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/*** File libwcs/daoread.c
*** March 20, 1997
*** By Doug Mink, dmink@cfa.harvard.edu
*** Harvard-Smithsonian Center for Astrophysics
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <sys/types.h>
#include <sys/stat.h>
static int nlines; /* Number of lines in catalog */
#define ABS(a) ((a) < 0 ? (-(a)) : (a))
static int daoopen();
static char *daoline();
static char newline = 10;
static char *daobuff;
/* DAOREAD -- Read DAOFIND file of star positions in an image */
int
daoread (daocat, xa, ya, ba, pa, nlog)
char *daocat; /* Name of DAOFIND catalog file */
double **xa, **ya; /* X and Y coordinates of stars, array returned */
double **ba; /* Fluxes of stars in counts, array returned */
int **pa; /* Peak counts of stars in counts, array returned */
int nlog; /* 1 to print each star's position */
{
int nstars;
double xi, yi, magi;
double flux;
int iline;
char *line;
line = 0;
nstars = 0;
if (daoopen (daocat) > 0) {
line = daobuff;
/* Loop through catalog */
for (iline = 1; iline <= nlines; iline++) {
line = daoline (iline, line);
if (line == NULL) {
fprintf (stderr,"DAOREAD: Cannot read line %d\n", iline);
break;
}
else if (line[0] != '#') {
/* Extract X, Y, magnitude */
sscanf (line,"%lg %lg %lg", &xi, &yi, &magi);
/* Save star position, scaled flux, and magnitude in table */
nstars++;
*xa= (double *) realloc(*xa, nstars*sizeof(double));
*ya= (double *) realloc(*ya, nstars*sizeof(double));
*ba= (double *) realloc(*ba, nstars*sizeof(double));
*pa= (int *) realloc(*pa, nstars*sizeof(int));
(*xa)[nstars-1] = xi;
(*ya)[nstars-1] = yi;
flux = 10000.0 * pow (10.0, (-magi / 2.5));
(*ba)[nstars-1] = flux;
(*pa)[nstars-1] = (int)(magi * 100.0);
if (nlog == 1)
fprintf (stderr,"DAOREAD: %6d: %9.5f %9.5f %15.2f %6.2f\n",
nstars,xi,yi,flux,magi);
}
/* Log operation */
if (nlog > 0 && iline%nlog == 0)
fprintf (stderr,"DAOREAD: %5d / %5d / %5d stars from catalog %s\r",
nstars, iline, nlines, daocat);
/* End of star loop */
}
/* End of open catalog file */
}
/* Summarize search */
if (nlog > 0)
fprintf (stderr,"DAOREAD: Catalog %s : %d / %d / %d found\n",
daocat, nstars, iline, nlines);
free (daobuff);
return (nstars);
}
/* DAOOPEN -- Open DAOFIND catalog, returning number of entries */
static int
daoopen (daofile)
char *daofile; /* DAOFIND catalog file name */
{
struct stat statbuff;
FILE *fcat;
int nr, lfile;
char *daonew;
/* Find length of DAOFIND catalog */
if (stat (daofile, &statbuff)) {
fprintf (stderr,"DAOOPEN: DAOFIND catalog %s has no entries\n",daofile);
return (0);
}
else
lfile = (int) statbuff.st_size;
/* Open DAOFIND catalog */
if (!(fcat = fopen (daofile, "r"))) {
fprintf (stderr,"DAOOPEN: DAOFIND catalog %s cannot be read\n",daofile);
return (0);
}
/* Allocate buffer to hold entire catalog and read it */
if ((daobuff = malloc (lfile)) != NULL) {
nr = fread (daobuff, 1, lfile, fcat);
if (nr < lfile) {
fprintf (stderr,"DAOOPEN: read only %d / %d bytes of file %s\n",
nr, lfile, daofile);
(void) fclose (fcat);
return (0);
}
/* Enumerate entries in DAOFIND catalog by counting newlines */
daonew = daobuff;
nlines = 0;
while ((daonew = strchr (daonew, newline)) != NULL) {
daonew = daonew + 1;
nlines = nlines + 1;
}
}
(void) fclose (fcat);
return (nlines);
}
/* DAOLINE -- Get DAOFIND catalog entry for one star; return 0 if successful */
static char *
daoline (iline, line)
int iline; /* Star sequence number in DAOFIND catalog */
char *line; /* Pointer to iline'th entry (returned updated) */
{
char *nextline;
int i;
if (iline > nlines) {
fprintf (stderr, "DAOSTAR: %d is not in catalog\n",iline);
return (NULL);
}
else if (iline < 1 && line) {
nextline = strchr (line, newline) + 1;
}
else {
nextline = daobuff;
for (i = 1; i < iline; i++) {
nextline = strchr (nextline, newline) + 1;
}
}
return (nextline);
}
/* Dec 11 1996 New subroutines
*
* Mar 20 1997 Removed unused variables, fixed logging after lint
*/
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