#ifndef lint
static char Rcs_Id[] =
"$Id: xgets.c,v 1.28 2005/04/14 14:38:23 geoff Exp $";
#endif
/*
* Copyright 1987, 1988, 1989, 1992, 1993, 1999, 2001, Geoff Kuenning,
* Claremont, CA.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All modifications to the source code must be clearly marked as
* such. Binary redistributions based on modified source code
* must be clearly marked as modified versions in the documentation
* and/or other materials provided with the distribution.
* 4. The code that causes the 'ispell -v' command to display a prominent
* link to the official ispell Web site may not be removed.
* 5. The name of Geoff Kuenning may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY GEOFF KUENNING AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL GEOFF KUENNING OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* $Log: xgets.c,v $
* Revision 1.28 2005/04/14 14:38:23 geoff
* Update license.
*
* Revision 1.27 2002/02/06 05:58:03 geoff
* Janos Mandli: trim trailing whitespace from include-file names
*
* Revision 1.26 2001/07/25 21:51:46 geoff
* Minor license update.
*
* Revision 1.25 2001/07/23 20:24:04 geoff
* Update the copyright and the license.
*
* Revision 1.24 1999/01/18 03:28:47 geoff
* Get of a warning message caused by poor style.
*
* Revision 1.23 1999/01/07 01:23:01 geoff
* Update the copyright.
*
* Revision 1.22 1994/09/16 04:48:34 geoff
* Be sure to deliver newlines to the caller, so that it can tell whether
* or not a complete line was read.
*
* Revision 1.21 1994/01/25 07:12:22 geoff
* Get rid of all old RCS log lines in preparation for the 3.1 release.
*
*/
#include "config.h"
#include "ispell.h"
#include "proto.h"
#include <ctype.h>
char * xgets P ((char * string, int size, FILE * stream));
#ifndef MAXINCLUDEFILES
#define MAXINCLUDEFILES 1 /* maximum number of new files in stack */
#endif
/*
* xgets () acts just like gets () except that if a line matches
* "&Include_File&<something>" xgets () will start reading from the
* file <something>.
*
* Andrew Vignaux -- andrew@vuwcomp Fri May 8 16:40:23 NZST 1987
* modified
* Mark Davies -- mark@vuwcomp Mon May 11 22:38:10 NZST 1987
*/
char * xgets (str, size, stream)
char str[];
int size;
FILE * stream;
{
#if MAXINCLUDEFILES == 0
return fgets (str, size, stream);
#else
static char * Include_File = DEFINCSTR;
static int Include_Len = 0;
static FILE * F[MAXINCLUDEFILES+1];
static FILE ** current_F = F;
char * s = str;
int c;
/* read the environment variable if we havent already */
if (Include_Len == 0)
{
char * env_variable;
if ((env_variable = getenv (INCSTRVAR)) != NULL)
Include_File = env_variable;
Include_Len = strlen (Include_File);
/* initialise the file stack */
*current_F = stream;
}
for ( ; ; )
{
c = '\0';
if ((s - str) + 1 < size
&& (c = getc (*current_F)) != EOF)
{
*s++ = (char) c;
if (c != '\n')
continue;
}
*s = '\0'; /* end of line */
if (c == EOF)
{
if (current_F == F) /* if end of standard input */
{
if (s == str)
return (NULL);
}
else
{
(void) fclose (*(current_F--));
if (s == str) continue;
}
}
if (incfileflag != 0
&& strncmp (str, Include_File, (unsigned int) Include_Len) == 0)
{
char * file_name = str + Include_Len;
if (*file_name != '\0')
{
char* p = file_name + strlen (file_name) - 1;
while (p >= file_name && isspace (*p))
{
*p = '\0';
--p;
}
}
if (current_F - F < MAXINCLUDEFILES && *file_name != '\0')
{
FILE * f;
if ((f = fopen (file_name, "r")) != NULL)
*(++current_F) = f;
}
s = str;
continue;
}
break;
}
return (str);
#endif
}