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/* Copyright (c) 1986 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* readobj.c - routines for reading in object descriptions.
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*
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* 7/28/85
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*/
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#include "standard.h"
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#include "object.h"
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#include "otypes.h"
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#include <ctype.h>
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extern char *fgetword(), *strcpy();
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OBJREC *objblock[MAXOBJBLK]; /* our objects */
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OBJECT nobjects = 0; /* # of objects */
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readobj(input) /* read in an object file or stream */
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char *input;
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{
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FILE *popen();
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char *fgets(), *fgetline();
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FILE *infp;
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char buf[512];
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register int c;
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if (input == NULL) {
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infp = stdin;
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input = "standard input";
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} else if (input[0] == '!') {
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if ((infp = popen(input+1, "r")) == NULL) {
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sprintf(errmsg, "cannot execute \"%s\"", input);
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error(SYSTEM, errmsg);
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}
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} else if ((infp = fopen(input, "r")) == NULL) {
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sprintf(errmsg, "cannot open scene file \"%s\"", input);
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error(SYSTEM, errmsg);
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}
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while ((c = getc(infp)) != EOF) {
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if (isspace(c))
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continue;
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if (c == '#') { /* comment */
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fgets(buf, sizeof(buf), infp);
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} else if (c == '!') { /* command */
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ungetc(c, infp);
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fgetline(buf, sizeof(buf), infp);
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readobj(buf);
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} else { /* object */
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ungetc(c, infp);
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getobject(input, infp);
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}
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}
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if (input[0] == '!')
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pclose(infp);
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else
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fclose(infp);
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}
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getobject(name, fp) /* read the next object */
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char *name;
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FILE *fp;
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{
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OBJECT obj;
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char sbuf[MAXSTR];
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int rval;
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register OBJREC *objp;
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if ((obj = newobject()) == OVOID)
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error(SYSTEM, "out of object space");
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objp = objptr(obj);
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/* get modifier */
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strcpy(sbuf, "EOF");
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fgetword(sbuf, MAXSTR, fp);
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if (!strcmp(sbuf, VOIDID))
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objp->omod = OVOID;
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else if ((objp->omod = modifier(sbuf)) == OVOID) {
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sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
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error(USER, errmsg);
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}
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/* get type */
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strcpy(sbuf, "EOF");
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fgetword(sbuf, MAXSTR, fp);
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if (!strcmp(sbuf, ALIASID))
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objp->otype = -1;
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else if ((objp->otype = otype(sbuf)) < 0) {
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sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
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error(USER, errmsg);
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}
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/* get identifier */
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sbuf[0] = '\0';
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fgetword(sbuf, MAXSTR, fp);
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objp->oname = savqstr(sbuf);
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/* get arguments */
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if (objp->otype == -1) {
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register OBJECT alias;
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strcpy(sbuf, "EOF");
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fgetword(sbuf, MAXSTR, fp);
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if ((alias = modifier(sbuf)) == OVOID) {
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sprintf(errmsg,
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"(%s): bad reference \"%s\" for %s \"%s\"",
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name, sbuf, ALIASID, objp->oname);
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error(USER, errmsg);
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}
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objp->otype = objptr(alias)->otype;
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copystruct(&objp->oargs, &objptr(alias)->oargs);
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} else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
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sprintf(errmsg, "(%s): bad arguments", name);
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objerror(objp, USER, errmsg);
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} else if (rval < 0) {
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sprintf(errmsg, "(%s): error reading scene", name);
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error(SYSTEM, errmsg);
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}
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/* initialize */
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objp->os = NULL;
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insertobject(obj); /* add to global structure */
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}
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int
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newobject() /* get a new object */
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{
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register int i;
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if ((nobjects & 077) == 0) { /* new block */
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errno = 0;
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i = nobjects >> 6;
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if (i >= MAXOBJBLK)
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return(OVOID);
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objblock[i] = (OBJREC *)bmalloc(0100*sizeof(OBJREC));
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if (objblock[i] == NULL)
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return(OVOID);
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}
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return(nobjects++);
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}
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