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- /******************************************************************************/
- /* Peter Kirchgessner */
- /* e-mail: pkirchg@aol.com */
- /* WWW : http://members.aol.com/pkirchg */
- /******************************************************************************/
- /* #BEG-HDR */
- /* */
- /* Package : FITS reading/writing library */
- /* Modul-Name : fitsrw.c */
- /* Description : Support of reading/writing FITS-files */
- /* Function(s) : fits_new_filestruct - (local) initialize file structure*/
- /* fits_new_hdulist - (local) initialize hdulist struct*/
- /* fits_delete_filestruct - (local) delete file structure */
- /* fits_delete_recordlist - (local) delete record list */
- /* fits_delete_hdulist - (local) delete hdu list */
- /* fits_nan_32 - (local) check IEEE NaN values */
- /* fits_nan_64 - (local) check IEEE NaN values */
- /* fits_get_error - get error message */
- /* fits_set_error - (local) set error message */
- /* fits_drop_error - (local) remove an error message */
- /* fits_open - open a FITS file */
- /* fits_close - close a FITS file */
- /* fits_add_hdu - add a HDU to a FITS file */
- /* fits_add_card - add a card to the HDU */
- /* fits_print_header - print a single FITS header */
- /* fits_read_header - (local) read in FITS header */
- /* fits_write_header - write a FITS header */
- /* fits_decode_header - (local) decode a header */
- /* fits_eval_pixrange - (local) evaluate range of pixels */
- /* fits_decode_card - decode a card */
- /* fits_search_card - search a card in a record list */
- /* fits_image_info - get information about image */
- /* fits_seek_image - position to an image */
- /* fits_read_pixel - read pixel values from file */
- /* fits_to_pgmraw - convert FITS-file to PGM-file */
- /* pgmraw_to_fits - convert PGM-file to FITS-file */
- /* */
- /* Author : P. Kirchgessner */
- /* Date of Gen. : 12-Apr-97 */
- /* Last modified : 20-Dec-97 */
- /* Version : 0.11 */
- /* Compiler Opt. : */
- /* Changes : */
- /* #MOD-0001, nn, 20-Dec-97, Initialize some variables */
- /* */
- /* #END-HDR */
- /******************************************************************************/
- /* References: */
- /* - NOST, Definition of the Flexible Image Transport System (FITS), */
- /* September 29, 1995, Standard, NOST 100-1.1 */
- /* (ftp://nssdc.gsfc.nasa.gov/pub/fits/fits_standard_ps.Z) */
- /* - The FITS IMAGE Extension. A Proposal. J.D. Ponz, R.W. Thompson, */
- /* J.R. Munoz, Feb. 7, 1992 */
- /* (ftp://www.cv.nrao.edu/fits/documents/standards/image.ps.gz) */
- /* */
- /******************************************************************************/
-
- #define VERSIO 0.11
- /* Identifikation: "@(#) <product> <ver> <dd-mmm-yy>" */
- static char ident[] = "@(#) libfits.c 0.11 20-Dec-97 (%I%)";
-
- /******************************************************************************/
- /* FITS reading/writing library */
- /* Copyright (C) 1997 Peter Kirchgessner */
- /* (email: pkirchg@aol.com, WWW: http://members.aol.com/pkirchg) */
- /* The library was developed for a FITS-plug-in to GIMP, the GNU Image */
- /* Manipulation Program. But it is completely independant to that. If someone */
- /* finds it useful for other purposes, try to keep it independant from your */
- /* application. */
- /******************************************************************************/
- /* */
- /* This program is free software; you can redistribute it and/or modify */
- /* it under the terms of the GNU General Public License as published by */
- /* the Free Software Foundation; either version 2 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 General Public License for more details. */
- /* */
- /* You should have received a copy of the GNU General Public License */
- /* along with this program; if not, write to the Free Software */
- /* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
- /******************************************************************************/
-
- #include "config.h"
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
-
- #include "fitsrw.h"
-
-
- /* Declaration of local funtions */
-
- static FITS_FILE *fits_new_filestruct (void);
- static FITS_HDU_LIST *fits_new_hdulist (void);
- static void fits_delete_filestruct (FITS_FILE *ff);
- static void fits_delete_recordlist (FITS_RECORD_LIST *rl);
- static void fits_delete_hdulist (FITS_HDU_LIST *hl);
- static int fits_nan_32 (unsigned char *value);
- static int fits_nan_64 (unsigned char *value);
- static void fits_set_error (char *errmsg);
- static void fits_drop_error (void);
- static FITS_RECORD_LIST *fits_read_header (FILE *fp, int *nrec);
- static FITS_HDU_LIST *fits_decode_header (FITS_RECORD_LIST *hdr,
- long hdr_offset, long dat_offset);
- static int fits_eval_pixrange (FILE *fp, FITS_HDU_LIST *hdu);
-
-
- /* Error handling like a FIFO */
- #define FITS_MAX_ERROR 16
- #define FITS_ERROR_LENGTH 256
- static int fits_n_error = 0;
- static char fits_error[FITS_MAX_ERROR][FITS_ERROR_LENGTH];
-
- /* What byte ordering for IEEE-format we are running on ? */
- static int fits_ieee32_intel = 0;
- static int fits_ieee32_motorola = 0;
- static int fits_ieee64_intel = 0;
- static int fits_ieee64_motorola = 0;
-
- /* Macros */
- #define FITS_RETURN(msg, val) { fits_set_error (msg); return (val); }
- #define FITS_VRETURN(msg) { fits_set_error (msg); return; }
-
- /* Get pixel values from memory. p must be an (unsigned char *) */
- #define FITS_GETBITPIX16(p,val) val = ((p[0] << 8) | (p[1]))
- #define FITS_GETBITPIX32(p,val) val = \
- ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3])
-
- /* Get floating point values from memory. p must be an (unsigned char *). */
- /* The floating point values must directly correspond */
- /* to machine representation. Otherwise it does not work. */
- #define FITS_GETBITPIXM32(p,val) \
- { if (fits_ieee32_intel) {unsigned char uc[4]; \
- uc[0] = p[3]; uc[1] = p[2]; uc[2] = p[1]; uc[3] = p[0]; \
- val = *(FITS_BITPIXM32 *)uc; } \
- else if (fits_ieee32_motorola) { val = *(FITS_BITPIXM32 *)p; } \
- else if (fits_ieee64_motorola) {FITS_BITPIXM64 m64; \
- unsigned char *uc= (unsigned char *)&m64; \
- uc[0]=p[0]; uc[1]=p[1]; uc[2]=p[2]; uc[3]=p[3]; uc[4]=uc[5]=uc[6]=uc[7]=0; \
- val = (FITS_BITPIXM32)m64; } \
- else if (fits_ieee64_intel) {FITS_BITPIXM64 i64; \
- unsigned char *uc= (unsigned char *)&i64; \
- uc[0]=uc[1]=uc[2]=uc[3]=0; uc[7]=p[0]; uc[6]=p[1]; uc[5]=p[2]; uc[4]=p[3]; \
- val = (FITS_BITPIXM32)i64;}\
- }
-
- #define FITS_GETBITPIXM64(p,val) \
- { if (fits_ieee64_intel) {unsigned char uc[8]; \
- uc[0] = p[7]; uc[1] = p[6]; uc[2] = p[5]; uc[3] = p[4]; \
- uc[4] = p[3]; uc[5] = p[2]; uc[6] = p[1]; uc[7] = p[0]; \
- val = *(FITS_BITPIXM64 *)uc; } else val = *(FITS_BITPIXM64 *)p; }
-
- #define FITS_WRITE_BOOLCARD(fp,key,value) \
- {char card[81]; \
- sprintf (card, "%-8.8s= %20s%50s", key, value ? "T" : "F", " "); \
- fwrite (card, 1, 80, fp); }
-
- #define FITS_WRITE_LONGCARD(fp,key,value) \
- {char card[81]; \
- sprintf (card, "%-8.8s= %20ld%50s", key, (long)value, " "); \
- fwrite (card, 1, 80, fp); }
-
- #define FITS_WRITE_DOUBLECARD(fp,key,value) \
- {char card[81], dbl[21], *istr; \
- sprintf (dbl, "%20f", (double)value); istr = strstr (dbl, "e"); \
- if (istr) *istr = 'E'; \
- sprintf (card, "%-8.8s= %20.20s%50s", key, dbl, " "); \
- fwrite (card, 1, 80, fp); }
-
- #define FITS_WRITE_STRINGCARD(fp,key,value) \
- {char card[81]; int k;\
- sprintf (card, "%-8.8s= \'%s", key, value); \
- for (k = strlen (card); k < 81; k++) card[k] = ' '; \
- k = strlen (key); if (k < 8) card[19] = '\''; else card[11+k] = '\''; \
- fwrite (card, 1, 80, fp); }
-
- #define FITS_WRITE_CARD(fp,value) \
- {char card[81]; \
- sprintf (card, "%-80.80s", value); \
- fwrite (card, 1, 80, fp); }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_new_filestruct - (local) initialize file structure */
- /* */
- /* Parameters: */
- /* -none- */
- /* */
- /* Returns a pointer to an initialized fits file structure. */
- /* On failure, a NULL-pointer is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static FITS_FILE *fits_new_filestruct (void)
-
- {FITS_FILE *ff;
-
- ff = (FITS_FILE *)malloc (sizeof (FITS_FILE));
- if (ff == NULL) return (NULL);
-
- memset ((char *)ff, 0, sizeof (*ff));
- return (ff);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_new_hdulist - (local) initialize hdulist structure */
- /* */
- /* Parameters: */
- /* -none- */
- /* */
- /* Returns a pointer to an initialized hdulist structure. */
- /* On failure, a NULL-pointer is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static FITS_HDU_LIST *fits_new_hdulist (void)
-
- {FITS_HDU_LIST *hdl;
-
- hdl = (FITS_HDU_LIST *)malloc (sizeof (FITS_HDU_LIST));
- if (hdl == NULL) return (NULL);
-
- memset ((char *)hdl, 0, sizeof (*hdl));
- hdl->pixmin = hdl->pixmax = hdl->datamin = hdl->datamax = 0.0;
- hdl->bzero = hdl->bscale = 0.0;
-
- return (hdl);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_delete_filestruct - (local) delete file structure */
- /* */
- /* Parameters: */
- /* FITS_FILE *ff [I] : pointer to fits file structure */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* Frees all memory allocated by the file structure. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static void fits_delete_filestruct (FITS_FILE *ff)
-
- {
- if (ff == NULL) return;
-
- fits_delete_hdulist (ff->hdu_list);
- ff->hdu_list = NULL;
-
- ff->fp = NULL;
- free ((char *)ff);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_delete_recordlist - (local) delete record list */
- /* */
- /* Parameters: */
- /* FITS_RECORD_LIST *rl [I] : record list to delete */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static void fits_delete_recordlist (FITS_RECORD_LIST *rl)
-
- {FITS_RECORD_LIST *next;
-
- while (rl != NULL)
- {
- next = rl->next_record;
- rl->next_record = NULL;
- free ((char *)rl);
- rl = next;
- }
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_delete_hdulist - (local) delete hdu list */
- /* */
- /* Parameters: */
- /* FITS_HDU_LIST *hl [I] : hdu list to delete */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static void fits_delete_hdulist (FITS_HDU_LIST *hl)
-
- {FITS_HDU_LIST *next;
-
- while (hl != NULL)
- {
- fits_delete_recordlist (hl->header_record_list);
- next = hl->next_hdu;
- hl->next_hdu = NULL;
- free ((char *)hl);
- hl = next;
- }
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_nan_32 - (local) check for IEEE NaN values (32 bit) */
- /* */
- /* Parameters: */
- /* unsigned char *v [I] : value to check */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function returns 1 if the value is a NaN. Otherwise 0 is returned. */
- /* The byte sequence at v must start with the sign/eponent byte. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static int fits_nan_32 (unsigned char *v)
-
- {register unsigned long k;
-
- k = (v[0] << 24) | (v[1] << 16) | (v[2] << 8) | v[3];
- k &= 0x7fffffff; /* Dont care about the sign bit */
-
- /* See NOST Definition of the Flexible Image Transport System (FITS), */
- /* Appendix F, IEEE special formats. */
- return ( ((k >= 0x7f7fffff) && (k <= 0x7fffffff))
- || ((k >= 0x00000001) && (k <= 0x00800000)));
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_nan_64 - (local) check for IEEE NaN values (64 bit) */
- /* */
- /* Parameters: */
- /* unsigned char *v [I] : value to check */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function returns 1 if the value is a NaN. Otherwise 0 is returned. */
- /* The byte sequence at v must start with the sign/eponent byte. */
- /* (currently we ignore the low order 4 bytes of the mantissa. Therefore */
- /* this function is the same as for 32 bits). */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static int fits_nan_64 (unsigned char *v)
-
- {register unsigned long k;
-
- k = (v[0] << 24) | (v[1] << 16) | (v[2] << 8) | v[3];
- k &= 0x7fffffff; /* Dont care about the sign bit */
-
- /* See NOST Definition of the Flexible Image Transport System (FITS), */
- /* Appendix F, IEEE special formats. */
- return ( ((k >= 0x7f7fffff) && (k <= 0x7fffffff))
- || ((k >= 0x00000001) && (k <= 0x00800000)));
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_get_error - get an error message */
- /* */
- /* Parameters: */
- /* -none- */
- /* */
- /* If an error message has been set, a pointer to the message is returned. */
- /* Otherwise a NULL pointer is returned. */
- /* An inquired error message is removed from the error FIFO. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- char *fits_get_error (void)
-
- {static char errmsg[FITS_ERROR_LENGTH];
- int k;
-
- if (fits_n_error <= 0) return (NULL);
- strcpy (errmsg, fits_error[0]);
-
- for (k = 1; k < fits_n_error; k++)
- strcpy (fits_error[k-1], fits_error[k]);
-
- fits_n_error--;
-
- return (errmsg);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_set_error - (local) set an error message */
- /* */
- /* Parameters: */
- /* char *errmsg [I] : Error message to set */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* Places the error message in the FIFO. If the FIFO is full, */
- /* the message is discarded. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static void fits_set_error (char *errmsg)
-
- {
- if (fits_n_error < FITS_MAX_ERROR)
- {
- strncpy (fits_error[fits_n_error], errmsg, FITS_ERROR_LENGTH);
- fits_error[fits_n_error++][FITS_ERROR_LENGTH-1] = '\0';
- }
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_drop_error - (local) remove an error message */
- /* */
- /* Parameters: */
- /* -none- */
- /* */
- /* Removes the last error message from the error message FIFO */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static void fits_drop_error (void)
-
- {
- if (fits_n_error > 0) fits_n_error--;
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_open - open a FITS file */
- /* */
- /* Parameters: */
- /* char *filename [I] : name of file to open */
- /* char *openmode [I] : mode to open the file ("r", "w") */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* On success, a FITS_FILE-pointer is returned. On failure, a NULL- */
- /* pointer is returned. */
- /* The functions scans through the file loading each header and analyzing */
- /* them. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- FITS_FILE *fits_open (char *filename, char *openmode)
-
- {int reading, writing, n_rec, n_hdr;
- long fpos_header, fpos_data;
- FILE *fp;
- FITS_FILE *ff;
- FITS_RECORD_LIST *hdrlist;
- FITS_HDU_LIST *hdulist, *last_hdulist;
-
- /* initialize */
-
- hdulist = NULL;
- last_hdulist = NULL;
-
- /* Check the IEEE-format we are running on */
- {float one32 = 1.0;
- double one64 = 1.0;
- unsigned char *op32 = (unsigned char *)&one32;
- unsigned char *op64 = (unsigned char *)&one64;
-
- if (sizeof (float) == 4)
- {
- fits_ieee32_intel = (op32[3] == 0x3f);
- fits_ieee32_motorola = (op32[0] == 0x3f);
- }
- if (sizeof (double) == 8)
- {
- fits_ieee64_intel = (op64[7] == 0x3f);
- fits_ieee64_motorola = (op64[0] == 0x3f);
- }
- }
-
- if ((filename == NULL) || (*filename == '\0') || (openmode == NULL))
- FITS_RETURN ("fits_open: Invalid parameters", NULL);
-
- reading = (strcmp (openmode, "r") == 0);
- writing = (strcmp (openmode, "w") == 0);
- if ((!reading) && (!writing))
- FITS_RETURN ("fits_open: Invalid openmode", NULL);
-
- fp = fopen (filename, reading ? "rb" : "wb");
- if (fp == NULL) FITS_RETURN ("fits_open: fopen() failed", NULL);
-
- ff = fits_new_filestruct ();
- if (ff == NULL)
- {
- fclose (fp);
- FITS_RETURN ("fits_open: No more memory", NULL);
- }
-
- ff->fp = fp;
- ff->openmode = *openmode;
-
- if (writing) return (ff);
-
- for (n_hdr = 0; ; n_hdr++) /* Read through all HDUs */
- {
- fpos_header = ftell (fp); /* Save file position of header */
- hdrlist = fits_read_header (fp, &n_rec);
-
- if (hdrlist == NULL)
- {
- if (n_hdr > 0) /* At least one header must be present. */
- fits_drop_error (); /* If we got a header already, drop the error */
- break;
- }
- fpos_data = ftell (fp); /* Save file position of data */
-
- /* Decode the header */
- hdulist = fits_decode_header (hdrlist, fpos_header, fpos_data);
- if (hdulist == NULL)
- {
- fits_delete_recordlist (hdrlist);
- break;
- }
- ff->n_hdu++;
- ff->n_pic += hdulist->numpic;
-
- if (hdulist->used.blank_value) ff->blank_used = 1;
- if (hdulist->used.nan_value) ff->nan_used = 1;
-
- if (n_hdr == 0)
- ff->hdu_list = hdulist;
- else
- last_hdulist->next_hdu = hdulist;
- last_hdulist = hdulist;
- /* Evaluate the range of pixel data */
- fits_eval_pixrange (fp, hdulist);
-
- /* Reposition to start of next header */
- if (fseek (fp, hdulist->data_offset+hdulist->data_size, SEEK_SET) < 0)
- break;
- }
-
- return (ff);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_close - close a FITS file */
- /* */
- /* Parameters: */
- /* FITS_FILE *ff [I] : FITS file pointer */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- void fits_close (FITS_FILE *ff)
-
- {
- if (ff == NULL) FITS_VRETURN ("fits_close: Invalid parameter");
-
- fclose (ff->fp);
-
- fits_delete_filestruct (ff);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_add_hdu - add a HDU to the file */
- /* */
- /* Parameters: */
- /* FITS_FILE *ff [I] : FITS file pointer */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* Adds a new HDU to the list kept in ff. A pointer to the new HDU is */
- /* returned. On failure, a NULL-pointer is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- FITS_HDU_LIST *fits_add_hdu (FITS_FILE *ff)
-
- {FITS_HDU_LIST *newhdu, *hdu;
-
- if (ff->openmode != 'w')
- FITS_RETURN ("fits_add_hdu: file not open for writing", NULL);
-
- newhdu = fits_new_hdulist ();
- if (newhdu == NULL) return (NULL);
-
- if (ff->hdu_list == NULL)
- {
- ff->hdu_list = newhdu;
- }
- else
- {
- hdu = ff->hdu_list;
- while (hdu->next_hdu != NULL)
- hdu = hdu->next_hdu;
- hdu->next_hdu = newhdu;
- }
-
- return (newhdu);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_add_card - add a card to the HDU */
- /* */
- /* Parameters: */
- /* FITS_HDU_LIST *hdulist [I] : HDU listr */
- /* char *card [I] : card to add */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The card must follow the standards of FITS. The card must not use a */
- /* keyword that is written using *hdulist itself. On success 0 is returned. */
- /* On failure -1 is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- int fits_add_card (FITS_HDU_LIST *hdulist, char *card)
-
- {int k;
-
- if (hdulist->naddcards >= FITS_NADD_CARDS) return (-1);
-
- k = strlen (card);
- if (k < FITS_CARD_SIZE)
- {
- memset (&(hdulist->addcards[hdulist->naddcards][k]), ' ', FITS_CARD_SIZE-k);
- memcpy (hdulist->addcards[(hdulist->naddcards)++], card, k);
- }
- else
- {
- memcpy (hdulist->addcards[(hdulist->naddcards)++], card, FITS_CARD_SIZE);
- }
- return (0);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_print_header - print the internal representation */
- /* of a single header */
- /* Parameters: */
- /* FITS_HDU_LIST *hdr [I] : pointer to the header */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- void fits_print_header (FITS_HDU_LIST *hdr)
-
- {int k;
-
- if (hdr->used.simple)
- printf ("Content of SIMPLE-header:\n");
- else
- printf ("Content of XTENSION-header %s:\n", hdr->xtension);
- printf ("header_offset : %ld\n", hdr->header_offset);
- printf ("data_offset : %ld\n", hdr->data_offset);
- printf ("data_size : %ld\n", hdr->data_size);
- printf ("used data_size: %ld\n", hdr->udata_size);
- printf ("bytes p.pixel : %d\n", hdr->bpp);
- printf ("pixmin : %f\n", hdr->pixmin);
- printf ("pixmax : %f\n", hdr->pixmax);
-
- printf ("naxis : %d\n", hdr->naxis);
- for (k = 1; k <= hdr->naxis; k++)
- printf ("naxis%-3d : %d\n", k, hdr->naxisn[k-1]);
-
- printf ("bitpix : %d\n", hdr->bitpix);
-
- if (hdr->used.blank)
- printf ("blank : %ld\n", hdr->blank);
- else
- printf ("blank : not used\n");
-
- if (hdr->used.datamin)
- printf ("datamin : %f\n", hdr->datamin);
- else
- printf ("datamin : not used\n");
- if (hdr->used.datamax)
- printf ("datamax : %f\n", hdr->datamax);
- else
- printf ("datamax : not used\n");
-
- if (hdr->used.gcount)
- printf ("gcount : %ld\n", hdr->gcount);
- else
- printf ("gcount : not used\n");
- if (hdr->used.pcount)
- printf ("pcount : %ld\n", hdr->pcount);
- else
- printf ("pcount : not used\n");
-
- if (hdr->used.bscale)
- printf ("bscale : %f\n", hdr->bscale);
- else
- printf ("bscale : not used\n");
- if (hdr->used.bzero)
- printf ("bzero : %f\n", hdr->bzero);
- else
- printf ("bzero : not used\n");
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_read_header - (local) read FITS header */
- /* */
- /* Parameters: */
- /* FILE *fp [I] : file pointer */
- /* int *nrec [O] : number of records read */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* Reads in all header records up to the record that keeps the END-card. */
- /* A pointer to the record list is returned on success. */
- /* On failure, a NULL-pointer is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static FITS_RECORD_LIST *fits_read_header (FILE *fp, int *nrec)
-
- {char record[FITS_RECORD_SIZE];
- FITS_RECORD_LIST *start_list = NULL, *cu_record = NULL, *new_record;
- FITS_DATA *fdat;
- int k, simple, xtension;
-
- *nrec = 0;
-
- k = fread (record, 1, FITS_RECORD_SIZE, fp);
- if (k != FITS_RECORD_SIZE)
- FITS_RETURN ("fits_read_header: Error in read of first record", NULL);
-
- simple = (strncmp (record, "SIMPLE ", 8) == 0);
- xtension = (strncmp (record, "XTENSION", 8) == 0);
- if ((!simple) && (!xtension))
- FITS_RETURN ("fits_read_header: Missing keyword SIMPLE or XTENSION", NULL);
-
- if (simple)
- {
- fdat = fits_decode_card (record, typ_fbool);
- if (fdat && !fdat->fbool)
- fits_set_error ("fits_read_header (warning): keyword SIMPLE does not have\
- value T");
- }
-
- for (;;) /* Process all header records */
- {
- new_record = (FITS_RECORD_LIST *)malloc (sizeof (FITS_RECORD_LIST));
- if (new_record == NULL)
- {
- fits_delete_recordlist (start_list);
- FITS_RETURN ("fits_read_header: Not enough memory", NULL);
- }
- memcpy (new_record->data, record, FITS_RECORD_SIZE);
- new_record->next_record = NULL;
- (*nrec)++;
-
- if (start_list == NULL) /* Add new record to the list */
- start_list = new_record;
- else
- cu_record->next_record = new_record;
-
- cu_record = new_record;
- /* Was this the last record ? */
- if (fits_search_card (cu_record, "END") != NULL) break;
-
- k = fread (record, 1, FITS_RECORD_SIZE, fp);
- if (k != FITS_RECORD_SIZE)
- FITS_RETURN ("fits_read_header: Error in read of record", NULL);
- }
- return (start_list);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_write_header - write a FITS header */
- /* */
- /* Parameters: */
- /* FITS_FILE *ff [I] : FITS-file pointer */
- /* FITS_HDU_LIST [I] : pointer to header */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* Writes a header to the file. On success, 0 is returned. On failure, */
- /* -1 is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- int fits_write_header (FITS_FILE *ff, FITS_HDU_LIST *hdulist)
-
- {int numcards;
- int k;
-
- if (ff->openmode != 'w')
- FITS_RETURN ("fits_write_header: file not open for writing", -1);
-
- numcards = 0;
-
- if (hdulist->used.simple)
- {
- FITS_WRITE_BOOLCARD (ff->fp, "SIMPLE", 1);
- numcards++;
- }
- else if (hdulist->used.xtension)
- {
- FITS_WRITE_STRINGCARD (ff->fp, "XTENSION", hdulist->xtension);
- numcards++;
- }
-
- FITS_WRITE_LONGCARD (ff->fp, "BITPIX", hdulist->bitpix);
- numcards++;
-
- FITS_WRITE_LONGCARD (ff->fp, "NAXIS", hdulist->naxis);
- numcards++;
-
- for (k = 0; k < hdulist->naxis; k++)
- {char naxisn[10];
- sprintf (naxisn, "NAXIS%d", k+1);
- FITS_WRITE_LONGCARD (ff->fp, naxisn, hdulist->naxisn[k]);
- numcards++;
- }
-
- if (hdulist->used.extend)
- {
- FITS_WRITE_BOOLCARD (ff->fp, "EXTEND", hdulist->extend);
- numcards++;
- }
-
- if (hdulist->used.groups)
- {
- FITS_WRITE_BOOLCARD (ff->fp, "GROUPS", hdulist->groups);
- numcards++;
- }
-
- if (hdulist->used.pcount)
- {
- FITS_WRITE_LONGCARD (ff->fp, "PCOUNT", hdulist->pcount);
- numcards++;
- }
- if (hdulist->used.gcount)
- {
- FITS_WRITE_LONGCARD (ff->fp, "GCOUNT", hdulist->gcount);
- numcards++;
- }
-
- if (hdulist->used.bzero)
- {
- FITS_WRITE_DOUBLECARD (ff->fp, "BZERO", hdulist->bzero);
- numcards++;
- }
- if (hdulist->used.bscale)
- {
- FITS_WRITE_DOUBLECARD (ff->fp, "BSCALE", hdulist->bscale);
- numcards++;
- }
-
- if (hdulist->used.datamin)
- {
- FITS_WRITE_DOUBLECARD (ff->fp, "DATAMIN", hdulist->datamin);
- numcards++;
- }
- if (hdulist->used.datamax)
- {
- FITS_WRITE_DOUBLECARD (ff->fp, "DATAMAX", hdulist->datamax);
- numcards++;
- }
-
- if (hdulist->used.blank)
- {
- FITS_WRITE_LONGCARD (ff->fp, "BLANK", hdulist->blank);
- numcards++;
- }
-
- /* Write additional cards */
- if (hdulist->naddcards > 0)
- {
- fwrite (hdulist->addcards, FITS_CARD_SIZE, hdulist->naddcards, ff->fp);
- numcards += hdulist->naddcards;
- }
-
- FITS_WRITE_CARD (ff->fp, "END");
- numcards++;
-
- k = (numcards*FITS_CARD_SIZE) % FITS_RECORD_SIZE;
- if (k) /* Must the record be filled up ? */
- {
- while (k++ < FITS_RECORD_SIZE)
- putc (' ', ff->fp);
- }
-
- return (ferror (ff->fp) ? -1 : 0);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_decode_header - (local) decode a header */
- /* */
- /* Parameters: */
- /* FITS_RECORD_LIST *hdr [I] : the header record list */
- /* long hdr_offset [I] : fileposition of header */
- /* long dat_offset [I] : fileposition of data (end of header) */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function decodes the mostly used data within the header and generates */
- /* a FITS_HDU_LIST-entry. On failure, a NULL-pointer is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static FITS_HDU_LIST *fits_decode_header (FITS_RECORD_LIST *hdr,
- long hdr_offset, long dat_offset)
-
- {FITS_HDU_LIST *hdulist;
- FITS_DATA *fdat;
- char errmsg[80], key[9];
- int k, bpp, random_groups;
- long mul_axis, data_size, bitpix_supported;
-
- #define FITS_DECODE_CARD(mhdr,mkey,mfdat,mtyp) \
- {strcpy (key, mkey); \
- mfdat = fits_decode_card (fits_search_card (mhdr, mkey), mtyp); \
- if (mfdat == NULL) goto err_missing; }
-
- #define FITS_TRY_CARD(mhdr,mhdu,mkey,mvar,mtyp,unionvar) \
- {FITS_DATA *mfdat = fits_decode_card (fits_search_card (mhdr,mkey), mtyp); \
- mhdu->used.mvar = (mfdat != NULL); \
- if (mhdu->used.mvar) mhdu->mvar = mfdat->unionvar; }
-
- hdulist = fits_new_hdulist ();
- if (hdulist == NULL)
- FITS_RETURN ("fits_decode_header: Not enough memory", NULL);
-
- /* Initialize the header data */
- hdulist->header_offset = hdr_offset;
- hdulist->data_offset = dat_offset;
-
- hdulist->used.simple = (strncmp (hdr->data, "SIMPLE ", 8) == 0);
- hdulist->used.xtension = (strncmp (hdr->data, "XTENSION", 8) == 0);
- if (hdulist->used.xtension)
- {
- fdat = fits_decode_card (fits_search_card (hdr, "XTENSION"), typ_fstring);
- strcpy (hdulist->xtension, fdat->fstring);
- }
-
- FITS_DECODE_CARD (hdr, "NAXIS", fdat, typ_flong);
- hdulist->naxis = fdat->flong;
-
- FITS_DECODE_CARD (hdr, "BITPIX", fdat, typ_flong);
- bpp = hdulist->bitpix = (int)fdat->flong;
- if ( (bpp != 8) && (bpp != 16) && (bpp != 32)
- && (bpp != -32) && (bpp != -64))
- {
- strcpy (errmsg, "fits_decode_header: Invalid BITPIX-value");
- goto err_return;
- }
- if (bpp < 0) bpp = -bpp;
- bpp /= 8;
- hdulist->bpp = bpp;
-
- FITS_TRY_CARD (hdr, hdulist, "GCOUNT", gcount, typ_flong, flong);
- FITS_TRY_CARD (hdr, hdulist, "PCOUNT", pcount, typ_flong, flong);
-
- FITS_TRY_CARD (hdr, hdulist, "GROUPS", groups, typ_fbool, fbool);
- random_groups = hdulist->used.groups && hdulist->groups;
-
- FITS_TRY_CARD (hdr, hdulist, "EXTEND", extend, typ_fbool, fbool);
-
- if (hdulist->used.xtension) /* Extension requires GCOUNT and PCOUNT */
- {
- if ((!hdulist->used.gcount) || (!hdulist->used.pcount))
- {
- strcpy (errmsg, "fits_decode_header: Missing GCOUNT/PCOUNT for XTENSION");
- goto err_return;
- }
- }
-
- mul_axis = 1;
-
- /* Find all NAXISx-cards */
- for (k = 1; k <= FITS_MAX_AXIS; k++)
- {char naxisn[9];
-
- sprintf (naxisn, "NAXIS%-3d", k);
- fdat = fits_decode_card (fits_search_card (hdr, naxisn), typ_flong);
- if (fdat == NULL)
- {
- k--; /* Save the last NAXISk read */
- break;
- }
- hdulist->naxisn[k-1] = (int)fdat->flong;
- if (hdulist->naxisn[k-1] < 0)
- {
- strcpy (errmsg, "fits_decode_header: Negative value in NAXISn");
- goto err_return;
- }
- if ((k == 1) && (random_groups))
- {
- if (hdulist->naxisn[0] != 0)
- {
- strcpy (errmsg, "fits_decode_header: Random groups with NAXIS1 != 0");
- goto err_return;
- }
- }
- else
- mul_axis *= hdulist->naxisn[k-1];
- }
-
- if ((hdulist->naxis > 0) && (k < hdulist->naxis))
- {
- strcpy (errmsg, "fits_decode_card: Not enough NAXISn-cards");
- goto err_return;
- }
-
- /* If we have only one dimension, just set the second to size one. */
- /* So we dont have to check for naxis < 2 in some places. */
- if (hdulist->naxis < 2)
- hdulist->naxisn[1] = 1;
- if (hdulist->naxis < 1)
- {
- mul_axis = 0;
- hdulist->naxisn[0] = 1;
- }
-
- if (hdulist->used.xtension)
- data_size = bpp*hdulist->gcount*(hdulist->pcount + mul_axis);
- else
- data_size = bpp*mul_axis;
- hdulist->udata_size = data_size; /* Used data size without padding */
-
- /* Datasize must be a multiple of the FITS logical record size */
- data_size = (data_size + FITS_RECORD_SIZE - 1) / FITS_RECORD_SIZE;
- data_size *= FITS_RECORD_SIZE;
- hdulist->data_size = data_size;
-
-
- FITS_TRY_CARD (hdr, hdulist, "BLANK", blank, typ_flong, flong);
-
- FITS_TRY_CARD (hdr, hdulist, "DATAMIN", datamin, typ_fdouble, fdouble);
- FITS_TRY_CARD (hdr, hdulist, "DATAMAX", datamax, typ_fdouble, fdouble);
-
- FITS_TRY_CARD (hdr, hdulist, "BZERO", bzero, typ_fdouble, fdouble);
- FITS_TRY_CARD (hdr, hdulist, "BSCALE", bscale, typ_fdouble, fdouble);
-
- /* Evaluate number of interpretable images for this HDU */
- hdulist->numpic = 0;
-
- /* We must support this format */
- bitpix_supported = (hdulist->bitpix > 0)
- || ( (hdulist->bitpix == -64)
- && (fits_ieee64_intel || fits_ieee64_motorola))
- || ( (hdulist->bitpix == -32)
- && ( fits_ieee32_intel || fits_ieee32_motorola
- || fits_ieee64_intel || fits_ieee64_motorola));
-
- if (bitpix_supported)
- {
- if (hdulist->used.simple)
- {
- if (hdulist->naxis > 0)
- {
- hdulist->numpic = 1;
- for (k = 3; k <= hdulist->naxis; k++)
- hdulist->numpic *= hdulist->naxisn[k-1];
- }
- }
- else if ( hdulist->used.xtension
- && (strncmp (hdulist->xtension, "IMAGE", 5) == 0))
- {
- if (hdulist->naxis > 0)
- {
- hdulist->numpic = 1;
- for (k = 3; k <= hdulist->naxis; k++)
- hdulist->numpic *= hdulist->naxisn[k-1];
- }
- }
- }
- else
- {char msg[160];
- sprintf (msg, "fits_decode_header: IEEE floating point format required for\
- BITPIX=%d\nis not supported on this machine", hdulist->bitpix);
- fits_set_error (msg);
- }
-
- hdulist->header_record_list = hdr; /* Add header records to the list */
- return (hdulist);
-
- err_missing:
- sprintf (errmsg, "fits_decode_header: missing/invalid %s card", key);
-
- err_return:
- fits_delete_hdulist (hdulist);
- fits_set_error (errmsg);
- return (NULL);
-
- #undef FITS_DECODE_CARD
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_eval_pixrange - (local) evaluate range of pixel data */
- /* */
- /* Parameters: */
- /* FILE *fp [I] : file pointer */
- /* FITS_HDU_LIST *hdu [I] : pointer to header */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The Function sets the values hdu->pixmin and hdu->pixmax. On success 0 */
- /* is returned. On failure, -1 is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- static int fits_eval_pixrange (FILE *fp, FITS_HDU_LIST *hdu)
-
- {register int maxelem;
- #define FITSNPIX 4096
- unsigned char pixdat[FITSNPIX];
- int nelem, bpp;
- int blank_found = 0, nan_found = 0;
-
- if (fseek (fp, hdu->data_offset, SEEK_SET) < 0)
- FITS_RETURN ("fits_eval_pixrange: cant position file", -1);
-
- bpp = hdu->bpp; /* Number of bytes per pixel */
- nelem = hdu->udata_size / bpp; /* Number of data elements */
-
- switch (hdu->bitpix)
- {
- case 8: {
- register FITS_BITPIX8 pixval;
- register unsigned char *ptr;
- FITS_BITPIX8 minval = 255, maxval = 0;
- FITS_BITPIX8 blankval;
-
- while (nelem > 0)
- {
- maxelem = sizeof (pixdat)/bpp;
- if (nelem < maxelem) maxelem = nelem;
- nelem -= maxelem;
- if (fread ((char *)pixdat, bpp, maxelem, fp) != maxelem)
- FITS_RETURN ("fits_eval_pixrange: error on read bitpix 8 data", -1);
-
- ptr = pixdat;
- if (hdu->used.blank)
- {
- blankval = (FITS_BITPIX8)hdu->blank;
- while (maxelem-- > 0)
- {
- pixval = (FITS_BITPIX8)*(ptr++);
- if (pixval != blankval)
- {
- if (pixval < minval) minval = pixval;
- else if (pixval > maxval) maxval = pixval;
- }
- else blank_found = 1;
- }
- }
- else
- {
- while (maxelem-- > 0)
- {
- pixval = (FITS_BITPIX8)*(ptr++);
- if (pixval < minval) minval = pixval;
- else if (pixval > maxval) maxval = pixval;
- }
- }
- }
- hdu->pixmin = minval;
- hdu->pixmax = maxval;
- break; }
-
- case 16: {
- register FITS_BITPIX16 pixval;
- register unsigned char *ptr;
- FITS_BITPIX16 minval = 0x7fff, maxval = ~0x7fff;
-
- while (nelem > 0)
- {
- maxelem = sizeof (pixdat)/bpp;
- if (nelem < maxelem) maxelem = nelem;
- nelem -= maxelem;
- if (fread ((char *)pixdat, bpp, maxelem, fp) != maxelem)
- FITS_RETURN ("fits_eval_pixrange: error on read bitpix 16 data", -1);
-
- ptr = pixdat;
- if (hdu->used.blank)
- {FITS_BITPIX16 blankval = (FITS_BITPIX16)hdu->blank;
-
- while (maxelem-- > 0)
- {
- FITS_GETBITPIX16 (ptr, pixval);
- ptr += 2;
- if (pixval != blankval)
- {
- if (pixval < minval) minval = pixval;
- else if (pixval > maxval) maxval = pixval;
- }
- else blank_found = 1;
- }
- }
- else
- {
- while (maxelem-- > 0)
- {
- FITS_GETBITPIX16 (ptr, pixval);
- ptr += 2;
- if (pixval < minval) minval = pixval;
- else if (pixval > maxval) maxval = pixval;
- }
- }
- }
- hdu->pixmin = minval;
- hdu->pixmax = maxval;
- break; }
-
-
- case 32: {
- register FITS_BITPIX32 pixval;
- register unsigned char *ptr;
- FITS_BITPIX32 minval = 0x7fffffff, maxval = ~0x7fffffff;
-
- while (nelem > 0)
- {
- maxelem = sizeof (pixdat)/bpp;
- if (nelem < maxelem) maxelem = nelem;
- nelem -= maxelem;
- if (fread ((char *)pixdat, bpp, maxelem, fp) != maxelem)
- FITS_RETURN ("fits_eval_pixrange: error on read bitpix 32 data", -1);
-
- ptr = pixdat;
- if (hdu->used.blank)
- {FITS_BITPIX32 blankval = (FITS_BITPIX32)hdu->blank;
-
- while (maxelem-- > 0)
- {
- FITS_GETBITPIX32 (ptr, pixval);
- ptr += 4;
- if (pixval != blankval)
- {
- if (pixval < minval) minval = pixval;
- else if (pixval > maxval) maxval = pixval;
- }
- else blank_found = 1;
- }
- }
- else
- {
- while (maxelem-- > 0)
- {
- FITS_GETBITPIX32 (ptr, pixval);
- ptr += 4;
- if (pixval < minval) minval = pixval;
- else if (pixval > maxval) maxval = pixval;
- }
- }
- }
- hdu->pixmin = minval;
- hdu->pixmax = maxval;
- break; }
-
- case -32: {
- register FITS_BITPIXM32 pixval;
- register unsigned char *ptr;
- FITS_BITPIXM32 minval, maxval;
- int first = 1;
-
- /* initialize */
-
- pixval = 0;
- minval = 0;
- maxval = 0;
-
- while (nelem > 0)
- {
- maxelem = sizeof (pixdat)/bpp;
- if (nelem < maxelem) maxelem = nelem;
- nelem -= maxelem;
- if (fread ((char *)pixdat, bpp, maxelem, fp) != maxelem)
- FITS_RETURN ("fits_eval_pixrange: error on read bitpix -32 data", -1);
-
- ptr = pixdat;
- while (maxelem-- > 0)
- {
- if (!fits_nan_32 (ptr))
- {
- FITS_GETBITPIXM32 (ptr, pixval);
- ptr += 4;
- if (first)
- {
- first = 0;
- minval = maxval = pixval;
- }
- else if (pixval < minval) { minval = pixval; }
- else if (pixval > maxval) { maxval = pixval; }
- }
- else nan_found = 1;
- }
- }
- hdu->pixmin = minval;
- hdu->pixmax = maxval;
- break; }
-
- case -64: {
- register FITS_BITPIXM64 pixval;
- register unsigned char *ptr;
- FITS_BITPIXM64 minval, maxval;
- int first = 1;
-
- /* initialize */
-
- minval = 0;
- maxval = 0;
-
- while (nelem > 0)
- {
- maxelem = sizeof (pixdat)/bpp;
- if (nelem < maxelem) maxelem = nelem;
- nelem -= maxelem;
- if (fread ((char *)pixdat, bpp, maxelem, fp) != maxelem)
- FITS_RETURN ("fits_eval_pixrange: error on read bitpix -64 data", -1);
-
- ptr = pixdat;
- while (maxelem-- > 0)
- {
- if (!fits_nan_64 (ptr))
- {
- FITS_GETBITPIXM64 (ptr, pixval);
- ptr += 8;
- if (first)
- {
- first = 0;
- minval = maxval = pixval;
- }
- else if (pixval < minval) { minval = pixval; }
- else if (pixval > maxval) { maxval = pixval; }
- }
- else nan_found = 1;
- }
- }
- hdu->pixmin = minval;
- hdu->pixmax = maxval;
- break; }
- }
- if (nan_found) hdu->used.nan_value = 1;
- if (blank_found) hdu->used.blank_value = 1;
-
- return (0);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_decode_card - decode a card */
- /* */
- /* Parameters: */
- /* const char *card [I] : pointer to card image */
- /* FITS_DATA_TYPES data_type [I] : datatype to decode */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* Decodes a card and returns a pointer to the union, keeping the data. */
- /* If card is NULL or on failure, a NULL-pointer is returned. */
- /* If the card does not have the value indicator, an error is generated, */
- /* but its tried to decode the card. The data is only valid up to the next */
- /* call of the function. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- FITS_DATA *fits_decode_card (const char *card, FITS_DATA_TYPES data_type)
-
- {static FITS_DATA data;
- long l_long;
- double l_double;
- char l_card[FITS_CARD_SIZE+1], msg[256];
- char *cp = ident, *dst, *end;
-
- if (card == NULL) return (NULL);
-
- memcpy (l_card, card, FITS_CARD_SIZE);
- l_card[FITS_CARD_SIZE] = '\0';
-
- if (strncmp (card+8, "= ", 2) != 0)
- {
- sprintf (msg, "fits_decode_card (warning): Missing value indicator\
- '= ' for %8.8s", l_card);
- fits_set_error (msg);
- }
-
- switch (data_type)
- {
- case typ_bitpix8:
- data.bitpix8 = (FITS_BITPIX8)(l_card[10]);
- break;
-
- case typ_bitpix16:
- if (sscanf (l_card+10, "%ld", &l_long) != 1)
- FITS_RETURN ("fits_decode_card: error decoding typ_bitpix16", NULL);
- data.bitpix16 = (FITS_BITPIX16)l_long;
- break;
-
- case typ_bitpix32:
- if (sscanf (l_card+10, "%ld", &l_long) != 1)
- FITS_RETURN ("fits_decode_card: error decoding typ_bitpix32", NULL);
- data.bitpix32 = (FITS_BITPIX32)l_long;
- break;
-
- case typ_bitpixm32:
- if (sscanf (l_card+10, "%lf", &l_double) != 1)
- FITS_RETURN ("fits_decode_card: error decoding typ_bitpixm32", NULL);
- data.bitpixm32 = (FITS_BITPIXM32)l_double;
- break;
-
- case typ_bitpixm64:
- if (sscanf (l_card+10, "%lf", &l_double) != 1)
- FITS_RETURN ("fits_decode_card: error decoding typ_bitpixm64", NULL);
- data.bitpixm64 = (FITS_BITPIXM64)l_double;
- break;
-
- case typ_fbool:
- cp = l_card+10;
- while (*cp == ' ') cp++;
- if (*cp == 'T') data.fbool = 1;
- else if (*cp == 'F') data.fbool = 0;
- else FITS_RETURN ("fits_decode_card: error decoding typ_fbool", NULL);
- break;
-
- case typ_flong:
- if (sscanf (l_card+10, "%ld", &l_long) != 1)
- FITS_RETURN ("fits_decode_card: error decoding typ_flong", NULL);
- data.flong = (FITS_BITPIX32)l_long;
- break;
-
- case typ_fdouble:
- if (sscanf (l_card+10, "%lf", &l_double) != 1)
- FITS_RETURN ("fits_decode_card: error decoding typ_fdouble", NULL);
- data.fdouble = (FITS_BITPIXM32)l_double;
- break;
-
- case typ_fstring:
- cp = l_card+10;
- if (*cp != '\'')
- FITS_RETURN ("fits_decode_card: missing \' decoding typ_fstring", NULL);
-
- dst = data.fstring;
- cp++;
- end = l_card+FITS_CARD_SIZE-1;
- for (;;) /* Search for trailing quote */
- {
- if (*cp != '\'') /* All characters but quote are used. */
- {
- *(dst++) = *cp;
- }
- else /* Maybe there is a quote in the string */
- {
- if (cp >= end) break; /* End of card ? finished */
- if (*(cp+1) != '\'') break;
- *(dst++) = *(cp++);
- }
- if (cp >= end) break;
- cp++;
- }
- *dst = '\0';
- break;
- }
- return (&data);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_search_card - search a card in the record list */
- /* */
- /* Parameters: */
- /* FITS_RECORD_LIST *rl [I] : record list to search */
- /* char *keyword [I] : keyword identifying the card */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* A card is searched in the reord list. Only the first eight characters of */
- /* keyword are significant. If keyword is less than 8 characters, its filled */
- /* with blanks. */
- /* If the card is found, a pointer to the card is returned. */
- /* The pointer does not point to a null-terminated string. Only the next */
- /* 80 bytes are allowed to be read. */
- /* On failure a NULL-pointer is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- char *fits_search_card (FITS_RECORD_LIST *rl, char *keyword)
-
- {int key_len, k;
- char *card;
- char key[9];
-
- key_len = strlen (keyword);
- if (key_len > 8) key_len = 8;
- if (key_len == 0)
- FITS_RETURN ("fits_search_card: Invalid parameter", NULL);
-
- strcpy (key, " ");
- memcpy (key, keyword, key_len);
-
- while (rl != NULL)
- {
- card = (char *)rl->data;
- for (k = 0; k < FITS_RECORD_SIZE / FITS_CARD_SIZE; k++)
- {
- if (strncmp (card, key, 8) == 0) return (card);
- card += FITS_CARD_SIZE;
- }
- rl = rl->next_record;
- }
- return (NULL);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_image_info - get information about an image */
- /* */
- /* Parameters: */
- /* FITS_FILE *ff [I] : FITS file structure */
- /* int picind [I] : Index of picture in file (1,2,...) */
- /* int *hdupicind [O] : Index of picture in HDU (1,2,...) */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function returns on success a pointer to a FITS_HDU_LIST. hdupicind */
- /* then gives the index of the image within the HDU. */
- /* On failure, NULL is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- FITS_HDU_LIST *fits_image_info (FITS_FILE *ff, int picind, int *hdupicind)
-
- {FITS_HDU_LIST *hdulist;
- int firstpic, lastpic;
-
- if (ff == NULL)
- FITS_RETURN ("fits_image_info: ff is NULL", NULL);
-
- if (ff->openmode != 'r')
- FITS_RETURN ("fits_image_info: file not open for reading", NULL);
-
- if ((picind < 1) || (picind > ff->n_pic))
- FITS_RETURN ("fits_image_info: picind out of range", NULL);
-
- firstpic = 1;
- for (hdulist = ff->hdu_list; hdulist != NULL; hdulist = hdulist->next_hdu)
- {
- if (hdulist->numpic <= 0) continue;
- lastpic = firstpic+hdulist->numpic-1;
- if (picind <= lastpic) /* Found image in current HDU ? */
- break;
-
- firstpic = lastpic+1;
- }
- *hdupicind = picind - firstpic + 1;
- return (hdulist);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_seek_image - position to a specific image */
- /* */
- /* Parameters: */
- /* FITS_FILE *ff [I] : FITS file structure */
- /* int picind [I] : Index of picture to seek (1,2,...) */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function positions the file pointer to a specified image. */
- /* The function returns on success a pointer to a FITS_HDU_LIST. This pointer*/
- /* must also be used when reading data from the image. */
- /* On failure, NULL is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- FITS_HDU_LIST *fits_seek_image (FITS_FILE *ff, int picind)
-
- {FITS_HDU_LIST *hdulist;
- int hdupicind;
- long offset, pic_size;
-
- hdulist = fits_image_info (ff, picind, &hdupicind);
- if (hdulist == NULL) return (NULL);
-
- pic_size = hdulist->bpp * hdulist->naxisn[0] * hdulist->naxisn[1];
- offset = hdulist->data_offset + (hdupicind-1)*pic_size;
- if (fseek (ff->fp, offset, SEEK_SET) < 0)
- FITS_RETURN ("fits_seek_image: Unable to position to image", NULL);
-
- return (hdulist);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_read_pixel - read pixel values from a file */
- /* */
- /* Parameters: */
- /* FITS_FILE *ff [I] : FITS file structure */
- /* FITS_HDU_LIST *hdulist [I] : pointer to hdulist that describes image */
- /* int npix [I] : number of pixel values to read */
- /* FITS_PIX_TRANSFORM *trans [I]: pixel transformation */
- /* void *buf [O] : buffer where to place transformed pixels */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function reads npix pixel values from the file, transforms them */
- /* checking for blank/NaN pixels and stores the transformed values in buf. */
- /* The number of transformed pixels is returned. If the returned value is */
- /* less than npix (or even -1), an error has occured. */
- /* hdulist must be a pointer returned by fits_seek_image(). Before starting */
- /* to read an image, fits_seek_image() must be called. Even for successive */
- /* images. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- int fits_read_pixel (FITS_FILE *ff, FITS_HDU_LIST *hdulist, int npix,
- FITS_PIX_TRANSFORM *trans, void *buf)
-
- {double offs, scale;
- double datadiff, pixdiff;
- unsigned char pixbuffer[4096], *pix, *cdata;
- unsigned char creplace;
- int transcount = 0;
- long tdata, tmin, tmax;
- int maxelem;
- FITS_BITPIX8 bp8, bp8blank;
- FITS_BITPIX16 bp16, bp16blank;
- FITS_BITPIX32 bp32, bp32blank;
- FITS_BITPIXM32 bpm32;
- FITS_BITPIXM64 bpm64;
-
- /* initialize */
-
- bpm32 = 0;
-
- if (ff->openmode != 'r') return (-1); /* Not open for reading */
- if (trans->dsttyp != 'c') return (-1); /* Currently we only return chars */
- if (npix <= 0) return (npix);
-
- datadiff = trans->datamax - trans->datamin;
- pixdiff = trans->pixmax - trans->pixmin;
-
- offs = trans->datamin - trans->pixmin*datadiff/pixdiff;
- scale = datadiff / pixdiff;
-
- tmin = (long)trans->datamin;
- tmax = (long)trans->datamax;
- if (tmin < 0) tmin = 0; else if (tmin > 255) tmin = 255;
- if (tmax < 0) tmax = 0; else if (tmax > 255) tmax = 255;
-
- cdata = (unsigned char *)buf;
- creplace = (unsigned char)trans->replacement;
-
- switch (hdulist->bitpix)
- {
- case 8:
- while (npix > 0) /* For all pixels to read */
- {
- maxelem = sizeof (pixbuffer) / hdulist->bpp;
- if (maxelem > npix) maxelem = npix;
- if (fread ((char *)pixbuffer, hdulist->bpp, maxelem, ff->fp) != maxelem)
- return (-1);
- npix -= maxelem;
-
- pix = pixbuffer;
- if (hdulist->used.blank)
- {
- bp8blank = (FITS_BITPIX8)hdulist->blank;
- while (maxelem--)
- {
- bp8 = (FITS_BITPIX8)*(pix++);
- if (bp8 == bp8blank) /* Is it a blank pixel ? */
- *(cdata++) = creplace;
- else /* Do transform */
- {
- tdata = (long)(bp8 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- }
- transcount++;
- }
- }
- else
- {
- while (maxelem--)
- {
- bp8 = (FITS_BITPIX8)*(pix++);
- tdata = (long)(bp8 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- transcount++;
- }
- }
- }
- break;
-
- case 16:
- while (npix > 0) /* For all pixels to read */
- {
- maxelem = sizeof (pixbuffer) / hdulist->bpp;
- if (maxelem > npix) maxelem = npix;
- if (fread ((char *)pixbuffer, hdulist->bpp, maxelem, ff->fp) != maxelem)
- return (-1);
- npix -= maxelem;
-
- pix = pixbuffer;
- if (hdulist->used.blank)
- {
- bp16blank = (FITS_BITPIX16)hdulist->blank;
- while (maxelem--)
- {
- FITS_GETBITPIX16 (pix, bp16);
- if (bp16 == bp16blank)
- *(cdata++) = creplace;
- else
- {
- tdata = (long)(bp16 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- }
- transcount++;
- pix += 2;
- }
- }
- else
- {
- while (maxelem--)
- {
- FITS_GETBITPIX16 (pix, bp16);
- tdata = (long)(bp16 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- transcount++;
- pix += 2;
- }
- }
- }
- break;
-
- case 32:
- while (npix > 0) /* For all pixels to read */
- {
- maxelem = sizeof (pixbuffer) / hdulist->bpp;
- if (maxelem > npix) maxelem = npix;
- if (fread ((char *)pixbuffer, hdulist->bpp, maxelem, ff->fp) != maxelem)
- return (-1);
- npix -= maxelem;
-
- pix = pixbuffer;
- if (hdulist->used.blank)
- {
- bp32blank = (FITS_BITPIX32)hdulist->blank;
- while (maxelem--)
- {
- FITS_GETBITPIX32 (pix, bp32);
- if (bp32 == bp32blank)
- *(cdata++) = creplace;
- else
- {
- tdata = (long)(bp32 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- }
- transcount++;
- pix += 4;
- }
- }
- else
- {
- while (maxelem--)
- {
- FITS_GETBITPIX32 (pix, bp32);
- tdata = (long)(bp32 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- transcount++;
- pix += 4;
- }
- }
- }
- break;
-
- case -32:
- while (npix > 0) /* For all pixels to read */
- {
- maxelem = sizeof (pixbuffer) / hdulist->bpp;
- if (maxelem > npix) maxelem = npix;
- if (fread ((char *)pixbuffer, hdulist->bpp, maxelem, ff->fp) != maxelem)
- return (-1);
- npix -= maxelem;
-
- pix = pixbuffer;
- while (maxelem--)
- {
- if (fits_nan_32 (pix)) /* An IEEE special value ? */
- *(cdata++) = creplace;
- else /* Do transform */
- {
- FITS_GETBITPIXM32 (pix, bpm32);
- tdata = (long)(bpm32 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- }
- transcount++;
- pix += 4;
- }
- }
- break;
-
- case -64:
- while (npix > 0) /* For all pixels to read */
- {
- maxelem = sizeof (pixbuffer) / hdulist->bpp;
- if (maxelem > npix) maxelem = npix;
- if (fread ((char *)pixbuffer, hdulist->bpp, maxelem, ff->fp) != maxelem)
- return (-1);
- npix -= maxelem;
-
- pix = pixbuffer;
- while (maxelem--)
- {
- if (fits_nan_64 (pix))
- *(cdata++) = creplace;
- else
- {
- FITS_GETBITPIXM64 (pix, bpm64);
- tdata = (long)(bpm64 * scale + offs);
- if (tdata < tmin) tdata = tmin;
- else if (tdata > tmax) tdata = tmax;
- *(cdata++) = (unsigned char)tdata;
- }
- transcount++;
- pix += 8;
- }
- }
- break;
- }
- return (transcount);
- }
-
-
- #ifndef FITS_NO_DEMO
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : fits_to_pgmraw - convert FITS-file to raw PGM-file */
- /* */
- /* Parameters: */
- /* char *fitsfile [I] : name of fitsfile */
- /* char *pgmfile [I] : name of pgmfile */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function converts a FITS-file to a raw PGM-file. The PGM-file will */
- /* be upside down, because the orientation for storing the image is */
- /* different. On success, 0 is returned. On failure, -1 is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- int fits_to_pgmraw (char *fitsfile, char *pgmfile)
-
- {FITS_FILE *fitsin = NULL;
- FILE *pgmout = NULL;
- FITS_HDU_LIST *hdu;
- FITS_PIX_TRANSFORM trans;
- int retval = -1, nbytes, maxbytes;
- char buffer[1024];
-
- fitsin = fits_open (fitsfile, "r"); /* Open FITS-file for reading */
- if (fitsin == NULL) goto err_return;
-
- if (fitsin->n_pic < 1) goto err_return; /* Any picture in it ? */
-
- hdu = fits_seek_image (fitsin, 1); /* Position to the first image */
- if (hdu == NULL) goto err_return;
- if (hdu->naxis < 2) goto err_return; /* Enough dimensions ? */
-
- pgmout = fopen (pgmfile, "wb");
- if (pgmout == NULL) goto err_return;
-
- /* Write PGM header with width/height */
- fprintf (pgmout, "P5\n%d %d\n255\n", hdu->naxisn[0], hdu->naxisn[1]);
-
- /* Set up transformation for FITS pixel values to 0...255 */
- /* It maps trans.pixmin to trans.datamin and trans.pixmax to trans.datamax. */
- /* Values out of range [datamin, datamax] are clamped */
- trans.pixmin = hdu->pixmin;
- trans.pixmax = hdu->pixmax;
- trans.datamin = 0.0;
- trans.datamax = 255.0;
- trans.replacement = 0.0; /* Blank/NaN replacement value */
- trans.dsttyp = 'c'; /* Output type is character */
-
- nbytes = hdu->naxisn[0]*hdu->naxisn[1];
- while (nbytes > 0)
- {
- maxbytes = sizeof (buffer);
- if (maxbytes > nbytes) maxbytes = nbytes;
-
- /* Read pixels and transform them */
- if (fits_read_pixel (fitsin, hdu, maxbytes, &trans, buffer) != maxbytes)
- goto err_return;
-
- if (fwrite (buffer, 1, maxbytes, pgmout) != maxbytes)
- goto err_return;
-
- nbytes -= maxbytes;
- }
- retval = 0;
-
- err_return:
-
- if (fitsin) fits_close (fitsin);
- if (pgmout) fclose (pgmout);
-
- return (retval);
- }
-
-
- /*****************************************************************************/
- /* #BEG-PAR */
- /* */
- /* Function : pgmraw to fits - convert raw PGM-file to FITS-file */
- /* */
- /* Parameters: */
- /* char *pgmfile [I] : name of pgmfile */
- /* char *fitsfile [I] : name of fitsfile */
- /* ( mode : I=input, O=output, I/O=input/output ) */
- /* */
- /* The function converts a raw PGM-file to a FITS-file. The FITS-file will */
- /* be upside down, because the orientation for storing the image is */
- /* different. On success, 0 is returned. On failure, -1 is returned. */
- /* */
- /* #END-PAR */
- /*****************************************************************************/
-
- int pgmraw_to_fits (char *pgmfile, char *fitsfile)
-
- {FITS_FILE *fitsout = NULL;
- FILE *pgmin = NULL;
- FITS_HDU_LIST *hdu;
- char buffer[1024];
- int width, height, numbytes, maxbytes;
- int retval = -1;
-
- fitsout = fits_open (fitsfile, "w");
- if (fitsout == NULL) goto err_return;
-
- pgmin = fopen (pgmfile, "r");
- if (pgmin == NULL) goto err_return;
-
- /* Read signature of PGM file */
- if (fgets (buffer, sizeof (buffer), pgmin) == NULL) goto err_return;
- if ((buffer[0] != 'P') || (buffer[1] != '5')) goto err_return;
-
- /* Skip comments upto width/height */
- do
- {
- if (fgets (buffer, sizeof (buffer), pgmin) == NULL) goto err_return;
- } while (buffer[0] == '#');
-
- if (sscanf (buffer, "%d%d", &width, &height) != 2) goto err_return;
- if ((width < 1) || (height < 1)) goto err_return;
-
- /* Skip comments upto maxval */
- do
- {
- if (fgets (buffer, sizeof (buffer), pgmin) == NULL) goto err_return;
- } while (buffer[0] == '#');
- /* Ignore maxval */
-
- hdu = fits_add_hdu (fitsout); /* Create a HDU for the FITS file */
- if (hdu == NULL) goto err_return;
-
- hdu->used.simple = 1; /* Set proper values */
- hdu->bitpix = 8;
- hdu->naxis = 2;
- hdu->naxisn[0] = width;
- hdu->naxisn[1] = height;
- hdu->used.datamin = 1;
- hdu->datamin = 0.0;
- hdu->used.datamax = 1;
- hdu->datamax = 255.0;
- hdu->used.bzero = 1;
- hdu->bzero = 0.0;
- hdu->used.bscale = 1;
- hdu->bscale = 1.0;
-
- fits_add_card (hdu, "");
- fits_add_card (hdu, "HISTORY THIS FITS FILE WAS GENERATED BY FITSRW\
- USING PGMRAW_TO_FITS");
-
- /* Write the header. Blocking is done automatically */
- if (fits_write_header (fitsout, hdu) < 0) goto err_return;
-
- /* The primary array plus blocking must be written manually */
- numbytes = width * height;
-
- while (numbytes > 0)
- {
- maxbytes = sizeof (buffer);
- if (maxbytes > numbytes) maxbytes = numbytes;
-
- if (fread (buffer, 1, maxbytes, pgmin) != maxbytes) goto err_return;
- if (fwrite (buffer, 1, maxbytes, fitsout->fp) != maxbytes) goto err_return;
-
- numbytes -= maxbytes;
- }
-
- /* Do blocking */
- numbytes = (width * height) % FITS_RECORD_SIZE;
- if (numbytes)
- {
- while (numbytes++ < FITS_RECORD_SIZE)
- if (putc (0, fitsout->fp) == EOF) goto err_return;
- }
- retval = 0;
-
- err_return:
-
- if (fitsout) fits_close (fitsout);
- if (pgmin) fclose (pgmin);
-
- return (retval);
- }
-
- #endif
-