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iraffits.c
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iraffits.c
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/*------------------------------------------------------------------------*/
/* */
/* These routines have been modified by William Pence for use by CFITSIO */
/* The original files were provided by Doug Mink */
/*------------------------------------------------------------------------*/
/* File imhfile.c
* August 6, 1998
* By Doug Mink, based on Mike VanHilst's readiraf.c
* Module: imhfile.c (IRAF .imh image file reading and writing)
* Purpose: Read and write IRAF image files (and translate headers)
* Subroutine: irafrhead (filename, lfhead, fitsheader, lihead)
* Read IRAF image header
* Subroutine: irafrimage (fitsheader)
* Read IRAF image pixels (call after irafrhead)
* Subroutine: same_path (pixname, hdrname)
* Put filename and header path together
* Subroutine: iraf2fits (hdrname, irafheader, nbiraf, nbfits)
* Convert IRAF image header to FITS image header
* Subroutine: irafgeti4 (irafheader, offset)
* Get 4-byte integer from arbitrary part of IRAF header
* Subroutine: irafgetc2 (irafheader, offset)
* Get character string from arbitrary part of IRAF v.1 header
* Subroutine: irafgetc (irafheader, offset)
* Get character string from arbitrary part of IRAF header
* Subroutine: iraf2str (irafstring, nchar)
* Convert 2-byte/char IRAF string to 1-byte/char string
* Subroutine: irafswap (bitpix,string,nbytes)
* Swap bytes in string in place, with FITS bits/pixel code
* Subroutine: irafswap2 (string,nbytes)
* Swap bytes in string in place
* Subroutine irafswap4 (string,nbytes)
* Reverse bytes of Integer*4 or Real*4 vector in place
* Subroutine irafswap8 (string,nbytes)
* Reverse bytes of Real*8 vector in place
* Copyright: 2000 Smithsonian Astrophysical Observatory
* You may do anything you like with this file except remove
* this copyright. The Smithsonian Astrophysical Observatory
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#include "fitsio2.h"
#include <stdio.h> /* define stderr, FD, and NULL */
#include <stdlib.h>
#include <stddef.h> /* stddef.h is apparently needed to define size_t */
#include <string.h>
#define FILE_NOT_OPENED 104
/* Parameters from iraf/lib/imhdr.h for IRAF version 1 images */
#define SZ_IMPIXFILE 79 /* name of pixel storage file */
#define SZ_IMHDRFILE 79 /* length of header storage file */
#define SZ_IMTITLE 79 /* image title string */
#define LEN_IMHDR 2052 /* length of std header */
/* Parameters from iraf/lib/imhdr.h for IRAF version 2 images */
#define SZ_IM2PIXFILE 255 /* name of pixel storage file */
#define SZ_IM2HDRFILE 255 /* name of header storage file */
#define SZ_IM2TITLE 383 /* image title string */
#define LEN_IM2HDR 2046 /* length of std header */
/* Offsets into header in bytes for parameters in IRAF version 1 images */
#define IM_HDRLEN 12 /* Length of header in 4-byte ints */
#define IM_PIXTYPE 16 /* Datatype of the pixels */
#define IM_NDIM 20 /* Number of dimensions */
#define IM_LEN 24 /* Length (as stored) */
#define IM_PHYSLEN 52 /* Physical length (as stored) */
#define IM_PIXOFF 88 /* Offset of the pixels */
#define IM_CTIME 108 /* Time of image creation */
#define IM_MTIME 112 /* Time of last modification */
#define IM_LIMTIME 116 /* Time of min,max computation */
#define IM_MAX 120 /* Maximum pixel value */
#define IM_MIN 124 /* Maximum pixel value */
#define IM_PIXFILE 412 /* Name of pixel storage file */
#define IM_HDRFILE 572 /* Name of header storage file */
#define IM_TITLE 732 /* Image name string */
/* Offsets into header in bytes for parameters in IRAF version 2 images */
#define IM2_HDRLEN 6 /* Length of header in 4-byte ints */
#define IM2_PIXTYPE 10 /* Datatype of the pixels */
#define IM2_SWAPPED 14 /* Pixels are byte swapped */
#define IM2_NDIM 18 /* Number of dimensions */
#define IM2_LEN 22 /* Length (as stored) */
#define IM2_PHYSLEN 50 /* Physical length (as stored) */
#define IM2_PIXOFF 86 /* Offset of the pixels */
#define IM2_CTIME 106 /* Time of image creation */
#define IM2_MTIME 110 /* Time of last modification */
#define IM2_LIMTIME 114 /* Time of min,max computation */
#define IM2_MAX 118 /* Maximum pixel value */
#define IM2_MIN 122 /* Maximum pixel value */
#define IM2_PIXFILE 126 /* Name of pixel storage file */
#define IM2_HDRFILE 382 /* Name of header storage file */
#define IM2_TITLE 638 /* Image name string */
/* Codes from iraf/unix/hlib/iraf.h */
#define TY_CHAR 2
#define TY_SHORT 3
#define TY_INT 4
#define TY_LONG 5
#define TY_REAL 6
#define TY_DOUBLE 7
#define TY_COMPLEX 8
#define TY_POINTER 9
#define TY_STRUCT 10
#define TY_USHORT 11
#define TY_UBYTE 12
#define LEN_PIXHDR 1024
#define MAXINT 2147483647 /* Biggest number that can fit in long */
static int isirafswapped(char *irafheader, int offset);
static int irafgeti4(char *irafheader, int offset);
static char *irafgetc2(char *irafheader, int offset, int nc);
static char *irafgetc(char *irafheader, int offset, int nc);
static char *iraf2str(char *irafstring, int nchar);
static char *irafrdhead(const char *filename, int *lihead);
static int irafrdimage (char **buffptr, size_t *buffsize,
size_t *filesize, int *status);
static int iraftofits (char *hdrname, char *irafheader, int nbiraf,
char **buffptr, size_t *nbfits, size_t *fitssize, int *status);
static char *same_path(char *pixname, const char *hdrname);
static int swaphead=0; /* =1 to swap data bytes of IRAF header values */
static int swapdata=0; /* =1 to swap bytes in IRAF data pixels */
static void irafswap(int bitpix, char *string, int nbytes);
static void irafswap2(char *string, int nbytes);
static void irafswap4(char *string, int nbytes);
static void irafswap8(char *string, int nbytes);
static int pix_version (char *irafheader);
static int irafncmp (char *irafheader, char *teststring, int nc);
static int machswap(void);
static int head_version (char *irafheader);
static int hgeti4(char* hstring, char* keyword, int* val);
static int hgets(char* hstring, char* keyword, int lstr, char* string);
static char* hgetc(char* hstring, char* keyword);
static char* ksearch(char* hstring, char* keyword);
static char *blsearch (char* hstring, char* keyword);
static char *strsrch (char* s1, char* s2);
static char *strnsrch ( char* s1,char* s2,int ls1);
static void hputi4(char* hstring,char* keyword, int ival);
static void hputs(char* hstring,char* keyword,char* cval);
static void hputcom(char* hstring,char* keyword,char* comment);
static void hputl(char* hstring,char* keyword,int lval);
static void hputc(char* hstring,char* keyword,char* cval);
static int getirafpixname (const char *hdrname, char *irafheader, char *pixfilename, int *status);
int iraf2mem(char *filename, char **buffptr, size_t *buffsize,
size_t *filesize, int *status);
void ffpmsg(const char *err_message);
/* CFITS_API is defined below for use on Windows systems. */
/* It is used to identify the public functions which should be exported. */
/* This has no effect on non-windows platforms where "WIN32" is not defined */
/* this is only needed to export the "fits_delete_iraf_file" symbol, which */
/* is called in fpackutil.c (and perhaps in other applications programs) */
#if defined (WIN32)
#if defined(cfitsio_EXPORTS)
#define CFITS_API __declspec(dllexport)
#else
#define CFITS_API //__declspec(dllimport)
#endif /* CFITS_API */
#else /* defined (WIN32) */
#define CFITS_API
#endif
int CFITS_API fits_delete_iraf_file(const char *filename, int *status);
/*--------------------------------------------------------------------------*/
int fits_delete_iraf_file(const char *filename, /* name of input file */
int *status) /* IO - error status */
/*
Delete the iraf .imh header file and the associated .pix data file
*/
{
char *irafheader;
int lenirafhead;
char pixfilename[SZ_IM2PIXFILE+1];
/* read IRAF header into dynamically created char array (free it later!) */
irafheader = irafrdhead(filename, &lenirafhead);
if (!irafheader)
{
return(*status = FILE_NOT_OPENED);
}
getirafpixname (filename, irafheader, pixfilename, status);
/* don't need the IRAF header any more */
free(irafheader);
if (*status > 0)
return(*status);
remove(filename);
remove(pixfilename);
return(*status);
}
/*--------------------------------------------------------------------------*/
int iraf2mem(char *filename, /* name of input file */
char **buffptr, /* O - memory pointer (initially NULL) */
size_t *buffsize, /* O - size of mem buffer, in bytes */
size_t *filesize, /* O - size of FITS file, in bytes */
int *status) /* IO - error status */
/*
Driver routine that reads an IRAF image into memory, also converting
it into FITS format.
*/
{
char *irafheader;
int lenirafhead;
*buffptr = NULL;
*buffsize = 0;
*filesize = 0;
/* read IRAF header into dynamically created char array (free it later!) */
irafheader = irafrdhead(filename, &lenirafhead);
if (!irafheader)
{
return(*status = FILE_NOT_OPENED);
}
/* convert IRAF header to FITS header in memory */
iraftofits(filename, irafheader, lenirafhead, buffptr, buffsize, filesize,
status);
/* don't need the IRAF header any more */
free(irafheader);
if (*status > 0)
return(*status);
*filesize = (((*filesize - 1) / 2880 ) + 1 ) * 2880; /* multiple of 2880 */
/* append the image data onto the FITS header */
irafrdimage(buffptr, buffsize, filesize, status);
return(*status);
}
/*--------------------------------------------------------------------------*/
/* Subroutine: irafrdhead (was irafrhead in D. Mink's original code)
* Purpose: Open and read the iraf .imh file.
* Returns: NULL if failure, else pointer to IRAF .imh image header
* Notes: The imhdr format is defined in iraf/lib/imhdr.h, some of
* which defines or mimicked, above.
*/
static char *irafrdhead (
const char *filename, /* Name of IRAF header file */
int *lihead) /* Length of IRAF image header in bytes (returned) */
{
FILE *fd;
int nbr;
char *irafheader;
char errmsg[FLEN_ERRMSG];
long nbhead;
int nihead;
*lihead = 0;
/* open the image header file */
fd = fopen (filename, "rb");
if (fd == NULL) {
ffpmsg("unable to open IRAF header file:");
ffpmsg(filename);
return (NULL);
}
/* Find size of image header file */
if (fseek(fd, 0, 2) != 0) /* move to end of the file */
{
ffpmsg("IRAFRHEAD: cannot seek in file:");
ffpmsg(filename);
return(NULL);
}
nbhead = ftell(fd); /* position = size of file */
if (nbhead < 0)
{
ffpmsg("IRAFRHEAD: cannot get pos. in file:");
ffpmsg(filename);
return(NULL);
}
if (fseek(fd, 0, 0) != 0) /* move back to beginning */
{
ffpmsg("IRAFRHEAD: cannot seek to beginning of file:");
ffpmsg(filename);
return(NULL);
}
/* allocate initial sized buffer */
nihead = nbhead + 5000;
irafheader = (char *) calloc (1, nihead);
if (irafheader == NULL) {
snprintf(errmsg, FLEN_ERRMSG,"IRAFRHEAD Cannot allocate %d-byte header",
nihead);
ffpmsg(errmsg);
ffpmsg(filename);
return (NULL);
}
*lihead = nihead;
/* Read IRAF header */
nbr = fread (irafheader, 1, nbhead, fd);
fclose (fd);
/* Reject if header less than minimum length */
if (nbr < LEN_PIXHDR) {
snprintf(errmsg, FLEN_ERRMSG,"IRAFRHEAD header file: %d / %d bytes read.",
nbr,LEN_PIXHDR);
ffpmsg(errmsg);
ffpmsg(filename);
free (irafheader);
return (NULL);
}
return (irafheader);
}
/*--------------------------------------------------------------------------*/
static int irafrdimage (
char **buffptr, /* FITS image header (filled) */
size_t *buffsize, /* allocated size of the buffer */
size_t *filesize, /* actual size of the FITS file */
int *status)
{
FILE *fd;
char *bang;
int nax = 1, naxis1 = 1, naxis2 = 1, naxis3 = 1, naxis4 = 1, npaxis1 = 1, npaxis2;
int bitpix, bytepix, i;
char *fitsheader, *image;
int nbr, nbimage, nbaxis, nbl, nbdiff;
char *pixheader;
char *linebuff;
int imhver, lpixhead = 0;
char pixname[SZ_IM2PIXFILE+1];
char errmsg[FLEN_ERRMSG];
size_t newfilesize;
fitsheader = *buffptr; /* pointer to start of header */
/* Convert pixel file name to character string */
hgets (fitsheader, "PIXFILE", SZ_IM2PIXFILE, pixname);
hgeti4 (fitsheader, "PIXOFF", &lpixhead);
/* Open pixel file, ignoring machine name if present */
if ((bang = strchr (pixname, '!')) != NULL )
fd = fopen (bang + 1, "rb");
else
fd = fopen (pixname, "rb");
/* Print error message and exit if pixel file is not found */
if (!fd) {
ffpmsg("IRAFRIMAGE: Cannot open IRAF pixel file:");
ffpmsg(pixname);
return (*status = FILE_NOT_OPENED);
}
/* Read pixel header */
pixheader = (char *) calloc (lpixhead, 1);
if (pixheader == NULL) {
ffpmsg("IRAFRIMAGE: Cannot alloc memory for pixel header");
ffpmsg(pixname);
fclose (fd);
return (*status = FILE_NOT_OPENED);
}
nbr = fread (pixheader, 1, lpixhead, fd);
/* Check size of pixel header */
if (nbr < lpixhead) {
snprintf(errmsg, FLEN_ERRMSG,"IRAF pixel file: %d / %d bytes read.",
nbr,LEN_PIXHDR);
ffpmsg(errmsg);
free (pixheader);
fclose (fd);
return (*status = FILE_NOT_OPENED);
}
/* check pixel header magic word */
imhver = pix_version (pixheader);
if (imhver < 1) {
ffpmsg("File not valid IRAF pixel file:");
ffpmsg(pixname);
free (pixheader);
fclose (fd);
return (*status = FILE_NOT_OPENED);
}
free (pixheader);
/* Find number of bytes to read */
hgeti4 (fitsheader,"NAXIS",&nax);
hgeti4 (fitsheader,"NAXIS1",&naxis1);
hgeti4 (fitsheader,"NPAXIS1",&npaxis1);
if (nax > 1) {
hgeti4 (fitsheader,"NAXIS2",&naxis2);
hgeti4 (fitsheader,"NPAXIS2",&npaxis2);
}
if (nax > 2)
hgeti4 (fitsheader,"NAXIS3",&naxis3);
if (nax > 3)
hgeti4 (fitsheader,"NAXIS4",&naxis4);
hgeti4 (fitsheader,"BITPIX",&bitpix);
if (bitpix < 0)
bytepix = -bitpix / 8;
else
bytepix = bitpix / 8;
nbimage = naxis1 * naxis2 * naxis3 * naxis4 * bytepix;
newfilesize = *filesize + nbimage; /* header + data */
newfilesize = (((newfilesize - 1) / 2880 ) + 1 ) * 2880;
if (newfilesize > *buffsize) /* need to allocate more memory? */
{
fitsheader = (char *) realloc (*buffptr, newfilesize);
if (fitsheader == NULL) {
snprintf(errmsg, FLEN_ERRMSG,"IRAFRIMAGE Cannot allocate %d-byte image buffer",
(int) (*filesize));
ffpmsg(errmsg);
ffpmsg(pixname);
fclose (fd);
return (*status = FILE_NOT_OPENED);
}
}
*buffptr = fitsheader;
*buffsize = newfilesize;
image = fitsheader + *filesize;
*filesize = newfilesize;
/* Read IRAF image all at once if physical and image dimensions are the same */
if (npaxis1 == naxis1)
nbr = fread (image, 1, nbimage, fd);
/* Read IRAF image one line at a time if physical and image dimensions differ */
else {
nbdiff = (npaxis1 - naxis1) * bytepix;
nbaxis = naxis1 * bytepix;
linebuff = image;
nbr = 0;
if (naxis2 == 1 && naxis3 > 1)
naxis2 = naxis3;
for (i = 0; i < naxis2; i++) {
nbl = fread (linebuff, 1, nbaxis, fd);
nbr = nbr + nbl;
fseek (fd, nbdiff, 1);
linebuff = linebuff + nbaxis;
}
}
fclose (fd);
/* Check size of image */
if (nbr < nbimage) {
snprintf(errmsg, FLEN_ERRMSG,"IRAF pixel file: %d / %d bytes read.",
nbr,nbimage);
ffpmsg(errmsg);
ffpmsg(pixname);
return (*status = FILE_NOT_OPENED);
}
/* Byte-reverse image, if necessary */
if (swapdata)
irafswap (bitpix, image, nbimage);
return (*status);
}
/*--------------------------------------------------------------------------*/
/* Return IRAF image format version number from magic word in IRAF header*/
static int head_version (
char *irafheader) /* IRAF image header from file */
{
/* Check header file magic word */
if (irafncmp (irafheader, "imhdr", 5) != 0 ) {
if (strncmp (irafheader, "imhv2", 5) != 0)
return (0);
else
return (2);
}
else
return (1);
}
/*--------------------------------------------------------------------------*/
/* Return IRAF image format version number from magic word in IRAF pixel file */
static int pix_version (
char *irafheader) /* IRAF image header from file */
{
/* Check pixel file header magic word */
if (irafncmp (irafheader, "impix", 5) != 0) {
if (strncmp (irafheader, "impv2", 5) != 0)
return (0);
else
return (2);
}
else
return (1);
}
/*--------------------------------------------------------------------------*/
/* Verify that file is valid IRAF imhdr or impix by checking first 5 chars
* Returns: 0 on success, 1 on failure */
static int irafncmp (
char *irafheader, /* IRAF image header from file */
char *teststring, /* C character string to compare */
int nc) /* Number of characters to compate */
{
char *line;
if ((line = iraf2str (irafheader, nc)) == NULL)
return (1);
if (strncmp (line, teststring, nc) == 0) {
free (line);
return (0);
}
else {
free (line);
return (1);
}
}
/*--------------------------------------------------------------------------*/
/* Convert IRAF image header to FITS image header, returning FITS header */
static int iraftofits (
char *hdrname, /* IRAF header file name (may be path) */
char *irafheader, /* IRAF image header */
int nbiraf, /* Number of bytes in IRAF header */
char **buffptr, /* pointer to the FITS header */
size_t *nbfits, /* allocated size of the FITS header buffer */
size_t *fitssize, /* Number of bytes in FITS header (returned) */
/* = number of bytes to the end of the END keyword */
int *status)
{
char *objname; /* object name from FITS file */
int lstr, i, j, k, ib, nax, nbits;
char *pixname, *newpixname, *bang, *chead;
char *fitsheader;
int nblock, nlines;
char *fhead, *fhead1, *fp, endline[81];
char irafchar;
char fitsline[81];
int pixtype;
int imhver, n, imu, pixoff, impixoff;
/* int immax, immin, imtime; */
int imndim, imlen, imphyslen, impixtype;
char errmsg[FLEN_ERRMSG];
/* Set up last line of FITS header */
(void)strncpy (endline,"END", 3);
for (i = 3; i < 80; i++)
endline[i] = ' ';
endline[80] = 0;
/* Check header magic word */
imhver = head_version (irafheader);
if (imhver < 1) {
ffpmsg("File not valid IRAF image header");
ffpmsg(hdrname);
return(*status = FILE_NOT_OPENED);
}
if (imhver == 2) {
nlines = 24 + ((nbiraf - LEN_IM2HDR) / 81);
imndim = IM2_NDIM;
imlen = IM2_LEN;
imphyslen = IM2_PHYSLEN;
impixtype = IM2_PIXTYPE;
impixoff = IM2_PIXOFF;
/* imtime = IM2_MTIME; */
/* immax = IM2_MAX; */
/* immin = IM2_MIN; */
}
else {
nlines = 24 + ((nbiraf - LEN_IMHDR) / 162);
imndim = IM_NDIM;
imlen = IM_LEN;
imphyslen = IM_PHYSLEN;
impixtype = IM_PIXTYPE;
impixoff = IM_PIXOFF;
/* imtime = IM_MTIME; */
/* immax = IM_MAX; */
/* immin = IM_MIN; */
}
/* Initialize FITS header */
nblock = (nlines * 80) / 2880;
*nbfits = (nblock + 5) * 2880 + 4;
fitsheader = (char *) calloc (*nbfits, 1);
if (fitsheader == NULL) {
snprintf(errmsg, FLEN_ERRMSG,"IRAF2FITS Cannot allocate %d-byte FITS header",
(int) (*nbfits));
ffpmsg(hdrname);
return (*status = FILE_NOT_OPENED);
}
fhead = fitsheader;
*buffptr = fitsheader;
(void)strncpy (fitsheader, endline, 80);
hputl (fitsheader, "SIMPLE", 1);
fhead = fhead + 80;
/* check if the IRAF file is in big endian (sun) format (= 0) or not. */
/* This is done by checking the 4 byte integer in the header that */
/* represents the iraf pixel type. This 4-byte word is guaranteed to */
/* have the least sig byte != 0 and the most sig byte = 0, so if the */
/* first byte of the word != 0, then the file in little endian format */
/* like on an Alpha machine. */
swaphead = isirafswapped(irafheader, impixtype);
if (imhver == 1)
swapdata = swaphead; /* vers 1 data has same swapness as header */
else
swapdata = irafgeti4 (irafheader, IM2_SWAPPED);
/* Set pixel size in FITS header */
pixtype = irafgeti4 (irafheader, impixtype);
switch (pixtype) {
case TY_CHAR:
nbits = 8;
break;
case TY_UBYTE:
nbits = 8;
break;
case TY_SHORT:
nbits = 16;
break;
case TY_USHORT:
nbits = -16;
break;
case TY_INT:
case TY_LONG:
nbits = 32;
break;
case TY_REAL:
nbits = -32;
break;
case TY_DOUBLE:
nbits = -64;
break;
default:
snprintf(errmsg,FLEN_ERRMSG,"Unsupported IRAF data type: %d", pixtype);
ffpmsg(errmsg);
ffpmsg(hdrname);
return (*status = FILE_NOT_OPENED);
}
hputi4 (fitsheader,"BITPIX",nbits);
hputcom (fitsheader,"BITPIX", "IRAF .imh pixel type");
fhead = fhead + 80;
/* Set image dimensions in FITS header */
nax = irafgeti4 (irafheader, imndim);
hputi4 (fitsheader,"NAXIS",nax);
hputcom (fitsheader,"NAXIS", "IRAF .imh naxis");
fhead = fhead + 80;
n = irafgeti4 (irafheader, imlen);
hputi4 (fitsheader, "NAXIS1", n);
hputcom (fitsheader,"NAXIS1", "IRAF .imh image naxis[1]");
fhead = fhead + 80;
if (nax > 1) {
n = irafgeti4 (irafheader, imlen+4);
hputi4 (fitsheader, "NAXIS2", n);
hputcom (fitsheader,"NAXIS2", "IRAF .imh image naxis[2]");
fhead = fhead + 80;
}
if (nax > 2) {
n = irafgeti4 (irafheader, imlen+8);
hputi4 (fitsheader, "NAXIS3", n);
hputcom (fitsheader,"NAXIS3", "IRAF .imh image naxis[3]");
fhead = fhead + 80;
}
if (nax > 3) {
n = irafgeti4 (irafheader, imlen+12);
hputi4 (fitsheader, "NAXIS4", n);
hputcom (fitsheader,"NAXIS4", "IRAF .imh image naxis[4]");
fhead = fhead + 80;
}
/* Set object name in FITS header */
if (imhver == 2)
objname = irafgetc (irafheader, IM2_TITLE, SZ_IM2TITLE);
else
objname = irafgetc2 (irafheader, IM_TITLE, SZ_IMTITLE);
if ((lstr = strlen (objname)) < 8) {
for (i = lstr; i < 8; i++)
objname[i] = ' ';
objname[8] = 0;
}
hputs (fitsheader,"OBJECT",objname);
hputcom (fitsheader,"OBJECT", "IRAF .imh title");
free (objname);
fhead = fhead + 80;
/* Save physical axis lengths so image file can be read */
n = irafgeti4 (irafheader, imphyslen);
hputi4 (fitsheader, "NPAXIS1", n);
hputcom (fitsheader,"NPAXIS1", "IRAF .imh physical naxis[1]");
fhead = fhead + 80;
if (nax > 1) {
n = irafgeti4 (irafheader, imphyslen+4);
hputi4 (fitsheader, "NPAXIS2", n);
hputcom (fitsheader,"NPAXIS2", "IRAF .imh physical naxis[2]");
fhead = fhead + 80;
}
if (nax > 2) {
n = irafgeti4 (irafheader, imphyslen+8);
hputi4 (fitsheader, "NPAXIS3", n);
hputcom (fitsheader,"NPAXIS3", "IRAF .imh physical naxis[3]");
fhead = fhead + 80;
}
if (nax > 3) {
n = irafgeti4 (irafheader, imphyslen+12);
hputi4 (fitsheader, "NPAXIS4", n);
hputcom (fitsheader,"NPAXIS4", "IRAF .imh physical naxis[4]");
fhead = fhead + 80;
}
/* Save image header filename in header */
hputs (fitsheader,"IMHFILE",hdrname);
hputcom (fitsheader,"IMHFILE", "IRAF header file name");
fhead = fhead + 80;
/* Save image pixel file pathname in header */
if (imhver == 2)
pixname = irafgetc (irafheader, IM2_PIXFILE, SZ_IM2PIXFILE);
else
pixname = irafgetc2 (irafheader, IM_PIXFILE, SZ_IMPIXFILE);
if (strncmp(pixname, "HDR", 3) == 0 ) {
newpixname = same_path (pixname, hdrname);
if (newpixname) {
free (pixname);
pixname = newpixname;
}
}
if (strchr (pixname, '/') == NULL && strchr (pixname, '$') == NULL) {
newpixname = same_path (pixname, hdrname);
if (newpixname) {
free (pixname);
pixname = newpixname;
}
}
if ((bang = strchr (pixname, '!')) != NULL )
hputs (fitsheader,"PIXFILE",bang+1);
else
hputs (fitsheader,"PIXFILE",pixname);
free (pixname);
hputcom (fitsheader,"PIXFILE", "IRAF .pix pixel file");
fhead = fhead + 80;
/* Save image offset from star of pixel file */
pixoff = irafgeti4 (irafheader, impixoff);
pixoff = (pixoff - 1) * 2;
hputi4 (fitsheader, "PIXOFF", pixoff);
hputcom (fitsheader,"PIXOFF", "IRAF .pix pixel offset (Do not change!)");
fhead = fhead + 80;
/* Save IRAF file format version in header */
hputi4 (fitsheader,"IMHVER",imhver);
hputcom (fitsheader,"IMHVER", "IRAF .imh format version (1 or 2)");
fhead = fhead + 80;
/* Save flag as to whether to swap IRAF data for this file and machine */
if (swapdata)
hputl (fitsheader, "PIXSWAP", 1);
else
hputl (fitsheader, "PIXSWAP", 0);
hputcom (fitsheader,"PIXSWAP", "IRAF pixels, FITS byte orders differ if T");
fhead = fhead + 80;
/* Add user portion of IRAF header to FITS header */
fitsline[80] = 0;
if (imhver == 2) {
imu = LEN_IM2HDR;
chead = irafheader;
j = 0;
for (k = 0; k < 80; k++)
fitsline[k] = ' ';
for (i = imu; i < nbiraf; i++) {
irafchar = chead[i];
if (irafchar == 0)
break;
else if (irafchar == 10) {
(void)strncpy (fhead, fitsline, 80);
/* fprintf (stderr,"%80s\n",fitsline); */
if (strncmp (fitsline, "OBJECT ", 7) != 0) {
fhead = fhead + 80;
}
for (k = 0; k < 80; k++)
fitsline[k] = ' ';
j = 0;
}
else {
if (j > 80) {
if (strncmp (fitsline, "OBJECT ", 7) != 0) {
(void)strncpy (fhead, fitsline, 80);
/* fprintf (stderr,"%80s\n",fitsline); */
j = 9;
fhead = fhead + 80;
}
for (k = 0; k < 80; k++)
fitsline[k] = ' ';
}
if (irafchar > 32 && irafchar < 127)
fitsline[j] = irafchar;
j++;
}
}
}
else {
imu = LEN_IMHDR;
chead = irafheader;
if (swaphead == 1)
ib = 0;
else
ib = 1;
for (k = 0; k < 80; k++)
fitsline[k] = ' ';
j = 0;
for (i = imu; i < nbiraf; i=i+2) {
irafchar = chead[i+ib];
if (irafchar == 0)
break;
else if (irafchar == 10) {
if (strncmp (fitsline, "OBJECT ", 7) != 0) {
(void)strncpy (fhead, fitsline, 80);
fhead = fhead + 80;
}
/* fprintf (stderr,"%80s\n",fitsline); */
j = 0;
for (k = 0; k < 80; k++)
fitsline[k] = ' ';
}
else {
if (j > 80) {
if (strncmp (fitsline, "OBJECT ", 7) != 0) {
(void)strncpy (fhead, fitsline, 80);
j = 9;
fhead = fhead + 80;
}
/* fprintf (stderr,"%80s\n",fitsline); */
for (k = 0; k < 80; k++)
fitsline[k] = ' ';
}
if (irafchar > 32 && irafchar < 127)
fitsline[j] = irafchar;
j++;
}
}
}
/* Add END to last line */
(void)strncpy (fhead, endline, 80);
/* Find end of last 2880-byte block of header */
fhead = ksearch (fitsheader, "END") + 80;
nblock = *nbfits / 2880;
fhead1 = fitsheader + (nblock * 2880);
*fitssize = fhead - fitsheader; /* no. of bytes to end of END keyword */
/* Pad rest of header with spaces */
strncpy (endline," ",3);
for (fp = fhead; fp < fhead1; fp = fp + 80) {
(void)strncpy (fp, endline,80);
}
return (*status);
}
/*--------------------------------------------------------------------------*/
/* get the IRAF pixel file name */
static int getirafpixname (
const char *hdrname, /* IRAF header file name (may be path) */
char *irafheader, /* IRAF image header */
char *pixfilename, /* IRAF pixel file name */
int *status)
{
int imhver;
char *pixname, *newpixname, *bang;
/* Check header magic word */
imhver = head_version (irafheader);
if (imhver < 1) {
ffpmsg("File not valid IRAF image header");
ffpmsg(hdrname);
return(*status = FILE_NOT_OPENED);
}
/* get image pixel file pathname in header */
if (imhver == 2)
pixname = irafgetc (irafheader, IM2_PIXFILE, SZ_IM2PIXFILE);
else
pixname = irafgetc2 (irafheader, IM_PIXFILE, SZ_IMPIXFILE);
if (strncmp(pixname, "HDR", 3) == 0 ) {
newpixname = same_path (pixname, hdrname);
if (newpixname) {
free (pixname);
pixname = newpixname;
}
}
if (strchr (pixname, '/') == NULL && strchr (pixname, '$') == NULL) {
newpixname = same_path (pixname, hdrname);
if (newpixname) {
free (pixname);
pixname = newpixname;
}
}
if ((bang = strchr (pixname, '!')) != NULL )
strcpy(pixfilename,bang+1);
else
strcpy(pixfilename,pixname);
free (pixname);
return (*status);
}
/*--------------------------------------------------------------------------*/
/* Put filename and header path together */
static char *same_path (
char *pixname, /* IRAF pixel file pathname */
const char *hdrname) /* IRAF image header file pathname */
{
int len;
char *newpixname;
/* WDP - 10/16/2007 - increased allocation to avoid possible overflow */
/* newpixname = (char *) calloc (SZ_IM2PIXFILE, sizeof (char)); */
newpixname = (char *) calloc (2*SZ_IM2PIXFILE+1, sizeof (char));
if (newpixname == NULL) {
ffpmsg("iraffits same_path: Cannot alloc memory for newpixname");
return (NULL);
}
/* Pixel file is in same directory as header */
if (strncmp(pixname, "HDR$", 4) == 0 ) {
(void)strncpy (newpixname, hdrname, SZ_IM2PIXFILE);
/* find the end of the pathname */
len = strlen (newpixname);
#ifndef VMS
while( (len > 0) && (newpixname[len-1] != '/') )
#else
while( (len > 0) && (newpixname[len-1] != ']') && (newpixname[len-1] != ':') )
#endif
len--;
/* add name */
newpixname[len] = '\0';
(void)strncat (newpixname, &pixname[4], SZ_IM2PIXFILE);
}
/* Bare pixel file with no path is assumed to be same as HDR$filename */
else if (strchr (pixname, '/') == NULL && strchr (pixname, '$') == NULL) {
(void)strncpy (newpixname, hdrname, SZ_IM2PIXFILE);
/* find the end of the pathname */
len = strlen (newpixname);
#ifndef VMS
while( (len > 0) && (newpixname[len-1] != '/') )
#else
while( (len > 0) && (newpixname[len-1] != ']') && (newpixname[len-1] != ':') )
#endif
len--;