upgrade AST

1 files changed, 0 insertions, 3703 deletions

diff --git a/ast/stc.c b/ast/stc.c
deleted file mode 100644
index 08e4392..0000000
--- a/ast/stc.c
+++ /dev/null
@@ -1,3703 +0,0 @@
-/*
-*class++
-*  Name:
-*     Stc
-
-*  Purpose:
-*     Represents an instance of the IVOA STC class.
-
-*  Constructor Function:
-c     astStc
-f     AST_STC
-
-*  Description:
-*     The Stc class is an implementation of the IVOA STC class which forms
-*     part of the IVOA Space-Time Coordinate Metadata system. See:
-*
-*     http://hea-www.harvard.edu/~arots/nvometa/STC.html
-*
-*     The Stc class does not have a constructor function of its own, as it
-*     is simply a container class for a family of specialised sub-classes
-*     including StcCatalogEntryLocation, StcResourceProfile, StcSearchLocation
-*     and StcObsDataLocation.
-
-*  Inheritance:
-*     The Stc class inherits from the Region class.
-
-*  Attributes:
-*     In addition to those attributes common to all Regions, every
-*     Stc also has the following attributes:
-*
-*     - RegionClass: The class name of the encapsulated Region.
-
-*  Functions:
-c     In addition to those functions applicable to all Regions, the
-c     following functions may also be applied to all Stc's:
-f     In addition to those routines applicable to all Regions, the
-f     following routines may also be applied to all Stc's:
-*
-c     - astGetStcRegion: Get a pointer to the encapsulated Region
-f     - AST_GETSTCREGION: Get a pointer to the encapsulated Region
-c     - astGetStcCoord: Get information about an AstroCoords element
-f     - AST_GETSTCCOORD: Get information about an AstroCoords element
-c     - astGetStcNCoord: Returns the number of AstroCoords elements in an Stc
-f     - AST_GETSTCNCOORD: Returns the number of AstroCoords elements in an Stc
-
-*  Copyright:
-*     Copyright (C) 1997-2006 Council for the Central Laboratory of the
-*     Research Councils
-*     Copyright (C) 2008 Science & Technology Facilities Council.
-*     All Rights Reserved.
-
-*  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:
-*     23-NOV-2004 (DSB):
-*        Original version.
-*     14-FEB-2006 (DSB):
-*        Override astGetObjSize.
-*     13-MAR-2009 (DSB):
-*        Over-ride astRegBasePick.
-*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 Stc
-
-/* The number of components in an AstroCoords element which are described
-   using a Region within a KeyMap. */
-#define NREG 5
-
-/* 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 "unitmap.h"             /* Unit Mappings */
-#include "region.h"              /* Regions (parent class) */
-#include "channel.h"             /* I/O channels */
-#include "stc.h"                 /* Interface definition for this class */
-#include "keymap.h"              /* Lists of value/key pairs */
-#include "pointlist.h"           /* Individual points in a Frame */
-#include "ellipse.h"             /* Ellipses within a Frame */
-#include "interval.h"            /* Axis intervals within a Frame */
-#include "prism.h"               /* Extrusions into higher dimensions */
-
-/* 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 AstMapping *(* parent_simplify)( AstMapping *, int * );
-static AstPointSet *(* parent_transform)( AstMapping *, AstPointSet *, int, AstPointSet *, int * );
-static AstRegion *(* parent_getdefunc)( AstRegion *, int * );
-static const char *(* parent_getattrib)( AstObject *, const char *, int * );
-static int (* parent_equal)( AstObject *, AstObject *, int * );
-static int (* parent_getobjsize)( AstObject *, int * );
-static int (* parent_getusedefs)( AstObject *, int * );
-static int (* parent_testattrib)( AstObject *, const char *, int * );
-static void (* parent_clearattrib)( AstObject *, const char *, int * );
-static void (* parent_setattrib)( AstObject *, const char *, int * );
-static void (* parent_setregfs)( AstRegion *, AstFrame *, int * );
-static void (*parent_regclearattrib)( AstRegion *, const char *, char **, int * );
-static void (*parent_regsetattrib)( AstRegion *, const char *, char **, int * );
-
-static void (* parent_clearnegated)( AstRegion *, int * );
-static void (* parent_clearclosed)( AstRegion *, int * );
-static void (* parent_clearfillfactor)( AstRegion *, int * );
-static void (* parent_clearmeshsize)( AstRegion *, int * );
-
-static void (* parent_setclosed)( AstRegion *, int, int * );
-static void (* parent_setfillfactor)( AstRegion *, double, int * );
-static void (* parent_setmeshsize)( AstRegion *, int, int * );
-static void (* parent_setnegated)( AstRegion *, int, int * );
-
-#if defined(THREAD_SAFE)
-static int (* parent_managelock)( AstObject *, int, int, AstObject **, int * );
-#endif
-
-/* The keys associated with each component of an AstroCoords element
-   within KeyMap */
-static const char *regkey[ NREG ] = { AST__STCERROR,
-                                      AST__STCRES,
-                                      AST__STCSIZE,
-                                      AST__STCPIXSZ,
-                                      AST__STCVALUE };
-
-/* The comments associated with each component of an AstroCoords element
-   within KeyMap */
-static const char *regcom[ NREG ] = { "AstroCoords error region",
-                                      "AstroCoords resolution region",
-                                      "AstroCoords size region",
-                                      "AstroCoords pixel size region",
-                                      "AstroCoords value region" };
-
-
-#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(Stc)
-
-/* Define macros for accessing each item of thread specific global data. */
-#define class_init astGLOBAL(Stc,Class_Init)
-#define class_vtab astGLOBAL(Stc,Class_Vtab)
-
-
-#include <pthread.h>
-
-
-#else
-
-
-/* Define the class virtual function table and its initialisation flag
-   as static variables. */
-static AstStcVtab class_vtab;   /* Virtual function table */
-static int class_init = 0;       /* Virtual function table initialised? */
-
-#endif
-
-/* External Interface Function Prototypes. */
-/* ======================================= */
-
-/* Prototypes for Private Member Functions. */
-/* ======================================== */
-static AstKeyMap *GetStcCoord( AstStc *, int, int * );
-static AstKeyMap *MakeAstroCoordsKeyMap( AstRegion *, AstKeyMap *, const char *, int * );
-static AstMapping *Simplify( AstMapping *, int * );
-static AstPointSet *RegBaseMesh( AstRegion *, int * );
-static AstPointSet *Transform( AstMapping *, AstPointSet *, int, AstPointSet *, int * );
-static AstRegion *GetDefUnc( AstRegion *, int * );
-static AstRegion *GetStcRegion( AstStc *, int * );
-static AstRegion *RegBasePick( AstRegion *this, int, const int *, int * );
-static const char *GetRegionClass( AstStc *, int * );
-static int Equal( AstObject *, AstObject *, int * );
-static int GetBounded( AstRegion *, int * );
-static int GetObjSize( AstObject *, int * );
-static int GetStcNCoord( AstStc *, int * );
-static int GetUseDefs( AstObject *, int * );
-static int Overlap( AstRegion *, AstRegion *, int * );
-static int OverlapX( AstRegion *, AstRegion *, int * );
-static int RegPins( AstRegion *, AstPointSet *, AstRegion *, int **, int * );
-static void Copy( const AstObject *, AstObject *, int * );
-static void Delete( AstObject *, int * );
-static void Dump( AstObject *, AstChannel *, int * );
-static void GetRegion( AstStc *, AstRegion **, int *, int * );
-static void RegBaseBox( AstRegion *, double *, double *, int * );
-static void RegClearAttrib( AstRegion *, const char *, char **, int * );
-static void RegSetAttrib( AstRegion *, const char *, char **, int * );
-static void SetRegFS( AstRegion *, AstFrame *, int * );
-
-static void ClearAttrib( AstObject *, const char *, int * );
-static const char *GetAttrib( AstObject *, const char *, int * );
-static void SetAttrib( AstObject *, const char *, int * );
-static int TestAttrib( AstObject *, const char *, int * );
-
-static void ClearClosed( AstRegion *, int * );
-static int GetClosed( AstRegion *, int * );
-static void SetClosed( AstRegion *, int, int * );
-static int TestClosed( AstRegion *, int * );
-
-static void ClearMeshSize( AstRegion *, int * );
-static int GetMeshSize( AstRegion *, int * );
-static void SetMeshSize( AstRegion *, int, int * );
-static int TestMeshSize( AstRegion *, int * );
-
-static void ClearFillFactor( AstRegion *, int * );
-static double GetFillFactor( AstRegion *, int * );
-static void SetFillFactor( AstRegion *, double, int * );
-static int TestFillFactor( AstRegion *, int * );
-
-static void ClearNegated( AstRegion *, int * );
-static int GetNegated( AstRegion *, int * );
-static void SetNegated( AstRegion *, int, int * );
-static int TestNegated( AstRegion *, int * );
-
-#if defined(THREAD_SAFE)
-static int ManageLock( AstObject *, int, int, AstObject **, int * );
-#endif
-
-/* Member functions. */
-/* ================= */
-static void ClearAttrib( AstObject *this_object, const char *attrib, int *status ) {
-/*
-*  Name:
-*     ClearAttrib
-
-*  Purpose:
-*     Clear an attribute value for a Stc.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     void ClearAttrib( AstObject *this, const char *attrib, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astClearAttrib protected
-*     method inherited from the Region class).
-
-*  Description:
-*     This function clears the value of a specified attribute for a
-*     Stc, so that the default value will subsequently be used.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     attrib
-*        Pointer to a null terminated string specifying the attribute
-*        name.  This should be in lower case with no surrounding white
-*        space.
-*     status
-*        Pointer to the inherited status variable.
-
-*/
-
-/* Local Variables: */
-   AstStc *this;                 /* Pointer to the Stc structure */
-   int len;                      /* Length of attrib string */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain a pointer to the Stc structure. */
-   this = (AstStc *) this_object;
-
-/* Obtain the length of the "attrib" string. */
-   len = strlen( attrib );
-
-/* Check the attribute name and clear the appropriate attribute. */
-
-/* (none as yet) */
-/* ------------- */
-
-/* Read-only attributes. */
-/* --------------------- */
-/* Test if the attribute name matches any of the read-only attributes
-   of this class. If it does, then report an error. */
-   if ( !strcmp( attrib, "regionclass" ) ) {
-      astError( AST__NOWRT, "astClear: Invalid attempt to clear the \"%s\" "
-                "value for a %s.", status, attrib, astGetClass( this ) );
-      astError( AST__NOWRT, "This is a read-only attribute." , status);
-
-/* Not recognised. */
-/* --------------- */
-/* If the attribute is still not recognised, pass it on to the parent
-   method for further interpretation. */
-   } else {
-      (*parent_clearattrib)( this_object, attrib, status );
-   }
-}
-
-static int Equal( AstObject *this_object, AstObject *that_object, int *status ) {
-/*
-*  Name:
-*     Equal
-
-*  Purpose:
-*     Test if two Objects are equivalent.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int Equal( AstObject *this_object, AstObject *that_object, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astEqual protected
-*     method inherited from the Region class).
-
-*  Description:
-*     This function returns a boolean result (0 or 1) to indicate whether
-*     two Stcs are equivalent.
-
-*  Parameters:
-*     this
-*        Pointer to the first Stc.
-*     that
-*        Pointer to the second Stc.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     One if the Stcs are equivalent, zero otherwise.
-
-*  Notes:
-*     - The Stcs are equivalent if their encapsulated Region are
-*     equivalent, and if they have the same boolean operation, negation
-*     and closed flags.
-*     - 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: */
-   AstStc *that;
-   AstStc *this;
-   int result;
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Invoke the Equal method inherited from the parent Region class. This checks
-   that the Objects are both of the same class, and have the same Negated
-   and Closed flags (amongst other things). */
-   if( (*parent_equal)( this_object, that_object, status ) ) {
-
-/* Obtain pointers to the two Stc structures. */
-      this = (AstStc *) this_object;
-      that = (AstStc *) that_object;
-
-/* Test their encapsulated Region for equality. */
-      result = astEqual( this->region, that->region );
-   }
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = 0;
-
-/* Return the result, */
-   return result;
-}
-
-/*
-*  Name:
-*     MAKE_SET
-
-*  Purpose:
-*     Define a function to set an attribute value for a Stc.
-
-*  Type:
-*     Private macro.
-
-*  Synopsis:
-*     #include "stc.h"
-*     MAKE_SET(attribute,lattribute,type)
-
-*  Class Membership:
-*     Defined by the Stc class.
-
-*  Description:
-*     This macro expands to an implementation of a private member function
-*     of the form:
-*
-*        static void Set<Attribute>( AstRegion *this, <Type> value )
-*
-*     that sets the value of a specified Region attribute in the parent
-*     Region structure and also in the encapsulated Region.
-
-*  Parameters:
-*     attribute
-*        Name of the attribute, as it appears in the function name.
-*     lattribute
-*        Name of the attribute, all in lower case.
-*     type
-*        The C type of the attribute.
-*/
-
-/* Define the macro. */
-#define MAKE_SET(attribute,lattribute,type) \
-static void Set##attribute( AstRegion *this_region, type value, int *status ) { \
-\
-/* Local Variables: */ \
-   AstStc *this;         /* Pointer to the Stc structure */ \
-\
-/* Check the global error status. */ \
-   if ( !astOK ) return; \
-\
-/* Use the parent method to set the value in the parent Region structure. */ \
-   (*parent_set##lattribute)( this_region, value, status ); \
-\
-/* Also set the value in the encapsulated Region. */ \
-   this = (AstStc *) this_region; \
-   astSet##attribute( this->region, value ); \
-}
-
-/* Use the above macro to create accessors for the MeshSize, Closed and
-   FillFactor attributes. */
-MAKE_SET(FillFactor,fillfactor,double)
-MAKE_SET(MeshSize,meshsize,int)
-MAKE_SET(Closed,closed,int)
-MAKE_SET(Negated,negated,int)
-
-/* Undefine the macro. */
-#undef MAKE_SET
-
-/*
-*  Name:
-*     MAKE_CLEAR
-
-*  Purpose:
-*     Define a function to clear an attribute value for a Stc.
-
-*  Type:
-*     Private macro.
-
-*  Synopsis:
-*     #include "stc.h"
-*     MAKE_CLEAR(attribute,lattribute)
-
-*  Class Membership:
-*     Defined by the Stc class.
-
-*  Description:
-*     This macro expands to an implementation of a private member function
-*     of the form:
-*
-*        static void Clear<Attribute>( AstRegion *this )
-*
-*     that sets the value of a specified Region attribute in the parent
-*     Region structure and also in the encapsulated Region.
-
-*  Parameters:
-*     attribute
-*        Name of the attribute, as it appears in the function name.
-*     lattribute
-*        Name of the attribute, all in lower case.
-*/
-
-/* Define the macro. */
-#define MAKE_CLEAR(attribute,lattribute) \
-static void Clear##attribute( AstRegion *this_region, int *status ) { \
-\
-/* Local Variables: */ \
-   AstStc *this;         /* Pointer to the Stc structure */ \
-\
-/* Check the global error status. */ \
-   if ( !astOK ) return; \
-\
-/* Use the parent method to clear the value in the parent Region structure. */ \
-   (*parent_clear##lattribute)( this_region, status ); \
-\
-/* Also clear the value in the encapsulated Region. */ \
-   this = (AstStc *) this_region; \
-   astClear##attribute( this->region ); \
-}
-
-/* Use the above macro to create accessors for the MeshSize, Closed and
-   FillFactor attributes. */
-MAKE_CLEAR(FillFactor,fillfactor)
-MAKE_CLEAR(MeshSize,meshsize)
-MAKE_CLEAR(Closed,closed)
-MAKE_CLEAR(Negated,negated)
-
-/* Undefine the macro. */
-#undef MAKE_CLEAR
-
-
-/*
-*  Name:
-*     MAKE_GET
-
-*  Purpose:
-*     Define a function to get an attribute value for a Stc.
-
-*  Type:
-*     Private macro.
-
-*  Synopsis:
-*     #include "stc.h"
-*     MAKE_GET(attribute,type,bad)
-
-*  Class Membership:
-*     Defined by the Stc class.
-
-*  Description:
-*     This macro expands to an implementation of a private member function
-*     of the form:
-*
-*        static <Type> Get<Attribute>( AstRegion *this )
-*
-*     that gets the value of a specified Region attribute from the encapsulated
-*     Region.
-
-*  Parameters:
-*     attribute
-*        Name of the attribute, as it appears in the function name.
-*     type
-*        The C type of the attribute.
-*     bad
-*        Value to return in caseof error.
-*/
-
-/* Define the macro. */
-#define MAKE_GET(attribute,type,bad) \
-static type Get##attribute( AstRegion *this_region, int *status ) { \
-\
-/* Local Variables: */ \
-   AstStc *this;         /* Pointer to the Stc structure */ \
-\
-/* Check the global error status. */ \
-   if ( !astOK ) return (bad); \
-\
-/* Get the value from the encapsulated Region. */ \
-   this = (AstStc *) this_region; \
-   return astGet##attribute( this->region ); \
-}
-
-/* Use the above macro to create accessors for the MeshSize, Closed and
-   FillFactor attributes. */
-MAKE_GET(FillFactor,double,AST__BAD)
-MAKE_GET(MeshSize,int,100)
-MAKE_GET(Closed,int,1)
-MAKE_GET(Negated,int,0)
-
-/* Undefine the macro. */
-#undef MAKE_GET
-
-/*
-*  Name:
-*     MAKE_TEST
-
-*  Purpose:
-*     Define a function to test an attribute value for a Stc.
-
-*  Type:
-*     Private macro.
-
-*  Synopsis:
-*     #include "stc.h"
-*     MAKE_TEST(attribute)
-
-*  Class Membership:
-*     Defined by the Stc class.
-
-*  Description:
-*     This macro expands to an implementation of a private member function
-*     of the form:
-*
-*        static int Test<Attribute>( AstRegion *this )
-*
-*     that test the value of a specified Region attribute from the encapsulated
-*     Region.
-
-*  Parameters:
-*     attribute
-*        Name of the attribute, as it appears in the function name.
-*     type
-*        The C type of the attribute.
-*/
-
-/* Define the macro. */
-#define MAKE_TEST(attribute) \
-static int Test##attribute( AstRegion *this_region, int *status ) { \
-\
-/* Local Variables: */ \
-   AstStc *this;         /* Pointer to the Stc structure */ \
-\
-/* Check the global error status. */ \
-   if ( !astOK ) return 0; \
-\
-/* Test the value from the encapsulated Region. */ \
-   this = (AstStc *) this_region; \
-   return astTest##attribute( this->region ); \
-}
-
-/* Use the above macro to create accessors for the MeshSize, Closed and
-   FillFactor attributes. */
-MAKE_TEST(FillFactor)
-MAKE_TEST(MeshSize)
-MAKE_TEST(Closed)
-MAKE_TEST(Negated)
-
-/* Undefine the macro. */
-#undef MAKE_TEST
-
-
-
-
-static int GetObjSize( AstObject *this_object, int *status ) {
-/*
-*  Name:
-*     GetObjSize
-
-*  Purpose:
-*     Return the in-memory size of an Object.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int GetObjSize( AstObject *this, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astGetObjSize protected
-*     method inherited from the parent class).
-
-*  Description:
-*     This function returns the in-memory size of the supplied Stc,
-*     in bytes.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     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: */
-   AstStc *this;         /* Pointer to Stc structure */
-   int result;           /* Result value to return */
-   int i;                /* AstroCoords index */
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointers to the Stc structure. */
-   this = (AstStc *) this_object;
-
-/* Invoke the GetObjSize method inherited from the parent class, and then
-   add on any components of the class structure defined by thsi class
-   which are stored in dynamically allocated memory. */
-   result = (*parent_getobjsize)( this_object, status );
-   result += astGetObjSize( this->region );
-
-   if( this->coord ) {
-      for( i = 0; i < this->ncoord; i++ ) {
-         result += astGetObjSize( this->coord[ i ] );
-      }
-      result += astTSizeOf( this->coord );
-   }
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = 0;
-
-/* Return the result, */
-   return result;
-}
-
-static const char *GetAttrib( AstObject *this_object, const char *attrib, int *status ) {
-/*
-*  Name:
-*     GetAttrib
-
-*  Purpose:
-*     Get the value of a specified attribute for a Stc.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     const char *GetAttrib( AstObject *this, const char *attrib, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the protected astGetAttrib
-*     method inherited from the Region class).
-
-*  Description:
-*     This function returns a pointer to the value of a specified
-*     attribute for a Stc, formatted as a character string.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     attrib
-*        Pointer to a null-terminated string containing the name of
-*        the attribute whose value is required. This name should be in
-*        lower case, with all white space removed.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     - Pointer to a null-terminated string containing the attribute
-*     value.
-
-*  Notes:
-*     - The returned string pointer may point at memory allocated
-*     within the Stc, or at static memory. The contents of the
-*     string may be over-written or the pointer may become invalid
-*     following a further invocation of the same function or any
-*     modification of the Stc. A copy of the string should
-*     therefore be made if necessary.
-*     - 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: */
-   AstStc *this;                 /* Pointer to the Stc structure */
-   const char *result;           /* Pointer value to return */
-   int len;                      /* Length of attrib string */
-
-/* Initialise. */
-   result = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointer to the Stc structure. */
-   this = (AstStc *) this_object;
-
-/* Obtain the length of the attrib string. */
-   len = strlen( attrib );
-
-/* Compare "attrib" with each recognised attribute name in turn,
-   obtaining the value of the required attribute. If necessary, write
-   the value into "buff" as a null-terminated string in an appropriate
-   format.  Set "result" to point at the result string. */
-
-/* RegionClass. */
-/* ------------ */
-   if ( !strcmp( attrib, "regionclass" ) ) {
-      result = astGetClass( this->region );
-
-/* Not recognised. */
-/* --------------- */
-/* If the attribute name was not recognised, pass it on to the parent
-   method for further interpretation. */
-   } else {
-      result = (*parent_getattrib)( this_object, attrib, status );
-   }
-
-/* Return the result. */
-   return result;
-}
-
-static int GetBounded( AstRegion *this_region, int *status ) {
-/*
-*  Name:
-*     GetBounded
-
-*  Purpose:
-*     Is the Region bounded?
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int GetBounded( AstRegion *this, int *status )
-
-*  Class Membership:
-*     Stc method (over-rides the astGetBounded method inherited from
-*     the Region class).
-
-*  Description:
-*     This function returns a flag indicating if the Region is bounded.
-*     The implementation provided by the base Region class is suitable
-*     for Region sub-classes representing the inside of a single closed
-*     curve (e.g. Circle, Ellipse, Box, etc). Other sub-classes (such as
-*     Stc, PointList, etc ) may need to provide their own implementations.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     Non-zero if the Region is bounded. Zero otherwise.
-
-*/
-
-/* Local Variables: */
-   AstStc *this;              /* Pointer to Stc structure */
-   AstRegion *reg;            /* Pointer to the encapsulated Region */
-   int neg;                   /* Negated flag to use */
-   int neg_old;               /* Original Negated flag */
-   int result;                /* Returned result */
-
-/* Initialise */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Get a pointer to the Stc structure. */
-   this = (AstStc *) this_region;
-
-/* Get the encapsulated Region, and the Negated value which should be used
-   with it. The returned values take account of whether the supplied Stc has
-   itself been Negated or not. The returned Region represent a region within
-   the base Frame of the FrameSet encapsulated by the parent Region
-   structure. */
-   GetRegion( this, &reg, &neg, status );
-
-/* Temporarily set the Negated attribute to the required value.*/
-   neg_old = astGetNegated( reg );
-   astSetNegated( reg, neg );
-
-/* See if the encapsulated Region is bounded. */
-   result = astGetBounded( reg );
-
-/* Re-instate the original value for the Negated attribute of the
-   encapsulated Region. */
-   if( reg ) astSetNegated( reg, neg_old );
-
-/* Free resources. */
-   reg = astAnnul( reg );
-
-/* Return zero if an error occurred. */
-   if( !astOK ) result = 0;
-
-/* Return the required pointer. */
-   return result;
-}
-
-static AstRegion *GetDefUnc( AstRegion *this_region, int *status ) {
-/*
-*  Name:
-*     GetDefUnc
-
-*  Purpose:
-*     Obtain a pointer to the default uncertainty Region for a given Region.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     AstRegion *GetDefUnc( AstRegion *this )
-
-*  Class Membership:
-*     Stc method (over-rides the astGetDefUnc method inherited from
-*     the Region class).
-
-*     This function returns a pointer to a Region which represents the
-*     default uncertainty associated with a position on the boundary of the
-*     given  Region. The returned Region refers to the base Frame within the
-*     FrameSet encapsulated by the supplied Region.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-
-*  Returned Value:
-*     A pointer to the Region. This should be annulled (using astAnnul)
-*     when no longer needed.
-
-*  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: */
-   AstStc *this;              /* Pointer to the Stc structure */
-   AstRegion *result;         /* Returned pointer */
-
-/* Initialise */
-   result = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Get a pointer to the Stc structure. */
-   this = (AstStc *) this_region;
-
-/* If the encapsulated region has non-default uncertainty, use it as
-   the default uncertainty for the Cmpregion. Note, the current Frame of
-   an uncertainty Region is assumed to be the same as the base Frame in the
-   Stc. */
-   if( astTestUnc( this->region ) ) {
-      result = astGetUncFrm( this->region, AST__CURRENT );
-
-/* Otherwise, use the parent method to determine the default uncertainty. */
-   } else {
-      result = (* parent_getdefunc)( this_region, status );
-   }
-
-/* Return NULL if an error occurred. */
-   if( !astOK ) result = astAnnul( result );
-
-/* Return the required pointer. */
-   return result;
-}
-
-static void GetRegion( AstStc *this, AstRegion **reg, int *neg, int *status ) {
-/*
-*
-*  Name:
-*     GetRegion
-
-*  Purpose:
-*     Get the encapsulated Region of a Stc.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "region.h"
-*     void GetRegion( AstStc *this, AstRegion **reg, int *neg, int *status )
-
-*  Class Membership:
-*     Stc member function
-
-*  Description:
-*     This function returns a pointer to a Region which is equivalent to
-*     the supplied Stc. If the Stc has been negated, then the returned
-*     "negated" flag will be set such that it represents the negated Stc.
-*
-*     The current Frames in returned encapsulated Region will be equivalent
-*     to the base Frame in the FrameSet encapsulated by the parent Region
-*     structure.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     reg
-*        Address of a location to receive a pointer to the encapsulated
-*        Region. The current Frame in this region will be equivalent to
-*        the base Frame in the FrameSet
-*     neg
-*        The value of the Negated attribute to be used with reg.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Notes:
-*     - Any changes made to the encapsulated Region using the returned
-*     pointer will be reflected in the supplied Stc.
-
-*/
-
-/* Initialise */
-   if( reg ) *reg = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Return the component Region pointers. */
-   if( reg ) *reg = astClone( this->region );
-
-/* Initialise the other returned items. Note, the Stc initialiser stored a
-   deep copy of the supplied encapsulated Region, and so we do not
-   need to worry about attributes of the Region having been changed
-   after the creation of the Stc. This is different to the CmpMap
-   class which merely clones its supplied component pointers and so has
-   to save copies of the original Invert settings within the CmpMap
-   structure. */
-   if( neg ) *neg = astGetNegated( this->region );
-
-/* If the Stc has been inverted, we modify the boolean operator and
-   negation flags so that they reflect the inverted Stc. */
-   if( astGetNegated( this ) && neg ) *neg = *neg ? 0 : 1;
-}
-
-static const char *GetRegionClass( AstStc *this, int *status ){
-/*
-*+
-*  Name:
-*     astGetRegionClass
-
-*  Purpose:
-*     Get the value of a RegionClass attribute for a Stc.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     const char *astGetRegionClass( AstStc *this )
-
-*  Class Membership:
-*     Stc virtual function
-
-*  Description:
-*     This function returns a pointer to the value of the RegionClass
-*     attribute for a Stc.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-
-*  Returned Value:
-*     - Pointer to a null-terminated string containing the attribute
-*     value.
-
-*  Notes:
-*     - The returned string pointer may point at memory allocated
-*     within the Stc, or at static memory. The contents of the
-*     string may be over-written or the pointer may become invalid
-*     following a further invocation of the same function or any
-*     modification of the Stc. A copy of the string should
-*     therefore be made if necessary.
-*     - 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.
-*-
-*/
-
-/* Check the global error status. */
-   if ( !astOK ) return NULL;
-
-/* Obtain and return the class of the encapsulated Region. */
-   return astGetClass( ((AstStc *) this)->region );
-}
-
-
-static AstKeyMap *GetStcCoord( AstStc *this, int icoord, int *status ){
-/*
-*++
-*  Name:
-c     astGetStcCoord
-f     AST_GETSTCCOORD
-
-*  Purpose:
-*     Return information about an AstroCoords element stored in an Stc.
-
-*  Type:
-*     Public virtual function.
-
-*  Synopsis:
-c     #include "specframe.h"
-c     AstKeyMap *astGetStcCoord( AstStc *this, int icoord )
-f     RESULT = AST_GETSTCCOORD( THIS, ICOORD, STATUS )
-
-*  Class Membership:
-*     Stc method.
-
-*  Description:
-*     When any sub-class of Stc is created, the constructor function
-*     allows one or more AstroCoords elements to be stored within the Stc.
-*     This function allows any one of these AstroCoords elements to be
-*     retrieved. The format of the returned information is the same as
-*     that used to pass the original information to the Stc constructor.
-*     That is, the information is returned in a KeyMap structure
-*     containing elements with one or more of the keys given by symbolic
-*     constants AST__STCNAME, AST__STCVALUE, AST__STCERROR, AST__STCRES,
-*     AST__STCSIZE and AST__STCPIXSZ.
-*
-*     If the coordinate system represented by the Stc has been changed
-*     since it was created (for instance, by changing its System
-*     attribute), then the sizes and positions in the returned KeyMap
-*     will reflect the change in coordinate system.
-
-*  Parameters:
-c     this
-f     THIS = INTEGER (Given)
-*        Pointer to the Stc.
-c     icoord
-f     ICOORD = INTEGER (Given)
-*        The index of the AstroCoords element required. The first has index
-*        one. The number of AstroCoords elements in the Stc can be found using
-c        function astGetStcNcoord.
-f        function AST_GETSTCNCOORD.
-f     STATUS = INTEGER (Given and Returned)
-f        The global status.
-
-*  Returned Value:
-c     astGetStcCoord()
-f     AST_GETSTCCOORD = INTEGER
-*        A pointer to a new KeyMap containing the required information.
-
-*  Notes:
-*     - 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.
-*--
-*/
-
-/* Local Variables: */
-   AstFrame *frm;
-   AstKeyMap *result;
-   AstMapping *map;
-   AstMapping *smap;
-   AstObject *obj;
-   AstRegion *reg;
-   AstRegion *rereg;
-   AstRegion *srereg;
-   int ikey;
-   int nc;
-
-/* Initialise. */
-   result = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Validate the supplied index. */
-   nc = astGetStcNCoord( this );
-   if( icoord < 1 || icoord > nc ) {
-      astError( AST__STCIND, "astGetStcCoord(%s): Supplied AstroCoords "
-                "index (%d) is invalid.", status, astGetClass( this ), icoord );
-
-      if( icoord < 1 ) {
-         astError( AST__STCIND, "The index of the first AstroCoord "
-                   "element is one, not zero." , status);
-      } else if( nc == 0 ) {
-         astError( AST__STCIND, "There are no AstroCoords elements in "
-                   "the supplied %s.", status, astGetClass( this ) );
-      } else if( nc == 1 ) {
-         astError( AST__STCIND, "There is 1 AstroCoords element in "
-                   "the supplied %s.", status, astGetClass( this ) );
-      } else {
-         astError( AST__STCIND, "There are %d AstroCoords elements in "
-                   "the supplied %s.", status, nc, astGetClass( this ) );
-      }
-
-/* If the index is OK, initialise the returned KeyMap to be a copy of the
-   KeyMap holding information about the required AstroCoords element.*/
-   } else {
-      result = astCopy( this->coord[ icoord - 1 ] );
-
-/* The Regions stored within this KeyMap describe regions within the base
-   Frame of the parent Region structure. If the Mapping from base to current
-   Frame in the parent Region structure is not a UnitMap, we need to
-   change these to represent regions within the current Frame of the
-   parent Region structure. */
-      map = astGetMapping( ((AstRegion *)this)->frameset,
-                           AST__BASE, AST__CURRENT );
-      smap = astSimplify( map );
-      frm = astGetFrame( ((AstRegion *)this)->frameset, AST__CURRENT );
-
-/* If the Frame represented by the Region has changed, erase the Names
-   element since they may no longer be correct. */
-      if( !astIsAUnitMap( smap ) ) astMapRemove( result, AST__STCNAME );
-
-/* Loop round keys for which a Region may be stored in the KeyMap. */
-      for( ikey = 0; ikey < NREG; ikey++ ) {
-
-/* If the KeyMap contains a Region for this key, get a pointer to it. */
-         if( astMapGet0A( result, regkey[ ikey ], &obj ) ){
-            reg = (AstRegion *) obj;
-
-/* Sets its RegionFS attribute so that the encapsulated FrameSet will be
-   included in any dump of the Region. This is needed since the returned
-   Region pointer will have no parent Region from which the FrameSet can
-   be determined. */
-            astSetRegionFS( reg, 1 );
-
-/* If necessary, remap the Region into the current Frame, and simplify. */
-            if( !astIsAUnitMap( smap ) ) {
-               rereg = astMapRegion( reg, smap, frm );
-               srereg = astSimplify( rereg );
-               rereg = astAnnul( rereg );
-            } else {
-               srereg = astClone( reg );
-            }
-
-/* Replace the Region in the KeyMap with the remapped Region. */
-            astMapPut0A( result, regkey[ ikey ], srereg, NULL );
-
-/* Free resources */
-            reg = astAnnul( reg );
-            srereg = astAnnul( srereg );
-         }
-      }
-
-      frm = astAnnul( frm );
-      map = astAnnul( map );
-      smap = astAnnul( smap );
-
-/* Annul the returned KeyMap if an error has occurred. */
-      if( !astOK ) result = astAnnul( result );
-   }
-
-/* Return the pointer */
-   return result;
-
-}
-
-static int GetStcNCoord( AstStc *this, int *status ){
-/*
-*++
-*  Name:
-c     astGetStcNCoord
-f     AST_GETSTCNCOORD
-
-*  Purpose:
-*     Return the number of AstroCoords elements stored in an Stc.
-
-*  Type:
-*     Public virtual function.
-
-*  Synopsis:
-c     #include "stc.h"
-c     int astGetStcNCoord( AstStc *this )
-f     RESULT = AST_GETSTCNCOORD( THIS, STATUS )
-
-*  Class Membership:
-*     Stc method.
-
-*  Description:
-*     This function returns the number of AstroCoords elements stored in
-*     an Stc.
-
-*  Parameters:
-c     this
-f     THIS = INTEGER (Given)
-*        Pointer to the Stc.
-f     STATUS = INTEGER (Given and Returned)
-f        The global status.
-
-*  Returned Value:
-c     astGetStcNCoord()
-f     AST_GETSTCNCOORD = INTEGER
-*        The number of  AstroCoords elements stored in the Stc.
-
-*  Notes:
-*     - Zero 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.
-*--
-*/
-
-/* Return the required value. */
-   return astOK ? this->ncoord : 0;
-
-}
-
-static AstRegion *GetStcRegion( AstStc *this, int *status ) {
-/*
-*++
-*  Name:
-c     astGetStcRegion
-f     AST_GETSTCREGION
-
-*  Purpose:
-*     Obtain a copy of the encapsulated Region within a Stc.
-
-*  Type:
-*     Public virtual function.
-
-*  Synopsis:
-c     #include "stc.h"
-c     AstRegion *astGetStcRegion( AstStc *this )
-f     RESULT = AST_GETSTCREGION( THIS, STATUS )
-
-*  Class Membership:
-*     Region method.
-
-*  Description:
-*     This function returns a pointer to a deep copy of the Region
-*     supplied when the Stc was created.
-
-*  Parameters:
-c     this
-f     THIS = INTEGER (Given)
-*        Pointer to the Stc.
-f     STATUS = INTEGER (Given and Returned)
-f        The global status.
-
-*  Returned Value:
-c     astGetStcRegion()
-f     AST_GETSTCREGION = INTEGER
-*        A pointer to a deep copy of the Region encapsulated within the
-*        supplied Stc.
-
-*  Notes:
-*     - 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.
-*--
-*/
-
-/* Check the global error status. */
-   if ( !astOK ) return NULL;
-
-/* Return a pointer to a copy of the encapsulated Region. */
-   return astCopy( this->region );
-}
-
-static int GetUseDefs( AstObject *this_object, int *status ) {
-/*
-*  Name:
-*     GetUseDefs
-
-*  Purpose:
-*     Get the value of the UseDefs attribute for a Stc.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int GetUseDefs( AstObject *this_object, int *status ) {
-
-*  Class Membership:
-*     Stc member function (over-rides the protected astGetUseDefs
-*     method inherited from the Region class).
-
-*  Description:
-*     This function returns the value of the UseDefs attribute for a
-*     Stc, supplying a suitable default.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     - The USeDefs value.
-*/
-
-/* Local Variables: */
-   AstStc *this;                 /* Pointer to the Stc structure */
-   int result;                   /* Value to return */
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointer to the Stc structure. */
-   this = (AstStc *) this_object;
-
-/* If the UseDefs value for the Stc has been set explicitly, use the
-   Get method inherited from the parent Region class to get its value. */
-   if( astTestUseDefs( this ) ) {
-      result = (*parent_getusedefs)( this_object, status );
-
-/* Otherwise, supply a default value equal to the UseDefs value of the
-   encapsulated Region. */
-   } else {
-      result = astGetUseDefs( this->region );
-   }
-
-/* Return the result. */
-   return result;
-}
-
-void astInitStcVtab_(  AstStcVtab *vtab, const char *name, int *status ) {
-/*
-*+
-*  Name:
-*     astInitStcVtab
-
-*  Purpose:
-*     Initialise a virtual function table for a Stc.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     void astInitStcVtab( AstStcVtab *vtab, const char *name )
-
-*  Class Membership:
-*     Stc vtab initialiser.
-
-*  Description:
-*     This function initialises the component of a virtual function
-*     table which is used by the Stc 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 */
-   AstRegionVtab *region;        /* Pointer to Region 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. */
-   astInitRegionVtab( (AstRegionVtab *) vtab, name );
-
-/* Store a unique "magic" value in the virtual function table. This
-   will be used (by astIsAStc) 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 = &(((AstRegionVtab *) vtab)->id);
-
-/* Initialise member function pointers. */
-/* ------------------------------------ */
-/* Store pointers to the member functions (implemented here) that
-   provide virtual methods for this class. */
-
-   vtab->GetRegionClass = GetRegionClass;
-   vtab->GetStcRegion = GetStcRegion;
-   vtab->GetStcCoord = GetStcCoord;
-   vtab->GetStcNCoord = GetStcNCoord;
-
-/* 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;
-   region = (AstRegionVtab *) vtab;
-
-   parent_getobjsize = object->GetObjSize;
-   object->GetObjSize = GetObjSize;
-
-#if defined(THREAD_SAFE)
-   parent_managelock = object->ManageLock;
-   object->ManageLock = ManageLock;
-#endif
-
-   parent_clearattrib = object->ClearAttrib;
-   object->ClearAttrib = ClearAttrib;
-
-   parent_getattrib = object->GetAttrib;
-   object->GetAttrib = GetAttrib;
-
-   parent_setattrib = object->SetAttrib;
-   object->SetAttrib = SetAttrib;
-
-   parent_testattrib = object->TestAttrib;
-   object->TestAttrib = TestAttrib;
-
-   parent_transform = mapping->Transform;
-   mapping->Transform = Transform;
-
-   parent_simplify = mapping->Simplify;
-   mapping->Simplify = Simplify;
-
-   parent_setregfs = region->SetRegFS;
-   region->SetRegFS = SetRegFS;
-
-   parent_equal = object->Equal;
-   object->Equal = Equal;
-
-   parent_clearclosed = region->ClearClosed;
-   region->ClearClosed = ClearClosed;
-
-   parent_setclosed = region->SetClosed;
-   region->SetClosed = SetClosed;
-
-   region->TestClosed = TestClosed;
-   region->GetClosed = GetClosed;
-
-   parent_regsetattrib = region->RegSetAttrib;
-   region->RegSetAttrib = RegSetAttrib;
-
-   parent_regclearattrib = region->RegClearAttrib;
-   region->RegClearAttrib = RegClearAttrib;
-
-   parent_clearnegated = region->ClearNegated;
-   region->ClearNegated = ClearNegated;
-
-   parent_setnegated = region->SetNegated;
-   region->SetNegated = SetNegated;
-
-   region->TestNegated = TestNegated;
-   region->GetNegated = GetNegated;
-
-   parent_setmeshsize = region->SetMeshSize;
-   region->SetMeshSize = SetMeshSize;
-
-   parent_clearmeshsize = region->ClearMeshSize;
-   region->ClearMeshSize = ClearMeshSize;
-
-   region->TestMeshSize = TestMeshSize;
-   region->GetMeshSize = GetMeshSize;
-
-   parent_setfillfactor = region->SetFillFactor;
-   region->SetFillFactor = SetFillFactor;
-
-   parent_clearfillfactor = region->ClearFillFactor;
-   region->ClearFillFactor = ClearFillFactor;
-
-   region->TestFillFactor = TestFillFactor;
-   region->GetFillFactor = GetFillFactor;
-
-   parent_getusedefs = object->GetUseDefs;
-   object->GetUseDefs = GetUseDefs;
-
-   parent_getdefunc = region->GetDefUnc;
-   region->GetDefUnc = GetDefUnc;
-
-/* Store replacement pointers for methods which will be over-ridden by
-   new member functions implemented here. */
-   region->Overlap = Overlap;
-   region->OverlapX = OverlapX;
-   region->RegBaseBox = RegBaseBox;
-   region->RegBaseMesh = RegBaseMesh;
-   region->RegBasePick = RegBasePick;
-   region->RegPins = RegPins;
-   region->GetBounded = GetBounded;
-
-/* Declare the copy constructor, destructor and class dump function. */
-   astSetCopy( vtab, Copy );
-   astSetDelete( vtab, Delete );
-   astSetDump( vtab, Dump, "Stc", "An IVOA Space-Time-Coords object" );
-
-/* 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 AstKeyMap *MakeAstroCoordsKeyMap( AstRegion *reg, AstKeyMap *coord,
-                                         const char *class, int *status ){
-/*
-*  Name:
-*     MakeAstroCoordsKeyMap
-
-*  Purpose:
-*     Create a new KeyMap holding Regions describing a supplied
-*     AstroCoords element.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     AstKeyMap *MakeAstroCoordsKeyMap( AstRegion *reg, AstKeyMap *coord,
-*                                       const char *class, int *status )
-
-*  Class Membership:
-*     Stc member function
-
-*  Description:
-*     This function returns a pointer to a new KeyMap containing elements
-*     which correspond to the components of an STC AstroCoords element.
-*     The element with key AST__STCNAME holds a vector of character
-*     strings containing the names associated with each of the axies.
-*     The other elements of the returned KeyMap such as AST__STCERROR,
-*     AST__STCRES, etc, hold pointers to Regions describing the error
-*     box, resolution, etc, in the Frame of the supplied Region "reg".
-
-*  Parameters:
-*     reg
-*        Pointer to the Region in which the AstroCoords is defined.
-*     coordId
-*        An ID (not a pointer) to a KeyMap defining a single <AstroCoords>
-*        element, having elements with keys given by constants AST__STCNAME,
-*        AST__STCVALUE, AST__STCERROR, AST__STCRES, AST__STCSIZE,
-*        AST__STCPIXSZ. Any of these elements may be omitted, but no other
-*        elements should be included. If supplied, the AST__STCNAME element
-*        should be a vector of character string pointers holding the "Name"
-*        item for each axis. Any other supplied elements should be scalar
-*        elements, each  holding a pointer to a Region describing the
-*        associated item of ancillary information (error, resolution, size,
-*        pixel size or value). These Regions should refer to the coordinate
-*        system represented by "region".
-*     class
-*        Pointer to a string holding the STC class name.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     - Pointer to the new KeyMap.
-
-*  Notes:
-*     - A NULL pointer will be returned if this function is invoked
-*     with the global error status set, or if it should fail for any
-*     reason.
-*/
-
-/* Local Variables: */
-   AstFrame *frm;                /* Pointer to current Frame */
-   AstFrameSet *fs;              /* Pointer to conversion FrameSet */
-   AstKeyMap *result;            /* Pointer value to return */
-   AstMapping *map;              /* Pointer to conversion Mapping */
-   AstObject *obj;               /* Pointer to Object stored in supplied KeyMap */
-   AstRegion *areg;              /* Pointer to remapped Region */
-   AstRegion *sareg;             /* Pointer to simplified remapped Region */
-   const char *key;              /* Current key */
-   int j;                        /* Index of key within KeyMap */
-   int naxes;                    /* Number of axes in region */
-   int nkey;                     /* Number of keys in supplied KeyMap */
-   int nv;                       /* Number of values in KeyMap element */
-   int type;                     /* Data type of entry */
-
-/* Initialise. */
-   result = NULL;
-
-/* Check the global error status. */
-   if( !astOK ) return result;
-
-/* Confirm it is a genuine KeyMap pointer. */
-   if( !astIsAKeyMap( coord ) && astOK ) {
-      astError( AST__STCKEY, "astInitStc(%s): Supplied pointer is for "
-                "a %s, not a KeyMap.", status, class, astGetClass( coord ) );
-   }
-
-/* Initialise the new KeyMap to be a copy of the supplied KeyMap. */
-   result = astCopy( coord );
-
-/* Check the supplied KeyMap is usable. */
-   naxes = astGetNaxes( reg );
-   nkey = astMapSize( result );
-   for( j = 0; j < nkey; j++ ) {
-      key = astMapKey( result, j );
-      if( key ) {
-         nv = astMapLength( result, key );
-         type = astMapType( result, key );
-
-/* Check no unknown keys are present in the KeyMap. */
-         if( strcmp( key, AST__STCNAME ) &&
-             strcmp( key, AST__STCVALUE ) &&
-             strcmp( key, AST__STCERROR ) &&
-             strcmp( key, AST__STCRES ) &&
-             strcmp( key, AST__STCSIZE ) &&
-             strcmp( key, AST__STCPIXSZ ) ) {
-            astError( AST__STCKEY, "astInitStc(%s): Unknown key "
-                      "\"%s\" supplied in an AstroCoords list.", status,
-                      class, key );
-            break;
-
-/* Check that the "Name" element is a vector of "naxes" strings. */
-         } else if( !strcmp( key, AST__STCNAME ) ) {
-            if( nv != naxes ) {
-               astError( AST__STCKEY, "astInitStc(%s): %d \"%s\" "
-                         "values supplied in an AstroCoords list, but "
-                         "the Stc has %d axes. ", status, class, nv, key,
-                         naxes );
-               break;
-
-            } else if( type != AST__STRINGTYPE ) {
-               astError( AST__STCKEY, "astInitStc(%s): The \"%s\" "
-                         "values supplied in an AstroCoords list are "
-                         "not character strings. ", status, class, key );
-               break;
-            }
-
-/* Check that all other elements are scalar. */
-         } else if( nv != 1 ) {
-            astError( AST__STCKEY, "astInitStc(%s): %d \"%s\" "
-                      "values supplied in an AstroCoords list, but "
-                      "only one is allowed. ", status, class, nv, key );
-            break;
-
-/* Check that all other elements are AST Object pointers. */
-         } else if( type != AST__OBJECTTYPE ) {
-            astError( AST__STCKEY, "astInitStc(%s): The \"%s\" "
-                      "value supplied in an AstroCoords list is "
-                      "not an AST Object pointer. ", status, class, key );
-            break;
-
-/* Check that the Object pointers are not NULL. */
-         } else {
-            astMapGet0A( result, key, &obj );
-            if( astOK ) {
-               if( !obj ) {
-                  astError( AST__STCKEY, "astInitStc(%s): The \"%s\" "
-                            "value supplied in an AstroCoords list is "
-                            "a NULL pointer. ", status, class, key );
-                  break;
-
-/* Check that the Object pointers are Region pointers. */
-               } else if( !astIsARegion( obj ) ){
-                  astError( AST__STCKEY, "astInitStc(%s): The \"%s\" "
-                            "value supplied in an AstroCoords list is "
-                            "a %s, not a Region. ", status, class, key,
-                            astGetClass(obj) );
-                  obj = astAnnul( obj );
-                  break;
-
-/* Check that the Region pointers can be converted to the coordinate
-   system represented by the supplied Region. */
-               } else {
-                  fs = astConvert( obj, reg, "" );
-                  if( !fs ) {
-                     obj = astAnnul( obj );
-                     astError( AST__STCKEY, "astInitStc(%s): The \"%s\" "
-                               "value supplied in an AstroCoords list "
-                               "cannot be converted to the coordinate "
-                               "system of its parent Stc object.", status, class,
-                               key );
-                     break;
-
-/* If necessary, map the Region into the same frame as the supplied
-   Region, and replace the Region in the returned KeyMap with the
-   remapped Region. Also set the RegionFS attribute to indicate that the
-   FrameSet in the Region does not need to be dumped if it contains a
-   UnitMap. */
-                  } else {
-                     map = astGetMapping( fs, AST__BASE, AST__CURRENT );
-                     if( !astIsAUnitMap( map ) ) {
-                        frm = astGetFrame( fs, AST__CURRENT );
-                        areg = astMapRegion( (AstRegion *) obj, map, frm );
-                        sareg = astSimplify( areg );
-                        astSetRegionFS( sareg, 0 );
-                        astMapPut0A( result, key, sareg, NULL );
-                        areg = astAnnul( areg );
-                        sareg = astAnnul( sareg );
-                        frm = astAnnul( frm );
-                     } else {
-                        astSetRegionFS( (AstRegion *) obj, 0 );
-                     }
-                     map = astAnnul( map );
-                     fs = astAnnul( fs );
-
-                  }
-                  obj = astAnnul( obj );
-               }
-            }
-         }
-      }
-   }
-
-/* Free the returned KeyMap if an error has occurred. */
-   if( !astOK ) result = astAnnul( result );
-
-/* Return the result */
-   return result;
-
-}
-
-#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:
-*     Stc 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: */
-   AstStc *this;       /* Pointer to STC 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 STC structure. */
-   this = (AstStc *) 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->region, mode, extra, fail );
-   for( i = 0; i < this->ncoord; i++ ) {
-      if( !result ) result = astManageLock( this->coord[ i ], mode,
-                                            extra, fail );
-   }
-
-   return result;
-
-}
-#endif
-
-static int Overlap( AstRegion *this, AstRegion *that, int *status ){
-/*
-*  Name:
-*     Overlap
-
-*  Purpose:
-*     Test if two regions overlap each other.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int Overlap( AstRegion *this, AstRegion *that, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astOverlap method inherited
-*     from the Region class).
-
-*  Description:
-*     This function returns an integer value indicating if the two
-*     supplied Regions overlap. The two Regions are converted to a commnon
-*     coordinate system before performing the check. If this conversion is
-*     not possible (for instance because the two Regions represent areas in
-*     different domains), then the check cannot be performed and a zero value
-*     is returned to indicate this.
-
-*  Parameters:
-*     this
-*        Pointer to the first Region.
-*     that
-*        Pointer to the second Region.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     astOverlap()
-*        A value indicating if there is any overlap between the two Regions.
-*        Possible values are:
-*
-*        0 - The check could not be performed because the second Region
-*            could not be mapped into the coordinate system of the first
-*            Region.
-*
-*        1 - There is no overlap between the two Regions.
-*
-*        2 - The first Region is completely inside the second Region.
-*
-*        3 - The second Region is completely inside the first Region.
-*
-*        4 - There is partial overlap between the two Regions.
-*
-*        5 - The Regions are identical.
-*
-*        6 - The second Region is the negation of the first Region.
-
-*  Notes:
-*     - The returned values 5 and 6 do not check the value of the Closed
-*     attribute in the two Regions.
-*     - A value of zero will be returned if this function is invoked with the
-*     AST error status set, or if it should fail for any reason.
-
-*/
-
-/* Check the inherited status. */
-   if ( !astOK ) return 0;
-
-/* Invoke the "astOverlap" method on the encapsulated Region. */
-   return astOverlap( ((AstStc *)this)->region, that );
-}
-
-static int OverlapX( AstRegion *that, AstRegion *this, int *status ){
-/*
-*  Name:
-*     OverlapX
-
-*  Purpose:
-*     Test if two regions overlap each other.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int OverlapX( AstRegion *that, AstRegion *this )
-
-*  Class Membership:
-*     Stc member function (over-rides the astOverlapX method inherited
-*     from the Region class).
-
-*  Description:
-*     This function performs the processing for the public astOverlap
-*     method and has exactly the same interface except that the order
-*     of the two arguments is swapped. This is a trick to allow
-*     the astOverlap method to be over-ridden by derived classes on
-*     the basis of the class of either of its two arguments.
-*
-*     See the astOverlap method for details of the interface.
-
-*/
-
-/* Local Variables: */
-   int result;
-
-/* Check the inherited status. */
-   if ( !astOK ) return 0;
-
-/* Invoke the "astOverlapX" method on the encapsulated Region. */
-   result = astOverlap( ((AstStc *)that)->region, this );
-
-/* Swap the returned values 2 and 3 to take account of the swapping of
-   the regions.*/
-   if( result == 2 ) {
-      result = 3;
-   } else if( result == 3 ) {
-      result = 2;
-   }
-
-/* Return the result. */
-   return result;
-}
-
-static void RegBaseBox( AstRegion *this, double *lbnd, double *ubnd, int *status ){
-/*
-*  Name:
-*     RegBaseBox
-
-*  Purpose:
-*     Returns the bounding box of an un-negated Region in the base Frame of
-*     the encapsulated FrameSet.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     void RegBaseBox( AstRegion *this, double *lbnd, double *ubnd, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astRegBaseBox protected
-*     method inherited from the Region class).
-
-*  Description:
-*     This function returns the upper and lower axis bounds of a Region in
-*     the base Frame of the encapsulated FrameSet, assuming the Region
-*     has not been negated. That is, the value of the Negated attribute
-*     is ignored.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-*     lbnd
-*        Pointer to an array in which to return the lower axis bounds
-*        covered by the Region in the base Frame of the encapsulated
-*        FrameSet. It should have at least as many elements as there are
-*        axes in the base Frame.
-*     ubnd
-*        Pointer to an array in which to return the upper axis bounds
-*        covered by the Region in the base Frame of the encapsulated
-*        FrameSet. It should have at least as many elements as there are
-*        axes in the base Frame.
-*     status
-*        Pointer to the inherited status variable.
-
-*/
-
-/* Check the global error status. */
-   if( !astOK ) return;
-
-/* Invoke the method on the encapsulated Region. */
-   astRegBaseBox( ((AstStc *)this)->region, lbnd, ubnd );
-}
-
-static AstPointSet *RegBaseMesh( AstRegion *this, int *status ){
-/*
-*  Name:
-*     RegBaseMesh
-
-*  Purpose:
-*     Create a new PointSet containing a mesh of points on the boundary of a
-*     Region in its base Frame.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     AstPointSet *astRegBaseMesh( AstRegion *this, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astRegBaseMesh protected
-*     method inherited from the Region class).
-
-*  Description:
-*     This function creates a new PointSet containing a mesh of points on the
-*     boundary of the Region. The points refer to the base Frame of
-*     the encapsulated FrameSet.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     Pointer to the PointSet. Annul the pointer using astAnnul when it
-*     is no longer needed.
-
-*  Notes:
-*    - A NULL pointer is returned if an error has already occurred, or if
-*    this function should fail for any reason.
-
-*/
-
-/* Check the global error status. */
-   if( !astOK ) return NULL;
-
-/* Invoke the astRegMesh method on the encapsulated Region. This returns
-   a mesh in the current Frame of the encapsulated Region which is the same
-   as the base Frame of the Stc Region. */
-   return astRegMesh( ((AstStc *)this)->region );
-}
-
-static AstRegion *RegBasePick( AstRegion *this_region, int naxes,
-                               const int *axes, int *status ){
-/*
-*  Name:
-*     RegBasePick
-
-*  Purpose:
-*     Return a Region formed by picking selected base Frame axes from the
-*     supplied Region.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     AstRegion *RegBasePick( AstRegion *this, int naxes, const int *axes,
-*                             int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astRegBasePick protected
-*     method inherited from the Region class).
-
-*  Description:
-*     This function attempts to return a Region that is spanned by selected
-*     axes from the base Frame of the encapsulated FrameSet of the supplied
-*     Region. This may or may not be possible, depending on the class of
-*     Region. If it is not possible a NULL pointer is returned.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-*     naxes
-*        The number of base Frame axes to select.
-*     axes
-*        An array holding the zero-based indices of the base Frame axes
-*        that are to be selected.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     Pointer to the Region, or NULL if no region can be formed.
-
-*  Notes:
-*    - A NULL pointer is returned if an error has already occurred, or if
-*    this function should fail for any reason.
-*/
-
-/* Check the global error status. */
-   if ( !astOK ) return NULL;
-
-/* Invoke the astRegBaePick method on the encapsulated Region. */
-   return astRegBasePick( ((AstStc *)this_region)->region, naxes, axes );
-}
-
-static void RegClearAttrib( AstRegion *this_region, const char *attrib,
-                            char **base_attrib, int *status ) {
-/*
-*  Name:
-*     RegClearAttrib
-
-*  Purpose:
-*     Clear an attribute value for a Region.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     void RegClearAttrib( AstRegion *this, const char *attrib,
-*                          char **base_attrib, int *status )
-
-*  Class Membership:
-*     Stc method (over-rides the astRegClearAttrib method inherited from
-*     the Region class).
-
-*  Description:
-*     This function clears the value of an attribute in both the base and
-*     current Frame in the FrameSet encapsulated within a Region, without
-*     remapping either Frame.
-*
-*     No error is reported if the attribute is not recognised by the base
-*     Frame.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-*     attrib
-*        Pointer to a null terminated string containing an attribute name.
-*        NOTE, IT SHOULD BE ENTIRELY LOWER CASE.
-*     base_attrib
-*        Address of a location at which to return a pointer to the null
-*        terminated string holding the name of the attribute which was
-*        cleared in the base Frame of the encapsulated FrameSet. This may
-*        differ from the supplied name if the supplied name contains an axis
-*        index and the current->base Mapping in the FrameSet produces an
-*        axis permutation. The returned pointer should be freed using
-*        astFree when no longer needed. A NULL pointer may be supplied in
-*        which case no pointer is returned.
-*     status
-*        Pointer to the inherited status variable.
-
-*/
-
-/* Local Variables: */
-   AstStc *this;
-   char *batt;
-   int rep;
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Get a pointer to the Stc  structure. */
-   this = (AstStc *) this_region;
-
-/* Use the RegClearAttrib method inherited from the parent class to clear
-   the attribute in the current and base Frames in the FrameSet encapsulated
-   by the parent Region structure. */
-   (*parent_regclearattrib)( this_region, attrib, &batt, status );
-
-/* Now clear the base Frame attribute in the encapsulated Region (the current
-   Frame within the encapsulated Region is equivalent to the base Frame in the
-   parent Region structure). Annul any "attribute unknown" error that results
-   from attempting to do this. */
-   if( astOK ) {
-      rep = astReporting( 0 );
-      astRegClearAttrib( this->region, batt, NULL );
-      if( astStatus == AST__BADAT ) astClearStatus;
-      astReporting( rep );
-   }
-
-/* If required, return the base Frame attribute name, otherwise free it. */
-   if( base_attrib ) {
-      *base_attrib = batt;
-   } else {
-      batt = astFree( batt );
-   }
-}
-
-static int RegPins( AstRegion *this, AstPointSet *pset, AstRegion *unc,
-                    int **mask, int *status ){
-/*
-*  Name:
-*     RegPins
-
-*  Purpose:
-*     Check if a set of points fall on the boundary of a given Stc.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int RegPins( AstRegion *this, AstPointSet *pset, AstRegion *unc,
-*                  int **mask, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astRegPins protected
-*     method inherited from the Region class).
-
-*  Description:
-*     This function returns a flag indicating if the supplied set of
-*     points all fall on the boundary of the given Stc.
-*
-*     Some tolerance is allowed, as specified by the uncertainty Region
-*     stored in the supplied Stc "this", and the supplied uncertainty
-*     Region "unc" which describes the uncertainty of the supplied points.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     pset
-*        Pointer to the PointSet. The points are assumed to refer to the
-*        base Frame of the FrameSet encapsulated by "this".
-*     unc
-*        Pointer to a Region representing the uncertainties in the points
-*        given by "pset". The Region is assumed to represent the base Frame
-*        of the FrameSet encapsulated by "this". Zero uncertainity is assumed
-*        if NULL is supplied.
-*     mask
-*        Pointer to location at which to return a pointer to a newly
-*        allocated dynamic array of ints. The number of elements in this
-*        array is equal to the value of the Npoint attribute of "pset".
-*        Each element in the returned array is set to 1 if the
-*        corresponding position in "pset" is on the boundary of the Region
-*        and is set to zero otherwise. A NULL value may be supplied
-*        in which case no array is created. If created, the array should
-*        be freed using astFree when no longer needed.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     Non-zero if the points all fall on the boundary of the given
-*     Region, to within the tolerance specified. Zero otherwise.
-
-*/
-
-/* Check the global error status. */
-   if( !astOK ) return 0;
-
-/* Invoke the method on the encapsulated Region. */
-   return astRegPins( ((AstStc *)this)->region, pset, unc, mask );
-}
-
-static void RegSetAttrib( AstRegion *this_region, const char *setting,
-                          char **base_setting, int *status ) {
-/*
-*  Name:
-*     RegSetAttrib
-
-*  Purpose:
-*     Set an attribute value for a Region.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     void RegSetAttrib( AstRegion *this, const char *setting,
-*                        char **base_setting, int *status )
-
-*  Class Membership:
-*     Stc method (over-rides the astRegSetAttrib method inherited from
-*     the Region class).
-
-*  Description:
-*     This function assigns an attribute value to both the base and
-*     current Frame in the FrameSet encapsulated within a Region, without
-*     remapping either Frame.
-*
-*     No error is reported if the attribute is not recognised by the base
-*     Frame.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-*     setting
-*        Pointer to a null terminated attribute setting string. NOTE, IT
-*        SHOULD BE ENTIRELY LOWER CASE. The supplied string will be
-*        interpreted using the public interpretation implemented by
-*        astSetAttrib. This can be different to the interpretation of the
-*        protected accessor functions. For instance, the public
-*        interpretation of an unqualified floating point value for the
-*        Epoch attribute is to interpet the value as a gregorian year,
-*        but the protected interpretation is to interpret the value as an
-*        MJD.
-*     base_setting
-*        Address of a location at which to return a pointer to the null
-*        terminated attribute setting string which was applied to the
-*        base Frame of the encapsulated FrameSet. This may differ from
-*        the supplied setting if the supplied setting contains an axis
-*        index and the current->base Mapping in the FrameSet produces an
-*        axis permutation. The returned pointer should be freed using
-*        astFree when no longer needed. A NULL pointer may be supplied in
-*        which case no pointer is returned.
-*     status
-*        Pointer to the inherited status variable.
-
-*/
-
-/* Local Variables: */
-   AstKeyMap *keymap;
-   AstObject *obj;
-   AstRegion *reg;
-   AstStc *this;
-   char *bset;
-   int i;
-   int ikey;
-   int rep;
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Get a pointer to the Stc structure. */
-   this = (AstStc *) this_region;
-
-/* Use the RegSetAttrib method inherited from the parent class to apply the
-   setting to the current and base Frames in the FrameSet encapsulated by the
-   parent Region structure. */
-   (*parent_regsetattrib)( this_region, setting, &bset, status );
-
-/* Now apply the base Frame setting to the encapsulated Region (the current
-   Frame within the encapsulated Region is equivalent to the base Frame in the
-   parent Region structure). Annul any "attribute unknown" error that results
-   from attempting to do this. Also do any AstroCoords in the Stc. */
-   if( astOK ) {
-      rep = astReporting( 0 );
-      astRegSetAttrib( this->region, bset, NULL );
-      if( astStatus == AST__BADAT ) astClearStatus;
-
-/* Loop round all AstroCoords elements. */
-      for( i = 0; i < this->ncoord; i++ ) {
-
-/* Get a pointer to the KeyMap holding a description of the current
-   AstroCoords element. */
-         keymap = this->coord[ i ];
-
-/* Loop round all the elements of this KeyMap which may hold a Region
-   pointer. */
-         for( ikey = 0; ikey < NREG; ikey++ ) {
-
-/* If the KeyMap contains a Region for this key, get a pointer to it. */
-            if( astMapGet0A( keymap, regkey[ ikey ], &obj ) ){
-               reg = (AstRegion *) obj;
-
-/* Modify it by applying the attribute setting. */
-               astRegSetAttrib( reg, bset, NULL );
-               if( astStatus == AST__BADAT ) astClearStatus;
-
-/* Annul the pointer. */
-               reg = astAnnul( reg );
-            }
-         }
-      }
-
-      astReporting( rep );
-   }
-
-/* If required, return the base Frame setting string, otherwise free it. */
-   if( base_setting ) {
-      *base_setting = bset;
-   } else {
-      bset = astFree( bset );
-   }
-}
-
-static void SetAttrib( AstObject *this_object, const char *setting, int *status ) {
-/*
-*  Name:
-*     SetAttrib
-
-*  Purpose:
-*     Set an attribute value for a Stc.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     void SetAttrib( AstObject *this, const char *setting, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astSetAttrib method inherited
-*     from the Region class).
-
-*  Description:
-*     This function assigns an attribute value for a Stc, the
-*     attribute and its value being specified by means of a string of
-*     the form:
-*
-*        "attribute= value "
-*
-*     Here, "attribute" specifies the attribute name and should be in
-*     lower case with no white space present. The value to the right
-*     of the "=" should be a suitable textual representation of the
-*     value to be assigned and this will be interpreted according to
-*     the attribute's data type.  White space surrounding the value is
-*     only significant for string attributes.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     setting
-*        Pointer to a null terminated string specifying the new attribute
-*        value.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Notes:
-*     - This function uses one-based axis numbering so that it is
-*     suitable for external (public) use.
-*/
-
-/* Local Vaiables: */
-   AstStc *this;                 /* Pointer to the Stc structure */
-   int len;                      /* Length of setting string */
-   int nc;                       /* Number of characters read by astSscanf */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain a pointer to the Stc structure. */
-   this = (AstStc *) this_object;
-
-/* Obtain the length of the setting string. */
-   len = strlen( setting );
-
-/* Test for each recognised attribute in turn, using "astSscanf" to parse the
-   setting string and extract the attribute value (or an offset to it in the
-   case of string values). In each case, use the value set in "nc" to check
-   that the entire string was matched. Once a value has been obtained, use the
-   appropriate method to set it. */
-
-/* (none as yet) */
-
-/* Read-only attributes. */
-/* --------------------- */
-/* Define a macro to see if the setting string matches any of the
-   read-only attributes of this class. */
-#define MATCH(attrib) \
-        ( nc = 0, ( 0 == astSscanf( setting, attrib "=%*[^\n]%n", &nc ) ) && \
-                  ( nc >= len ) )
-
-/* Use this macro to report an error if a read-only attribute has been
-   specified. */
-   if ( MATCH( "regionclass" ) ) {
-      astError( AST__NOWRT, "astSet: The setting \"%s\" is invalid for a %s.", status,
-                setting, astGetClass( this ) );
-      astError( AST__NOWRT, "This is a read-only attribute." , status);
-
-/* Not recognised. */
-/* --------------- */
-/* If the attribute is still not recognised, pass it on to the parent
-   method for further interpretation. */
-   } else {
-      (*parent_setattrib)( this_object, setting, status );
-   }
-
-/* Undefine macros local to this function. */
-#undef MATCH
-}
-
-static void SetRegFS( AstRegion *this_region, AstFrame *frm, int *status ) {
-/*
-*  Name:
-*     SetRegFS
-
-*  Purpose:
-*     Stores a new FrameSet in a Region
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     void SetRegFS( AstRegion *this_region, AstFrame *frm, int *status )
-
-*  Class Membership:
-*     Stc method (over-rides the astSetRegFS method inherited from
-*     the Region class).
-
-*  Description:
-*     This function creates a new FrameSet and stores it in the supplied
-*     Region. The new FrameSet contains two copies of the supplied
-*     Frame, connected by a UnitMap.
-
-*  Parameters:
-*     this
-*        Pointer to the Region.
-*     frm
-*        The Frame to use.
-*     status
-*        Pointer to the inherited status variable.
-
-*/
-
-/* Local Variables: */
-   AstRegion *creg;        /* Pointer to encapsulated Region structure */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Invoke the parent method to store the FrameSet in the parent Region
-   structure. */
-   (* parent_setregfs)( this_region, frm, status );
-
-/* If the encapsulated Region has a dummy FrameSet use this method
-   recursively to give it the same FrameSet. */
-   creg = ((AstStc *) this_region )->region;
-   if( creg && !astGetRegionFS( creg ) ) astSetRegFS( creg, frm );
-
-}
-
-static AstMapping *Simplify( AstMapping *this_mapping, int *status ) {
-/*
-*  Name:
-*     Simplify
-
-*  Purpose:
-*     Simplify a Region.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "region.h"
-*     AstMapping *Simplify( AstMapping *this, int *status )
-
-*  Class Membership:
-*     Stc method (over-rides the astSimplify method inherited from
-*     the Region class).
-
-*  Description:
-*     This function simplifies a Stc to eliminate redundant
-*     computational steps, or to merge separate steps which can be
-*     performed more efficiently in a single operation.
-
-*  Parameters:
-*     this
-*        Pointer to the original Region.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     A new pointer to the (possibly simplified) Region.
-
-*  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: */
-   AstFrame *frm;                /* Current Frame */
-   AstKeyMap *keymap;            /* KeyMap holding stroCoords element */
-   AstMapping *map;              /* Base->current Mapping */
-   AstObject *obj;               /* Pointer to object retrieved from keymap */
-   AstRegion *newreg;            /* New encapsulated Region */
-   AstRegion *reg;               /* AstroCoords Region pointer */
-   AstRegion *treg;              /* Temporary Region pointer */
-   AstStc *stc;                  /* Returned Stc Structure. */
-   AstStc *temp;                 /* Temporary Stc pointer */
-   int i;                        /* Index of current AstroCoords element */
-   int ikey;                     /* Index of key to be tested */
-
-/* Check the global error status. */
-   if ( !astOK ) return NULL;
-
-/* Invoke the Simplify method of the parent Region class. This simplifies
-   the FrameSet and uncertainty Region in the parent Region structure. */
-   stc = (AstStc *) (AstRegion *) (* parent_simplify)( this_mapping, status );
-
-/* If the Stc is negated, we can perform a simplication by transferring
-   the negated state from the Stc itself to the encapsulated Region. */
-   if( astGetNegated( stc ) ) {
-
-/* Ensure that modifying "stc" will not modify the supplied Stc, by
-   creating a copy of the supplied Stc, if this has not already been done. */
-      if( stc == (AstStc *) this_mapping ) {
-         temp = (AstStc *) astCopy( stc );
-         (void) astAnnul( stc );
-         stc = temp;
-      }
-
-/* Modify "temp" by negating both the Stc structure and its encapsulated
-   Region. */
-      astNegate( stc );
-      astNegate( stc->region );
-
-   }
-
-/* Get the base->current Mapping from the parent Region structure, and
-   the current Frame. */
-   map = astGetMapping( ((AstRegion *) stc)->frameset, AST__BASE, AST__CURRENT );
-   frm = astGetFrame( ((AstRegion *) stc)->frameset, AST__CURRENT );
-
-/* We may be able to perform some more simplication on the encapsulated
-   Region itself. If the above mapping is not a unit map, remap the
-   encapsulated Region into the current Frame of the parent Region structure
-   and simplify it. This transfers complication from the Mapping in the
-   parent Region structure to the encapsulated Region. */
-   if( !astIsAUnitMap( map ) ) {
-      treg = astMapRegion( stc->region, map, frm );
-      newreg = astSimplify( treg );
-      treg = astAnnul( treg );
-
-/* If the base->current Mapping in the parent Region structure is a unit
-   map, simplification of the whole Stc is possible if the encapsulated
-   Region (without any remapping) can be simplied. */
-   } else {
-      newreg = astSimplify( stc->region );
-   }
-
-/* If the encapsulated Region has been changed, store it in the returned
-   Stc. */
-   if( newreg != stc->region ) {
-
-/* Ensure that modifying "stc" will not modify the supplied Stc, by
-   creating a copy of the supplied Stc, if this has not already been done. */
-      if( stc == (AstStc *) this_mapping ) {
-         temp = (AstStc *) astCopy( stc );
-         (void) astAnnul( stc );
-         stc = temp;
-      }
-
-/* Store the new region in "stc", annulling the existing Region. */
-      if( stc ) {
-         (void) astAnnul( stc->region );
-         stc->region = astClone( newreg );
-      }
-
-/* The encapsulated Region now represents an area in the current Frame
-   represented by the supplied Stc. Since the encapsulated Region is
-   defined as being in the base Frame of the FrameSet in the parent
-   Region structure, the parent FrameSet should just be a UnitMap. Modify
-   it appropriately (if it not already a UnitMap). */
-      if( !astIsAUnitMap( map ) ) astSetRegFS( stc, frm );
-   }
-
-/* Free resources */
-   newreg = astAnnul( newreg );
-
-/* Now we do a similar process on any Regions held within an AstroCoords
-   elements. Loop round all AstroCoords elements. */
-   if( stc ) {
-      for( i = 0; i < stc->ncoord; i++ ) {
-
-/* Get a pointewr to the KeyMap holding a description of the current
-   AstroCoords element. */
-         keymap = stc->coord[ i ];
-
-/* Loop round all the elements of this KeyMap which may hold a Region
-   pointer. */
-         for( ikey = 0; ikey < NREG; ikey++ ) {
-
-/* If the KeyMap contains a Region for this key, get a pointer to it. */
-            if( astMapGet0A( keymap, regkey[ ikey ], &obj ) ){
-               reg = (AstRegion *) obj;
-
-/* We have two tasks now, firstly to ensure that this AstroCoords Region
-   describes an area in the base Frame of the FrameSet in the parent
-   Region structure (which may have been changed by the earlier
-   simplications performed by this function), and secondly, to attempt to
-   simplify the Region.
-
-   The Stc structure addressed by the "stc" pointer will have a current
-   Frame given by "frm". This will also be its base Frame, and the
-   base->current Mapping will consequently be a UnitMap. The Mapping from
-   the original base Frame to the new base Frame is given by "map". Unless
-   this is a UnitMap, we need to remap the Region.*/
-               if( !astIsAUnitMap( map ) ) {
-                  treg = astMapRegion( reg, map, frm );
-               } else {
-                  treg = astClone( reg );
-               }
-
-/* Now attempt to simplify the Region.*/
-               newreg = astSimplify( treg );
-
-/* If the Region has been changed by either of these steps, we need to
-   store the modified Region back in the "stc" structure which is being
-   returned. But we need to be careful we do not modify the supplied Stc
-   structure. */
-               if( newreg != reg ) {
-
-                  if( stc == (AstStc *) this_mapping ) {
-                     temp = astCopy( stc );
-                     (void) astAnnul( stc );
-                     stc = temp;
-                     keymap = temp->coord[ i ];
-                  }
-
-                  astMapPut0A( keymap, regkey[ ikey ], newreg, regcom[ ikey ] );
-
-               }
-
-/* Free resources */
-               reg = astAnnul( reg );
-               treg = astAnnul( treg );
-               newreg = astAnnul( newreg );
-
-            }
-         }
-      }
-   }
-
-/* Free resources */
-   map = astAnnul( map );
-   frm = astAnnul( frm );
-
-/* If an error occurred, annul the returned Mapping. */
-   if ( !astOK ) stc = astAnnul( stc );
-
-/* Return the result. */
-   return (AstMapping *) stc;
-}
-
-static int TestAttrib( AstObject *this_object, const char *attrib, int *status ) {
-/*
-*  Name:
-*     TestAttrib
-
-*  Purpose:
-*     Test if a specified attribute value is set for a Stc.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     int TestAttrib( AstObject *this, const char *attrib, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astTestAttrib protected
-*     method inherited from the Region class).
-
-*  Description:
-*     This function returns a boolean result (0 or 1) to indicate whether
-*     a value has been set for one of a Stc's attributes.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     attrib
-*        Pointer to a null terminated string specifying the attribute
-*        name.  This should be in lower case with no surrounding white
-*        space.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     One if a value has been set, otherwise zero.
-
-*  Notes:
-*     - This function uses one-based axis numbering so that it is
-*     suitable for external (public) use.
-*     - 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: */
-   AstStc *this;                 /* Pointer to the Stc structure */
-   int len;                      /* Length of attrib string */
-   int result;                   /* Result value to return */
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointer to the Stc structure. */
-   this = (AstStc *) this_object;
-
-/* Obtain the length of the attrib string. */
-   len = strlen( attrib );
-
-/* Check the attribute name and test the appropriate attribute. */
-
-/* Read-only attributes. */
-/* --------------------- */
-/* Test if the attribute name matches any of the read-only attributes
-   of this class. If it does, then return zero. */
-   if ( !strcmp( attrib, "regionclass" ) ) {
-      result = 0;
-
-/* Not recognised. */
-/* --------------- */
-/* If the attribute is still not recognised, pass it on to the parent
-   method for further interpretation. */
-   } else {
-      result = (*parent_testattrib)( this_object, attrib, status );
-   }
-
-/* Return the result, */
-   return result;
-}
-
-static AstPointSet *Transform( AstMapping *this_mapping, AstPointSet *in,
-                               int forward, AstPointSet *out, int *status ) {
-/*
-*  Name:
-*     Transform
-
-*  Purpose:
-*     Apply a Stc to transform a set of points.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     AstPointSet *Transform( AstMapping *this, AstPointSet *in,
-*                             int forward, AstPointSet *out, int *status )
-
-*  Class Membership:
-*     Stc member function (over-rides the astTransform method inherited
-*     from the Region class).
-
-*  Description:
-*     This function takes a Stc and a set of points encapsulated in a
-*     PointSet and transforms the points so as to apply the required Region.
-*     This implies applying each of the Stc's encapsulated Region in turn,
-*     either in series or in parallel.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc.
-*     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 Stc being applied.
-*     -  If an output PointSet is supplied, it must have space for sufficient
-*     number of points and coordinate values per point to accommodate the
-*     result. Any excess space will be ignored.
-*/
-
-/* Local Variables: */
-   AstPointSet *ps;              /* Pointer to PointSet */
-   AstPointSet *pset_tmp;        /* Pointer to PointSet holding base Frame positions*/
-   AstPointSet *result;          /* Pointer to output PointSet */
-   AstRegion *reg;               /* Pointer to encapsulated Region */
-   AstStc *this;                 /* Pointer to the Stc structure */
-   double **ptr;                 /* Pointer to axis values */
-   double **ptr_out;             /* Pointer to output coordinate data */
-   int coord;                    /* Zero-based index for coordinates */
-   int good;                     /* Is the point inside the Stc? */
-   int ncoord_out;               /* No. of coordinates per output point */
-   int ncoord_tmp;               /* No. of coordinates per base Frame point */
-   int neg;                      /* Negated value for encapsulated Region */
-   int neg_old;                  /* Original Negated flag */
-   int npoint;                   /* No. of points */
-   int point;                    /* Loop counter for points */
-   int rep;                      /* Original error reporting status */
-   int status_value;                   /* AST status value */
-
-/* Initialise. */
-   result = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Get a Pointer to the Stc structure */
-   this = (AstStc *) this_mapping;
-
-/* Get the encapsulated Region, and the Negated value which should be used
-   with it. The returned values take account of whether the supplied Stc has
-   itself been Negated or not. The returned Region represent a region within
-   the base Frame of the FrameSet encapsulated by the parent Region
-   structure. */
-   GetRegion( this, &reg, &neg, status );
-
-/* Temporarily set the Negated attribute to the required value.*/
-   neg_old = astGetNegated( reg );
-   astSetNegated( reg, neg );
-
-/* Apply the parent mapping using the stored pointer to the Transform member
-   function inherited from the parent Region class. This function validates
-   all arguments and generates an output PointSet if necessary, containing
-   a copy of the input PointSet. */
-   result = (*parent_transform)( this_mapping, in, forward, out, status );
-
-/* We will now extend the parent astTransform method by performing the
-   calculations needed to generate the output coordinate values. */
-
-/* First use the encapsulated FrameSet in the parent Region structure to
-   transform the supplied positions from the current Frame in the
-   encapsulated FrameSet (the Frame represented by the Stc), to the
-   base Frame (the Frame in which the encapsulated Region are defined). Note,
-   the returned pointer may be a clone of the "in" pointer, and so we
-   must be carefull not to modify the contents of the returned PointSet. */
-   pset_tmp = astRegTransform( this, in, 0, NULL, NULL );
-
-/* Now transform this PointSet using the encapsulated Region. */
-   ps = astTransform( reg, pset_tmp, 0, NULL );
-
-/* Determine the numbers of points and coordinates per point for these base
-   Frame PointSets and obtain pointers for accessing the base Frame and output
-   coordinate values. */
-   npoint = astGetNpoint( pset_tmp );
-   ncoord_tmp = astGetNcoord( pset_tmp );
-   ptr = astGetPoints( ps );
-   ncoord_out = astGetNcoord( result );
-   ptr_out = astGetPoints( result );
-
-/* Perform coordinate arithmetic. */
-/* ------------------------------ */
-   if ( astOK ) {
-
-      for ( point = 0; point < npoint; point++ ) {
-         good = 0;
-
-         for ( coord = 0; coord < ncoord_tmp; coord++ ) {
-            if( ptr[ coord ][ point ] != AST__BAD ) {
-               good = 1;
-               break;
-            }
-         }
-
-         if( !good ) {
-            for ( coord = 0; coord < ncoord_out; coord++ ) {
-               ptr_out[ coord ][ point ] = AST__BAD;
-            }
-         }
-      }
-   }
-
-/* Re-instate the original value for the Negated attribute of the
-   encapsulated Region. Do this even if an error has occurred. */
-   status_value = astStatus;
-   astClearStatus;
-   rep = astReporting( 0 );
-   if( reg ) astSetNegated( reg, neg_old );
-   astReporting( rep );
-   astSetStatus( status_value );
-
-/* Free resources. */
-   reg = astAnnul( reg );
-   ps = astAnnul( ps );
-   pset_tmp = astAnnul( pset_tmp );
-
-/* 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;
-}
-
-
-/* Stc Attributes: */
-/* =============== */
-
-/*
-*att++
-*  Name:
-*     RegionClass
-
-*  Purpose:
-*     The AST class name of the Region encapsulated within an Stc
-
-*  Type:
-*     Public attribute.
-
-*  Synopsis:
-*     String, read-only.
-
-*  Description:
-*     This is a read-only attribute giving the AST class name of the
-*     Region encapsulated within an Stc (that is, the class of the Region
-*     which was supplied when the Stc was created).
-
-*  Applicability:
-*     Stc
-*        All Stc objects this attribute.
-*att--
-*/
-
-/* Copy constructor. */
-/* ----------------- */
-static void Copy( const AstObject *objin, AstObject *objout, int *status ) {
-/*
-*  Name:
-*     Copy
-
-*  Purpose:
-*     Copy constructor for Stc objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Copy( const AstObject *objin, AstObject *objout, int *status )
-
-*  Description:
-*     This function implements the copy constructor for Stc 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
-*     Regions within the Stc.
-*/
-
-/* Local Variables: */
-   AstStc *in;                /* Pointer to input Stc */
-   AstStc *out;               /* Pointer to output Stc */
-   int i;                     /* AstroCoords index */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain pointers to the input and output Stcs. */
-   in = (AstStc *) objin;
-   out = (AstStc *) objout;
-
-/* For safety, start by clearing any references to the input component
-   Regions, etc,  from the output Stc. */
-   out->region = NULL;
-   out->coord = NULL;
-   out->ncoord = 0;
-
-/* Make a copy of the Region and store a pointer to it in the output Stc
-   structure. */
-   out->region = astCopy( in->region );
-
-/* Copy any memory holding AstroCoords values */
-   if( in->coord && in->ncoord ) {
-      out->ncoord = in->ncoord;
-      out->coord = astMalloc( sizeof(AstKeyMap *) * (size_t)in->ncoord );
-      if( out->coord ) {
-         for( i = 0; i < in->ncoord; i++ ) {
-            out->coord[ i ] = astCopy( in->coord[ i ] );
-         }
-      }
-   }
-}
-
-/* Destructor. */
-/* ----------- */
-static void Delete( AstObject *obj, int *status ) {
-/*
-*  Name:
-*     Delete
-
-*  Purpose:
-*     Destructor for Stc objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Delete( AstObject *obj, int *status )
-
-*  Description:
-*     This function implements the destructor for Stc 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: */
-   AstStc *this;              /* Pointer to Stc */
-   int i;                     /* AstroCoords index */
-
-/* Obtain a pointer to the Stc structure. */
-   this = (AstStc *) obj;
-
-/* Annul the pointer to the encapsulated Region. */
-   this->region = astAnnul( this->region );
-
-/* Free any memory holding AstroCoords values */
-   if( this->coord ) {
-      for( i = 0; i < this->ncoord; i++ ) {
-         this->coord[ i ] = astAnnul( this->coord[ i ] );
-      }
-      this->coord = astFree( this->coord );
-   }
-}
-
-/* Dump function. */
-/* -------------- */
-static void Dump( AstObject *this_object, AstChannel *channel, int *status ) {
-/*
-*  Name:
-*     Dump
-
-*  Purpose:
-*     Dump function for Stc 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 Stc class to an output Channel.
-
-*  Parameters:
-*     this
-*        Pointer to the Stc 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 Constants: */
-#define COMMENT_LEN 150          /* Maximum length of a comment string */
-#define KEY_LEN 50               /* Maximum length of a keyword */
-
-/* Local Variables: */
-   AstStc *this;                 /* Pointer to the Stc structure */
-   char comment[ COMMENT_LEN + 1 ]; /* Buffer for comment string */
-   char key[ KEY_LEN + 1 ];      /* Buffer for keyword string */
-   int ico;                      /* Loop counter for KeyMaps */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain a pointer to the Stc structure. */
-   this = (AstStc *) this_object;
-
-/* Write out values representing the instance variables for the Stc
-   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. */
-
-/* Encapsulated Region. */
-/* -------------------- */
-   astWriteObject( channel, "Region", 1, 1, this->region,
-                   "STC Region" );
-
-/* AstroCoords info */
-/* ---------------- */
-   astWriteInt( channel, "Ncoord", ( this->ncoord != 0 ), 0, this->ncoord,
-                "Number of AstroCoords elements" );
-
-   for ( ico = 1; ico <= this->ncoord; ico++ ) {
-      (void) sprintf( key, "Coord%d", ico );
-      (void) sprintf( comment, "AstroCoords number %d", ico );
-      astWriteObject( channel, key, 1, 1, this->coord[ ico - 1 ],
-                      comment );
-   }
-
-/* Undefine macros local to this function. */
-#undef COMMENT_LEN
-#undef KEY_LEN
-}
-
-/* Standard class functions. */
-/* ========================= */
-/* Implement the astIsAStc and astCheckStc functions using the
-   macros defined for this purpose in the "object.h" header file. */
-astMAKE_ISA(Stc,Region)
-astMAKE_CHECK(Stc)
-
-AstStc *astInitStc_( void *mem, size_t size, int init, AstStcVtab *vtab,
-                     const char *name, AstRegion *region, int ncoords,
-                     AstKeyMap **coords, int *status ) {
-/*
-*+
-*  Name:
-*     astInitStc
-
-*  Purpose:
-*     Initialise a Stc.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "stc.h"
-*      AstStc *astInitStc( void *mem, size_t size, int init, AstStcVtab *vtab,
-*                          const char *name, AstRegion *region, int ncoords,
-*                          AstKeyMap **coords )
-
-*  Class Membership:
-*     Stc initialiser.
-
-*  Description:
-*     This function is provided for use by class implementations to initialise
-*     a new Stc object. It allocates memory (if necessary) to
-*     accommodate the Stc plus any additional data associated with the
-*     derived class. It then initialises a Stc 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 Stc at the start of
-*     the memory passed via the "vtab" parameter.
-
-*  Parameters:
-*     mem
-*        A pointer to the memory in which the Stc is to be initialised.
-*        This must be of sufficient size to accommodate the Stc data
-*        (sizeof(Stc)) 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 Stc (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
-*        Stc structure, so a valid value must be supplied even if not
-*        required for allocating memory.
-*     init
-*        A logical flag indicating if the Stc'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 Stc.
-*     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).
-*     region
-*        Pointer to the Region represented by the Stc.
-*     ncoords
-*        Number of KeyMap pointers supplied in "coords". Can be zero.
-*        Ignored if "coords" is NULL.
-*     coords
-*        Pointer to an array of "ncoords" KeyMap pointers, or NULL if
-*        "ncoords" is zero. Each KeyMap defines defines a single <AstroCoords>
-*        element, and should have elements with keys given by constants
-*        AST__STCNAME, AST__STCVALUE, AST__STCERROR, AST__STCRES, AST__STCSIZE,
-*        AST__STCPIXSZ. Any of these elements may be omitted, but no other
-*        elements should be included. If supplied, the AST__STCNAME element
-*        should be a vector of character string pointers holding the "Name"
-*        item for each axis. Any other supplied elements should be scalar
-*        elements, each  holding a pointer to a Region describing the
-*        associated item of ancillary information (error, resolution, size,
-*        pixel size or value). These Regions should describe a volume within
-*        the coordinate system represented by "region".
-
-*  Returned Value:
-*     A pointer to the new Stc.
-
-*  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: */
-   AstMapping *frm;              /* Current Frame in supplied Stc */
-   AstMapping *map;              /* Base -> Current Mapping in supplied Stc */
-   AstRegion *reg;               /* Copy of supplied Region */
-   AstStc *new;                  /* Pointer to new Stc */
-   int i;                        /* AstroCoords index */
-
-/* Check the global status. */
-   if ( !astOK ) return NULL;
-
-/* If necessary, initialise the virtual function table. */
-   if ( init ) astInitStcVtab( vtab, name );
-
-/* Initialise. */
-   new = NULL;
-
-/* If the supplied Region is an Stc, create a new Region by mapping the
-   encapsulated Region within the supplied Stc into the current Frame of the
-   Stc. */
-   if( astIsAStc( region ) ) {
-      map = astGetMapping( region->frameset, AST__BASE, AST__CURRENT );
-      frm = astGetFrame( region->frameset, AST__CURRENT );
-      reg = astMapRegion( ((AstStc *) region)->region, map, frm );
-      frm = astAnnul( frm );
-      map = astAnnul( map );
-
-/* Otherwise, just take a copy of the supplied Region. */
-   } else {
-      reg = astCopy( region );
-   }
-
-/* Initialise a Region structure (the parent class) as the first component
-   within the Stc structure, allocating memory if necessary. A NULL
-   PointSet is suppled as the encapsulated Region will perform the function
-   of defining the Region shape. The base Frame of the FrameSet in the
-   parent Region structure will be the same as the current Frames of the
-   FrameSets in the two encapsulated Region. */
-   if ( astOK ) {
-      new = (AstStc *) astInitRegion( mem, size, 0, (AstRegionVtab *) vtab,
-                                      name, reg, NULL, NULL );
-
-/* Initialise the Stc data. */
-/* --------------------------- */
-/* Store a pointer to the encapsulated Region. */
-      new->region = astClone( reg );
-
-/* No AstroCoords info as yet. */
-      new->ncoord = 0;
-      new->coord = NULL;
-
-/* Transfer attributes from the encapsulated region to the parent region. */
-     astRegOverlay( new, reg, 1 );
-     if( astTestIdent( reg ) ) astSetIdent( new, astGetIdent( reg ) );
-
-/* If the base->current Mapping in the FrameSet within the encapsulated Region
-   is a UnitMap, then the FrameSet does not need to be included in the
-   Dump of the new Stc. Set the RegionFS attribute of the encapsulated
-   Region to zero to flag this. Note, we do this after the previous class
-   to astRegOverlay because we do not want this zero value for RegionFS to
-   be copied into the new Stc object. */
-      astSetRegionFS( reg, 0 );
-
-/* For each supplied AstroCoords, create a new KeyMap holding Regions
-   representing the various elements of the AstroCoords, and store the
-   new KeyMap in the Stc structure. */
-      if( coords && ncoords > 0 ) {
-         new->ncoord = ncoords;
-         new->coord = astMalloc( sizeof( AstKeyMap *)*(size_t) ncoords );
-         if( new->coord ) {
-            for( i = 0; i < ncoords; i++ ) {
-               new->coord[ i ] = MakeAstroCoordsKeyMap( reg, coords[ i ],
-                                                        name, status );
-            }
-         }
-      }
-
-/* If an error occurred, clean up deleting the new object. */
-      if ( !astOK ) new = astDelete( new );
-   }
-
-/* Free resources */
-   reg = astAnnul( reg );
-
-/* Return a pointer to the new object. */
-   return new;
-}
-
-AstStc *astLoadStc_( void *mem, size_t size, AstStcVtab *vtab,
-                     const char *name, AstChannel *channel, int *status ) {
-/*
-*+
-*  Name:
-*     astLoadStc
-
-*  Purpose:
-*     Load a Stc.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "stc.h"
-*     AstStc *astLoadStc( void *mem, size_t size, AstStcVtab *vtab,
-*                         const char *name, AstChannel *channel )
-
-*  Class Membership:
-*     Stc loader.
-
-*  Description:
-*     This function is provided to load a new Stc 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
-*     Stc 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 Stc at the start of the memory
-*     passed via the "vtab" parameter.
-
-*  Parameters:
-*     mem
-*        A pointer to the memory into which the Stc is to be
-*        loaded.  This must be of sufficient size to accommodate the
-*        Stc data (sizeof(Stc)) 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 Stc (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 Stc 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(AstStc) is used instead.
-*     vtab
-*        Pointer to the start of the virtual function table to be
-*        associated with the new Stc. If this is NULL, a pointer to
-*        the (static) virtual function table for the Stc 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 "Stc" is used instead.
-
-*  Returned Value:
-*     A pointer to the new Stc.
-
-*  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: */
-   AstFrame *f1;                 /* Base Frame in parent Region */
-   AstObject *obj;               /* Pointer to Object retrieved from KeyMap */
-   AstRegion *creg;              /* Pointer to encapsulated Region */
-   AstStc *new;                  /* Pointer to the new Stc */
-   char key[ KEY_LEN + 1 ];      /* Buffer for keyword string */
-   int ico;                      /* Loop counter for AstroCoords */
-   int ikey;                     /* Index of KeyMap */
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(channel);
-
-/* Initialise. */
-   new = NULL;
-
-/* 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 Stc. In this case the
-   Stc belongs to this class, so supply appropriate values to be
-   passed to the parent class loader (and its parent, etc.). */
-   if ( !vtab ) {
-      size = sizeof( AstStc );
-      vtab = &class_vtab;
-      name = "Stc";
-
-/* If required, initialise the virtual function table for this class. */
-      if ( !class_init ) {
-         astInitStcVtab( 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 Stc. */
-   new = astLoadRegion( mem, size, (AstRegionVtab *) 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, "Stc" );
-
-/* 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. */
-
-/* Encapsulated Region. */
-/* -------------------- */
-      new->region = astReadObject( channel, "region", NULL );
-
-/* Get a pointer to the base Frame in the FrameSet encapsulated by the
-   parent Region structure. */
-      f1 = astGetFrame( ((AstRegion *) new)->frameset, AST__BASE );
-
-/* If the encapsulated Region has a dummy FrameSet rather than the correct
-   FrameSet, the correct FrameSet will have copies of the base Frame of the
-   new Stc as both its current and base Frames, connected by a UnitMap (this
-   is equivalent to a FrameSet containing a single Frame). However if the new
-   Stc being loaded has itself got a dummy FrameSet, then we do not do this
-   since we do not yet know what the correct FrameSet is. In this case we
-   wait until the parent Region invokes the astSetRegFS method on the new
-   Stc. */
-      if( !astRegDummyFS( new ) ) {
-         creg = new->region;
-         if( astRegDummyFS( creg ) ) astSetRegFS( creg, f1 );
-      }
-
-/* AstroCoords info */
-/* ---------------- */
-/* The number of AstroCoords described in the new Stc. */
-      new->ncoord = astReadInt( channel, "ncoord", 0 );
-      if( new->ncoord < 0 ) new->ncoord = 0;
-
-/* Read back each KeyMap describing these AstroCoords. */
-      new->coord = astMalloc( sizeof( AstKeyMap *) * (size_t) new->ncoord );
-      for( ico = 1; ico <= new->ncoord; ico++ ) {
-         (void) sprintf( key, "coord%d", ico );
-         new->coord[ ico - 1 ] = astReadObject( channel, key, NULL );
-
-/* Ensure the Regions within the KeyMap do not have dummy FrameSets. */
-         if( new->coord[ ico - 1 ] && !astRegDummyFS( new ) ) {
-            for( ikey = 0; ikey < NREG; ikey++ ) {
-               if( astMapGet0A( new->coord[ ico - 1 ], regkey[ ikey ], &obj ) ){
-                  creg = (AstRegion *) obj;
-                  if( astRegDummyFS( creg ) ) {
-                     astSetRegFS( creg, f1 );
-                     astMapPut0A( new->coord[ ico - 1 ], regkey[ ikey ], creg,
-                                  regcom[ ikey ] );
-                  }
-                  creg = astAnnul( creg );
-               }
-            }
-         }
-      }
-
-/* Free resources */
-      f1 = astAnnul( f1 );
-
-/* If an error occurred, clean up by deleting the new Stc. */
-      if ( !astOK ) new = astDelete( new );
-   }
-
-/* Return the new Stc 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. */
-
-const char *astGetRegionClass_( AstStc *this, int *status ){
-   if ( !astOK ) return NULL;
-   return (**astMEMBER(this,Stc,GetRegionClass))( this, status );
-}
-
-AstRegion *astGetStcRegion_( AstStc *this, int *status ){
-   if ( !astOK ) return NULL;
-   return (**astMEMBER(this,Stc,GetStcRegion))( this, status );
-}
-
-AstKeyMap *astGetStcCoord_( AstStc *this, int icoord, int *status ){
-   if ( !astOK ) return NULL;
-   return (**astMEMBER(this,Stc,GetStcCoord))( this, icoord, status );
-}
-
-int astGetStcNCoord_( AstStc *this, int *status ){
-   if ( !astOK ) return 0;
-   return (**astMEMBER(this,Stc,GetStcNCoord))( this, status );
-}
-
-
-
-
-
-
-
-
-
-
-
-
-