src/common/readoct.c

#ifndef lint
static const char       RCSid[] = "$Id: readoct.c,v 2.25 2004/04/29 14:36:49 greg Exp $";
#endif
/*
 *  readoct.c - routines to read octree information.
 */

#include "copyright.h"

#include  <stdio.h>
#include  <time.h>

#include  "platform.h"
#include  "rtprocess.h"
#include  "standard.h"
#include  "octree.h"
#include  "object.h"
#include  "otypes.h"
#include  "resolu.h"

#ifdef getc_unlocked            /* avoid horrendous overhead of flockfile */
#undef getc
#define getc    getc_unlocked
#endif

static double  ogetflt(void);
static long  ogetint(int);
static char  *ogetstr(char *);
static int  nonsurfinset(OBJECT *);
static void  octerror(int  etyp, char  *msg);
static void  skiptree(void);
static OCTREE  getfullnode(void), gettree(void);

static char  *infn;                     /* input file specification */
static FILE  *infp;                     /* input file stream */
static int  objsize;                    /* size of stored OBJECT's */
static OBJECT  objorig;                 /* zeroeth object */
static OBJECT  fnobjects;               /* number of objects in this file */


int
readoct(inpspec, load, scene, ofn)      /* read in octree file or stream */
char  *inpspec;
int  load;
CUBE  *scene;
char  *ofn[];
{
        char  sbuf[512];
        int  nf;
        int  i;
        long  m;
        
        if (inpspec == NULL) {
                infn = "standard input";
                infp = stdin;
        } else if (inpspec[0] == '!') {
                infn = inpspec;
                if ((infp = popen(inpspec+1, "r")) == NULL) {
                        sprintf(errmsg, "cannot execute \"%s\"", inpspec);
                        error(SYSTEM, errmsg);
                }
        } else {
                infn = inpspec;
                if ((infp = fopen(inpspec, "r")) == NULL) {
                        sprintf(errmsg, "cannot open octree file \"%s\"",
                                        inpspec);
                        error(SYSTEM, errmsg);
                }
        }
        SET_FILE_BINARY(infp);
                                        /* get header */
        if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : (FILE *)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();
        else if (load & IO_SCENE && nf == 0)
                skiptree();
                
        if (load & IO_SCENE) {          /* get the scene */
            if (nf == 0) {
                                        /* load binary scene data */
                readscene(infp, objsize);

            } else {                    /* consistency checks */
                                /* check object count */
                if (nobjects != objorig+fnobjects)
                        octerror(USER, "bad object count; octree stale?");
                                /* check for non-surfaces */
                if (dosets(nonsurfinset))
                        octerror(USER, "modifier in tree; octree stale?");
            }
        }
                                /* close the input */
        if (infn[0] == '!')
                pclose(infp);
        else
                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");
        }
        return EMPTY; /* pro forma return */
}


static int
nonsurfinset(os)                        /* check set for modifier */
register OBJECT  *os;
{
        register OBJECT  s;
        register int  i;

        for (i = *os; i-- > 0; )
                if ((s = *++os) >= objorig && s < objorig+fnobjects &&
                                ismodifier(objptr(s)->otype))
                        return(1);
        return(0);
}


static void
skiptree(void)                          /* skip octree on input */
{
        register int  i;
        
        switch (getc(infp)) {
        case OT_EMPTY:
                return;
        case OT_FULL:
                for (i = ogetint(objsize)*objsize; i-- > 0; )
                        if (getc(infp) == EOF)
                                octerror(USER, "truncated octree");
                return;
        case OT_TREE:
                for (i = 0; i < 8; i++)
                        skiptree();
                return;
        case EOF:
                octerror(USER, "truncated octree");
        default:
                octerror(USER, "damaged octree");
        }
}


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

        sprintf(msgbuf, "(%s): %s", infn, msg);
        error(etyp, msgbuf);
}
Revision:	2.26
Committed:	Tue Sep 14 02:53:50 2004 UTC (21 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R6, rad3R6P1
Changes since 2.25:	+2 -1 lines
Log Message:	Added #undef for getc/putc where they were being replaced
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.26	static const char RCSid[] = "$Id: readoct.c,v 2.25 2004/04/29 14:36:49 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* readoct.c - routines to read octree information.
6	greg	2.13	*/
7
8	greg	2.14	#include "copyright.h"
9	greg	1.1
10	schorsch	2.17	#include <stdio.h>
11	greg	2.19	#include <time.h>
12	schorsch	2.17
13	greg	2.23	#include "platform.h"
14	schorsch	2.24	#include "rtprocess.h"
15	greg	1.1	#include "standard.h"
16			#include "octree.h"
17			#include "object.h"
18			#include "otypes.h"
19	schorsch	2.17	#include "resolu.h"
20	greg	1.1
21	greg	2.25	#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */
22	greg	2.26	#undef getc
23	greg	2.25	#define getc getc_unlocked
24			#endif
25
26	schorsch	2.20	static double ogetflt(void);
27			static long ogetint(int);
28			static char ogetstr(char );
29			static int nonsurfinset(OBJECT *);
30	schorsch	2.17	static void octerror(int etyp, char *msg);
31			static void skiptree(void);
32	schorsch	2.20	static OCTREE getfullnode(void), gettree(void);
33	greg	1.1
34	greg	2.13	static char infn; / input file specification */
35	greg	1.1	static FILE infp; / input file stream */
36	greg	1.14	static int objsize; /* size of stored OBJECT's */
37	greg	1.1	static OBJECT objorig; /* zeroeth object */
38	greg	2.12	static OBJECT fnobjects; /* number of objects in this file */
39	greg	1.1
40
41			int
42	greg	2.13	readoct(inpspec, load, scene, ofn) /* read in octree file or stream */
43			char *inpspec;
44	greg	1.1	int load;
45			CUBE *scene;
46			char *ofn[];
47			{
48	greg	1.11	char sbuf[512];
49	greg	1.1	int nf;
50	greg	2.15	int i;
51	greg	1.15	long m;
52	greg	1.1
53	greg	2.13	if (inpspec == NULL) {
54	greg	1.1	infn = "standard input";
55			infp = stdin;
56	greg	2.13	} else if (inpspec[0] == '!') {
57			infn = inpspec;
58			if ((infp = popen(inpspec+1, "r")) == NULL) {
59			sprintf(errmsg, "cannot execute \"%s\"", inpspec);
60			error(SYSTEM, errmsg);
61			}
62	greg	1.1	} else {
63	greg	2.13	infn = inpspec;
64			if ((infp = fopen(inpspec, "r")) == NULL) {
65	greg	1.1	sprintf(errmsg, "cannot open octree file \"%s\"",
66	greg	2.13	inpspec);
67	greg	1.1	error(SYSTEM, errmsg);
68			}
69			}
70	schorsch	2.16	SET_FILE_BINARY(infp);
71	greg	1.1	/* get header */
72	greg	2.11	if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : (FILE *)NULL) < 0)
73	greg	1.12	octerror(USER, "not an octree");
74	greg	1.1	/* check format */
75	greg	2.4	if ((objsize = ogetint(2)-OCTMAGIC) <= 0 \|\|
76	greg	1.14	objsize > MAXOBJSIZ \|\| objsize > sizeof(long))
77	greg	1.12	octerror(USER, "incompatible octree format");
78	greg	1.1	/* get boundaries */
79			if (load & IO_BOUNDS) {
80			for (i = 0; i < 3; i++)
81	greg	2.4	scene->cuorg[i] = atof(ogetstr(sbuf));
82			scene->cusize = atof(ogetstr(sbuf));
83	greg	1.1	} else {
84			for (i = 0; i < 4; i++)
85	greg	2.4	ogetstr(sbuf);
86	greg	1.1	}
87			objorig = nobjects; /* set object offset */
88			nf = 0; /* get object files */
89	greg	2.4	while (*ogetstr(sbuf)) {
90	greg	1.1	if (load & IO_SCENE)
91			readobj(sbuf);
92			if (load & IO_FILES)
93			ofn[nf] = savqstr(sbuf);
94			nf++;
95			}
96			if (load & IO_FILES)
97			ofn[nf] = NULL;
98	greg	1.8	/* get number of objects */
99	greg	2.4	fnobjects = m = ogetint(objsize);
100	greg	1.15	if (fnobjects != m)
101			octerror(USER, "too many objects");
102	greg	1.1
103	greg	2.13	if (load & IO_TREE) /* get the octree */
104	greg	1.1	scene->cutree = gettree();
105	greg	2.5	else if (load & IO_SCENE && nf == 0)
106			skiptree();
107
108	schorsch	2.21	if (load & IO_SCENE) { /* get the scene */
109	greg	2.5	if (nf == 0) {
110	greg	2.15	/* load binary scene data */
111			readscene(infp, objsize);
112
113	greg	2.5	} else { /* consistency checks */
114			/* check object count */
115			if (nobjects != objorig+fnobjects)
116			octerror(USER, "bad object count; octree stale?");
117			/* check for non-surfaces */
118	greg	2.12	if (dosets(nonsurfinset))
119	greg	2.5	octerror(USER, "modifier in tree; octree stale?");
120			}
121	schorsch	2.21	}
122	greg	2.13	/* close the input */
123			if (infn[0] == '!')
124			pclose(infp);
125			else
126			fclose(infp);
127	greg	1.1	return(nf);
128			}
129
130
131			static char *
132	greg	2.4	ogetstr(s) /* get null-terminated string */
133	greg	1.1	char *s;
134			{
135	greg	2.4	extern char *getstr();
136	greg	1.1
137	greg	2.4	if (getstr(s, infp) == NULL)
138			octerror(USER, "truncated octree");
139			return(s);
140	greg	1.1	}
141
142
143			static OCTREE
144			getfullnode() /* get a set, return fullnode */
145			{
146	greg	2.7	OBJECT set[MAXSET+1];
147	greg	1.1	register int i;
148	greg	1.14	register long m;
149	greg	1.1
150	greg	2.4	if ((set[0] = ogetint(objsize)) > MAXSET)
151	greg	1.1	octerror(USER, "bad set in getfullnode");
152	greg	1.14	for (i = 1; i <= set[0]; i++) {
153	greg	2.4	m = ogetint(objsize) + objorig;
154	greg	1.15	if ((set[i] = m) != m)
155	greg	1.14	octerror(USER, "too many objects");
156			}
157	greg	1.1	return(fullnode(set));
158			}
159
160
161			static long
162	greg	2.4	ogetint(siz) /* get a siz-byte integer */
163			int siz;
164	greg	1.1	{
165	greg	2.4	extern long getint();
166	greg	1.3	register long r;
167	greg	1.1
168	greg	2.4	r = getint(siz, infp);
169			if (feof(infp))
170			octerror(USER, "truncated octree");
171	greg	1.1	return(r);
172			}
173
174
175			static double
176	greg	2.4	ogetflt() /* get a floating point number */
177	greg	1.1	{
178	greg	2.4	extern double getflt();
179	greg	2.7	double r;
180	greg	1.1
181	greg	2.4	r = getflt(infp);
182			if (feof(infp))
183			octerror(USER, "truncated octree");
184			return(r);
185	greg	1.1	}
186
187
188			static OCTREE
189			gettree() /* get a pre-ordered octree */
190			{
191	greg	2.7	register OCTREE ot;
192	greg	1.1	register int i;
193
194			switch (getc(infp)) {
195			case OT_EMPTY:
196			return(EMPTY);
197			case OT_FULL:
198			return(getfullnode());
199			case OT_TREE:
200			if ((ot = octalloc()) == EMPTY)
201			octerror(SYSTEM, "out of tree space in gettree");
202			for (i = 0; i < 8; i++)
203			octkid(ot, i) = gettree();
204			return(ot);
205	greg	2.5	case EOF:
206			octerror(USER, "truncated octree");
207			default:
208			octerror(USER, "damaged octree");
209			}
210	greg	2.22	return EMPTY; /* pro forma return */
211	greg	2.12	}
212
213
214			static int
215			nonsurfinset(os) /* check set for modifier */
216			register OBJECT *os;
217			{
218			register OBJECT s;
219			register int i;
220
221			for (i = *os; i-- > 0; )
222			if ((s = *++os) >= objorig && s < objorig+fnobjects &&
223			ismodifier(objptr(s)->otype))
224			return(1);
225			return(0);
226	greg	2.5	}
227
228
229	schorsch	2.17	static void
230			skiptree(void) /* skip octree on input */
231	greg	2.5	{
232			register int i;
233
234			switch (getc(infp)) {
235			case OT_EMPTY:
236			return;
237			case OT_FULL:
238	greg	2.6	for (i = ogetint(objsize)*objsize; i-- > 0; )
239			if (getc(infp) == EOF)
240			octerror(USER, "truncated octree");
241	greg	2.5	return;
242			case OT_TREE:
243			for (i = 0; i < 8; i++)
244			skiptree();
245			return;
246	greg	1.1	case EOF:
247			octerror(USER, "truncated octree");
248			default:
249			octerror(USER, "damaged octree");
250			}
251			}
252
253
254	schorsch	2.17	static void
255	greg	1.1	octerror(etyp, msg) /* octree error */
256			int etyp;
257			char *msg;
258			{
259			char msgbuf[128];
260
261			sprintf(msgbuf, "(%s): %s", infn, msg);
262			error(etyp, msgbuf);
263			}