src/common/readoct.c

#ifndef lint
static const char       RCSid[] = "$Id: readoct.c,v 2.36 2025/04/23 01:57:04 greg Exp $";
#endif
/*
 *  readoct.c - routines to read octree information.
 */

#include "copyright.h"

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

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

static double  ogetflt(void);
static long  ogetint(int);
static char  *ogetstr(char *);
static int  nonsurfintree(OCTREE ot);
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(                                /* read in octree file or stream */
        char  *inpspec,
        int  load,
        CUBE  *scene,
        char  *ofn[]
)
{
        time_t  oct_t = 0;
        time_t  last_it = 0;
        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);
                }
                oct_t = fddate(fileno(infp));
        }
#ifdef getc_unlocked                    /* avoid stupid semaphores */
        flockfile(infp);
#endif
        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);
                if (oct_t > last_it) {
                        time_t  t = fdate(sbuf);
                        if (t > last_it)
                                last_it = t;
                }
                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 (oct_t <= last_it && nonsurfintree(scene->cutree))
                        octerror(USER, "modifier in tree; octree stale?");
            }
        }
                                /* close the input */
        if (inpspec[0] == '!') {
                if (pclose(infp) != 0) {
                        sprintf(errmsg, "bad status from \"%s\"", inpspec);
                        error(WARNING, errmsg);
                }
        } else if (infp != stdin)
                fclose(infp);
#ifdef getc_unlocked
        else
                funlockfile(infp);
#endif
        return(nf);
}


static char *
ogetstr(char *s)                /* get null-terminated string */
{
        if (getstr(s, infp) == NULL)
                octerror(USER, "truncated octree");
        return(s);
}


static OCTREE
getfullnode()                   /* get a set, return fullnode */
{
        OBJECT  set[MAXSET+1];
        int  i;
        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(int siz)                /* get a siz-byte integer */
{
        long  r;

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


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

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

static OCTREE
gettree()                       /* get a pre-ordered octree */
{
        OCTREE   ot;
        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
nonsurfintree(OCTREE ot)                /* check tree for modifiers */
{
        OBJECT  set[MAXSET+1];
        int  i;

        if (isempty(ot))
                return(0);
        if (istree(ot)) {
                for (i = 0; i < 8; i++)
                        if (nonsurfintree(octkid(ot, i)))
                                return(1);
                return(0);
        }
        objset(set, ot);
        for (i = set[0]; i > 0; i-- )
                if (ismodifier(objptr(set[i])->otype))
                        return(1);
        return(0);
}


static void
skiptree(void)                          /* skip octree on input */
{
        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(int etyp, char *msg)           /* octree error */
{
        char  msgbuf[128];

        sprintf(msgbuf, "(%s): %s", infn, msg);
        error(etyp, msgbuf);
}
Revision:	2.37
Committed:	Sat Jun 7 05:09:45 2025 UTC (18 hours, 17 minutes ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 2.36:	+1 -2 lines
Log Message:	refactor: Put some declarations into "paths.h" and included in "platform.h"
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.37	static const char RCSid[] = "$Id: readoct.c,v 2.36 2025/04/23 01:57:04 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	greg	1.1	#include "standard.h"
15			#include "octree.h"
16			#include "object.h"
17			#include "otypes.h"
18	schorsch	2.17	#include "resolu.h"
19	greg	1.1
20	schorsch	2.20	static double ogetflt(void);
21			static long ogetint(int);
22			static char ogetstr(char );
23	greg	2.27	static int nonsurfintree(OCTREE ot);
24	schorsch	2.17	static void octerror(int etyp, char *msg);
25			static void skiptree(void);
26	schorsch	2.20	static OCTREE getfullnode(void), gettree(void);
27	greg	1.1
28	greg	2.13	static char infn; / input file specification */
29	greg	1.1	static FILE infp; / input file stream */
30	greg	1.14	static int objsize; /* size of stored OBJECT's */
31	greg	1.1	static OBJECT objorig; /* zeroeth object */
32	greg	2.12	static OBJECT fnobjects; /* number of objects in this file */
33	greg	1.1
34
35			int
36	greg	2.27	readoct( /* read in octree file or stream */
37			char *inpspec,
38			int load,
39			CUBE *scene,
40			char *ofn[]
41			)
42	greg	1.1	{
43	greg	2.33	time_t oct_t = 0;
44			time_t last_it = 0;
45	greg	1.11	char sbuf[512];
46	greg	1.1	int nf;
47	greg	2.15	int i;
48	greg	1.15	long m;
49	greg	1.1
50	greg	2.13	if (inpspec == NULL) {
51	greg	1.1	infn = "standard input";
52			infp = stdin;
53	greg	2.13	} else if (inpspec[0] == '!') {
54			infn = inpspec;
55			if ((infp = popen(inpspec+1, "r")) == NULL) {
56			sprintf(errmsg, "cannot execute \"%s\"", inpspec);
57			error(SYSTEM, errmsg);
58			}
59	greg	1.1	} else {
60	greg	2.13	infn = inpspec;
61			if ((infp = fopen(inpspec, "r")) == NULL) {
62	greg	1.1	sprintf(errmsg, "cannot open octree file \"%s\"",
63	greg	2.13	inpspec);
64	greg	1.1	error(SYSTEM, errmsg);
65			}
66	greg	2.33	oct_t = fddate(fileno(infp));
67	greg	1.1	}
68	greg	2.32	#ifdef getc_unlocked /* avoid stupid semaphores */
69			flockfile(infp);
70			#endif
71	schorsch	2.16	SET_FILE_BINARY(infp);
72	greg	1.1	/* get header */
73	greg	2.11	if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : (FILE *)NULL) < 0)
74	greg	1.12	octerror(USER, "not an octree");
75	greg	1.1	/* check format */
76	greg	2.4	if ((objsize = ogetint(2)-OCTMAGIC) <= 0 \|\|
77	greg	1.14	objsize > MAXOBJSIZ \|\| objsize > sizeof(long))
78	greg	1.12	octerror(USER, "incompatible octree format");
79	greg	1.1	/* get boundaries */
80			if (load & IO_BOUNDS) {
81			for (i = 0; i < 3; i++)
82	greg	2.4	scene->cuorg[i] = atof(ogetstr(sbuf));
83			scene->cusize = atof(ogetstr(sbuf));
84	greg	1.1	} else {
85			for (i = 0; i < 4; i++)
86	greg	2.4	ogetstr(sbuf);
87	greg	1.1	}
88			objorig = nobjects; /* set object offset */
89			nf = 0; /* get object files */
90	greg	2.4	while (*ogetstr(sbuf)) {
91	greg	1.1	if (load & IO_SCENE)
92			readobj(sbuf);
93			if (load & IO_FILES)
94			ofn[nf] = savqstr(sbuf);
95	greg	2.33	if (oct_t > last_it) {
96			time_t t = fdate(sbuf);
97			if (t > last_it)
98			last_it = t;
99			}
100	greg	1.1	nf++;
101			}
102			if (load & IO_FILES)
103			ofn[nf] = NULL;
104	greg	1.8	/* get number of objects */
105	greg	2.4	fnobjects = m = ogetint(objsize);
106	greg	1.15	if (fnobjects != m)
107			octerror(USER, "too many objects");
108	greg	1.1
109	greg	2.13	if (load & IO_TREE) /* get the octree */
110	greg	1.1	scene->cutree = gettree();
111	greg	2.5	else if (load & IO_SCENE && nf == 0)
112			skiptree();
113
114	schorsch	2.21	if (load & IO_SCENE) { /* get the scene */
115	greg	2.5	if (nf == 0) {
116	greg	2.15	/* load binary scene data */
117			readscene(infp, objsize);
118
119	greg	2.5	} else { /* consistency checks */
120			/* check object count */
121			if (nobjects != objorig+fnobjects)
122			octerror(USER, "bad object count; octree stale?");
123			/* check for non-surfaces */
124	greg	2.33	if (oct_t <= last_it && nonsurfintree(scene->cutree))
125	greg	2.5	octerror(USER, "modifier in tree; octree stale?");
126			}
127	schorsch	2.21	}
128	greg	2.13	/* close the input */
129	greg	2.34	if (inpspec[0] == '!') {
130			if (pclose(infp) != 0) {
131			sprintf(errmsg, "bad status from \"%s\"", inpspec);
132	greg	2.35	error(WARNING, errmsg);
133	greg	2.34	}
134			} else if (infp != stdin)
135	greg	2.13	fclose(infp);
136	greg	2.32	#ifdef getc_unlocked
137			else
138			funlockfile(infp);
139			#endif
140	greg	1.1	return(nf);
141			}
142
143
144			static char *
145	greg	2.27	ogetstr(char s) / get null-terminated string */
146	greg	1.1	{
147	greg	2.4	if (getstr(s, infp) == NULL)
148			octerror(USER, "truncated octree");
149			return(s);
150	greg	1.1	}
151
152
153			static OCTREE
154			getfullnode() /* get a set, return fullnode */
155			{
156	greg	2.7	OBJECT set[MAXSET+1];
157	greg	2.36	int i;
158			long m;
159	greg	1.1
160	greg	2.4	if ((set[0] = ogetint(objsize)) > MAXSET)
161	greg	1.1	octerror(USER, "bad set in getfullnode");
162	greg	1.14	for (i = 1; i <= set[0]; i++) {
163	greg	2.4	m = ogetint(objsize) + objorig;
164	greg	1.15	if ((set[i] = m) != m)
165	greg	1.14	octerror(USER, "too many objects");
166			}
167	greg	1.1	return(fullnode(set));
168			}
169
170
171			static long
172	greg	2.27	ogetint(int siz) /* get a siz-byte integer */
173	greg	1.1	{
174	greg	2.36	long r;
175	greg	1.1
176	greg	2.4	r = getint(siz, infp);
177			if (feof(infp))
178			octerror(USER, "truncated octree");
179	greg	1.1	return(r);
180			}
181
182
183			static double
184	greg	2.4	ogetflt() /* get a floating point number */
185	greg	1.1	{
186	greg	2.7	double r;
187	greg	1.1
188	greg	2.4	r = getflt(infp);
189			if (feof(infp))
190			octerror(USER, "truncated octree");
191			return(r);
192	greg	1.1	}
193
194
195			static OCTREE
196			gettree() /* get a pre-ordered octree */
197			{
198	greg	2.36	OCTREE ot;
199			int i;
200	greg	1.1
201			switch (getc(infp)) {
202			case OT_EMPTY:
203			return(EMPTY);
204			case OT_FULL:
205			return(getfullnode());
206			case OT_TREE:
207			if ((ot = octalloc()) == EMPTY)
208			octerror(SYSTEM, "out of tree space in gettree");
209			for (i = 0; i < 8; i++)
210			octkid(ot, i) = gettree();
211			return(ot);
212	greg	2.5	case EOF:
213			octerror(USER, "truncated octree");
214			default:
215			octerror(USER, "damaged octree");
216			}
217	greg	2.22	return EMPTY; /* pro forma return */
218	greg	2.12	}
219
220
221			static int
222	greg	2.27	nonsurfintree(OCTREE ot) /* check tree for modifiers */
223	greg	2.12	{
224	greg	2.27	OBJECT set[MAXSET+1];
225	greg	2.36	int i;
226	greg	2.12
227	greg	2.27	if (isempty(ot))
228			return(0);
229			if (istree(ot)) {
230			for (i = 0; i < 8; i++)
231			if (nonsurfintree(octkid(ot, i)))
232			return(1);
233			return(0);
234			}
235			objset(set, ot);
236	greg	2.28	for (i = set[0]; i > 0; i-- )
237	greg	2.27	if (ismodifier(objptr(set[i])->otype))
238	greg	2.12	return(1);
239			return(0);
240	greg	2.5	}
241
242
243	schorsch	2.17	static void
244			skiptree(void) /* skip octree on input */
245	greg	2.5	{
246	greg	2.36	int i;
247	greg	2.5
248			switch (getc(infp)) {
249			case OT_EMPTY:
250			return;
251			case OT_FULL:
252	greg	2.6	for (i = ogetint(objsize)*objsize; i-- > 0; )
253			if (getc(infp) == EOF)
254			octerror(USER, "truncated octree");
255	greg	2.5	return;
256			case OT_TREE:
257			for (i = 0; i < 8; i++)
258			skiptree();
259			return;
260	greg	1.1	case EOF:
261			octerror(USER, "truncated octree");
262			default:
263			octerror(USER, "damaged octree");
264			}
265			}
266
267
268	schorsch	2.17	static void
269	greg	2.27	octerror(int etyp, char msg) / octree error */
270	greg	1.1	{
271			char msgbuf[128];
272
273			sprintf(msgbuf, "(%s): %s", infn, msg);
274			error(etyp, msgbuf);
275			}