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/*** File libwcs/fileutil.c
*** October 21, 1999
*** By Doug Mink, dmink@cfa.harvard.edu
*** Harvard-Smithsonian Center for Astrophysics
* Module: fileutil.c (ASCII file utilities)
* Purpose: Find out things about ASCII files
* Subroutine: getfilelines (filename)
* Return number of lines in an ASCII file
* Subroutine: getfilebuff (filename)
* Return entire file contents in a character string
* Subroutine: getfilesize (filename)
* Return size of a binary or ASCII file
* Subroutine: isimlist (filename)
* Return 1 if file is list of FITS or IRAF image files, else 0
* Copyright: 1999 Smithsonian Astrophysical Observatory
* You may do anything you like with this file except remove
* this copyright. The Smithsonian Astrophysical Observatory
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#include <stdlib.h>
#ifndef VMS
#include <unistd.h>
#endif
#include <stdio.h>
#include <fcntl.h>
#include <sys/file.h>
#include <errno.h>
#include <string.h>
#include "fitsfile.h"
/* GETFILELINES -- return number of lines in one file */
int
getfilelines (filename)
char *filename; /* Name of file for which to find number of lines */
{
char *buffer, *bufline;
int nlines = 0;
char newline = 10;
/* Read file */
buffer = getfilebuff (filename);
/* Count lines in file */
if (buffer != NULL) {
bufline = buffer;
nlines = 0;
while ((bufline = strchr (bufline, newline)) != NULL) {
bufline = bufline + 1;
nlines++;
}
free (buffer);
return (nlines);
}
else {
return (0);
}
}
/* GETFILEBUFF -- return entire file contents in one character string */
char *
getfilebuff (filename)
char *filename; /* Name of file for which to find number of lines */
{
FILE *diskfile;
int lfile, nr;
char *buffer;
/* Open file */
if ((diskfile = fopen (filename, "r")) == NULL)
return (NULL);
/* Find length of file */
if (fseek (diskfile, 0, 2) == 0)
lfile = ftell (diskfile);
else
lfile = 0;
if (lfile < 1) {
fprintf (stderr,"GETFILEBUFF: File %s is empty\n", filename);
fclose (diskfile);
return (NULL);
}
/* Allocate buffer to hold entire file and read it */
if ((buffer = calloc (1, lfile+1)) != NULL) {
fseek (diskfile, 0, 0);
nr = fread (buffer, 1, lfile, diskfile);
if (nr < lfile) {
fprintf (stderr,"GETFILEBUFF: File %s: read %d / %d bytes\n",
filename, nr, lfile);
free (buffer);
fclose (diskfile);
return (NULL);
}
buffer[lfile] = (char) 0;
fclose (diskfile);
return (buffer);
}
else {
fprintf (stderr,"GETFILEBUFF: File %s: no room for %d-byte buffer\n",
filename, lfile);
fclose (diskfile);
return (NULL);
}
}
/* GETFILESIZE -- return size of one file in bytes */
int
getfilesize (filename)
char *filename; /* Name of file for which to find size */
{
FILE *diskfile;
long filesize;
/* Open file */
if ((diskfile = fopen (filename, "r")) == NULL)
return (-1);
/* Move to end of the file */
if (fseek (diskfile, 0, 2) == 0)
/* Position is the size of the file */
filesize = ftell (diskfile);
else
filesize = -1;
fclose (diskfile);
return ((int) filesize);
}
/* ISIMLIST -- Return 1 if list of FITS or IRAF files, else 0 */
int
isimlist (filename)
char *filename; /* Name of file for which to find size */
{
FILE *diskfile;
char token[256];
int ncmax = 254;
if ((diskfile = fopen (filename, "r")) == NULL)
return (0);
else {
first_token (diskfile, ncmax, token);
fclose (diskfile);
if (isfits (token) | isiraf (token))
return (1);
else
return (0);
}
}
static char *token1;
/* FIRST_TOKEN -- Return first token from the next line of an ASCII file */
int
first_token (diskfile, ncmax, token)
FILE *diskfile; /* File descriptor for ASCII file */
int ncmax; /* Maximum number of characters returned */
char *token; /* First token on next line (returned) */
{
char *lastchar, *lspace;
/* If line can be read, add null at the end of the first token */
if (fgets (token, ncmax, diskfile) != NULL) {
lastchar = token + strlen (token) - 1;
/* Remove trailing spaces or control characters */
while (*lastchar <= 32)
*lastchar-- = 0;
if ((lspace = strchr (token, ' ')) != NULL) {
*lspace = (char) 0;
token1 = lspace + 1;
}
else
token1 = NULL;
return (1);
}
else
return (0);
}
char *
next_token ()
{
return (token1);
}
/*
* Jul 14 1999 New subroutines
* Jul 15 1999 Add getfilebuff()
* Oct 15 1999 Fix format eror in error message
* Oct 21 1999 Fix declarations after lint
* Dec 9 1999 Add next_token(); set pointer to next token in first_token
*/
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