File: edithdu.c

package info (click to toggle)
cfitsio 3.470-3
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 14,484 kB
  • sloc: ansic: 106,145; yacc: 4,883; sh: 3,259; fortran: 2,613; lex: 504; makefile: 162
file content (883 lines) | stat: -rw-r--r-- 31,282 bytes parent folder | download | duplicates (9)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
/*  This file, edithdu.c, contains the FITSIO routines related to       */
/*  copying, inserting, or deleting HDUs in a FITS file                 */

/*  The FITSIO software was written by William Pence at the High Energy    */
/*  Astrophysic Science Archive Research Center (HEASARC) at the NASA      */
/*  Goddard Space Flight Center.                                           */

#include <string.h>
#include <stdlib.h>
#include "fitsio2.h"
/*--------------------------------------------------------------------------*/
int ffcopy(fitsfile *infptr,    /* I - FITS file pointer to input file  */
           fitsfile *outfptr,   /* I - FITS file pointer to output file */
           int morekeys,        /* I - reserve space in output header   */
           int *status)         /* IO - error status     */
/*
  copy the CHDU from infptr to the CHDU of outfptr.
  This will also allocate space in the output header for MOREKY keywords
*/
{
    int nspace;
    
    if (*status > 0)
        return(*status);

    if (infptr == outfptr)
        return(*status = SAME_FILE);

    if (ffcphd(infptr, outfptr, status) > 0)  /* copy the header keywords */
       return(*status);

    if (morekeys > 0) {
      ffhdef(outfptr, morekeys, status); /* reserve space for more keywords */

    } else {
        if (ffghsp(infptr, NULL, &nspace, status) > 0) /* get existing space */
            return(*status);

        if (nspace > 0) {
            ffhdef(outfptr, nspace, status); /* preserve same amount of space */
            if (nspace >= 35) {  

	        /* There is at least 1 full empty FITS block in the header. */
	        /* Physically write the END keyword at the beginning of the */
	        /* last block to preserve this extra space now rather than */
		/* later.  This is needed by the stream: driver which cannot */
		/* seek back to the header to write the END keyword later. */

	        ffwend(outfptr, status);
            }
        }
    }

    ffcpdt(infptr, outfptr, status);  /* now copy the data unit */

    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffcpfl(fitsfile *infptr,    /* I - FITS file pointer to input file  */
           fitsfile *outfptr,   /* I - FITS file pointer to output file */
           int previous,        /* I - copy any previous HDUs?   */
           int current,         /* I - copy the current HDU?     */
           int following,       /* I - copy any following HDUs?   */
           int *status)         /* IO - error status     */
/*
  copy all or part of the input file to the output file.
*/
{
    int hdunum, ii;

    if (*status > 0)
        return(*status);

    if (infptr == outfptr)
        return(*status = SAME_FILE);

    ffghdn(infptr, &hdunum);

    if (previous) {   /* copy any previous HDUs */
        for (ii=1; ii < hdunum; ii++) {
            ffmahd(infptr, ii, NULL, status);
            ffcopy(infptr, outfptr, 0, status);
        }
    }

    if (current && (*status <= 0) ) {  /* copy current HDU */
        ffmahd(infptr, hdunum, NULL, status);
        ffcopy(infptr, outfptr, 0, status);
    }

    if (following && (*status <= 0) ) { /* copy any remaining HDUs */
        ii = hdunum + 1;
        while (1)
        { 
            if (ffmahd(infptr, ii, NULL, status) ) {
                 /* reset expected end of file status */
                 if (*status == END_OF_FILE)
                    *status = 0;
                 break;
            }

            if (ffcopy(infptr, outfptr, 0, status))
                 break;  /* quit on unexpected error */

            ii++;
        }
    }

    ffmahd(infptr, hdunum, NULL, status);  /* restore initial position */
    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffcphd(fitsfile *infptr,    /* I - FITS file pointer to input file  */
           fitsfile *outfptr,   /* I - FITS file pointer to output file */
           int *status)         /* IO - error status     */
/*
  copy the header keywords from infptr to outfptr.
*/
{
    int nkeys, ii, inPrim = 0, outPrim = 0;
    long naxis, naxes[1];
    char *card, comm[FLEN_COMMENT];
    char *tmpbuff;

    if (*status > 0)
        return(*status);

    if (infptr == outfptr)
        return(*status = SAME_FILE);

    /* set the input pointer to the correct HDU */
    if (infptr->HDUposition != (infptr->Fptr)->curhdu)
        ffmahd(infptr, (infptr->HDUposition) + 1, NULL, status);

    if (ffghsp(infptr, &nkeys, NULL, status) > 0) /* get no. of keywords */
        return(*status);

    /* create a memory buffer to hold the header records */
    tmpbuff = (char*) malloc(nkeys*FLEN_CARD*sizeof(char));
    if (!tmpbuff)
        return(*status = MEMORY_ALLOCATION);

    /* read all of the header records in the input HDU */
    for (ii = 0; ii < nkeys; ii++)
      ffgrec(infptr, ii+1, tmpbuff + (ii * FLEN_CARD), status);

    if (infptr->HDUposition == 0)  /* set flag if this is the Primary HDU */
       inPrim = 1;

    /* if input is an image hdu, get the number of axes */
    naxis = -1;   /* negative if HDU is a table */
    if ((infptr->Fptr)->hdutype == IMAGE_HDU)
        ffgkyj(infptr, "NAXIS", &naxis, NULL, status);

    /* set the output pointer to the correct HDU */
    if (outfptr->HDUposition != (outfptr->Fptr)->curhdu)
        ffmahd(outfptr, (outfptr->HDUposition) + 1, NULL, status);

    /* check if output header is empty; if not create new empty HDU */
    if ((outfptr->Fptr)->headend !=
        (outfptr->Fptr)->headstart[(outfptr->Fptr)->curhdu] )
           ffcrhd(outfptr, status);   

    if (outfptr->HDUposition == 0)
    {
        if (naxis < 0)
        {
            /* the input HDU is a table, so we have to create */
            /* a dummy Primary array before copying it to the output */
            ffcrim(outfptr, 8, 0, naxes, status);
            ffcrhd(outfptr, status); /* create new empty HDU */
        }
        else
        {
            /* set flag that this is the Primary HDU */
            outPrim = 1;
        }
    }

    if (*status > 0)  /* check for errors before proceeding */
    {
        free(tmpbuff);
        return(*status);
    }
    if ( inPrim == 1 && outPrim == 0 )
    {
        /* copying from primary array to image extension */
        strcpy(comm, "IMAGE extension");
        ffpkys(outfptr, "XTENSION", "IMAGE", comm, status);

        /* copy BITPIX through NAXISn keywords */
        for (ii = 1; ii < 3 + naxis; ii++)
        {
            card = tmpbuff + (ii * FLEN_CARD);
            ffprec(outfptr, card, status);
        }

        strcpy(comm, "number of random group parameters");
        ffpkyj(outfptr, "PCOUNT", 0, comm, status);
  
        strcpy(comm, "number of random groups");
        ffpkyj(outfptr, "GCOUNT", 1, comm, status);


        /* copy remaining keywords, excluding EXTEND, and reference COMMENT keywords */
        for (ii = 3 + naxis ; ii < nkeys; ii++)
        {
            card = tmpbuff+(ii * FLEN_CARD);
            if (FSTRNCMP(card, "EXTEND  ", 8) &&
                FSTRNCMP(card, "COMMENT   FITS (Flexible Image Transport System) format is", 58) && 
                FSTRNCMP(card, "COMMENT   and Astrophysics', volume 376, page 3", 47) )
            {
                 ffprec(outfptr, card, status);
            }
        }
    }
    else if ( inPrim == 0 && outPrim == 1 )
    {
        /* copying between image extension and primary array */
        strcpy(comm, "file does conform to FITS standard");
        ffpkyl(outfptr, "SIMPLE", TRUE, comm, status);

        /* copy BITPIX through NAXISn keywords */
        for (ii = 1; ii < 3 + naxis; ii++)
        {
            card = tmpbuff + (ii * FLEN_CARD);
            ffprec(outfptr, card, status);
        }

        /* add the EXTEND keyword */
        strcpy(comm, "FITS dataset may contain extensions");
        ffpkyl(outfptr, "EXTEND", TRUE, comm, status);

      /* write standard block of self-documentating comments */
      ffprec(outfptr,
      "COMMENT   FITS (Flexible Image Transport System) format is defined in 'Astronomy",
      status);
      ffprec(outfptr,
      "COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H",
      status);

        /* copy remaining keywords, excluding pcount, gcount */
        for (ii = 3 + naxis; ii < nkeys; ii++)
        {
            card = tmpbuff+(ii * FLEN_CARD);
            if (FSTRNCMP(card, "PCOUNT  ", 8) && FSTRNCMP(card, "GCOUNT  ", 8))
            {
                 ffprec(outfptr, card, status);
            }
        }
    }
    else
    {
        /* input and output HDUs are same type; simply copy all keywords */
        for (ii = 0; ii < nkeys; ii++)
        {
            card = tmpbuff+(ii * FLEN_CARD);
            ffprec(outfptr, card, status);
        }
    }

    free(tmpbuff);
    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffcpdt(fitsfile *infptr,    /* I - FITS file pointer to input file  */
           fitsfile *outfptr,   /* I - FITS file pointer to output file */
           int *status)         /* IO - error status     */
{
/*
  copy the data unit from the CHDU of infptr to the CHDU of outfptr. 
  This will overwrite any data already in the outfptr CHDU.
*/
    long nb, ii;
    LONGLONG indatastart, indataend, outdatastart;
    char buffer[2880];

    if (*status > 0)
        return(*status);

    if (infptr == outfptr)
        return(*status = SAME_FILE);

    ffghadll(infptr,  NULL, &indatastart, &indataend, status);
    ffghadll(outfptr, NULL, &outdatastart, NULL, status);

    /* Calculate the number of blocks to be copied  */
    nb = (long) ((indataend - indatastart) / 2880);

    if (nb > 0)
    {
      if (infptr->Fptr == outfptr->Fptr)
      {
        /* copying between 2 HDUs in the SAME file */
        for (ii = 0; ii < nb; ii++)
        {
            ffmbyt(infptr,  indatastart,  REPORT_EOF, status);
            ffgbyt(infptr,  2880L, buffer, status); /* read input block */

            ffmbyt(outfptr, outdatastart, IGNORE_EOF, status);
            ffpbyt(outfptr, 2880L, buffer, status); /* write output block */

            indatastart  += 2880; /* move address */
            outdatastart += 2880; /* move address */
        }
      }
      else
      {
        /* copying between HDUs in separate files */
        /* move to the initial copy position in each of the files */
        ffmbyt(infptr,  indatastart,  REPORT_EOF, status);
        ffmbyt(outfptr, outdatastart, IGNORE_EOF, status);

        for (ii = 0; ii < nb; ii++)
        {
            ffgbyt(infptr,  2880L, buffer, status); /* read input block */
            ffpbyt(outfptr, 2880L, buffer, status); /* write output block */
        }
      }
    }
    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffwrhdu(fitsfile *infptr,    /* I - FITS file pointer to input file  */
            FILE *outstream,     /* I - stream to write HDU to */
            int *status)         /* IO - error status     */
{
/*
  write the data unit from the CHDU of infptr to the output file stream
*/
    long nb, ii;
    LONGLONG hdustart, hduend;
    char buffer[2880];

    if (*status > 0)
        return(*status);

    ffghadll(infptr, &hdustart,  NULL, &hduend, status);

    nb = (long) ((hduend - hdustart) / 2880);  /* number of blocks to copy */

    if (nb > 0)
    {

        /* move to the start of the HDU */
        ffmbyt(infptr,  hdustart,  REPORT_EOF, status);

        for (ii = 0; ii < nb; ii++)
        {
            ffgbyt(infptr,  2880L, buffer, status); /* read input block */
            fwrite(buffer, 1, 2880, outstream ); /* write to output stream */
        }
    }
    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffiimg(fitsfile *fptr,      /* I - FITS file pointer           */
           int bitpix,          /* I - bits per pixel              */
           int naxis,           /* I - number of axes in the array */
           long *naxes,         /* I - size of each axis           */
           int *status)         /* IO - error status               */
/*
  insert an IMAGE extension following the current HDU 
*/
{
    LONGLONG tnaxes[99];
    int ii;
    
    if (*status > 0)
        return(*status);

    if (naxis > 99) {
        ffpmsg("NAXIS value is too large (>99)  (ffiimg)");
	return(*status = 212);
    }

    for (ii = 0; (ii < naxis); ii++)
       tnaxes[ii] = naxes[ii];
       
    ffiimgll(fptr, bitpix, naxis, tnaxes, status);

    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffiimgll(fitsfile *fptr,    /* I - FITS file pointer           */
           int bitpix,          /* I - bits per pixel              */
           int naxis,           /* I - number of axes in the array */
           LONGLONG *naxes,     /* I - size of each axis           */
           int *status)         /* IO - error status               */
/*
  insert an IMAGE extension following the current HDU 
*/
{
    int bytlen, nexthdu, maxhdu, ii, onaxis;
    long nblocks;
    LONGLONG npixels, newstart, datasize;
    char errmsg[FLEN_ERRMSG], card[FLEN_CARD], naxiskey[FLEN_KEYWORD];

    if (*status > 0)
        return(*status);

    if (fptr->HDUposition != (fptr->Fptr)->curhdu)
        ffmahd(fptr, (fptr->HDUposition) + 1, NULL, status);

    maxhdu = (fptr->Fptr)->maxhdu;

    if (*status != PREPEND_PRIMARY)
    {
      /* if the current header is completely empty ...  */
      if (( (fptr->Fptr)->headend == (fptr->Fptr)->headstart[(fptr->Fptr)->curhdu])
        /* or, if we are at the end of the file, ... */
      ||  ( (((fptr->Fptr)->curhdu) == maxhdu ) &&
       ((fptr->Fptr)->headstart[maxhdu + 1] >= (fptr->Fptr)->logfilesize ) ) )
      {
        /* then simply append new image extension */
        ffcrimll(fptr, bitpix, naxis, naxes, status);
        return(*status);
      }
    }

    if (bitpix == 8)
        bytlen = 1;
    else if (bitpix == 16)
        bytlen = 2;
    else if (bitpix == 32 || bitpix == -32)
        bytlen = 4;
    else if (bitpix == 64 || bitpix == -64)
        bytlen = 8;
    else
    {
        snprintf(errmsg, FLEN_ERRMSG,
        "Illegal value for BITPIX keyword: %d", bitpix);
        ffpmsg(errmsg);
        return(*status = BAD_BITPIX);  /* illegal bitpix value */
    }
    if (naxis < 0 || naxis > 999)
    {
        snprintf(errmsg, FLEN_ERRMSG,
        "Illegal value for NAXIS keyword: %d", naxis);
        ffpmsg(errmsg);
        return(*status = BAD_NAXIS);
    }

    for (ii = 0; ii < naxis; ii++)
    {
        if (naxes[ii] < 0)
        {
            snprintf(errmsg, FLEN_ERRMSG,
            "Illegal value for NAXIS%d keyword: %ld", ii + 1,  (long) naxes[ii]);
            ffpmsg(errmsg);
            return(*status = BAD_NAXES);
        }
    }

    /* calculate number of pixels in the image */
    if (naxis == 0)
        npixels = 0;
    else 
        npixels = naxes[0];

    for (ii = 1; ii < naxis; ii++)
        npixels = npixels * naxes[ii];

    datasize = npixels * bytlen;          /* size of image in bytes */
    nblocks = (long) (((datasize + 2879) / 2880) + 1);  /* +1 for the header */

    if ((fptr->Fptr)->writemode == READWRITE) /* must have write access */
    {   /* close the CHDU */
        ffrdef(fptr, status);  /* scan header to redefine structure */
        ffpdfl(fptr, status);  /* insure correct data file values */
    }
    else
        return(*status = READONLY_FILE);

    if (*status == PREPEND_PRIMARY)
    {
        /* inserting a new primary array; the current primary */
        /* array must be transformed into an image extension. */

        *status = 0;   
        ffmahd(fptr, 1, NULL, status);  /* move to the primary array */

        ffgidm(fptr, &onaxis, status);
        if (onaxis > 0)
            ffkeyn("NAXIS",onaxis, naxiskey, status);
        else
            strcpy(naxiskey, "NAXIS");

        ffgcrd(fptr, naxiskey, card, status);  /* read last NAXIS keyword */
        
        ffikyj(fptr, "PCOUNT", 0, "required keyword", status); /* add PCOUNT and */
        ffikyj(fptr, "GCOUNT", 1, "required keyword", status); /* GCOUNT keywords */

        if (*status > 0)
            return(*status);

        if (ffdkey(fptr, "EXTEND", status) ) /* delete the EXTEND keyword */
            *status = 0;

        /* redefine internal structure for this HDU */
        ffrdef(fptr, status);


        /* insert space for the primary array */
        if (ffiblk(fptr, nblocks, -1, status) > 0)  /* insert the blocks */
            return(*status);

        nexthdu = 0;  /* number of the new hdu */
        newstart = 0; /* starting addr of HDU */
    }
    else
    {
        nexthdu = ((fptr->Fptr)->curhdu) + 1; /* number of the next (new) hdu */
        newstart = (fptr->Fptr)->headstart[nexthdu]; /* save starting addr of HDU */

        (fptr->Fptr)->hdutype = IMAGE_HDU;  /* so that correct fill value is used */
        /* ffiblk also increments headstart for all following HDUs */
        if (ffiblk(fptr, nblocks, 1, status) > 0)  /* insert the blocks */
            return(*status);
    }

    ((fptr->Fptr)->maxhdu)++;      /* increment known number of HDUs in the file */
    for (ii = (fptr->Fptr)->maxhdu; ii > (fptr->Fptr)->curhdu; ii--)
        (fptr->Fptr)->headstart[ii + 1] = (fptr->Fptr)->headstart[ii]; /* incre start addr */

    if (nexthdu == 0)
       (fptr->Fptr)->headstart[1] = nblocks * 2880; /* start of the old Primary array */

    (fptr->Fptr)->headstart[nexthdu] = newstart; /* set starting addr of HDU */

    /* set default parameters for this new empty HDU */
    (fptr->Fptr)->curhdu = nexthdu;   /* we are now located at the next HDU */
    fptr->HDUposition = nexthdu;      /* we are now located at the next HDU */
    (fptr->Fptr)->nextkey = (fptr->Fptr)->headstart[nexthdu];  
    (fptr->Fptr)->headend = (fptr->Fptr)->headstart[nexthdu];
    (fptr->Fptr)->datastart = ((fptr->Fptr)->headstart[nexthdu]) + 2880;
    (fptr->Fptr)->hdutype = IMAGE_HDU;  /* might need to be reset... */

    /* write the required header keywords */
    ffphprll(fptr, TRUE, bitpix, naxis, naxes, 0, 1, TRUE, status);

    /* redefine internal structure for this HDU */
    ffrdef(fptr, status);
    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffitab(fitsfile *fptr,  /* I - FITS file pointer                        */
           LONGLONG naxis1,     /* I - width of row in the table                */
           LONGLONG naxis2,     /* I - number of rows in the table              */
           int tfields,     /* I - number of columns in the table           */
           char **ttype,    /* I - name of each column                      */
           long *tbcol,     /* I - byte offset in row to each column        */
           char **tform,    /* I - value of TFORMn keyword for each column  */
           char **tunit,    /* I - value of TUNITn keyword for each column  */
           const char *extnmx,   /* I - value of EXTNAME keyword, if any         */
           int *status)     /* IO - error status                            */
/*
  insert an ASCII table extension following the current HDU 
*/
{
    int nexthdu, maxhdu, ii, nunit, nhead, ncols, gotmem = 0;
    long nblocks, rowlen;
    LONGLONG datasize, newstart;
    char errmsg[FLEN_ERRMSG], extnm[FLEN_VALUE];

    if (*status > 0)
        return(*status);

    extnm[0] = '\0';
    if (extnmx)
      strncat(extnm, extnmx, FLEN_VALUE-1);

    if (fptr->HDUposition != (fptr->Fptr)->curhdu)
        ffmahd(fptr, (fptr->HDUposition) + 1, NULL, status);

    maxhdu = (fptr->Fptr)->maxhdu;
    /* if the current header is completely empty ...  */
    if (( (fptr->Fptr)->headend == (fptr->Fptr)->headstart[(fptr->Fptr)->curhdu] )
        /* or, if we are at the end of the file, ... */
    ||  ( (((fptr->Fptr)->curhdu) == maxhdu ) &&
       ((fptr->Fptr)->headstart[maxhdu + 1] >= (fptr->Fptr)->logfilesize ) ) )
    {
        /* then simply append new image extension */
        ffcrtb(fptr, ASCII_TBL, naxis2, tfields, ttype, tform, tunit,
               extnm, status);
        return(*status);
    }

    if (naxis1 < 0)
        return(*status = NEG_WIDTH);
    else if (naxis2 < 0)
        return(*status = NEG_ROWS);
    else if (tfields < 0 || tfields > 999)
    {
        snprintf(errmsg, FLEN_ERRMSG,
        "Illegal value for TFIELDS keyword: %d", tfields);
        ffpmsg(errmsg);
        return(*status = BAD_TFIELDS);
    }

    /* count number of optional TUNIT keywords to be written */
    nunit = 0;
    for (ii = 0; ii < tfields; ii++)
    {
        if (tunit && *tunit && *tunit[ii])
            nunit++;
    }

    if (*extnm)
         nunit++;     /* add one for the EXTNAME keyword */

    rowlen = (long) naxis1;

    if (!tbcol || !tbcol[0] || (!naxis1 && tfields)) /* spacing not defined? */
    {
      /* allocate mem for tbcol; malloc may have problems allocating small */
      /* arrays, so allocate at least 20 bytes */

      ncols = maxvalue(5, tfields);
      tbcol = (long *) calloc(ncols, sizeof(long));

      if (tbcol)
      {
        gotmem = 1;

        /* calculate width of a row and starting position of each column. */
        /* Each column will be separated by 1 blank space */
        ffgabc(tfields, tform, 1, &rowlen, tbcol, status);
      }
    }

    nhead = (9 + (3 * tfields) + nunit + 35) / 36;  /* no. of header blocks */
    datasize = (LONGLONG)rowlen * naxis2;          /* size of table in bytes */
    nblocks = (long) (((datasize + 2879) / 2880) + nhead);  /* size of HDU */

    if ((fptr->Fptr)->writemode == READWRITE) /* must have write access */
    {   /* close the CHDU */
        ffrdef(fptr, status);  /* scan header to redefine structure */
        ffpdfl(fptr, status);  /* insure correct data file values */
    }
    else
        return(*status = READONLY_FILE);

    nexthdu = ((fptr->Fptr)->curhdu) + 1; /* number of the next (new) hdu */
    newstart = (fptr->Fptr)->headstart[nexthdu]; /* save starting addr of HDU */

    (fptr->Fptr)->hdutype = ASCII_TBL;  /* so that correct fill value is used */
    /* ffiblk also increments headstart for all following HDUs */
    if (ffiblk(fptr, nblocks, 1, status) > 0)  /* insert the blocks */
    {
        if (gotmem)
            free(tbcol); 
        return(*status);
    }

    ((fptr->Fptr)->maxhdu)++;      /* increment known number of HDUs in the file */
    for (ii = (fptr->Fptr)->maxhdu; ii > (fptr->Fptr)->curhdu; ii--)
        (fptr->Fptr)->headstart[ii + 1] = (fptr->Fptr)->headstart[ii]; /* incre start addr */

    (fptr->Fptr)->headstart[nexthdu] = newstart; /* set starting addr of HDU */

    /* set default parameters for this new empty HDU */
    (fptr->Fptr)->curhdu = nexthdu;   /* we are now located at the next HDU */
    fptr->HDUposition = nexthdu;      /* we are now located at the next HDU */
    (fptr->Fptr)->nextkey = (fptr->Fptr)->headstart[nexthdu];  
    (fptr->Fptr)->headend = (fptr->Fptr)->headstart[nexthdu];
    (fptr->Fptr)->datastart = ((fptr->Fptr)->headstart[nexthdu]) + (nhead * 2880);
    (fptr->Fptr)->hdutype = ASCII_TBL;  /* might need to be reset... */

    /* write the required header keywords */

    ffphtb(fptr, rowlen, naxis2, tfields, ttype, tbcol, tform, tunit,
           extnm, status);

    if (gotmem)
        free(tbcol); 

    /* redefine internal structure for this HDU */

    ffrdef(fptr, status);
    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffibin(fitsfile *fptr,  /* I - FITS file pointer                        */
           LONGLONG naxis2,     /* I - number of rows in the table              */
           int tfields,     /* I - number of columns in the table           */
           char **ttype,    /* I - name of each column                      */
           char **tform,    /* I - value of TFORMn keyword for each column  */
           char **tunit,    /* I - value of TUNITn keyword for each column  */
           const char *extnmx,     /* I - value of EXTNAME keyword, if any         */
           LONGLONG pcount, /* I - size of special data area (heap)         */
           int *status)     /* IO - error status                            */
/*
  insert a Binary table extension following the current HDU 
*/
{
    int nexthdu, maxhdu, ii, nunit, nhead, datacode;
    LONGLONG naxis1;
    long nblocks, repeat, width;
    LONGLONG datasize, newstart;
    char errmsg[FLEN_ERRMSG], extnm[FLEN_VALUE];

    if (*status > 0)
        return(*status);

    extnm[0] = '\0';
    if (extnmx)
      strncat(extnm, extnmx, FLEN_VALUE-1);

    if (fptr->HDUposition != (fptr->Fptr)->curhdu)
        ffmahd(fptr, (fptr->HDUposition) + 1, NULL, status);

    maxhdu = (fptr->Fptr)->maxhdu;
    /* if the current header is completely empty ...  */
    if (( (fptr->Fptr)->headend == (fptr->Fptr)->headstart[(fptr->Fptr)->curhdu] )
        /* or, if we are at the end of the file, ... */
    ||  ( (((fptr->Fptr)->curhdu) == maxhdu ) &&
       ((fptr->Fptr)->headstart[maxhdu + 1] >= (fptr->Fptr)->logfilesize ) ) )
    {
        /* then simply append new image extension */
        ffcrtb(fptr, BINARY_TBL, naxis2, tfields, ttype, tform, tunit,
               extnm, status);
        return(*status);
    }

    if (naxis2 < 0)
        return(*status = NEG_ROWS);
    else if (tfields < 0 || tfields > 999)
    {
        snprintf(errmsg, FLEN_ERRMSG,
        "Illegal value for TFIELDS keyword: %d", tfields);
        ffpmsg(errmsg);
        return(*status = BAD_TFIELDS);
    }

    /* count number of optional TUNIT keywords to be written */
    nunit = 0;
    for (ii = 0; ii < tfields; ii++)
    {
        if (tunit && *tunit && *tunit[ii])
            nunit++;
    }

    if (*extnm)
         nunit++;     /* add one for the EXTNAME keyword */

    nhead = (9 + (2 * tfields) + nunit + 35) / 36;  /* no. of header blocks */

    /* calculate total width of the table */
    naxis1 = 0;
    for (ii = 0; ii < tfields; ii++)
    {
        ffbnfm(tform[ii], &datacode, &repeat, &width, status);

        if (datacode == TBIT)
            naxis1 = naxis1 + ((repeat + 7) / 8);
        else if (datacode == TSTRING)
            naxis1 += repeat;
        else
            naxis1 = naxis1 + (repeat * width);
    }

    datasize = ((LONGLONG)naxis1 * naxis2) + pcount;         /* size of table in bytes */
    nblocks = (long) ((datasize + 2879) / 2880) + nhead;  /* size of HDU */

    if ((fptr->Fptr)->writemode == READWRITE) /* must have write access */
    {   /* close the CHDU */
        ffrdef(fptr, status);  /* scan header to redefine structure */
        ffpdfl(fptr, status);  /* insure correct data file values */
    }
    else
        return(*status = READONLY_FILE);

    nexthdu = ((fptr->Fptr)->curhdu) + 1; /* number of the next (new) hdu */
    newstart = (fptr->Fptr)->headstart[nexthdu]; /* save starting addr of HDU */

    (fptr->Fptr)->hdutype = BINARY_TBL;  /* so that correct fill value is used */

    /* ffiblk also increments headstart for all following HDUs */
    if (ffiblk(fptr, nblocks, 1, status) > 0)  /* insert the blocks */
        return(*status);

    ((fptr->Fptr)->maxhdu)++;      /* increment known number of HDUs in the file */
    for (ii = (fptr->Fptr)->maxhdu; ii > (fptr->Fptr)->curhdu; ii--)
        (fptr->Fptr)->headstart[ii + 1] = (fptr->Fptr)->headstart[ii]; /* incre start addr */

    (fptr->Fptr)->headstart[nexthdu] = newstart; /* set starting addr of HDU */

    /* set default parameters for this new empty HDU */
    (fptr->Fptr)->curhdu = nexthdu;   /* we are now located at the next HDU */
    fptr->HDUposition = nexthdu;      /* we are now located at the next HDU */
    (fptr->Fptr)->nextkey = (fptr->Fptr)->headstart[nexthdu];  
    (fptr->Fptr)->headend = (fptr->Fptr)->headstart[nexthdu];
    (fptr->Fptr)->datastart = ((fptr->Fptr)->headstart[nexthdu]) + (nhead * 2880);
    (fptr->Fptr)->hdutype = BINARY_TBL;  /* might need to be reset... */

    /* write the required header keywords. This will write PCOUNT = 0 */
    /* so that the variable length data will be written at the right place */
    ffphbn(fptr, naxis2, tfields, ttype, tform, tunit, extnm, pcount,
           status);

    /* redefine internal structure for this HDU (with PCOUNT = 0) */
    ffrdef(fptr, status);

    return(*status);
}
/*--------------------------------------------------------------------------*/
int ffdhdu(fitsfile *fptr,      /* I - FITS file pointer                   */
           int *hdutype,        /* O - type of the new CHDU after deletion */
           int *status)         /* IO - error status                       */
/*
  Delete the CHDU.  If the CHDU is the primary array, then replace the HDU
  with an empty primary array with no data.   Return the
  type of the new CHDU after the old CHDU is deleted.
*/
{
    int tmptype = 0;
    long nblocks, ii, naxes[1];

    if (*status > 0)
        return(*status);

    if (fptr->HDUposition != (fptr->Fptr)->curhdu)
        ffmahd(fptr, (fptr->HDUposition) + 1, NULL, status);

    if ((fptr->Fptr)->curhdu == 0) /* replace primary array with null image */
    {
        /* ignore any existing keywords */
        (fptr->Fptr)->headend = 0;
        (fptr->Fptr)->nextkey = 0;

        /* write default primary array header */
        ffphpr(fptr,1,8,0,naxes,0,1,1,status);

        /* calc number of blocks to delete (leave just 1 block) */
        nblocks = (long) (( (fptr->Fptr)->headstart[(fptr->Fptr)->curhdu + 1] - 
                2880 ) / 2880);

        /* ffdblk also updates the starting address of all following HDUs */
        if (nblocks > 0)
        {
            if (ffdblk(fptr, nblocks, status) > 0) /* delete the HDU */
                return(*status);
        }

        /* this might not be necessary, but is doesn't hurt */
        (fptr->Fptr)->datastart = DATA_UNDEFINED;

        ffrdef(fptr, status);  /* reinitialize the primary array */
    }
    else
    {

        /* calc number of blocks to delete */
        nblocks = (long) (( (fptr->Fptr)->headstart[(fptr->Fptr)->curhdu + 1] - 
                (fptr->Fptr)->headstart[(fptr->Fptr)->curhdu] ) / 2880);

        /* ffdblk also updates the starting address of all following HDUs */
        if (ffdblk(fptr, nblocks, status) > 0) /* delete the HDU */
            return(*status);

        /* delete the CHDU from the list of HDUs */
        for (ii = (fptr->Fptr)->curhdu + 1; ii <= (fptr->Fptr)->maxhdu; ii++)
            (fptr->Fptr)->headstart[ii] = (fptr->Fptr)->headstart[ii + 1];

        (fptr->Fptr)->headstart[(fptr->Fptr)->maxhdu + 1] = 0;
        ((fptr->Fptr)->maxhdu)--; /* decrement the known number of HDUs */

        if (ffrhdu(fptr, &tmptype, status) > 0)  /* initialize next HDU */
        {
            /* failed (end of file?), so move back one HDU */
            *status = 0;
            ffcmsg();       /* clear extraneous error messages */
            ffgext(fptr, ((fptr->Fptr)->curhdu) - 1, &tmptype, status);
        }
    }

    if (hdutype)
       *hdutype = tmptype;

    return(*status);
}