/******************************************************************************
 * SAGE - Scalable Adaptive Graphics Environment
 *
 * Copyright (C) 2004 Electronic Visualization Laboratory,
 * University of Illinois at Chicago
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * 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.
 *  * Neither the name of the University of Illinois at Chicago nor
 *    the names of its contributors may be used to endorse or promote
 *    products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT OWNER 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.
 *
 * Direct questions, comments etc about SAGE to http://www.evl.uic.edu/cavern/forum/
 *
 *****************************************************************************/

/*
 *	iflsbuf -
 *
 *				Paul Haeberli - 1984
 *
 */
#include	"image.h"

int iflsbuf( IMAGE *image, IMushort c )
{
	register IMushort *base;
	register int n, rn;
	int size;

	if ((image->flags&_IOWRT)==0)
		return(EOF);
	if ((base=image->base)==NULL) {
		size = IBUFSIZE(image->xsize);
		if ((image->base=base=ibufalloc(image)) == NULL) {
			i_errhdlr("flsbuf: error on buf alloc\n");
			return EOF;
		}
		rn = n = 0;
	} else if ((rn = n = image->ptr - base) > 0)  {
			n = putrow(image,base,image->y,image->z);
			if(++image->y >= image->ysize) {
			    image->y = 0;
			    if(++image->z >= image->zsize) {
				image->z = image->zsize-1;
				image->flags |= _IOEOF;
				return -1;
			    }
			}
 	}
	image->cnt = image->xsize-1;
	*base++ = c;
	image->ptr = base;
	if (rn != n) {
		image->flags |= _IOERR;
		return(EOF);
	}
	return(c);
}