WCSLIB 7.11

tab.h
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1/*============================================================================
2 WCSLIB 7.11 - an implementation of the FITS WCS standard.
3 Copyright (C) 1995-2022, Mark Calabretta
4
5 This file is part of WCSLIB.
6
7 WCSLIB is free software: you can redistribute it and/or modify it under the
8 terms of the GNU Lesser General Public License as published by the Free
9 Software Foundation, either version 3 of the License, or (at your option)
10 any later version.
11
12 WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
15 more details.
16
17 You should have received a copy of the GNU Lesser General Public License
18 along with WCSLIB. If not, see http://www.gnu.org/licenses.
19
20 Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
21 http://www.atnf.csiro.au/people/Mark.Calabretta
22 $Id: tab.h,v 7.11 2022/04/26 06:13:52 mcalabre Exp $
23*=============================================================================
24*
25* WCSLIB 7.11 - C routines that implement the FITS World Coordinate System
26* (WCS) standard. Refer to the README file provided with WCSLIB for an
27* overview of the library.
28*
29*
30* Summary of the tab routines
31* ---------------------------
32* Routines in this suite implement the part of the FITS World Coordinate
33* System (WCS) standard that deals with tabular coordinates, i.e. coordinates
34* that are defined via a lookup table, as described in
35*
36= "Representations of world coordinates in FITS",
37= Greisen, E.W., & Calabretta, M.R. 2002, A&A, 395, 1061 (WCS Paper I)
38=
39= "Representations of spectral coordinates in FITS",
40= Greisen, E.W., Calabretta, M.R., Valdes, F.G., & Allen, S.L.
41= 2006, A&A, 446, 747 (WCS Paper III)
42*
43* These routines define methods to be used for computing tabular world
44* coordinates from intermediate world coordinates (a linear transformation
45* of image pixel coordinates), and vice versa. They are based on the tabprm
46* struct which contains all information needed for the computations. The
47* struct contains some members that must be set by the user, and others that
48* are maintained by these routines, somewhat like a C++ class but with no
49* encapsulation.
50*
51* tabini(), tabmem(), tabcpy(), and tabfree() are provided to manage the
52* tabprm struct, tabsize() computes its total size including allocated memory,
53* and tabprt() prints its contents.
54*
55* tabperr() prints the error message(s) (if any) stored in a tabprm struct.
56*
57* A setup routine, tabset(), computes intermediate values in the tabprm struct
58* from parameters in it that were supplied by the user. The struct always
59* needs to be set up by tabset() but it need not be called explicitly - refer
60* to the explanation of tabprm::flag.
61*
62* tabx2s() and tabs2x() implement the WCS tabular coordinate transformations.
63*
64* Accuracy:
65* ---------
66* No warranty is given for the accuracy of these routines (refer to the
67* copyright notice); intending users must satisfy for themselves their
68* adequacy for the intended purpose. However, closure effectively to within
69* double precision rounding error was demonstrated by test routine ttab.c
70* which accompanies this software.
71*
72*
73* tabini() - Default constructor for the tabprm struct
74* ----------------------------------------------------
75* tabini() allocates memory for arrays in a tabprm struct and sets all members
76* of the struct to default values.
77*
78* PLEASE NOTE: every tabprm struct should be initialized by tabini(), possibly
79* repeatedly. On the first invokation, and only the first invokation, the
80* flag member of the tabprm struct must be set to -1 to initialize memory
81* management, regardless of whether tabini() will actually be used to allocate
82* memory.
83*
84* Given:
85* alloc int If true, allocate memory unconditionally for arrays in
86* the tabprm struct.
87*
88* If false, it is assumed that pointers to these arrays
89* have been set by the user except if they are null
90* pointers in which case memory will be allocated for
91* them regardless. (In other words, setting alloc true
92* saves having to initalize these pointers to zero.)
93*
94* M int The number of tabular coordinate axes.
95*
96* K const int[]
97* Vector of length M whose elements (K_1, K_2,... K_M)
98* record the lengths of the axes of the coordinate array
99* and of each indexing vector. M and K[] are used to
100* determine the length of the various tabprm arrays and
101* therefore the amount of memory to allocate for them.
102* Their values are copied into the tabprm struct.
103*
104* It is permissible to set K (i.e. the address of the
105* array) to zero which has the same effect as setting
106* each element of K[] to zero. In this case no memory
107* will be allocated for the index vectors or coordinate
108* array in the tabprm struct. These together with the
109* K vector must be set separately before calling
110* tabset().
111*
112* Given and returned:
113* tab struct tabprm*
114* Tabular transformation parameters. Note that, in
115* order to initialize memory management tabprm::flag
116* should be set to -1 when tab is initialized for the
117* first time (memory leaks may result if it had already
118* been initialized).
119*
120* Function return value:
121* int Status return value:
122* 0: Success.
123* 1: Null tabprm pointer passed.
124* 2: Memory allocation failed.
125* 3: Invalid tabular parameters.
126*
127* For returns > 1, a detailed error message is set in
128* tabprm::err if enabled, see wcserr_enable().
129*
130*
131* tabmem() - Acquire tabular memory
132* ---------------------------------
133* tabmem() takes control of memory allocated by the user for arrays in the
134* tabprm struct.
135*
136* Given and returned:
137* tab struct tabprm*
138* Tabular transformation parameters.
139*
140* Function return value:
141* int Status return value:
142* 0: Success.
143* 1: Null tabprm pointer passed.
144* 2: Memory allocation failed.
145*
146* For returns > 1, a detailed error message is set in
147* tabprm::err if enabled, see wcserr_enable().
148*
149*
150* tabcpy() - Copy routine for the tabprm struct
151* ---------------------------------------------
152* tabcpy() does a deep copy of one tabprm struct to another, using tabini() to
153* allocate memory for its arrays if required. Only the "information to be
154* provided" part of the struct is copied; a call to tabset() is required to
155* set up the remainder.
156*
157* Given:
158* alloc int If true, allocate memory unconditionally for arrays in
159* the tabprm struct.
160*
161* If false, it is assumed that pointers to these arrays
162* have been set by the user except if they are null
163* pointers in which case memory will be allocated for
164* them regardless. (In other words, setting alloc true
165* saves having to initalize these pointers to zero.)
166*
167* tabsrc const struct tabprm*
168* Struct to copy from.
169*
170* Given and returned:
171* tabdst struct tabprm*
172* Struct to copy to. tabprm::flag should be set to -1
173* if tabdst was not previously initialized (memory leaks
174* may result if it was previously initialized).
175*
176* Function return value:
177* int Status return value:
178* 0: Success.
179* 1: Null tabprm pointer passed.
180* 2: Memory allocation failed.
181*
182* For returns > 1, a detailed error message is set in
183* tabprm::err (associated with tabdst) if enabled, see
184* wcserr_enable().
185*
186*
187* tabcmp() - Compare two tabprm structs for equality
188* --------------------------------------------------
189* tabcmp() compares two tabprm structs for equality.
190*
191* Given:
192* cmp int A bit field controlling the strictness of the
193* comparison. At present, this value must always be 0,
194* indicating a strict comparison. In the future, other
195* options may be added.
196*
197* tol double Tolerance for comparison of floating-point values.
198* For example, for tol == 1e-6, all floating-point
199* values in the structs must be equal to the first 6
200* decimal places. A value of 0 implies exact equality.
201*
202* tab1 const struct tabprm*
203* The first tabprm struct to compare.
204*
205* tab2 const struct tabprm*
206* The second tabprm struct to compare.
207*
208* Returned:
209* equal int* Non-zero when the given structs are equal.
210*
211* Function return value:
212* int Status return value:
213* 0: Success.
214* 1: Null pointer passed.
215*
216*
217* tabfree() - Destructor for the tabprm struct
218* --------------------------------------------
219* tabfree() frees memory allocated for the tabprm arrays by tabini().
220* tabini() records the memory it allocates and tabfree() will only attempt to
221* free this.
222*
223* PLEASE NOTE: tabfree() must not be invoked on a tabprm struct that was not
224* initialized by tabini().
225*
226* Returned:
227* tab struct tabprm*
228* Coordinate transformation parameters.
229*
230* Function return value:
231* int Status return value:
232* 0: Success.
233* 1: Null tabprm pointer passed.
234*
235*
236* tabsize() - Compute the size of a tabprm struct
237* -----------------------------------------------
238* tabsize() computes the full size of a tabprm struct, including allocated
239* memory.
240*
241* Given:
242* tab const struct tabprm*
243* Tabular transformation parameters.
244*
245* If NULL, the base size of the struct and the allocated
246* size are both set to zero.
247*
248* Returned:
249* sizes int[2] The first element is the base size of the struct as
250* returned by sizeof(struct tabprm). The second element
251* is the total allocated size, in bytes, assuming that
252* the allocation was done by tabini(). This figure
253* includes memory allocated for the constituent struct,
254* tabprm::err.
255*
256* It is not an error for the struct not to have been set
257* up via tabset(), which normally results in additional
258* memory allocation.
259*
260* Function return value:
261* int Status return value:
262* 0: Success.
263*
264*
265* tabprt() - Print routine for the tabprm struct
266* ----------------------------------------------
267* tabprt() prints the contents of a tabprm struct using wcsprintf(). Mainly
268* intended for diagnostic purposes.
269*
270* Given:
271* tab const struct tabprm*
272* Tabular transformation parameters.
273*
274* Function return value:
275* int Status return value:
276* 0: Success.
277* 1: Null tabprm pointer passed.
278*
279*
280* tabperr() - Print error messages from a tabprm struct
281* -----------------------------------------------------
282* tabperr() prints the error message(s) (if any) stored in a tabprm struct.
283* If there are no errors then nothing is printed. It uses wcserr_prt(), q.v.
284*
285* Given:
286* tab const struct tabprm*
287* Tabular transformation parameters.
288*
289* prefix const char *
290* If non-NULL, each output line will be prefixed with
291* this string.
292*
293* Function return value:
294* int Status return value:
295* 0: Success.
296* 1: Null tabprm pointer passed.
297*
298*
299* tabset() - Setup routine for the tabprm struct
300* -----------------------------------------------
301* tabset() allocates memory for work arrays in the tabprm struct and sets up
302* the struct according to information supplied within it.
303*
304* Note that this routine need not be called directly; it will be invoked by
305* tabx2s() and tabs2x() if tabprm::flag is anything other than a predefined
306* magic value.
307*
308* Given and returned:
309* tab struct tabprm*
310* Tabular transformation parameters.
311*
312* Function return value:
313* int Status return value:
314* 0: Success.
315* 1: Null tabprm pointer passed.
316* 3: Invalid tabular parameters.
317*
318* For returns > 1, a detailed error message is set in
319* tabprm::err if enabled, see wcserr_enable().
320*
321*
322* tabx2s() - Pixel-to-world transformation
323* ----------------------------------------
324* tabx2s() transforms intermediate world coordinates to world coordinates
325* using coordinate lookup.
326*
327* Given and returned:
328* tab struct tabprm*
329* Tabular transformation parameters.
330*
331* Given:
332* ncoord,
333* nelem int The number of coordinates, each of vector length
334* nelem.
335*
336* x const double[ncoord][nelem]
337* Array of intermediate world coordinates, SI units.
338*
339* Returned:
340* world double[ncoord][nelem]
341* Array of world coordinates, in SI units.
342*
343* stat int[ncoord]
344* Status return value status for each coordinate:
345* 0: Success.
346* 1: Invalid intermediate world coordinate.
347*
348* Function return value:
349* int Status return value:
350* 0: Success.
351* 1: Null tabprm pointer passed.
352* 3: Invalid tabular parameters.
353* 4: One or more of the x coordinates were invalid,
354* as indicated by the stat vector.
355*
356* For returns > 1, a detailed error message is set in
357* tabprm::err if enabled, see wcserr_enable().
358*
359*
360* tabs2x() - World-to-pixel transformation
361* ----------------------------------------
362* tabs2x() transforms world coordinates to intermediate world coordinates.
363*
364* Given and returned:
365* tab struct tabprm*
366* Tabular transformation parameters.
367*
368* Given:
369* ncoord,
370* nelem int The number of coordinates, each of vector length
371* nelem.
372* world const double[ncoord][nelem]
373* Array of world coordinates, in SI units.
374*
375* Returned:
376* x double[ncoord][nelem]
377* Array of intermediate world coordinates, SI units.
378* stat int[ncoord]
379* Status return value status for each vector element:
380* 0: Success.
381* 1: Invalid world coordinate.
382*
383* Function return value:
384* int Status return value:
385* 0: Success.
386* 1: Null tabprm pointer passed.
387* 3: Invalid tabular parameters.
388* 5: One or more of the world coordinates were
389* invalid, as indicated by the stat vector.
390*
391* For returns > 1, a detailed error message is set in
392* tabprm::err if enabled, see wcserr_enable().
393*
394*
395* tabprm struct - Tabular transformation parameters
396* -------------------------------------------------
397* The tabprm struct contains information required to transform tabular
398* coordinates. It consists of certain members that must be set by the user
399* ("given") and others that are set by the WCSLIB routines ("returned"). Some
400* of the latter are supplied for informational purposes while others are for
401* internal use only.
402*
403* int flag
404* (Given and returned) This flag must be set to zero whenever any of the
405* following tabprm structure members are set or changed:
406*
407* - tabprm::M (q.v., not normally set by the user),
408* - tabprm::K (q.v., not normally set by the user),
409* - tabprm::map,
410* - tabprm::crval,
411* - tabprm::index,
412* - tabprm::coord.
413*
414* This signals the initialization routine, tabset(), to recompute the
415* returned members of the tabprm struct. tabset() will reset flag to
416* indicate that this has been done.
417*
418* PLEASE NOTE: flag should be set to -1 when tabini() is called for the
419* first time for a particular tabprm struct in order to initialize memory
420* management. It must ONLY be used on the first initialization otherwise
421* memory leaks may result.
422*
423* int M
424* (Given or returned) Number of tabular coordinate axes.
425*
426* If tabini() is used to initialize the tabprm struct (as would normally
427* be the case) then it will set M from the value passed to it as a
428* function argument. The user should not subsequently modify it.
429*
430* int *K
431* (Given or returned) Pointer to the first element of a vector of length
432* tabprm::M whose elements (K_1, K_2,... K_M) record the lengths of the
433* axes of the coordinate array and of each indexing vector.
434*
435* If tabini() is used to initialize the tabprm struct (as would normally
436* be the case) then it will set K from the array passed to it as a
437* function argument. The user should not subsequently modify it.
438*
439* int *map
440* (Given) Pointer to the first element of a vector of length tabprm::M
441* that defines the association between axis m in the M-dimensional
442* coordinate array (1 <= m <= M) and the indices of the intermediate world
443* coordinate and world coordinate arrays, x[] and world[], in the argument
444* lists for tabx2s() and tabs2x().
445*
446* When x[] and world[] contain the full complement of coordinate elements
447* in image-order, as will usually be the case, then map[m-1] == i-1 for
448* axis i in the N-dimensional image (1 <= i <= N). In terms of the FITS
449* keywords
450*
451* map[PVi_3a - 1] == i - 1.
452*
453* However, a different association may result if x[], for example, only
454* contains a (relevant) subset of intermediate world coordinate elements.
455* For example, if M == 1 for an image with N > 1, it is possible to fill
456* x[] with the relevant coordinate element with nelem set to 1. In this
457* case map[0] = 0 regardless of the value of i.
458*
459* double *crval
460* (Given) Pointer to the first element of a vector of length tabprm::M
461* whose elements contain the index value for the reference pixel for each
462* of the tabular coordinate axes.
463*
464* double **index
465* (Given) Pointer to the first element of a vector of length tabprm::M of
466* pointers to vectors of lengths (K_1, K_2,... K_M) of 0-relative indexes
467* (see tabprm::K).
468*
469* The address of any or all of these index vectors may be set to zero,
470* i.e.
471*
472= index[m] == 0;
473*
474* this is interpreted as default indexing, i.e.
475*
476= index[m][k] = k;
477*
478* double *coord
479* (Given) Pointer to the first element of the tabular coordinate array,
480* treated as though it were defined as
481*
482= double coord[K_M]...[K_2][K_1][M];
483*
484* (see tabprm::K) i.e. with the M dimension varying fastest so that the
485* M elements of a coordinate vector are stored contiguously in memory.
486*
487* int nc
488* (Returned) Total number of coordinate vectors in the coordinate array
489* being the product K_1 * K_2 * ... * K_M (see tabprm::K).
490*
491* int padding
492* (An unused variable inserted for alignment purposes only.)
493*
494* int *sense
495* (Returned) Pointer to the first element of a vector of length tabprm::M
496* whose elements indicate whether the corresponding indexing vector is
497* monotonic increasing (+1), or decreasing (-1).
498*
499* int *p0
500* (Returned) Pointer to the first element of a vector of length tabprm::M
501* of interpolated indices into the coordinate array such that Upsilon_m,
502* as defined in Paper III, is equal to (p0[m] + 1) + tabprm::delta[m].
503*
504* double *delta
505* (Returned) Pointer to the first element of a vector of length tabprm::M
506* of interpolated indices into the coordinate array such that Upsilon_m,
507* as defined in Paper III, is equal to (tabprm::p0[m] + 1) + delta[m].
508*
509* double *extrema
510* (Returned) Pointer to the first element of an array that records the
511* minimum and maximum value of each element of the coordinate vector in
512* each row of the coordinate array, treated as though it were defined as
513*
514= double extrema[K_M]...[K_2][2][M]
515*
516* (see tabprm::K). The minimum is recorded in the first element of the
517* compressed K_1 dimension, then the maximum. This array is used by the
518* inverse table lookup function, tabs2x(), to speed up table searches.
519*
520* struct wcserr *err
521* (Returned) If enabled, when an error status is returned, this struct
522* contains detailed information about the error, see wcserr_enable().
523*
524* int m_flag
525* (For internal use only.)
526* int m_M
527* (For internal use only.)
528* int m_N
529* (For internal use only.)
530* int set_M
531* (For internal use only.)
532* int m_K
533* (For internal use only.)
534* int m_map
535* (For internal use only.)
536* int m_crval
537* (For internal use only.)
538* int m_index
539* (For internal use only.)
540* int m_indxs
541* (For internal use only.)
542* int m_coord
543* (For internal use only.)
544*
545*
546* Global variable: const char *tab_errmsg[] - Status return messages
547* ------------------------------------------------------------------
548* Error messages to match the status value returned from each function.
549*
550*===========================================================================*/
551
552#ifndef WCSLIB_TAB
553#define WCSLIB_TAB
554
555#ifdef __cplusplus
556 extern "C" {
557#endif
558
559
560 extern const char *tab_errmsg[];
561
562 enum tab_errmsg_enum {
563 TABERR_SUCCESS = 0, // Success.
564 TABERR_NULL_POINTER = 1, // Null tabprm pointer passed.
565 TABERR_MEMORY = 2, // Memory allocation failed.
566 TABERR_BAD_PARAMS = 3, // Invalid tabular parameters.
567 TABERR_BAD_X = 4, // One or more of the x coordinates were
568 // invalid.
569 TABERR_BAD_WORLD = 5 // One or more of the world coordinates were
570 // invalid.
571};
572
573 struct tabprm {
574 // Initialization flag (see the prologue above).
575 //--------------------------------------------------------------------------
576 int flag; // Set to zero to force initialization.
577
578 // Parameters to be provided (see the prologue above).
579 //--------------------------------------------------------------------------
580 int M; // Number of tabular coordinate axes.
581 int *K; // Vector of length M whose elements
582 // (K_1, K_2,... K_M) record the lengths of
583 // the axes of the coordinate array and of
584 // each indexing vector.
585 int *map; // Vector of length M usually such that
586 // map[m-1] == i-1 for coordinate array
587 // axis m and image axis i (see above).
588 double *crval; // Vector of length M containing the index
589 // value for the reference pixel for each
590 // of the tabular coordinate axes.
591 double **index; // Vector of pointers to M indexing vectors
592 // of lengths (K_1, K_2,... K_M).
593 double *coord; // (1+M)-dimensional tabular coordinate
594 // array (see above).
595
596 // Information derived from the parameters supplied.
597 //--------------------------------------------------------------------------
598 int nc; // Number of coordinate vectors (of length
599 // M) in the coordinate array.
600 int padding; // (Dummy inserted for alignment purposes.)
601 int *sense; // Vector of M flags that indicate whether
602 // the Mth indexing vector is monotonic
603 // increasing, or else decreasing.
604 int *p0; // Vector of M indices.
605 double *delta; // Vector of M increments.
606 double *extrema; // (1+M)-dimensional array of coordinate
607 // extrema.
608
609 // Error handling
610 //--------------------------------------------------------------------------
611 struct wcserr *err;
612
613 // Private - the remainder are for memory management.
614 //--------------------------------------------------------------------------
615 int m_flag, m_M, m_N;
616 int set_M;
617 int *m_K, *m_map;
618 double *m_crval, **m_index, **m_indxs, *m_coord;
619};
620
621// Size of the tabprm struct in int units, used by the Fortran wrappers.
622#define TABLEN (sizeof(struct tabprm)/sizeof(int))
623
624
625 int tabini(int alloc, int M, const int K[], struct tabprm *tab);
626
627 int tabmem(struct tabprm *tab);
628
629 int tabcpy(int alloc, const struct tabprm *tabsrc, struct tabprm *tabdst);
630
631 int tabcmp(int cmp, double tol, const struct tabprm *tab1,
632 const struct tabprm *tab2, int *equal);
633
634 int tabfree(struct tabprm *tab);
635
636 int tabsize(const struct tabprm *tab, int size[2]);
637
638 int tabprt(const struct tabprm *tab);
639
640 int tabperr(const struct tabprm *tab, const char *prefix);
641
642 int tabset(struct tabprm *tab);
643
644 int tabx2s(struct tabprm *tab, int ncoord, int nelem, const double x[],
645 double world[], int stat[]);
646
647 int tabs2x(struct tabprm *tab, int ncoord, int nelem, const double world[],
648 double x[], int stat[]);
649
650
651// Deprecated.
652#define tabini_errmsg tab_errmsg
653#define tabcpy_errmsg tab_errmsg
654#define tabfree_errmsg tab_errmsg
655#define tabprt_errmsg tab_errmsg
656#define tabset_errmsg tab_errmsg
657#define tabx2s_errmsg tab_errmsg
658#define tabs2x_errmsg tab_errmsg
659
660#ifdef __cplusplus
661}
662#endif
663
664#endif // WCSLIB_TAB
tabprm
Tabular transformation parameters.
Definition: tab.h:573
tabprm::padding
int padding
Definition: tab.h:600
tabprm::m_index
double ** m_index
Definition: tab.h:618
tabprm::crval
double * crval
Definition: tab.h:588
tabprm::flag
int flag
Definition: tab.h:576
tabprm::map
int * map
Definition: tab.h:585
tabprm::m_N
int m_N
Definition: tab.h:615
tabprm::err
struct wcserr * err
Definition: tab.h:611
tabprm::nc
int nc
Definition: tab.h:598
tabprm::m_indxs
double ** m_indxs
Definition: tab.h:618
tabprm::p0
int * p0
Definition: tab.h:604
tabprm::m_K
int * m_K
Definition: tab.h:617
tabprm::M
int M
Definition: tab.h:580
tabprm::set_M
int set_M
Definition: tab.h:616
tabprm::delta
double * delta
Definition: tab.h:605
tabprm::m_flag
int m_flag
Definition: tab.h:615
tabprm::m_map
int * m_map
Definition: tab.h:617
tabprm::extrema
double * extrema
Definition: tab.h:606
tabprm::m_crval
double * m_crval
Definition: tab.h:618
tabprm::m_coord
double * m_coord
Definition: tab.h:618
tabprm::coord
double * coord
Definition: tab.h:593
tabprm::sense
int * sense
Definition: tab.h:601
tabprm::m_M
int m_M
Definition: tab.h:615
tabprm::K
int * K
Definition: tab.h:581
tabprm::index
double ** index
Definition: tab.h:591
wcserr
Error message handling.
Definition: wcserr.h:243
tabx2s
int tabx2s(struct tabprm *tab, int ncoord, int nelem, const double x[], double world[], int stat[])
Pixel-to-world transformation.
tabsize
int tabsize(const struct tabprm *tab, int size[2])
Compute the size of a tabprm struct.
tabfree
int tabfree(struct tabprm *tab)
Destructor for the tabprm struct.
tabset
int tabset(struct tabprm *tab)
Setup routine for the tabprm struct.
tabcmp
int tabcmp(int cmp, double tol, const struct tabprm *tab1, const struct tabprm *tab2, int *equal)
Compare two tabprm structs for equality.
tabperr
int tabperr(const struct tabprm *tab, const char *prefix)
Print error messages from a tabprm struct.
tabprt
int tabprt(const struct tabprm *tab)
Print routine for the tabprm struct.
tab_errmsg
const char * tab_errmsg[]
Status return messages.
tabcpy
int tabcpy(int alloc, const struct tabprm *tabsrc, struct tabprm *tabdst)
Copy routine for the tabprm struct.
tabs2x
int tabs2x(struct tabprm *tab, int ncoord, int nelem, const double world[], double x[], int stat[])
World-to-pixel transformation.
tabini
int tabini(int alloc, int M, const int K[], struct tabprm *tab)
Default constructor for the tabprm struct.
tab_errmsg_enum
tab_errmsg_enum
Definition: tab.h:562
TABERR_BAD_PARAMS
@ TABERR_BAD_PARAMS
Definition: tab.h:566
TABERR_MEMORY
@ TABERR_MEMORY
Definition: tab.h:565
TABERR_SUCCESS
@ TABERR_SUCCESS
Definition: tab.h:563
TABERR_BAD_WORLD
@ TABERR_BAD_WORLD
Definition: tab.h:569
TABERR_NULL_POINTER
@ TABERR_NULL_POINTER
Definition: tab.h:564
TABERR_BAD_X
@ TABERR_BAD_X
Definition: tab.h:567
tabmem
int tabmem(struct tabprm *tab)
Acquire tabular memory.