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/*** File libwcs/fileutil.c
*** August 28, 2014
*** By Jessica Mink, jmink@cfa.harvard.edu
*** Harvard-Smithsonian Center for Astrophysics
*** Copyright (C) 1999-2014
*** Smithsonian Astrophysical Observatory, Cambridge, MA, USA
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Correspondence concerning WCSTools should be addressed as follows:
Internet email: jmink@cfa.harvard.edu
Postal address: Jessica Mink
Smithsonian Astrophysical Observatory
60 Garden St.
Cambridge, MA 02138 USA
* 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
* Subroutine: isimlistd (filename, rootdir)
* Return 1 if file is list of FITS or IRAF image files, else 0
* Subroutine: isfilelist (filename, rootdir)
* Return 1 if file is list of readable files, else 0
* Subroutine: isfile (filename)
* Return 1 if file is a readable file, else 0
* Subroutine: first_token (diskfile, ncmax, token)
* Return the first token from the next line of an ASCII file
* Subroutine: next_line (diskfile, ncmax, line)
* Read the next line of an ASCII file and return its length
* Subroutine: stc2s (spchar, string)
* Replace character in string with space
* Subroutine: sts2c (spchar, string)
* Replace spaces in string with character
* Subroutine: istiff (filename)
* Return 1 if file is a readable TIFF graphics file, else 0
* Subroutine: isjpeg (filename)
* Return 1 if file is a readable JPEG graphics file, else 0
* int setoken (tokens, string, cwhite)
* Tokenize a string for easy decoding
* int nextoken (tokens, token, maxchars)
* Get next token from tokenized string
* int getoken (tokens, itok, token, maxchars)
* Get specified token from tokenized string
*/
#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"
#include <sys/types.h>
#include <sys/stat.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, lbuff, ipt, ibuff;
char *buffer, *newbuff, *nextbuff;
/* Treat stdin differently */
if (!strcmp (filename, "stdin")) {
lbuff = 5000;
lfile = lbuff;
buffer = NULL;
ipt = 0;
for (ibuff = 0; ibuff < 10; ibuff++) {
if ((newbuff = realloc (buffer, lfile+1)) != NULL) {
buffer = newbuff;
nextbuff = buffer + ipt;
nr = fread (nextbuff, 1, lbuff, stdin);
if (nr == lbuff)
break;
else {
ipt = ipt + lbuff;
lfile = lfile + lbuff;
}
}
else {
fprintf (stderr,"GETFILEBUFF: No room for %d-byte buffer\n",
lfile);
break;
}
}
return (buffer);
}
/* Open file */
if ((diskfile = fopen (filename, "rb")) == 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 */
{
struct stat statbuff;
if (stat (filename, &statbuff))
return (0);
else
return ((int) statbuff.st_size);
}
int
getfilesize0 (filename)
char *filename; /* Name of file for which to find size */
{
FILE *diskfile;
long filesize;
/* Open file */
if ((diskfile = fopen (filename, "rb")) == 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 possible list file */
{
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);
}
}
/* ISIMLISTD -- Return 1 if list of FITS or IRAF files, else 0 */
int
isimlistd (filename, rootdir)
char *filename; /* Name of possible list file */
char *rootdir; /* Name of root directory for files in list */
{
FILE *diskfile;
char token[256];
char filepath[256];
int ncmax = 254;
if ((diskfile = fopen (filename, "r")) == NULL)
return (0);
else {
first_token (diskfile, ncmax, token);
fclose (diskfile);
if (rootdir != NULL) {
strcpy (filepath, rootdir);
strcat (filepath, "/");
strcat (filepath, token);
}
else
strcpy (filepath, token);
if (isfits (filepath) | isiraf (filepath))
return (1);
else
return (0);
}
}
/* ISFILELIST -- Return 1 if list of readable files, else 0 */
int
isfilelist (filename, rootdir)
char *filename; /* Name of possible list file */
char *rootdir; /* Name of root directory for files in list */
{
FILE *diskfile;
char token[256];
char filepath[256];
int ncmax = 254;
if ((diskfile = fopen (filename, "r")) == NULL)
return (0);
else {
first_token (diskfile, ncmax, token);
fclose (diskfile);
if (rootdir != NULL) {
strcpy (filepath, rootdir);
strcat (filepath, "/");
strcat (filepath, token);
}
else
strcpy (filepath, token);
if (isfile (filepath))
return (1);
else
return (0);
}
}
/* ISFILE -- Return 1 if file is a readable file, else 0 */
int
isfile (filename)
char *filename; /* Name of file to check */
{
struct stat statbuff;
if (!strcasecmp (filename, "stdin"))
return (1);
else if (access (filename, R_OK))
return (0);
else if (stat (filename, &statbuff))
return (0);
else {
if (S_ISDIR(statbuff.st_mode) && S_IFDIR)
return (2);
else
return (1);
}
}
/* NEXT_LINE -- Read the next line of an ASCII file, returning length */
/* Lines beginning with # are ignored*/
int
next_line (diskfile, ncmax, line)
FILE *diskfile; /* File descriptor for ASCII file */
int ncmax; /* Maximum number of characters returned */
char *line; /* Next line (returned) */
{
char *lastchar;
/* If line can be read, add null at the end of the first token */
if (fgets (line, ncmax, diskfile) != NULL) {
while (line[0] == '#') {
(void) fgets (line, ncmax, diskfile);
}
/* If only character is a control character, return a NULL string */
if ((strlen(line)==1) && (line[0]<32)){
line[0] = (char)0;
return (1);
}
lastchar = line + strlen (line) - 1;
/* Remove trailing spaces or control characters */
while (*lastchar <= 32)
*lastchar-- = 0;
return (strlen (line));
}
else
return (0);
}
/* FIRST_TOKEN -- Return first token from the next line of an ASCII file */
/* Lines beginning with # are ignored */
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) {
while (token[0] == '#') {
(void) fgets (token, ncmax, diskfile);
}
/* If only character is a control character, return a NULL */
if ((strlen(token)==1) && (token[0]<32)){
token[0]=0;
return (1);
}
lastchar = token + strlen (token) - 1;
/* Remove trailing spaces or control characters */
while (*lastchar <= 32)
*lastchar-- = 0;
if ((lspace = strchr (token, ' ')) != NULL) {
*lspace = (char) 0;
}
return (1);
}
else
return (0);
}
/* Replace character in string with space */
int
stc2s (spchar, string)
char *spchar; /* Character to replace with spaces */
char *string;
{
int i, lstr, n;
lstr = strlen (string);
n = 0;
for (i = 0; i < lstr; i++) {
if (string[i] == spchar[0]) {
n++;
string[i] = ' ';
}
}
return (n);
}
/* Replace spaces in string with character */
int
sts2c (spchar, string)
char *spchar; /* Character with which to replace spaces */
char *string;
{
int i, lstr, n;
lstr = strlen (string);
n = 0;
for (i = 0; i < lstr; i++) {
if (string[i] == ' ') {
n++;
string[i] = spchar[0];
}
}
return (n);
}
/* ISTIFF -- Return 1 if TIFF file, else 0 */
int
istiff (filename)
char *filename; /* Name of file to check */
{
int diskfile;
char keyword[16];
int nbr;
/* First check to see if this is an assignment */
if (strchr (filename, '='))
return (0);
/* Check file extension */
if (strsrch (filename, ".tif") ||
strsrch (filename, ".tiff") ||
strsrch (filename, ".TIFF") ||
strsrch (filename, ".TIF"))
return (1);
/* If no TIFF file suffix, try opening the file */
else {
if ((diskfile = open (filename, O_RDONLY)) < 0)
return (0);
else {
nbr = read (diskfile, keyword, 4);
close (diskfile);
if (nbr < 4)
return (0);
else if (!strncmp (keyword, "II", 2))
return (1);
else if (!strncmp (keyword, "MM", 2))
return (1);
else
return (0);
}
}
}
/* ISJPEG -- Return 1 if JPEG file, else 0 */
int
isjpeg (filename)
char *filename; /* Name of file to check */
{
int diskfile;
char keyword[16];
int nbr;
/* First check to see if this is an assignment */
if (strchr (filename, '='))
return (0);
/* Check file extension */
if (strsrch (filename, ".jpg") ||
strsrch (filename, ".jpeg") ||
strsrch (filename, ".JPEG") ||
strsrch (filename, ".jfif") ||
strsrch (filename, ".jfi") ||
strsrch (filename, ".JFIF") ||
strsrch (filename, ".JFI") ||
strsrch (filename, ".JPG"))
return (1);
/* If no JPEG file suffix, try opening the file */
else {
if ((diskfile = open (filename, O_RDONLY)) < 0)
return (0);
else {
nbr = read (diskfile, keyword, 2);
close (diskfile);
if (nbr < 4)
return (0);
else if (keyword[0] == (char) 0xFF &&
keyword[1] == (char) 0xD8)
return (1);
else
return (0);
}
}
}
/* ISGIF -- Return 1 if GIF file, else 0 */
int
isgif (filename)
char *filename; /* Name of file to check */
{
int diskfile;
char keyword[16];
int nbr;
/* First check to see if this is an assignment */
if (strchr (filename, '='))
return (0);
/* Check file extension */
if (strsrch (filename, ".gif") ||
strsrch (filename, ".GIF"))
return (1);
/* If no GIF file suffix, try opening the file */
else {
if ((diskfile = open (filename, O_RDONLY)) < 0)
return (0);
else {
nbr = read (diskfile, keyword, 6);
close (diskfile);
if (nbr < 4)
return (0);
else if (!strncmp (keyword, "GIF", 3))
return (1);
else
return (0);
}
}
}
static int maxtokens = MAXTOKENS; /* Set maximum number of tokens from wcscat.h*/
/* -- SETOKEN -- tokenize a string for easy decoding */
int
setoken (tokens, string, cwhite)
struct Tokens *tokens; /* Token structure returned */
char *string; /* character string to tokenize */
char *cwhite; /* additional whitespace characters
* if = tab, disallow spaces and commas */
{
char squote, dquote, jch, newline;
char *iq, *stri, *wtype, *str0, *inew;
int i,j,naddw, ltok;
newline = (char) 10;
squote = (char) 39;
dquote = (char) 34;
if (string == NULL)
return (0);
/* Line is terminated by newline or NULL */
inew = strchr (string, newline);
if (inew != NULL)
tokens->lline = inew - string - 1;
else
tokens->lline = strlen (string);
/* Save current line in structure */
tokens->line = string;
/* Add extra whitespace characters */
if (cwhite == NULL)
naddw = 0;
else
naddw = strlen (cwhite);
/* if character is tab, allow only tabs and nulls as separators */
if (naddw > 0 && !strncmp (cwhite, "tab", 3)) {
tokens->white[0] = (char) 9; /* Tab */
tokens->white[1] = (char) 0; /* NULL (end of string) */
tokens->nwhite = 2;
}
/* if character is bar, allow only bars and nulls as separators */
else if (naddw > 0 && !strncmp (cwhite, "bar", 3)) {
tokens->white[0] = '|'; /* Bar */
tokens->white[1] = (char) 0; /* NULL (end of string) */
tokens->nwhite = 2;
}
/* otherwise, allow spaces, tabs, commas, nulls, and cwhite */
else {
tokens->nwhite = 4 + naddw;;
tokens->white[0] = ' '; /* Space */
tokens->white[1] = (char) 9; /* Tab */
tokens->white[2] = ','; /* Comma */
tokens->white[3] = (char) 124; /* Vertical bar */
tokens->white[4] = (char) 0; /* Null (end of string) */
if (tokens->nwhite > 20)
tokens->nwhite = 20;
if (naddw > 0) {
i = 0;
for (j = 4; j < tokens->nwhite; j++) {
tokens->white[j] = cwhite[i];
i++;
}
}
}
tokens->white[tokens->nwhite] = (char) 0;
tokens->ntok = 0;
tokens->itok = 0;
iq = string - 1;
for (i = 0; i < maxtokens; i++) {
tokens->tok1[i] = NULL;
tokens->ltok[i] = 0;
}
/* Process string one character at a time */
stri = string;
str0 = string;
while (stri < string+tokens->lline) {
/* Keep stuff between quotes in one token */
if (stri <= iq)
continue;
jch = *stri;
/* Handle quoted strings */
if (jch == squote)
iq = strchr (stri+1, squote);
else if (jch == dquote)
iq = strchr (stri+1, dquote);
else
iq = stri;
if (iq > stri) {
tokens->ntok = tokens->ntok + 1;
if (tokens->ntok > maxtokens) return (maxtokens);
tokens->tok1[tokens->ntok] = stri + 1;
tokens->ltok[tokens->ntok] = (iq - stri) - 1;
stri = iq + 1;
str0 = iq + 1;
continue;
}
/* Search for unquoted tokens */
wtype = strchr (tokens->white, jch);
/* If this is one of the additional whitespace characters,
* pass as a separate token */
if (wtype > tokens->white + 3) {
/* Terminate token before whitespace */
if (stri > str0) {
tokens->ntok = tokens->ntok + 1;
if (tokens->ntok > maxtokens) return (maxtokens);
tokens->tok1[tokens->ntok] = str0;
tokens->ltok[tokens->ntok] = stri - str0;
}
/* Make whitespace character next token; start new one */
tokens->ntok = tokens->ntok + 1;
if (tokens->ntok > maxtokens) return (maxtokens);
tokens->tok1[tokens->ntok] = stri;
tokens->ltok[tokens->ntok] = 1;
stri++;
str0 = stri;
}
/* Pass previous token if regular whitespace or NULL */
else if (wtype != NULL || jch == (char) 0) {
/* Ignore leading whitespace */
if (stri == str0) {
stri++;
str0 = stri;
}
/* terminate token before whitespace; start new one */
else {
tokens->ntok = tokens->ntok + 1;
if (tokens->ntok > maxtokens) return (maxtokens);
tokens->tok1[tokens->ntok] = str0;
tokens->ltok[tokens->ntok] = stri - str0;
stri++;
str0 = stri;
}
}
/* Keep going if not whitespace */
else
stri++;
}
/* Add token terminated by end of line */
if (str0 < stri) {
tokens->ntok = tokens->ntok + 1;
if (tokens->ntok > maxtokens)
return (maxtokens);
tokens->tok1[tokens->ntok] = str0;
ltok = stri - str0 + 1;
tokens->ltok[tokens->ntok] = ltok;
/* Deal with white space just before end of line */
jch = str0[ltok-1];
if (strchr (tokens->white, jch)) {
ltok = ltok - 1;
tokens->ltok[tokens->ntok] = ltok;
tokens->ntok = tokens->ntok + 1;
tokens->tok1[tokens->ntok] = str0 + ltok;
tokens->ltok[tokens->ntok] = 0;
}
}
tokens->itok = 0;
return (tokens->ntok);
}
/* NEXTOKEN -- get next token from tokenized string */
int
nextoken (tokens, token, maxchars)
struct Tokens *tokens; /* Token structure returned */
char *token; /* token (returned) */
int maxchars; /* Maximum length of token */
{
int ltok; /* length of token string (returned) */
int it, i;
int maxc = maxchars - 1;
tokens->itok = tokens->itok + 1;
it = tokens->itok;
if (it > tokens->ntok)
it = tokens->ntok;
else if (it < 1)
it = 1;
ltok = tokens->ltok[it];
if (ltok > maxc)
ltok = maxc;
strncpy (token, tokens->tok1[it], ltok);
for (i = ltok; i < maxc; i++)
token[i] = (char) 0;
return (ltok);
}
/* GETOKEN -- get specified token from tokenized string */
int
getoken (tokens, itok, token, maxchars)
struct Tokens *tokens; /* Token structure returned */
int itok; /* token sequence number of token
* if <0, get whole string after token -itok
* if =0, get whole string */
char *token; /* token (returned) */
int maxchars; /* Maximum length of token */
{
int ltok; /* length of token string (returned) */
int it, i;
int maxc = maxchars - 1;
it = itok;
if (it > 0 ) {
if (it > tokens->ntok)
it = tokens->ntok;
ltok = tokens->ltok[it];
if (ltok > maxc)
ltok = maxc;
strncpy (token, tokens->tok1[it], ltok);
}
else if (it < 0) {
if (it < -tokens->ntok)
it = -tokens->ntok;
ltok = tokens->line + tokens->lline - tokens->tok1[-it];
if (ltok > maxc)
ltok = maxc;
strncpy (token, tokens->tok1[-it], ltok);
}
else {
ltok = tokens->lline;
if (ltok > maxc)
ltok = maxc;
strncpy (token, tokens->tok1[1], ltok);
}
for (i = ltok; i < maxc; i++)
token[i] = (char) 0;
return (ltok);
}
/*
* 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
*
* Sep 25 2001 Add isfilelist(); move isfile() from catutil.c
*
* Jan 4 2002 Allow getfilebuffer() to read from stdin
* Jan 8 2002 Add sts2c() and stc2s() for space-replaced strings
* Mar 22 2002 Clean up isfilelist()
* Aug 1 2002 Return 1 if file is stdin in isfile()
*
* Feb 4 2003 Open catalog file rb instead of r (Martin Ploner, Bern)
* Mar 5 2003 Add isimlistd() to check image lists with root directory
* May 27 2003 Use file stat call in getfilesize() instead of opening file
* Jul 17 2003 Add root directory argument to isfilelist()
*
* Sep 29 2004 Drop next_token() to avoid conflict with subroutine in catutil.c
*
* Sep 26 2005 In first_token, return NULL if token is only control character
*
* Feb 23 2006 Add istiff(), isjpeg(), isgif() to check TIFF, JPEG, GIF files
* Jun 20 2006 Cast call to fgets() void
*
* Jan 5 2007 Change stc2s() and sts2c() to pass single character as pointer
* Jan 11 2007 Move token access subroutines from catutil.c
*
* Aug 28 2014 Return length from next_line(): 0=unsuccessful
*/
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