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greg |
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/* Copyright (c) 1991 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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* readobj2.c - routines for reading in object descriptions.
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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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OBJREC *objblock[MAXOBJBLK]; /* our objects */
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OBJECT nobjects = 0; /* # of objects */
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int newobject() {return(0);}
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readobj(input, callback) /* read in an object file or stream */
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char *input;
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int (*callback)();
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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, callback);
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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, f) /* read the next object */
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char *name;
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FILE *fp;
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int (*f)();
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{
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char sbuf[MAXSTR];
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OBJREC thisobj;
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/* get modifier */
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fscanf(fp, "%s", sbuf);
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thisobj.omod = modifier(sbuf);
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/* get type */
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fscanf(fp, "%s", sbuf);
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if (!strcmp(sbuf, ALIASID))
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thisobj.otype = -1;
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else if ((thisobj.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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fscanf(fp, "%s", sbuf);
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thisobj.oname = sbuf;
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/* get arguments */
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if (thisobj.otype == -1) {
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fscanf(fp, "%*s");
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return;
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}
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if (readfargs(&thisobj.oargs, fp) < 0) {
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sprintf(errmsg, "(%s): bad arguments", name);
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objerror(&thisobj, USER, errmsg);
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}
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thisobj.os = NULL;
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thisobj.lastrno = -1;
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/* call function */
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(*f)(&thisobj);
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/* free memory */
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if (thisobj.os != NULL)
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switch (thisobj.otype) {
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case OBJ_CONE:
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case OBJ_CUP:
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case OBJ_CYLINDER:
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case OBJ_TUBE:
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case OBJ_RING:
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freecone(&thisobj);
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break;
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case OBJ_FACE:
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freeface(&thisobj);
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break;
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case OBJ_INSTANCE:
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freeinstance(&thisobj);
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break;
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}
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freefargs(&thisobj.oargs);
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}
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readfargs(fa, fp) /* read function arguments from stream */
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register FUNARGS *fa;
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FILE *fp;
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{
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char sbuf[MAXSTR];
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int n;
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register int i;
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if (fscanf(fp, "%d", &n) != 1 || n < 0)
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return(-1);
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if (fa->nsargs = n) {
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fa->sarg = (char **)malloc(n*sizeof(char *));
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if (fa->sarg == NULL)
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goto memerr;
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for (i = 0; i < fa->nsargs; i++) {
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if (fscanf(fp, "%s", sbuf) != 1)
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return(-1);
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fa->sarg[i] = savestr(sbuf);
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}
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} else
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fa->sarg = NULL;
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if (fscanf(fp, "%d", &n) != 1 || n < 0)
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return(-1);
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#ifdef IARGS
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if (fa->niargs = n) {
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fa->iarg = (long *)malloc(n*sizeof(long));
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if (fa->iarg == NULL)
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goto memerr;
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for (i = 0; i < n; i++)
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if (fscanf(fp, "%ld", &fa->iarg[i]) != 1)
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return(-1);
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} else
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fa->iarg = NULL;
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#else
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if (n != 0)
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return(-1);
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#endif
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if (fscanf(fp, "%d", &n) != 1 || n < 0)
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return(-1);
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if (fa->nfargs = n) {
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fa->farg = (double *)malloc(n*sizeof(double));
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if (fa->farg == NULL)
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goto memerr;
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for (i = 0; i < n; i++)
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if (fscanf(fp, "%lf", &fa->farg[i]) != 1)
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return(-1);
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} else
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fa->farg = NULL;
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return(0);
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memerr:
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error(SYSTEM, "out of memory in readfargs");
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}
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freefargs(fa) /* free arguments */
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register FUNARGS *fa;
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{
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register int i;
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if (fa->nsargs) {
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for (i = 0; i < fa->nsargs; i++)
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free(fa->sarg[i]);
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free((char *)fa->sarg);
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}
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#ifdef IARGS
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if (fa->niargs)
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free((char *)fa->iarg);
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#endif
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if (fa->nfargs)
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free((char *)fa->farg);
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}
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