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author | William Joye <wjoye@cfa.harvard.edu> | 2019-05-10 18:41:55 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2019-05-10 18:41:55 (GMT) |
commit | 75fab9d80911f74aaab738fa9ab8a4f9b0f57a6b (patch) | |
tree | 8d0d428ac62291f834ea8927bfa82c115ff1689d /ast/pointset.c | |
parent | 0609bafa2688ce94fbfdc1ea496b20c3fac732f1 (diff) | |
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upgrade ast 8.7.1
Diffstat (limited to 'ast/pointset.c')
-rw-r--r-- | ast/pointset.c | 3284 |
1 files changed, 0 insertions, 3284 deletions
diff --git a/ast/pointset.c b/ast/pointset.c deleted file mode 100644 index bf50e1f..0000000 --- a/ast/pointset.c +++ /dev/null @@ -1,3284 +0,0 @@ -/* -* Name: -* pointset.c - -* Purpose: -* Implement the PointSet class. - -* Description: -* This file implements the PointSet class. For a description of -* the class and its interface, see the .h file of the same name. - -* Inheritance: -* The PointSet class inherits from the Object class. - -* 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: -* 1-FEB-1996 (RFWS): -* Original version. -* 27-SEP-1996 (RFWS): -* Added external interface and I/O facilities. -* 8-JAN-2003 (DSB): -* Changed private InitVtab method to protected astInitPointSetVtab -* method. -* 9-SEP-2004 (DSB): -* Added astPermPoints. -* 5-OCT-2004 (DSB): -* Bug fix in astLoadPointSet - npoint was used as size for new array -* of pointers (changed to ncoord). -* 19-OCT-2004 (DSB): -* Added astSetNpoint. -* 2-NOV-2004 (DSB): -* - Do not write out AST__BAD axis values in the Dump function. -* - Override astEqual method. -* - Add protected PointAccuracy attribute. -* 7-JAN-2005 (DSB): -* Added astAppendPoints. -* 14-FEB-2006 (DSB): -* Override astGetObjSize. -* 22-FEB-2006 (DSB): -* Avoid allocating memory for "acc" unless needed. -* 1-MAY-2009 (DSB): -* Added astBndPoints. -* 16-JUN-2011 (DSB): -* Added astReplaceNan. -* 2-OCT-2012 (DSB): -* Check for Infs as well as NaNs. -* 24-MAY-2016 (DSB): -* Added astShowPoints. -*/ - -/* 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 PointSet - -/* Values that control the behaviour of the astReplaceNaN method. */ -#define IGNORE_NANS 0 -#define REPLACE_NANS 1 -#define REPORT_NANS 2 - -/* -* -* Name: -* MAKE_CLEAR - -* Purpose: -* Implement a method to clear a single value in a multi-valued attribute. - -* Type: -* Private macro. - -* Synopsis: -* #include "pointset.h" -* MAKE_CLEAR(attr,component,assign) - -* Class Membership: -* Defined by the PointSet class. - -* Description: -* This macro expands to an implementation of a private member function of -* the form: -* -* static void Clear<Attribute>( AstPointSet *this, int axis ) -* -* and an external interface function of the form: -* -* void astClear<Attribute>_( AstPointSet *this, int axis ) -* -* which implement a method for clearing a single value in a specified -* multi-valued attribute for an axis of a PointSet. The "axis" value -* must be in the range 0 to (ncoord-1). - -* Parameters: -* attr -* The name of the attribute to be cleared, as it appears in the function -* name (e.g. PointAccuracy in "astClearPointAccuracy"). -* component -* The name of the class structure component that holds the attribute -* value. -* assign -* An expression that evaluates to the value to assign to the component -* to clear its value. - -* Notes: -* - To avoid problems with some compilers, you should not leave any white -* space around the macro arguments. -* -*/ - -/* Define the macro. */ -#define MAKE_CLEAR(attr,component,assign) \ -\ -/* Private member function. */ \ -/* ------------------------ */ \ -static void Clear##attr( AstPointSet *this, int axis, int *status ) { \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return; \ -\ -/* Validate the axis index. */ \ - if( axis < 0 || axis >= this->ncoord ){ \ - astError( AST__AXIIN, "%s(%s): Index (%d) is invalid for attribute " \ - #attr " - it should be in the range 1 to %d.", status, \ - "astClear" #attr, astGetClass( this ), \ - axis + 1, this->ncoord ); \ -\ -/* Assign the "clear" value. */ \ - } else if( this->component ){ \ - this->component[ axis ] = (assign); \ - } \ -} \ -\ -/* External interface. */ \ -/* ------------------- */ \ -void astClear##attr##_( AstPointSet *this, int axis, int *status ) { \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return; \ -\ -/* Invoke the required method via the virtual function table. */ \ - (**astMEMBER(this,PointSet,Clear##attr))( this, axis, status ); \ -} - - -/* -* -* Name: -* MAKE_GET - -* Purpose: -* Implement a method to get a single value in a multi-valued attribute. - -* Type: -* Private macro. - -* Synopsis: -* #include "pointset.h" -* MAKE_GET(attr,type,bad_value,assign) - -* Class Membership: -* Defined by the PointSet class. - -* Description: -* This macro expands to an implementation of a private member function of -* the form: -* -* static <Type> Get<Attribute>( AstPointSet *this, int axis ) -* -* and an external interface function of the form: -* -* <Type> astGet<Attribute>_( AstPointSet *this, int axis ) -* -* which implement a method for getting a single value from a specified -* multi-valued attribute for an axis of a PointSet. The "axis" value -* must be in the range 0 to (ncoord-1). - - -* Parameters: -* attr -* The name of the attribute whose value is to be obtained, as it -* appears in the function name (e.g. PointAccuracy in "astGetPointAccuracy"). -* type -* The C type of the attribute. -* bad_value -* A constant value to return if the global error status is set, or if -* the function fails. -* assign -* An expression that evaluates to the value to be returned. This can -* use the string "axis" to represent the zero-based value index. - -* Notes: -* - To avoid problems with some compilers, you should not leave any white -* space around the macro arguments. -* -*/ - -/* Define the macro. */ -#define MAKE_GET(attr,type,bad_value,assign) \ -\ -/* Private member function. */ \ -/* ------------------------ */ \ -static type Get##attr( AstPointSet *this, int axis, int *status ) { \ - type result; /* Result to be returned */ \ -\ -/* Initialise */ \ - result = bad_value; \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return result; \ -\ -/* Validate the axis index. */ \ - if( axis < 0 || axis >= this->ncoord ){ \ - astError( AST__AXIIN, "%s(%s): Index (%d) is invalid for attribute " \ - #attr " - it should be in the range 1 to %d.", status, \ - "astGet" #attr, astGetClass( this ), \ - axis + 1, this->ncoord ); \ -\ -/* Assign the result value. */ \ - } else { \ - result = (assign); \ - } \ -\ -/* Check for errors and clear the result if necessary. */ \ - if ( !astOK ) result = (bad_value); \ -\ -/* Return the result. */ \ - return result; \ -} \ -/* External interface. */ \ -/* ------------------- */ \ -type astGet##attr##_( AstPointSet *this, int axis, int *status ) { \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return (bad_value); \ -\ -/* Invoke the required method via the virtual function table. */ \ - return (**astMEMBER(this,PointSet,Get##attr))( this, axis, status ); \ -} - -/* -* -* Name: -* MAKE_SET - -* Purpose: -* Implement a method to set a single value in a multi-valued attribute -* for a PointSet. - -* Type: -* Private macro. - -* Synopsis: -* #include "pointset.h" -* MAKE_SET(attr,type,component,assign,null) - -* Class Membership: -* Defined by the PointSet class. - -* Description: -* This macro expands to an implementation of a private member function of -* the form: -* -* static void Set<Attribute>( AstPointSet *this, int axis, <Type> value ) -* -* and an external interface function of the form: -* -* void astSet<Attribute>_( AstPointSet *this, int axis, <Type> value ) -* -* which implement a method for setting a single value in a specified -* multi-valued attribute for a PointSet. The "axis" value must be in -* the range 0 to (ncoord-1). - -* Parameters: -* attr -* The name of the attribute to be set, as it appears in the function -* name (e.g. PointAccuracy in "astSetPointAccuracy"). -* type -* The C type of the attribute. -* component -* The name of the class structure component that holds the attribute -* value. -* assign -* An expression that evaluates to the value to be assigned to the -* component. -* null -* The value to initialise newly created array elements to. - -* Notes: -* - To avoid problems with some compilers, you should not leave any white -* space around the macro arguments. -*- -*/ - -/* Define the macro. */ -#define MAKE_SET(attr,type,component,assign,null) \ -\ -/* Private member function. */ \ -/* ------------------------ */ \ -static void Set##attr( AstPointSet *this, int axis, type value, int *status ) { \ - int i; \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return; \ -\ -/* Validate the axis index. */ \ - if( axis < 0 || axis >= this->ncoord ){ \ - astError( AST__AXIIN, "%s(%s): Index (%d) is invalid for attribute " \ - #attr " - it should be in the range 1 to %d.", status, \ - "astSet" #attr, astGetClass( this ), \ - axis + 1, this->ncoord ); \ -\ -/* Store the new value in the structure component. */ \ - } else { \ - if( !this->component ){ \ - this->component = astMalloc( this->ncoord*sizeof( type ) ); \ - for( i = 0; i < this->ncoord; i++ ) { \ - this->component[ i ] = null; \ - } \ - } \ - this->component[ axis ] = (assign); \ - } \ -} \ -\ -/* External interface. */ \ -/* ------------------- */ \ -void astSet##attr##_( AstPointSet *this, int axis, type value, int *status ) { \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return; \ -\ -/* Invoke the required method via the virtual function table. */ \ - (**astMEMBER(this,PointSet,Set##attr))( this, axis, value, status ); \ -} - -/* -* -* Name: -* MAKE_TEST - -* Purpose: -* Implement a method to test if a single value has been set in a -* multi-valued attribute for a class. - -* Type: -* Private macro. - -* Synopsis: -* #include "pointset.h" -* MAKE_TEST(attr,assign) - -* Class Membership: -* Defined by the PointSet class. - -* Description: -* This macro expands to an implementation of a private member function of -* the form: -* -* static int Test<Attribute>( AstPointSet *this, int axis ) -* -* and an external interface function of the form: -* -* int astTest<Attribute>_( AstPointSet *this, int axis ) -* -* which implement a method for testing if a single value in a specified -* multi-valued attribute has been set for a class. The "axis" value -* must be in the range 0 to (ncoord-1). - -* Parameters: -* attr -* The name of the attribute to be tested, as it appears in the function -* name (e.g. PointAccuracy in "astTestPointAccuracy"). -* assign -* An expression that evaluates to 0 or 1, to be used as the returned -* value. This can use the string "axis" to represent the zero-based -* index of the value within the attribute. - -* Notes: -* - To avoid problems with some compilers, you should not leave any white -* space around the macro arguments. -*- -*/ - -/* Define the macro. */ -#define MAKE_TEST(attr,assign) \ -\ -/* Private member function. */ \ -/* ------------------------ */ \ -static int Test##attr( AstPointSet *this, int axis, int *status ) { \ - int result; /* Value to return */ \ -\ - result= 0; \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return result; \ -\ -/* Validate the axis index. */ \ - if( axis < 0 || axis >= this->ncoord ){ \ - astError( AST__AXIIN, "%s(%s): Index (%d) is invalid for attribute " \ - #attr " - it should be in the range 1 to %d.", status, \ - "astTest" #attr, astGetClass( this ), \ - axis + 1, this->ncoord ); \ -\ -/* Assign the result value. */ \ - } else { \ - result = (assign); \ - } \ -\ -/* Check for errors and clear the result if necessary. */ \ - if ( !astOK ) result = 0; \ -\ -/* Return the result. */ \ - return result; \ -} \ -/* External interface. */ \ -/* ------------------- */ \ -int astTest##attr##_( AstPointSet *this, int axis, int *status ) { \ -\ -/* Check the global error status. */ \ - if ( !astOK ) return 0; \ -\ -/* Invoke the required method via the virtual function table. */ \ - return (**astMEMBER(this,PointSet,Test##attr))( this, axis, status ); \ -} - -/* 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" /* Interface definition for this class */ - -/* Error code definitions. */ -/* ----------------------- */ -#include "ast_err.h" /* AST error codes */ - -/* C header files. */ -/* --------------- */ -#include <stdarg.h> -#include <stddef.h> -#include <stdlib.h> -#include <stdio.h> -#include <math.h> -#include <string.h> - -/* Module Variables. */ -/* ================= */ - -/* Address of this static variable is used as a unique identifier for - member of this class. */ -static int class_check; - -/* This static variable is used to hold an IEEE 754 quiet double precision - Nan value. */ -static double ast_nan; - -/* This static variable is used to hold an IEEE 754 quiet single precision - Nan value. */ -static float ast_nanf; - -/* Enable or disable the astReplaceNan method. */ -static int replace_nan = -1; - -/* Pointers to parent class methods which are extended by this class. */ -static const char *(* parent_getattrib)( AstObject *, const char *, int * ); -static int (* parent_testattrib)( AstObject *, const char *, int * ); -static void (* parent_clearattrib)( AstObject *, const char *, int * ); -static void (* parent_setattrib)( AstObject *, const char *, int * ); -static int (* parent_equal)( AstObject *, AstObject *, int * ); -static int (* parent_getobjsize)( AstObject *, int * ); - -/* Define macros for accessing each item of thread specific global data. */ -#ifdef THREAD_SAFE - -/* Define how to initialise thread-specific globals. */ -#define GLOBAL_inits \ - globals->Class_Init = 0; \ - globals->GetAttrib_Buff[ 0 ] = 0; - -/* Create the function that initialises global data for this module. */ -astMAKE_INITGLOBALS(PointSet) - -/* Define macros for accessing each item of thread specific global data. */ -#define class_init astGLOBAL(PointSet,Class_Init) -#define class_vtab astGLOBAL(PointSet,Class_Vtab) -#define getattrib_buff astGLOBAL(PointSet,GetAttrib_Buff) - -static pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER; -#define LOCK_MUTEX1 pthread_mutex_lock( &mutex1 ); -#define UNLOCK_MUTEX1 pthread_mutex_unlock( &mutex1 ); - -/* If thread safety is not needed, declare and initialise globals at static - variables. */ -#else - -static char getattrib_buff[ 101 ]; - - -/* Define the class virtual function table and its initialisation flag - as static variables. */ -static AstPointSetVtab class_vtab; /* Virtual function table */ -static int class_init = 0; /* Virtual function table initialised? */ - -#define LOCK_MUTEX1 -#define UNLOCK_MUTEX1 - -#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. */ -AstPointSet *astPointSetId_( int, int, const char *, int *, ...); - -/* Prototypes for Private Member Functions. */ -/* ======================================== */ -static const char *GetAttrib( AstObject *, const char *, int * ); -static double **GetPoints( AstPointSet *, int * ); -static int Equal( AstObject *, AstObject *, int * ); -static int GetNcoord( const AstPointSet *, int * ); -static int GetNpoint( const AstPointSet *, int * ); -static int GetObjSize( AstObject *, int * ); -static int ReplaceNaN( AstPointSet *, int * ); -static int TestAttrib( AstObject *, const char *, int * ); -static AstPointSet *AppendPoints( AstPointSet *, AstPointSet *, int * ); -static void BndPoints( AstPointSet *, double *, double *, int * ); -static void CheckPerm( AstPointSet *, const int *, const char *, int * ); -static void ClearAttrib( AstObject *, const char *, int * ); -static void Copy( const AstObject *, AstObject *, int * ); -static void Delete( AstObject *, int * ); -static void Dump( AstObject *, AstChannel *, int * ); -static void PermPoints( AstPointSet *, int, const int[], int * ); -static void SetAttrib( AstObject *, const char *, int * ); -static void SetNpoint( AstPointSet *, int, int * ); -static void SetPoints( AstPointSet *, double **, int * ); -static void SetSubPoints( AstPointSet *, int, int, AstPointSet *, int * ); -static void ShowPoints( AstPointSet *, int * ); - -static double GetPointAccuracy( AstPointSet *, int, int * ); -static int TestPointAccuracy( AstPointSet *, int, int * ); -static void ClearPointAccuracy( AstPointSet *, int, int * ); -static void SetPointAccuracy( AstPointSet *, int, double, int * ); - -/* Member functions. */ -/* ================= */ -static AstPointSet *AppendPoints( AstPointSet *this, AstPointSet *that, int *status ) { -/* -*+ -* Name: -* astAppendPoints - -* Purpose: -* Append one PointSet to another. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* AstPointSet *astAppendPoints( AstPointSet *this, AstPointSet *that ) - -* Class Membership: -* PointSet method. - -* Description: -* This function creates a new PointSet containing all the points in -* "this" followed by all the points in "that". - -* Parameters: -* this -* Pointer to the first PointSet. -* that -* Pointer to the second PointSet. - -* Returned Value: -* Pointer to the new PointSet. - -* Notes: -* - Axis accuracies are copied from "this". -* - The Ncoord attribute of the two PointSets must match. -* - NULL will be returned if an error has already occurred, or if this -* function should fail for any reason. -*- -*/ - -/* Local Variables: */ - AstPointSet *result; - double **ptr; - double **ptr1; - double **ptr2; - int ic; - int n1; - int n2; - int ncoord; - size_t nb2; - size_t nb1; - -/* Initialise */ - result = NULL; - -/* Check the global error status. */ - if ( !astOK ) return result; - -/* Check the two PointSets have the same Ncoord value. */ - ncoord = astGetNcoord( this ); - if( ncoord != astGetNcoord( that ) ) { - astError( AST__NPTIN, "astAppendPoints(%s): Number of coordinates " - "per point differ in the two supplied PointSets.", status, - astGetClass( this ) ); - -/* Calculate the new size for the PointSet. */ - } else { - n1 = astGetNpoint( this ); - n2 = astGetNpoint( that ); - -/* Create the new PointSet and get pointers to its data. */ - result = astPointSet( n1 + n2, ncoord, "", status ); - ptr1 = astGetPoints( this ); - ptr2 = astGetPoints( that ); - ptr = astGetPoints( result ); - if( astOK ) { - -/* Copy the axis values for each coordinate in turn. */ - nb1 = sizeof( double )*(size_t) n1; - nb2 = sizeof( double )*(size_t) n2; - for( ic = 0; ic < ncoord; ic++ ) { - memcpy( ptr[ ic ], ptr1[ ic ], nb1 ); - memcpy( ptr[ ic ] + n1, ptr2[ ic ], nb2 ); - } - -/* Copy any axis accuracies from "this". */ - result->acc = this->acc ? - astStore( NULL, this->acc, sizeof( double )*(size_t) ncoord ) - : NULL; - } - } - -/* Annul the result if an error occurred. */ - if( !astOK ) result = astAnnul( result ); - -/* Return the result. */ - return result; -} - -static void BndPoints( AstPointSet *this, double *lbnd, double *ubnd, int *status ) { -/* -*+ -* Name: -* astBndPoints - -* Purpose: -* Find the axis bounds of the points in a PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* void astBndPoints( AstPointSet *this, double *lbnd, double *ubnd ) - -* Class Membership: -* PointSet method. - -* Description: -* This function returns the lower and upper limits of the axis values -* of the points in a PointSet. - -* Parameters: -* this -* Pointer to the first PointSet. -* lbnd -* Pointer to an array in which to return the lowest value for -* each coordinate. The length of the array should equal the number -* returned by astGetNcoord. -* ubnd -* Pointer to an array in which to return the highest value for -* each coordinate. The length of the array should equal the number -* returned by astGetNcoord. - -*- -*/ - -/* Local Variables: */ - double **ptr; - double *p; - double lb; - double ub; - int ic; - int ip; - int nc; - int np; - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Get pointers to the PointSet data, the number of axes adn the number - of points. */ - ptr = astGetPoints( this ); - nc = astGetNcoord( this ); - np = astGetNpoint( this ); - -/* Check the pointers can be used safely. */ - if( astOK ) { - -/* Loop round each axis. */ - for( ic = 0; ic < nc; ic++ ) { - -/* Initialise the bounds for this axis. */ - lb = AST__BAD; - ub = AST__BAD; - -/* Search for the first good point. Use it to initialise the bounds and - break out of the loop. */ - p = ptr[ ic ]; - for( ip = 0; ip < np; ip++,p++ ) { - if( *p != AST__BAD ) { - lb = ub = *p; - break; - } - } - -/* Search through the remaining points. Update the bounds if the axis - value is good. */ - for( ; ip < np; ip++,p++ ) { - if( *p != AST__BAD ) { - if( *p < lb ) { - lb = *p; - } else if( *p > ub ) { - ub = *p; - } - } - } - -/* Store the returned bounds. */ - lbnd[ ic ] = lb; - ubnd[ ic ] = ub; - } - } -} - -static void CheckPerm( AstPointSet *this, const int *perm, const char *method, int *status ) { -/* -*+ -* Name: -* astCheckPerm - -* Purpose: -* Check that an array contains a valid permutation. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* void astCheckPerm( AstPointSet *this, const int *perm, const char *method ) - -* Class Membership: -* PointSet method. - -* Description: -* This function checks the validity of a permutation array that -* will be used to permute the order of a PointSet's axes. If the -* permutation specified by the array is not valid, an error is -* reported and the global error status is set. Otherwise, the -* function returns without further action. - -* Parameters: -* this -* Pointer to the PointSet. -* perm -* Pointer to an array of integers with the same number of -* elements as there are axes in the PointSet. For each axis, the -* corresponding integer gives the (zero based) axis index to be -* used to identify the axis values for that axis (using the -* un-permuted axis numbering). To be valid, the integers in -* this array should therefore all lie in the range zero to -* (ncoord-1) inclusive, where "ncoord" is the number of PointSet -* axes, and each value should occur exactly once. -* method -* Pointer to a constant null-terminated character string -* containing the name of the method that invoked this function -* to validate a permutation array. This method name is used -* solely for constructing error messages. - -* Notes: -* - Error messages issued by this function refer to the external -* (public) numbering system used for axes (which is one-based), -* whereas zero-based axis indices are used internally. -*- -*/ - -/* Local Variables: */ - int *there; /* Pointer to temporary array */ - int coord; /* Loop counter for axes */ - int ncoord; /* Number of PointSet axes */ - int valid; /* Permutation array is valid? */ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Initialise. */ - valid = 1; - -/* Obtain the number of PointSet axes and allocate a temporary array of - integers with the same number of elements. */ - ncoord = astGetNcoord( this ); - there = astMalloc( sizeof( int ) * (size_t) ncoord ); - if ( astOK ) { - -/* Initialise the temporary array to zero. */ - for ( coord = 0; coord < ncoord; coord++ ) there[ coord ] = 0; - -/* Scan the permutation array, checking that each permuted axis index it - contains is within the correct range. Note an error and quit checking - if an invalid value is found. */ - for ( coord = 0; coord < ncoord; coord++ ) { - if ( ( perm[ coord ] < 0 ) || ( perm[ coord ] >= ncoord ) ) { - valid = 0; - break; - -/* Use the temporary array to count how many times each valid axis index - occurs. */ - } else { - there[ perm[ coord ] ]++; - } - } - -/* If all the axis indices were within range, check to ensure that each value - occurred only once. */ - if ( valid ) { - for ( coord = 0; coord < ncoord; coord++ ) { - -/* Note an error and quit checking if any value did not occur exactly once. */ - if ( there[ coord ] != 1 ) { - valid = 0; - break; - } - } - } - } - -/* Free the temporary array. */ - there = astFree( there ); - -/* If an invalid permutation was detected and no other error has - occurred, then report an error (note we convert to one-based axis - numbering in the error message). */ - if ( !valid && astOK ) { - astError( AST__PRMIN, "%s(%s): Invalid coordinate permutation array.", status, - method, astGetClass( this ) ); - astError( AST__PRMIN, "Each coordinate index should lie in the range 1 to %d " - "and should occur only once.", status, ncoord ); - } -} - -static void ClearAttrib( AstObject *this_object, const char *attrib, int *status ) { -/* -* Name: -* ClearAttrib - -* Purpose: -* Clear an attribute value for a PointSet. - -* Type: -* Private function. - -* Synopsis: -* #include "pointset.h" -* void ClearAttrib( AstObject *this, const char *attrib, int *status ) - -* Class Membership: -* PointSet member function (over-rides the astClearAttrib -* protected method inherited from the Object class). - -* Description: -* This function clears the value of a specified attribute for a -* PointSet, so that the default value will subsequently be used. - -* Parameters: -* this -* Pointer to the PointSet. -* 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: */ - AstPointSet *this; /* Pointer to the PointSet structure */ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Obtain a pointer to the PointSet structure. */ - this = (AstPointSet *) this_object; - -/* Check the attribute name and clear the appropriate attribute. */ - -/* Test if the name matches any of the read-only attributes of this - class. If it does, then report an error. */ - if ( !strcmp( attrib, "ncoord" ) || - !strcmp( attrib, "npoint" ) ) { - astError( AST__NOWRT, "astClear: Invalid attempt to clear the \"%s\" " - "value for a %s.", status, attrib, astGetClass( this ) ); - astError( AST__NOWRT, "This is a read-only attribute." , status); - -/* If the attribute is still not recognised, pass it on to the parent - method for further interpretation. */ - } else { - (*parent_clearattrib)( this_object, attrib, status ); - } -} - -static int Equal( AstObject *this_object, AstObject *that_object, int *status ) { -/* -* Name: -* Equal - -* Purpose: -* Test if two PointSets are equivalent. - -* Type: -* Private function. - -* Synopsis: -* #include "pointset.h" -* int Equal( AstObject *this, AstObject *that, int *status ) - -* Class Membership: -* PointSet member function (over-rides the astEqual protected -* method inherited from the Object class). - -* Description: -* This function returns a boolean result (0 or 1) to indicate whether -* two PointSets are equivalent. - -* Parameters: -* this -* Pointer to the first PointSet. -* that -* Pointer to the second PointSet. -* status -* Pointer to the inherited status variable. - -* Returned Value: -* One if the PointSets are equivalent, zero otherwise. - -* Notes: -* - The two PointSets are considered equivalent if they have the same -* number of points, the same number of axis values per point, and the -* same axis values to within the absolute tolerance specified by the -* Accuracy attribute of the two PointSets. -* - 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 constants: */ -#define SMALL sqrt(DBL_MIN) - -/* Local Variables: */ - AstPointSet *that; /* Pointer to the second PointSet structure */ - AstPointSet *this; /* Pointer to the first PointSet structure */ - double **ptr_that; /* Pointer to axis values in second PointSet */ - double **ptr_this; /* Pointer to axis values in first PointSet */ - double *p_that; /* Pointer to next axis value in second PointSet */ - double *p_this; /* Pointer to next axis value in first PointSet */ - double acc1; /* Absolute accuracy for 1st PointSet axis value */ - double acc2; /* Absolute accuracy for 2nd PointSet axis value */ - double acc; /* Combined absolute accuracy */ - double acc_that; /* PointAccuracy attribute for 2nd PointSet */ - double acc_this; /* PointAccuracy attribute for 1st PointSet */ - int ic; /* Axis index */ - int ip; /* Point index */ - int nc; /* No. of axis values per point */ - int np; /* No. of points in each PointSet */ - int result; /* Result value to return */ - -/* Initialise. */ - result = 0; - -/* Check the global error status. */ - if ( !astOK ) return result; - -/* Invoke the Equal method inherited from the parent Object class. This checks - that the Objects are both of the same class (amongst other things). */ - if( (*parent_equal)( this_object, that_object, status ) ) { - -/* Obtain pointers to the two PointSet structures. */ - this = (AstPointSet *) this_object; - that = (AstPointSet *) that_object; - -/* Check the number of points and the number of axis values per point are - equal in the two PointSets. */ - np = astGetNpoint( this ); - nc = astGetNcoord( this ); - if( np == astGetNpoint( that ) && nc == astGetNcoord( that ) ) { - -/* Get pointers to the axis values.*/ - ptr_this = astGetPoints( this ); - ptr_that = astGetPoints( that ); - if( astOK ) { - -/* Assume the PointSets are equal until proven otherwise. */ - result = 1; - -/* Loop round each axis, until we find a difference. */ - for( ic = 0; ic < nc && result; ic++ ) { - -/* Get pointers to the next value for this axis. */ - p_this = ptr_this[ ic ]; - p_that = ptr_that[ ic ]; - -/* Get the absolute accuracies for this axis. The default value for this - attribute is AST__BAD. */ - acc_this = astGetPointAccuracy( this, ic ); - acc_that = astGetPointAccuracy( that, ic ); - -/* If both accuracies are available, combine them in quadrature. */ - if( acc_this != AST__BAD && acc_that != AST__BAD ) { - acc = sqrt( acc_this*acc_this + acc_that*acc_that ); - -/* Loop round all points on this axis */ - for( ip = 0; ip < np; ip++, p_this++, p_that++ ){ - -/* If either value is bad we do not need to compare values. */ - if( *p_this == AST__BAD || *p_that == AST__BAD ) { - -/* If one value is bad and one is good, they differ, so break. If both - values are bad they are equal so we continue. */ - if( *p_this != AST__BAD || *p_that != AST__BAD ) { - result = 0; - break; - } - -/* Otherwise (if both axis values are good), compare axis values, and break if - they differ by more than the absolute accuracy. */ - } else if( fabs( *p_this - *p_that ) > acc ) { - result = 0; - break; - } - } - -/* If either accuracy is unavailable, we use a default relative accuracy. */ - } else { - -/* Loop round all points on this axis */ - for( ip = 0; ip < np; ip++, p_this++, p_that++ ){ - -/* If either value is bad we do not need to compare values. */ - if( *p_this == AST__BAD || *p_that == AST__BAD ) { - -/* If one value is bad and one is good, they differ, so break. If both - values are bad they are equal so we continue. */ - if( *p_this != AST__BAD || *p_that != AST__BAD ) { - result = 0; - break; - } - -/* Otherwise (if both axis values are good), find the absolute error for - both values. */ - } else { - - if( acc_this == AST__BAD ) { - acc1 = fabs(*p_this)*DBL_EPSILON; - if( acc1 < SMALL ) acc1 = SMALL; - acc1 *= 1.0E3; - } else { - acc1 = acc_this; - } - - if( acc_that == AST__BAD ) { - acc2 = fabs(*p_that)*DBL_EPSILON; - if( acc2 < SMALL ) acc2 = SMALL; - acc2 *= 1.0E3; - } else { - acc2 = acc_that; - } - -/* Combine them in quadrature. */ - acc = sqrt( acc1*acc1 + acc2*acc2 ); - -/* Compare axis values, and break if they differ by more than the - absolute accuracy. */ - if( fabs( *p_this - *p_that ) > acc ) { - result = 0; - break; - } - } - } - } - } - } - } - } - -/* If an error occurred, clear the result value. */ - if ( !astOK ) result = 0; - -/* Return the result, */ - return result; -#undef SMALL -} - -static const char *GetAttrib( AstObject *this_object, const char *attrib, int *status ) { -/* -* Name: -* GetAttrib - -* Purpose: -* Get the value of a specified attribute for a PointSet. - -* Type: -* Private function. - -* Synopsis: -* #include "pointset.h" -* const char *GetAttrib( AstObject *this, const char *attrib, int *status ) - -* Class Membership: -* PointSet member function (over-rides the protected astGetAttrib -* method inherited from the Object class). - -* Description: -* This function returns a pointer to the value of a specified -* attribute for a PointSet, formatted as a character string. - -* Parameters: -* this -* Pointer to the PointSet. -* 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 PointSet, 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 PointSet. 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: */ - astDECLARE_GLOBALS /* Pointer to thread-specific global data */ - AstPointSet *this; /* Pointer to the PointSet structure */ - const char *result; /* Pointer value to return */ - int ncoord; /* Ncoord attribute value */ - int npoint; /* Npoint attribute value */ - -/* Initialise. */ - result = NULL; - -/* Check the global error status. */ - if ( !astOK ) return result; - -/* Get a pointer to the thread specific global data structure. */ - astGET_GLOBALS(this_object); - -/* Obtain a pointer to the PointSet structure. */ - this = (AstPointSet *) this_object; - -/* Compare "attrib" with each recognised attribute name in turn, - obtaining the value of the required attribute. If necessary, write - the value into "getattrib_buff" as a null-terminated string in an appropriate - format. Set "result" to point at the result string. */ - -/* Ncoord. */ -/* ------- */ - if ( !strcmp( attrib, "ncoord" ) ) { - ncoord = astGetNcoord( this ); - if ( astOK ) { - (void) sprintf( getattrib_buff, "%d", ncoord ); - result = getattrib_buff; - } - -/* Npoint. */ -/* ------- */ - } else if ( !strcmp( attrib, "npoint" ) ) { - npoint = astGetNpoint( this ); - if ( astOK ) { - (void) sprintf( getattrib_buff, "%d", npoint ); - result = getattrib_buff; - } - -/* If the attribute name was not recognised, pass it on to the parent - method for further interpretation. */ - } else { - result = (*parent_getattrib)( this_object, attrib, status ); - } - -/* Return the result. */ - return result; -} - -static int GetObjSize( AstObject *this_object, int *status ) { -/* -* Name: -* GetObjSize - -* Purpose: -* Return the in-memory size of an Object. - -* Type: -* Private function. - -* Synopsis: -* #include "pointset.h" -* int GetObjSize( AstObject *this, int *status ) - -* Class Membership: -* PointSet member function (over-rides the astGetObjSize protected -* method inherited from the Object class). - -* Description: -* This function returns the in-memory size of the supplied PointSet, -* in bytes. - -* Parameters: -* this -* Pointer to the Object. -* 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: */ - AstPointSet *this; /* Pointer to PointSet structure */ - int result; /* Result value to return */ - -/* Initialise. */ - result = 0; - -/* Check the global error status. */ - if ( !astOK ) return result; - -/* Obtain a pointers to the PointSet structure. */ - this = (AstPointSet *) 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->ptr ); - result += astTSizeOf( this->values ); - result += astTSizeOf( this->acc ); - -/* If an error occurred, clear the result value. */ - if ( !astOK ) result = 0; - -/* Return the result, */ - return result; -} - -static int GetNcoord( const AstPointSet *this, int *status ) { -/* -*+ -* Name: -* astGetNcoord - -* Purpose: -* Get the number of coordinate values per point from a PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* int astGetNcoord( const AstPointSet *this ) - -* Class Membership: -* PointSet method. - -* Description: -* This function returns the number of coordinate values per point (1 or -* more) for a PointSet. - -* Parameters: -* this -* Pointer to the PointSet. - -* Returned Value: -* The number of coordinate values per point. - -* Notes: -* - A value of zero is returned if this function is invoked with the -* global error status set, or if it should fail for any reason. -*- -*/ - -/* Check the global error status. */ - if ( !astOK ) return 0; - -/* Return the number of coordinate values. */ - return this->ncoord; -} - -static int GetNpoint( const AstPointSet *this, int *status ) { -/* -*+ -* Name: -* astGetNpoint - -* Purpose: -* Get the number of points in a PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* int astGetNpoint( const AstPointSet *this ) - -* Class Membership: -* PointSet method. - -* Description: -* This function returns the number of points (1 or more) in a PointSet. - -* Parameters: -* this -* Pointer to the PointSet. - -* Returned Value: -* The number of points. - -* Notes: -* - A value of zero is returned if this function is invoked with the -* global error status set, or if it should fail for any reason. -*- -*/ - -/* Check the global error status. */ - if ( !astOK ) return 0; - -/* Return the number of points. */ - return this->npoint; -} - -static double **GetPoints( AstPointSet *this, int *status ) { -/* -*+ -* Name: -* astGetPoints - -* Purpose: -* Get a pointer for the coordinate values associated with a PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* double **astGetPoints( AstPointSet *this ) - -* Class Membership: -* PointSet method. - -* Description: -* This function returns a pointer which grants access to the coordinate -* values associated with a PointSet. If the PointSet has previously had -* coordinate values associated with it, this pointer will identify these -* values. Otherwise, it will point at a newly-allocated region of memory -* (associated with the PointSet) in which new coordinate values may be -* stored. - -* Parameters: -* this -* Pointer to the PointSet. - -* Returned Value: -* A pointer to an array of type double* with ncoord elements (where ncoord -* is the number of coordinate values per point). Each element of this array -* points at an array of double, of size npoint (where npoint is the number -* of points in the PointSet), containing the values of that coordinate for -* each point in the set. Hence, the value of the i'th coordinate for the -* j'th point (where i and j are counted from zero) is given by ptr[i][j] -* where ptr is the returned pointer value. - -* Notes: -* - The returned pointer points at an array of pointers allocated -* internally within the PointSet. The values in this array may be changed -* by the caller, who is reponsible for ensuring that they continue to -* point at valid arrays of coordinate values. -* - No attempt should be made to de-allocate memory allocated by a -* PointSet to store coordinate values or pointers to them. This memory -* will be freed when the PointSet is deleted. -* - No count is kept of the number of pointers issued for the PointSet -* coordinate values. The caller must keep track of these. -* - A NULL pointer is returned if this function is invoked with the -* global error status set, or if it should fail for any reason. -*- -*/ - -/* Local Variables: */ - int i; /* Loop counter for coordinates */ - int nval; /* Number of values to be stored */ - -/* Check the global error status. */ - if ( !astOK ) return NULL; - -/* If the PointSet has an existing array of pointers (which point at coordinate - values), we will simply return a pointer to it. Otherwise, we must allocate - space to hold new coordinate values. */ - if( !this->ptr ) { - -/* Determine the number of coordinate values to be stored and allocate memory - to hold them, storing the pointer to this values array in the PointSet - structure. */ - nval = this->npoint * this->ncoord; - this->values = (double *) astMalloc( sizeof( double ) * (size_t) nval ); - -#ifdef DEBUG - for( i = 0; i < nval; i++ ) this->values[ i ] = 0.0; -#endif - -/* If OK, also allocate memory for the array of pointers into this values - array, storing a pointer to this pointer array in the PointSet structure. */ - if ( astOK ) { - this->ptr = (double **) astMalloc( sizeof( double * ) - * (size_t) this->ncoord ); - -/* If OK, initialise the pointer array to point into the values array. */ - if ( astOK ) { - for ( i = 0; i < this->ncoord; i++ ) { - this->ptr[ i ] = this->values + ( i * this->npoint ); - } - -/* If we failed to allocate the pointer array, then free the values array. */ - } else { - this->values = (double *) astFree( (void *) this->values ); - } - } - -#ifdef DEBUG - } else { - -/* Check for bad values */ - if( this->values ) { - int i, j; - for( i = 0; astOK && i < this->ncoord; i++ ) { - for( j = 0; j < this->npoint; j++ ) { - if( !finite( (this->ptr)[ i ][ j ] ) ) { - astError( AST__INTER, "astGetPoints(PointSet): Non-finite " - "axis value returned.", status); - break; - } - } - } - } - -#endif - } - -/* Return the required pointer. */ - return this->ptr; -} - -void astInitPointSetVtab_( AstPointSetVtab *vtab, const char *name, int *status ) { -/* -*+ -* Name: -* astInitPointSetVtab - -* Purpose: -* Initialise a virtual function table for a PointSet. - -* Type: -* Protected function. - -* Synopsis: -* #include "pointset.h" -* void astInitPointSetVtab( AstPointSetVtab *vtab, const char *name ) - -* Class Membership: -* PointSet vtab initialiser. - -* Description: -* This function initialises the component of a virtual function -* table which is used by the PointSet 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: */ - AstObjectVtab *object; /* Pointer to Object component of Vtab */ - astDECLARE_GLOBALS /* Pointer to thread-specific global data */ - const char *envvar; /* Pointer to environment variable value */ - size_t i; /* Index of next byte in NaN value */ - unsigned char *p; /* Pointer to next byte in NaN value */ - -/* Check the local error status. */ - if ( !astOK ) return; - -/* Get a pointer to the thread specific global data structure. */ - astGET_GLOBALS(NULL); - -/* Initialize the component of the virtual function table used by the - parent class. */ - astInitObjectVtab( (AstObjectVtab *) vtab, name ); - -/* Store a unique "magic" value in the virtual function table. This - will be used (by astIsAPointSet) 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 = &(((AstObjectVtab *) vtab)->id); - -/* Initialise member function pointers. */ -/* ------------------------------------ */ -/* Store pointers to the member functions (implemented here) that - provide virtual methods for this class. */ - vtab->AppendPoints = AppendPoints; - vtab->BndPoints = BndPoints; - vtab->GetNcoord = GetNcoord; - vtab->GetNpoint = GetNpoint; - vtab->GetPoints = GetPoints; - vtab->PermPoints = PermPoints; - vtab->ReplaceNaN = ReplaceNaN; - vtab->SetPoints = SetPoints; - vtab->SetNpoint = SetNpoint; - vtab->SetSubPoints = SetSubPoints; - vtab->ShowPoints = ShowPoints; - - vtab->GetPointAccuracy = GetPointAccuracy; - vtab->SetPointAccuracy = SetPointAccuracy; - vtab->TestPointAccuracy = TestPointAccuracy; - vtab->ClearPointAccuracy = ClearPointAccuracy; - -/* Save the inherited pointers to methods that will be extended, and - replace them with pointers to the new member functions. */ - object = (AstObjectVtab *) vtab; - - 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_equal = object->Equal; - object->Equal = Equal; - parent_getobjsize = object->GetObjSize; - object->GetObjSize = GetObjSize; - -/* Declare the copy constructor, destructor and class dump function. */ - astSetCopy( vtab, Copy ); - astSetDelete( vtab, Delete ); - astSetDump( vtab, Dump, "PointSet", "Container for a set of points" ); - -/* Calculate single and double precision NaN values and store in static - module variables. Setting all bits to 1 produces a quiet NaN. */ - LOCK_MUTEX1 - p = (unsigned char *) &ast_nan; - for( i = 0; i < sizeof( ast_nan ); i++ ) *(p++) = 255; - p = (unsigned char *) &ast_nanf; - for( i = 0; i < sizeof( ast_nanf ); i++ ) *(p++) = 255; - -/* See what action the astReplaceNaN method should perform. This - is determined by the value of the AST_REPLACE_NAN environment - variable. Not set = do not check for NaNs, "1" = replace NaNs with - AST__BAD silently, anything else = report an error if any NaNs are - encountered. */ - if( replace_nan == -1 ) { - envvar = getenv( "AST_REPLACE_NAN" ); - if( !envvar ) { - replace_nan = IGNORE_NANS; - } else if( !strcmp( envvar, "1" ) ) { - replace_nan = REPLACE_NANS; - } else { - replace_nan = REPORT_NANS; - } - } - UNLOCK_MUTEX1 - -/* 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) ); - } -} - -double astCheckNaN_( double value ) { -/* -*+ -* Name: -* astCheckNaN - -* Purpose: -* Substitute a NaN for a supplied value if the supplied value is -* AST__NAN. - -* Type: -* Protected function. - -* Synopsis: -* #include "pointset.h" -* double astCheckNaN( double value ) - -* Class Membership: -* PointSet method. - -* Description: -* If the supplied double is AST__NAN then this function returns an -* IEEE double precision NaN value. Otherwise it returns the supplied -* value. - -* Parameters: -* valuethis -* The value to check. - -* Returned Value: -* The suppleid value, or NaN. - -* Notes: -* - This function does not check the inherited status. - -*- -*/ - return ( value == AST__NAN ) ? ast_nan : value; -} - -float astCheckNaNF_( float value ) { -/* -*+ -* Name: -* astCheckNaNF - -* Purpose: -* Substitute a NaN for a supplied value if the supplied value is -* AST__NANF. - -* Type: -* Protected function. - -* Synopsis: -* #include "pointset.h" -* float astCheckNaNF( float value ) - -* Class Membership: -* PointSet method. - -* Description: -* If the supplied float is AST__NANF then this function returns an -* IEEE single precision NaN value. Otherwise it returns the supplied -* value. - -* Parameters: -* valuethis -* The value to check. - -* Returned Value: -* The suppleid value, or NaN. - -* Notes: -* - This function does not check the inherited status. - -*- -*/ - return ( value == AST__NANF ) ? ast_nanf : value; -} - -static void PermPoints( AstPointSet *this, int forward, const int perm[], int *status ) { -/* -*+ -* Name: -* astPermPoints - -* Purpose: -* Permute the order of a PointSet's axes. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* void astPermPoints( AstPointSet *this, int forward, const int perm[] ) - -* Class Membership: -* PointSet method. - -* Description: -* This function permutes the order in which a PointSet's axes occur. - -* Parameters: -* this -* Pointer to the PointSet. -* forward -* The direction in which the permutation is to be applied. This -* controls the use of the "perm" arrays. If a non-zero value is -* given, then the indices into the "perm" array correspond to the -* indices of the coordinates in the returned PointSet, and the -* values stored in the "perm" array correspond to the indices of -* the coordinates in the supplied PointSet. If a zero value is -* given, then the indices into the "perm" array correspond to the -* indices of the coordinates in the supplied PointSet, and the -* values stored in the "perm" array correspond to the indices of -* the coordinates in the returnedPointSet. -* perm -* An array of int (with one element for each axis of the PointSet) -* which lists the axes in their new order. How this array is use -* depends on the value supplied for "forward". - -* Notes: -* - Only genuine permutations of the axis order are permitted, so -* each axis must be referenced exactly once in the "perm" array. -* - If more than one axis permutation is applied to a PointSet, the -* effects are cumulative. -*- -*/ - -/* Local Variables: */ - double **old; /* Pointer to copy of old pointer array */ - int coord; /* Loop counter for axes */ - int ncoord; /* Number of axes */ - -/* Check the global error status. Return without action if no data is - associated with the PointSet. */ - if ( !astOK || !this->ptr ) return; - -/* Validate the permutation array, to check that it describes a genuine - permutation. */ - CheckPerm( this, perm, "astPermPoints", status ); - -/* Obtain the number of PointSet axes. */ - ncoord = astGetNcoord( this ); - -/* Allocate memory and use it to store a copy of the old pointers array for - the PointSet. */ - old = astStore( NULL, this->ptr, sizeof( double * ) * (size_t) ncoord ); - -/* Apply the new axis permutation cumulatively to the old one and store the - result in the PointSet. */ - if ( astOK ) { - if( forward ) { - for ( coord = 0; coord < ncoord; coord++ ) { - this->ptr[ coord ] = old[ perm[ coord ] ]; - } - } else { - for ( coord = 0; coord < ncoord; coord++ ) { - this->ptr[ perm[ coord ] ] = old[ coord ]; - } - } - } - -/* Free the temporary copy of the old array. */ - old = astFree( old ); -} - -static int ReplaceNaN( AstPointSet *this, int *status ) { -/* -*+ -* Name: -* astReplaceNaN - -* Purpose: -* Check for NaNs in a PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* int astReplaceNaNs( AstPointSet *this ) - -* Class Membership: -* PointSet method. - -* Description: -* The behaviour of this method is determined by the AST_REPLACE_NAN -* environment variable. If AST_REPLACE_NAN is undefined, then the -* method returns without action. If AST_REPLACE_NAN is "1", then the -* method examines the supplied PointSet and replaces any NaN values -* with AST__BAD. If AST_REPLACE_NAN has any other value, any NaNs in -* the supplied PointSet are still replaced, but in addition an error -* is reported. - -* Parameters: -* this -* Pointer to the PointSet. - -* Returned Value: -* Non-zero if any NaN values were found in the PointSet. If AST_REPLACE_NAN -* is undefined, then zero is always returned. - -* Notes: -* The value of the AST_REPLACE_NAN environment variable is obtained -* only once, when the PointSet virtual function table is first -* created. This value is saved for all subsequent invocations of this -* method. - -*- -*/ - -/* Local Variables: */ - double **ptr; - double *p0; - double *p; - int ic; - int nc; - int np; - int result; - -/* Initialise */ - result = 0; - -/* Check the global error status. */ - if ( !astOK ) return result; - -/* Unless the AST_REPALCE_NAN environment variable is undefined, check - for NaNs in the supplied PointSet, replacing any with AST__BAD. */ - if( replace_nan != IGNORE_NANS ) { - ptr = astGetPoints( this ); - if( ptr ) { - nc = astGetNcoord( this ); - np = astGetNpoint( this ); - for( ic = 0; ic < nc; ic++ ) { - p = ptr[ ic ]; - p0 = p + np; - for( ; p < p0; p++ ) { - if( !astISFINITE(*p) ) { - result = 1; - *p = AST__BAD; - } - } - } - -/* If any NaNs were found, and AST_REPLACE_NAN is not set to "1", report - an error. */ - if( result && replace_nan == REPORT_NANS ) { - astError( AST__ISNAN, "astReplaceNan(%s): One or more NaN values " - "were encountered within an AST PointSet.", status, - astGetClass( this ) ); - } - } - } - -/* Return the result. */ - return result; -} - -static void SetAttrib( AstObject *this_object, const char *setting, int *status ) { -/* -* Name: -* SetAttrib - -* Purpose: -* Set an attribute value for a PointSet. - -* Type: -* Private function. - -* Synopsis: -* #include "pointset.h" -* void SetAttrib( AstObject *this, const char *setting ) - -* Class Membership: -* PointSet member function (over-rides the astSetAttrib protected -* method inherited from the Object class). - -* Description: -* This function assigns an attribute value for a PointSet, 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 PointSet. -* setting -* Pointer to a null-terminated string specifying the new -* attribute value. -*/ - -/* Local Variables: */ - AstPointSet *this; /* Pointer to the PointSet structure */ - int len; /* Length of setting string */ - int nc; /* Number of characters read by astSscanf */ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Obtain a pointer to the PointSet structure. */ - this = (AstPointSet *) this_object; - -/* Obtain the length of the setting string. */ - len = (int) 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. */ - -/* Define a macro to see if the setting string matches any of the - read-only attributes of this class. */ -#define MATCH(attrib) \ - ( nc = 0, ( 0 == astSscanf( setting, attrib "=%*[^\n]%n", &nc ) ) && \ - ( nc >= len ) ) - -/* Use this macro to report an error if a read-only attribute has been - specified. */ - if ( MATCH( "ncoord" ) || - MATCH( "npoint" ) ) { - astError( AST__NOWRT, "astSet: The setting \"%s\" is invalid for a %s.", status, - setting, astGetClass( this ) ); - astError( AST__NOWRT, "This is a read-only attribute." , status); - -/* If the attribute is still not recognised, pass it on to the parent - method for further interpretation. */ - } else { - (*parent_setattrib)( this_object, setting, status ); - } - -/* Undefine macros local to this function. */ -#undef MATCH -} - -static void SetNpoint( AstPointSet *this, int npoint, int *status ) { -/* -*+ -* Name: -* astSetNpoint - -* Purpose: -* Reduce the number of points in a PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* void astSetNpoint( AstPointSet *this, int npoint ) - -* Class Membership: -* PointSet method. - -* Description: -* This function reduces the number of points stored in a PointSet. -* Points with indices beyond the new size will be discarded. - -* Parameters: -* this -* Pointer to the PointSet. -* npoint -* The new value for the number of points in the PointSet. Must be -* less than or equal to the original size of the PointSet, and -* greater than zero. -*- -*/ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Check the new size is valid. */ - if( npoint < 1 || npoint > this->npoint ) { - astError( AST__NPTIN, "astSetNpoint(%s): Number of points (%d) is " - "not valid.", status, astGetClass( this ), npoint ); - astError( AST__NPTIN, "Should be in the range 1 to %d.", status, this->npoint ); - -/* Store the new size. */ - } else { - this->npoint = npoint; - } -} - -static void SetPoints( AstPointSet *this, double **ptr, int *status ) { -/* -*+ -* Name: -* astSetPoints - -* Purpose: -* Associate coordinate values with a PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* void astSetPoints( AstPointSet *this, double **ptr ) - -* Class Membership: -* PointSet method. - -* Description: -* This function associates coordinate values with a PointSet by storing an -* array of pointers to the values within the PointSet object. A pointer to -* this pointer array will later be returned when astGetPoints is used to -* locate the coordinate values. If values are already associated with the -* PointSet, the array of pointers to them is over-written by the new values -* (any internally allocated memory holding the actual coordinate values -* first being freed). - -* Parameters: -* this -* Pointer to the PointSet. -* ptr -* Pointer to an array of type double* with ncoord elements (where ncoord -* is the number of coordinate values per point in the PointSet). Each -* element of this array should point at an array of double with npoint -* elements (where npoint is the number of points in the PointSet), -* containing the values of that coordinate for each point in the set. -* Hence, the value of the i'th coordinate for the j'th point (where i -* and j are counted from zero) should be given by ptr[i][j]. - -* Returned Value: -* void - -* Notes: -* - It is the caller's responsibility to ensure that the pointer supplied -* points at a valid array of pointers that point at arrays of coordinate -* values. This is only superficially validated by this function, which then -* simply stores a copy of the supplied array of pointers for later use. -* The caller must also manage any allocation (and freeing) of memory for -* these coordinate values. -* - This functon makes a copy of the array of pointers supplied, but does -* not copy the coordinate values they point at. If a PointSet containing a -* copy of the coordinate values is required, internal memory should be -* allocated within the PointSet by calling astGetPoints before storing any -* pointer, and then copying the values into this memory. Alternatively, -* using astCopy to produce a deep copy of a PointSet will also copy the -* coordinate values. -* - A NULL pointer may be supplied as the "ptr" argument, in which case -* any previously stored array of pointers will be cancelled (and internal -* memory freed if necessary) and subsequent use of astGetPoints will then -* cause memory to be allocated internally by the PointSet to hold new -* values. -*- -*/ - -/* Local Variables: */ - int i; /* Loop counter for coordinates */ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* If the pointer supplied is not NULL, inspect each pointer in the array it - points at to check that none of these are NULL. This validates (to some - extent) the caller's data structure. Report an error and quit checking if a - NULL pointer is found. */ - if ( ptr ) { - for ( i = 0; i < this->ncoord; i++ ) { - if ( !ptr[ i ] ) { - astError( AST__PDSIN, "astSetPoints(%s): Invalid NULL pointer in " - "element %d of array of pointers to coordinate values.", status, - astGetClass( this ), i ); - break; - } - } - } - -/* Do not carry on if the data structure is obviously invalid. */ - if ( astOK ) { - -/* Free any memory previously allocated to store coordinate values. */ - this->values = (double *) astFree( (void *) this->values ); - -/* If a new array of pointers has been provided, (re)allocate memory and store - a copy of the array in it, saving a pointer to this copy in the PointSet - structure. */ - if ( ptr ) { - this->ptr = (double **) astStore( (void *) this->ptr, - (const void *) ptr, - sizeof( double * ) - * (size_t) this->ncoord ); - -/* If no pointer array was provided, free the previous one (if any). */ - } else { - this->ptr = (double **) astFree( (void *) this->ptr ); - } - } -} - -static void SetSubPoints( AstPointSet *point1, int point, int coord, - AstPointSet *point2, int *status ) { -/* -*+ -* Name: -* astSetSubPoints - -* Purpose: -* Associate a subset of one PointSet with another PointSet. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* void astSetSubPoints( AstPointSet *point1, int point, int coord, -* AstPointSet *point2 ) - -* Class Membership: -* PointSet method. - -* Description: -* This function selects a subset of the coordinate values associated with -* one PointSet and associates them with another PointSet. The second -* PointSet may then be used to access the subset. Any previous coordinate -* value association with the second PointSet is replaced. - -* Parameters: -* point1 -* Pointer to the first PointSet, from which a subset is to be selected. -* point -* The index of the first point (counting from zero) which is to appear -* in the subset (the number of points is determined by the size of the -* second PointSet). -* coord -* The index of the first coordinate (counting from zero) which is to -* appear in the subset (the number of coordinates is determined by the -* size of the second PointSet). -* point2 -* Second PointSet, with which the subset of coordinate values is to be -* associated. - -* Returned Value: -* void - -* Notes: -* - The range of points and coordinates selected must lie entirely within -* the first PointSet. -* - This function does not make a copy of the coordinate values, but -* merely stores pointers to the required subset of values associated with -* the first PointSet. If a PointSet containing a copy of the subset's -* coordinate values is required, then astCopy should be used to make a -* deep copy from the second PointSet. -* - If the first PointSet does not yet have coordinate values associated -* with it, then space will be allocated within it to hold values (so that -* the second PointSet has somewhere to point at). -*- -*/ - -/* Local Variables: */ - double ** ptr2; /* Pointer to new pointer array */ - double **ptr1; /* Pointer to original pointer array */ - int i; /* Loop counter for coordinates */ - int ncoord1; /* Number of coordinates in first PointSet */ - int ncoord2; /* Number of coordinates in second PointSet */ - int npoint1; /* Number of points in first PointSet */ - int npoint2; /* Number of points in second PointSet */ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Obtain the sizes of both PointSets. */ - npoint1 = astGetNpoint( point1 ); - npoint2 = astGetNpoint( point2 ); - ncoord1 = astGetNcoord( point1 ); - ncoord2 = astGetNcoord( point2 ); - -/* Check if the range of points required lies within the first PointSet and - report an error if it does not. */ - if ( astOK ) { - if ( ( point < 0 ) || ( point + npoint2 > npoint1 ) ) { - astError( AST__PTRNG, "astSetSubPoints(%s): Range of points in " - "output %s (%d to %d) lies outside the input %s extent " - "(0 to %d).", status, - astGetClass( point1 ), astGetClass( point2 ), point, - point + npoint2, astGetClass( point1 ), npoint1 ); - -/* Similarly check that the range of coordinates is valid. */ - } else if ( ( coord < 0 ) || ( coord + ncoord2 > ncoord1 ) ) { - astError( AST__CORNG, "astSetSubPoints(%s): Range of coordinates in " - "output %s (%d to %d) lies outside the input %s extent " - "(0 to %d).", status, - astGetClass( point1 ), astGetClass( point2 ), coord, - coord + ncoord2, astGetClass( point1 ), ncoord1 ); - -/* Obtain a pointer for the coordinate values associated with the first - PointSet (this will cause internal memory to be allocated if it is not - yet associated with coordinate values). */ - } else { - ptr1 = astGetPoints( point1 ); - -/* Allocate a temporary array to hold new pointer values. */ - ptr2 = (double **) astMalloc( sizeof( double * ) * (size_t) ncoord2 ); - -/* Initialise this pointer array to point at the required subset of coordinate - values. */ - if ( astOK ) { - for ( i = 0; i < ncoord2; i++ ) { - ptr2[ i ] = ptr1[ i + coord ] + point; - } - -/* Associate the second PointSet with this new pointer array. This will free - any internally allocated memory and replace any existing coordinate value - association. */ - astSetPoints( point2, ptr2 ); - } - -/* Free the temporary pointer arry. */ - ptr2 = (double **) astFree( (void * ) ptr2 ); - } - } -} - -static void ShowPoints( AstPointSet *this, int *status ) { -/* -*+ -* Name: -* astShowPoints - -* Purpose: -* Display the contents of a PointSet on standard output as a table -* in TOPCAT ASCII format. - -* Type: -* Protected virtual function. - -* Synopsis: -* #include "pointset.h" -* void astShowPoints( AstPointSet *this ) - -* Class Membership: -* PointSet method. - -* Description: -* This function displays the contents of the supplied PointSet on -* standard output as a table in TOPCAT "ascii" format. The first row -* is a comment that defines the column (axis) names as AXIS1, AXIS2, -* etc. Each subsequent row contains the axis values for one point. -* Bad axis values are represented by the string "null". - -* Parameters: -* this -* Pointer to the first PointSet. -*- -*/ - -/* Local Variables: */ - double **ptr; - int ic; - int ip; - int nc; - int np; - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Get pointers to the PointSet data, the number of axes and the number - of points. */ - ptr = astGetPoints( this ); - nc = astGetNcoord( this ); - np = astGetNpoint( this ); - -/* Check the pointers can be used safely. */ - if( astOK ) { - -/* Display the header. */ - printf("# "); - for( ic = 0; ic < nc; ic++ ) { - printf("Axis%d ", ic + 1 ); - } - printf("\n"); - -/* Display each row. */ - for( ip = 0; ip < np; ip++ ) { - for( ic = 0; ic < nc; ic++ ) { - if( ptr[ic][ip] != AST__BAD ) { - printf("%.*g ", AST__DBL_DIG, ptr[ic][ip] ); - } else { - printf("%*s ", -AST__DBL_DIG, "null"); - } - } - printf("\n"); - } - } -} - -static int TestAttrib( AstObject *this_object, const char *attrib, int *status ) { -/* -* Name: -* TestAttrib - -* Purpose: -* Test if a specified attribute value is set for a PointSet. - -* Type: -* Private function. - -* Synopsis: -* #include "pointset.h" -* int TestAttrib( AstObject *this, const char *attrib, int *status ) - -* Class Membership: -* PointSet member function (over-rides the astTestAttrib protected -* method inherited from the Object class). - -* Description: -* This function returns a boolean result (0 or 1) to indicate -* whether a value has been set for one of a PointSet's attributes. - -* Parameters: -* this -* Pointer to the PointSet. -* 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: */ - int result; /* Result value to return */ - -/* Initialise. */ - result = 0; - -/* Check the global error status. */ - if ( !astOK ) return result; - -/* Check the attribute name and test the appropriate attribute. */ - -/* Test if the name matches any of the read-only attributes of this - class. If it does, then return zero. */ - if ( !strcmp( attrib, "ncoord" ) || - !strcmp( attrib, "npoint" ) ) { - result = 0; - -/* If the attribute is still not recognised, pass it on to the parent - method for further interpretation. */ - } else { - result = (*parent_testattrib)( this_object, attrib, status ); - } - -/* Return the result, */ - return result; -} - -/* Functions which access class attributes. */ -/* ---------------------------------------- */ - -/* -*att+ -* Name: -* PointAccuracy - -* Purpose: -* The absolute accuracies for all points in the PointSet. - -* Type: -* Protected attribute. - -* Synopsis: -* Floating point. - -* Description: -* This attribute holds the absolute accuracy for each axis in the -* PointSet. It has a separate value for each axis. It is used when -* comparing two PointSets using the protected astEqual method inherited -* from the Object class. The default value for each axis is AST__BAD -* which causes the a default accuracy of each axis value to be calculated -* as 1.0E8*min( abs(axis value)*DBL_EPSILON, DBL_MIN ). - -* Applicability: -* PointSet -* All PointSets have this attribute. -*att- -*/ -MAKE_CLEAR(PointAccuracy,acc,AST__BAD) -MAKE_GET(PointAccuracy,double,AST__BAD,this->acc?this->acc[axis]:AST__BAD) -MAKE_SET(PointAccuracy,double,acc,((value!=AST__BAD)?fabs(value):AST__BAD),AST__BAD) -MAKE_TEST(PointAccuracy,(this->acc?this->acc[axis]!=AST__BAD:0)) - -/* Copy constructor. */ -/* ----------------- */ -static void Copy( const AstObject *objin, AstObject *objout, int *status ) { -/* -* Name: -* Copy - -* Purpose: -* Copy constructor for PointSet objects. - -* Type: -* Private function. - -* Synopsis: -* void Copy( const AstObject *objin, AstObject *objout, int *status ) - -* Description: -* This function implements the copy constructor for PointSet objects. - -* Parameters: -* objin -* Pointer to the object to be copied. -* objout -* Pointer to the object being constructed. -* status -* Pointer to the inherited status variable. - -* Returned Value: -* void - -* Notes: -* - This constructor makes a deep copy, including a copy of the coordinate -* values (if any) associated with the input PointSet. -*/ - -/* Local Variables: */ - AstPointSet *in; /* Pointer to input PointSet */ - AstPointSet *out; /* Pointer to output PointSet */ - int i; /* Loop counter for coordinates */ - int nval; /* Number of values to store */ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Obtain pointers to the input and output PointSets. */ - in = (AstPointSet *) objin; - out = (AstPointSet *) objout; - -/* For safety, first clear any references to the input coordinate values from - the output PointSet. */ - out->ptr = NULL; - out->values = NULL; - out->acc = NULL; - -/* Copy axis accuracies. */ - if( in->acc ){ - out->acc = astStore( NULL, in->acc, sizeof( double )*(size_t) in->ncoord ); - } - -/* If the input PointSet is associated with coordinate values, we must - allocate memory in the output PointSet to hold a copy of them. */ - if ( in->ptr ) { - -/* Determine the number of coordinate values to be stored and allocate memory - to hold them, storing a pointer to this memory in the output PointSet. */ - nval = in->npoint * in->ncoord; - out->values = (double *) astMalloc( sizeof( double ) * (size_t) nval ); - -/* If OK, also allocate memory for the array of pointers into this values - array, storing a pointer to this pointer array in the output PointSet. */ - if ( astOK ) { - out->ptr = (double **) astMalloc( sizeof( double * ) - * (size_t) in->ncoord ); - -/* If OK, initialise the new pointer array. */ - if ( astOK ) { - for ( i = 0; i < in->ncoord; i++ ) { - out->ptr[ i ] = out->values + ( i * in->npoint ); - } - -/* If we failed to allocate the pointer array, then free the values array. */ - } else { - out->values = (double *) astFree( (void *) out->values ); - } - } - -/* Copy the values for each coordinate from the input to the output. Use a - memory copy to avoid floating point errors if the data are - un-initialised. */ - if ( astOK ) { - for ( i = 0; i < in->ncoord; i++ ) { - (void) memcpy( (void *) out->ptr[ i ], - (const void *) in->ptr[ i ], - sizeof( double ) * (size_t) in->npoint ); - } - } - } -} - -/* Destructor. */ -/* ----------- */ -static void Delete( AstObject *obj, int *status ) { -/* -* Name: -* Delete - -* Purpose: -* Destructor for PointSet objects. - -* Type: -* Private function. - -* Synopsis: -* void Delete( AstObject *obj, int *status ) - -* Description: -* This function implements the destructor for PointSet objects. - -* Parameters: -* obj -* Pointer to the object to be deleted. -* status -* Pointer to the inherited status variable. - -* Returned Value: -* void - -* Notes: -* This function attempts to execute even if the global error status is -* set. -*/ - -/* Local Variables: */ - AstPointSet *this; /* Pointer to PointSet */ - -/* Obtain a pointer to the PointSet structure. */ - this = (AstPointSet *) obj; - -/* Free memory holding axis accuracies. */ - this->acc = astFree( this->acc ); - -/* Free any pointer array and associated coordinate values array, */ - this->ptr = (double **) astFree( (void *) this->ptr ); - this->values = (double *) astFree( (void *) this->values ); - -/* Clear the remaining PointSet variables. */ - this->npoint = 0; - this->ncoord = 0; -} - -/* Dump function. */ -/* -------------- */ -static void Dump( AstObject *this_object, AstChannel *channel, int *status ) { -/* -* Name: -* Dump - -* Purpose: -* Dump function for PointSet 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 PointSet class to an output Channel. - -* Parameters: -* this -* Pointer to the PointSet whose data are being written. -* channel -* Pointer to the Channel to which the data are being written. -* status -* Pointer to the inherited status variable. - -* Notes: -* - It is not recommended that PointSets containing large numbers -* of points be written out, as the coordinate data will be -* formatted as text and this will not be very efficient. -*/ - -/* Local Constants: */ -#define KEY_LEN 50 /* Maximum length of a keyword */ - -/* Local Variables: */ - AstPointSet *this; /* Pointer to the PointSet structure */ - char key[ KEY_LEN + 1 ]; /* Buffer for keywords */ - int coord; /* Loop counter for coordinates */ - int i; /* Counter for coordinate values */ - int ival; /* Integer value */ - int makeComment; /* Include a comment? */ - int point; /* Loop counter for points */ - int set; /* Attribute value set? */ - -/* Check the global error status. */ - if ( !astOK ) return; - -/* Obtain a pointer to the PointSet structure. */ - this = (AstPointSet *) this_object; - -/* Write out values representing the instance variables for the - PointSet class. Accompany these with appropriate comment strings, - possibly depending on the values being written.*/ - -/* In the case of attributes, we first use the appropriate (private) - Test... member function to see if they are set. If so, we then use - the (private) Get... function to obtain the value to be written - out. - - For attributes which are not set, we use the astGet... method to - obtain the value instead. This will supply a default value - (possibly provided by a derived class which over-rides this method) - which is more useful to a human reader as it corresponds to the - actual default attribute value. Since "set" will be zero, these - values are for information only and will not be read back. */ - -/* Npoint. */ -/* ------- */ - astWriteInt( channel, "Npoint", 1, 1, this->npoint, - "Number of points" ); - -/* Ncoord. */ -/* ------- */ - astWriteInt( channel, "Ncoord", 1, 1, this->ncoord, - "Number of coordinates per point" ); - -/* Axis Acuracies. */ -/* --------------- */ - for ( coord = 0; coord < this->ncoord; coord++ ) { - if( astTestPointAccuracy( this, coord ) ) { - (void) sprintf( key, "Acc%d", coord + 1 ); - astWriteDouble( channel, key, 1, 1, astGetPointAccuracy( this, coord ), - (coord == 0 ) ? "Axis accuracies..." : "" ); - } - } - -/* Coordinate data. */ -/* ---------------- */ -/* Write an "Empty" value to indicate whether or not the PointSet - contains data. */ - ival = ( this->ptr == NULL ); - set = ( ival != 0 ); - astWriteInt( channel, "Empty", set, 0, ival, - ival ? "PointSet is empty" : - "PointSet contains data" ); - -/* If it contains data, create a suitable keyword for each coordinate - value in turn. */ - if ( this->ptr ) { - makeComment = 1; - i = 0; - for ( point = 0; point < this->npoint; point++ ) { - for ( coord = 0; coord < this->ncoord; coord++ ) { - i++; - (void) sprintf( key, "X%d", i ); - -/* Write the value out if good. Only supply a comment for the first good value. */ - if( this->ptr[ coord ][ point ] != AST__BAD ) { - astWriteDouble( channel, key, 1, 1, this->ptr[ coord ][ point ], - ( makeComment ) ? "Coordinate values..." : "" ); - makeComment = 0; - } - } - } - } - -/* Undefine macros local to this function. */ -#undef KEY_LEN -} - -/* Standard class functions. */ -/* ========================= */ -/* Implement the astIsAPointSet and astCheckPointSet functions using the macros - defined for this purpose in the "object.h" header file. */ -astMAKE_ISA(PointSet,Object) -astMAKE_CHECK(PointSet) - -AstPointSet *astPointSet_( int npoint, int ncoord, const char *options, int *status, ...) { -/* -*+ -* Name: -* astPointSet - -* Purpose: -* Create a PointSet. - -* Type: -* Protected function. - -* Synopsis: -* #include "pointset.h" -* AstPointSet *astPointSet( int npoint, int ncoord, -* const char *options, ..., int *status ) - -* Class Membership: -* PointSet constructor. - -* Description: -* This function creates a new PointSet and optionally initialises its -* attributes. - -* Parameters: -* npoint -* The number of points to be stored in the PointSet (must be at -* least 1). -* ncoord -* The number of coordinate values associated with each point -* (must be at least 1). -* options -* Pointer to a null terminated string containing an optional -* comma-separated list of attribute assignments to be used for -* initialising the new PointSet. The syntax used is the same as -* for the astSet method and may include "printf" format -* specifiers identified by "%" symbols in the normal way. -* status -* Pointer to the inherited status variable. -* ... -* If the "options" string contains "%" format specifiers, then -* an optional list of arguments may follow it in order to -* supply values to be substituted for these specifiers. The -* rules for supplying these are identical to those for the -* astSet method (and for the C "printf" function). - -* Returned Value: -* A pointer to the new 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. -*- -*/ - -/* Local Variables: */ - astDECLARE_GLOBALS /* Pointer to thread-specific global data */ - AstPointSet *new; /* Pointer to new PointSet */ - 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 PointSet, allocating memory and initialising the - virtual function table as well if necessary. */ - new = astInitPointSet( NULL, sizeof( AstPointSet ), !class_init, - &class_vtab, "PointSet", npoint, ncoord ); - -/* 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 - PointSet'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 PointSet. */ - return new; -} - -AstPointSet *astPointSetId_( int npoint, int ncoord, - const char *options, int *status, ...) { -/* -* Name: -* astPointSetId_ - -* Purpose: -* Create a PointSet. - -* Type: -* Private function. - -* Synopsis: -* #include "pointset.h" -* AstPointSet *astPointSetId_( int npoint, int ncoord, -* const char *options, ... ) - -* Class Membership: -* PointSet constructor. - -* Description: -* This function implements the external (public) interface to the -* astPointSet constructor function. It returns an ID value -* (instead of a true C pointer) to external users, and must be -* provided because astPointSet_ 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 astPointSet_ 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 astPointSet_. - -* Returned Value: -* The ID value associated with the new PointSet. -*/ - -/* Local Variables: */ - astDECLARE_GLOBALS /* Pointer to thread-specific global data */ - AstPointSet *new; /* Pointer to new PointSet */ - va_list args; /* Variable argument list */ - -/* Check the global status. */ - if ( !astOK ) return NULL; - -/* Get a pointer to the thread specific global data structure. */ - astGET_GLOBALS(NULL); - -/* Initialise the PointSet, allocating memory and initialising the - virtual function table as well if necessary. */ - new = astInitPointSet( NULL, sizeof( AstPointSet ), !class_init, - &class_vtab, "PointSet", npoint, ncoord ); - -/* 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 - PointSet'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 an ID value for the new PointSet. */ - return astMakeId( new ); -} - -AstPointSet *astInitPointSet_( void *mem, size_t size, int init, - AstPointSetVtab *vtab, const char *name, - int npoint, int ncoord, int *status ) { -/* -*+ -* Name: -* astInitPointSet - -* Purpose: -* Initialise a PointSet. - -* Type: -* Protected function. - -* Synopsis: -* #include "pointset.h" -* AstPointSet *astInitPointSet( void *mem, size_t size, int init, -* AstPointSetVtab *vtab, const char *name, -* int npoint, int ncoord ) - -* Class Membership: -* PointSet initialiser. - -* Description: -* This function is provided for use by class implementations to initialise -* a new PointSet object. It allocates memory (if necessary) to accommodate -* the PointSet plus any additional data associated with the derived class. -* It then initialises a PointSet 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 PointSet at the start of the memory passed via the -* "vtab" parameter. - -* Parameters: -* mem -* A pointer to the memory in which the PointSet is to be created. This -* must be of sufficient size to accommodate the PointSet data -* (sizeof(PointSet)) 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 PointSet (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 PointSet -* structure, so a valid value must be supplied even if not required for -* allocating memory. -* init -* A logical flag indicating if the PointSet'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 PointSet. -* name -* Pointer to a constant null-terminated character string which contains -* the name of the class to which the new object belongs (it is this -* pointer value that will subsequently be returned by the Object -* astClass function). -* npoint -* The number of points in the PointSet (must be at least 1). -* ncoord -* The number of coordinate values associated with each point (must be -* at least 1). - -* Returned Value: -* A pointer to the 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. -*- -*/ - -/* Local Variables: */ - AstPointSet *new; /* Pointer to new PointSet */ - -/* Check the global status. */ - if ( !astOK ) return NULL; - -/* If necessary, initialise the virtual function table. */ - if ( init ) astInitPointSetVtab( vtab, name ); - -/* Initialise. */ - new = NULL; - -/* Check the initialisation values for validity, reporting an error if - necessary. */ - if ( npoint < 1 ) { - astError( AST__NPTIN, "astInitPointSet(%s): Number of points (%d) is " - "not valid.", status, name, npoint ); - } else if ( ncoord < 1 ) { - astError( AST__NCOIN, "astInitPointSet(%s): Number of coordinates per " - "point (%d) is not valid.", status, name, ncoord ); - } - -/* Initialise an Object structure (the parent class) as the first component - within the PointSet structure, allocating memory if necessary. */ - new = (AstPointSet *) astInitObject( mem, size, 0, - (AstObjectVtab *) vtab, name ); - - if ( astOK ) { - -/* Initialise the PointSet data. */ -/* ----------------------------- */ -/* Store the number of points and number of coordinate values per point. */ - new->npoint = npoint; - new->ncoord = ncoord; - -/* Initialise pointers to the pointer array and associated coordinate - values array. */ - new->ptr = NULL; - new->values = NULL; - new->acc = NULL; - -/* If an error occurred, clean up by deleting the new object. */ - if ( !astOK ) new = astDelete( new ); - } - -/* Return a pointer to the new object. */ - return new; -} - -AstPointSet *astLoadPointSet_( void *mem, size_t size, - AstPointSetVtab *vtab, const char *name, - AstChannel *channel, int *status ) { -/* -*+ -* Name: -* astLoadPointSet - -* Purpose: -* Load a PointSet. - -* Type: -* Protected function. - -* Synopsis: -* #include "pointset.h" -* AstPointSet *astLoadPointSet( void *mem, size_t size, -* AstPointSetVtab *vtab, const char *name, -* AstChannel *channel ) - -* Class Membership: -* PointSet loader. - -* Description: -* This function is provided to load a new PointSet 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 -* PointSet structure in this memory, using data read from the -* input Channel. - -* Parameters: -* mem -* A pointer to the memory into which the PointSet is to be -* loaded. This must be of sufficient size to accommodate the -* PointSet data (sizeof(PointSet)) 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 PointSet (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 PointSet 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(AstPointSet) is used instead. -* vtab -* Pointer to the start of the virtual function table to be -* associated with the new PointSet. If this is NULL, a pointer -* to the (static) virtual function table for the PointSet 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 "PointSet" is used instead. - -* Returned Value: -* A pointer to the 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. -*- -*/ - -/* Local Constants: */ - astDECLARE_GLOBALS /* Pointer to thread-specific global data */ -#define KEY_LEN 50 /* Maximum length of a keyword */ - -/* Local Variables: */ - AstPointSet *new; /* Pointer to the new PointSet */ - char key[ KEY_LEN + 1 ]; /* Buffer for keywords */ - double acc; /* Accuracy value */ - int coord; /* Loop counter for coordinates */ - int empty; /* PointSet empty? */ - int i; /* Counter for coordinate values */ - int point; /* Loop counter for points */ - -/* Get a pointer to the thread specific global data structure. */ - astGET_GLOBALS(channel); - -/* Initialise. */ - new = NULL; - -/* Check the global error status. */ - if ( !astOK ) return new; - -/* If a NULL virtual function table has been supplied, then this is - the first loader to be invoked for this PointSet. In this case the - PointSet belongs to this class, so supply appropriate values to be - passed to the parent class loader (and its parent, etc.). */ - if ( !vtab ) { - size = sizeof( AstPointSet ); - vtab = &class_vtab; - name = "PointSet"; - -/* If required, initialise the virtual function table for this class. */ - if ( !class_init ) { - astInitPointSetVtab( 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 PointSet. */ - new = astLoadObject( mem, size, (AstObjectVtab *) vtab, name, - channel ); - - if ( astOK ) { - -/* Initialise the PointSet's data pointers. */ - new->ptr = NULL; - new->values = NULL; - -/* Read input data. */ -/* ================ */ -/* Request the input Channel to read all the input data appropriate to - this class into the internal "values list". */ - astReadClassData( channel, "PointSet" ); - -/* Now read each individual data item from this list and use it to - initialise the appropriate instance variable(s) for this class. */ - -/* In the case of attributes, we first read the "raw" input value, - supplying the "unset" value as the default. If a "set" value is - obtained, we then use the appropriate (private) Set... member - function to validate and set the value properly. */ - -/* Npoint. */ -/* ------- */ - new->npoint = astReadInt( channel, "npoint", 1 ); - if ( new->npoint < 1 ) new->npoint = 1; - -/* Ncoord. */ -/* ------- */ - new->ncoord = astReadInt( channel, "ncoord", 1 ); - if ( new->ncoord < 1 ) new->ncoord = 1; - -/* Axis Acuracies. */ -/* --------------- */ - new->acc = NULL; - for ( coord = 0; coord < new->ncoord; coord++ ) { - (void) sprintf( key, "acc%d", coord + 1 ); - acc = astReadDouble( channel, key, AST__BAD ); - if( !new->acc && acc != AST__BAD ) { - new->acc = astMalloc( sizeof( double )*(size_t) new->ncoord ); - if( new->acc ) { - for( i = 0; i < coord - 1; i++ ) new->acc[ i ] = AST__BAD; - } - } - if( new->acc ) new->acc[ coord ] = acc; - } - -/* Coordinate data. */ -/* ---------------- */ -/* Read a value for the "Empty" keyword to see whether the PointSet - contains data. */ - empty = astReadInt( channel, "empty", 0 ); - -/* If it does, allocate memory to hold the coordinate data and - pointers. */ - if ( astOK && !empty ) { - new->ptr = astMalloc( sizeof( double * ) * (size_t) new->ncoord ); - new->values = astMalloc( sizeof( double ) * - (size_t) ( new->npoint * new->ncoord ) ); - if ( astOK ) { - -/* Initialise the array of pointers into the main data array. */ - for ( coord = 0; coord < new->ncoord; coord++ ) { - new->ptr[ coord ] = new->values + ( coord * new->npoint ); - } - -/* Create a keyword for each coordinate value to be read. */ - i = 0; - for ( point = 0; point < new->npoint; point++ ) { - for ( coord = 0; coord < new->ncoord; coord++ ) { - i++; - (void) sprintf( key, "x%d", i ); - -/* Read and assign the values. */ - new->ptr[ coord ][ point ] = - astReadDouble( channel, key, AST__BAD ); - } - } - } - -/* If an error occurred, clean up by freeing the memory allocated - above, thus emptying the PointSet. */ - if ( !astOK ) { - new->ptr = astFree( new->ptr ); - new->values = astFree( new->values ); - } - } - -/* If an error occurred, clean up by deleting the new PointSet. */ - if ( !astOK ) new = astDelete( new ); - } - -/* Return the new PointSet pointer. */ - return new; - -/* Undefine macros local to this function. */ -#undef KEY_LEN -} - -/* Virtual function interfaces. */ -/* ============================ */ -/* These provide the external interface to the virtual functions defined by - this class. Each simply checks the global error status and then locates and - executes the appropriate member function, using the function pointer stored - in the object's virtual function table (this pointer is located using the - astMEMBER macro defined in "object.h"). - - Note that the member function may not be the one defined here, as it may - have been over-ridden by a derived class. However, it should still have the - same interface. */ -int astGetNpoint_( const AstPointSet *this, int *status ) { - if ( !astOK ) return 0; - return (**astMEMBER(this,PointSet,GetNpoint))( this, status ); -} -int astGetNcoord_( const AstPointSet *this, int *status ) { - if ( !astOK ) return 0; - return (**astMEMBER(this,PointSet,GetNcoord))( this, status ); -} -double **astGetPoints_( AstPointSet *this, int *status ) { - if ( !astOK ) return NULL; - return (**astMEMBER(this,PointSet,GetPoints))( this, status ); -} -void astPermPoints_( AstPointSet *this, int forward, const int perm[], int *status ) { - if ( !astOK ) return; - (**astMEMBER(this,PointSet,PermPoints))( this, forward, perm, status ); -} -void astSetPoints_( AstPointSet *this, double **ptr, int *status ) { - if ( !astOK ) return; - (**astMEMBER(this,PointSet,SetPoints))( this, ptr, status ); -} -void astSetNpoint_( AstPointSet *this, int npoint, int *status ) { - if ( !astOK ) return; - (**astMEMBER(this,PointSet,SetNpoint))( this, npoint, status ); -} -void astSetSubPoints_( AstPointSet *point1, int point, int coord, - AstPointSet *point2, int *status ) { - if ( !astOK ) return; - (**astMEMBER(point1,PointSet,SetSubPoints))( point1, point, coord, point2, status ); -} -AstPointSet *astAppendPoints_( AstPointSet *this, AstPointSet *that, int *status ) { - if ( !astOK ) return NULL; - return (**astMEMBER(this,PointSet,AppendPoints))( this, that, status ); -} -void astBndPoints_( AstPointSet *this, double *lbnd, double *ubnd, int *status ) { - if ( !astOK ) return; - (**astMEMBER(this,PointSet,BndPoints))( this, lbnd, ubnd, status ); -} - -int astReplaceNaN_( AstPointSet *this, int *status ) { - if ( !astOK ) return 0; - return (**astMEMBER(this,PointSet,ReplaceNaN))( this, status ); -} -void astShowPoints_( AstPointSet *this, int *status ) { - if ( !astOK ) return; - (**astMEMBER(this,PointSet,ShowPoints))( this, status ); -} - - - - - |