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READOBJ2.C
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C/C++ Source or Header
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1993-10-07
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3KB
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122 lines
/* Copyright (c) 1991 Regents of the University of California */
#ifndef lint
static char SCCSid[] = "@(#)readobj2.c 2.1 11/12/91 LBL";
#endif
/*
* readobj2.c - routines for reading in object descriptions.
*/
#include "standard.h"
#include "object.h"
#include "otypes.h"
#include <ctype.h>
extern char *fgetword();
OBJREC *objblock[MAXOBJBLK]; /* our objects */
OBJECT nobjects = 0; /* # of objects */
int newobject() {return(0);}
readobj(input, callback) /* read in an object file or stream */
char *input;
int (*callback)();
{
FILE *popen();
char *fgets(), *fgetline();
FILE *infp;
char buf[512];
register int c;
if (input == NULL) {
infp = stdin;
input = "standard input";
} else if (input[0] == '!') {
if ((infp = popen(input+1, "r")) == NULL) {
sprintf(errmsg, "cannot execute \"%s\"", input);
error(SYSTEM, errmsg);
}
} else if ((infp = fopen(input, "r")) == NULL) {
sprintf(errmsg, "cannot open scene file \"%s\"", input);
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, callback);
} else { /* object */
ungetc(c, infp);
getobject(input, infp, callback);
}
}
if (input[0] == '!')
pclose(infp);
else
fclose(infp);
}
getobject(name, fp, f) /* read the next object */
char *name;
FILE *fp;
int (*f)();
{
char sbuf[MAXSTR];
OBJREC thisobj;
/* get modifier */
fgetword(sbuf, MAXSTR, fp);
thisobj.omod = OVOID;
/* get type */
fgetword(sbuf, MAXSTR, fp);
if (!strcmp(sbuf, ALIASID))
thisobj.otype = -1;
else if ((thisobj.otype = otype(sbuf)) < 0) {
sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
error(USER, errmsg);
}
/* get identifier */
fgetword(sbuf, MAXSTR, fp);
thisobj.oname = sbuf;
/* get arguments */
if (thisobj.otype == -1) {
fscanf(fp, "%*s");
return;
}
if (readfargs(&thisobj.oargs, fp) <= 0) {
sprintf(errmsg, "(%s): bad arguments", name);
objerror(&thisobj, USER, errmsg);
}
thisobj.os = NULL;
thisobj.lastrno = -1;
/* call function */
(*f)(&thisobj);
/* free memory */
if (thisobj.os != NULL)
switch (thisobj.otype) {
case OBJ_CONE:
case OBJ_CUP:
case OBJ_CYLINDER:
case OBJ_TUBE:
case OBJ_RING:
freecone(&thisobj);
break;
case OBJ_FACE:
freeface(&thisobj);
break;
case OBJ_INSTANCE:
freeinstance(&thisobj);
break;
}
freefargs(&thisobj.oargs);
}