plot of a spectrum in which the first axis represents
+*     spectral position and the second axis represents flux.
+
+*  Inheritance:
+*     The SpecFluxFrame class inherits from the CmpFrame class.
+
+*  Attributes:
+*     The SpecFluxFrame class does not define any new attributes beyond
+*     those which are applicable to all CmpFrames. However, the attributes
+*     of the component Frames can be accessed as if they were attributes
+*     of the SpecFluxFrame. For instance, the SpecFluxFrame will recognise
+*     the "StdOfRest" attribute and forward access requests to the component
+*     SpecFrame. An axis index can optionally be appended to the end of any
+*     attribute name, in which case the request to access the attribute will
+*     be forwarded to the primary Frame defining the specified axis.
+
+*  Functions:
+c     The SpecFluxFrame class does not define any new functions beyond those
+f     The SpecFluxFrame class does not define any new routines beyond those
+*     which are applicable to all CmpFrames.
+
+*  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:
+*     8-DEC-2004 (DSB):
+*        Original version.
+*     29-APR-2011 (DSB):
+*        Prevent astFindFrame from matching a subclass template against a
+*        superclass target.
+*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 SpecFluxFrame
+
+/* Define the first and last acceptable System values. */
+#define FIRST_SYSTEM AST__COMP
+#define LAST_SYSTEM AST__COMP
+
+/* 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 "globals.h"             /* Thread-safe global data access */
+#include "object.h"              /* Base Object class */
+#include "mapping.h"             /* Coordinate Mappings */
+#include "unitmap.h"             /* Unit Mappings */
+#include "permmap.h"             /* Coordinate permutation Mappings */
+#include "cmpmap.h"              /* Compound Mappings */
+#include "axis.h"                /* Coordinate axes */
+#include "cmpframe.h"            /* Parent CmpFrame class */
+#include "tranmap.h"             /* Separated transformation Mappings */
+#include "mathmap.h"             /* Algebraic Mappings */
+#include "ratemap.h"             /* Differential Mappings */
+#include "specframe.h"           /* SpecFrame class */
+#include "fluxframe.h"           /* FluxFrame class */
+#include "specfluxframe.h"       /* Interface definition for this class */
+
+/* Error code definitions. */
+/* ----------------------- */
+#include "ast_err.h"             /* AST error codes */
+
+/* C header files. */
+/* --------------- */
+#include <float.h>
+#include <math.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.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_match)( AstFrame *, AstFrame *, int, int **, int **, AstMapping **, AstFrame **, int * );
+static int (* parent_subframe)( AstFrame *, AstFrame *, int, const int *, const int *, AstMapping **, AstFrame **, int * );
+static const char *(* parent_gettitle)( AstFrame *, int * );
+
+/* Define macros for accessing each item of thread specific global data. */
+#ifdef THREAD_SAFE
+
+/* Define how to initialise thread-specific globals. */
+#define GLOBAL_inits \
+   globals->Class_Init = 0; \
+   globals->GetTitle_Buff[ 0 ] = 0;
+
+/* Create the function that initialises global data for this module. */
+astMAKE_INITGLOBALS(SpecFluxFrame)
+
+/* Define macros for accessing each item of thread specific global data. */
+#define class_init astGLOBAL(SpecFluxFrame,Class_Init)
+#define class_vtab astGLOBAL(SpecFluxFrame,Class_Vtab)
+#define gettitle_buff astGLOBAL(SpecFluxFrame,GetTitle_Buff)
+
+
+
+/* If thread safety is not needed, declare and initialise globals at static
+   variables. */
+#else
+
+static char gettitle_buff[ 101 ];
+
+
+/* Define the class virtual function table and its initialisation flag
+   as static variables. */
+static AstSpecFluxFrameVtab 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. */
+AstSpecFluxFrame *astSpecFluxFrameId_( void *, void *, const char *, ... );
+
+/* Prototypes for Private Member Functions. */
+/* ======================================== */
+static AstFluxFrame *GetFluxFrame( AstSpecFluxFrame *, int, int * );
+static AstMapping *MakeMap2( AstSpecFluxFrame *, int * );
+static AstMapping *MakeMap3( AstSpecFluxFrame *, AstSpecFluxFrame *, int * );
+static AstMapping *MakeMapF( AstFluxFrame *, AstSpecFrame *, AstFluxFrame *, AstSpecFrame *, int * );
+static AstMapping *MakeMapI( AstFluxFrame *, AstSpecFrame *, AstFluxFrame *, AstSpecFrame *, int * );
+static AstSpecFrame *GetSpecFrame( AstSpecFluxFrame *, int, int * );
+static const char *GetTitle( AstFrame *, int * );
+static int MakeSFMapping( AstSpecFluxFrame *, AstSpecFluxFrame *, AstMapping **, int * );
+static int Match( AstFrame *, AstFrame *, int, int **, int **, AstMapping **, AstFrame **, int * );
+static int SubFrame( AstFrame *, AstFrame *, int, const int *, const int *, AstMapping **, AstFrame **, int * );
+static void Dump( AstObject *, AstChannel *, int * );
+
+/* Member functions. */
+/* ================= */
+
+static AstFluxFrame *GetFluxFrame( AstSpecFluxFrame *this, int std, int *status ){
+/*
+*  Name:
+*     GetFluxFrame
+
+*  Purpose:
+*     Return a pointer to the FluxFrame in a FluxSpecFrame.
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstFluxFrame *GetFluxFrame( AstSpecFluxFrame *this, int std, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function.
+
+*  Description:
+*     Returns a pointer to the FluxFrame in a SpecFluxFrame.
+
+*  Parameters:
+*     this
+*        Pointer to the SpecFluxFrame.
+*     std
+*        If non zero, then the returned FluxFrame is a standardised copy of
+*        the FluxFrame in the supplied SpecFluxFrame, in which the System has
+*        been set explicitly (rather than potentially being defaulted), and
+*        the Units have been cleared to use default units appropriate to
+*        the flux System.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     A pointer to the FluxFrame. Should be freed using astAnnul when no
+*     longer needed.
+
+*  Notes:
+*     NULL is returned if this function is invoked with the global error
+*     status set or if it should fail for any reason.
+*/
+
+/* Local Variables; */
+   AstFluxFrame *ff;
+   AstFluxFrame *ret;
+
+/* Check the global error status. */
+   if ( !astOK ) return NULL;
+
+/* The FluxFrame is always the second Frame in the parent CmpFrame. */
+   ff = (AstFluxFrame *) ((AstCmpFrame *)this)->frame2;
+
+/* Produce a standardised copy of the FluxFrame if required, or clone the
+   above pointer otherwise. */
+   if( std ) {
+      ret = astCopy( ff );
+      astSetSystem( ret, astGetSystem( ff ) );
+      astClearUnit( ret, 0 );
+   } else {
+      ret = astClone( ff );
+   }
+
+/* Annul the returned pointer if anything went wrong. */
+   if( !astOK ) ret = astAnnul( ret );
+
+/* Return the result. */
+   return ret;
+}
+
+static AstSpecFrame *GetSpecFrame( AstSpecFluxFrame *this, int std, int *status ){
+/*
+*  Name:
+*     GetSpecFrame
+
+*  Purpose:
+*     Return a pointer to the SpecFrame in a FluxSpecFrame.
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstSpecFrame *GetSpecFrame( AstSpecFluxFrame *this, int std, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function.
+
+*  Description:
+*     Returns a pointer to the SpecFrame in a SpecFluxFrame.
+
+*  Parameters:
+*     this
+*        Pointer to the SpecFluxFrame.
+*     std
+*        If non zero, then the returned SpecFrame is a standardised copy of
+*        the SpecFrame in the supplied SpecFluxFrame, in which the System
+*        and Units have been set explicitly to the values appropriate to the
+*        flux system in use in the FluxFrame in the supplied SpecFluxFrame.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     A pointer to the FluxFrame. Should be freed using astAnnul when no
+*     longer needed.
+
+*  Notes:
+*     NULL is returned if this function is invoked with the global error
+*     status set or if it should fail for any reason.
+*/
+
+/* Local Variables; */
+   AstFluxFrame *ff;
+   AstSpecFrame *ret;
+   AstSpecFrame *sf;
+
+/* Check the global error status. */
+   if ( !astOK ) return NULL;
+
+/* Get a pointer to the SpecFrame (the first Frame in the parent CmpFrame). */
+   sf = (AstSpecFrame *) ((AstCmpFrame *)this)->frame1;
+
+/* If we want a standardised version of the SpecFrame... */
+   if( std ) {
+
+/* The FluxFrame is always the second Frame in the parent CmpFrame. */
+      ff = (AstFluxFrame *) ((AstCmpFrame *)this)->frame2;
+
+/* Produce a copy of the SpecFrame and set its System and Units
+   appropriate to the flux system (expressed in default units). */
+      ret = astCopy( sf );
+      astSetSystem( ret, astGetDensitySystem( ff ) );
+      astSetUnit( ret, 0, astGetDensityUnit( ff ) );
+
+/* If we are not standardising the SpecFrame, just return a clone of the
+   pointer in the parent CmpFrame. */
+   } else {
+      ret = astClone( sf );
+   }
+
+/* Annul the returned pointer if anything went wrong. */
+   if( !astOK ) ret = astAnnul( ret );
+
+/* Return the result. */
+   return ret;
+}
+
+static const char *GetTitle( AstFrame *this_frame, int *status ) {
+/*
+*  Name:
+*     GetTitle
+
+*  Purpose:
+*     Obtain a pointer to the Title string for a SpecFluxFrame.
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     const char *GetTitle( AstFrame *this_frame, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function (over-rides the astGetTitle method
+*     inherited from the CmpFrame class).
+
+*  Description:
+*     This function returns a pointer to the Title string for a SpecFluxFrame.
+*     A pointer to a suitable default string is returned if no Title value has
+*     previously been set.
+
+*  Parameters:
+*     this
+*        Pointer to the SpecFluxFrame.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     Pointer to a null-terminated character string containing the requested
+*     information.
+
+*  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
+   AstSpecFluxFrame *this;
+   AstSpecFrame *sf;
+   AstFluxFrame *ff;
+   const char *result;
+
+/* Check the global error status. */
+   if ( !astOK ) return NULL;
+
+/* Get a pointer to the thread specific global data structure. */
+   astGET_GLOBALS(this_frame);
+
+/* Initialise. */
+   result = NULL;
+
+/* Obtain a pointer to the SpecFluxFrame structure. */
+   this = (AstSpecFluxFrame *) this_frame;
+
+/* See if a Title string has been set. If so, use the parent astGetTitle
+   method to obtain a pointer to it. */
+   if ( astTestTitle( this ) ) {
+      result = (*parent_gettitle)( this_frame, status );
+
+/* Otherwise, we will generate a default Title string. Obtain the values of the
+   SpecFrame's attributes that determine what this string will be. */
+   } else {
+      ff = GetFluxFrame( this, 0, status );
+      sf = GetSpecFrame( this, 0, status );
+
+      if( astOK ) {
+         sprintf( gettitle_buff, "%s versus %s", astGetLabel( ff, 0 ),
+                  astGetLabel( sf, 0 ) );
+         gettitle_buff[ 0 ] = toupper( gettitle_buff[ 0 ] );
+         result = gettitle_buff;
+      }
+
+      ff = astAnnul( ff );
+      sf = astAnnul( sf );
+
+   }
+
+/* If an error occurred, clear the returned pointer value. */
+   if ( !astOK ) result = NULL;
+
+/* Return the result. */
+   return result;
+}
+
+void astInitSpecFluxFrameVtab_(  AstSpecFluxFrameVtab *vtab, const char *name, int *status ) {
+/*
+*+
+*  Name:
+*     astInitSpecFluxFrameVtab
+
+*  Purpose:
+*     Initialise a virtual function table for a SpecFluxFrame.
+
+*  Type:
+*     Protected function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     void astInitSpecFluxFrameVtab( AstSpecFluxFrameVtab *vtab, const char *name )
+
+*  Class Membership:
+*     SpecFluxFrame vtab initialiser.
+
+*  Description:
+*     This function initialises the component of a virtual function
+*     table which is used by the SpecFluxFrame 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 */
+   AstFrameVtab *frame;          /* Pointer to Frame 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. */
+   astInitCmpFrameVtab( (AstCmpFrameVtab *) vtab, name );
+
+/* Store a unique "magic" value in the virtual function table. This
+   will be used (by astIsASpecFluxFrame) 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 = &(((AstCmpFrameVtab *) vtab)->id);
+
+/* Initialise member function pointers. */
+/* ------------------------------------ */
+/* Store pointers to the member functions (implemented here) that
+   provide virtual methods for this class. */
+
+/* Save the inherited pointers to methods that will be extended, and
+   replace them with pointers to the new member functions. */
+   object = (AstObjectVtab *) vtab;
+   frame = (AstFrameVtab *) vtab;
+   mapping = (AstMappingVtab *) vtab;
+
+/* Store replacement pointers for methods which will be over-ridden by
+   new member functions implemented here. */
+
+   parent_match = frame->Match;
+   frame->Match = Match;
+
+   parent_subframe = frame->SubFrame;
+   frame->SubFrame = SubFrame;
+
+   parent_gettitle = frame->GetTitle;
+   frame->GetTitle = GetTitle;
+
+/* Declare the copy constructor, destructor and class dump
+   function. */
+   astSetDump( vtab, Dump, "SpecFluxFrame",
+               "Compound spectral/flux coordinate system description" );
+
+/* 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) );
+   }
+}
+
+static AstMapping *MakeMap2( AstSpecFluxFrame *this, int *status ){
+/*
+*  Name:
+*     MakeMap2
+
+*  Purpose:
+*     Generate the second Mapping required by MakeSFMapping
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstMapping *MakeMap2( AstSpecFluxFrame *this, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function.
+
+*  Description:
+*     The second Mapping used by MakeSFMapping contains three Mappings in
+*     parallel which converts v1 (flux value) and x1 (spectral position) into
+*     default units, and passes the third axis (a copy of flux value)
+*     unchanged.
+
+*  Parameters:
+*     this
+*        Pointer to the SpecFluxFrame to use.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     A pointer to the required Mapping, or NULL if the Mapping cannot be
+*     created. The Mapping will have 3 inputs and 3 outputs.
+
+*  Notes:
+*     NULL is returned if this function is invoked with the global error
+*     status set or if it should fail for any reason.
+*/
+
+/* Local Variables: */
+   AstFrame *f1;
+   AstFrame *f2;
+   AstFrameSet *fs;
+   AstMapping *ax1_map;
+   AstMapping *ax2_map;
+   AstMapping *ax3_map;
+   AstMapping *ret;
+   AstMapping *tmap;
+
+/* Initialise. */
+   ret = NULL;
+
+/* Check the global error status. */
+   if ( !astOK ) return ret;
+
+/* Input 0 is the supplied FluxFrame value and output 0 is the corresponding
+   value in the default units for the FluxFrame system. Take a copy of the
+   supplied FluxFrame, and fix its System value (which may be a default value
+   based on the Units string), and then clear the Units so that it represents
+   default units for the System. */
+   f1 = (AstFrame *) GetFluxFrame( this, 0, status );
+   f2 = (AstFrame *) GetFluxFrame( this, 1, status );
+
+/* Now, if conversion was possible, get the Mapping from the supplied
+   FluxFrame to the default units FluxFrame. */
+   fs = astConvert( f1, f2, "" );
+   f1 = astAnnul( f1 );
+   f2 = astAnnul( f2 );
+
+   if( fs ) {
+      ax1_map = astGetMapping( fs, AST__BASE, AST__CURRENT );
+      fs = astAnnul( fs );
+
+/* Input 1 is the supplied SpecFrame value and output 1 is the corresponding
+   value in the spectral system used by the flux system (wavelength or
+   frequency). Take a copy of the supplied SpecFrame, and fix its System
+   value to wavelength or frequency (depending on the System value of the
+   FluxFrame), and set up units of Hz or Angstrom (these are the spectral
+   position units used within the default flux units for a FluxFrame). */
+      f1 = (AstFrame *) GetSpecFrame( this, 0, status );
+      f2 = (AstFrame *) GetSpecFrame( this, 1, status );
+
+/* Now, if conversion was possible, get the Mapping from the supplied
+   SpecFrame to the required SpecFrame. */
+      fs = astConvert( f1, f2, "" );
+      f1 = astAnnul( f1 );
+      f2 = astAnnul( f2 );
+
+      if( fs ) {
+         ax2_map = astGetMapping( fs, AST__BASE, AST__CURRENT );
+         fs = astAnnul( fs );
+
+/* Create a UnitMap for the 3rd axis. */
+         ax3_map = (AstMapping *) astUnitMap( 1, "", status );
+
+/* Create a parallel CmpMap containing the three Mappings. */
+         tmap = (AstMapping *) astCmpMap( ax1_map, ax2_map, 0, "", status );
+         ret = (AstMapping *) astCmpMap( tmap, ax3_map, 0, "", status );
+
+/* Free remaining resources. */
+         tmap = astAnnul( tmap );
+         ax2_map = astAnnul( ax2_map );
+         ax3_map = astAnnul( ax3_map );
+
+      }
+      ax1_map = astAnnul( ax1_map );
+   }
+
+/* If an error has occurred, return NULL. */
+   if( !astOK ) ret = astAnnul( ret );
+
+/* Return the result */
+   return ret;
+}
+
+static AstMapping *MakeMap3( AstSpecFluxFrame *target, AstSpecFluxFrame *result, int *status ){
+/*
+*  Name:
+*     MakeMap3
+
+*  Purpose:
+*     Generate the third Mapping required by MakeSFMapping
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstMapping *MakeMap3( AstSpecFluxFrame *target, AstSpecFluxFrame *result, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function.
+
+*  Description:
+*     The third Mapping used by MakeSFMapping converts input (v1,x1) in
+*     default units to output (v2,x2) in default units. The third axis (x1)
+*     in original units is converted to x2 in original units.
+
+*  Parameters:
+*     target
+*        Pointer to the first SpecFluxFrame.
+*     result
+*        Pointer to the second SpecFluxFrame.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     A pointer to the required Mapping, or NULL if the Mapping cannot be
+*     created. The Mapping will have 3 inputs and 3 outputs.
+
+*  Notes:
+*     NULL is returned if this function is invoked with the global error
+*     status set or if it should fail for any reason.
+*/
+
+/* Local Variables: */
+   AstFluxFrame *ff2;
+   AstFluxFrame *ff1;
+   AstFrameSet *fs;
+   AstMapping *fmap;
+   AstMapping *imap;
+   AstMapping *mapa;
+   AstMapping *mapb;
+   AstMapping *ret;
+   AstSpecFrame *sf2;
+   AstSpecFrame *sf1;
+
+/* Initialise */
+   ret = NULL;
+
+/* Check the global error status. */
+   if ( !astOK ) return ret;
+
+/* The first two inputs and outputs are related by a TranMap which
+   converts between standardised (v1,x1) and standardised (v2,x2). Get
+   pointers to the standardised SpecFrames and FluxFrames in the two
+   supplied SpecFluxFrames. */
+   ff1 = GetFluxFrame( target, 1, status );
+   sf1 = GetSpecFrame( target, 1, status );
+   ff2 = GetFluxFrame( result, 1, status );
+   sf2 = GetSpecFrame( result, 1, status );
+
+/* Create the Mapping which defines the forward transformation of the
+   required TranMap. The forward transformation of this Mapping goes from
+   (v1,x1) to (v2,x2). */
+   fmap = MakeMapF( ff1, sf1, ff2, sf2, status );
+
+/* Create the Mapping which defines the inverse transformation of the
+   required TranMap. The inverse transformation of this Mapping goes from
+   (v2,x2) to (v1,x1). */
+   imap = MakeMapI( ff1, sf1, ff2, sf2, status );
+
+/* Combine these into a TranMap */
+   if( fmap && imap ) {
+      mapa = (AstMapping *) astTranMap( fmap, imap, "", status );
+   } else {
+      mapa = NULL;
+   }
+
+/* Free resources. */
+   ff1 = astAnnul( ff1 );
+   sf1 = astAnnul( sf1 );
+   ff2 = astAnnul( ff2 );
+   sf2 = astAnnul( sf2 );
+   if( fmap ) fmap = astAnnul( fmap );
+   if( imap ) imap = astAnnul( imap );
+
+/* The third input and output are related by a Mapping which converts
+   between supplied (x1) and supplied (x2). Get pointers to the original
+   unmodified SpecFrames in the two supplied SpecFluxFrames. */
+   sf1 = GetSpecFrame( target, 0, status );
+   sf2 = GetSpecFrame( result, 0, status );
+
+/* Find the Mapping from the first to the second. */
+   fs = astConvert( sf1, sf2, "" );
+   if( fs ) {
+      mapb = astGetMapping( fs, AST__BASE, AST__CURRENT );
+      fs = astAnnul( fs );
+   } else {
+      mapb = NULL;
+   }
+
+/* Free resources. */
+   sf1 = astAnnul( sf1 );
+   sf2 = astAnnul( sf2 );
+
+/* Combine the two Mappings in parallel. */
+   if( mapa && mapb ) ret = (AstMapping *) astCmpMap( mapa, mapb, 0, "", status );
+   if( mapa ) mapa = astAnnul( mapa );
+   if( mapb ) mapb = astAnnul( mapb );
+
+/* If an error has occurred, return NULL. */
+   if( !astOK ) ret = astAnnul( ret );
+
+/* Return the result */
+   return ret;
+}
+
+static AstMapping *MakeMapF( AstFluxFrame *v1, AstSpecFrame *x1,
+                             AstFluxFrame *v2, AstSpecFrame *x2, int *status ){
+/*
+*  Name:
+*     MakeMapF
+
+*  Purpose:
+*     Generate the forward part of the third Mapping required by MakeSFMapping
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstMapping *MakeMapF( AstFluxFrame *v1, AstSpecFrame *x1,
+*                           AstFluxFrame *v2, AstSpecFrame *x2, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function.
+
+*  Description:
+*     Theis creates a 2-input 2-output Mapping which transforms
+*     input (v1,x1) in default units to output (v2,x2) in default units.
+
+*  Parameters:
+*     v1
+*        Pointer to the standardised input FluxFrame.
+*     x1
+*        Pointer to the standardised input SpecFrame.
+*     v2
+*        Pointer to the standardised output FluxFrame.
+*     x2
+*        Pointer to the standardised output SpecFrame.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     A pointer to the required Mapping, or NULL if the Mapping cannot be
+*     created.
+
+*  Notes:
+*     NULL is returned if this function is invoked with the global error
+*     status set or if it should fail for any reason.
+*/
+
+/* Local Variables: */
+   AstCmpMap *cmap1;
+   AstCmpMap *cmap2;
+   AstCmpMap *cmap3;
+   AstFrameSet *fs;
+   AstMapping *m;
+   AstMapping *ret;
+   AstMathMap *div;
+   AstPermMap *perm;
+   AstRateMap *rate;
+   AstUnitMap *unit;
+   const char *fwd[1];
+   const char *inv[2];
+   int inperm[ 2 ];
+   int outperm[ 3 ];
+
+/* Initialise */
+   ret = NULL;
+
+/* Check the global error status. */
+   if ( !astOK ) return ret;
+
+/* First create the required component Mappings.
+   --------------------------------------------- */
+
+/* A Mapping which maps input spectral position (x1) into output spectral
+   position (x2). */
+   fs = astConvert( x1, x2, "" );
+   if( fs ) {
+      m = astGetMapping( fs, AST__BASE, AST__CURRENT );
+
+/* A 1-input 1-output Mapping in which the input is spectral position (x1)
+   and the output is the rate of change of output spectral position (x2)
+   with respect to input spectral position (x1). */
+      rate = astRateMap( m, 0, 0, "", status );
+
+/* A MathMap which is used to divide the flux value (v1) by the absolute rate
+   of change of x2 wrt x1 */
+      fwd[ 0 ] = "out=in0/abs(in1)";
+      inv[ 0 ] = "in0";
+      inv[ 1 ] = "in1";
+      div = astMathMap( 2, 1, 1, fwd, 2, inv, "", status );
+
+/* A 1D UnitMap used to copy v1. */
+      unit = astUnitMap( 1, "", status );
+
+/* A PermMap which is used to produce an extra output copy of x1. */
+      inperm[ 0 ] = 0;
+      inperm[ 1 ] = 2;
+      outperm[ 0 ] = 0;
+      outperm[ 1 ] = 1;
+      outperm[ 2 ] = 1;
+      perm = astPermMap( 2, inperm, 3, outperm, NULL, "", status );
+
+/* Now combine these component Mappings together.
+   --------------------------------------------- */
+
+/* First put the UnitMap and the RateMap in parallel. This produces a 2-in
+   2-out Mapping in which the inputs are (v1,x1) and the outputs are
+   (v1,dx2/dx1). */
+      cmap1 = astCmpMap( unit, rate, 0, "", status );
+
+/* Now put this in series with the dividing MathMap. This results in a
+   2-in, 1-out Mapping in which the inputs are v1 and x1 and the single
+   output is v2. */
+      cmap2 = astCmpMap( cmap1, div, 1, "", status );
+
+/* Now put this in parallel with the x1->x2 Mapping. This results in a
+   3-in, 2-out Mapping in which the inputs are (v1,x1,x1) and the outputs
+   are (v2,x2). */
+      cmap3 = astCmpMap( cmap2, m, 0, "", status );
+
+/* Finally put this in series with the PermMap. This results in a 2-in,
+   2-out Mapping in which the inputs are (v1,x1) and the outputs are
+   (v2,x2). */
+      ret = (AstMapping *) astCmpMap( perm, cmap3, 1, "", status );
+
+/* Free resources. */
+      fs = astAnnul( fs );
+      m = astAnnul( m );
+      rate = astAnnul( rate );
+      div= astAnnul( div );
+      unit = astAnnul( unit );
+      perm = astAnnul( perm );
+      cmap1 = astAnnul( cmap1 );
+      cmap2 = astAnnul( cmap2 );
+      cmap3 = astAnnul( cmap3 );
+   }
+
+/* If an error has occurred, return NULL. */
+   if( !astOK ) ret = astAnnul( ret );
+
+/* Return the result */
+   return ret;
+}
+
+static AstMapping *MakeMapI( AstFluxFrame *v1, AstSpecFrame *x1,
+                             AstFluxFrame *v2, AstSpecFrame *x2, int *status ){
+/*
+*  Name:
+*     MakeMapI
+
+*  Purpose:
+*     Generate the inverse part of the third Mapping required by MakeSFMapping
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstMapping *MakeMapI( AstFluxFrame *v1, AstSpecFrame *x1,
+*                           AstFluxFrame *v2, AstSpecFrame *x2 )
+
+*  Class Membership:
+*     SpecFluxFrame member function.
+
+*  Description:
+*     This creates a 2-input 2-output Mapping in which the inverse
+*     transformation transforms "outputs" representing (v2,x2) into
+*     "inputs" representing (v1,x1).
+
+*  Parameters:
+*     v1
+*        Pointer to the standardised input FluxFrame.
+*     x1
+*        Pointer to the standardised input SpecFrame.
+*     v2
+*        Pointer to the standardised output FluxFrame.
+*     x2
+*        Pointer to the standardised output SpecFrame.
+
+*  Returned Value:
+*     A pointer to the required Mapping, or NULL if the Mapping cannot be
+*     created.
+
+*  Notes:
+*     NULL is returned if this function is invoked with the global error
+*     status set or if it should fail for any reason.
+*/
+
+/* Local Variables: */
+   AstCmpMap *cmap1;
+   AstCmpMap *cmap2;
+   AstCmpMap *cmap3;
+   AstCmpMap *cmap4;
+   AstCmpMap *cmap5;
+   AstFrameSet *fs;
+   AstMapping *m;
+   AstMapping *ret;
+   AstMathMap *mult;
+   AstPermMap *perm;
+   AstRateMap *rate;
+   AstUnitMap *unit;
+   const char *fwd[1];
+   const char *inv[2];
+   int inperm[ 2 ];
+   int outperm[ 3 ];
+
+/* Initialise */
+   ret = NULL;
+
+/* Check the global error status. */
+   if ( !astOK ) return ret;
+
+/* We create a CmpMap in which the forward transformation foes from
+   (v2,x2) to (v1,x1) and we finally invert this Mapping to get the
+   required Mapping in which the *inverse* transformation goes from
+   (v2,x2) to (v1,x1).
+
+   First create the required component Mappings.
+   --------------------------------------------- */
+
+/* A Mapping which maps spectral position x1 into spectral position x2. */
+   fs = astConvert( x1, x2, "" );
+   if( fs ) {
+      m = astGetMapping( fs, AST__BASE, AST__CURRENT );
+
+/* A 1-input 1-output Mapping in which the input is spectral position x1
+   and the output is the rate of change of spectral position x2 with
+   respect to spectral position x1. */
+      rate = astRateMap( m, 0, 0, "", status );
+
+/* Now invert "m" so that its forward transformation goes from x2 to x1.
+   The RateMap created above retains a copy of the original Invert flag
+   for "m" and uses it in preference to the current value when transforming
+   points. */
+      astInvert( m );
+
+/* A MathMap which is used to multiple the flux value v2 by the
+   absolute rate of change of x2 wrt x1 */
+      fwd[ 0 ] = "out=in0*abs(in1)";
+      inv[ 0 ] = "in0";
+      inv[ 1 ] = "in1";
+      mult = astMathMap( 2, 1, 1, fwd, 2, inv, "", status );
+
+/* A 1D UnitMap used to copy various values. */
+      unit = astUnitMap( 1, "", status );
+
+/* A PermMap which is used to produce an extra copy of x1. */
+      inperm[ 0 ] = 0;
+      inperm[ 1 ] = 2;
+      outperm[ 0 ] = 0;
+      outperm[ 1 ] = 1;
+      outperm[ 2 ] = 1;
+      perm = astPermMap( 2, inperm, 3, outperm, NULL, "", status );
+
+/* Now combine these component Mappings together.
+   --------------------------------------------- */
+
+/* First put the UnitMap and the RateMap in parallel. This produces a 2-in
+   2-out Mapping in which the inputs are (v2,x1) and the outputs are
+   (v2,dx2/dx1). */
+      cmap1 = astCmpMap( unit, rate, 0, "", status );
+
+/* Now put this in series with the multiplying MathMap. This results in a
+   2-in, 1-out Mapping in which the inputs are (v2,x1) and the single
+   output is v1. */
+      cmap2 = astCmpMap( cmap1, mult, 1, "", status );
+
+/* Now put this in parallel with the UnitMap to get a 3-in, 2-out Mapping
+   in which the inputs are (v2,x1,x1) and the outputs are (v1,x1). */
+      cmap3 = astCmpMap( cmap2, unit, 0, "", status );
+
+/* Now put this in series with the PermMap to get a 2-in, 2-out Mapping
+   in which the inputs are (v2,x1) and the outputs are (v1,x1). */
+      cmap4 = astCmpMap( perm, cmap3, 1, "", status );
+
+/* Now put the UnitMap in parallel with the (x2->x1 Mapping to get a
+   2-in, 2-out Mapping in which the inputs are (v2,x2) and the outputs are
+   (v2,x1). */
+      cmap5 = astCmpMap( unit, m, 0, "", status );
+
+/* Finally put this in series with "cmap4" to get a 2-in 2-out Mapping
+   from (v2,x2) to (v1,x1). */
+      ret = (AstMapping *) astCmpMap( cmap5, cmap4, 1, "", status );
+
+/* Invert this so that the inverse transformation goes from (v2,x2) to
+   (v1,x1). */
+      astInvert( ret );
+
+/* Free resources. */
+      fs = astAnnul( fs );
+      m = astAnnul( m );
+      rate = astAnnul( rate );
+      mult = astAnnul( mult );
+      unit = astAnnul( unit );
+      perm = astAnnul( perm );
+      cmap1 = astAnnul( cmap1 );
+      cmap2 = astAnnul( cmap2 );
+      cmap3 = astAnnul( cmap3 );
+      cmap4 = astAnnul( cmap4 );
+      cmap5 = astAnnul( cmap5 );
+   }
+
+/* If an error has occurred, return NULL. */
+   if( !astOK ) ret = astAnnul( ret );
+
+/* Return the result */
+   return ret;
+}
+
+static int MakeSFMapping( AstSpecFluxFrame *target, AstSpecFluxFrame *result,
+                          AstMapping **map, int *status ){
+/*
+*  Name:
+*     MakeSFMapping
+
+*  Purpose:
+*     Generate a Mapping between two SpecFluxFrames.
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     int MakeSFMapping( AstSpecFluxFrame *target, AstSpecFluxFrame *result,
+*                        AstMapping **map, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function.
+
+*  Description:
+*     This function takes two SpecFluxFrames and generates a Mapping that
+*     converts between them, taking account of differences in their
+*     coordinate systems, systems, units, etc. (but not allowing for any
+*     axis permutations).
+
+*  Parameters:
+*     target
+*        Pointer to the first SpecFluxFrame.
+*     result
+*        Pointer to the second SpecFluxFrame.
+*     map
+*        Pointer to a location which is to receive a pointer to the
+*        returned Mapping. The forward transformation of this Mapping
+*        will convert from "target" coordinates to "result"
+*        coordinates, and the inverse transformation will convert in
+*        the opposite direction (all coordinate values in radians).
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     Non-zero if the Mapping could be generated, or zero if the two
+*     SpecFluxFrames are sufficiently un-related that no meaningful Mapping
+*     can be produced.
+
+*  Notes:
+*     A value of zero is returned if this function is invoked with the
+*     global error status set or if it should fail for any reason.
+*/
+
+/* Local Variables: */
+   AstMapping *map1;
+   AstMapping *map2;
+   AstMapping *map3;
+   AstMapping *map4;
+   AstMapping *map5;
+   AstMapping *tmap1;
+   AstMapping *tmap2;
+   AstMapping *tmap3;
+   AstMapping *tmap4;
+   int inperm[2];
+   int match;
+   int outperm[3];
+
+/* Check the global error status. */
+   if ( !astOK ) return 0;
+
+/* Initialise the returned values. */
+   match = 0;
+   *map = NULL;
+
+/* Initialise other things. */
+   map1 = NULL;
+   map2 = NULL;
+   map3 = NULL;
+   map4 = NULL;
+   map5 = NULL;
+   tmap1 = NULL;
+   tmap2 = NULL;
+   tmap3 = NULL;
+   tmap4 = NULL;
+
+/* At the top level, the required Mapping consists of five Mappings in
+   series. Inputs 0 and 1 of the total Mapping correspond to the SpecFrame
+   and FluxFrame in the target SpecFluxFrame. These are referred to as X1
+   and V1. Outputs 0 and 1 of the total Mapping correspond to the SpecFrame
+   and FluxFrame in the result SpecFluxFrame. These are referred to as X2
+   and V2. */
+
+/* Map1 is a PermMap which copies v1 to its first output and x1 to its
+   second and third outputs. The inverse transformation copies v1 from
+   its first output and x1 from its third output. */
+   inperm[ 0 ] = 2;
+   inperm[ 1 ] = 0;
+   outperm[ 0 ] = 1;
+   outperm[ 1 ] = 0;
+   outperm[ 2 ] = 0;
+   map1 = (AstMapping *) astPermMap( 2, inperm, 3, outperm, NULL, "", status );
+
+/* Map2 contains three Mappings in parallel which converts v1 and x1 into
+   default units, and passes the third axis unchanged. */
+   map2 = MakeMap2( target, status );
+
+/* Map3 converts ( v1,x1) in default units to (v2,x2) in default units.
+   The third axis (x1) in original units is convert to x2 in original
+   units. */
+   map3 = map2 ? MakeMap3( target, result, status ) : NULL;
+
+/* Map4 converts (v2,x2) in default units to (v2,x2) in original units
+   and passes the third axis unchanged. This is similar to Map2 but based
+   on the result ratherthan the target, and in the opposite direction. */
+   if( map3 ) {
+      map4 = MakeMap2( result, status );
+      if( map4 ) astInvert( map4 );
+   } else {
+      map4 = NULL;
+   }
+
+/* Map5 is a PermMap which is the inverse of Map1. */
+   map5 = map4 ? astCopy( map1 ) : NULL;
+   if( map5 ) astInvert( map5 );
+
+/* Combine all 6 Mappings in series. */
+   if( map5 ) {
+      tmap1 = (AstMapping *) astCmpMap( map1, map2, 1, "", status );
+      tmap2 = (AstMapping *) astCmpMap( tmap1, map3, 1, "", status );
+      tmap3 = (AstMapping *) astCmpMap( tmap2, map4, 1, "", status );
+      tmap4 = (AstMapping *) astCmpMap( tmap3, map5, 1, "", status );
+
+/* Return the simplified total Mapping. */
+      *map = astSimplify( tmap4 );
+      match = 1;
+   }
+
+/* Free resources. */
+   if( map1 ) map1 = astAnnul( map1 );
+   if( map2 ) map2 = astAnnul( map2 );
+   if( map3 ) map3 = astAnnul( map3 );
+   if( map4 ) map4 = astAnnul( map4 );
+   if( map5 ) map5 = astAnnul( map5 );
+   if( tmap1 ) tmap1 = astAnnul( tmap1 );
+   if( tmap2 ) tmap2 = astAnnul( tmap2 );
+   if( tmap3 ) tmap3 = astAnnul( tmap3 );
+   if( tmap4 ) tmap4 = astAnnul( tmap4 );
+
+/* If an error occurred, annul the returned Mapping and clear the
+   returned values. */
+   if ( !astOK ) {
+      *map = astAnnul( *map );
+      match = 0;
+   }
+
+/* Return the result. */
+   return match;
+}
+
+static int Match( AstFrame *template_frame, AstFrame *target, int matchsub,
+                  int **template_axes, int **target_axes,
+                  AstMapping **map, AstFrame **result, int *status ) {
+/*
+*  Name:
+*     Match
+
+*  Purpose:
+*     Determine if conversion is possible between two coordinate systems.
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     int Match( AstFrame *template, AstFrame *target, int matchsub,
+*                int **template_axes, int **target_axes,
+*                AstMapping **map, AstFrame **result, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function (over-rides the protected astMatch
+*     method inherited from the Frame class).
+
+*  Description:
+*     This function matches a "template" SpecFluxFrame to a "target" Frame
+*     and determines whether it is possible to convert coordinates
+*     between them.  If it is, a Mapping that performs the
+*     transformation is returned along with a new Frame that describes
+*     the coordinate system that results when this Mapping is applied
+*     to the "target" coordinate system. In addition, information is
+*     returned to allow the axes in this "result" Frame to be
+*     associated with the corresponding axes in the "target" Frame and
+*     "template" SpecFluxFrame from which they are derived.
+
+*  Parameters:
+*     template
+*        Pointer to the template SpecFluxFrame. This describes the
+*        coordinate system (or set of possible coordinate systems)
+*        into which we wish to convert our coordinates.
+*     target
+*        Pointer to the target Frame. This describes the coordinate
+*        system in which we already have coordinates.
+*     matchsub
+*        If zero then a match only occurs if the template is of the same
+*        class as the target, or of a more specialised class. If non-zero
+*        then a match can occur even if this is not the case.
+*     template_axes
+*        Address of a location where a pointer to int will be returned
+*        if the requested coordinate conversion is possible. This
+*        pointer will point at a dynamically allocated array of
+*        integers with one element for each axis of the "result" Frame
+*        (see below). It must be freed by the caller (using astFree)
+*        when no longer required.
+*
+*        For each axis in the result Frame, the corresponding element
+*        of this array will return the (zero-based) index of the
+*        template SpecFluxFrame axis from which it is derived. If it is not
+*        derived from any template axis, a value of -1 will be
+*        returned instead.
+*     target_axes
+*        Address of a location where a pointer to int will be returned
+*        if the requested coordinate conversion is possible. This
+*        pointer will point at a dynamically allocated array of
+*        integers with one element for each axis of the "result" Frame
+*        (see below). It must be freed by the caller (using astFree)
+*        when no longer required.
+*
+*        For each axis in the result Frame, the corresponding element
+*        of this array will return the (zero-based) index of the
+*        target Frame axis from which it is derived. If it is not
+*        derived from any target axis, a value of -1 will be returned
+*        instead.
+*     map
+*        Address of a location where a pointer to a new Mapping will
+*        be returned if the requested coordinate conversion is
+*        possible. If returned, the forward transformation of this
+*        Mapping may be used to convert coordinates between the
+*        "target" Frame and the "result" Frame (see below) and the
+*        inverse transformation will convert in the opposite
+*        direction.
+*     result
+*        Address of a location where a pointer to a new Frame will be
+*        returned if the requested coordinate conversion is
+*        possible. If returned, this Frame describes the coordinate
+*        system that results from applying the returned Mapping
+*        (above) to the "target" coordinate system. In general, this
+*        Frame will combine attributes from (and will therefore be
+*        more specific than) both the target Frame and the template
+*        SpecFluxFrame. In particular, when the template allows the
+*        possibility of transformaing to any one of a set of
+*        alternative coordinate systems, the "result" Frame will
+*        indicate which of the alternatives was used.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     A non-zero value is returned if the requested coordinate
+*     conversion is possible. Otherwise zero is returned (this will
+*     not in itself result in an error condition).
+
+*  Notes:
+*     - By default, the "result" Frame will have its number of axes
+*     and axis order determined by the "template" SpecFluxFrame. However,
+*     if the PreserveAxes attribute of the template SpecFluxFrame is
+*     non-zero, then the axis count and axis order of the "target"
+*     Frame will be used instead.
+*     - A value of zero will be returned if this function is invoked
+*     with the global error status set, or if it should fail for any
+*     reason.
+*/
+
+/* Local Variables: */
+   AstSpecFluxFrame *template;   /* Pointer to template SpecFluxFrame structure */
+   int match;                    /* Coordinate conversion possible? */
+   int swap1;                    /* Template axes swapped? */
+   int swap2;                    /* Target axes swapped? */
+   int swap;                     /* Additional axis swap needed? */
+
+/* Initialise the returned values. */
+   *template_axes = NULL;
+   *target_axes = NULL;
+   *map = NULL;
+   *result = NULL;
+   match = 0;
+
+/* Check the global error status. */
+   if ( !astOK ) return match;
+
+/* Obtain a pointer to the template SpecFluxFrame structure. */
+   template = (AstSpecFluxFrame *) template_frame;
+
+/* If the target is not a SpecFluxFrame, use the results returned by the
+   parent Match method inherited from the CmpFrame class. */
+   if( !astIsASpecFluxFrame( target ) ) {
+      match = (*parent_match)( template_frame, target, matchsub, template_axes,
+                               target_axes, map, result, status );
+
+
+/* If the target is a SpecFluxFrame, see if we can convert between target
+   and template */
+   } else {
+
+/* We must now decide how the order of the axes in the result Frame relates to
+   the order of axes in the target Frame. There are two factors involved. The
+   first depends on whether the axis permutation array for the template
+   SpecFluxFrame (whose method we are executing) causes an axis
+   reversal. Determine this by permuting axis index zero. */
+      swap1 = ( astValidateAxis( template, 0, 1, "astMatch" ) != 0 );
+
+/* The second factor depends on whether the axes of the target SpecFluxFrame
+   causes an axis reversal. Determine this by permuting axis index zero. */
+      swap2 = ( astValidateAxis( target, 0, 1, "astMatch" ) != 0 );
+
+/* Combine these to determine if an additional axis swap will be
+   needed. */
+      swap = ( swap1 != swap2 );
+
+/* Now check to see if this additional swap is permitted by the template's
+   Permute attribute. */
+      match = ( !swap || astGetPermute( template ) );
+
+/* Allocate the target and template axes arrays. */
+      *template_axes = astMalloc( sizeof(int)*2 );
+      *target_axes = astMalloc( sizeof(int)*2 );
+
+/* If the Frames still match, we next set up the axis association
+   arrays. */
+      if ( astOK && match ) {
+
+/* If the target axis order is to be preserved, then the target axis
+   association involves no permutation but the template axis
+   association may involve an axis swap. */
+         if ( astGetPreserveAxes( template ) ) {
+            (*template_axes)[ 0 ] = swap;
+            (*template_axes)[ 1 ] = !swap;
+            (*target_axes)[ 0 ] = 0;
+            (*target_axes)[ 1 ] = 1;
+
+/* Otherwise, any swap applies to the target axis association
+   instead. */
+         } else {
+            (*template_axes)[ 0 ] = 0;
+            (*template_axes)[ 1 ] = 1;
+            (*target_axes)[ 0 ] = swap;
+            (*target_axes)[ 1 ] = !swap;
+         }
+
+/* Use the target's "astSubFrame" method to create a new Frame (the
+   result Frame) with copies of the target axes in the required
+   order. This process also overlays the template attributes on to the
+   target Frame and returns a Mapping between the target and result
+   Frames which effects the required coordinate conversion. */
+         match = astSubFrame( target, template, 2, *target_axes, *template_axes,
+                              map, result );
+
+/* If an error occurred, or conversion to the result Frame's
+   coordinate system was not possible, then free all memory, annul the
+   returned objects, and reset the returned value. */
+         if ( !astOK || !match ) {
+            *template_axes = astFree( *template_axes );
+            *target_axes = astFree( *target_axes );
+            if( *map ) *map = astAnnul( *map );
+            if( *result ) *result = astAnnul( *result );
+            match = 0;
+         }
+      }
+   }
+
+/* Return the result. */
+   return match;
+}
+
+static int SubFrame( AstFrame *target_frame, AstFrame *template,
+                     int result_naxes, const int *target_axes,
+                     const int *template_axes, AstMapping **map,
+                     AstFrame **result, int *status ) {
+/*
+*  Name:
+*     SubFrame
+
+*  Purpose:
+*     Select axes from a SpecFluxFrame and convert to the new coordinate system.
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     int SubFrame( AstFrame *target, AstFrame *template,
+*                   int result_naxes, const int *target_axes,
+*                   const int *template_axes, AstMapping **map,
+*                   AstFrame **result, int *status )
+
+*  Class Membership:
+*     SpecFluxFrame member function (over-rides the protected astSubFrame
+*     method inherited from the Frame class).
+
+*  Description:
+*     This function selects a requested sub-set (or super-set) of the
+*     axes from a "target" SpecFluxFrame and creates a new Frame with
+*     copies of the selected axes assembled in the requested order. It
+*     then optionally overlays the attributes of a "template" Frame on
+*     to the result. It returns both the resulting Frame and a Mapping
+*     that describes how to convert between the coordinate systems
+*     described by the target and result Frames. If necessary, this
+*     Mapping takes account of any differences in the Frames'
+*     attributes due to the influence of the template.
+
+*  Parameters:
+*     target
+*        Pointer to the target SpecFluxFrame, from which axes are to be selected.
+*     template
+*        Pointer to the template Frame, from which new attributes for
+*        the result Frame are to be obtained. Optionally, this may be
+*        NULL, in which case no overlaying of template attributes will
+*        be performed.
+*     result_naxes
+*        Number of axes to be selected from the target Frame. This
+*        number may be greater than or less than the number of axes in
+*        this Frame (or equal).
+*     target_axes
+*        Pointer to an array of int with result_naxes elements, giving
+*        a list of the (zero-based) axis indices of the axes to be
+*        selected from the target SpecFluxFrame. The order in which these
+*        are given determines the order in which the axes appear in
+*        the result Frame. If any of the values in this array is set
+*        to -1, the corresponding result axis will not be derived from
+*        the target Frame, but will be assigned default attributes
+*        instead.
+*     template_axes
+*        Pointer to an array of int with result_naxes elements. This
+*        should contain a list of the template axes (given as
+*        zero-based axis indices) with which the axes of the result
+*        Frame are to be associated. This array determines which axes
+*        are used when overlaying axis-dependent attributes of the
+*        template on to the result. If any element of this array is
+*        set to -1, the corresponding result axis will not receive any
+*        template attributes.
+*
+*        If the template argument is given as NULL, this array is not
+*        used and a NULL pointer may also be supplied here.
+*     map
+*        Address of a location to receive a pointer to the returned
+*        Mapping.  The forward transformation of this Mapping will
+*        describe how to convert coordinates from the coordinate
+*        system described by the target SpecFluxFrame to that described by
+*        the result Frame. The inverse transformation will convert in
+*        the opposite direction.
+*     result
+*        Address of a location to receive a pointer to the result Frame.
+*     status
+*        Pointer to the inherited status variable.
+
+*  Returned Value:
+*     A non-zero value is returned if coordinate conversion is
+*     possible between the target and the result Frame. Otherwise zero
+*     is returned and *map and *result are returned as NULL (but this
+*     will not in itself result in an error condition). In general,
+*     coordinate conversion should always be possible if no template
+*     Frame is supplied but may not always be possible otherwise.
+
+*  Notes:
+*     - A value of zero will be returned if this function is invoked
+*     with the global error status set, or if it should fail for any
+*     reason.
+
+*  Implementation Deficiencies:
+*     - It is not clear that the method of handling "extra" axes is
+*     the best one, nor is the method of setting the "following" flag
+*     necessarily correct.  However, it is also not obvious that this
+*     feature will ever be needed, so improvements have been left
+*     until the requirement is clearer.
+*/
+
+/* Local Variables: */
+   AstMapping *tmpmap;           /* Temporary Mapping pointer */
+   AstPermMap *permmap;          /* Pointer to PermMap */
+   AstSpecFluxFrame *target;     /* Pointer to target SpecFluxFrame structure */
+   int match;                    /* Coordinate conversion is possible? */
+   int perm[ 2 ];                /* Permutation array for axis swap */
+   int result_swap;              /* Swap result SpecFluxFrame coordinates? */
+   int target_swap;              /* Swap target SpecFluxFrame coordinates? */
+
+/* Initialise the returned values. */
+   *map = NULL;
+   *result = NULL;
+   match = 0;
+
+/* Check the global error status. */
+   if ( !astOK ) return match;
+
+/* If the template is not a SpecFluxFrame we use the parent SubFrame
+   method inherited form the CmpFrame class. */
+   if( !template || !astIsASpecFluxFrame( template ) || result_naxes != 2 ) {
+      match = (*parent_subframe)( target_frame, template, result_naxes,
+                                  target_axes, template_axes, map, result, status );
+
+/* Otherwise... */
+   } else {
+
+/* Obtain a pointer to the target SpecFluxFrame structure. */
+      target = (AstSpecFluxFrame *) target_frame;
+
+/* Form the result from a copy of the target and then permute its axes
+   into the order required. */
+      *result = astCopy( target );
+      astPermAxes( *result, target_axes );
+
+/* Overlay the template attributes on to the result SpecFrame. */
+      astOverlay( template, template_axes, *result );
+
+/* Generate a Mapping that takes account of changes in the coordinate
+   system (system, units, etc.) between the target SpecFluxFrame and the
+   result SpecFluxFrame. If this Mapping can be generated, set "match" to
+   indicate that coordinate conversion is possible. */
+      match = MakeSFMapping( target, (AstSpecFluxFrame *) *result, map, status );
+
+/* If a Mapping has been obtained, it will expect coordinate values to be
+   supplied in (flux,spec) pairs. Test whether we need to swap the
+   order of the target SpecFluxFrame coordinates to conform with this. */
+      if ( astOK && match ) {
+         target_swap = ( astValidateAxis( target, 0, 1, "astSubFrame" ) != 0 );
+
+/* Coordinates will also be delivered in (flux,spec) pairs, so check
+   to see whether the result SpecFluxFrame coordinate order should be
+   swapped. */
+         result_swap = ( target_swap != ( target_axes[ 0 ] != 0 ) );
+
+/* If either set of coordinates needs swapping, create a PermMap that
+   will swap a pair of coordinates. */
+         permmap = NULL;
+         if ( target_swap || result_swap ) {
+            perm[ 0 ] = 1;
+            perm[ 1 ] = 0;
+            permmap = astPermMap( 2, perm, 2, perm, NULL, "", status );
+         }
+
+/* If necessary, prefix this PermMap to the main Mapping. */
+         if ( target_swap ) {
+            tmpmap = (AstMapping *) astCmpMap( permmap, *map, 1, "", status );
+            *map = astAnnul( *map );
+            *map = tmpmap;
+         }
+
+/* Also, if necessary, append it to the main Mapping. */
+         if ( result_swap ) {
+            tmpmap = (AstMapping *) astCmpMap( *map, permmap, 1, "", status );
+            *map = astAnnul( *map );
+            *map = tmpmap;
+         }
+
+/* Annul the pointer to the PermMap (if created). */
+         if ( permmap ) permmap = astAnnul( permmap );
+      }
+   }
+
+/* If an error occurred, clean up by annulling the result pointers and
+   returning appropriate null values. */
+   if ( !astOK ) {
+      *map = astAnnul( *map );
+      *result = astAnnul( *result );
+      match = 0;
+   }
+
+/* Return the result. */
+   return match;
+}
+
+/* Functions which access class attributes. */
+/* ---------------------------------------- */
+/* Implement member functions to access the attributes associated with
+   the axes of a SpecFluxFrame using the private macros defined for this
+   purpose at the start of this file. */
+
+/* Copy constructor. */
+/* ----------------- */
+
+/* Destructor. */
+/* ----------- */
+
+/* Dump function. */
+/* -------------- */
+static void Dump( AstObject *this_object, AstChannel *channel, int *status ) {
+/*
+*  Name:
+*     Dump
+
+*  Purpose:
+*     Dump function for SpecFluxFrame 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 SpecFluxFrame class to an output Channel.
+
+*  Parameters:
+*     this
+*        Pointer to the SpecFluxFrame 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: */
+   AstSpecFluxFrame *this;            /* Pointer to the SpecFluxFrame structure */
+
+/* Check the global error status. */
+   if ( !astOK ) return;
+
+/* Obtain a pointer to the SpecFluxFrame structure. */
+   this = (AstSpecFluxFrame *) this_object;
+
+/* Write out values representing the instance variables for the
+   SpecFluxFrame 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. */
+
+}
+
+/* Standard class functions. */
+/* ========================= */
+/* Implement the astIsASpecFluxFrame and astCheckSpecFluxFrame functions using
+   the macros defined for this purpose in the "object.h" header file. */
+astMAKE_ISA(SpecFluxFrame,CmpFrame)
+astMAKE_CHECK(SpecFluxFrame)
+
+AstSpecFluxFrame *astSpecFluxFrame_( void *frame1_void, void *frame2_void,
+                                     const char *options, int *status, ...) {
+/*
+*++
+*  Name:
+c     astSpecFluxFrame
+f     AST_SPECFLUXFRAME
+
+*  Purpose:
+*     Create a SpecFluxFrame.
+
+*  Type:
+*     Public function.
+
+*  Synopsis:
+c     #include "specfluxframe.h"
+c     AstSpecFluxFrame *astSpecFluxFrame( AstSpecFrame *frame1, AstFluxFrame *frame2,
+c                                         const char *options, ... )
+f     RESULT = AST_SPECFLUXFRAME( FRAME1, FRAME2, OPTIONS, STATUS )
+
+*  Class Membership:
+*     SpecFluxFrame constructor.
+
+*  Description:
+*     This function creates a new SpecFluxFrame and optionally initialises
+*     its attributes.
+*
+*     A SpecFluxFrame combines a SpecFrame and a FluxFrame into a single
+*     2-dimensional compound Frame. Such a Frame can for instance be used
+*     to describe a Plot of a spectrum in which the first axis represents
+*     spectral position and the second axis represents flux.
+
+*  Parameters:
+c     frame1
+f     FRAME1 = INTEGER (Given)
+*        Pointer to the SpecFrame. This will form the first axis in the
+*        new SpecFluxFrame.
+c     frame2
+f     FRAME2 = INTEGER (Given)
+*        Pointer to the FluxFrame. This will form the second axis in the
+*        new SpecFluxFrame. The "SpecVal" attribute of this FluxFrame is
+*        not used by the SpecFluxFrame class and so may be set to AST__BAD
+*        when the FluxFrame is created.
+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 SpecFluxFrame. 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 SpecFluxFrame. 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     astSpecFluxFrame()
+f     AST_SPECFLUXFRAME = INTEGER
+*        A pointer to the new SpecFluxFrame.
+
+*  Notes:
+*     - The supplied Frame pointers are stored directly, rather than
+*     being used to create deep copies of the supplied Frames. This means
+*     that any subsequent changes made to the Frames via the supplied
+*     pointers will result in equivalent changes being visible in the
+*     SpecFluxFrame.
+*     - 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.
+
+*  Status Handling:
+*     The protected interface to this function includes an extra
+*     parameter at the end of the parameter list descirbed above. This
+*     parameter is a pointer to the integer inherited status
+*     variable: "int *status".
+
+*--
+
+*  Implementation Notes:
+*     - This function implements the basic SpecFluxFrame constructor which
+*     is available via the protected interface to the SpecFluxFrame class.
+*     A public interface is provided by the astSpecFluxFrameId_ 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
+*     "frame1" and "frame2" parameters are of type (void *) and are
+*     converted and validated within the function itself.
+*/
+
+/* Local Variables: */
+   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
+   AstSpecFluxFrame *new;        /* Pointer to new SpecFluxFrame */
+   AstFluxFrame *frame2;         /* Pointer to FluxFrame structure */
+   AstSpecFrame *frame1;         /* Pointer to SpecFrame structure */
+   va_list args;                 /* Variable argument list */
+
+/* Get a pointer to the thread specific global data structure. */
+   astGET_GLOBALS(NULL);
+
+/* Check the global status. */
+   new = NULL;
+   if ( !astOK ) return new;
+
+/* Obtain and validate pointers to the Frame structures provided. */
+   frame1 = astCheckSpecFrame( frame1_void );
+   frame2 = astCheckFluxFrame( frame2_void );
+   if ( astOK ) {
+
+/* Initialise the SpecFluxFrame, allocating memory and initialising the
+   virtual function table as well if necessary. */
+      new = astInitSpecFluxFrame( NULL, sizeof( AstSpecFluxFrame ), !class_init,
+                                  &class_vtab, "SpecFluxFrame", frame1, frame2 );
+
+/* 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
+   SpecFluxFrame'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 );
+      }
+   }
+
+/* Return a pointer to the new SpecFluxFrame. */
+   return new;
+}
+
+AstSpecFluxFrame *astSpecFluxFrameId_( void *frame1_void, void *frame2_void,
+                                       const char *options, ... ) {
+/*
+*  Name:
+*     astSpecFluxFrameId_
+
+*  Purpose:
+*     Create a SpecFluxFrame.
+
+*  Type:
+*     Private function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstSpecFluxFrame *astSpecFluxFrameId_( void *frame1_void, void *frame2_void,
+*                                            const char *options, ... )
+
+*  Class Membership:
+*     SpecFluxFrame constructor.
+
+*  Description:
+*     This function implements the external (public) interface to the
+*     astSpecFluxFrame constructor function. It returns an ID value
+*     (instead of a true C pointer) to external users, and must be
+*     provided because astSpecFluxFrame_ has a variable argument list which
+*     cannot be encapsulated in a macro (where this conversion would
+*     otherwise occur). For the same reason, the "frame1" and "frame2"
+*     parameters are of type (void *) and are converted and validated
+*     within the function itself.
+*
+*     The variable argument list also prevents this function from
+*     invoking astSpecFluxFrame_ directly, so it must be a
+*     re-implementation of it in all respects, except for the final
+*     conversion of the result to an ID value.
+
+*  Parameters:
+*     As for astSpecFluxFrame_.
+
+*  Returned Value:
+*     The ID value associated with the new SpecFluxFrame.
+*/
+
+/* Local Variables: */
+   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
+   AstSpecFluxFrame *new;        /* Pointer to new SpecFluxFrame */
+   AstSpecFrame *frame1;         /* Pointer to first Frame structure */
+   AstFluxFrame *frame2;         /* Pointer to second Frame structure */
+   va_list args;                 /* Variable argument list */
+
+   int *status;                  /* Get a pointer to the thread specific global data structure. */
+   astGET_GLOBALS(NULL);
+
+/* Pointer to inherited status value */
+
+/* Get a pointer to the inherited status value. */
+   status = astGetStatusPtr;
+
+/* Check the global status. */
+   new = NULL;
+   if ( !astOK ) return new;
+
+/* Obtain the Frame pointers from the ID's supplied and validate the
+   pointers to ensure they identify valid Frames. */
+   frame1 = astVerifySpecFrame( astMakePointer( frame1_void ) );
+   frame2 = astVerifyFluxFrame( astMakePointer( frame2_void ) );
+   if ( astOK ) {
+
+/* Initialise the SpecFluxFrame, allocating memory and initialising the
+   virtual function table as well if necessary. */
+      new = astInitSpecFluxFrame( NULL, sizeof( AstSpecFluxFrame ), !class_init,
+                                  &class_vtab, "SpecFluxFrame", frame1, frame2 );
+
+/* 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
+   SpecFluxFrame'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 );
+      }
+   }
+
+/* Return an ID value for the new SpecFluxFrame. */
+   return astMakeId( new );
+}
+
+AstSpecFluxFrame *astInitSpecFluxFrame_( void *mem, size_t size, int init,
+                               AstSpecFluxFrameVtab *vtab, const char *name,
+                               AstSpecFrame *frame1, AstFluxFrame *frame2, int *status ) {
+/*
+*+
+*  Name:
+*     astInitSpecFluxFrame
+
+*  Purpose:
+*     Initialise a SpecFluxFrame.
+
+*  Type:
+*     Protected function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstSpecFluxFrame *astInitSpecFluxFrame( void *mem, size_t size, int init,
+*                                 AstSpecFluxFrameVtab *vtab, const char *name,
+*                                 AstSpecFrame *frame1, AstFluxFrame *frame2 )
+
+*  Class Membership:
+*     SpecFluxFrame initialiser.
+
+*  Description:
+*     This function is provided for use by class implementations to
+*     initialise a new SpecFluxFrame object. It allocates memory (if
+*     necessary) to accommodate the SpecFluxFrame plus any additional data
+*     associated with the derived class.  It then initialises a
+*     SpecFluxFrame 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 SpecFluxFrame at the start of the memory passed
+*     via the "vtab" parameter.
+
+*  Parameters:
+*     mem
+*        A pointer to the memory in which the SpecFluxFrame is to be
+*        created. This must be of sufficient size to accommodate the
+*        SpecFluxFrame data (sizeof(SpecFluxFrame)) 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 SpecFluxFrame (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 SpecFluxFrame structure, so a valid value must be
+*        supplied even if not required for allocating memory.
+*     init
+*        A logical flag indicating if the SpecFluxFrame'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 SpecFluxFrame.
+*     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).
+*     frame1
+*        Pointer to the SpecFrame
+*     frame2
+*        Pointer to the FluxFrame
+
+*  Returned Value:
+*     A pointer to the new SpecFluxFrame.
+
+*  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: */
+   AstSpecFluxFrame *new;        /* Pointer to new SpecFluxFrame */
+
+/* Check the global status. */
+   if ( !astOK ) return NULL;
+
+/* If necessary, initialise the virtual function table. */
+   if ( init ) astInitSpecFluxFrameVtab( vtab, name );
+
+/* Initialise a Frame structure (the parent class) as the first
+   component within the SpecFluxFrame structure, allocating memory if
+   necessary. Set the number of Frame axes to zero, since all axis
+   information is stored within the component Frames. */
+   new = astInitCmpFrame( mem, size, 0, (AstCmpFrameVtab *) vtab, name,
+                          frame1, frame2 );
+   if ( astOK ) {
+
+
+/* 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;
+}
+
+AstSpecFluxFrame *astLoadSpecFluxFrame_( void *mem, size_t size,
+                                 AstSpecFluxFrameVtab *vtab, const char *name,
+                                 AstChannel *channel, int *status ) {
+/*
+*+
+*  Name:
+*     astLoadSpecFluxFrame
+
+*  Purpose:
+*     Load a SpecFluxFrame.
+
+*  Type:
+*     Protected function.
+
+*  Synopsis:
+*     #include "specfluxframe.h"
+*     AstSpecFluxFrame *astLoadSpecFluxFrame( void *mem, size_t size,
+*                                   AstSpecFluxFrameVtab *vtab, const char *name,
+*                                   AstChannel *channel )
+
+*  Class Membership:
+*     SpecFluxFrame loader.
+
+*  Description:
+*     This function is provided to load a new SpecFluxFrame 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
+*     SpecFluxFrame structure in this memory, using data read from the
+*     input Channel.
+
+*  Parameters:
+*     mem
+*        A pointer to the memory into which the SpecFluxFrame is to be
+*        loaded.  This must be of sufficient size to accommodate the
+*        SpecFluxFrame data (sizeof(SpecFluxFrame)) 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 SpecFluxFrame (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 SpecFluxFrame 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(AstSpecFluxFrame) is used instead.
+*     vtab
+*        Pointer to the start of the virtual function table to be
+*        associated with the new SpecFluxFrame. If this is NULL, a pointer
+*        to the (static) virtual function table for the SpecFluxFrame 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 "SpecFluxFrame" is used instead.
+
+*  Returned Value:
+*     A pointer to the new SpecFluxFrame.
+
+*  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 Constants: */
+   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
+#define KEY_LEN 50               /* Maximum length of a keyword */
+
+/* Local Variables: */
+   AstSpecFluxFrame *new;        /* Pointer to the new SpecFluxFrame */
+
+/* Initialise. */
+   new = NULL;
+
+/* Get a pointer to the thread specific global data structure. */
+   astGET_GLOBALS(channel);
+
+/* Check the global error status. */
+   if ( !astOK ) return new;
+
+/* If a NULL virtual function table has been supplied, then this is
+   the first loader to be invoked for this SpecFluxFrame. In this case the
+   SpecFluxFrame belongs to this class, so supply appropriate values to be
+   passed to the parent class loader (and its parent, etc.). */
+   if ( !vtab ) {
+      size = sizeof( AstSpecFluxFrame );
+      vtab = &class_vtab;
+      name = "SpecFluxFrame";
+
+/* If required, initialise the virtual function table for this class. */
+      if ( !class_init ) {
+         astInitSpecFluxFrameVtab( 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 SpecFluxFrame. */
+   new = astLoadCmpFrame( mem, size, (AstCmpFrameVtab *) 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, "SpecFluxFrame" );
+
+/* 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. */
+/*  (none)  */
+
+/* If an error occurred, clean up by deleting the new SpecFluxFrame. */
+      if ( !astOK ) new = astDelete( new );
+   }
+
+/* Return the new SpecFluxFrame pointer. */
+   return new;
+
+/* Undefine macros local to this function. */
+#undef KEY_LEN
+}
+
+/* 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. */
+
+
+
+
+