#ifndef lint
static const char RCSid[] = "$Id: readobj.c,v 2.8 2003/02/22 02:07:22 greg Exp $";
#endif
/*
* readobj.c - routines for reading in object descriptions.
*
* External symbols declared in object.h
*/
/* ====================================================================
* The Radiance Software License, Version 1.0
*
* Copyright (c) 1990 - 2002 The Regents of the University of California,
* through Lawrence Berkeley National Laboratory. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes Radiance software
* (http://radsite.lbl.gov/)
* developed by the Lawrence Berkeley National Laboratory
* (http://www.lbl.gov/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
* and "The Regents of the University of California" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact radiance@radsite.lbl.gov.
*
* 5. Products derived from this software may not be called "Radiance",
* nor may "Radiance" appear in their name, without prior written
* permission of Lawrence Berkeley National Laboratory.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 Lawrence Berkeley National Laboratory OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of Lawrence Berkeley National Laboratory. For more
* information on Lawrence Berkeley National Laboratory, please see
* .
*/
#include "standard.h"
#include "object.h"
#include "otypes.h"
#include
OBJREC *objblock[MAXOBJBLK]; /* our objects */
OBJECT nobjects = 0; /* # of objects */
void
readobj(inpspec) /* read in an object file or stream */
char *inpspec;
{
OBJECT lastobj;
FILE *infp;
char buf[1024];
register int c;
lastobj = nobjects;
if (inpspec == NULL) {
infp = stdin;
inpspec = "standard input";
} else if (inpspec[0] == '!') {
if ((infp = popen(inpspec+1, "r")) == NULL) {
sprintf(errmsg, "cannot execute \"%s\"", inpspec);
error(SYSTEM, errmsg);
}
} else if ((infp = fopen(inpspec, "r")) == NULL) {
sprintf(errmsg, "cannot open scene file \"%s\"", inpspec);
error(SYSTEM, errmsg);
}
while ((c = getc(infp)) != EOF) {
if (isspace(c))
continue;
if (c == '#') { /* comment */
fgets(buf, sizeof(buf), infp);
} else if (c == '!') { /* command */
ungetc(c, infp);
fgetline(buf, sizeof(buf), infp);
readobj(buf);
} else { /* object */
ungetc(c, infp);
getobject(inpspec, infp);
}
}
if (inpspec[0] == '!')
pclose(infp);
else
fclose(infp);
if (nobjects == lastobj) {
sprintf(errmsg, "(%s): empty file", inpspec);
error(WARNING, errmsg);
}
}
void
getobject(name, fp) /* read the next object */
char *name;
FILE *fp;
{
OBJECT obj;
char sbuf[MAXSTR];
int rval;
register OBJREC *objp;
if ((obj = newobject()) == OVOID)
error(SYSTEM, "out of object space");
objp = objptr(obj);
/* get modifier */
strcpy(sbuf, "EOF");
fgetword(sbuf, MAXSTR, fp);
if (!strcmp(sbuf, VOIDID))
objp->omod = OVOID;
else if ((objp->omod = modifier(sbuf)) == OVOID) {
sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
error(USER, errmsg);
}
/* get type */
strcpy(sbuf, "EOF");
fgetword(sbuf, MAXSTR, fp);
if (!strcmp(sbuf, ALIASID))
objp->otype = -1;
else if ((objp->otype = otype(sbuf)) < 0) {
sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
error(USER, errmsg);
}
/* get identifier */
sbuf[0] = '\0';
fgetword(sbuf, MAXSTR, fp);
objp->oname = savqstr(sbuf);
/* get arguments */
if (objp->otype == -1) {
register OBJECT alias;
strcpy(sbuf, "EOF");
fgetword(sbuf, MAXSTR, fp);
if ((alias = modifier(sbuf)) == OVOID) {
sprintf(errmsg,
"(%s): bad reference \"%s\" for %s \"%s\"",
name, sbuf, ALIASID, objp->oname);
error(USER, errmsg);
}
objp->otype = objptr(alias)->otype;
copystruct(&objp->oargs, &objptr(alias)->oargs);
} else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
sprintf(errmsg, "(%s): bad arguments", name);
objerror(objp, USER, errmsg);
} else if (rval < 0) {
sprintf(errmsg, "(%s): error reading scene", name);
error(SYSTEM, errmsg);
}
/* initialize */
objp->os = NULL;
insertobject(obj); /* add to global structure */
}
int
newobject() /* get a new object */
{
register int i;
if ((nobjects & (OBJBLKSIZ-1)) == 0) { /* new block */
errno = 0;
i = nobjects >> OBJBLKSHFT;
if (i >= MAXOBJBLK)
return(OVOID);
objblock[i] = (OBJREC *)calloc(OBJBLKSIZ, sizeof(OBJREC));
if (objblock[i] == NULL)
return(OVOID);
}
return(nobjects++);
}
void
freeobjects(firstobj, nobjs) /* free a range of objects */
OBJECT firstobj, nobjs;
{
register int obj;
/* check bounds */
if (firstobj < 0)
return;
if (nobjs <= 0)
return;
if (firstobj + nobjs > nobjects)
return;
/* clear objects */
for (obj = firstobj+nobjs; obj-- > firstobj; ) {
register OBJREC *o = objptr(obj);
free_os(o); /* free client memory */
freeqstr(o->oname);
freefargs(&o->oargs);
bzero(o, sizeof(OBJREC));
}
clearobjndx();
/* free objects off end */
for (obj = nobjects; obj-- > 0; )
if (objptr(obj)->oname != NULL)
break;
++obj;
while (nobjects > obj) /* free empty end blocks */
if ((--nobjects & (OBJBLKSIZ-1)) == 0) {
int i = nobjects >> OBJBLKSHFT;
free((void *)objblock[i]);
objblock[i] = NULL;
}
}