src/common/readobj.c

/* Copyright (c) 1986 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  readobj.c - routines for reading in object descriptions.
 *
 *     7/28/85
 */

#include  "standard.h"

#include  "object.h"

#include  "otypes.h"

#include  <ctype.h>

extern char  *fgetword(), *strcpy();

OBJREC  *objblock[MAXOBJBLK];           /* our objects */
OBJECT  nobjects = 0;                   /* # of objects */


readobj(input)                  /* read in an object file or stream */
char  *input;
{
        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);
                } else {                                /* object */
                        ungetc(c, infp);
                        getobject(input, infp);
                }
        }
        if (input[0] == '!')
                pclose(infp);
        else
                fclose(infp);
}


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;
        objp->lastrno = -1;

        insertobject(obj);              /* add to global structure */
}


int
newobject()                             /* get a new object */
{
        register int  i;

        if ((nobjects & 077) == 0) {            /* new block */
                errno = 0;
                i = nobjects >> 6;
                if (i >= MAXOBJBLK)
                        return(OVOID);
                objblock[i] = (OBJREC *)bmalloc(0100*sizeof(OBJREC));
                if (objblock[i] == NULL)
                        return(OVOID);
        }
        return(nobjects++);
}
Revision:	1.7
Committed:	Mon Jul 22 11:48:04 1991 UTC (32 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+10 -4 lines
Log Message:	eliminated calls to scanf()
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1986 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* readobj.c - routines for reading in object descriptions.
9			*
10			* 7/28/85
11			*/
12
13			#include "standard.h"
14
15			#include "object.h"
16
17			#include "otypes.h"
18
19			#include <ctype.h>
20
21	greg	1.7	extern char fgetword(), strcpy();
22
23	greg	1.1	OBJREC objblock[MAXOBJBLK]; / our objects */
24	greg	1.4	OBJECT nobjects = 0; /* # of objects */
25	greg	1.1
26
27			readobj(input) /* read in an object file or stream */
28			char *input;
29			{
30			FILE *popen();
31	greg	1.2	char fgets(), fgetline();
32	greg	1.1	FILE *infp;
33			char buf[512];
34			register int c;
35
36			if (input == NULL) {
37			infp = stdin;
38			input = "standard input";
39			} else if (input[0] == '!') {
40			if ((infp = popen(input+1, "r")) == NULL) {
41			sprintf(errmsg, "cannot execute \"%s\"", input);
42			error(SYSTEM, errmsg);
43			}
44			} else if ((infp = fopen(input, "r")) == NULL) {
45			sprintf(errmsg, "cannot open scene file \"%s\"", input);
46			error(SYSTEM, errmsg);
47			}
48			while ((c = getc(infp)) != EOF) {
49			if (isspace(c))
50			continue;
51			if (c == '#') { /* comment */
52			fgets(buf, sizeof(buf), infp);
53	greg	1.2	} else if (c == '!') { /* command */
54	greg	1.1	ungetc(c, infp);
55	greg	1.2	fgetline(buf, sizeof(buf), infp);
56	greg	1.1	readobj(buf);
57			} else { /* object */
58			ungetc(c, infp);
59			getobject(input, infp);
60			}
61			}
62			if (input[0] == '!')
63			pclose(infp);
64			else
65			fclose(infp);
66			}
67
68
69			getobject(name, fp) /* read the next object */
70			char *name;
71			FILE *fp;
72			{
73			OBJECT obj;
74			char sbuf[MAXSTR];
75	greg	1.6	int rval;
76	greg	1.1	register OBJREC *objp;
77
78			if ((obj = newobject()) == OVOID)
79			error(SYSTEM, "out of object space");
80			objp = objptr(obj);
81			/* get modifier */
82	greg	1.7	strcpy(sbuf, "EOF");
83			fgetword(sbuf, MAXSTR, fp);
84	greg	1.1	if (!strcmp(sbuf, VOIDID))
85			objp->omod = OVOID;
86			else if ((objp->omod = modifier(sbuf)) == OVOID) {
87			sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
88			error(USER, errmsg);
89			}
90			/* get type */
91	greg	1.7	strcpy(sbuf, "EOF");
92			fgetword(sbuf, MAXSTR, fp);
93	greg	1.1	if (!strcmp(sbuf, ALIASID))
94			objp->otype = -1;
95			else if ((objp->otype = otype(sbuf)) < 0) {
96			sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
97			error(USER, errmsg);
98			}
99			/* get identifier */
100	greg	1.7	sbuf[0] = '\0';
101			fgetword(sbuf, MAXSTR, fp);
102	greg	1.1	objp->oname = savqstr(sbuf);
103			/* get arguments */
104			if (objp->otype == -1) {
105			register OBJECT alias;
106	greg	1.7	strcpy(sbuf, "EOF");
107			fgetword(sbuf, MAXSTR, fp);
108	greg	1.1	if ((alias = modifier(sbuf)) == OVOID) {
109			sprintf(errmsg,
110			"(%s): bad reference \"%s\" for %s \"%s\"",
111			name, sbuf, ALIASID, objp->oname);
112			error(USER, errmsg);
113			}
114			objp->otype = objptr(alias)->otype;
115	greg	1.3	copystruct(&objp->oargs, &objptr(alias)->oargs);
116	greg	1.6	} else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
117	greg	1.1	sprintf(errmsg, "(%s): bad arguments", name);
118			objerror(objp, USER, errmsg);
119	greg	1.6	} else if (rval < 0) {
120			sprintf(errmsg, "(%s): error reading scene", name);
121			error(SYSTEM, errmsg);
122	greg	1.1	}
123			/* initialize */
124			objp->os = NULL;
125			objp->lastrno = -1;
126
127			insertobject(obj); /* add to global structure */
128			}
129
130
131			int
132			newobject() /* get a new object */
133			{
134			register int i;
135
136			if ((nobjects & 077) == 0) { /* new block */
137			errno = 0;
138			i = nobjects >> 6;
139			if (i >= MAXOBJBLK)
140			return(OVOID);
141	greg	1.5	objblock[i] = (OBJREC )bmalloc(0100sizeof(OBJREC));
142	greg	1.1	if (objblock[i] == NULL)
143			return(OVOID);
144			}
145			return(nobjects++);
146			}