/* FPACK utility routines
    SPDX-FileCopyrightText: William D. Pence <https://heasarc.gsfc.nasa.gov/fitsio/>
    SPDX-FileCopyrightText: R. Seaman

    SPDX-License-Identifier: LicenseRef-NASA-FV-License-Agreement
*/

#include <time.h>
#include <float.h>
#include <signal.h>
#include <ctype.h>

/* #include  "bzlib.h"  only for experimental purposes */

#if defined(unix) || defined(__unix__)  || defined(__unix)
#include <sys/time.h>
#endif

#include <math.h>
#include <fitsio.h>
#include <fitsio2.h>
#include "fpack.h"
#include <inttypes.h>

/* these filename buffer are used to delete temporary files */
/* in case the program is aborted */
char tempfilename[SZ_STR];
char tempfilename2[SZ_STR];
char tempfilename3[SZ_STR];

/* nearest integer function */
# define NINT(x)  ((x >= 0.) ? (int) (x + 0.5) : (int) (x - 0.5))
# define NSHRT(x) ((x >= 0.) ? (short) (x + 0.5) : (short) (x - 0.5))

/* define variables for measuring elapsed time */
clock_t scpu, ecpu;
long startsec;   /* start of elapsed time interval */
int startmilli;  /* start of elapsed time interval */

/*  CLOCKS_PER_SEC should be defined by most compilers */
#if defined(CLOCKS_PER_SEC)
#define CLOCKTICKS CLOCKS_PER_SEC
#else
/* on SUN OS machine, CLOCKS_PER_SEC is not defined, so set its value */
#define CLOCKTICKS 1000000
#endif

FILE *outreport;

/* dimension of central image area to be sampled for test statistics */
int XSAMPLE = 4100;
int YSAMPLE = 4100;

#define UNUSED(x) (void)(x)
#define fp_tmpnam(suffix, rootname, tmpnam) _fp_tmpnam((char *)suffix, (char *)rootname, (char *)tmpnam)

/*--------------------------------------------------------------------------*/
int fp_noop (void)
{
    fp_msg ("Input and output files are unchanged.\n");
    return(0);
}
/*--------------------------------------------------------------------------*/
void fp_abort_output (fitsfile *infptr, fitsfile *outfptr, int stat)
{
    int status = 0, hdunum;
    char  msg[SZ_STR];

    if (infptr)
    {
        fits_file_name(infptr, tempfilename, &status);
        fits_get_hdu_num(infptr, &hdunum);

        fits_close_file (infptr, &status);

        snprintf(msg, SZ_STR,"Error processing file: %s\n", tempfilename);
        fp_msg (msg);
        snprintf(msg, SZ_STR,"  in HDU number %d\n", hdunum);
        fp_msg (msg);
    }
    else
    {
        snprintf(msg, SZ_STR,"Error: Unable to process input file\n");
        fp_msg(msg);
    }
    fits_report_error (stderr, stat);

    if (outfptr) {
        fits_delete_file(outfptr, &status);
        fp_msg ("Input file is unchanged.\n");
    }
}
/*--------------------------------------------------------------------------*/
int fp_version (void)
{
    float version;
    char cfitsioversion[40];

    fp_msg (FPACK_VERSION);
    fits_get_version(&version);
    snprintf(cfitsioversion, 40," CFITSIO version %5.3f", version);
    fp_msg(cfitsioversion);
    fp_msg ("\n");
    return(0);
}
/*--------------------------------------------------------------------------*/
int fp_access (char *filename)
{
    /* test if a file exists */

    FILE *diskfile;

    diskfile = fopen(filename, "r");

    if (diskfile) {
        fclose(diskfile);
        return(0);
    } else {
        return(-1);
    }
}
/*--------------------------------------------------------------------------*/
int _fp_tmpnam(char *suffix, char *rootname, char *tmpnam)
{
    /* create temporary file name */

    int maxtry = 30, ii;

    if (strlen(suffix) + strlen(rootname) > SZ_STR-5) {
        fp_msg ("Error: filename is too long to create temporary file\n"); exit (-1);
    }

    strcpy (tmpnam, rootname);  /* start with rootname */
    strcat(tmpnam, suffix);     /* append the suffix */

    maxtry = SZ_STR - strlen(tmpnam) - 1;

    for (ii = 0; ii < maxtry; ii++) {
        if (fp_access(tmpnam)) break;  /* good, the file does not exist */
        if (strlen(tmpnam) > SZ_STR-2)
        {
            fp_msg ("\nCould not create temporary file name:\n");
            fp_msg (tmpnam);
            fp_msg ("\n");
            exit (-1);
        }
        strcat(tmpnam, "x");  /* append an x to the name, and try again */
    }

    if (ii == maxtry) {
        fp_msg ("\nCould not create temporary file name:\n");
        fp_msg (tmpnam);
        fp_msg ("\n");
        exit (-1);
    }

    return(0);
}
/*--------------------------------------------------------------------------*/
int fp_init (fpstate *fpptr)
{
    int	ii;

    fpptr->comptype = RICE_1;
    fpptr->quantize_level = DEF_QLEVEL;
    fpptr->no_dither = 0;
    fpptr->dither_method = 1;
    fpptr->dither_offset = 0;
    fpptr->int_to_float = 0;

    /* thresholds when using the -i2f flag */
    fpptr->n3ratio = 2.0;  /* minimum ratio of image noise sigma / q */
    fpptr->n3min = 6.;     /* minimum noise sigma. */

    fpptr->scale = DEF_HCOMP_SCALE;
    fpptr->smooth = DEF_HCOMP_SMOOTH;
    fpptr->rescale_noise = DEF_RESCALE_NOISE;
    fpptr->ntile[0] = (long) -1;	/* -1 means extent of axis */

    for (ii=1; ii < MAX_COMPRESS_DIM; ii++)
        fpptr->ntile[ii] = (long) 1;

    fpptr->to_stdout = 0;
    fpptr->listonly = 0;
    fpptr->clobber = 0;
    fpptr->delete_input = 0;
    fpptr->do_not_prompt = 0;
    fpptr->do_checksums = 1;
    fpptr->do_gzip_file = 0;
    fpptr->do_tables = 0;  /* this is intended for testing purposes  */
    fpptr->do_images = 1;  /* can be turned off with -tableonly switch */
    fpptr->test_all = 0;
    fpptr->verbose = 0;

    fpptr->prefix[0] = 0;
    fpptr->extname[0] = 0;
    fpptr->delete_suffix = 0;
    fpptr->outfile[0] = 0;

    fpptr->firstfile = 1;

    /* magic number for initialization check, boolean for preflight
     */
    fpptr->initialized = FP_INIT_MAGIC;
    fpptr->preflight_checked = 0;
    return(0);
}
/*--------------------------------------------------------------------------*/
int fp_list (int argc, char *argv[], fpstate fpvar)
{
    fitsfile *infptr;
    char	infits[SZ_STR], msg[SZ_STR];
    int	hdunum, iarg, stat=0;
    LONGLONG sizell;

    if (fpvar.initialized != FP_INIT_MAGIC) {
        fp_msg ("Error: internal initialization error\n"); exit (-1);
    }

    for (iarg=fpvar.firstfile; iarg < argc; iarg++) {
        strncpy (infits, argv[iarg], SZ_STR-1);
        infits[SZ_STR-1]=0;

        if (strchr (infits, '[') || strchr (infits, ']')) {
            fp_msg ("Error: section/extension notation not supported: ");
            fp_msg (infits); fp_msg ("\n"); exit (-1);
        }

        if (fp_access (infits) != 0) {
            fp_msg ("Error: can't find or read input file "); fp_msg (infits);
            fp_msg ("\n"); fp_noop (); exit (-1);
        }

        fits_open_file (&infptr, infits, READONLY, &stat);
        if (stat) { fits_report_error (stderr, stat); exit (stat); }

        /* move to the end of file, to get the total size in bytes */
        fits_get_num_hdus (infptr, &hdunum, &stat);
        fits_movabs_hdu (infptr, hdunum, NULL, &stat);
        fits_get_hduaddrll(infptr, NULL, NULL, &sizell, &stat);


        if (stat) {
            fp_abort_output(infptr, NULL, stat);
        }

        snprintf (msg, SZ_STR,"# %s (", infits); fp_msg (msg);

	snprintf(msg, SZ_STR, "%" PRId64 " bytes)\n", (int64_t) sizell);
        fp_msg (msg);

        fp_info_hdu (infptr);

        fits_close_file (infptr, &stat);
        if (stat) { fits_report_error (stderr, stat); exit (stat); }
    }
    return(0);
}
/*--------------------------------------------------------------------------*/
int fp_info_hdu (fitsfile *infptr)
{
    long	naxes[9] = {1, 1, 1, 1, 1, 1, 1, 1, 1};
    char	msg[SZ_STR], val[SZ_CARD], com[SZ_CARD];
    int     naxis=0, hdutype, bitpix, hdupos, stat=0, ii;
    unsigned long   datasum, hdusum;

    fits_movabs_hdu (infptr, 1, NULL, &stat);
    if (stat) {
        fp_abort_output(infptr, NULL, stat);
    }

    for (hdupos=1; ! stat; hdupos++) {
        fits_get_hdu_type (infptr, &hdutype, &stat);
        if (stat) {
            fp_abort_output(infptr, NULL, stat);
        }

        /* fits_get_hdu_type calls unknown extensions "IMAGE_HDU"
         * so consult XTENSION keyword itself
         */
        fits_read_keyword (infptr, "XTENSION", val, com, &stat);
        if (stat == KEY_NO_EXIST) {
            /* in primary HDU which by definition is an "image" */
            stat=0; /* clear for later error handling */

        } else if (stat) {
            fp_abort_output(infptr, NULL, stat);

        } else if (hdutype == IMAGE_HDU) {
            /* that is, if XTENSION != "IMAGE" AND != "BINTABLE" */
            if (strncmp (val+1, "IMAGE", 5) &&
                    strncmp (val+1, "BINTABLE", 5)) {

                /* assign something other than any of these */
                hdutype = IMAGE_HDU + ASCII_TBL + BINARY_TBL;
            }
        }

        fits_get_chksum(infptr, &datasum, &hdusum, &stat);

        if (hdutype == IMAGE_HDU) {
            snprintf (msg, SZ_STR,"  %d IMAGE", hdupos); fp_msg (msg);
            snprintf (msg, SZ_STR," SUMS=%lu/%lu", (unsigned long) (~((int) hdusum)), datasum); fp_msg (msg);

            fits_get_img_param (infptr, 9, &bitpix, &naxis, naxes, &stat);

            snprintf (msg, SZ_STR," BITPIX=%d", bitpix); fp_msg (msg);

            if (naxis == 0) {
                snprintf (msg, SZ_STR," [no_pixels]"); fp_msg (msg);
            } else if (naxis == 1) {
                snprintf (msg, SZ_STR," [%ld]", naxes[1]); fp_msg (msg);
            } else {
                snprintf (msg, SZ_STR," [%ld", naxes[0]); fp_msg (msg);
                for (ii=1; ii < naxis; ii++) {
                    snprintf (msg, SZ_STR,"x%ld", naxes[ii]); fp_msg (msg);
                }
                fp_msg ("]");
            }

            if (fits_is_compressed_image (infptr, &stat)) {
                fits_read_keyword (infptr, "ZCMPTYPE", val, com, &stat);

                /* allow for quote in keyword value */
                if (! strncmp (val+1, "RICE_1", 6))
                    fp_msg (" tiled_rice\n");
                else if (! strncmp (val+1, "GZIP_1", 6))
                    fp_msg (" tiled_gzip_1\n");
                else if (! strncmp (val+1, "GZIP_2", 6))
                    fp_msg (" tiled_gzip_2\n");
                else if (! strncmp (val+1, "PLIO_1", 6))
                    fp_msg (" tiled_plio\n");
                else if (! strncmp (val+1, "HCOMPRESS_1", 11))
                    fp_msg (" tiled_hcompress\n");
                else
                    fp_msg (" unknown\n");

            } else
                fp_msg (" not_tiled\n");

        } else if (hdutype == ASCII_TBL) {
            snprintf (msg, SZ_STR,"  %d ASCII_TBL", hdupos); fp_msg (msg);
            snprintf (msg, SZ_STR," SUMS=%lu/%lu\n", (unsigned long) (~((int) hdusum)), datasum); fp_msg (msg);

        } else if (hdutype == BINARY_TBL) {
            snprintf (msg, SZ_STR,"  %d BINARY_TBL", hdupos); fp_msg (msg);
            snprintf (msg, SZ_STR," SUMS=%lu/%lu\n", (unsigned long) (~((int) hdusum)), datasum); fp_msg (msg);

        } else {
            snprintf (msg, SZ_STR,"  %d OTHER", hdupos); fp_msg (msg);
            snprintf (msg, SZ_STR," SUMS=%lu/%lu",   (unsigned long) (~((int) hdusum)), datasum); fp_msg (msg);
            snprintf (msg, SZ_STR," %s\n", val); fp_msg (msg);
        }

        fits_movrel_hdu (infptr, 1, NULL, &stat);
    }
    return(0);
}

/*--------------------------------------------------------------------------*/
int fp_preflight (int argc, char *argv[], int unpack, fpstate *fpptr)
{
    char	infits[SZ_STR], outfits[SZ_STR];
    int	iarg, namelen, nfiles = 0;

    if (fpptr->initialized != FP_INIT_MAGIC) {
        fp_msg ("Error: internal initialization error\n"); exit (-1);
    }

    for (iarg=fpptr->firstfile; iarg < argc; iarg++) {

        outfits[0] = '\0';

        if (strlen(argv[iarg]) > SZ_STR - 4) {  /* allow for .fz or .gz suffix */
            fp_msg ("Error: input file name\n   "); fp_msg (argv[iarg]);
            fp_msg ("\n   is too long\n"); fp_noop (); exit (-1);
        }

        strncpy (infits, argv[iarg], SZ_STR-1);
        if (infits[0] == '-' && infits[1] != '\0') {
            /* don't interpret this as intending to read input file from stdin */
            fp_msg ("Error: invalid input file name\n   "); fp_msg (argv[iarg]);
            fp_msg ("\n"); fp_noop (); exit (-1);
        }

        if (strchr (infits, '[') || strchr (infits, ']')) {
            fp_msg ("Error: section/extension notation not supported: ");
            fp_msg (infits); fp_msg ("\n"); fp_noop (); exit (-1);
        }

        if (unpack) {
            /* ********** This section applies to funpack ************ */

            /* check that input file  exists */
            if (infits[0] != '-') {  /* if not reading from stdin stream */
                if (fp_access (infits) != 0) {  /* if not, then check if */
                    strcat(infits, ".fz");       /* a .fz version exists */
                    if (fp_access (infits) != 0) {
                        namelen = strlen(infits);
                        infits[namelen - 3] = '\0';  /* remove the .fz suffix */
                        fp_msg ("Error: can't find or read input file "); fp_msg (infits);
                        fp_msg ("\n"); fp_noop (); exit (-1);
                    }
                } else {   /* make sure a .fz version of the same file doesn't exist */
                    namelen = strlen(infits);
                    strcat(infits, ".fz");
                    if (fp_access (infits) == 0) {
                        infits[namelen] = '\0';  /* remove the .fz suffix */
                        fp_msg ("Error: ambiguous input file name.  Which file should be unpacked?:\n  ");
                        fp_msg (infits); fp_msg ("\n  ");
                        fp_msg (infits); fp_msg (".fz\n");
                        fp_noop (); exit (-1);
                    } else {
                        infits[namelen] = '\0';  /* remove the .fz suffix */
                    }
                }
            }

            /* if writing to stdout, then we are all done */
            if (fpptr->to_stdout) {
                continue;
            }

            if (fpptr->outfile[0]) {  /* user specified output file name */
                nfiles++;
                if (nfiles > 1) {
                    fp_msg ("Error: cannot use same output file name for multiple files:\n   ");
                    fp_msg (fpptr->outfile);
                    fp_msg ("\n"); fp_noop (); exit (-1);
                }

                /* check that output file doesn't exist */
                if (fp_access (fpptr->outfile) == 0) {
                    fp_msg ("Error: output file already exists:\n ");
                    fp_msg (fpptr->outfile);
                    fp_msg ("\n "); fp_noop (); exit (-1);
                }
                continue;
            }

            /* construct output file name to test */
            if (fpptr->prefix[0]) {
                if (strlen(fpptr->prefix) + strlen(infits) > SZ_STR - 1) {
                    fp_msg ("Error: output file name for\n   "); fp_msg (infits);
                    fp_msg ("\n   is too long with the prefix\n"); fp_noop (); exit (-1);
                }
                strcat(outfits,fpptr->prefix);
            }

            /* construct output file name */
            if (infits[0] == '-') {
                strcpy(outfits, "output.fits");
            } else {
                strcpy(outfits, infits);
            }

            /* remove .gz suffix, if present (output is not gzipped) */
            namelen = strlen(outfits);
            if ( !strcmp(".gz", outfits + namelen - 3) ) {
                outfits[namelen - 3] = '\0';
            }

            /* check for .fz suffix that is sometimes required */
            /* and remove it if present */
            if (infits[0] != '-') {  /* if not reading from stdin stream */
                namelen = strlen(outfits);
                if ( !strcmp(".fz", outfits + namelen - 3) ) { /* suffix is present */
                    outfits[namelen - 3] = '\0';
                } else if (fpptr->delete_suffix) {  /* required suffix is missing */
                    fp_msg ("Error: input compressed file "); fp_msg (infits);
                    fp_msg ("\n does not have the default .fz suffix.\n");
                    fp_noop (); exit (-1);
                }
            }

            /* if infits != outfits, make sure outfits doesn't already exist */
            if (strcmp(infits, outfits)) {
                if (fp_access (outfits) == 0) {
                    fp_msg ("Error: output file already exists:\n "); fp_msg (outfits);
                    fp_msg ("\n "); fp_noop (); exit (-1);
                }
            }

            /* if gzipping the output, make sure .gz file doesn't exist */
            if (fpptr->do_gzip_file) {
                if (strlen(outfits)+3 > SZ_STR-1)
                {
                    fp_msg ("Error: output file name too long:\n "); fp_msg (outfits);
                    fp_msg ("\n "); fp_noop (); exit (-1);
                }
                strcat(outfits, ".gz");
                if (fp_access (outfits) == 0) {
                    fp_msg ("Error: output file already exists:\n "); fp_msg (outfits);
                    fp_msg ("\n "); fp_noop (); exit (-1);
                }
                namelen = strlen(outfits);
                outfits[namelen - 3] = '\0';  /* remove the .gz suffix again */
            }
        } else {
            /* ********** This section applies to fpack ************ */

            /* check that input file  exists */
            if (infits[0] != '-') {  /* if not reading from stdin stream */
                if (fp_access (infits) != 0) {  /* if not, then check if */
                    if (strlen(infits)+3 > SZ_STR-1)
                    {
                        fp_msg ("Error: input file name too long:\n "); fp_msg (infits);
                        fp_msg ("\n "); fp_noop (); exit (-1);
                    }
                    strcat(infits, ".gz");     /* a gzipped version exists */
                    if (fp_access (infits) != 0) {
                        namelen = strlen(infits);
                        infits[namelen - 3] = '\0';  /* remove the .gz suffix */
                        fp_msg ("Error: can't find or read input file "); fp_msg (infits);
                        fp_msg ("\n"); fp_noop (); exit (-1);
                    }
                }
            }

            /* make sure the file to pack does not already have a .fz suffix */
            namelen = strlen(infits);
            if ( !strcmp(".fz", infits + namelen - 3) ) {
                fp_msg ("Error: fpack input file already has '.fz' suffix\n" ); fp_msg (infits);
                fp_msg ("\n"); fp_noop (); exit (-1);
            }

            /* if writing to stdout, or just testing the files, then we are all done */
            if (fpptr->to_stdout || fpptr->test_all) {
                continue;
            }

            /* construct output file name */
            if (infits[0] == '-') {
                strcpy(outfits, "input.fits");
            } else {
                strcpy(outfits, infits);
            }

            /* remove .gz suffix, if present (output is not gzipped) */
            namelen = strlen(outfits);
            if ( !strcmp(".gz", outfits + namelen - 3) ) {
                outfits[namelen - 3] = '\0';
            }

            /* remove .imh suffix (IRAF format image), and replace with .fits */
            namelen = strlen(outfits);
            if ( !strcmp(".imh", outfits + namelen - 4) ) {
                outfits[namelen - 4] = '\0';
                strcat(outfits, ".fits");
            }

            /* If not clobbering the input file, add .fz suffix to output name */
            if (! fpptr->clobber)
                strcat(outfits, ".fz");

            /* if infits != outfits, make sure outfits doesn't already exist */
            if (strcmp(infits, outfits)) {
                if (fp_access (outfits) == 0) {
                    fp_msg ("Error: output file already exists:\n "); fp_msg (outfits);
                    fp_msg ("\n "); fp_noop (); exit (-1);
                }
            }
        }   /* end of fpack section */
    }

    fpptr->preflight_checked++;
    return(0);
}

/*--------------------------------------------------------------------------*/
/* must run fp_preflight() before fp_loop()
 */
int fp_loop (int argc, char *argv[], int unpack, char *output_filename, fpstate fpvar)
{
    char	infits[SZ_STR], outfits[SZ_STR];
    char	temp[SZ_STR], answer[30];
    char    valchar[]="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.#()+,-_@[]/^{}";
    int	ichar=0, outlen=0, iarg, islossless, namelen, iraf_infile = 0, status = 0, ifail;

    if (fpvar.initialized != FP_INIT_MAGIC) {
        fp_msg ("Error: internal initialization error\n"); exit (-1);
    } else if (! fpvar.preflight_checked) {
        fp_msg ("Error: internal preflight error\n"); exit (-1);
    }

    if (fpvar.test_all && fpvar.outfile[0]) {
        outreport = fopen(fpvar.outfile, "w");
        fprintf(outreport," Filename Extension BITPIX NAXIS1 NAXIS2 Size N_nulls Minval Maxval Mean Sigm Noise1 Noise2 Noise3 Noise5 T_whole T_rowbyrow ");
        fprintf(outreport,"[Comp_ratio, Pack_cpu, Unpack_cpu, Lossless readtimes] (repeated for Rice, Hcompress, and GZIP)\n");
    }


    tempfilename[0] = '\0';
    tempfilename2[0] = '\0';
    tempfilename3[0] = '\0';

    /* set up signal handler to delete temporary file on abort */
#ifdef SIGINT
    if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
        (void) signal(SIGINT,  abort_fpack);
    }
#endif

#ifdef SIGTERM
    if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
        (void) signal(SIGTERM,  abort_fpack);
    }
#endif

#ifdef SIGHUP
    if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
        (void) signal(SIGHUP,  abort_fpack);
    }
#endif

    for (iarg=fpvar.firstfile; iarg < argc; iarg++) {

        temp[0] = '\0';
        outfits[0] = '\0';
        islossless = 1;

        strncpy (infits, argv[iarg], SZ_STR - 1);
        infits[SZ_STR-1]=0;

        if (unpack) {
            /* ********** This section applies to funpack ************ */

            /* find input file */
            if (infits[0] != '-') {  /* if not reading from stdin stream */
                if (fp_access (infits) != 0) {  /* if not, then */
                    strcat(infits, ".fz");       /* a .fz version must exist */
                }
            }

            if (fpvar.to_stdout) {
                strcpy(outfits, "-");

            } else if (fpvar.outfile[0]) {  /* user specified output file name */
                strcpy(outfits, fpvar.outfile);

            } else {
                /* construct output file name */
                if (fpvar.prefix[0]) {
                    strcat(outfits,fpvar.prefix);
                }

                /* construct output file name */
                if (infits[0] == '-') {
                    strcpy(outfits, "output.fits");
                } else {
                    /*strcpy(outfits, infits);*/
                    strcpy(outfits, output_filename);
                }

                /* remove .gz suffix, if present (output is not gzipped) */
                namelen = strlen(outfits);
                if ( !strcmp(".gz", outfits + namelen - 3) ) {
                    outfits[namelen - 3] = '\0';
                }

                /* check for .fz suffix that is sometimes required */
                /* and remove it if present */
                namelen = strlen(outfits);
                if ( !strcmp(".fz", outfits + namelen - 3) ) { /* suffix is present */
                    outfits[namelen - 3] = '\0';
                }
            }

        } else {
            /* ********** This section applies to fpack ************ */

            if (fpvar.to_stdout) {
                strcpy(outfits, "-");
            } else if (! fpvar.test_all) {

                /* construct output file name */
                if (infits[0] == '-') {
                    strcpy(outfits, "input.fits");
                } else {
                    strcpy(outfits, output_filename);
                }

                /* remove .gz suffix, if present (output is not gzipped) */
                namelen = strlen(outfits);
                if ( !strcmp(".gz", outfits + namelen - 3) ) {
                    outfits[namelen - 3] = '\0';
                }

                /* remove .imh suffix (IRAF format image), and replace with .fits */
                namelen = strlen(outfits);
                if ( !strcmp(".imh", outfits + namelen - 4) ) {
                    outfits[namelen - 4] = '\0';
                    strcat(outfits, ".fits");
                    iraf_infile = 1;  /* this is an IRAF format input file */
                    /* change the output name to "NAME.fits.fz" */
                }

                /* If not clobbering the input file, add .fz suffix to output name */
                if (! fpvar.clobber)
                    strcat(outfits, ".fz");
            }
        }

        strncpy(temp, outfits, SZ_STR-1);
        temp[SZ_STR-1]=0;

        if (infits[0] != '-') {  /* if not reading from stdin stream */
            if (!strcmp(infits, outfits) ) {  /* are input and output names the same? */

                /* clobber the input file with the output file with the same name */
                if (! fpvar.clobber) {
                    fp_msg ("\nError: must use -F flag to clobber input file.\n");
                    exit (-1);
                }

                /* create temporary file name in the output directory (same as input directory)*/
                fp_tmpnam("Tmp1", infits, outfits);

                strcpy(tempfilename, outfits);  /* store temp file name, in case of abort */
            }
        }


        /* *************** now do the real work ********************* */

        if (fpvar.verbose && ! fpvar.to_stdout)
            printf("%s ", infits);

        if (fpvar.test_all) {   /* compare all the algorithms */

            /* create 2 temporary file names, in the CWD */
            fp_tmpnam("Tmpfile1", "", tempfilename);
            fp_tmpnam("Tmpfile2", "", tempfilename2);

            fp_test (infits, tempfilename, tempfilename2, fpvar);

            remove(tempfilename);
            tempfilename[0] = '\0';   /* clear the temp file name */
            remove(tempfilename2);
            tempfilename2[0] = '\0';
            continue;

        } else if (unpack) {
            if (fpvar.to_stdout) {
                /* unpack the input file to the stdout stream */
                fp_unpack (infits, outfits, fpvar);
            } else {
                /* unpack to temporary file, so other tasks can't open it until it is renamed */

                /* create  temporary file name, in the output directory */
                fp_tmpnam("Tmp2", outfits, tempfilename2);

                /* unpack the input file to the temporary file */
                fp_unpack (infits, tempfilename2, fpvar);

                /* rename the temporary file to it's real name */
                ifail = rename(tempfilename2, outfits);
                if (ifail) {
                    fp_msg("Failed to rename temporary file name:\n  ");
                    fp_msg(tempfilename2);
                    fp_msg(" -> ");
                    fp_msg(outfits);
                    fp_msg("\n");
                    exit (-1);
                } else {
                    tempfilename2[0] = '\0';  /* clear temporary file name */
                }
            }
        }  else {
            fp_pack (infits, outfits, fpvar, &islossless);
        }

        if (fpvar.to_stdout) {
            continue;
        }

        /* ********** clobber and/or delete files, if needed ************** */

        if (!strcmp(infits, temp) && fpvar.clobber ) {

            if (!islossless && ! fpvar.do_not_prompt) {
                fp_msg ("\nFile ");
                fp_msg (infits);
                fp_msg ("\nwas compressed with a LOSSY method.  Overwrite the\n");
                fp_msg ("original file with the compressed version? (Y/N) ");
                if (fgets(answer, 29, stdin) && answer[0] != 'Y' && answer[0] != 'y') {
                    fp_msg ("\noriginal file NOT overwritten!\n");
                    remove(outfits);
                    continue;
                }
            }

            if (iraf_infile) {  /* special case of deleting an IRAF format header and pixel file */
                if (fits_delete_iraf_file(infits, &status)) {
                    fp_msg("\nError deleting IRAF .imh and .pix files.\n");
                    fp_msg(infits); fp_msg ("\n"); exit (-1);
                }
            }

#if defined(unix) || defined(__unix__)  || defined(__unix)
            /* rename clobbers input on Unix platforms */
            if (rename (outfits, temp) != 0) {
                fp_msg ("\nError renaming tmp file to ");
                fp_msg (temp); fp_msg ("\n"); exit (-1);
            }
#else
            /* rename DOES NOT clobber existing files on Windows platforms */
            /* so explicitly remove any existing file before renaming the file */
            remove(temp);
            if (rename (outfits, temp) != 0) {
                fp_msg ("\nError renaming tmp file to ");
                fp_msg (temp); fp_msg ("\n"); exit (-1);
            }
#endif

            tempfilename[0] = '\0';  /* clear temporary file name */
            strcpy(outfits, temp);

        } else if (fpvar.clobber || fpvar.delete_input) {      /* delete the input file */
            if (!islossless && !fpvar.do_not_prompt) {  /* user did not turn off delete prompt */
                fp_msg ("\nFile ");
                fp_msg (infits);
                fp_msg ("\nwas compressed with a LOSSY method.  \n");
                fp_msg ("Delete the original file? (Y/N) ");
                if (fgets(answer, 29, stdin) && answer[0] != 'Y' && answer[0] != 'y') {  /* user abort */
                    fp_msg ("\noriginal file NOT deleted!\n");
                } else {
                    if (iraf_infile) {  /* special case of deleting an IRAF format header and pixel file */
                        if (fits_delete_iraf_file(infits, &status)) {
                            fp_msg("\nError deleting IRAF .imh and .pix files.\n");
                            fp_msg(infits); fp_msg ("\n"); exit (-1);
                        }
                    }  else if (remove(infits) != 0) {  /* normal case of deleting input FITS file */
                        fp_msg ("\nError deleting input file ");
                        fp_msg (infits); fp_msg ("\n"); exit (-1);
                    }
                }
            } else {   /* user said don't prompt, so just delete the input file */
                if (iraf_infile) {  /* special case of deleting an IRAF format header and pixel file */
                    if (fits_delete_iraf_file(infits, &status)) {
                        fp_msg("\nError deleting IRAF .imh and .pix files.\n");
                        fp_msg(infits); fp_msg ("\n"); exit (-1);
                    }
                }  else if (remove(infits) != 0) {  /* normal case of deleting input FITS file */
                    fp_msg ("\nError deleting input file ");
                    fp_msg (infits); fp_msg ("\n"); exit (-1);
                }
            }
        }
        iraf_infile = 0;

        if (fpvar.do_gzip_file) {       /* gzip the output file */
            strcpy(temp, "gzip -1 ");
            outlen = strlen(outfits);
            if (outlen + 8 > SZ_STR-1)
            {
                fp_msg("\nError: Output file name is too long.\n");
                exit(-1);
            }
            for (ichar=0; ichar < outlen; ++ichar)
            {
                if (!strchr(valchar, outfits[ichar]))
                {
                    fp_msg("\n Error: Invalid characters in output file name.\n");
                    exit(-1);
                }
            }
            strcat(temp,outfits);
            int rc = system(temp);
            UNUSED(rc);
            strcat(outfits, ".gz");    /* only possibible with funpack */
        }

        if (fpvar.verbose && ! fpvar.to_stdout)
            printf("-> %s\n", outfits);

    }

    if (fpvar.test_all && fpvar.outfile[0])
        fclose(outreport);
    return(0);
}

/*--------------------------------------------------------------------------*/
/* fp_pack assumes the output file does not exist (checked by preflight)
 */
int fp_pack (char *infits, char *outfits, fpstate fpvar, int *islossless)
{
    fitsfile *infptr, *outfptr;
    int	stat=0;

    fits_open_file (&infptr, infits, READONLY, &stat);
    if (stat)
    {
        fits_report_error (stderr, stat);
        return -1;
    }

    fits_create_file (&outfptr, outfits, &stat);
    if (stat)
    {
        fp_abort_output(infptr, outfptr, stat);
        return -1;
    }

    while (! stat) {

        /*  LOOP OVER EACH HDU */

        fits_set_lossy_int (outfptr, fpvar.int_to_float, &stat);
        fits_set_compression_type (outfptr, fpvar.comptype, &stat);
        fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);

        if (fpvar.no_dither)
            fits_set_quantize_method(outfptr, -1, &stat);
        else
            fits_set_quantize_method(outfptr, fpvar.dither_method, &stat);

        fits_set_quantize_level (outfptr, fpvar.quantize_level, &stat);
        fits_set_dither_offset(outfptr, fpvar.dither_offset, &stat);
        fits_set_hcomp_scale (outfptr, fpvar.scale, &stat);
        fits_set_hcomp_smooth (outfptr, fpvar.smooth, &stat);

        fp_pack_hdu (infptr, outfptr, fpvar, islossless, &stat);

        if (fpvar.do_checksums) {
            fits_write_chksum (outfptr, &stat);
        }

        fits_movrel_hdu (infptr, 1, NULL, &stat);
    }

    if (stat == END_OF_FILE) stat = 0;

    /* set checksum for case of newly created primary HDU	 */

    if (fpvar.do_checksums) {
        fits_movabs_hdu (outfptr, 1, NULL, &stat);
        fits_write_chksum (outfptr, &stat);
    }

    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    fits_close_file (outfptr, &stat);
    fits_close_file (infptr, &stat);

    return(0);
}

/*--------------------------------------------------------------------------*/
/*
 */
int fp_pack_data_to_fits (const char *inputBuffer, size_t inputBufferSize, fitsfile **outfits, fpstate fpvar, int *islossless)
{
    fitsfile *infptr, *outfptr;
    int	stat=0;
    size_t outbufferSize = 2880;
    void *outbuffer = (char *)malloc(outbufferSize);
    void *inbuffer = (void *)(inputBuffer);

    fits_open_memfile(&infptr, "", READONLY, &inbuffer, &inputBufferSize, 2880, NULL, &stat);
    if (stat)
    {
        free(outbuffer);
        fits_report_error (stderr, stat);
        return -1;
    }

    fits_create_memfile(&outfptr, &outbuffer, &outbufferSize, 2880, realloc, &stat);
    if (stat)
    {
        fp_abort_output(infptr, outfptr, stat);
        return -1;
    }

    while (! stat) {

        /*  LOOP OVER EACH HDU */

        fits_set_lossy_int (outfptr, fpvar.int_to_float, &stat);
        fits_set_compression_type (outfptr, fpvar.comptype, &stat);
        fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);

        if (fpvar.no_dither)
            fits_set_quantize_method(outfptr, -1, &stat);
        else
            fits_set_quantize_method(outfptr, fpvar.dither_method, &stat);

        fits_set_quantize_level (outfptr, fpvar.quantize_level, &stat);
        fits_set_dither_offset(outfptr, fpvar.dither_offset, &stat);
        fits_set_hcomp_scale (outfptr, fpvar.scale, &stat);
        fits_set_hcomp_smooth (outfptr, fpvar.smooth, &stat);

        fp_pack_hdu (infptr, outfptr, fpvar, islossless, &stat);

        if (fpvar.do_checksums) {
            fits_write_chksum (outfptr, &stat);
        }

        fits_movrel_hdu (infptr, 1, NULL, &stat);
    }

    if (stat == END_OF_FILE) stat = 0;

    /* set checksum for case of newly created primary HDU	 */

    if (fpvar.do_checksums) {
        fits_movabs_hdu (outfptr, 1, NULL, &stat);
        fits_write_chksum (outfptr, &stat);
    }

    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    fits_close_file (infptr, &stat);
    *outfits = outfptr;

    return(0);
}

/*--------------------------------------------------------------------------*/
/*
 */
int fp_pack_data_to_data (const char *inputBuffer, size_t inputBufferSize, unsigned char **outputBuffer, size_t *outputBufferSize,
                          fpstate fpvar, int *islossless)
{
    fitsfile *infptr, *outfptr;
    int	stat=0;
    void *inbuffer = (void *)(inputBuffer);

    fits_open_memfile(&infptr, "", READONLY, &inbuffer, &inputBufferSize, 2880, NULL, &stat);
    if (stat)
    {
        fits_report_error (stderr, stat);
        return -1;
    }

    void *outbuffer = (void *)(outputBuffer);
    fits_create_memfile(&outfptr, outbuffer, outputBufferSize, 2880, realloc, &stat);
    if (stat)
    {
        fp_abort_output(infptr, outfptr, stat);
        return -1;
    }

    while (! stat) {

        /*  LOOP OVER EACH HDU */

        fits_set_lossy_int (outfptr, fpvar.int_to_float, &stat);
        fits_set_compression_type (outfptr, fpvar.comptype, &stat);
        fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);

        if (fpvar.no_dither)
            fits_set_quantize_method(outfptr, -1, &stat);
        else
            fits_set_quantize_method(outfptr, fpvar.dither_method, &stat);

        fits_set_quantize_level (outfptr, fpvar.quantize_level, &stat);
        fits_set_dither_offset(outfptr, fpvar.dither_offset, &stat);
        fits_set_hcomp_scale (outfptr, fpvar.scale, &stat);
        fits_set_hcomp_smooth (outfptr, fpvar.smooth, &stat);

        fp_pack_hdu (infptr, outfptr, fpvar, islossless, &stat);

        if (fpvar.do_checksums) {
            fits_write_chksum (outfptr, &stat);
        }

        fits_movrel_hdu (infptr, 1, NULL, &stat);
    }

    if (stat == END_OF_FILE) stat = 0;

    /* set checksum for case of newly created primary HDU	 */

    if (fpvar.do_checksums) {
        fits_movabs_hdu (outfptr, 1, NULL, &stat);
        fits_write_chksum (outfptr, &stat);
    }

    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    fits_close_file (infptr, &stat);
    return(0);
}

/*--------------------------------------------------------------------------*/
/*
 */
int fp_pack_fits_to_fits (fitsfile *infptr, fitsfile **outfits, fpstate fpvar, int *islossless)
{
    fitsfile *outfptr;
    int	stat=0;
    size_t outbufferSize = 2880;
    void *outbuffer = (char *)malloc(outbufferSize);

    fits_create_memfile(&outfptr, &outbuffer, &outbufferSize, 2880, realloc, &stat);
    if (stat)
    {
        fp_abort_output(infptr, outfptr, stat);
        return -1;
    }

    while (! stat) {

        /*  LOOP OVER EACH HDU */

        fits_set_lossy_int (outfptr, fpvar.int_to_float, &stat);
        fits_set_compression_type (outfptr, fpvar.comptype, &stat);
        fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);

        if (fpvar.no_dither)
            fits_set_quantize_method(outfptr, -1, &stat);
        else
            fits_set_quantize_method(outfptr, fpvar.dither_method, &stat);

        fits_set_quantize_level (outfptr, fpvar.quantize_level, &stat);
        fits_set_dither_offset(outfptr, fpvar.dither_offset, &stat);
        fits_set_hcomp_scale (outfptr, fpvar.scale, &stat);
        fits_set_hcomp_smooth (outfptr, fpvar.smooth, &stat);

        fp_pack_hdu (infptr, outfptr, fpvar, islossless, &stat);

        if (fpvar.do_checksums) {
            fits_write_chksum (outfptr, &stat);
        }

        fits_movrel_hdu (infptr, 1, NULL, &stat);
    }

    if (stat == END_OF_FILE) stat = 0;

    /* set checksum for case of newly created primary HDU	 */

    if (fpvar.do_checksums) {
        fits_movabs_hdu (outfptr, 1, NULL, &stat);
        fits_write_chksum (outfptr, &stat);
    }

    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    fits_close_file (infptr, &stat);
    *outfits = outfptr;

    return(0);
}

/*--------------------------------------------------------------------------*/
/* fp_unpack assumes the output file does not exist
 */
int fp_unpack (char *infits, char *outfits, fpstate fpvar)
{
    fitsfile *infptr, *outfptr;
    int stat=0, hdutype, extnum, single = 0;
    char *loc, *hduloc = 0, hduname[SZ_STR] = { 0 };

    fits_open_file (&infptr, infits, READONLY, &stat);
    fits_create_file (&outfptr, outfits, &stat);

    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    if (fpvar.extname[0]) {  /* unpack a list of HDUs? */

        /* move to the first HDU in the list */
        hduloc = fpvar.extname;
        loc = strchr(hduloc, ','); /* look for 'comma' delimiter between names */

        if (loc)
            *loc = '\0';  /* terminate the first name in the string */

        strcpy(hduname, hduloc);  /* copy the first name into temporary string */

        if (loc)
            hduloc = loc + 1;  /* advance to the beginning of the next name, if any */
        else {
            hduloc += strlen(hduname);  /* end of the list */
            single = 1;  /* only 1 HDU is being unpacked */
        }

        if (isdigit( (int) hduname[0]) ) {
            extnum = strtol(hduname, &loc, 10); /* read the string as an integer */

            /* check for junk following the integer */
            if (*loc == '\0' )  /* no junk, so move to this HDU number (+1) */
            {
                fits_movabs_hdu(infptr, extnum + 1, &hdutype, &stat);  /* move to HDU number */
                if (hdutype != IMAGE_HDU)
                    stat = NOT_IMAGE;

            } else {  /* the string is not an integer, so must be the column name */
                hdutype = IMAGE_HDU;
                fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
            }
        }
        else
        {
            /* move to the named image extension */
            hdutype = IMAGE_HDU;
            fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
        }
    }

    if (stat) {
        fp_msg ("Unable to find and move to extension '");
        fp_msg(hduname);
        fp_msg("'\n");
        fp_abort_output(infptr, outfptr, stat);
    }

    while (! stat) {

        if (single)
            stat = -1;  /* special status flag to force output primary array */

        fp_unpack_hdu (infptr, outfptr, fpvar, &stat);

        if (fpvar.do_checksums) {
            fits_write_chksum (outfptr, &stat);
        }

        /* move to the next HDU */
        if (fpvar.extname[0]) {  /* unpack a list of HDUs? */

            if (!(*hduloc)) {
                stat = END_OF_FILE;  /* we reached the end of the list */
            } else {
                /* parse the next HDU name and move to it */
                loc = strchr(hduloc, ',');

                if (loc)         /* look for 'comma' delimiter between names */
                    *loc = '\0';  /* terminate the first name in the string */

                strcpy(hduname, hduloc);  /* copy the next name into temporary string */

                if (loc)
                    hduloc = loc + 1;  /* advance to the beginning of the next name, if any */
                else
                    *hduloc = '\0';  /* end of the list */

                if (isdigit( (int) hduname[0]) ) {
                    extnum = strtol(hduname, &loc, 10); /* read the string as an integer */

                    /* check for junk following the integer */
                    if (*loc == '\0' )   /* no junk, so move to this HDU number (+1) */
                    {
                        fits_movabs_hdu(infptr, extnum + 1, &hdutype, &stat);  /* move to HDU number */
                        if (hdutype != IMAGE_HDU)
                            stat = NOT_IMAGE;

                    } else {  /* the string is not an integer, so must be the column name */
                        hdutype = IMAGE_HDU;
                        fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
                    }

                } else {
                    /* move to the named image extension */
                    hdutype = IMAGE_HDU;
                    fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
                }

                if (stat) {
                    fp_msg ("Unable to find and move to extension '");
                    fp_msg(hduname);
                    fp_msg("'\n");
                }
            }
        } else {
            /* increment to the next HDU */
            fits_movrel_hdu (infptr, 1, NULL, &stat);
        }
    }

    if (stat == END_OF_FILE) stat = 0;

    /* set checksum for case of newly created primary HDU
         */
    if (fpvar.do_checksums) {
        fits_movabs_hdu (outfptr, 1, NULL, &stat);
        fits_write_chksum (outfptr, &stat);
    }


    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    fits_close_file (outfptr, &stat);
    fits_close_file (infptr, &stat);

    return(0);
}

/*--------------------------------------------------------------------------*/
/* fp_unpack assumes the output file does not exist
 */
int fp_unpack_file_to_fits (char *infits, fitsfile **outfits, fpstate fpvar)
{
    fitsfile *infptr, *outfptr;
    int stat=0, hdutype, extnum, single = 0;
    char *loc, *hduloc = 0, hduname[SZ_STR] = { 0 };
    size_t outbufferSize = 2880;
    void *outbuffer = (char *)malloc(outbufferSize);

    fits_open_file (&infptr, infits, READONLY, &stat);
    fits_create_memfile(&outfptr, &outbuffer, &outbufferSize, 2880, realloc, &stat);

    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    if (fpvar.extname[0]) {  /* unpack a list of HDUs? */

        /* move to the first HDU in the list */
        hduloc = fpvar.extname;
        loc = strchr(hduloc, ','); /* look for 'comma' delimiter between names */

        if (loc)
            *loc = '\0';  /* terminate the first name in the string */

        strcpy(hduname, hduloc);  /* copy the first name into temporary string */

        if (loc)
            hduloc = loc + 1;  /* advance to the beginning of the next name, if any */
        else {
            hduloc += strlen(hduname);  /* end of the list */
            single = 1;  /* only 1 HDU is being unpacked */
        }

        if (isdigit( (int) hduname[0]) ) {
            extnum = strtol(hduname, &loc, 10); /* read the string as an integer */

            /* check for junk following the integer */
            if (*loc == '\0' )  /* no junk, so move to this HDU number (+1) */
            {
                fits_movabs_hdu(infptr, extnum + 1, &hdutype, &stat);  /* move to HDU number */
                if (hdutype != IMAGE_HDU)
                    stat = NOT_IMAGE;

            } else {  /* the string is not an integer, so must be the column name */
                hdutype = IMAGE_HDU;
                fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
            }
        }
        else
        {
            /* move to the named image extension */
            hdutype = IMAGE_HDU;
            fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
        }
    }

    if (stat) {
        fp_msg ("Unable to find and move to extension '");
        fp_msg(hduname);
        fp_msg("'\n");
        fp_abort_output(infptr, outfptr, stat);
    }

    while (! stat) {

        if (single)
            stat = -1;  /* special status flag to force output primary array */

        fp_unpack_hdu (infptr, outfptr, fpvar, &stat);

        if (fpvar.do_checksums) {
            fits_write_chksum (outfptr, &stat);
        }

        /* move to the next HDU */
        if (fpvar.extname[0]) {  /* unpack a list of HDUs? */

            if (!(*hduloc)) {
                stat = END_OF_FILE;  /* we reached the end of the list */
            } else {
                /* parse the next HDU name and move to it */
                loc = strchr(hduloc, ',');

                if (loc)         /* look for 'comma' delimiter between names */
                    *loc = '\0';  /* terminate the first name in the string */

                strcpy(hduname, hduloc);  /* copy the next name into temporary string */

                if (loc)
                    hduloc = loc + 1;  /* advance to the beginning of the next name, if any */
                else
                    *hduloc = '\0';  /* end of the list */

                if (isdigit( (int) hduname[0]) ) {
                    extnum = strtol(hduname, &loc, 10); /* read the string as an integer */

                    /* check for junk following the integer */
                    if (*loc == '\0' )   /* no junk, so move to this HDU number (+1) */
                    {
                        fits_movabs_hdu(infptr, extnum + 1, &hdutype, &stat);  /* move to HDU number */
                        if (hdutype != IMAGE_HDU)
                            stat = NOT_IMAGE;

                    } else {  /* the string is not an integer, so must be the column name */
                        hdutype = IMAGE_HDU;
                        fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
                    }

                } else {
                    /* move to the named image extension */
                    hdutype = IMAGE_HDU;
                    fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
                }

                if (stat) {
                    fp_msg ("Unable to find and move to extension '");
                    fp_msg(hduname);
                    fp_msg("'\n");
                }
            }
        } else {
            /* increment to the next HDU */
            fits_movrel_hdu (infptr, 1, NULL, &stat);
        }
    }

    if (stat == END_OF_FILE) stat = 0;

    /* set checksum for case of newly created primary HDU
         */
    if (fpvar.do_checksums) {
        fits_movabs_hdu (outfptr, 1, NULL, &stat);
        fits_write_chksum (outfptr, &stat);
    }


    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    //fits_close_file (outfptr, &stat);
    fits_close_file (infptr, &stat);
    *outfits = outfptr;

    return(0);
}

/*--------------------------------------------------------------------------*/
/* fp_unpack_memroy is like fp_unpack but unpacks in RAM.
 */
int fp_unpack_data_to_fits (const char *inputBuffer, size_t inputBufferSize, fitsfile **outfits, fpstate fpvar)
{
    fitsfile *infptr, *outfptr;
    int stat=0, hdutype, extnum, single = 0;
    char *loc, *hduloc = 0, hduname[SZ_STR] = { 0 };
    size_t outbufferSize = 2880;
    void *outbuffer = (char *)malloc(outbufferSize);
    void *inbuffer = (void *)(inputBuffer);

    fits_open_memfile(&infptr, "", READONLY, &inbuffer, &inputBufferSize, 2880, NULL, &stat);
    fits_create_memfile(&outfptr, &outbuffer, &outbufferSize, 2880, realloc, &stat);

    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    if (fpvar.extname[0]) {  /* unpack a list of HDUs? */

        /* move to the first HDU in the list */
        hduloc = fpvar.extname;
        loc = strchr(hduloc, ','); /* look for 'comma' delimiter between names */

        if (loc)
            *loc = '\0';  /* terminate the first name in the string */

        strcpy(hduname, hduloc);  /* copy the first name into temporary string */

        if (loc)
            hduloc = loc + 1;  /* advance to the beginning of the next name, if any */
        else {
            hduloc += strlen(hduname);  /* end of the list */
            single = 1;  /* only 1 HDU is being unpacked */
        }

        if (isdigit( (int) hduname[0]) ) {
            extnum = strtol(hduname, &loc, 10); /* read the string as an integer */

            /* check for junk following the integer */
            if (*loc == '\0' )  /* no junk, so move to this HDU number (+1) */
            {
                fits_movabs_hdu(infptr, extnum + 1, &hdutype, &stat);  /* move to HDU number */
                if (hdutype != IMAGE_HDU)
                    stat = NOT_IMAGE;

            } else {  /* the string is not an integer, so must be the column name */
                hdutype = IMAGE_HDU;
                fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
            }
        }
        else
        {
            /* move to the named image extension */
            hdutype = IMAGE_HDU;
            fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
        }
    }

    if (stat) {
        fp_msg ("Unable to find and move to extension '");
        fp_msg(hduname);
        fp_msg("'\n");
        fp_abort_output(infptr, outfptr, stat);
    }

    while (! stat) {

        if (single)
            stat = -1;  /* special status flag to force output primary array */

        fp_unpack_hdu (infptr, outfptr, fpvar, &stat);

        if (fpvar.do_checksums) {
            fits_write_chksum (outfptr, &stat);
        }

        /* move to the next HDU */
        if (fpvar.extname[0]) {  /* unpack a list of HDUs? */

            if (!(*hduloc)) {
                stat = END_OF_FILE;  /* we reached the end of the list */
            } else {
                /* parse the next HDU name and move to it */
                loc = strchr(hduloc, ',');

                if (loc)         /* look for 'comma' delimiter between names */
                    *loc = '\0';  /* terminate the first name in the string */

                strcpy(hduname, hduloc);  /* copy the next name into temporary string */

                if (loc)
                    hduloc = loc + 1;  /* advance to the beginning of the next name, if any */
                else
                    *hduloc = '\0';  /* end of the list */

                if (isdigit( (int) hduname[0]) ) {
                    extnum = strtol(hduname, &loc, 10); /* read the string as an integer */

                    /* check for junk following the integer */
                    if (*loc == '\0' )   /* no junk, so move to this HDU number (+1) */
                    {
                        fits_movabs_hdu(infptr, extnum + 1, &hdutype, &stat);  /* move to HDU number */
                        if (hdutype != IMAGE_HDU)
                            stat = NOT_IMAGE;

                    } else {  /* the string is not an integer, so must be the column name */
                        hdutype = IMAGE_HDU;
                        fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
                    }

                } else {
                    /* move to the named image extension */
                    hdutype = IMAGE_HDU;
                    fits_movnam_hdu(infptr, hdutype, hduname, 0, &stat);
                }

                if (stat) {
                    fp_msg ("Unable to find and move to extension '");
                    fp_msg(hduname);
                    fp_msg("'\n");
                }
            }
        } else {
            /* increment to the next HDU */
            fits_movrel_hdu (infptr, 1, NULL, &stat);
        }
    }

    if (stat == END_OF_FILE) stat = 0;

    /* set checksum for case of newly created primary HDU
         */
    if (fpvar.do_checksums) {
        fits_movabs_hdu (outfptr, 1, NULL, &stat);
        fits_write_chksum (outfptr, &stat);
    }


    if (stat) {
        fp_abort_output(infptr, outfptr, stat);
    }

    //fits_close_file (outfptr, &stat);
    fits_close_file (infptr, &stat);

    *outfits = outfptr;
    return(0);
}

/*--------------------------------------------------------------------------*/
/* fp_test assumes the output files do not exist
 */
int fp_test (char *infits, char *outfits, char *outfits2, fpstate fpvar)
{
    fitsfile *inputfptr, *infptr, *outfptr, *outfptr2, *tempfile;

    long	naxes[9] = {1, 1, 1, 1, 1, 1, 1, 1, 1};
    int	stat=0, totpix=0, naxis=0, ii, hdutype, bitpix = 0, extnum = 0, len;
    int     tstatus = 0, hdunum, rescale_flag, bpix = 8, ncols;
    char	dtype[8], dimen[100];
    double  bscale, rescale, noisemin;
    long headstart, datastart, dataend;
    float origdata = 0., whole_cpu, whole_elapse, row_elapse, row_cpu, xbits;

    LONGLONG nrows;
    /* structure to hold image statistics (defined in fpack.h) */
    imgstats imagestats = { 0 };

    fits_open_file (&inputfptr, infits, READONLY, &stat);
    fits_create_file (&outfptr, outfits, &stat);
    fits_create_file (&outfptr2, outfits2, &stat);

    if (stat) { fits_report_error (stderr, stat); exit (stat); }

    while (! stat) {

        /*  LOOP OVER EACH HDU */
        rescale_flag = 0;
        fits_get_hdu_type (inputfptr, &hdutype, &stat);

        if (hdutype == IMAGE_HDU) {
            fits_get_img_param (inputfptr, 9, &bitpix, &naxis, naxes, &stat);
            for (totpix=1, ii=0; ii < 9; ii++) totpix *= naxes[ii];
        }

        if (!fits_is_compressed_image (inputfptr,  &stat) && hdutype == IMAGE_HDU &&
                naxis != 0 && totpix != 0 && fpvar.do_images) {

            /* rescale a scaled integer image to reduce noise? */
            if (fpvar.rescale_noise != 0. && bitpix > 0 && bitpix < LONGLONG_IMG) {

                tstatus = 0;
                fits_read_key(inputfptr, TDOUBLE, "BSCALE", &bscale, 0, &tstatus);

                if (tstatus == 0 && bscale != 1.0) {  /* image must be scaled */

                    if (bitpix == LONG_IMG)
                        fp_i4stat(inputfptr, naxis, naxes, &imagestats, &stat);
                    else
                        fp_i2stat(inputfptr, naxis, naxes, &imagestats, &stat);

                    /* use the minimum of the MAD 2nd, 3rd, and 5th order noise estimates */
                    noisemin = imagestats.noise3;
                    if (imagestats.noise2 != 0. && imagestats.noise2 < noisemin) noisemin = imagestats.noise2;
                    if (imagestats.noise5 != 0. && imagestats.noise5 < noisemin) noisemin = imagestats.noise5;

                    rescale = noisemin / fpvar.rescale_noise;
                    if (rescale > 1.0) {

                        /* all the criteria are met, so create a temporary file that */
                        /* contains a rescaled version of the image, in CWD */

                        /* create temporary file name */
                        fp_tmpnam("Tmpfile3", "", tempfilename3);

                        fits_create_file(&tempfile, tempfilename3, &stat);

                        fits_get_hdu_num(inputfptr, &hdunum);
                        if (hdunum != 1) {

                            /* the input hdu is an image extension, so create dummy primary */
                            fits_create_img(tempfile, 8, 0, naxes, &stat);
                        }

                        fits_copy_header(inputfptr, tempfile, &stat); /* copy the header */

                        /* rescale the data, so that it will compress more efficiently */
                        if (bitpix == LONG_IMG)
                            fp_i4rescale(inputfptr, naxis, naxes, rescale, tempfile, &stat);
                        else
                            fp_i2rescale(inputfptr, naxis, naxes, rescale, tempfile, &stat);

                        /* scale the BSCALE keyword by the inverse factor */

                        bscale = bscale * rescale;
                        fits_update_key(tempfile, TDOUBLE, "BSCALE", &bscale, 0, &stat);

                        /* rescan the header, to reset the actual scaling parameters */
                        fits_set_hdustruc(tempfile, &stat);

                        infptr = tempfile;
                        rescale_flag = 1;
                    }
                }
            }

            if (!rescale_flag)   /* just compress the input file, without rescaling */
                infptr = inputfptr;

            /* compute basic statistics about the input image */
            if (bitpix == BYTE_IMG) {
                bpix = 8;
                strncpy(dtype, "8  ", sizeof(dtype)/sizeof(dtype[0]));
                fp_i2stat(infptr, naxis, naxes, &imagestats, &stat);
            } else if (bitpix == SHORT_IMG) {
                bpix = 16;
                strncpy(dtype, "16 ", sizeof(dtype)/sizeof(dtype[0]));
                fp_i2stat(infptr, naxis, naxes, &imagestats, &stat);
            } else if (bitpix == LONG_IMG) {
                bpix = 32;
                strncpy(dtype, "32 ", sizeof(dtype)/sizeof(dtype[0]));
                fp_i4stat(infptr, naxis, naxes, &imagestats, &stat);
            } else if (bitpix == LONGLONG_IMG) {
                bpix = 64;
                strncpy(dtype, "64 ", sizeof(dtype)/sizeof(dtype[0]));
            } else if (bitpix == FLOAT_IMG)   {
                bpix = 32;
                strncpy(dtype, "-32", sizeof(dtype)/sizeof(dtype[0]));
                fp_r4stat(infptr, naxis, naxes, &imagestats, &stat);
            } else if (bitpix == DOUBLE_IMG)  {
                bpix = 64;
                strncpy(dtype, "-64", sizeof(dtype)/sizeof(dtype[0]));
                fp_r4stat(infptr, naxis, naxes, &imagestats, &stat);
            }
            else dtype[0] = '\0';

            /* use the minimum of the MAD 2nd, 3rd, and 5th order noise estimates */
            noisemin = imagestats.noise3;
            if (imagestats.noise2 != 0. && imagestats.noise2 < noisemin) noisemin = imagestats.noise2;
            if (imagestats.noise5 != 0. && imagestats.noise5 < noisemin) noisemin = imagestats.noise5;

            xbits = (float) (log10(noisemin)/.301 + 1.792);

            printf("\n File: %s\n", infits);
            printf("  Ext BITPIX Dimens.   Nulls    Min    Max     Mean    Sigma  Noise2  Noise3  Noise5  Nbits   MaxR\n");

            printf("  %3d  %s", extnum, dtype);
            snprintf(dimen,100," (%ld", naxes[0]);
            len =strlen(dimen);
            for (ii = 1; ii < naxis; ii++) {
                if (len < 99)
                    snprintf(dimen+len,100-len,",%ld", naxes[ii]);
                len =strlen(dimen);
            }
            if (strlen(dimen)<99)
                strcat(dimen, ")");
            printf("%-12s",dimen);

            fits_get_hduaddr(inputfptr, &headstart, &datastart, &dataend, &stat);
            origdata = (float) ((dataend - datastart)/1000000.);

            /* get elapsed and cpu times need to read the uncompressed image */
            fits_read_image_speed (infptr, &whole_elapse, &whole_cpu,
                                   &row_elapse, &row_cpu, &stat);

            printf(" %5d %6.0f %6.0f %8.1f %#8.2g %#7.3g %#7.3g %#7.3g %#5.1f %#6.2f\n",
                   imagestats.n_nulls, imagestats.minval, imagestats.maxval,
                   imagestats.mean, imagestats.sigma,
                   imagestats.noise2, imagestats.noise3, imagestats.noise5, xbits, bpix/xbits);

            printf("\n       Type   Ratio       Size (MB)     Pk (Sec) UnPk Exact ElpN CPUN  Elp1  CPU1\n");

            printf("       Native                                             %5.3f %5.3f %5.3f %5.3f\n",
                   whole_elapse, whole_cpu, row_elapse, row_cpu);

            if (fpvar.outfile[0]) {
                fprintf(outreport,
                        " %s  %d %d %ld %ld %#10.4g %d %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g %#10.4g",
                        infits, extnum, bitpix, naxes[0], naxes[1], origdata, imagestats.n_nulls, imagestats.minval,
                        imagestats.maxval, imagestats.mean, imagestats.sigma,
                        imagestats.noise1, imagestats.noise2, imagestats.noise3, imagestats.noise5, whole_elapse, whole_cpu, row_elapse, row_cpu);
            }

            fits_set_lossy_int (outfptr, fpvar.int_to_float, &stat);
            if ( (bitpix > 0) && (fpvar.int_to_float != 0) ) {

                if ( (noisemin < (fpvar.n3ratio * fpvar.quantize_level) ) ||
                     (noisemin < fpvar.n3min)) {

                    /* image contains too little noise to quantize effectively */
                    fits_set_lossy_int (outfptr, 0, &stat);
                    fits_get_hdu_num(infptr, &hdunum);

                    printf("    HDU %d does not meet noise criteria to be quantized, so losslessly compressed.\n", hdunum);
                }
            }

            /* test compression ratio and speed for each algorithm */

            if (fpvar.quantize_level != 0) {

                fits_set_compression_type (outfptr, RICE_1, &stat);
                fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);
                if (fpvar.no_dither)
                    fits_set_quantize_method(outfptr, -1, &stat);
                else
                    fits_set_quantize_method(outfptr, fpvar.dither_method, &stat);

                fits_set_quantize_level (outfptr, fpvar.quantize_level, &stat);
                fits_set_dither_offset(outfptr, fpvar.dither_offset, &stat);
                fits_set_hcomp_scale (outfptr, fpvar.scale, &stat);
                fits_set_hcomp_smooth (outfptr, fpvar.smooth, &stat);

                fp_test_hdu(infptr, outfptr, outfptr2, fpvar, &stat);
            }

            if (fpvar.quantize_level != 0) {
                \
                fits_set_compression_type (outfptr, HCOMPRESS_1, &stat);
                fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);

                if (fpvar.no_dither)
                    fits_set_quantize_method(outfptr, -1, &stat);
                else
                    fits_set_quantize_method(outfptr, fpvar.dither_method, &stat);

                fits_set_quantize_level (outfptr, fpvar.quantize_level, &stat);
                fits_set_dither_offset(outfptr, fpvar.dither_offset, &stat);
                fits_set_hcomp_scale (outfptr, fpvar.scale, &stat);
                fits_set_hcomp_smooth (outfptr, fpvar.smooth, &stat);

                fp_test_hdu(infptr, outfptr, outfptr2, fpvar, &stat);
            }

            if (fpvar.comptype == GZIP_2) {
                fits_set_compression_type (outfptr, GZIP_2, &stat);
            } else {
                fits_set_compression_type (outfptr, GZIP_1, &stat);
            }

            fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);

            if (fpvar.no_dither)
                fits_set_quantize_method(outfptr, -1, &stat);
            else
                fits_set_quantize_method(outfptr, fpvar.dither_method, &stat);

            fits_set_quantize_level (outfptr, fpvar.quantize_level, &stat);
            fits_set_dither_offset(outfptr, fpvar.dither_offset, &stat);
            fits_set_hcomp_scale (outfptr, fpvar.scale, &stat);
            fits_set_hcomp_smooth (outfptr, fpvar.smooth, &stat);

            fp_test_hdu(infptr, outfptr, outfptr2, fpvar, &stat);

            /*
        fits_set_compression_type (outfptr, BZIP2_1, &stat);
        fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);
        fp_test_hdu(infptr, outfptr, outfptr2, fpvar, &stat);
*/
            /*
        fits_set_compression_type (outfptr, PLIO_1, &stat);
        fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);
        fp_test_hdu(infptr, outfptr, outfptr2, fpvar, &stat);
*/
            /*
                if (bitpix == SHORT_IMG || bitpix == LONG_IMG) {
          fits_set_compression_type (outfptr, NOCOMPRESS, &stat);
          fits_set_tile_dim (outfptr, 6, fpvar.ntile, &stat);
          fp_test_hdu(infptr, outfptr, outfptr2, fpvar, &stat);
        }
*/
            if (fpvar.outfile[0])
                fprintf(outreport,"\n");

            /* delete the temporary file */
            if (rescale_flag)  {
                fits_delete_file (infptr, &stat);
                tempfilename3[0] = '\0';   /* clear the temp filename */
            }
        } else if ( (hdutype == BINARY_TBL) && fpvar.do_tables) {

            fits_get_num_rowsll(inputfptr, &nrows, &stat);
            fits_get_num_cols(inputfptr, &ncols, &stat);
	    fp_test_table(inputfptr, outfptr, outfptr2, fpvar, &stat);

        } else {
            fits_copy_hdu (inputfptr, outfptr, 0, &stat);
            fits_copy_hdu (inputfptr, outfptr2, 0, &stat);
        }

        fits_movrel_hdu (inputfptr, 1, NULL, &stat);
        extnum++;
    }


    if (stat == END_OF_FILE) stat = 0;

    fits_close_file (outfptr2, &stat);
    fits_close_file (outfptr, &stat);
    fits_close_file (inputfptr, &stat);

    if (stat) {
        fits_report_error (stderr, stat);
    }
    return(0);
}
/*--------------------------------------------------------------------------*/
int fp_pack_hdu (fitsfile *infptr, fitsfile *outfptr, fpstate fpvar,
                 int *islossless, int *status)
{
    fitsfile *tempfile;
    long	naxes[9] = {1, 1, 1, 1, 1, 1, 1, 1, 1};
    int	stat=0, totpix=0, naxis=0, ii, hdutype, bitpix;
    int	tstatus, hdunum;
    double  bscale, rescale;

    char	outfits[SZ_STR], fzalgor[FLEN_VALUE];
    long 	headstart, datastart, dataend, datasize;
    double  noisemin;
    /* structure to hold image statistics (defined in fpack.h) */
    imgstats imagestats;

    if (*status) return(0);

    fits_get_hdu_type (infptr, &hdutype, &stat);

    if (hdutype == IMAGE_HDU) {
        fits_get_img_param (infptr, 9, &bitpix, &naxis, naxes, &stat);
        for (totpix=1, ii=0; ii < 9; ii++) totpix *= naxes[ii];
    }

    /* check directive keyword to see if this HDU should not be compressed */
    tstatus = 0;
    if (!fits_read_key(infptr, TSTRING, "FZALGOR", fzalgor, NULL, &tstatus) ) {
        if (!strcmp(fzalgor, "NONE") || !strcmp(fzalgor, "none") ) {
            fits_copy_hdu (infptr, outfptr, 0, &stat);

            *status = stat;
            return(0);
        }
    }

    /* =============================================================== */
    /* This block is only for  binary table compression */
    if (hdutype == BINARY_TBL && fpvar.do_tables) {

        fits_get_hduaddr(infptr, &headstart, &datastart, &dataend, status);
        datasize = dataend - datastart;

        if (datasize <= 2880) {
            /* data is less than 1 FITS block in size, so don't compress */
            fits_copy_hdu (infptr, outfptr, 0, &stat);
        } else {
            fits_compress_table (infptr, outfptr, &stat);
        }

        *status = stat;
        return(0);
    }
    /* =============================================================== */

    /* If this is not a non-null image HDU, just copy it verbatim */
    if (fits_is_compressed_image (infptr,  &stat) || hdutype != IMAGE_HDU ||
            naxis == 0 || totpix == 0 || !fpvar.do_images) {
        fits_copy_hdu (infptr, outfptr, 0, &stat);

    } else {  /* remaining code deals only with IMAGE HDUs */

        /* special case: rescale a scaled integer image to reduce noise? */
        if (fpvar.rescale_noise != 0. && bitpix > 0 && bitpix < LONGLONG_IMG) {

            tstatus = 0;
            fits_read_key(infptr, TDOUBLE, "BSCALE", &bscale, 0, &tstatus);
            if (tstatus == 0 && bscale != 1.0) {  /* image must be scaled */

                if (bitpix == LONG_IMG)
                    fp_i4stat(infptr, naxis, naxes, &imagestats, &stat);
                else
                    fp_i2stat(infptr, naxis, naxes, &imagestats, &stat);

                /* use the minimum of the MAD 2nd, 3rd, and 5th order noise estimates */
                noisemin = imagestats.noise3;
                if (imagestats.noise2 != 0. && imagestats.noise2 < noisemin) noisemin = imagestats.noise2;
                if (imagestats.noise5 != 0. && imagestats.noise5 < noisemin) noisemin = imagestats.noise5;

                rescale = noisemin / fpvar.rescale_noise;
                if (rescale > 1.0) {

                    /* all the criteria are met, so create a temporary file that */
                    /* contains a rescaled version of the image, in output directory */

                    /* create temporary file name */
                    fits_file_name(outfptr, outfits, &stat);  /* get the output file name */
                    fp_tmpnam("Tmp3", outfits, tempfilename3);

                    fits_create_file(&tempfile, tempfilename3, &stat);

                    fits_get_hdu_num(infptr, &hdunum);
                    if (hdunum != 1) {

                        /* the input hdu is an image extension, so create dummy primary */
                        fits_create_img(tempfile, 8, 0, naxes, &stat);
                    }

                    fits_copy_header(infptr, tempfile, &stat); /* copy the header */

                    /* rescale the data, so that it will compress more efficiently */
                    if (bitpix == LONG_IMG)
                        fp_i4rescale(infptr, naxis, naxes, rescale, tempfile, &stat);
                    else
                        fp_i2rescale(infptr, naxis, naxes, rescale, tempfile, &stat);


                    /* scale the BSCALE keyword by the inverse factor */

                    bscale = bscale * rescale;
                    fits_update_key(tempfile, TDOUBLE, "BSCALE", &bscale, 0, &stat);

                    /* rescan the header, to reset the actual scaling parameters */
                    fits_set_hdustruc(tempfile, &stat);

                    fits_img_compress (tempfile, outfptr, &stat);
                    fits_delete_file  (tempfile, &stat);
                    tempfilename3[0] = '\0';   /* clear the temp filename */
                    *islossless = 0;  /* used a lossy compression method */

                    *status = stat;
                    return(0);
                }
            }
        }

        /* if requested to do lossy compression of integer images (by */
        /* converting to float), then check if this HDU qualifies */
        if ( (bitpix > 0) && (fpvar.int_to_float != 0) ) {

            if (bitpix >= LONG_IMG)
                fp_i4stat(infptr, naxis, naxes, &imagestats, &stat);
            else
                fp_i2stat(infptr, naxis, naxes, &imagestats, &stat);

            /* rescan the image header to reset scaling values (changed by fp_iNstat) */
            ffrhdu(infptr, &hdutype, &stat);

            /* use the minimum of the MAD 2nd, 3rd, and 5th order noise estimates */
            noisemin = imagestats.noise3;
            if (imagestats.noise2 != 0. && imagestats.noise2 < noisemin) noisemin = imagestats.noise2;
            if (imagestats.noise5 != 0. && imagestats.noise5 < noisemin) noisemin = imagestats.noise5;

            if ( (noisemin < (fpvar.n3ratio * fpvar.quantize_level) ) ||
                 (imagestats.noise3 < fpvar.n3min)) {

                /* image contains too little noise to quantize effectively */
                fits_set_lossy_int (outfptr, 0, &stat);

                fits_get_hdu_num(infptr, &hdunum);

                printf("    HDU %d does not meet noise criteria to be quantized, so losslessly compressed.\n", hdunum);

            } else {
                /* compressed image is not identical to original */
                *islossless = 0;
            }
        }

        /* finally, do the actual image compression */
        fits_img_compress (infptr, outfptr, &stat);

        if (bitpix < 0 ||
                (fpvar.comptype == HCOMPRESS_1 && fpvar.scale != 0.)) {

            /* compressed image is not identical to original */
            *islossless = 0;
        }
    }

    *status = stat;
    return(0);
}

/*--------------------------------------------------------------------------*/
int fp_unpack_hdu (fitsfile *infptr, fitsfile *outfptr, fpstate fpvar, int *status)
{
    UNUSED(fpvar);

    int hdutype, lval;

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

    fits_get_hdu_type (infptr, &hdutype, status);

    /* =============================================================== */
    /* This block is only for beta testing of binary table compression */
    if (hdutype == BINARY_TBL) {

        fits_read_key(infptr, TLOGICAL, "ZTABLE", &lval, NULL, status);

        if (*status == 0 && lval != 0) {
            /*  uncompress the table */
            fits_uncompress_table (infptr, outfptr, status);
        } else {
            if (*status == KEY_NO_EXIST)  /* table is not compressed */
                *status = 0;
            fits_copy_hdu (infptr, outfptr, 0, status);
        }

        return(0);
        /* =============================================================== */

    } else if (fits_is_compressed_image (infptr,  status)) {
        /* uncompress the compressed image HDU */
        fits_img_decompress (infptr, outfptr, status);
    } else {
        /* not a compressed image HDU, so just copy it to the output */
        fits_copy_hdu (infptr, outfptr, 0, status);
    }

    return(0);
}
/*--------------------------------------------------------------------------*/
int fits_read_image_speed (fitsfile *infptr, float *whole_elapse,
                           float *whole_cpu, float *row_elapse, float *row_cpu, int *status)
{
    unsigned char *carray, cnull = 0;
    short *sarray, snull=0;
    int bitpix, naxis, anynull, *iarray, inull = 0;
    long ii, naxes[9], fpixel[9]={1,1,1,1,1,1,1,1,1}, lpixel[9]={1,1,1,1,1,1,1,1,1};
    long inc[9]={1,1,1,1,1,1,1,1,1} ;
    float *earray, enull = 0, filesize;
    double *darray, dnull = 0;

    if (*status) return(*status);

    fits_get_img_param (infptr, 9, &bitpix, &naxis, naxes, status);

    if (naxis != 2)return(*status);

    lpixel[0] = naxes[0];
    lpixel[1] = naxes[1];

    /* filesize in MB */
    filesize = (float) (naxes[0] * abs(bitpix) / 8000000. * naxes[1]);

    /* measure time required to read the raw image */
    fits_set_bscale(infptr, 1.0, 0.0, status);
    *whole_elapse = 0.;
    *whole_cpu = 0;

    if (bitpix == BYTE_IMG) {
        carray = calloc(naxes[1]*naxes[0], sizeof(char));

        /* remove any cached uncompressed tile
          (dangerous to directly modify the structure!) */
        /*       (infptr->Fptr)->tilerow = 0; */

        marktime(status);
        fits_read_subset(infptr, TBYTE, fpixel, lpixel, inc, &cnull,
                         carray, &anynull, status);

        /* get elapsped times */
        gettime(whole_elapse, whole_cpu, status);

        /* now read the image again, row by row */
        if (row_elapse) {

            /* remove any cached uncompressed tile
            (dangerous to directly modify the structure!) */
            /*        (infptr->Fptr)->tilerow = 0; */

            marktime(status);
            for (ii = 0; ii < naxes[1]; ii++) {
                fpixel[1] = ii+1;
                fits_read_pix(infptr, TBYTE, fpixel, naxes[0], &cnull,
                        carray, &anynull, status);
            }
            /* get elapsped times */
            gettime(row_elapse, row_cpu, status);
        }
        free(carray);

    } else if (bitpix == SHORT_IMG) {
        sarray = calloc(naxes[0]*naxes[1], sizeof(short));

        marktime(status);
        fits_read_subset(infptr, TSHORT, fpixel, lpixel, inc, &snull,
                         sarray, &anynull, status);

        gettime(whole_elapse, whole_cpu, status);   /* get elapsped times */

        /* now read the image again, row by row */
        if (row_elapse) {
            marktime(status);
            for (ii = 0; ii < naxes[1]; ii++) {

                fpixel[1] = ii+1;
                fits_read_pix(infptr, TSHORT, fpixel, naxes[0], &snull,
                        sarray, &anynull, status);
            }
            /* get elapsped times */
            gettime(row_elapse, row_cpu, status);
        }

        free(sarray);

    } else if (bitpix == LONG_IMG) {
        iarray = calloc(naxes[0]*naxes[1], sizeof(int));

        marktime(status);

        fits_read_subset(infptr, TINT, fpixel, lpixel, inc, &inull,
                         iarray, &anynull, status);

        /* get elapsped times */
        gettime(whole_elapse, whole_cpu, status);


        /* now read the image again, row by row */
        if (row_elapse) {
            marktime(status);
            for (ii = 0; ii < naxes[1]; ii++) {
                fpixel[1] = ii+1;
                fits_read_pix(infptr, TINT, fpixel, naxes[0], &inull,
                        iarray, &anynull, status);
            }
            /* get elapsped times */
            gettime(row_elapse, row_cpu, status);
        }


        free(iarray);

    } else if (bitpix == FLOAT_IMG)   {
        earray = calloc(naxes[1]*naxes[0], sizeof(float));

        marktime(status);

        fits_read_subset(infptr, TFLOAT, fpixel, lpixel, inc, &enull,
                         earray, &anynull, status);

        /* get elapsped times */
        gettime(whole_elapse, whole_cpu, status);

        /* now read the image again, row by row */
        if (row_elapse) {
            marktime(status);
            for (ii = 0; ii < naxes[1]; ii++) {
                fpixel[1] = ii+1;
                fits_read_pix(infptr, TFLOAT, fpixel, naxes[0], &enull,
                        earray, &anynull, status);
            }
            /* get elapsped times */
            gettime(row_elapse, row_cpu, status);
        }

        free(earray);

    } else if (bitpix == DOUBLE_IMG)  {
        darray = calloc(naxes[1]*naxes[0], sizeof(double));

        marktime(status);

        fits_read_subset(infptr, TDOUBLE, fpixel, lpixel, inc, &dnull,
                         darray, &anynull, status);

        /* get elapsped times */
        gettime(whole_elapse, whole_cpu, status);

        /* now read the image again, row by row */
        if (row_elapse) {
            marktime(status);
            for (ii = 0; ii < naxes[1]; ii++) {
                fpixel[1] = ii+1;
                fits_read_pix(infptr, TDOUBLE, fpixel, naxes[0], &dnull,
                        darray, &anynull, status);
            }
            /* get elapsped times */
            gettime(row_elapse, row_cpu, status);
        }

        free(darray);
    }

    if (whole_elapse) *whole_elapse = *whole_elapse / filesize;
    if (row_elapse)   *row_elapse   = *row_elapse / filesize;
    if (whole_cpu)    *whole_cpu    = *whole_cpu / filesize;
    if (row_cpu)      *row_cpu      = *row_cpu / filesize;

    return(*status);
}
/*--------------------------------------------------------------------------*/
int fp_test_hdu (fitsfile *infptr, fitsfile *outfptr, fitsfile *outfptr2,
                 fpstate fpvar, int *status)
{
    /*   This routine is only used for performance testing of image HDUs. */
    /*   Use fp_test_table for testing binary table HDUs.    */

    int stat = 0, hdutype, comptype;
    char ctype[20], lossless[4];
    long headstart, datastart, dataend;
    float origdata = 0., compressdata = 0.;
    float compratio = 0., packcpu = 0., unpackcpu = 0.;
    float elapse, whole_elapse, row_elapse, whole_cpu, row_cpu;
    unsigned long datasum1, datasum2, hdusum;

    if (*status) return(0);

    origdata = 0;
    compressdata = 0;
    compratio = 0.;
    lossless[0] = '\0';

    fits_get_compression_type(outfptr, &comptype, &stat);
    if (comptype == RICE_1)
        strcpy(ctype, "RICE");
    else if (comptype == GZIP_1)
        strcpy(ctype, "GZIP1");
    else if (comptype == GZIP_2)
        strcpy(ctype, "GZIP2");/*
    else if (comptype == BZIP2_1)
        strcpy(ctype, "BZIP2");
*/
    else if (comptype == PLIO_1)
        strcpy(ctype, "PLIO");
    else if (comptype == HCOMPRESS_1)
        strcpy(ctype, "HCOMP");
    else if (comptype == NOCOMPRESS)
        strcpy(ctype, "NONE");
    else {
        fp_msg ("Error: unsupported image compression type ");
        *status = DATA_COMPRESSION_ERR;
        return(0);
    }

    /* -------------- COMPRESS the image ------------------ */

    marktime(&stat);

    fits_img_compress (infptr, outfptr, &stat);

    /* get elapsped times */
    gettime(&elapse, &packcpu, &stat);

    /* get elapsed and cpu times need to read the compressed image */
    fits_read_image_speed (outfptr, &whole_elapse, &whole_cpu,
                           &row_elapse, &row_cpu, &stat);

    if (!stat) {

        /* -------------- UNCOMPRESS the image ------------------ */

        /* remove any cached uncompressed tile
          (dangerous to directly modify the structure!) */
        /*        (outfptr->Fptr)->tilerow = 0; */
        marktime(&stat);

        fits_img_decompress (outfptr, outfptr2, &stat);

        /* get elapsped times */
        gettime(&elapse, &unpackcpu, &stat);

        /* ----------------------------------------------------- */


        /* get sizes of original and compressed images */

        fits_get_hduaddr(infptr, &headstart, &datastart, &dataend, &stat);
        origdata = (float) ((dataend - datastart)/1000000.);

        fits_get_hduaddr(outfptr, &headstart, &datastart, &dataend, &stat);
        compressdata = (float) ((dataend - datastart)/1000000.);

        if (compressdata != 0)
            compratio = (float) origdata / (float) compressdata;

        /* is this uncompressed image identical to the original? */

        fits_get_chksum(infptr, &datasum1, &hdusum, &stat);
        fits_get_chksum(outfptr2, &datasum2, &hdusum, &stat);

        if ( datasum1 == datasum2) {
            strcpy(lossless, "Yes");
        } else {
            strcpy(lossless, "No");
        }

        printf("       %-5s %6.2f %7.2f ->%7.2f %7.2f %7.2f %s %5.3f %5.3f %5.3f %5.3f\n",
               ctype, compratio, origdata, compressdata,
               packcpu, unpackcpu, lossless, whole_elapse, whole_cpu,
               row_elapse, row_cpu);


        if (fpvar.outfile[0]) {
            fprintf(outreport," %6.3f %5.2f %5.2f %s %7.3f %7.3f %7.3f %7.3f",
                    compratio, packcpu, unpackcpu, lossless,  whole_elapse, whole_cpu,
                    row_elapse, row_cpu);
        }

        /* delete the output HDUs to concerve disk space */

        fits_delete_hdu(outfptr, &hdutype, &stat);
        fits_delete_hdu(outfptr2, &hdutype, &stat);

    } else {
        printf("       %-5s     (unable to compress image)\n", ctype);
    }

    /* try to recover from any compression errors */
    if (stat == DATA_COMPRESSION_ERR) stat = 0;

    *status = stat;
    return(0);
}
/*--------------------------------------------------------------------------*/
int fp_test_table (fitsfile *infptr, fitsfile *outfptr, fitsfile *outfptr2,
                   fpstate fpvar, int *status)
{
    /* this routine is for performance testing of the table compression methods */
    UNUSED(fpvar);
    UNUSED(outfptr2);

    int stat = 0, hdutype, tstatus = 0;
    char fzalgor[FLEN_VALUE];
    LONGLONG headstart, datastart, dataend;
    float elapse, cpu;

    if (*status) return(0);

    /* check directive keyword to see if this HDU should not be compressed */
    if (!fits_read_key(infptr, TSTRING, "FZALGOR", fzalgor, NULL, &tstatus) ) {
        if (!strcmp(fzalgor, "NONE")  || !strcmp(fzalgor, "none")) {
            return(0);
        }
    }

    fits_get_hduaddrll(infptr, &headstart, &datastart, &dataend, status);

    /* can't compress small tables with less than 2880 bytes of data */
    if (dataend - datastart <= 2880) {
        return(0);
    }

    marktime(&stat);
    stat= -999;  /* set special flag value */
    fits_compress_table (infptr, outfptr,  &stat);

    /* get elapsped times */
    gettime(&elapse, &cpu, &stat);

    fits_delete_hdu(outfptr, &hdutype, &stat);

    printf("\nElapsed time = %f, cpu = %f\n", elapse, cpu);

    fits_report_error (stderr, stat);

    return(0);
}
/*--------------------------------------------------------------------------*/
int marktime(int *status)
{
#if defined(unix) || defined(__unix__)  || defined(__unix)
    struct  timeval tv;
    /*        struct  timezone tz; */

    /*        gettimeofday (&tv, &tz); */
    gettimeofday (&tv, NULL);

    startsec = tv.tv_sec;
    startmilli = tv.tv_usec/1000;

    scpu = clock();
#else
    /* don't support high timing precision on Windows machines */
    startsec = 0;
    startmilli = 0;

    scpu = clock();
#endif
    return( *status );
}
/*--------------------------------------------------------------------------*/
int gettime(float *elapse, float *elapscpu, int *status)
{
#if defined(unix) || defined(__unix__)  || defined(__unix)
    struct  timeval tv;
    /*        struct  timezone tz; */
    int stopmilli;
    long stopsec;

    /*        gettimeofday (&tv, &tz); */
    gettimeofday (&tv, NULL);
    ecpu = clock();

    stopmilli = tv.tv_usec/1000;
    stopsec = tv.tv_sec;

    *elapse = (stopsec - startsec) + (stopmilli - startmilli)/1000.;
    *elapscpu = (ecpu - scpu) * 1.0 / CLOCKTICKS;
    /*
printf(" (start: %ld + %d), stop: (%ld + %d) elapse: %f\n ",
startsec,startmilli,stopsec, stopmilli, *elapse);
*/
#else
    /* set the elapsed time the same as the CPU time on Windows machines */
    *elapscpu = (float) ((ecpu - scpu) * 1.0 / CLOCKTICKS);
    *elapse = *elapscpu;
#endif
    return( *status );
}
/*--------------------------------------------------------------------------*/
int fp_i2stat(fitsfile *infptr, int naxis, long *naxes, imgstats *imagestats, int *status)
{
    /*
    read the central XSAMPLE by YSAMPLE region of pixels in the int*2 image,
    and then compute basic statistics: min, max, mean, sigma, mean diff, etc.
*/

    long fpixel[9] = {1,1,1,1,1,1,1,1,1};
    long lpixel[9] = {1,1,1,1,1,1,1,1,1};
    long inc[9]    = {1,1,1,1,1,1,1,1,1};
    long i1, i2, npix, ngood, nx, ny;
    short *intarray, minvalue, maxvalue, nullvalue;
    int anynul, tstatus, checknull = 1;
    double mean, sigma, noise1, noise2, noise3, noise5;

    /* select the middle XSAMPLE by YSAMPLE area of the image */
    i1 = naxes[0]/2 - (XSAMPLE/2 - 1);
    i2 = naxes[0]/2 + (XSAMPLE/2);
    if (i1 < 1) i1 = 1;
    if (i2 > naxes[0]) i2 = naxes[0];
    fpixel[0] = i1;
    lpixel[0] = i2;
    nx = i2 - i1 +1;

    if (naxis > 1) {
        i1 = naxes[1]/2 - (YSAMPLE/2 - 1);
        i2 = naxes[1]/2 + (YSAMPLE/2);
        if (i1 < 1) i1 = 1;
        if (i2 > naxes[1]) i2 = naxes[1];
        fpixel[1] = i1;
        lpixel[1] = i2;
    }
    ny = i2 - i1 +1;

    npix = nx * ny;

    /* if there are higher dimensions, read the middle plane of the cube */
    if (naxis > 2) {
        fpixel[2] = naxes[2]/2 + 1;
        lpixel[2] = naxes[2]/2 + 1;
    }

    intarray = calloc(npix, sizeof(short));
    if (!intarray) {
        *status = MEMORY_ALLOCATION;
        return(*status);
    }

    /* turn off any scaling of the integer pixel values */
    fits_set_bscale(infptr, 1.0, 0.0, status);

    fits_read_subset_sht(infptr, 0, naxis, naxes, fpixel, lpixel, inc,
                         0, intarray, &anynul, status);

    /* read the null value keyword (BLANK) if present */
    tstatus = 0;
    fits_read_key(infptr, TSHORT, "BLANK", &nullvalue, 0, &tstatus);
    if (tstatus) {
        nullvalue = 0;
        checknull = 0;
    }

    /* compute statistics of the image */

    fits_img_stats_short(intarray, nx, ny, checknull, nullvalue,
                         &ngood, &minvalue, &maxvalue, &mean, &sigma, &noise1, &noise2, &noise3, &noise5, status);

    imagestats->n_nulls = npix - ngood;
    imagestats->minval = minvalue;
    imagestats->maxval = maxvalue;
    imagestats->mean = mean;
    imagestats->sigma = sigma;
    imagestats->noise1 = noise1;
    imagestats->noise2 = noise2;
    imagestats->noise3 = noise3;
    imagestats->noise5 = noise5;

    free(intarray);
    return(*status);
}
/*--------------------------------------------------------------------------*/
int fp_i4stat(fitsfile *infptr, int naxis, long *naxes, imgstats *imagestats, int *status)
{
    /*
    read the central XSAMPLE by YSAMPLE region of pixels in the int*2 image,
    and then compute basic statistics: min, max, mean, sigma, mean diff, etc.
*/

    long fpixel[9] = {1,1,1,1,1,1,1,1,1};
    long lpixel[9] = {1,1,1,1,1,1,1,1,1};
    long inc[9]    = {1,1,1,1,1,1,1,1,1};
    long i1, i2, npix, ngood, nx, ny;
    int *intarray, minvalue, maxvalue, nullvalue;
    int anynul, tstatus, checknull = 1;
    double mean, sigma, noise1, noise2, noise3, noise5;

    /* select the middle XSAMPLE by YSAMPLE area of the image */
    i1 = naxes[0]/2 - (XSAMPLE/2 - 1);
    i2 = naxes[0]/2 + (XSAMPLE/2);
    if (i1 < 1) i1 = 1;
    if (i2 > naxes[0]) i2 = naxes[0];
    fpixel[0] = i1;
    lpixel[0] = i2;
    nx = i2 - i1 +1;

    if (naxis > 1) {
        i1 = naxes[1]/2 - (YSAMPLE/2 - 1);
        i2 = naxes[1]/2 + (YSAMPLE/2);
        if (i1 < 1) i1 = 1;
        if (i2 > naxes[1]) i2 = naxes[1];
        fpixel[1] = i1;
        lpixel[1] = i2;
    }
    ny = i2 - i1 +1;

    npix = nx * ny;

    /* if there are higher dimensions, read the middle plane of the cube */
    if (naxis > 2) {
        fpixel[2] = naxes[2]/2 + 1;
        lpixel[2] = naxes[2]/2 + 1;
    }

    intarray = calloc(npix, sizeof(int));
    if (!intarray) {
        *status = MEMORY_ALLOCATION;
        return(*status);
    }

    /* turn off any scaling of the integer pixel values */
    fits_set_bscale(infptr, 1.0, 0.0, status);

    fits_read_subset_int(infptr, 0, naxis, naxes, fpixel, lpixel, inc,
                         0, intarray, &anynul, status);

    /* read the null value keyword (BLANK) if present */
    tstatus = 0;
    fits_read_key(infptr, TINT, "BLANK", &nullvalue, 0, &tstatus);
    if (tstatus) {
        nullvalue = 0;
        checknull = 0;
    }

    /* compute statistics of the image */

    fits_img_stats_int(intarray, nx, ny, checknull, nullvalue,
                       &ngood, &minvalue, &maxvalue, &mean, &sigma, &noise1, &noise2, &noise3, &noise5, status);

    imagestats->n_nulls = npix - ngood;
    imagestats->minval = minvalue;
    imagestats->maxval = maxvalue;
    imagestats->mean = mean;
    imagestats->sigma = sigma;
    imagestats->noise1 = noise1;
    imagestats->noise2 = noise2;
    imagestats->noise3 = noise3;
    imagestats->noise5 = noise5;

    free(intarray);
    return(*status);
}
/*--------------------------------------------------------------------------*/
int fp_r4stat(fitsfile *infptr, int naxis, long *naxes, imgstats *imagestats, int *status)
{
    /*
    read the central XSAMPLE by YSAMPLE region of pixels in the int*2 image,
    and then compute basic statistics: min, max, mean, sigma, mean diff, etc.
*/

    long fpixel[9] = {1,1,1,1,1,1,1,1,1};
    long lpixel[9] = {1,1,1,1,1,1,1,1,1};
    long inc[9]    = {1,1,1,1,1,1,1,1,1};
    long i1, i2, npix, ngood, nx, ny;
    float *array, minvalue, maxvalue, nullvalue = FLOATNULLVALUE;
    int anynul,checknull = 1;
    double mean, sigma, noise1, noise2, noise3, noise5;

    /* select the middle XSAMPLE by YSAMPLE area of the image */
    i1 = naxes[0]/2 - (XSAMPLE/2 - 1);
    i2 = naxes[0]/2 + (XSAMPLE/2);
    if (i1 < 1) i1 = 1;
    if (i2 > naxes[0]) i2 = naxes[0];
    fpixel[0] = i1;
    lpixel[0] = i2;
    nx = i2 - i1 +1;

    if (naxis > 1) {
        i1 = naxes[1]/2 - (YSAMPLE/2 - 1);
        i2 = naxes[1]/2 + (YSAMPLE/2);
        if (i1 < 1) i1 = 1;
        if (i2 > naxes[1]) i2 = naxes[1];
        fpixel[1] = i1;
        lpixel[1] = i2;
    }
    ny = i2 - i1 +1;

    npix = nx * ny;

    /* if there are higher dimensions, read the middle plane of the cube */
    if (naxis > 2) {
        fpixel[2] = naxes[2]/2 + 1;
        lpixel[2] = naxes[2]/2 + 1;
    }

    array = calloc(npix, sizeof(float));
    if (!array) {
        *status = MEMORY_ALLOCATION;
        return(*status);
    }

    fits_read_subset_flt(infptr, 0, naxis, naxes, fpixel, lpixel, inc,
                         nullvalue, array, &anynul, status);

    /* are there any null values in the array? */
    if (!anynul) {
        nullvalue = 0.;
        checknull = 0;
    }

    /* compute statistics of the image */

    fits_img_stats_float(array, nx, ny, checknull, nullvalue,
                         &ngood, &minvalue, &maxvalue, &mean, &sigma, &noise1, &noise2, &noise3, &noise5, status);

    imagestats->n_nulls = npix - ngood;
    imagestats->minval = minvalue;
    imagestats->maxval = maxvalue;
    imagestats->mean = mean;
    imagestats->sigma = sigma;
    imagestats->noise1 = noise1;
    imagestats->noise2 = noise2;
    imagestats->noise3 = noise3;
    imagestats->noise5 = noise5;

    free(array);
    return(*status);
}
/*--------------------------------------------------------------------------*/
int fp_i2rescale(fitsfile *infptr, int naxis, long *naxes, double rescale,
                 fitsfile *outfptr, int *status)
{
    /*
    divide the integer pixel values in the input file by rescale,
    and write back out to the output file..
*/

    long ii, jj, nelem = 1, nx, ny;
    short *intarray, nullvalue;
    int anynul, tstatus, checknull = 1;

    nx = naxes[0];
    ny = 1;

    for (ii = 1; ii < naxis; ii++) {
        ny = ny * naxes[ii];
    }

    intarray = calloc(nx, sizeof(short));
    if (!intarray) {
        *status = MEMORY_ALLOCATION;
        return(*status);
    }

    /* read the null value keyword (BLANK) if present */
    tstatus = 0;
    fits_read_key(infptr, TSHORT, "BLANK", &nullvalue, 0, &tstatus);
    if (tstatus) {
        checknull = 0;
    }

    /* turn off any scaling of the integer pixel values */
    fits_set_bscale(infptr,  1.0, 0.0, status);
    fits_set_bscale(outfptr, 1.0, 0.0, status);

    for (ii = 0; ii < ny; ii++) {

        fits_read_img_sht(infptr, 1, nelem, nx,
                          0, intarray, &anynul, status);

        if (checknull) {
            for (jj = 0; jj < nx; jj++) {
                if (intarray[jj] != nullvalue)
                    intarray[jj] = NSHRT( (intarray[jj] / rescale) );
            }
        } else {
            for (jj = 0; jj < nx; jj++)
                intarray[jj] = NSHRT( (intarray[jj] / rescale) );
        }

        fits_write_img_sht(outfptr, 1, nelem, nx, intarray, status);

        nelem += nx;
    }

    free(intarray);
    return(*status);
}
/*--------------------------------------------------------------------------*/
int fp_i4rescale(fitsfile *infptr, int naxis, long *naxes, double rescale,
                 fitsfile *outfptr, int *status)
{
    /*
    divide the integer pixel values in the input file by rescale,
    and write back out to the output file..
*/

    long ii, jj, nelem = 1, nx, ny;
    int *intarray, nullvalue;
    int anynul, tstatus, checknull = 1;

    nx = naxes[0];
    ny = 1;

    for (ii = 1; ii < naxis; ii++) {
        ny = ny * naxes[ii];
    }

    intarray = calloc(nx, sizeof(int));
    if (!intarray) {
        *status = MEMORY_ALLOCATION;
        return(*status);
    }

    /* read the null value keyword (BLANK) if present */
    tstatus = 0;
    fits_read_key(infptr, TINT, "BLANK", &nullvalue, 0, &tstatus);
    if (tstatus) {
        checknull = 0;
    }

    /* turn off any scaling of the integer pixel values */
    fits_set_bscale(infptr,  1.0, 0.0, status);
    fits_set_bscale(outfptr, 1.0, 0.0, status);

    for (ii = 0; ii < ny; ii++) {

        fits_read_img_int(infptr, 1, nelem, nx,
                          0, intarray, &anynul, status);

        if (checknull) {
            for (jj = 0; jj < nx; jj++) {
                if (intarray[jj] != nullvalue)
                    intarray[jj] = NINT( (intarray[jj] / rescale) );
            }
        } else {
            for (jj = 0; jj < nx; jj++)
                intarray[jj] = NINT( (intarray[jj] / rescale) );
        }

        fits_write_img_int(outfptr, 1, nelem, nx, intarray, status);

        nelem += nx;
    }

    free(intarray);
    return(*status);
}
/* ========================================================================
 * Signal and error handler.
 */
void abort_fpack(int sig)
{
    /* clean up by deleting temporary files */
    UNUSED(sig);

    if (tempfilename[0]) {
        remove(tempfilename);
    }
    if (tempfilename2[0]) {
        remove(tempfilename2);
    }
    if (tempfilename3[0]) {
        remove(tempfilename3);
    }
    exit(-1);
}
