upgrade AST

1 files changed, 0 insertions, 2942 deletions

diff --git a/ast/intramap.c b/ast/intramap.c
deleted file mode 100644
index 67eebb2..0000000
--- a/ast/intramap.c
+++ /dev/null
@@ -1,2942 +0,0 @@
-/*
-*class++
-*  Name:
-*     IntraMap
-
-*  Purpose:
-c     Map points using a private transformation function.
-f     Map points using a private transformation routine.
-
-*  Constructor Function:
-c     astIntraMap (also see astIntraReg)
-f     AST_INTRAMAP (also see AST_INTRAREG)
-
-*  Description:
-c     The IntraMap class provides a specialised form of Mapping which
-c     encapsulates a privately-defined coordinate transformation
-c     other AST Mapping. This allows you to create Mappings that
-c     perform any conceivable coordinate transformation.
-f     The IntraMap class provides a specialised form of Mapping which
-f     encapsulates a privately-defined coordinate transformation
-f     routine (e.g. written in Fortran) so that it may be used like
-f     any other AST Mapping. This allows you to create Mappings that
-f     perform any conceivable coordinate transformation.
-*
-*     However, an IntraMap is intended for use within a single program
-*     or a private suite of software, where all programs have access
-*     to the same coordinate transformation functions (i.e. can be
-*     linked against them). IntraMaps should not normally be stored in
-*     datasets which may be exported for processing by other software,
-*     since that software will not have the necessary transformation
-*     functions available, resulting in an error.
-*
-c     You must register any coordinate transformation functions to be
-c     used using astIntraReg before creating an IntraMap.
-f     You must register any coordinate transformation functions to be
-f     used using AST_INTRAREG before creating an IntraMap.
-
-*  Inheritance:
-*     The IntraMap class inherits from the Mapping class.
-
-*  Attributes:
-*     In addition to those attributes common to all Mappings, every
-*     IntraMap also has the following attributes:
-*
-*     - IntraFlag: IntraMap identification string
-
-*  Functions:
-c     The IntraMap class does not define any new functions beyond those
-f     The IntraMap class does not define any new routines beyond those
-*     which are applicable to all Mappings.
-
-*  Copyright:
-*     Copyright (C) 1997-2006 Council for the Central Laboratory of the
-*     Research Councils
-
-*  Licence:
-*     This program is free software: you can redistribute it and/or
-*     modify it under the terms of the GNU Lesser General Public
-*     License as published by the Free Software Foundation, either
-*     version 3 of the License, or (at your option) any later
-*     version.
-*     
-*     This program is distributed in the hope that it will be useful,
-*     but WITHOUT ANY WARRANTY; without even the implied warranty of
-*     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-*     GNU Lesser General Public License for more details.
-*     
-*     You should have received a copy of the GNU Lesser General
-*     License along with this program.  If not, see
-*     <http://www.gnu.org/licenses/>.
-
-*  Authors:
-*     RFWS: R.F. Warren-Smith (Starlink)
-
-*  History:
-*     16-MAR-1998 (RFWS):
-*        Original version.
-*     15-SEP-1999 (RFWS):
-*        Added a "this" pointer to the external transformation function
-*        used by an IntraMap.
-*     20-JUN-2001 (DSB):
-*        Add an "astClone" call to prevent the pointer for "this" being
-*        annulled at the end of the Transform method.
-*     8-JAN-2003 (DSB):
-*        Changed private InitVtab method to protected astInitIntraMapVtab
-*        method.
-*     7-DEC-2005 (DSB):
-*        Free memory allocated by calls to astReadString.
-*     14-FEB-2006 (DSB):
-*        Override astGetObjSize.
-*     1-MAR-2006 (DSB):
-*        Replace astSetPermMap within DEBUG blocks by astBeginPM/astEndPM.
-*     10-MAY-2006 (DSB):
-*        Override astEqual.
-*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 IntraMap
-
-/* Include files. */
-/* ============== */
-/* Interface definitions. */
-/* ---------------------- */
-
-#include "globals.h"             /* Thread-safe global data access */
-#include "error.h"               /* Error reporting facilities */
-#include "memory.h"              /* Memory allocation facilities */
-#include "globals.h"             /* Thread-safe global data access */
-#include "object.h"              /* Base Object class */
-#include "pointset.h"            /* Sets of points/coordinates */
-#include "mapping.h"             /* Coordinate mappings (parent class) */
-#include "channel.h"             /* I/O channels */
-#include "unitmap.h"             /* Unit (identity) Mappings */
-#include "intramap.h"            /* Interface definition for this class */
-
-/* Error code definitions. */
-/* ----------------------- */
-#include "ast_err.h"             /* AST error codes */
-
-/* C header files. */
-/* --------------- */
-#include <ctype.h>
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-
-/* Module Variables. */
-/* ================= */
-
-/* Pointer to array of transformation function data. */
-static AstIntraMapTranData *tran_data = NULL;
-
-/* Number of transformation functions registered. */
-static int tran_nfun = 0;
-
-/* 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 used or extended by this
-   class. */
-static int (* parent_getobjsize)( AstObject *, int * );
-static AstPointSet *(* parent_transform)( AstMapping *, AstPointSet *, int, AstPointSet *, int * );
-static const char *(* parent_getattrib)( AstObject *, const char *, int * );
-static int (* parent_getnin)( AstMapping *, int * );
-static int (* parent_getnout)( AstMapping *, 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 * );
-
-/* Define macros for accessing each item of thread specific global data. */
-#ifdef THREAD_SAFE
-
-/* Define how to initialise thread-specific globals. */
-#define GLOBAL_inits \
-   globals->Class_Init = 0;
-
-/* Create the function that initialises global data for this module. */
-astMAKE_INITGLOBALS(IntraMap)
-
-/* Define macros for accessing each item of thread specific global data. */
-#define class_init astGLOBAL(IntraMap,Class_Init)
-#define class_vtab astGLOBAL(IntraMap,Class_Vtab)
-
-
-/* A mutex used to serialise invocations of the IntraReg function (the
-   only function allowed to modify the contents of the static tran_data
-   array). */
-static pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
-#define LOCK_MUTEX1 pthread_mutex_lock( &mutex1 );
-#define UNLOCK_MUTEX1 pthread_mutex_unlock( &mutex1 );
-
-/* A mutex used to serialise invocations of extrnal transformation
-   functions (which may not be thread-safe). */
-static pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;
-#define LOCK_MUTEX2 pthread_mutex_lock( &mutex2 );
-#define UNLOCK_MUTEX2 pthread_mutex_unlock( &mutex2 );
-
-/* If thread safety is not needed, declare and initialise globals at static
-   variables. */
-#else
-
-
-/* Define the class virtual function table and its initialisation flag
-   as static variables. */
-static AstIntraMapVtab class_vtab;   /* Virtual function table */
-static int class_init = 0;       /* Virtual function table initialised? */
-
-#define LOCK_MUTEX1
-#define UNLOCK_MUTEX1
-
-#define LOCK_MUTEX2
-#define UNLOCK_MUTEX2
-
-#endif
-
-/* External Interface Function Prototypes. */
-/* ======================================= */
-/* The following functions have public prototypes only (i.e. no
-   protected prototypes), so we must provide local prototypes for use
-   within this module. */
-AstIntraMap *astIntraMapId_( const char *, int, int, const char *, ... );
-void astIntraRegFor_( const char *, int, int, void (* tran)( AstMapping *, int, int, const double *[], int, int, double *[] ), void (* tran_wrap)( void (*)( AstMapping *, int, int, const double *[], int, int, double *[] ), AstMapping *, int, int, const double *[], int, int, double *[], int * ), unsigned int, const char *, const char *, const char *, int * );
-
-/* Prototypes for Private Member Functions. */
-/* ======================================== */
-static AstPointSet *Transform( AstMapping *, AstPointSet *, int, AstPointSet *, int * );
-static char *CleanName( const char *, const char *, int * );
-static int GetObjSize( AstObject *, int * );
-static const char *GetAttrib( AstObject *, const char *, int * );
-static const char *GetIntraFlag( AstIntraMap *, int * );
-static int MapMerge( AstMapping *, int, int, int *, AstMapping ***, int **, int * );
-static int TestAttrib( AstObject *, const char *, int * );
-static int TestIntraFlag( AstIntraMap *, int * );
-static void ClearAttrib( AstObject *, const char *, int * );
-static void ClearIntraFlag( AstIntraMap *, int * );
-static void Copy( const AstObject *, AstObject *, int * );
-static void Delete( AstObject *, int * );
-static void Dump( AstObject *, AstChannel *, int * );
-static int Equal( AstObject *, AstObject *, int * );
-static void IntraReg( const char *, int, int, void (*)( AstMapping *, int, int, const double *[], int, int, double *[] ), void (*)( void (*)( AstMapping *, int, int, const double *[], int, int, double *[] ), AstMapping *, int, int, const double *[], int, int, double *[], int * ), unsigned int, const char *, const char *, const char *, int * );
-static void SetAttrib( AstObject *, const char *, int * );
-static void SetIntraFlag( AstIntraMap *, const char *, int * );
-static void TranWrap( void (*)( AstMapping *, int, int, const double *[], int, int, double *[] ), AstMapping *, int, int, const double *[], int, int, double *[], int * );
-
-/* Member functions. */
-/* ================= */
-static char *CleanName( const char *name, const char *caller, int *status ) {
-/*
-*  Name:
-*     CleanName
-
-*  Purpose:
-*     Clean (and validate) a transformation function name.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     char *CleanName( const char *name, const char *caller, int *status )
-
-*  Class Membership:
-*     IntraMap member function.
-
-*  Description:
-*     This function cleans a transformation function name by removing
-*     all white space. It returns a copy of the cleaned name held in
-*     dynamically allocated memory. If the name is entirely blank, an
-*     error is reported.
-
-*  Parameters:
-*     name
-*        Pointer to a null-terminated string containing the name to be
-*        cleaned.
-*     caller
-*        Pointer to a null-terminated string containing the name of
-*        the calling function. This is only used to construct error
-*        messages.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     Pointer to a dynamically-allocated null-terminated string
-*     containing the cleaned name. A NULL pointer is returned if the
-*     name was entirely blank.
-
-*  Notes:
-*     - The memory holding the returned string should be deallocated
-*     (using astFree) when no longer required.
-*     - 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: */
-   char *result;                 /* Pointer to result string */
-   int i;                        /* Loop counter for input characters */
-   int len;                      /* Length of name */
-
-/* Initialise. */
-   result = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Determine the number of non-blank characters in the name supplied. */
-   len = 0;
-   for ( i = 0; name[ i ]; i++ ) if ( !isspace( (int) name[ i ] ) ) len++;
-
-/* If the name is entirely blank, then report an error. */
-   if ( !len ) {
-      astError( AST__ITFNI, "%s: Invalid blank transformation function name "
-                            "given.", status, caller );
-
-/* Otherwise, allocate memory to hold the cleaned name. */
-   } else {
-      result = astMalloc( (size_t) ( len + 1 ) );
-
-/* If OK, make a copy of the name with white space removed. */
-      if ( astOK ) {
-         len = 0;
-         for ( i = 0; name[ i ]; i++ ) {
-            if ( !isspace( (int) name[ i ] ) ) result[ len++ ] = name[ i ];
-         }
-
-/* Terminate the result string. */
-         result[ len ] = '\0';
-      }
-   }
-
-/* Return the result pointer. */
-   return result;
-}
-
-static void ClearAttrib( AstObject *this_object, const char *attrib, int *status ) {
-/*
-*  Name:
-*     ClearAttrib
-
-*  Purpose:
-*     Clear an attribute value for an IntraMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     void ClearAttrib( AstObject *this, const char *attrib, int *status )
-
-*  Class Membership:
-*     IntraMap member function (over-rides the astClearAttrib protected
-*     method inherited from the Mapping class).
-
-*  Description:
-*     This function clears the value of a specified attribute for an
-*     IntraMap, so that the default value will subsequently be used.
-
-*  Parameters:
-*     this
-*        Pointer to the IntraMap.
-*     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: */
-   AstIntraMap *this;            /* Pointer to the IntraMap structure */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain a pointer to the IntraMap structure. */
-   this = (AstIntraMap *) this_object;
-
-/* Check the attribute name and clear the appropriate attribute. */
-
-/* IntraFlag. */
-/* ---------- */
-   if ( !strcmp( attrib, "intraflag" ) ) {
-      astClearIntraFlag( this );
-
-/* Not recognised. */
-/* --------------- */
-/* If the attribute is 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 IntraMaps are equivalent.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     int Equal( AstObject *this, AstObject *that, int *status )
-
-*  Class Membership:
-*     IntraMap member function (over-rides the astEqual protected
-*     method inherited from the astMapping class).
-
-*  Description:
-*     This function returns a boolean result (0 or 1) to indicate whether
-*     two IntraMaps are equivalent.
-
-*  Parameters:
-*     this
-*        Pointer to the first Object (a IntraMap).
-*     that
-*        Pointer to the second Object.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     One if the IntraMaps are equivalent, zero otherwise.
-
-*  Notes:
-*     - A value of zero will be returned if this function is invoked
-*     with the global status set, or if it should fail for any reason.
-*/
-
-/* Local Variables: */
-   AstIntraMap *that;
-   AstIntraMap *this;
-   int nin;
-   int nout;
-   int result;
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain pointers to the two IntraMap structures. */
-   this = (AstIntraMap *) this_object;
-   that = (AstIntraMap *) that_object;
-
-/* Check the second object is a IntraMap. We know the first is a
-   IntraMap since we have arrived at this implementation of the virtual
-   function. */
-   if( astIsAIntraMap( that ) ) {
-
-/* Get the number of inputs and outputs and check they are the same for both. */
-      nin = astGetNin( this );
-      nout = astGetNout( this );
-      if( astGetNin( that ) == nin && astGetNout( that ) == nout ) {
-
-/* If the Invert flags for the two IntraMaps differ, it may still be possible
-   for them to be equivalent. First compare the IntraMaps if their Invert
-   flags are the same. In this case all the attributes of the two IntraMaps
-   must be identical. */
-         if( astGetInvert( this ) == astGetInvert( that ) ) {
-
-            if( this->ifun == that->ifun &&
-                this->intraflag && that->intraflag &&
-                !strcmp( this->intraflag, that->intraflag ) ) {
-               result = 1;
-            }
-
-/* If the Invert flags for the two IntraMaps differ, the attributes of the two
-   IntraMaps must be inversely related to each other. */
-         } else {
-
-/* In the specific case of a IntraMap, Invert flags must be equal. */
-            result = 0;
-
-         }
-      }
-   }
-
-/* If an error occurred, clear the result value. */
-   if ( !astOK ) result = 0;
-
-/* Return the result, */
-   return result;
-}
-
-static int GetObjSize( AstObject *this_object, int *status ) {
-/*
-*  Name:
-*     GetObjSize
-
-*  Purpose:
-*     Return the in-memory size of an Object.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     int GetObjSize( AstObject *this, int *status )
-
-*  Class Membership:
-*     IntraMap member function (over-rides the astGetObjSize protected
-*     method inherited from the parent class).
-
-*  Description:
-*     This function returns the in-memory size of the supplied IntraMap,
-*     in bytes.
-
-*  Parameters:
-*     this
-*        Pointer to the IntraMap.
-*     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: */
-   AstIntraMap *this;         /* Pointer to IntraMap structure */
-   int result;                /* Result value to return */
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointers to the IntraMap structure. */
-   this = (AstIntraMap *) 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 += astTSizeOf( this->intraflag );
-
-/* 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 an IntraMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     const char *GetAttrib( AstObject *this, const char *attrib, int *status )
-
-*  Class Membership:
-*     IntraMap member function (over-rides the protected astGetAttrib
-*     method inherited from the Mapping class).
-
-*  Description:
-*     This function returns a pointer to the value of a specified
-*     attribute for a IntraMap, formatted as a character string.
-
-*  Parameters:
-*     this
-*        Pointer to the IntraMap.
-*     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 IntraMap, 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 IntraMap. 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: */
-   AstIntraMap *this;            /* Pointer to the IntraMap structure */
-   const char *result;           /* Pointer value to return */
-
-/* Initialise. */
-   result = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointer to the IntraMap structure. */
-   this = (AstIntraMap *) this_object;
-
-/* 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. */
-
-/* IntraFlag. */
-/* ---------- */
-   if ( !strcmp( attrib, "intraflag" ) ) {
-      result = astGetIntraFlag( this );
-
-/* 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;
-}
-
-void astInitIntraMapVtab_(  AstIntraMapVtab *vtab, const char *name, int *status ) {
-/*
-*+
-*  Name:
-*     astInitIntraMapVtab
-
-*  Purpose:
-*     Initialise a virtual function table for an IntraMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     void astInitIntraMapVtab( AstIntraMapVtab *vtab, const char *name )
-
-*  Class Membership:
-*     IntraMap vtab initialiser.
-
-*  Description:
-*     This function initialises the component of a virtual function
-*     table which is used by the IntraMap class.
-
-*  Parameters:
-*     vtab
-*        Pointer to the virtual function table. The components used by
-*        all ancestral classes will be initialised if they have not already
-*        been initialised.
-*     name
-*        Pointer to a constant null-terminated character string which contains
-*        the name of the class to which the virtual function table belongs (it
-*        is this pointer value that will subsequently be returned by the Object
-*        astClass function).
-*-
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstObjectVtab *object;        /* Pointer to Object component of Vtab */
-   AstMappingVtab *mapping;      /* Pointer to Mapping component of Vtab */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Initialize the component of the virtual function table used by the
-   parent class. */
-   astInitMappingVtab( (AstMappingVtab *) vtab, name );
-
-/* Store a unique "magic" value in the virtual function table. This
-   will be used (by astIsAIntraMap) to determine if an object belongs
-   to this class.  We can conveniently use the address of the (static)
-   class_check variable to generate this unique value. */
-   vtab->id.check = &class_check;
-   vtab->id.parent = &(((AstMappingVtab *) vtab)->id);
-
-/* Initialise member function pointers. */
-/* ------------------------------------ */
-/* Store pointers to the member functions (implemented here) that provide
-   virtual methods for this class. */
-   vtab->ClearIntraFlag = ClearIntraFlag;
-   vtab->GetIntraFlag = GetIntraFlag;
-   vtab->SetIntraFlag = SetIntraFlag;
-   vtab->TestIntraFlag = TestIntraFlag;
-
-/* Save the inherited pointers to methods that will be extended, and
-   replace them with pointers to the new member functions. */
-   object = (AstObjectVtab *) vtab;
-   mapping = (AstMappingVtab *) vtab;
-   parent_getobjsize = object->GetObjSize;
-   object->GetObjSize = GetObjSize;
-
-   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;
-
-/* Store replacement pointers for methods which will be over-ridden by
-   new member functions implemented here. */
-   object->Equal = Equal;
-   mapping->MapMerge = MapMerge;
-
-/* Store pointers to inherited methods that will be invoked explicitly
-   by this class. */
-   parent_getnin = mapping->GetNin;
-   parent_getnout = mapping->GetNout;
-
-/* Declare the copy constructor, destructor and class dump
-   function. */
-   astSetCopy( vtab, Copy );
-   astSetDelete( vtab, Delete );
-   astSetDump( vtab, Dump, "IntraMap",
-               "Map points using a private transformation function" );
-
-/* 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 void IntraReg( const char *name, int nin, int nout,
-                      void (* tran)( AstMapping *, int, int, const double *[],
-                                     int, int, double *[] ),
-                      void (* tran_wrap)( void (*)( AstMapping *, int, int,
-                                                    const double *[], int, int,
-                                                    double *[] ),
-                                          AstMapping *, int, int,
-                                          const double *[], int, int,
-                                          double *[], int * ),
-                      unsigned int flags,
-                      const char *purpose, const char *author,
-                      const char *contact, int *status ) {
-/*
-*  Name:
-*     IntraReg
-
-*  Purpose:
-*     Register a transformation function for use by an IntraMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     void IntraReg( const char *name, int nin, int nout,
-*                    void (* tran)( AstMapping *, int, int, const double *[],
-*                                   int, int, double *[] ),
-*                    void (* tran_wrap)( void (*)( AstMapping *, int, int,
-*                                                  const double *[], int, int,
-*                                                  double *[] ),
-*                                        AstMapping *, int, int,
-*                                        const double *[], int, int,
-*                                        double *[], int * ),
-*                    unsigned int flags,
-*                    const char *purpose, const char *author,
-*                    const char *contact, int *status )
-
-*  Class Membership:
-*     IntraMap member function.
-
-*  Description:
-*     This function registers a transformation function which will
-*     later be used by an IntraMap and associates it with a name. It
-*     also stores related information which will be required by the
-*     IntraMap.
-
-*  Parameters:
-*     name
-*        Pointer to a null-terminated string containing the name to be
-*        used to identify the transformation function. This string is
-*        case sensitive. All white space is removed before use.
-*     nin
-*        The number of input coordinates per point (or AST__ANY if any
-*        number are allowed).
-*     nout
-*        The number of output coordinates per point (or AST__ANY if
-*        any number are allowed).
-*     tran
-*        Pointer to the transformation function to be registered.
-*        This may have any form of interface, which need not be known
-*        to the implementation of the IntraMap class. Instead, the
-*        method of invoking the transformation function should be
-*        encapsulated in the "tran_wrap" function (below).
-*     tran_wrap
-*        Pointer to a wrapper function appropriate to the transformation
-*        function (above). This wrapper function should have the same
-*        interface as astTranP (from the Mapping class), except that it takes
-*        a pointer to a function like "tran" as an additional first argument.
-*        The purpose of this wrapper is to invoke the transformation function
-*        via the pointer supplied, to pass it the necessary information
-*        derived from the remainder of its arguments, and then to return the
-*        results.
-*     flags
-*        This argument may be used to supply a set of flags which
-*        control the behaviour of any IntraMap which uses the
-*        registered transformation function. See the public interface
-*        for astIntraReg for details.
-*     purpose
-*        Pointer to a null-terminated string containing a short (one
-*        line) textual comment to describe the purpose of the
-*        transformation function.
-*     author
-*        Pointer to a null-terminated string containing the name of
-*        the author of the transformation function.
-*     contact
-*        Pointer to a null-terminated string containing contact
-*        details for the author of the function (e.g. an e-mail or WWW
-*        address).
-*     status
-*        Pointer to the inherited status variable.
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   char *clname;                 /* Pointer to cleaned name string */
-   int found;                    /* Transformation function found? */
-   int ifun;                     /* Loop counter for function information */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* This function modifies the global static tran_data array, so we use a
-   mutex to ensure that only one thread can run this function at any one
-   time. */
-   LOCK_MUTEX1;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Indicate that subsequent memory allocations may never be freed (other
-   than by any AST exit handler). */
-   astBeginPM;
-
-/* Clean (and validate) the name supplied. */
-   clname = CleanName( name, "astIntraReg", status );
-
-/* If OK, also validate the numbers of input and output
-   coordinates. Report an error if necessary. */
-   if ( astOK ) {
-      if ( ( nin < 0 ) && ( nin != AST__ANY ) ) {
-         astError( AST__BADNI, "astIntraReg(%s): Bad number of input "
-                               "coordinates (%d).", status, clname, nin );
-         astError( AST__BADNI, "This number should be zero or more (or "
-                               "AST__ANY)." , status);
-
-      } else if ( ( nout < 0 ) && ( nout != AST__ANY ) ) {
-         astError( AST__BADNO, "astIntraReg(%s): Bad number of output "
-                               "coordinates (%d).", status, clname, nout );
-         astError( AST__BADNO, "This number should be zero or more (or "
-                               "AST__ANY)." , status);
-      }
-   }
-
-/* Search the array of transformation function data to see if a
-   function with the same name has already been registered. */
-   if ( astOK ) {
-      found = 0;
-      for ( ifun = 0; ifun < tran_nfun; ifun++ ) {
-         if ( ( found = !strcmp( clname, tran_data[ ifun ].name ) ) ) break;
-      }
-
-/* If so, then check that the information supplied this time is
-   identical to that supplied before. If any discrepancy is found,
-   report an error. */
-      if ( found ) {
-         if ( ( nin != tran_data[ ifun ].nin ) ||
-              ( nout != tran_data[ ifun ].nout ) ||
-              ( tran != tran_data[ ifun ].tran ) ||
-              ( tran_wrap != tran_data[ ifun ].tran_wrap ) ||
-              ( flags != tran_data[ ifun ].flags ) ||
-              strcmp( purpose, tran_data[ ifun ].purpose ) ||
-              strcmp( author, tran_data[ ifun ].author ) ||
-              strcmp( contact, tran_data[ ifun ].contact ) ) {
-            astError( AST__MRITF, "astIntraReg: Invalid attempt to register "
-                                  "the transformation function name \"%s\" "
-                                  "multiple times.", status, clname );
-         }
-
-/* If this is a new function, extend the array of transformation
-   function data to accommodate it. */
-      } else {
-
-         tran_data = astGrow( tran_data, tran_nfun + 1, sizeof( AstIntraMapTranData ) );
-
-/* Store the information supplied. */
-         if ( astOK ) {
-            tran_data[ tran_nfun ].name = clname;
-            tran_data[ tran_nfun ].nin = nin;
-            tran_data[ tran_nfun ].nout = nout;
-            tran_data[ tran_nfun ].tran = tran;
-            tran_data[ tran_nfun ].tran_wrap = tran_wrap;
-            tran_data[ tran_nfun ].flags = flags;
-            tran_data[ tran_nfun ].purpose =
-               astStore( NULL, purpose, strlen( purpose ) + (size_t) 1 );
-            tran_data[ tran_nfun ].author =
-               astStore( NULL, author, strlen( author ) + (size_t) 1 );
-            tran_data[ tran_nfun ].contact =
-               astStore( NULL, contact, strlen( contact ) + (size_t) 1 );
-
-/* If successful, increment the count of transformation functions
-   registered. */
-            if ( astOK ) {
-               tran_nfun++;
-
-/* If an error occurred, free any memory that was allocated. */
-            } else {
-               tran_data[ tran_nfun ].name = NULL;
-               tran_data[ tran_nfun ].purpose =
-                  astFree( tran_data[ tran_nfun ].purpose );
-               tran_data[ tran_nfun ].author =
-                  astFree( tran_data[ tran_nfun ].author );
-               tran_data[ tran_nfun ].contact =
-                  astFree( tran_data[ tran_nfun ].contact );
-            }
-         }
-      }
-   }
-
-/* If an error occurred, free the memory holding the cleaned function
-   name. */
-   if ( !astOK ) clname = astFree( clname );
-
-/* Mark the end of the section in which memory allocations may never be
-   freed (other than by any AST exit handler). */
-   astEndPM;
-
-/* Unlock the mutex that ensures that only one thread can run this function
-   at any one time. */
-   UNLOCK_MUTEX1;
-
-}
-
-void astIntraReg_( const char *name, int nin, int nout,
-                   void (* tran)( AstMapping *, int, int, const double *[],
-                                  int, int, double *[] ),
-                   unsigned int flags, const char *purpose, const char *author,
-                   const char *contact, int *status ) {
-/*
-*++
-*  Name:
-c     astIntraReg
-f     AST_INTRAREG
-
-*  Purpose:
-c     Register a transformation function for use by an IntraMap.
-f     Register a transformation routine for use by an IntraMap.
-
-*  Type:
-*     Public function.
-
-*  Synopsis:
-c     #include "intramap.h"
-c     astIntraReg( const char *name, int nin, int nout,
-c                  void (* tran)( AstMapping *, int, int, const double *[],
-c                                 int, int, double *[] ),
-c                  unsigned int flags, const char *purpose, const char *author,
-c                  const char *contact )
-f     CALL AST_INTRAREG( NAME, NIN, NOUT, TRAN, FLAGS, PURPOSE, AUTHOR,
-f                        CONTACT, STATUS )
-
-*  Class Membership:
-*     IntraMap member function.
-
-*  Description:
-c     This function registers a privately-defined coordinate
-c     transformation function written in C so that it may be used to
-c     create an IntraMap. An IntraMap is a specialised form of Mapping
-c     which encapsulates the C function so that it may be used like
-c     any other AST Mapping. This allows you to create Mappings that
-c     perform any conceivable coordinate transformation.
-f     This function registers a privately-defined coordinate
-f     transformation routine written in Fortran so that it may be used
-f     to create an IntraMap. An IntraMap is a specialised form of
-f     Mapping which encapsulates the Fortran routine so that it may be
-f     used like any other AST Mapping. This allows you to create
-f     Mappings that perform any conceivable coordinate transformation.
-*
-c     Registration of relevant transformation functions is required
-c     before using the astIntraMap constructor function to create an
-c     IntraMap or reading an external representation of an IntraMap
-c     from a Channel.
-f     Registration of relevant transformation routines is required
-f     before using the AST_INTRAMAP constructor function to create an
-f     IntraMap or reading an external representation of an IntraMap
-f     from a Channel.
-
-*  Parameters:
-c     name
-f     NAME = CHARACTER * ( * ) (Given)
-c        Pointer to a null-terminated string containing a unique name
-c        to be associated with the transformation function in order to
-c        identify it. This name is case sensitive. All white space
-c        will be removed before use.
-f        A character string containing a unique name to be associated
-f        with the transformation routine in order to identify it. This
-f        name is case sensitive. All white space will be removed
-f        before use.
-c     nin
-f     NIN = INTEGER (Given)
-c        The number of input coordinates accepted by the
-c        transformation function (i.e. the number of dimensions of the
-c        space in which the input points reside). A value of AST__ANY
-c        may be given if the function is able to accommodate a
-c        variable number of input coordinates.
-f        The number of input coordinates accepted by the
-f        transformation routine (i.e. the number of dimensions of the
-f        space in which the input points reside). A value of AST__ANY
-f        may be given if the routine is able to accommodate a variable
-f        number of input coordinates.
-c     nout
-f     NOUT = INTEGER (Given)
-c        The number of output coordinates produced by the
-c        transformation function (i.e. the number of dimensions of the
-c        space in which the output points reside). A value of AST__ANY
-c        may be given if the function is able to produce a variable
-c        number of output coordinates.
-f        The number of output coordinates produced by the
-f        transformation routine (i.e. the number of dimensions of the
-f        space in which the output points reside). A value of AST__ANY
-f        may be given if the routine is able to produce a variable
-f        number of output coordinates.
-c     tran
-f     TRAN = SUBROUTINE (Given)
-c        Pointer to the transformation function to be registered.
-c        This function should perform whatever coordinate
-c        transformations are required and should have an interface
-c        like astTranP (q.v.).
-f        The transformation routine to be registered.  This routine
-f        should perform whatever coordinate transformations are
-f        required and should have an interface like AST_TRANN (q.v.).
-f
-f        This transformation routine must also appear in an EXTERNAL
-f        statement in the routine which calls AST_INTRAREG.
-c     flags
-f     FLAGS = INTEGER (Given)
-c        This value may be used to supply a set of flags which
-c        describe the transformation function and which may affect the
-c        behaviour of any IntraMap which uses it.  Often, a value of
-c        zero will be given here, but you may also supply the bitwise
-c        OR of a set of flags as described in the "Transformation
-c        Flags" section (below).
-f        This value may be used to supply a set of flags which
-f        describe the transformation routine and which may affect the
-f        behaviour of any IntraMap which uses it.  Often, a value of
-f        zero will be given here, but you may also supply the sum of a
-f        set of flags as described in the "Transformation Flags"
-f        section (below).
-c     purpose
-f     PURPOSE = CHARACTER * ( * ) (Given)
-c        Pointer to a null-terminated string containing a short (one
-c        line) textual comment to describe the purpose of the
-c        transformation function.
-f        A character string containing a short (one line) textual
-f        comment to describe the purpose of the transformation
-f        routine.
-c     author
-f     AUTHOR = CHARACTER * ( * ) (Given)
-c        Pointer to a null-terminated string containing the name of
-c        the author of the transformation function.
-f        A character string containing the name of the author of the
-f        transformation routine.
-c     contact
-f     CONTACT = CHARACTER * ( * ) (Given)
-c        Pointer to a null-terminated string containing contact
-c        details for the author of the transformation function
-c        (e.g. an e-mail or WWW address). If any IntraMap which uses
-c        this transformation function is exported as part of a dataset
-c        to an external user who does not have access to the function,
-c        then these contact details should allow them to obtain the
-c        necessary code.
-f        A character string containing contact details for the author
-f        of the transformation routine (e.g. an e-mail or WWW
-f        address). If any IntraMap which uses this transformation
-f        routine is exported as part of a dataset to an external user
-f        who does not have access to the routine, then these contact
-f        details should allow them to obtain the necessary code.
-f     STATUS = INTEGER (Given and Returned)
-f        The global status.
-
-*  Notes:
-c     - Beware that an external representation of an IntraMap (created
-c     by writing it to a Channel) will not include the coordinate
-c     transformation function which it uses, so will only refer to the
-c     function by its name (as assigned using astIntraReg).
-c     Consequently, the external representation cannot be utilised by
-c     another program unless that program has also registered the same
-c     transformation function with the same name using an identical
-c     invocation of astIntraReg. If no such registration has been
-c     performed, then attempting to read the external representation
-c     will result in an error.
-f     - Beware that an external representation of an IntraMap (created
-f     by writing it to a Channel) will not include the coordinate
-f     transformation routine which it uses, so will only refer to the
-f     routine by its name (as assigned using AST_INTRAREG).
-f     Consequently, the external representation cannot be utilised by
-f     another program unless that program has also registered the same
-f     transformation routine with the same name using an identical
-f     invocation of AST_INTRAREG. If no such registration has been
-f     performed, then attempting to read the external representation
-f     will result in an error.
-c     - You may use astIntraReg to register a transformation function
-c     with the same name more than once, but only if the arguments
-c     supplied are identical on each occasion (i.e there is no way of
-c     changing things once a function has been successfully registered
-c     under a given name, and attempting to do so will result in an
-c     error). This feature simply allows registration to be performed
-c     independently, but consistently, at several places within your
-c     program, without having to check whether it has already been
-c     done.
-f     - You may use AST_INTRAREG to register a transformation routine
-f     with the same name more than once, but only if the arguments
-f     supplied are identical on each occasion (i.e there is no way of
-f     changing things once a routine has been successfully registered
-f     under a given name, and attempting to do so will result in an
-f     error). This feature simply allows registration to be performed
-f     independently, but consistently, at several places within your
-f     program, without having to check whether it has already been
-f     done.
-c     - If an error occurs in the transformation function, this may be
-c     indicated by setting the AST error status to an error value
-c     (using astSetStatus) before it returns.  This will immediately
-c     terminate the current AST operation.  The error value AST__ITFER
-c     is available for this purpose, but other values may also be used
-c     (e.g. if you wish to distinguish different types of error).
-f     - If an error occurs in the transformation routine, this may be
-f     indicated by setting its STATUS argument to an error value
-f     before it returns.  This will immediately terminate the current
-f     AST operation.  The error value AST__ITFER is available for this
-f     purpose, but other values may also be used (e.g. if you wish to
-f     distinguish different types of error). The AST__ITFER error
-f     value is defined in the AST_ERR include file.
-
-*  Transformation Flags:
-c     The following flags are defined in the ``ast.h'' header file and
-c     allow you to provide further information about the nature of the
-c     transformation function. Having selected the set of flags which
-c     apply, you should supply the bitwise OR of their values as the
-c     ``flags'' argument to astIntraReg.
-f     The following flags are defined in the AST_PAR include file and
-f     allow you to provide further information about the nature of the
-f     transformation routine. Having selected the set of flags which
-f     apply, you should supply the sum of their values as the FLAGS
-f     argument to AST_INTRAREG.
-
-c     - AST__NOFWD: If this flag is set, it indicates that the
-c     transformation function does not implement a forward coordinate
-c     transformation. In this case, any IntraMap which uses it will
-c     have a TranForward attribute value of zero and the
-c     transformation function itself will not be invoked with its
-c     ``forward'' argument set to a non-zero value.  By default, it is
-c     assumed that a forward transformation is provided.
-f     - AST__NOFWD: If this flag is set, it indicates that the
-f     transformation routine does not implement a forward coordinate
-f     transformation. In this case, any IntraMap which uses it will
-f     have a TranForward attribute value of zero and the
-f     transformation routine itself will not be called with its
-f     FORWARD argument set to .TRUE.. By default, it is assumed that a
-f     forward transformation is provided.
-c     - AST__NOINV: If this flag is set, it indicates that the
-c     transformation function does not implement an inverse coordinate
-c     transformation. In this case, any IntraMap which uses it will
-c     have a TranInverse attribute value of zero and the
-c     transformation function itself will not be invoked with its
-c     ``forward'' argument set to zero.  By default, it is assumed
-c     that an inverse transformation is provided.
-f     - AST__NOINV: If this flag is set, it indicates that the
-f     transformation routine does not implement an inverse coordinate
-f     transformation. In this case, any IntraMap which uses it will
-f     have a TranInverse attribute value of zero and the
-f     transformation routine itself will not be called with its
-f     FORWARD argument set to .FALSE.. By default, it is assumed that
-f     an inverse transformation is provided.
-c     - AST__SIMPFI: You may set this flag if applying the
-c     transformation function's forward coordinate transformation,
-c     followed immediately by the matching inverse transformation,
-c     should always restore the original set of coordinates. It
-c     indicates that AST may replace such a sequence of operations by
-c     an identity Mapping (a UnitMap) if it is encountered while
-c     simplifying a compound Mapping (e.g. using astSimplify).  It is
-c     not necessary that both transformations have actually been
-c     implemented.
-f     - AST__SIMPFI: You may set this flag if applying the
-f     transformation routine's forward coordinate transformation,
-f     followed immediately by the matching inverse transformation,
-f     should always restore the original set of coordinates. It
-f     indicates that AST may replace such a sequence of operations by
-f     an identity Mapping (a UnitMap) if it is encountered while
-f     simplifying a compound Mapping (e.g. using AST_SIMPLIFY).  It is
-f     not necessary that both transformations have actually been
-f     implemented.
-c     - AST__SIMPIF: You may set this flag if applying the
-c     transformation function's inverse coordinate transformation,
-c     followed immediately by the matching forward transformation,
-c     should always restore the original set of coordinates. It
-c     indicates that AST may replace such a sequence of operations by
-c     an identity Mapping (a UnitMap) if it is encountered while
-c     simplifying a compound Mapping (e.g. using astSimplify).  It is
-c     not necessary that both transformations have actually been
-c     implemented.
-f     - AST__SIMPIF: You may set this flag if applying the
-f     transformation routine's inverse coordinate transformation,
-f     followed immediately by the matching forward transformation,
-f     should always restore the original set of coordinates. It
-f     indicates that AST may replace such a sequence of operations by
-f     an identity Mapping (a UnitMap) if it is encountered while
-f     simplifying a compound Mapping (e.g. using AST_SIMPLIFY).  It is
-f     not necessary that both transformations have actually been
-f     implemented.
-*--
-*/
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Register the transformation function together with the appropriate
-   wrapper function for the C language. */
-   IntraReg( name, nin, nout, tran, TranWrap, flags, purpose, author,
-             contact, status );
-}
-
-void astIntraRegFor_( const char *name, int nin, int nout,
-                      void (* tran)( AstMapping *, int, int, const double *[],
-                                     int, int, double *[] ),
-                      void (* tran_wrap)( void (*)( AstMapping *, int, int,
-                                                    const double *[], int, int,
-                                                    double *[] ),
-                                          AstMapping *, int, int,
-                                          const double *[], int, int,
-                                          double *[], int * ),
-                      unsigned int flags, const char *purpose,
-                      const char *author, const char *contact, int *status ) {
-/*
-*+
-*  Name:
-*     astIntraRegFor
-
-*  Purpose:
-*     Register a foreign language transformation function for an IntraMap.
-
-*  Type:
-*     Public function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     void astIntraRegFor( const char *name, int nin, int nout,
-*                          void (* tran)( AstMapping *, int, int,
-*                                         const double *[], int, int,
-*                                         double *[] ),
-*                          void (* tran_wrap)( void (*)( AstMapping *, int,
-*                                                        int, const double *[],
-*                                                        int, int,
-*                                                        double *[] ),
-*                                              AstMapping *, int, int,
-*                                              const double *[], int, int,
-*                                              double *[], int * ),
-*                          unsigned int flags, const char *purpose,
-*                          const char *author, const char *contact )
-
-*  Class Membership:
-*     IntraMap member function.
-
-*  Description:
-*     This function registers a transformation function provided by a
-*     foreign language interface which will later be used by an
-*     IntraMap, and associates it with a name. It also stores related
-*     information which will be required by the IntraMap.
-
-*  Parameters:
-*     name
-*        Pointer to a null-terminated string containing the name to be
-*        used to identify the transformation function. This string is
-*        case sensitive. All white space is removed before use.
-*     nin
-*        The number of input coordinates per point (or AST__ANY if any
-*        number are allowed).
-*     nout
-*        The number of output coordinates per point (or AST__ANY if
-*        any number are allowed).
-*     tran
-*        Pointer to the foreign language transformation function to be
-*        registered. This may have any form of interface, which need
-*        not be known to the implementation of the IntraMap
-*        class. Instead, the method of invoking the transformation
-*        function should be encapsulated in the "tran_wrap" function
-*        (below).
-*     tran_wrap
-*        Pointer to a wrapper function appropriate to the foreign
-*        language interface. This wrapper function should have the
-*        same interface as astTranP (from the Mapping class), except
-*        that it takes a pointer to a function like "tran" as an additional
-*        first argument. The purpose of this wrapper is to invoke the
-*        transformation function via the pointer supplied, to pass it the
-*        necessary information derived from the remainder of its arguments,
-*        and then to return the results.
-*     flags
-*        This argument may be used to supply a set of flags which
-*        control the behaviour of any IntraMap which uses the
-*        registered transformation function. See the description of
-*        astIntraReg for details.
-*     purpose
-*        Pointer to a null-terminated string containing a short (one
-*        line) textual comment to describe the purpose of the
-*        transformation function.
-*     author
-*        Pointer to a null-terminated string containing the name of
-*        the author of the transformation function.
-*     contact
-*        Pointer to a null-terminated string containing contact
-*        details for the author of the transformation function
-*        (e.g. an e-mail address or URL). If any IntraMap using this
-*        transformation function is exported as part of a dataset to
-*        an external user who does not have access to the function,
-*        then these contact details should allow them to obtain the
-*        necessary code.
-
-*  Notes:
-*     - This function is only available through the public interface
-*     to the IntraMap class (not the protected interface) and is
-*     intended solely for use in implementing foreign language
-*     interfaces to this class.
-*-
-*/
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Register the transformation function together with the appropriate
-   wrapper function for the foreign language interface. */
-   IntraReg( name, nin, nout, tran, tran_wrap, flags, purpose, author,
-             contact, status );
-}
-
-static int MapMerge( AstMapping *this, int where, int series, int *nmap,
-                     AstMapping ***map_list, int **invert_list, int *status ) {
-/*
-*  Name:
-*     MapMerge
-
-*  Purpose:
-*     Simplify a sequence of Mappings containing an IntraMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     int MapMerge( AstMapping *this, int where, int series, int *nmap,
-*                   AstMapping ***map_list, int **invert_list, int *status )
-
-*  Class Membership:
-*     IntraMap method (over-rides the protected astMapMerge method
-*     inherited from the Mapping class).
-
-*  Description:
-*     This function attempts to simplify a sequence of Mappings by
-*     merging a nominated IntraMap in the sequence with its
-*     neighbours, so as to shorten the sequence if possible.
-*
-*     In many cases, simplification will not be possible and the
-*     function will return -1 to indicate this, without further
-*     action.
-*
-*     In most cases of interest, however, this function will either
-*     attempt to replace the nominated IntraMap with one which it
-*     considers simpler, or to merge it with the Mappings which
-*     immediately precede it or follow it in the sequence (both will
-*     normally be considered). This is sufficient to ensure the
-*     eventual simplification of most Mapping sequences by repeated
-*     application of this function.
-*
-*     In some cases, the function may attempt more elaborate
-*     simplification, involving any number of other Mappings in the
-*     sequence. It is not restricted in the type or scope of
-*     simplification it may perform, but will normally only attempt
-*     elaborate simplification in cases where a more straightforward
-*     approach is not adequate.
-
-*  Parameters:
-*     this
-*        Pointer to the nominated IntraMap which is to be merged with
-*        its neighbours. This should be a cloned copy of the IntraMap
-*        pointer contained in the array element "(*map_list)[where]"
-*        (see below). This pointer will not be annulled, and the
-*        IntraMap it identifies will not be modified by this function.
-*     where
-*        Index in the "*map_list" array (below) at which the pointer
-*        to the nominated IntraMap resides.
-*     series
-*        A non-zero value indicates that the sequence of Mappings to
-*        be simplified will be applied in series (i.e. one after the
-*        other), whereas a zero value indicates that they will be
-*        applied in parallel (i.e. on successive sub-sets of the
-*        input/output coordinates).
-*     nmap
-*        Address of an int which counts the number of Mappings in the
-*        sequence. On entry this should be set to the initial number
-*        of Mappings. On exit it will be updated to record the number
-*        of Mappings remaining after simplification.
-*     map_list
-*        Address of a pointer to a dynamically allocated array of
-*        Mapping pointers (produced, for example, by the astMapList
-*        method) which identifies the sequence of Mappings. On entry,
-*        the initial sequence of Mappings to be simplified should be
-*        supplied.
-*
-*        On exit, the contents of this array will be modified to
-*        reflect any simplification carried out. Any form of
-*        simplification may be performed. This may involve any of: (a)
-*        removing Mappings by annulling any of the pointers supplied,
-*        (b) replacing them with pointers to new Mappings, (c)
-*        inserting additional Mappings and (d) changing their order.
-*
-*        The intention is to reduce the number of Mappings in the
-*        sequence, if possible, and any reduction will be reflected in
-*        the value of "*nmap" returned. However, simplifications which
-*        do not reduce the length of the sequence (but improve its
-*        execution time, for example) may also be performed, and the
-*        sequence might conceivably increase in length (but normally
-*        only in order to split up a Mapping into pieces that can be
-*        more easily merged with their neighbours on subsequent
-*        invocations of this function).
-*
-*        If Mappings are removed from the sequence, any gaps that
-*        remain will be closed up, by moving subsequent Mapping
-*        pointers along in the array, so that vacated elements occur
-*        at the end. If the sequence increases in length, the array
-*        will be extended (and its pointer updated) if necessary to
-*        accommodate any new elements.
-*
-*        Note that any (or all) of the Mapping pointers supplied in
-*        this array may be annulled by this function, but the Mappings
-*        to which they refer are not modified in any way (although
-*        they may, of course, be deleted if the annulled pointer is
-*        the final one).
-*     invert_list
-*        Address of a pointer to a dynamically allocated array which,
-*        on entry, should contain values to be assigned to the Invert
-*        attributes of the Mappings identified in the "*map_list"
-*        array before they are applied (this array might have been
-*        produced, for example, by the astMapList method). These
-*        values will be used by this function instead of the actual
-*        Invert attributes of the Mappings supplied, which are
-*        ignored.
-*
-*        On exit, the contents of this array will be updated to
-*        correspond with the possibly modified contents of the
-*        "*map_list" array.  If the Mapping sequence increases in
-*        length, the "*invert_list" array will be extended (and its
-*        pointer updated) if necessary to accommodate any new
-*        elements.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Returned Value:
-*     If simplification was possible, the function returns the index
-*     in the "map_list" array of the first element which was
-*     modified. Otherwise, it returns -1 (and makes no changes to the
-*     arrays supplied).
-
-*  Notes:
-*     - A value of -1 will be returned if this function is invoked
-*     with the global error status set, or if it should fail for any
-*     reason.
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstIntraMap *intramap1;       /* Pointer to first IntraMap */
-   AstIntraMap *intramap2;       /* Pointer to second IntraMap */
-   AstMapping *new;              /* Pointer to replacement Mapping */
-   const char *class;            /* Pointer to Mapping class string */
-   int imap1;                    /* Index of first IntraMap */
-   int imap2;                    /* Index of second IntraMap */
-   int imap;                     /* Loop counter for Mappings */
-   int invert1;                  /* Invert flag value (1st IntraMap) */
-   int invert2;                  /* Invert flag value (2nd IntraMap) */
-   int nin1;                     /* No. input coordinates (1st IntraMap) */
-   int nout2;                    /* No. output coordinates (2nd IntraMap) */
-   int result;                   /* Result value to return */
-   int simpler;                  /* Mappings simplified? */
-
-/* Initialise the returned result. */
-   result = -1;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(this);
-
-/* Further initialisation. */
-   new = NULL;
-   simpler = 0;
-   nin1 = -1;
-
-/* We will only handle the case of IntraMaps in series and will
-   consider merging the nominated IntraMap with the Mapping which
-   follows it. Check that there is such a Mapping. */
-   if ( series && ( ( where + 1 ) < *nmap ) ) {
-
-/* Obtain the indices of the two potential IntraMaps to be merged and
-   a pointer to the first one. */
-      imap1 = where;
-      imap2 = where + 1;
-      intramap1 = (AstIntraMap *) ( *map_list )[ imap1 ];
-
-/* Obtain the Class string of the second Mapping and determine if it
-   is an IntraMap. */
-      class = astGetClass( ( *map_list )[ imap2 ] );
-      if ( astOK && !strcmp( class, "IntraMap" ) ) {
-
-/* Obtain a pointer to the second IntraMap. */
-         intramap2 = (AstIntraMap *) ( *map_list )[ imap2 ];
-
-/* Check that the two IntraMaps use the same transformation function
-   and have the same IntraFlag string (if set). */
-         if ( ( intramap1->ifun == intramap2->ifun ) &&
-              !strcmp( intramap1->intraflag ? intramap1->intraflag : "",
-                       intramap2->intraflag ? intramap2->intraflag : "" ) ) {
-
-/* Determine the number of input coordinates that the first IntraMap
-   would have if its Invert attribute were set to the value of the
-   associated invert flag. Take account of the current Invert
-   attribute in obtaining this value. */
-            invert1 = ( *invert_list )[ imap1 ];
-            if ( astGetInvert( intramap1 ) ) {
-               nin1 = invert1 ? astGetNin( intramap1 ) :
-                                astGetNout( intramap1 );
-            } else {
-               nin1 = invert1 ? astGetNout( intramap1 ) :
-                                astGetNin( intramap1 );
-            }
-
-/* Similarly, determine the number of output coordinates that the
-   second IntraMap would have. */
-            invert2 = ( *invert_list )[ imap2 ];
-            if ( astGetInvert( intramap2 ) ) {
-               nout2 = invert2 ? astGetNout( intramap2 ) :
-                                 astGetNin( intramap2 );
-            } else {
-               nout2 = invert2 ? astGetNin( intramap2 ) :
-                                 astGetNout( intramap2 );
-            }
-
-/* Check that the effect of applying the two IntraMaps will be to
-   preserve the number of coordinates. */
-            if ( astOK && ( nin1 == nout2 ) ) {
-
-/* If so, check if the first transformation function is applied in the
-   forward direction and the second in the inverse direction. If so,
-   note if this configuration can be simplified. */
-               if ( !invert1 && invert2 ) {
-                  simpler = tran_data[ intramap1->ifun ].flags & AST__SIMPFI;
-
-/* Similarly, if the first transformation function is applied in the
-   inverse direction and the second in the forward direction, then
-   note if this configuration can be simplified. */
-               } else if ( invert1 && !invert2 ) {
-                  simpler = tran_data[ intramap1->ifun ].flags & AST__SIMPIF;
-               }
-            }
-         }
-      }
-
-/* If the two IntraMaps can be simplified, create a UnitMap to replace
-   them. */
-      if ( simpler ) {
-         new = (AstMapping *) astUnitMap( nin1, "", status );
-
-/* Annul the pointers to the IntraMaps. */
-         if ( astOK ) {
-            ( *map_list )[ imap1 ] = astAnnul( ( *map_list )[ imap1 ] );
-            ( *map_list )[ imap2 ] = astAnnul( ( *map_list )[ imap2 ] );
-
-/* Insert the pointer to the replacement Mapping and initialise its
-   invert flag. */
-            ( *map_list )[ imap1 ] = new;
-            ( *invert_list )[ imap1 ] = 0;
-
-/* Loop to close the resulting gap by moving subsequent elements down
-   in the arrays. */
-            for ( imap = imap2 + 1; imap < *nmap; imap++ ) {
-               ( *map_list )[ imap - 1 ] = ( *map_list )[ imap ];
-               ( *invert_list )[ imap - 1 ] = ( *invert_list )[ imap ];
-            }
-
-/* Clear the vacated elements at the end. */
-            ( *map_list )[ *nmap - 1 ] = NULL;
-            ( *invert_list )[ *nmap - 1 ] = 0;
-
-/* Decrement the Mapping count and return the index of the first
-   modified element. */
-            ( *nmap )--;
-            result = imap1;
-         }
-      }
-   }
-
-/* If an error occurred, clear the returned result. */
-   if ( !astOK ) result = -1;
-
-/* Return the result. */
-   return result;
-}
-
-static void SetAttrib( AstObject *this_object, const char *setting, int *status ) {
-/*
-*  Name:
-*     SetAttrib
-
-*  Purpose:
-*     Set an attribute value for an IntraMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     void SetAttrib( AstObject *this, const char *setting, int *status )
-
-*  Class Membership:
-*     IntraMap member function (over-rides the astSetAttrib method inherited
-*     from the Mapping class).
-
-*  Description:
-*     This function assigns an attribute value for a IntraMap, 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 IntraMap.
-*     setting
-*        Pointer to a null terminated string specifying the new attribute
-*        value.
-*     status
-*        Pointer to the inherited status variable.
-*/
-
-/* Local Vaiables: */
-   AstIntraMap *this;            /* Pointer to the IntraMap structure */
-   int intraflag;                /* Offset of IntraFlag value in string */
-   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 IntraMap structure. */
-   this = (AstIntraMap *) 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. */
-
-/* IntraFlag. */
-/* ---------- */
-   if ( nc = 0,
-        ( 0 == astSscanf( setting, "intraflag=%n%*[^\n]%n", &intraflag, &nc ) )
-        && ( nc >= len ) ) {
-      astSetIntraFlag( this, setting + intraflag );
-
-/* Not recognised. */
-/* --------------- */
-/* If the attribute is not recognised, pass it on to the parent method
-   for further interpretation. */
-   } else {
-      (*parent_setattrib)( this_object, setting, status );
-   }
-}
-
-static int TestAttrib( AstObject *this_object, const char *attrib, int *status ) {
-/*
-*  Name:
-*     TestAttrib
-
-*  Purpose:
-*     Test if a specified attribute value is set for an IntraMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     int TestAttrib( AstObject *this, const char *attrib, int *status )
-
-*  Class Membership:
-*     IntraMap member function (over-rides the astTestAttrib protected
-*     method inherited from the Mapping class).
-
-*  Description:
-*     This function returns a boolean result (0 or 1) to indicate whether
-*     a value has been set for one of a IntraMap's attributes.
-
-*  Parameters:
-*     this
-*        Pointer to the IntraMap.
-*     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:
-*     - 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: */
-   AstIntraMap *this;            /* Pointer to the IntraMap structure */
-   int result;                   /* Result value to return */
-
-/* Initialise. */
-   result = 0;
-
-/* Check the global error status. */
-   if ( !astOK ) return result;
-
-/* Obtain a pointer to the IntraMap structure. */
-   this = (AstIntraMap *) this_object;
-
-/* Check the attribute name and test the appropriate attribute. */
-
-/* IntraFlag. */
-/* ---------- */
-   if ( !strcmp( attrib, "intraflag" ) ) {
-      result = astTestIntraFlag( this );
-
-/* Not recognised. */
-/* --------------- */
-/* If the attribute is 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 an IntraMap to transform a set of points.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     AstPointSet *Transform( AstMapping *this, AstPointSet *in,
-*                             int forward, AstPointSet *out, int *status )
-
-*  Class Membership:
-*     IntraMap member function (over-rides the astTransform protected
-*     method inherited from the Mapping class).
-
-*  Description:
-*     This function takes a IntraMap and a set of points encapsulated
-*     in a PointSet and transforms the points using the transformation
-*     function associated with the IntraMap.
-
-*  Parameters:
-*     this
-*        Pointer to the IntraMap.
-*     in
-*        Pointer to the PointSet holding the input coordinate data.
-*     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 IntraMap
-*     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: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstIntraMap *this;            /* Pointer to IntraMap structure */
-   AstMapping *id;               /* Public ID for the IntraMap supplied */
-   AstPointSet *result;          /* Pointer to output PointSet */
-   const double **ptr_in;        /* Pointer to input coordinate data */
-   double **ptr_out;             /* Pointer to output coordinate data */
-   int ncoord_in;                /* Number of coordinates per input point */
-   int ncoord_out;               /* Number of coordinates per output point */
-   int npoint;                   /* Number of points */
-   int ok;                       /* AST status OK? */
-   int status_value;             /* AST status value */
-
-/* Check the global error status. */
-   if ( !astOK ) return NULL;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(this_mapping);
-
-/* Obtain a pointer to the IntraMap structure. */
-   this = (AstIntraMap *) this_mapping;
-
-/* Apply the parent mapping using the stored pointer to the Transform
-   member function inherited from the parent Mapping class. This
-   function validates all arguments and generates an output PointSet
-   if necessary, but does not actually transform any coordinate
-   values. */
-   result = (*parent_transform)( this_mapping, in, forward, out, status );
-
-/* We will now extend the parent astTransform method by performing the
-   calculations needed to generate the output coordinate values. */
-
-/* Determine the numbers of points and coordinates per point from the
-   input and output PointSets and obtain pointers for accessing the
-   input and output coordinate values. */
-   npoint = astGetNpoint( in );
-   ncoord_in = astGetNcoord( in );
-   ncoord_out = astGetNcoord( result );
-   ptr_in = (const double **) astGetPoints( in );
-   ptr_out = astGetPoints( result );
-
-/* Determine whether to apply the forward or inverse transformation,
-   according to the direction specified and whether the Mapping has
-   been inverted. */
-   if ( astGetInvert( this ) ) forward = !forward;
-
-/* Obtain a public (external) ID for the IntraMap. This will be
-   required (instead of a true C pointer) by the transformation function,
-   since it is user-written. Clone the IntraMap pointer so that the call
-   to astAnnulID later on does not annul the IntraMap pointer. */
-   id = (AstMapping *) astMakeId( astClone( this ) );
-
-/* Locate the transformation function data associated with the
-   IntraMap and use the wrapper function to invoke the transformation
-   function itself. */
-   if ( ( ok = astOK ) ) {
-      LOCK_MUTEX2;
-      ( *tran_data[ this->ifun ].tran_wrap )( tran_data[ this->ifun ].tran,
-                                              id, npoint, ncoord_in, ptr_in,
-                                              forward, ncoord_out, ptr_out,
-                                              status );
-      UNLOCK_MUTEX2;
-
-/* If an error occurred, report a contextual error message. To ensure
-   that the location of the error appears in the message, we first clear
-   the global status (which makes the error system think this is the
-   first report). */
-      if ( !( ok = astOK ) ) {
-         status_value = astStatus;
-         astClearStatus;
-         astError( status_value,
-                   "astTransform(%s): Error signalled by \"%s\" "
-                   "transformation function.", status,
-                   astGetClass( this ), tran_data[ this->ifun ].name );
-      }
-   }
-
-/* Annul the external identifier. */
-   id = astMakeId( astAnnulId( id ) );
-
-/* If an error occurred here, but earlier steps were successful, then
-   something has happened to the external ID, so report a contextual
-   error message. */
-   if ( !astOK && ok ) {
-      astError( astStatus,
-                "astTransform(%s): %s pointer corrupted by \"%s\" "
-                "transformation function.", status,
-                astGetClass( this ), astGetClass( this ),
-                tran_data[ this->ifun ].name );
-   }
-
-/* If an error occurred, clear the returned pointer. If a new output
-   PointSet has been created, then delete it. */
-   if ( !astOK ) {
-      result = ( result == out ) ? NULL : astDelete( result );
-   }
-
-/* Return a pointer to the output PointSet. */
-   return result;
-}
-
-static void TranWrap( void (* tran)( AstMapping *, int, int, const double *[],
-                                     int, int, double *[] ),
-                      AstMapping *this, int npoint, int ncoord_in,
-                      const double *ptr_in[], int forward, int ncoord_out,
-                      double *ptr_out[], int *status ) {
-/*
-*  Name:
-*     TranWrap
-
-*  Purpose:
-*     Wrapper function to invoke a C transformation function.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void TranWrap( void (* tran)( AstMapping *, int, int, const double *[],
-*                                   int, int, double *[] ),
-*                    AstMapping *this, int npoint, int ncoord_in,
-*                    const double *ptr_in[], int forward, int ncoord_out,
-*                    double *ptr_out[], int *status )
-
-*  Class Membership:
-*     IntraMap member function.
-
-*  Description:
-*     This function invokes a C implementation of a transformation
-*     function (which resembles the astTranP function from the Mapping
-*     class).
-*
-*     This wrapper is essentially a dummy function for the C language.
-*     It may be replaced by alternative versions for foreign language
-*     interfaces, thus allowing transformation functions supplied by
-*     those languages to be invoked without knowledge of their
-*     interfaces.
-
-*  Parameters:
-*     tran
-*        Pointer to the transformation function to be invoked. This
-*        should resemble astTranP (but with the first argument
-*        omitted).
-*     this
-*        An external Mapping ID associated with the internal (true C) pointer
-*        for the IntraMap whose transformation is being evaluated.
-*     npoint
-*        The number of points to be transformed.
-*     ncoord_in
-*        The number of coordinates being supplied for each input point
-*        (i.e. the number of dimensions of the space in which the
-*        input points reside).
-*     ptr_in
-*        An array of pointers to double, with "ncoord_in"
-*        elements. Element "ptr_in[coord]" should point at the first
-*        element of an array of double (with "npoint" elements) which
-*        contain the values of coordinate number "coord" for each
-*        input (untransformed) point. The value of coordinate number
-*        "coord" for input point number "point" is therefore given by
-*        "ptr_in[coord][point]".
-*     forward
-*        A non-zero value indicates that the forward coordinate
-*        transformation is to be applied, while a zero value indicates
-*        that the inverse transformation should be used.
-*     ncoord_out
-*        The number of coordinates being generated for each output
-*        point (i.e. the number of dimensions of the space in which
-*        the output points reside). This need not be the same as
-*        "ncoord_in".
-*     ptr_out
-*        An array of pointers to double, with "ncoord_out"
-*        elements. Element "ptr_out[coord]" should point at the first
-*        element of an array of double (with "npoint" elements) into
-*        which the values of coordinate number "coord" for each output
-*        (transformed) point will be written.  The value of coordinate
-*        number "coord" for output point number "point" will therefore
-*        be found in "ptr_out[coord][point]".
-*     status
-*        Pointer to the inherited status value.
-*/
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Invoke the transformation function. */
-   ( *tran )( this, npoint, ncoord_in, ptr_in, forward, ncoord_out, ptr_out );
-}
-
-/* Functions which access class attributes. */
-/* ---------------------------------------- */
-/* Implement member functions to access the attributes associated with
-   this class using the macros defined for this purpose in the
-   "object.h" file. For a description of each attribute, see the class
-   interface (in the associated .h file). */
-
-/*
-*att++
-*  Name:
-*     IntraFlag
-
-*  Purpose:
-*     IntraMap identification string.
-
-*  Type:
-*     Public attribute.
-
-*  Synopsis:
-*     String.
-
-*  Description:
-c     This attribute allows an IntraMap to be flagged so that it is
-c     distinguishable from other IntraMaps. The transformation function
-c     associated with the IntraMap may then enquire the value of this
-c     attribute and adapt the transformation it provides according to the
-c     particular IntraMap involved.
-f     This attribute allows an IntraMap to be flagged so that it is
-f     distinguishable from other IntraMaps. The transformation routine
-f     associated with the IntraMap may then enquire the value of this
-f     attribute and adapt the transformation it provides according to the
-f     particular IntraMap involved.
-*
-c     Although this is a string attribute, it may often be useful to store
-c     numerical values here, encoded as a character string, and to use these
-c     as data within the transformation function. Note, however, that this
-c     mechanism is not suitable for transferring large amounts of data (more
-c     than about 1000 characters) to an IntraMap. For that purpose, global
-c     variables are recommended, although the IntraFlag value can be used to
-c     supplement this approach. The default IntraFlag value is an empty
-c     string.
-f     Although this is a string attribute, it may often be useful to store
-f     numerical values here, encoded as a character string, and to use these
-f     as data within the transformation routine. Note, however, that this
-f     mechanism is not suitable for transferring large amounts of data (more
-f     than about 1000 characters) to an IntraMap. For that purpose, global
-f     variables are recommended, although the IntraFlag value can be used to
-f     supplement this approach. The default IntraFlag value is an empty
-f     string.
-
-*  Applicability:
-*     IntraMap
-*        All IntraMaps have this attribute.
-
-*  Notes:
-c     - A pair of IntraMaps whose transformations may potentially cancel
-c     cannot be simplified to produce a UnitMap (e.g. using astSimplify)
-c     unless they have the same IntraFlag values. The test for equality is
-c     case-sensitive.
-f     - A pair of IntraMaps whose transformations may potentially cancel
-f     cannot be simplified to produce a UnitMap (e.g. using AST_SIMPLIFY)
-f     unless they have the same IntraFlag values. The test for equality is
-f     case-sensitive.
-*att--
-*/
-
-/* Clear the IntraFlag value by freeing the allocated memory and
-   assigning a NULL pointer. */
-astMAKE_CLEAR(IntraMap,IntraFlag,intraflag,astFree( this->intraflag ))
-
-/* Return a pointer to the IntraFlag value. */
-astMAKE_GET(IntraMap,IntraFlag,const char *,NULL,this->intraflag)
-
-/* Set a IntraFlag value by freeing any previously allocated memory,
-   allocating new memory, storing the string and saving the pointer to
-   the copy. */
-astMAKE_SET(IntraMap,IntraFlag,const char *,intraflag,astStore(
-                                                      this->intraflag, value,
-                                                      strlen( value ) +
-                                                      (size_t) 1 ))
-
-/* The IntraFlag value is set if the pointer to it is not NULL. */
-astMAKE_TEST(IntraMap,IntraFlag,( this->intraflag != NULL ))
-
-/* Copy constructor. */
-/* ----------------- */
-static void Copy( const AstObject *objin, AstObject *objout, int *status ) {
-/*
-*  Name:
-*     Copy
-
-*  Purpose:
-*     Copy constructor for IntraMap objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Copy( const AstObject *objin, AstObject *objout, int *status )
-
-*  Description:
-*     This function implements the copy constructor for IntraMap objects.
-
-*  Parameters:
-*     objin
-*        Pointer to the object to be copied.
-*     objout
-*        Pointer to the object being constructed.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Notes:
-*     -  This constructor makes a deep copy.
-*/
-
-/* Local Variables: */
-   AstIntraMap *in;              /* Pointer to input IntraMap */
-   AstIntraMap *out;             /* Pointer to output IntraMap */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Obtain pointers to the input and output IntraMaps. */
-   in = (AstIntraMap *) objin;
-   out = (AstIntraMap *) objout;
-
-/* For safety, first clear any references to the input memory from
-   the output IntraMap. */
-   out->intraflag = NULL;
-
-/* If necessary, allocate memory in the output IntraMap and store a
-   copy of the input IntraFlag string. */
-   if ( in->intraflag ) out->intraflag = astStore( NULL, in->intraflag,
-                                                   strlen( in->intraflag ) +
-                                                   (size_t) 1 );
-
-/* If an error occurred, free any allocated memory. */
-   if ( !astOK ) {
-      out->intraflag = astFree( out->intraflag );
-   }
-}
-
-/* Destructor. */
-/* ----------- */
-static void Delete( AstObject *obj, int *status ) {
-/*
-*  Name:
-*     Delete
-
-*  Purpose:
-*     Destructor for IntraMap objects.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     void Delete( AstObject *obj, int *status )
-
-*  Description:
-*     This function implements the destructor for IntraMap objects.
-
-*  Parameters:
-*     obj
-*        Pointer to the object to be deleted.
-*     status
-*        Pointer to the inherited status variable.
-
-*  Notes:
-*     This function attempts to execute even if the global error status is
-*     set.
-*/
-
-/* Local Variables: */
-   AstIntraMap *this;            /* Pointer to IntraMap */
-
-/* Obtain a pointer to the IntraMap structure. */
-   this = (AstIntraMap *) obj;
-
-/* Free the memory used for the IntraFlag string if necessary. */
-   this->intraflag = astFree( this->intraflag );
-}
-
-/* Dump function. */
-/* -------------- */
-static void Dump( AstObject *this_object, AstChannel *channel, int *status ) {
-/*
-*  Name:
-*     Dump
-
-*  Purpose:
-*     Dump function for IntraMap 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 IntraMap class to an output Channel.
-
-*  Parameters:
-*     this
-*        Pointer to the IntraMap whose data are being written.
-*     channel
-*        Pointer to the Channel to which the data are being written.
-*     status
-*        Pointer to the inherited status variable.
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS             /* Pointer to thread-specific global data */
-   AstIntraMap *this;             /* Pointer to the IntraMap structure */
-   const char *sval;              /* Pointer to string value */
-   int set;                       /* Attribute value set? */
-
-/* Check the global error status. */
-   if ( !astOK ) return;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(this_object);
-
-/* Obtain a pointer to the IntraMap structure. */
-   this = (AstIntraMap *) this_object;
-
-/* Write out values representing the instance variables for the
-   IntraMap class.  Accompany these with appropriate comment strings,
-   possibly depending on the values being written.*/
-
-/* Transformation function name. */
-/* ----------------------------- */
-   astWriteString( channel, "Fname", 1, 1, tran_data[ this->ifun ].name,
-                   "Name of transformation function" );
-
-/* IntraFlag string. */
-/* ----------------- */
-   set = TestIntraFlag( this, status );
-   sval = set ? GetIntraFlag( this, status ) : astGetIntraFlag( this );
-   astWriteString( channel, "Iflag", set, 0, sval,
-                   "IntraMap identification string" );
-
-/* Purpose string. */
-/* --------------- */
-   astWriteString( channel, "Purp", 1, 1, tran_data[ this->ifun ].purpose,
-                   "Purpose of function" );
-
-/* Author's name. */
-/* -------------- */
-   astWriteString( channel, "Auth", 1, 1, tran_data[ this->ifun ].author,
-                   "Author's name" );
-
-/* Contact details. */
-/* ---------------- */
-   astWriteString( channel, "Cntact", 1, 1, tran_data[ this->ifun ].contact,
-                   "Contact address" );
-}
-
-/* Standard class functions. */
-/* ========================= */
-/* Implement the astIsAIntraMap and astCheckIntraMap functions using the
-   macros defined for this purpose in the "object.h" header file. */
-astMAKE_ISA(IntraMap,Mapping)
-astMAKE_CHECK(IntraMap)
-
-AstIntraMap *astIntraMap_( const char *name, int nin, int nout,
-                           const char *options, int *status, ...) {
-/*
-*++
-*  Name:
-c     astIntraMap
-f     AST_INTRAMAP
-
-*  Purpose:
-*     Create an IntraMap.
-
-*  Type:
-*     Public function.
-
-*  Synopsis:
-c     #include "intramap.h"
-c     AstIntraMap *astIntraMap( const char *name, int nin, int nout,
-c                               const char *options, ... )
-f     RESULT = AST_INTRAMAP( NAME, NIN, NOUT, OPTIONS, STATUS )
-
-*  Class Membership:
-*     IntraMap constructor.
-
-*  Description:
-*     This function creates a new IntraMap and optionally initialises
-*     its attributes.
-*
-c     An IntraMap is a specialised form of Mapping which encapsulates
-c     a privately-defined coordinate transformation function
-c     (e.g. written in C) so that it may be used like any other AST
-c     Mapping. This allows you to create Mappings that perform any
-c     conceivable coordinate transformation.
-f     An IntraMap is a specialised form of Mapping which encapsulates
-f     a privately-defined coordinate transformation routine
-f     (e.g. written in Fortran) so that it may be used like any other
-f     AST Mapping. This allows you to create Mappings that perform any
-f     conceivable coordinate transformation.
-*
-*     However, an IntraMap is intended for use within a single program
-*     or a private suite of software, where all programs have access
-*     to the same coordinate transformation functions (i.e. can be
-*     linked against them). IntraMaps should not normally be stored in
-*     datasets which may be exported for processing by other software,
-*     since that software will not have the necessary transformation
-*     functions available, resulting in an error.
-*
-c     You must register any coordinate transformation functions to be
-c     used using astIntraReg before creating an IntraMap.
-f     You must register any coordinate transformation functions to be
-f     used using AST_INTRAREG before creating an IntraMap.
-
-*  Parameters:
-c     name
-f     NAME = CHARACTER * ( * ) (Given)
-c        Pointer to a null-terminated string containing the name of
-c        the transformation function to use (which should previously
-c        have been registered using astIntraReg). This name is case
-c        sensitive. All white space will be removed before use.
-f        A character string containing the name of the transformation
-f        routine to use (which should previously have been registered
-f        using AST_INTRAREG). This name is case sensitive. All white
-f        space will be removed before use.
-c     nin
-f     NIN = INTEGER (Given)
-c        The number of input coordinates. This must be compatible with
-c        the number of input coordinates accepted by the
-c        transformation function (as specified when this function was
-c        registered using astIntraReg).
-f        The number of input coordinates. This must be compatible with
-f        the number of input coordinates accepted by the
-f        transformation routine (as specified when this routine was
-f        registered using AST_INTRAREG).
-c     nout
-f     NOUT = INTEGER (Given)
-c        The number of output coordinates. This must be compatible
-c        with the number of output coordinates produced by the
-c        transformation function (as specified when this function was
-c        registered using astIntraReg).
-f        The number of output coordinates. This must be compatible
-f        with the number of output coordinates produced by the
-f        transformation routine (as specified when this routine was
-f        registered using AST_INTRAREG).
-c     options
-f     OPTIONS = CHARACTER * ( * ) (Given)
-c        Pointer to a null-terminated string containing an optional
-c        comma-separated list of attribute assignments to be used for
-c        initialising the new IntraMap. The syntax used is identical to
-c        that for the astSet function and may include "printf" format
-c        specifiers identified by "%" symbols in the normal way.
-f        A character string containing an optional comma-separated
-f        list of attribute assignments to be used for initialising the
-f        new IntraMap. The syntax used is identical to that for the
-f        AST_SET routine.
-c     ...
-c        If the "options" string contains "%" format specifiers, then
-c        an optional list of additional arguments may follow it in
-c        order to supply values to be substituted for these
-c        specifiers. The rules for supplying these are identical to
-c        those for the astSet function (and for the C "printf"
-c        function).
-f     STATUS = INTEGER (Given and Returned)
-f        The global status.
-
-*  Returned Value:
-c     astIntraMap()
-f     AST_INTRAMAP = INTEGER
-*        A pointer to the new IntraMap.
-
-*  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: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstIntraMap *new;             /* Pointer to new IntraMap */
-   va_list args;                 /* Variable argument list */
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Check the global status. */
-   if ( !astOK ) return NULL;
-
-/* Initialise the IntraMap, allocating memory and initialising the
-   virtual function table as well if necessary. */
-   new = astInitIntraMap( NULL, sizeof( AstIntraMap ), !class_init,
-                          &class_vtab, "IntraMap", name, nin, nout );
-
-/* If successful, note that the virtual function table has been
-   initialised. */
-   if ( astOK ) {
-      class_init = 1;
-
-/* Obtain the variable argument list and pass it along with the
-   options string to the astVSet method to initialise the new
-   IntraMap's attributes. */
-      va_start( args, status );
-      astVSet( new, options, NULL, args );
-      va_end( args );
-
-/* If an error occurred, clean up by deleting the new object. */
-      if ( !astOK ) new = astDelete( new );
-   }
-
-/* Return a pointer to the new IntraMap. */
-   return new;
-}
-
-AstIntraMap *astIntraMapId_( const char *name, int nin, int nout,
-                             const char *options, ... ) {
-/*
-*  Name:
-*     astIntraMapId_
-
-*  Purpose:
-*     Create an IntraMap.
-
-*  Type:
-*     Private function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     AstIntraMap *astIntraMapId_( const char *name, int nin, int nout,
-*                                  const char *options, ... )
-
-*  Class Membership:
-*     IntraMap constructor.
-
-*  Description:
-*     This function implements the external (public) interface to the
-*     astIntraMap constructor function. It returns an ID value
-*     (instead of a true C pointer) to external users, and must be
-*     provided because astIntraMap_ has a variable argument list which
-*     cannot be encapsulated in a macro (where this conversion would
-*     otherwise occur).
-*
-*     The variable argument list also prevents this function from
-*     invoking astIntraMap_ directly, so it must be a
-*     re-implementation of it in all respects, except for the final
-*     conversion of the result to an ID value.
-
-*  Parameters:
-*     As for astIntraMap_.
-
-*  Returned Value:
-*     The ID value associated with the new IntraMap.
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS            /* Pointer to thread-specific global data */
-   AstIntraMap *new;             /* Pointer to new IntraMap */
-   va_list args;                 /* Variable argument list */
-
-   int *status;                  /* Pointer to inherited status value */
-
-/* Get a pointer to the inherited status value. */
-   status = astGetStatusPtr;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Check the global status. */
-   if ( !astOK ) return NULL;
-
-/* Initialise the IntraMap, allocating memory and initialising the
-   virtual function table as well if necessary. */
-   new = astInitIntraMap( NULL, sizeof( AstIntraMap ), !class_init,
-                          &class_vtab, "IntraMap", name, nin, nout );
-
-/* If successful, note that the virtual function table has been
-   initialised. */
-   if ( astOK ) {
-      class_init = 1;
-
-/* Obtain the variable argument list and pass it along with the
-   options string to the astVSet method to initialise the new
-   IntraMap's attributes. */
-      va_start( args, options );
-      astVSet( new, options, NULL, args );
-      va_end( args );
-
-/* If an error occurred, clean up by deleting the new object. */
-      if ( !astOK ) new = astDelete( new );
-   }
-
-/* Return an ID value for the new IntraMap. */
-   return astMakeId( new );
-}
-
-
-AstIntraMap *astInitIntraMap_( void *mem, size_t size, int init,
-                               AstIntraMapVtab *vtab, const char *name,
-                               const char *fname, int nin, int nout, int *status ) {
-/*
-*+
-*  Name:
-*     astInitIntraMap
-
-*  Purpose:
-*     Initialise an IntraMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     AstIntraMap *astInitIntraMap( void *mem, size_t size, int init,
-*                                   AstIntraMapVtab *vtab, const char *name,
-*                                   const char *fname, int nin, int nout )
-
-*  Class Membership:
-*     IntraMap initialiser.
-
-*  Description:
-*     This function is provided for use by class implementations to
-*     initialise a new IntraMap object. It allocates memory (if
-*     necessary) to accommodate the IntraMap plus any additional data
-*     associated with the derived class.  It then initialises a
-*     IntraMap 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 IntraMap at the start of the memory passed
-*     via the "vtab" parameter.
-
-*  Parameters:
-*     mem
-*        A pointer to the memory in which the IntraMap is to be
-*        initialised.  This must be of sufficient size to accommodate
-*        the IntraMap data (sizeof(IntraMap)) 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 IntraMap (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 IntraMap structure, so a valid value must be
-*        supplied even if not required for allocating memory.
-*     init
-*        A logical flag indicating if the IntraMap'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 IntraMap.
-*     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).
-*     fname
-*        Pointer to a null-terminated string containing the name of
-*        the transformation function to be used, as previously
-*        registered using astIntraReg.
-*     nin
-*        The number of input coordinates.
-*     nout
-*        The number of output coordinates.
-
-*  Returned Value:
-*     A pointer to the new IntraMap.
-
-*  Notes:
-*     - A null pointer will be returned if this function is invoked
-*     with the global error status set, or if it should fail for any
-*     reason.
-*-
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS             /* Pointer to thread-specific global data */
-   AstIntraMap *new;              /* Pointer to new IntraMap */
-   char *clname;                  /* Cleaned transformation function name */
-   int found;                     /* Transformation function name found? */
-   int ifun;                      /* Loop counter for registered functions */
-
-/* Initialise. */
-   new = NULL;
-
-/* Check the global status. */
-   if ( !astOK ) return NULL;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(NULL);
-
-/* Initialise variables to avoid "used of uninitialised variable"
-   messages from dumb compilers. */
-   found = 0;
-   ifun = 0;
-
-/* If necessary, initialise the virtual function table. */
-   if ( init ) astInitIntraMapVtab( vtab, name );
-
-/* Clean (and validate) the transformation function name supplied. */
-   clname = CleanName( fname, "astIntraMap", status );
-
-/* Search for a registered transformation function name which matches. */
-   if ( astOK ) {
-      found = 0;
-      for ( ifun = 0; ifun < tran_nfun; ifun++ ) {
-         if ( ( found = !strcmp( clname, tran_data[ ifun ].name ) ) ) break;
-      }
-   }
-
-/* Free the memory containing the cleaned name string. */
-   clname = astFree( clname );
-
-/* If no match was found, then report an error. */
-   if ( astOK ) {
-      if ( !found ) {
-         astError( AST__URITF, "astInitIntraMap(%s): The transformation "
-                               "function \"%s\" has not been registered using "
-                               "astIntraReg.", status, name, clname );
-
-/* Check that the number of input coordinates is compatible with the
-   number used by the transformation function (as specified when it
-   was registered). Report an error if necessary. */
-      } else {
-         if ( ( nin != tran_data[ ifun ].nin ) &&
-              ( tran_data[ ifun ].nin != AST__ANY ) ) {
-            astError( AST__BADNI, "astInitIntraMap(%s): Number of input "
-                                  "coordinates (%d) does not match the number "
-                                  "used by the \"%s\" transformation function "
-                                  "(%d).", status, name, nin, tran_data[ ifun ].name,
-                                  tran_data[ ifun ].nin  );
-
-/* Similarly check the number of output coordinates. */
-         } else if ( ( nout != tran_data[ ifun ].nout ) &&
-                     ( tran_data[ ifun ].nout != AST__ANY ) ) {
-            astError( AST__BADNO, "astInitIntraMap(%s): Number of output "
-                                  "coordinates (%d) does not match the number "
-                                  "used by the \"%s\" transformation function "
-                                  "(%d).", status, name, nout, tran_data[ ifun ].name,
-                                  tran_data[ ifun ].nout  );
-
-/* If OK, initialise a Mapping structure (the parent class) as the
-   first component within the IntraMap structure, allocating memory if
-   necessary (note that this also provides further checks on the
-   validity of "nin" and "nout"). Specify whether the forward and
-   inverse transformations are defined. */
-         } else {
-            new = (AstIntraMap *) astInitMapping( mem, size, 0,
-                     (AstMappingVtab *) vtab, name, nin, nout,
-                     ( ( tran_data[ ifun ].flags & AST__NOFWD ) == 0 ),
-                     ( ( tran_data[ ifun ].flags & AST__NOINV ) == 0 ) );
-
-            if ( astOK ) {
-
-/* Initialise the IntraMap data. */
-/* ---------------------------- */
-/* Initialise the IntraFlag string pointer. */
-               new->intraflag = NULL;
-
-/* Store the index used to access the transformation function data. */
-               new->ifun = ifun;
-
-/* If an error occurred, clean up by deleting the new IntraMap. */
-               if ( !astOK ) new = astDelete( new );
-            }
-         }
-      }
-   }
-
-/* Return a pointer to the new IntraMap. */
-   return new;
-}
-
-AstIntraMap *astLoadIntraMap_( void *mem, size_t size,
-                               AstIntraMapVtab *vtab, const char *name,
-                               AstChannel *channel, int *status ) {
-/*
-*+
-*  Name:
-*     astLoadIntraMap
-
-*  Purpose:
-*     Load an IntraMap.
-
-*  Type:
-*     Protected function.
-
-*  Synopsis:
-*     #include "intramap.h"
-*     AstIntraMap *astLoadIntraMap( void *mem, size_t size,
-*                                    AstIntraMapVtab *vtab, const char *name,
-*                                    AstChannel *channel )
-
-*  Class Membership:
-*     IntraMap loader.
-
-*  Description:
-*     This function is provided to load a new IntraMap 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
-*     IntraMap 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 an IntraMap at the start of the memory
-*     passed via the "vtab" parameter.
-
-
-*  Parameters:
-*     mem
-*        A pointer to the memory into which the IntraMap is to be
-*        loaded.  This must be of sufficient size to accommodate the
-*        IntraMap data (sizeof(IntraMap)) 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 IntraMap (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 IntraMap 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(AstIntraMap) is used instead.
-*     vtab
-*        Pointer to the start of the virtual function table to be
-*        associated with the new IntraMap. If this is NULL, a pointer
-*        to the (static) virtual function table for the IntraMap 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 "IntraMap" is used instead.
-
-*  Returned Value:
-*     A pointer to the new IntraMap.
-
-*  Notes:
-*     - A null pointer will be returned if this function is invoked
-*     with the global error status set, or if it should fail for any
-*     reason.
-*-
-*/
-
-/* Local Variables: */
-   astDECLARE_GLOBALS             /* Pointer to thread-specific global data */
-   AstIntraMap *new;              /* Pointer to the new IntraMap */
-   char *author;                  /* Pointer to author's name string */
-   char *contact;                 /* Pointer to contact details string */
-   char *fname;                   /* Pointer to transformation function name */
-   char *purpose;                 /* Pointer to purpose comment string */
-   int found;                     /* Function name found? */
-   int ifun;                      /* Loop counter for registered functions */
-   int nin;                       /* Number of IntraMap input coordinates */
-   int nout;                      /* Number of IntraMap output coordinates */
-
-/* Initialise. */
-   new = NULL;
-
-/* Check the global error status. */
-   if ( !astOK ) return new;
-
-/* Get a pointer to the thread specific global data structure. */
-   astGET_GLOBALS(channel);
-
-/* If a NULL virtual function table has been supplied, then this is
-   the first loader to be invoked for this IntraMap. In this case the
-   IntraMap belongs to this class, so supply appropriate values to be
-   passed to the parent class loader (and its parent, etc.). */
-   if ( !vtab ) {
-      size = sizeof( AstIntraMap );
-      vtab = &class_vtab;
-      name = "IntraMap";
-
-/* If required, initialise the virtual function table for this class. */
-      if ( !class_init ) {
-         astInitIntraMapVtab( 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 IntraMap. */
-   new = astLoadMapping( mem, size, (AstMappingVtab *) vtab, name,
-                         channel );
-
-   if ( astOK ) {
-
-/* Read input data. */
-/* ================ */
-/* Request the input Channel to read all the input data appropriate to
-   this class into the internal "values list". */
-      astReadClassData( channel, "IntraMap" );
-
-/* Now read each individual data item from this list. */
-
-/* Transformation function name. */
-/* ----------------------------- */
-      fname = astReadString( channel, "fname", "" );
-
-/* IntraFlag string. */
-/* ----------------- */
-      new->intraflag = astReadString( channel, "iflag", NULL );
-
-/* Purpose string. */
-/* --------------- */
-      purpose = astReadString( channel, "purp", "" );
-
-/* Author's name. */
-/* -------------- */
-      author = astReadString( channel, "auth", "" );
-
-/* Contact details. */
-/* ---------------- */
-      contact = astReadString( channel, "cntact", "" );
-
-/* If OK, search the array of transformation function data to see if
-   the required transformation function has been registered. */
-      if ( astOK ) {
-         found = 0;
-         for ( ifun = 0; ifun < tran_nfun; ifun++ ) {
-            if ( ( found = !strcmp( fname, tran_data[ ifun ].name ) ) ) break;
-         }
-
-/* If the transformation function has not been registered, report an
-   error explaining how to obtain it from the author and register
-   it. */
-         if ( !found ) {
-            astError( AST__URITF, "astLoadIntraMap(%s): An IntraMap was read "
-                                  "which uses an unknown transformation "
-                                  "function.", status, astGetClass( channel ) );
-            astError( AST__URITF, "This is a private extension to the AST "
-                                  "library: to handle it, you must obtain the "
-                                  "source code from its author." , status);
-            astError( AST__URITF, "You can then register it with AST in your "
-                                  "software by calling astIntraReg (see "
-                                  "SUN/211)." , status);
-            astError( AST__URITF, " " , status);
-            astError( AST__URITF, "   Function name:   \"%s\".", status, fname );
-            astError( AST__URITF, "   Purpose:         \"%s\".", status, purpose );
-            astError( AST__URITF, "   Author:          \"%s\".", status, author );
-            astError( AST__URITF, "   Contact address: \"%s\".", status, contact );
-            astError( AST__URITF, " " , status);
-
-/* Obtain the numbers of input and output coordinates for the
-   IntraMap. Use parent methods for this, since if any derived class
-   has overridden these methods it may depend on data that have not
-   yet been loaded. */
-         } else {
-            nin = ( *parent_getnin )( (AstMapping *) new, status );
-            nout = ( *parent_getnout )( (AstMapping *) new, status );
-            if ( astOK ) {
-
-/* Check that the numbers of coordinates are compatible with the
-   numbers used by the transformation function, as specified when it
-   was registered. */
-               if ( ( nin != tran_data[ ifun ].nin ) &&
-                    ( tran_data[ ifun ].nin != AST__ANY ) ) {
-                  astError( AST__BADNI, "astLoadIntraMap(%s): The number of "
-                                        "input coordinates for the IntraMap "
-                                        "read (%d) does not match the number "
-                                        "used by the registered \"%s\" "
-                                        "transformation function (%d).", status,
-                                        astGetClass( channel ), nin,
-                                        tran_data[ ifun ].name,
-                                        tran_data[ ifun ].nin  );
-               } else if ( ( nout != tran_data[ ifun ].nout ) &&
-                           ( tran_data[ ifun ].nout != AST__ANY ) ) {
-                  astError( AST__BADNO, "astLoadIntraMap(%s): The number of "
-                                        "output coordinates for the IntraMap "
-                                        "read (%d) does not match the number "
-                                        "used by the registered \"%s\" "
-                                        "transformation function (%d).", status,
-                                        astGetClass( channel ), nout,
-                                        tran_data[ ifun ].name,
-                                        tran_data[ ifun ].nout  );
-
-/* If OK, store the index used to access the transformation function
-   data. */
-               } else {
-                  new->ifun = ifun;
-               }
-            }
-         }
-      }
-
-/* Free strings allocated by astReadString. */
-      fname = astFree( fname );
-      purpose = astFree( purpose );
-      author = astFree( author );
-      contact = astFree( contact );
-
-/* If an error occurred, clean up by deleting the new IntraMap. */
-      if ( !astOK ) new = astDelete( new );
-   }
-
-/* Return the new IntraMap pointer. */
-   return new;
-}
-
-/* Virtual function interfaces. */
-/* ============================ */
-/* These provide the external interface to the virtual functions defined by
-   this class. Each simply checks the global error status and then locates and
-   executes the appropriate member function, using the function pointer stored
-   in the object's virtual function table (this pointer is located using the
-   astMEMBER macro defined in "object.h").
-
-   Note that the member function may not be the one defined here, as it may
-   have been over-ridden by a derived class. However, it should still have the
-   same interface. */
-
-
-
-
-