src/common/readoct.c

/* Copyright (c) 1991 Regents of the University of California */

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

/*
 *  readoct.c - routines to read octree information.
 *
 *     7/30/85
 */

#include  "standard.h"

#include  "octree.h"

#include  "object.h"

#include  "otypes.h"

static double  ogetflt();
static long  ogetint();
static char  *ogetstr();
static int  getobj(), octerror();
static OCTREE  getfullnode(), gettree();

static char  *infn;                     /* input file name */
static FILE  *infp;                     /* input file stream */
static int  objsize;                    /* size of stored OBJECT's */
static OBJECT  objorig;                 /* zeroeth object */
static short  otypmap[NUMOTYPE+8];      /* object type map */


int
readoct(fname, load, scene, ofn)        /* read in octree from file */
char  *fname;
int  load;
CUBE  *scene;
char  *ofn[];
{
        extern int  fputs();
        char  sbuf[512];
        int  nf;
        OBJECT  fnobjects;
        register int  i;
        long  m;
        
        if (fname == NULL) {
                infn = "standard input";
                infp = stdin;
        } else {
                infn = fname;
                if ((infp = fopen(fname, "r")) == NULL) {
                        sprintf(errmsg, "cannot open octree file \"%s\"",
                                        fname);
                        error(SYSTEM, errmsg);
                }
        }
                                        /* get header */
        if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : NULL) < 0)
                octerror(USER, "not an octree");
                                        /* check format */
        if ((objsize = ogetint(2)-OCTMAGIC) <= 0 ||
                        objsize > MAXOBJSIZ || objsize > sizeof(long))
                octerror(USER, "incompatible octree format");
                                        /* get boundaries */
        if (load & IO_BOUNDS) {
                for (i = 0; i < 3; i++)
                        scene->cuorg[i] = atof(ogetstr(sbuf));
                scene->cusize = atof(ogetstr(sbuf));
        } else {
                for (i = 0; i < 4; i++)
                        ogetstr(sbuf);
        }
        objorig = nobjects;             /* set object offset */
        nf = 0;                         /* get object files */
        while (*ogetstr(sbuf)) {
                if (load & IO_SCENE)
                        readobj(sbuf);
                if (load & IO_FILES)
                        ofn[nf] = savqstr(sbuf);
                nf++;
        }
        if (load & IO_FILES)
                ofn[nf] = NULL;
                                        /* get number of objects */
        fnobjects = m = ogetint(objsize);
        if (fnobjects != m)
                octerror(USER, "too many objects");

        if (load & IO_TREE) {
                                                /* get the octree */
                scene->cutree = gettree();
                if (load & IO_SCENE)            /* get the scene */
                    if (nf == 0) {
                        for (i = 0; *ogetstr(sbuf); i++)
                                if ((otypmap[i] = otype(sbuf)) < 0) {
                                        sprintf(errmsg, "unknown type \"%s\"",
                                                        sbuf);
                                        octerror(WARNING, errmsg);
                                }
                        while (getobj() != OVOID)
                                ;
                    } else {                    /* consistency checks */
                                        /* check object count */
                        if (nobjects != objorig+fnobjects)
                                octerror(USER, "bad object count; octree stale?");
                                        /* check for non-surfaces */
                        if (nonsurfinset(objorig, fnobjects))
                                octerror(USER, "modifier in tree; octree stale?");
                    }
        }
        fclose(infp);
        return(nf);
}


static char *
ogetstr(s)                      /* get null-terminated string */
char  *s;
{
        extern char  *getstr();

        if (getstr(s, infp) == NULL)
                octerror(USER, "truncated octree");
        return(s);
}


static OCTREE
getfullnode()                   /* get a set, return fullnode */
{
        OBJECT  set[MAXSET+1];
        register int  i;
        register long  m;

        if ((set[0] = ogetint(objsize)) > MAXSET)
                octerror(USER, "bad set in getfullnode");
        for (i = 1; i <= set[0]; i++) {
                m = ogetint(objsize) + objorig;
                if ((set[i] = m) != m)
                        octerror(USER, "too many objects");
        }
        return(fullnode(set));
}       


static long
ogetint(siz)                    /* get a siz-byte integer */
int  siz;
{
        extern long  getint();
        register long  r;

        r = getint(siz, infp);
        if (feof(infp))
                octerror(USER, "truncated octree");
        return(r);
}


static double
ogetflt()                       /* get a floating point number */
{
        extern double  getflt();
        double  r;

        r = getflt(infp);
        if (feof(infp))
                octerror(USER, "truncated octree");
        return(r);
}
        

static OCTREE
gettree()                       /* get a pre-ordered octree */
{
        register OCTREE  ot;
        register int  i;
        
        switch (getc(infp)) {
        case OT_EMPTY:
                return(EMPTY);
        case OT_FULL:
                return(getfullnode());
        case OT_TREE:
                if ((ot = octalloc()) == EMPTY)
                        octerror(SYSTEM, "out of tree space in gettree");
                for (i = 0; i < 8; i++)
                        octkid(ot, i) = gettree();
                return(ot);
        case EOF:
                octerror(USER, "truncated octree");
        default:
                octerror(USER, "damaged octree");
        }
}


static
getobj()                                /* get next object */
{
        char  sbuf[MAXSTR];
        int  obj;
        register int  i;
        register long  m;
        register OBJREC  *objp;

        i = ogetint(1);
        if (i == -1)
                return(OVOID);          /* terminator */
        if ((obj = newobject()) == OVOID)
                error(SYSTEM, "out of object space");
        objp = objptr(obj);
        if ((objp->otype = otypmap[i]) < 0)
                octerror(USER, "reference to unknown type");
        if ((m = ogetint(objsize)) != OVOID) {
                m += objorig;
                if ((OBJECT)m != m)
                        octerror(USER, "too many objects");
        }
        objp->omod = m;
        objp->oname = savqstr(ogetstr(sbuf));
        if (objp->oargs.nsargs = ogetint(2)) {
                objp->oargs.sarg = (char **)bmalloc
                                (objp->oargs.nsargs*sizeof(char *));
                if (objp->oargs.sarg == NULL)
                        goto memerr;
                for (i = 0; i < objp->oargs.nsargs; i++)
                        objp->oargs.sarg[i] = savestr(ogetstr(sbuf));
        } else
                objp->oargs.sarg = NULL;
#ifdef  IARGS
        if (objp->oargs.niargs = ogetint(2)) {
                objp->oargs.iarg = (long *)bmalloc
                                (objp->oargs.niargs*sizeof(long));
                if (objp->oargs.iarg == NULL)
                        goto memerr;
                for (i = 0; i < objp->oargs.niargs; i++)
                        objp->oargs.iarg[i] = ogetint(4);
        } else
                objp->oargs.iarg = NULL;
#endif
        if (objp->oargs.nfargs = ogetint(2)) {
                objp->oargs.farg = (FLOAT *)bmalloc
                                (objp->oargs.nfargs*sizeof(FLOAT));
                if (objp->oargs.farg == NULL)
                        goto memerr;
                for (i = 0; i < objp->oargs.nfargs; i++)
                        objp->oargs.farg[i] = ogetflt();
        } else
                objp->oargs.farg = NULL;
                                                /* initialize */
        objp->os = NULL;
        objp->lastrno = -1;
                                                /* insert */
        insertobject(obj);
        return(obj);
memerr:
        error(SYSTEM, "out of memory in getobj");
}


static
octerror(etyp, msg)                     /* octree error */
int  etyp;
char  *msg;
{
        char  msgbuf[128];

        sprintf(msgbuf, "(%s): %s", infn, msg);
        error(etyp, msgbuf);
}
Revision:	2.4
Committed:	Mon Jul 13 15:36:29 1992 UTC (31 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+39 -49 lines
Log Message:	moved portable i/o routines to portio.c
#	User	Rev	Content
1	greg	1.13	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* readoct.c - routines to read octree information.
9			*
10			* 7/30/85
11			*/
12
13			#include "standard.h"
14
15			#include "octree.h"
16
17			#include "object.h"
18
19			#include "otypes.h"
20
21	greg	2.4	static double ogetflt();
22			static long ogetint();
23			static char *ogetstr();
24	greg	1.16	static int getobj(), octerror();
25	greg	1.7	static OCTREE getfullnode(), gettree();
26	greg	1.1
27			static char infn; / input file name */
28			static FILE infp; / input file stream */
29	greg	1.14	static int objsize; /* size of stored OBJECT's */
30	greg	1.1	static OBJECT objorig; /* zeroeth object */
31			static short otypmap[NUMOTYPE+8]; /* object type map */
32
33
34			int
35			readoct(fname, load, scene, ofn) /* read in octree from file */
36			char *fname;
37			int load;
38			CUBE *scene;
39			char *ofn[];
40			{
41	greg	1.12	extern int fputs();
42	greg	1.11	char sbuf[512];
43	greg	1.1	int nf;
44	greg	1.8	OBJECT fnobjects;
45	greg	1.1	register int i;
46	greg	1.15	long m;
47	greg	1.1
48			if (fname == NULL) {
49			infn = "standard input";
50			infp = stdin;
51			} else {
52			infn = fname;
53			if ((infp = fopen(fname, "r")) == NULL) {
54			sprintf(errmsg, "cannot open octree file \"%s\"",
55			fname);
56			error(SYSTEM, errmsg);
57			}
58			}
59			/* get header */
60	greg	1.12	if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : NULL) < 0)
61			octerror(USER, "not an octree");
62	greg	1.1	/* check format */
63	greg	2.4	if ((objsize = ogetint(2)-OCTMAGIC) <= 0 \|\|
64	greg	1.14	objsize > MAXOBJSIZ \|\| objsize > sizeof(long))
65	greg	1.12	octerror(USER, "incompatible octree format");
66	greg	1.1	/* get boundaries */
67			if (load & IO_BOUNDS) {
68			for (i = 0; i < 3; i++)
69	greg	2.4	scene->cuorg[i] = atof(ogetstr(sbuf));
70			scene->cusize = atof(ogetstr(sbuf));
71	greg	1.1	} else {
72			for (i = 0; i < 4; i++)
73	greg	2.4	ogetstr(sbuf);
74	greg	1.1	}
75			objorig = nobjects; /* set object offset */
76			nf = 0; /* get object files */
77	greg	2.4	while (*ogetstr(sbuf)) {
78	greg	1.1	if (load & IO_SCENE)
79			readobj(sbuf);
80			if (load & IO_FILES)
81			ofn[nf] = savqstr(sbuf);
82			nf++;
83			}
84			if (load & IO_FILES)
85			ofn[nf] = NULL;
86	greg	1.8	/* get number of objects */
87	greg	2.4	fnobjects = m = ogetint(objsize);
88	greg	1.15	if (fnobjects != m)
89			octerror(USER, "too many objects");
90	greg	1.1
91			if (load & IO_TREE) {
92			/* get the octree */
93			scene->cutree = gettree();
94	greg	2.3	if (load & IO_SCENE) /* get the scene */
95			if (nf == 0) {
96	greg	2.4	for (i = 0; *ogetstr(sbuf); i++)
97	greg	1.1	if ((otypmap[i] = otype(sbuf)) < 0) {
98			sprintf(errmsg, "unknown type \"%s\"",
99			sbuf);
100			octerror(WARNING, errmsg);
101			}
102			while (getobj() != OVOID)
103			;
104	greg	2.3	} else { /* consistency checks */
105			/* check object count */
106	greg	1.13	if (nobjects != objorig+fnobjects)
107			octerror(USER, "bad object count; octree stale?");
108	greg	2.3	/* check for non-surfaces */
109	greg	1.13	if (nonsurfinset(objorig, fnobjects))
110	greg	2.3	octerror(USER, "modifier in tree; octree stale?");
111			}
112	greg	1.1	}
113			fclose(infp);
114			return(nf);
115			}
116
117
118			static char *
119	greg	2.4	ogetstr(s) /* get null-terminated string */
120	greg	1.1	char *s;
121			{
122	greg	2.4	extern char *getstr();
123	greg	1.1
124	greg	2.4	if (getstr(s, infp) == NULL)
125			octerror(USER, "truncated octree");
126			return(s);
127	greg	1.1	}
128
129
130			static OCTREE
131			getfullnode() /* get a set, return fullnode */
132			{
133			OBJECT set[MAXSET+1];
134			register int i;
135	greg	1.14	register long m;
136	greg	1.1
137	greg	2.4	if ((set[0] = ogetint(objsize)) > MAXSET)
138	greg	1.1	octerror(USER, "bad set in getfullnode");
139	greg	1.14	for (i = 1; i <= set[0]; i++) {
140	greg	2.4	m = ogetint(objsize) + objorig;
141	greg	1.15	if ((set[i] = m) != m)
142	greg	1.14	octerror(USER, "too many objects");
143			}
144	greg	1.1	return(fullnode(set));
145			}
146
147
148			static long
149	greg	2.4	ogetint(siz) /* get a siz-byte integer */
150			int siz;
151	greg	1.1	{
152	greg	2.4	extern long getint();
153	greg	1.3	register long r;
154	greg	1.1
155	greg	2.4	r = getint(siz, infp);
156			if (feof(infp))
157			octerror(USER, "truncated octree");
158	greg	1.1	return(r);
159			}
160
161
162			static double
163	greg	2.4	ogetflt() /* get a floating point number */
164	greg	1.1	{
165	greg	2.4	extern double getflt();
166			double r;
167	greg	1.1
168	greg	2.4	r = getflt(infp);
169			if (feof(infp))
170			octerror(USER, "truncated octree");
171			return(r);
172	greg	1.1	}
173
174
175			static OCTREE
176			gettree() /* get a pre-ordered octree */
177			{
178			register OCTREE ot;
179			register int i;
180
181			switch (getc(infp)) {
182			case OT_EMPTY:
183			return(EMPTY);
184			case OT_FULL:
185			return(getfullnode());
186			case OT_TREE:
187			if ((ot = octalloc()) == EMPTY)
188			octerror(SYSTEM, "out of tree space in gettree");
189			for (i = 0; i < 8; i++)
190			octkid(ot, i) = gettree();
191			return(ot);
192			case EOF:
193			octerror(USER, "truncated octree");
194			default:
195			octerror(USER, "damaged octree");
196			}
197			}
198
199
200			static
201			getobj() /* get next object */
202			{
203			char sbuf[MAXSTR];
204			int obj;
205			register int i;
206	greg	1.14	register long m;
207	greg	1.1	register OBJREC *objp;
208
209	greg	2.4	i = ogetint(1);
210	greg	1.3	if (i == -1)
211	greg	1.1	return(OVOID); /* terminator */
212			if ((obj = newobject()) == OVOID)
213			error(SYSTEM, "out of object space");
214			objp = objptr(obj);
215			if ((objp->otype = otypmap[i]) < 0)
216			octerror(USER, "reference to unknown type");
217	greg	2.4	if ((m = ogetint(objsize)) != OVOID) {
218	greg	1.14	m += objorig;
219			if ((OBJECT)m != m)
220			octerror(USER, "too many objects");
221			}
222			objp->omod = m;
223	greg	2.4	objp->oname = savqstr(ogetstr(sbuf));
224			if (objp->oargs.nsargs = ogetint(2)) {
225	greg	1.1	objp->oargs.sarg = (char **)bmalloc
226			(objp->oargs.nsargssizeof(char ));
227			if (objp->oargs.sarg == NULL)
228			goto memerr;
229			for (i = 0; i < objp->oargs.nsargs; i++)
230	greg	2.4	objp->oargs.sarg[i] = savestr(ogetstr(sbuf));
231	greg	1.1	} else
232			objp->oargs.sarg = NULL;
233			#ifdef IARGS
234	greg	2.4	if (objp->oargs.niargs = ogetint(2)) {
235	greg	1.1	objp->oargs.iarg = (long *)bmalloc
236			(objp->oargs.niargs*sizeof(long));
237			if (objp->oargs.iarg == NULL)
238			goto memerr;
239			for (i = 0; i < objp->oargs.niargs; i++)
240	greg	2.4	objp->oargs.iarg[i] = ogetint(4);
241	greg	1.1	} else
242			objp->oargs.iarg = NULL;
243			#endif
244	greg	2.4	if (objp->oargs.nfargs = ogetint(2)) {
245	greg	1.15	objp->oargs.farg = (FLOAT *)bmalloc
246			(objp->oargs.nfargs*sizeof(FLOAT));
247	greg	1.1	if (objp->oargs.farg == NULL)
248			goto memerr;
249			for (i = 0; i < objp->oargs.nfargs; i++)
250	greg	2.4	objp->oargs.farg[i] = ogetflt();
251	greg	1.1	} else
252			objp->oargs.farg = NULL;
253			/* initialize */
254			objp->os = NULL;
255			objp->lastrno = -1;
256			/* insert */
257			insertobject(obj);
258			return(obj);
259			memerr:
260			error(SYSTEM, "out of memory in getobj");
261			}
262
263
264			static
265			octerror(etyp, msg) /* octree error */
266			int etyp;
267			char *msg;
268			{
269			char msgbuf[128];
270
271			sprintf(msgbuf, "(%s): %s", infn, msg);
272			error(etyp, msgbuf);
273			}