src/hd/rholo.c

/* Copyright (c) 1997 Silicon Graphics, Inc. */

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

/*
 * Radiance holodeck generation controller
 */

#include "rholo.h"
#include "random.h"
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>

                        /* the following must be consistent with rholo.h */
int     NVARS = NRHVARS;                /* total number of variables */

VARIABLE        vv[] = RHVINIT;         /* variable-value pairs */

char    *progname;              /* our program name */
char    *hdkfile;               /* holodeck file name */
char    froot[256];             /* root file name */

int     nowarn = 0;             /* turn warnings off? */

int     ncprocs = 0;            /* desired number of compute processes */

char    *outdev = NULL;         /* output device name */

int     readinp = 0;            /* read commands from stdin */

int     force = 0;              /* allow overwrite of holodeck */

time_t  starttime;              /* time we got started */
time_t  endtime;                /* time we should end by */
time_t  reporttime;             /* time for next report */

long    maxdisk;                /* maximum file space (bytes) */

int     rtargc = 1;             /* rtrace command */
char    *rtargv[128] = {"rtrace", NULL};

int     orig_mode = -1;         /* original file mode (-1 if unchanged) */

long    nraysdone = 0L;         /* number of rays done */
long    npacksdone = 0L;        /* number of packets done */

PACKET  *freepacks;             /* available packets */

char  *sigerr[NSIG];            /* signal error messages */

extern time_t   time();


main(argc, argv)
int     argc;
char    *argv[];
{
        int     i;
                                                /* mark start time */
        starttime = time(NULL);
        initurand(16384);                       /* initialize urand */
        progname = argv[0];                     /* get arguments */
        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'w':                       /* turn off warnings */
                        nowarn++;
                        break;
                case 'f':                       /* force overwrite */
                        force++;
                        break;
                case 'i':                       /* read input from stdin */
                        readinp++;
                        break;
                case 'n':                       /* compute processes */
                        if (i >= argc-2)
                                goto userr;
                        ncprocs = atoi(argv[++i]);
                        break;
                case 'o':                       /* output display */
                        if (i >= argc-2)
                                goto userr;
                        outdev = argv[++i];
                        break;
                default:
                        goto userr;
                }
                                                /* get root file name */
        rootname(froot, hdkfile=argv[i++]);
                                                /* load variables? */
        if (i < argc)
                if (argv[i][0] != '-' && argv[i][0] != '+')
                        loadvars(argv[i]);      /* load variables from file */

        if (i >= argc || argv[i][0] == '+')
                loadholo();                     /* load existing holodeck */

        while (++i < argc)                      /* get command line settings */
                if (setvariable(argv[i], matchvar) < 0) {
                        sprintf(errmsg, "unknown variable: %s", argv[i]);
                        error(USER, errmsg);
                }
                                                /* check settings */
        checkvalues();
                                                /* load RIF if any */
        getradfile();

        if (hdlist[0] == NULL) {                /* create new holodeck */
                HDGRID  hdg[HDMAX];
                                                        /* set defaults */
                setdefaults(hdg);
                                                        /* holodeck exists? */
                if (!force && access(hdkfile, R_OK|W_OK) == 0)
                        error(USER,
                                "holodeck file exists -- use -f to overwrite");
                                                        /* create holodeck */
                creatholo(hdg);
        } else                                  /* else just set defaults */
                setdefaults(NULL);
                                                /* initialize */
        initrholo();
                                                /* main loop */
        while (rholo())
                ;
                                                /* done */
        quit(0);
userr:
        fprintf(stderr,
"Usage: %s [-n nprocs][-o disp][-w][-f] output.hdk [control.hif|+|- [VAR=val ..]]\n",
                        progname);
        quit(1);
}


onsig(signo)                            /* fatal signal */
int  signo;
{
        static int  gotsig = 0;

        if (gotsig++)                   /* two signals and we're gone! */
                _exit(signo);

        alarm(60);                      /* allow 60 seconds to clean up */
        signal(SIGALRM, SIG_DFL);       /* make certain we do die */
        eputs("signal - ");
        eputs(sigerr[signo]);
        eputs("\n");
        quit(3);
}


sigdie(signo, msg)                      /* set fatal signal */
int  signo;
char  *msg;
{
        if (signal(signo, onsig) == SIG_IGN)
                signal(signo, SIG_IGN);
        sigerr[signo] = msg;
}


int
resfmode(fd, mod)               /* restrict open file access mode */
int     fd, mod;
{
        struct stat     stbuf;
                                        /* get original mode */
        if (fstat(fd, &stbuf) < 0)
                error(SYSTEM, "cannot stat open holodeck file");
        mod &= stbuf.st_mode;           /* always more restrictive */
        if (mod == stbuf.st_mode)
                return(-1);             /* already set */
                                        /* else change it */
        if (fchmod(fd, mod) < 0) {
                error(WARNING, "cannot change holodeck file access mode");
                return(-1);
        }
        return(stbuf.st_mode);          /* return original mode */
}


initrholo()                     /* get our holodeck running */
{
        extern int      global_packet();
        register int    i;
                                                /* close holodeck on exec() */
        fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);

        if (outdev != NULL)                     /* open output device */
                disp_open(outdev);
        else if (ncprocs > 0)                   /* else use global ray feed */
                init_global();
                                                /* record disk space limit */
        if (!vdef(DISKSPACE))
                maxdisk = 0;
        else
                maxdisk = 1024.*1024.*vflt(DISKSPACE);
                                                /* record end time */
        if (!vdef(TIME) || vflt(TIME) <= FTINY)
                endtime = 0;
        else
                endtime = starttime + vflt(TIME)*3600. + .5;
                                                /* set up memory cache */
        if (outdev == NULL)
                hdcachesize = 0;        /* manual flushing */
        else if (vdef(CACHE))
                hdcachesize = 1024.*1024.*vflt(CACHE);
                                                /* open report file */
        if (vdef(REPORT)) {
                register char   *s = sskip2(vval(REPORT), 1);
                if (*s && freopen(s, "a", stderr) == NULL)
                        quit(2);
        }
                                                /* start rtrace */
        if (ncprocs > 0) {
                i = start_rtrace();
                if (i < 1)
                        error(USER, "cannot start rtrace process(es)");
                if (vdef(REPORT)) {             /* make first report */
                        printargs(rtargc, rtargv, stderr);
                        report(0);
                }
                                                /* allocate packets */
                freepacks = (PACKET *)bmalloc(i*sizeof(PACKET));
                if (freepacks == NULL)
                        goto memerr;
                freepacks[--i].nr = 0;
                freepacks[i].next = NULL;
                if (!vdef(OBSTRUCTIONS) || !vbool(OBSTRUCTIONS)) {
                        freepacks[i].offset = (float *)bmalloc(
                                        RPACKSIZ*sizeof(float)*(i+1) );
                        if (freepacks[i].offset == NULL)
                                goto memerr;
                } else
                        freepacks[i].offset = NULL;
                while (i--) {
                        freepacks[i].nr = 0;
                        freepacks[i].offset = freepacks[i+1].offset == NULL ?
                                        NULL : freepacks[i+1].offset+RPACKSIZ ;
                        freepacks[i].next = &freepacks[i+1];
                }
        }
                                        /* set up signal handling */
        sigdie(SIGINT, "Interrupt");
        sigdie(SIGHUP, "Hangup");
        sigdie(SIGTERM, "Terminate");
        sigdie(SIGPIPE, "Broken pipe");
        sigdie(SIGALRM, "Alarm clock");
#ifdef  SIGXCPU
        sigdie(SIGXCPU, "CPU limit exceeded");
        sigdie(SIGXFSZ, "File size exceeded");
#endif
                                                /* protect holodeck file */
        orig_mode = resfmode(hdlist[0]->fd, ncprocs>0 ? 0 : 0444);
        return;
memerr:
        error(SYSTEM, "out of memory in initrholo");
}


rholo()                         /* holodeck main loop */
{
        static int      idle = 1;
        PACKET  *pl = NULL, *plend;
        register PACKET *p;
        time_t  t;
        long    l;

        if (outdev != NULL)             /* check display */
                if (!disp_check(idle))
                        return(0);
                                        /* display only? */
        if (nprocs <= 0) {
                idle = 1;
                return(outdev != NULL);
        }
                                        /* check file size */
        if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
                error(WARNING, "file limit exceeded");
                done_rtrace();
                return(1);      /* comes back */
        }
                                        /* check time */
        if (endtime > 0 || reporttime > 0)
                t = time(NULL);
        if (endtime > 0 && t >= endtime) {
                error(WARNING, "time limit exceeded");
                done_rtrace();
                return(1);      /* comes back */
        }
        if (reporttime > 0 && t >= reporttime)
                report(t);
        idle = 0;                       /* get packets to process */
        while (freepacks != NULL) {
                p = freepacks; freepacks = p->next; p->next = NULL;
                if (!next_packet(p)) {
                        p->next = freepacks; freepacks = p;
                        idle = 1;
                        break;
                }
                if (pl == NULL) pl = p;
                else plend->next = p;
                plend = p;
        }
                                        /* process packets */
        done_packets(do_packets(pl));
        return(1);                      /* and continue */
}


setdefaults(gp)                 /* set default values */
register HDGRID *gp;
{
        extern char     *atos();
        register int    i;
        int     n;
        double  len[3], maxlen, d;
        char    buf[64];

        if (!vdef(SECTION)) {
                sprintf(errmsg, "%s must be defined", vnam(SECTION));
                error(USER, errmsg);
        }
        if (!vdef(OCTREE)) {
                if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
                        error(SYSTEM, "out of memory");
                sprintf(vval(OCTREE), "%s.oct", froot);
                vdef(OCTREE)++;
        }
        if (!vdef(VDIST)) {
                vval(VDIST) = "F";
                vdef(VDIST)++;
        }
                                /* append rendering options */
        if (vdef(RENDER))
                rtargc += wordstring(rtargv+rtargc, vval(RENDER));
        
        if (gp == NULL)         /* already initialized? */
                return;
                                /* set grid parameters */
        for (n = 0; n < vdef(SECTION); n++, gp++) {
                gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
                if (sscanf(nvalue(SECTION, n),
                "%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
                                &gp->orig[0], &gp->orig[1], &gp->orig[2],
                                &gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
                                &gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
                                &gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2],
                                &gp->grid[0], &gp->grid[1], &gp->grid[2]) < 12)
                        badvalue(SECTION);
                maxlen = 0.;
                for (i = 0; i < 3; i++)
                        if ((len[i] = VLEN(gp->xv[i])) > maxlen)
                                maxlen = len[i];
                if (!vdef(GRID))
                        d = 0.125*maxlen;
                else if ((d = vflt(GRID)) <= FTINY)
                        badvalue(GRID);
                for (i = 0; i < 3; i++)
                        if (gp->grid[i] <= 0)
                                gp->grid[i] = len[i]/d + (1.-FTINY);
        }
}


creatholo(gp)                   /* create a holodeck output file */
HDGRID  *gp;
{
        extern char     VersionID[];
        int4    lastloc, nextloc;
        int     n;
        int     fd;
        FILE    *fp;
                                        /* open & truncate file */
        if ((fp = fopen(hdkfile, "w+")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
                error(SYSTEM, errmsg);
        }
                                        /* write information header */
        newheader("RADIANCE", fp);
        fprintf(fp, "SOFTWARE= %s\n", VersionID);
        printvars(fp);
        fputformat(HOLOFMT, fp);
        fputc('\n', fp);
        putw(HOLOMAGIC, fp);            /* put magic number */
        fd = dup(fileno(fp));
        fclose(fp);                     /* flush and close stdio stream */
        lastloc = lseek(fd, 0L, 2);
        for (n = vdef(SECTION); n--; gp++) {    /* initialize each section */
                nextloc = 0L;
                write(fd, (char *)&nextloc, sizeof(nextloc));
                hdinit(fd, gp);                 /* writes beam index */
                if (!n)
                        break;
                nextloc = hdfilen(fd);          /* write section pointer */
                if (lseek(fd, (long)lastloc, 0) < 0)
                        error(SYSTEM,
                                "cannot seek on holodeck file in creatholo");
                write(fd, (char *)&nextloc, sizeof(nextloc));
                lseek(fd, (long)(lastloc=nextloc), 0);
        }
}


headline(s)                     /* process information header line */
char    *s;
{
        extern char     FMTSTR[];
        register char   *cp;
        char    fmt[32];

        if (formatval(fmt, s)) {
                if (strcmp(fmt, HOLOFMT)) {
                        sprintf(errmsg, "%s file \"%s\" has %s%s",
                                        HOLOFMT, hdkfile, FMTSTR, fmt);
                        error(USER, errmsg);
                }
                return;
        }
        for (cp = s; *cp; cp++)         /* take off any comments */
                if (*cp == '#') {
                        *cp = '\0';
                        break;
                }
        setvariable(s, matchvar);       /* don't flag errors */
}


loadholo()                      /* start loading a holodeck from fname */
{
        extern long     ftell();
        FILE    *fp;
        int     fd;
        int     n;
        int4    nextloc;
                                        /* open holodeck file */
        if ((fp = fopen(hdkfile, ncprocs>0 ? "r+" : "r")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\" for %s", hdkfile,
                                ncprocs>0 ? "appending" : "reading");
                error(SYSTEM, errmsg);
        }
                                        /* load variables from header */
        getheader(fp, headline, NULL);
                                        /* check magic number */
        if (getw(fp) != HOLOMAGIC) {
                sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
                                hdkfile);
                error(USER, errmsg);
        }
        nextloc = ftell(fp);                    /* get stdio position */
        fd = dup(fileno(fp));
        fclose(fp);                             /* done with stdio */
        for (n = 0; nextloc > 0L; n++) {        /* initialize each section */
                lseek(fd, (long)nextloc, 0);
                read(fd, (char *)&nextloc, sizeof(nextloc));
                hdinit(fd, NULL);
        }
        if (n != vdef(SECTION)) {
                sprintf(errmsg, "number of sections does not match %s setting",
                                vnam(SECTION));
                error(WARNING, errmsg);
        }
}


done_packets(pl)                /* handle finished packets */
PACKET  *pl;
{
        static int      n2flush = 0;
        register PACKET *p;

        while (pl != NULL) {
                p = pl; pl = p->next; p->next = NULL;
                if (p->nr > 0) {                /* add to holodeck */
                        bcopy((char *)p->ra,
                                (char *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
                                p->nr*sizeof(RAYVAL));
                        if (outdev != NULL)     /* display it */
                                disp_packet((PACKHEAD *)p);
                        if (hdcachesize <= 0)   /* manual flushing */
                                n2flush += p->nr;
                        nraysdone += p->nr;
                        npacksdone++;
                }
                p->nr = 0;                      /* push onto free list */
                p->next = freepacks;
                freepacks = p;
        }
        if (n2flush > 512*RPACKSIZ*nprocs) {
                hdflush(NULL);                  /* flush holodeck buffers */
                n2flush = 0;
        }
}


rootname(rn, fn)                /* remove tail from end of fn */
register char   *rn, *fn;
{
        char    *tp, *dp;

        for (tp = NULL, dp = rn; *rn = *fn++; rn++)
                if (*rn == '/')
                        dp = rn;
                else if (*rn == '.')
                        tp = rn;
        if (tp != NULL && tp > dp)
                *tp = '\0';
}


badvalue(vc)                    /* report bad variable value and exit */
int     vc;
{
        sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
        error(USER, errmsg);
}


eputs(s)                        /* put error message to stderr */
register char  *s;
{
        static int  midline = 0;

        if (!*s)
                return;
        if (!midline++) {       /* prepend line with program name */
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (s[strlen(s)-1] == '\n') {
                fflush(stderr);
                midline = 0;
        }
}


wputs(s)                        /* put warning string to stderr */
char    *s;
{
        if (!nowarn)
                eputs(s);
}


quit(ec)                        /* exit program gracefully */
int     ec;
{
        int     status = 0;

        if (hdlist[0] != NULL) {        /* close holodeck */
                if (nprocs > 0)
                        status = done_rtrace();         /* calls hdsync() */
                if (ncprocs > 0 && vdef(REPORT)) {
                        long    fsiz, fuse;
                        fsiz = hdfilen(hdlist[0]->fd);
                        fuse = hdfiluse(hdlist[0]->fd, 1);
                        fprintf(stderr,
                        "%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
                                        hdkfile, fsiz/(1024.*1024.),
                                        100.*(fsiz-fuse)/fsiz);
                }
        }
        if (orig_mode >= 0)             /* reset holodeck access mode */
                fchmod(hdlist[0]->fd, orig_mode);
        if (outdev != NULL)             /* close display */
                disp_close();
        exit(ec ? ec : status);         /* exit */
}
Revision:	3.29
Committed:	Tue Dec 16 15:45:55 1997 UTC (26 years, 4 months ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 3.28:	+54 -39 lines
Log Message:	finally enabled multiple holodeck sections
#	User	Rev	Content
1	gregl	3.1	/* Copyright (c) 1997 Silicon Graphics, Inc. */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ SGI";
5			#endif
6
7			/*
8			* Radiance holodeck generation controller
9			*/
10
11			#include "rholo.h"
12	gregl	3.14	#include "random.h"
13	gregl	3.12	#include <signal.h>
14	gregl	3.1	#include <sys/types.h>
15	gregl	3.12	#include <sys/stat.h>
16	gregl	3.1
17			/* the following must be consistent with rholo.h */
18			int NVARS = NRHVARS; /* total number of variables */
19
20			VARIABLE vv[] = RHVINIT; /* variable-value pairs */
21
22			char progname; / our program name */
23			char hdkfile; / holodeck file name */
24	gregl	3.22	char froot[256]; /* root file name */
25	gregl	3.1
26			int nowarn = 0; /* turn warnings off? */
27
28			int ncprocs = 0; /* desired number of compute processes */
29
30			char outdev = NULL; / output device name */
31
32	gregl	3.17	int readinp = 0; /* read commands from stdin */
33
34	gregl	3.20	int force = 0; /* allow overwrite of holodeck */
35
36	gregl	3.1	time_t starttime; /* time we got started */
37			time_t endtime; /* time we should end by */
38			time_t reporttime; /* time for next report */
39
40	gregl	3.8	long maxdisk; /* maximum file space (bytes) */
41
42	gregl	3.1	int rtargc = 1; /* rtrace command */
43			char *rtargv[128] = {"rtrace", NULL};
44
45	gregl	3.12	int orig_mode = -1; /* original file mode (-1 if unchanged) */
46
47	gregl	3.1	long nraysdone = 0L; /* number of rays done */
48			long npacksdone = 0L; /* number of packets done */
49
50			PACKET freepacks; / available packets */
51
52	gregl	3.12	char sigerr[NSIG]; / signal error messages */
53
54	gregl	3.1	extern time_t time();
55
56
57			main(argc, argv)
58			int argc;
59			char *argv[];
60			{
61			int i;
62	gregl	3.3	/* mark start time */
63			starttime = time(NULL);
64	gregl	3.18	initurand(16384); /* initialize urand */
65	gregl	3.1	progname = argv[0]; /* get arguments */
66			for (i = 1; i < argc && argv[i][0] == '-'; i++)
67			switch (argv[i][1]) {
68			case 'w': /* turn off warnings */
69			nowarn++;
70			break;
71			case 'f': /* force overwrite */
72			force++;
73			break;
74	gregl	3.17	case 'i': /* read input from stdin */
75			readinp++;
76			break;
77	gregl	3.1	case 'n': /* compute processes */
78			if (i >= argc-2)
79			goto userr;
80			ncprocs = atoi(argv[++i]);
81			break;
82			case 'o': /* output display */
83			if (i >= argc-2)
84			goto userr;
85			outdev = argv[++i];
86			break;
87			default:
88			goto userr;
89			}
90			/* get root file name */
91			rootname(froot, hdkfile=argv[i++]);
92	gregl	3.27	/* load variables? */
93			if (i < argc)
94			if (argv[i][0] != '-' && argv[i][0] != '+')
95			loadvars(argv[i]); /* load variables from file */
96
97			if (i >= argc \|\| argv[i][0] == '+')
98			loadholo(); /* load existing holodeck */
99
100			while (++i < argc) /* get command line settings */
101			if (setvariable(argv[i], matchvar) < 0) {
102			sprintf(errmsg, "unknown variable: %s", argv[i]);
103			error(USER, errmsg);
104			}
105			/* check settings */
106			checkvalues();
107			/* load RIF if any */
108			getradfile();
109
110	gregl	3.28	if (hdlist[0] == NULL) { /* create new holodeck */
111	gregl	3.29	HDGRID hdg[HDMAX];
112	gregl	3.1	/* set defaults */
113	gregl	3.29	setdefaults(hdg);
114	gregl	3.1	/* holodeck exists? */
115			if (!force && access(hdkfile, R_OK\|W_OK) == 0)
116			error(USER,
117			"holodeck file exists -- use -f to overwrite");
118			/* create holodeck */
119	gregl	3.29	creatholo(hdg);
120	gregl	3.27	} else /* else just set defaults */
121	gregl	3.15	setdefaults(NULL);
122	gregl	3.1	/* initialize */
123			initrholo();
124	gregl	3.15	/* main loop */
125	gregl	3.1	while (rholo())
126			;
127			/* done */
128			quit(0);
129			userr:
130			fprintf(stderr,
131	gregl	3.27	"Usage: %s [-n nprocs][-o disp][-w][-f] output.hdk [control.hif\|+\|- [VAR=val ..]]\n",
132	gregl	3.1	progname);
133			quit(1);
134			}
135
136
137	gregl	3.12	onsig(signo) /* fatal signal */
138			int signo;
139			{
140			static int gotsig = 0;
141
142			if (gotsig++) /* two signals and we're gone! */
143			_exit(signo);
144
145	gregl	3.28	alarm(60); /* allow 60 seconds to clean up */
146	gregl	3.12	signal(SIGALRM, SIG_DFL); /* make certain we do die */
147			eputs("signal - ");
148			eputs(sigerr[signo]);
149			eputs("\n");
150			quit(3);
151			}
152
153
154			sigdie(signo, msg) /* set fatal signal */
155			int signo;
156			char *msg;
157			{
158			if (signal(signo, onsig) == SIG_IGN)
159			signal(signo, SIG_IGN);
160			sigerr[signo] = msg;
161			}
162
163
164			int
165			resfmode(fd, mod) /* restrict open file access mode */
166			int fd, mod;
167			{
168			struct stat stbuf;
169			/* get original mode */
170			if (fstat(fd, &stbuf) < 0)
171			error(SYSTEM, "cannot stat open holodeck file");
172			mod &= stbuf.st_mode; /* always more restrictive */
173			if (mod == stbuf.st_mode)
174			return(-1); /* already set */
175			/* else change it */
176			if (fchmod(fd, mod) < 0) {
177			error(WARNING, "cannot change holodeck file access mode");
178			return(-1);
179			}
180			return(stbuf.st_mode); /* return original mode */
181			}
182
183
184	gregl	3.1	initrholo() /* get our holodeck running */
185			{
186			extern int global_packet();
187			register int i;
188	gregl	3.17	/* close holodeck on exec() */
189			fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);
190	gregl	3.4
191			if (outdev != NULL) /* open output device */
192			disp_open(outdev);
193	gregl	3.1	else if (ncprocs > 0) /* else use global ray feed */
194			init_global();
195	gregl	3.8	/* record disk space limit */
196			if (!vdef(DISKSPACE))
197			maxdisk = 0;
198			else
199	gregl	3.9	maxdisk = 1024.1024.vflt(DISKSPACE);
200	gregl	3.3	/* record end time */
201	gregl	3.1	if (!vdef(TIME) \|\| vflt(TIME) <= FTINY)
202			endtime = 0;
203			else
204	gregl	3.23	endtime = starttime + vflt(TIME)*3600. + .5;
205	gregl	3.1	/* set up memory cache */
206	gregl	3.5	if (outdev == NULL)
207			hdcachesize = 0; /* manual flushing */
208			else if (vdef(CACHE))
209			hdcachesize = 1024.1024.vflt(CACHE);
210	gregl	3.1	/* open report file */
211			if (vdef(REPORT)) {
212			register char *s = sskip2(vval(REPORT), 1);
213			if (*s && freopen(s, "a", stderr) == NULL)
214			quit(2);
215			}
216			/* start rtrace */
217			if (ncprocs > 0) {
218			i = start_rtrace();
219			if (i < 1)
220	gregl	3.20	error(USER, "cannot start rtrace process(es)");
221	gregl	3.1	if (vdef(REPORT)) { /* make first report */
222			printargs(rtargc, rtargv, stderr);
223			report(0);
224			}
225			/* allocate packets */
226			freepacks = (PACKET )bmalloc(isizeof(PACKET));
227			if (freepacks == NULL)
228			goto memerr;
229			freepacks[--i].nr = 0;
230			freepacks[i].next = NULL;
231	gregl	3.25	if (!vdef(OBSTRUCTIONS) \|\| !vbool(OBSTRUCTIONS)) {
232	gregl	3.1	freepacks[i].offset = (float *)bmalloc(
233			RPACKSIZsizeof(float)(i+1) );
234			if (freepacks[i].offset == NULL)
235			goto memerr;
236			} else
237			freepacks[i].offset = NULL;
238			while (i--) {
239			freepacks[i].nr = 0;
240			freepacks[i].offset = freepacks[i+1].offset == NULL ?
241			NULL : freepacks[i+1].offset+RPACKSIZ ;
242			freepacks[i].next = &freepacks[i+1];
243			}
244			}
245	gregl	3.12	/* set up signal handling */
246			sigdie(SIGINT, "Interrupt");
247			sigdie(SIGHUP, "Hangup");
248			sigdie(SIGTERM, "Terminate");
249			sigdie(SIGPIPE, "Broken pipe");
250			sigdie(SIGALRM, "Alarm clock");
251			#ifdef SIGXCPU
252			sigdie(SIGXCPU, "CPU limit exceeded");
253			sigdie(SIGXFSZ, "File size exceeded");
254			#endif
255			/* protect holodeck file */
256			orig_mode = resfmode(hdlist[0]->fd, ncprocs>0 ? 0 : 0444);
257	gregl	3.1	return;
258			memerr:
259			error(SYSTEM, "out of memory in initrholo");
260			}
261
262
263			rholo() /* holodeck main loop */
264			{
265			static int idle = 1;
266			PACKET pl = NULL, plend;
267			register PACKET *p;
268			time_t t;
269			long l;
270	gregl	3.4
271			if (outdev != NULL) /* check display */
272			if (!disp_check(idle))
273			return(0);
274	gregl	3.1	/* display only? */
275	gregl	3.28	if (nprocs <= 0) {
276			idle = 1;
277	gregl	3.21	return(outdev != NULL);
278	gregl	3.28	}
279	gregl	3.1	/* check file size */
280	gregl	3.9	if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
281	gregl	3.8	error(WARNING, "file limit exceeded");
282	gregl	3.21	done_rtrace();
283			return(1); /* comes back */
284	gregl	3.8	}
285	gregl	3.1	/* check time */
286	gregl	3.3	if (endtime > 0 \|\| reporttime > 0)
287	gregl	3.1	t = time(NULL);
288	gregl	3.8	if (endtime > 0 && t >= endtime) {
289			error(WARNING, "time limit exceeded");
290	gregl	3.21	done_rtrace();
291			return(1); /* comes back */
292	gregl	3.8	}
293	gregl	3.3	if (reporttime > 0 && t >= reporttime)
294	gregl	3.1	report(t);
295	gregl	3.28	idle = 0; /* get packets to process */
296	gregl	3.1	while (freepacks != NULL) {
297			p = freepacks; freepacks = p->next; p->next = NULL;
298			if (!next_packet(p)) {
299			p->next = freepacks; freepacks = p;
300	gregl	3.21	idle = 1;
301	gregl	3.1	break;
302			}
303			if (pl == NULL) pl = p;
304			else plend->next = p;
305			plend = p;
306			}
307	gregl	3.21	/* process packets */
308	gregl	3.1	done_packets(do_packets(pl));
309			return(1); /* and continue */
310			}
311
312
313			setdefaults(gp) /* set default values */
314			register HDGRID *gp;
315			{
316			extern char *atos();
317			register int i;
318	gregl	3.29	int n;
319	gregl	3.1	double len[3], maxlen, d;
320			char buf[64];
321
322			if (!vdef(SECTION)) {
323			sprintf(errmsg, "%s must be defined", vnam(SECTION));
324			error(USER, errmsg);
325			}
326			if (!vdef(OCTREE)) {
327			if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
328			error(SYSTEM, "out of memory");
329			sprintf(vval(OCTREE), "%s.oct", froot);
330			vdef(OCTREE)++;
331	gregl	3.14	}
332			if (!vdef(VDIST)) {
333			vval(VDIST) = "F";
334			vdef(VDIST)++;
335	gregl	3.1	}
336			/* append rendering options */
337			if (vdef(RENDER))
338			rtargc += wordstring(rtargv+rtargc, vval(RENDER));
339	gregl	3.15
340			if (gp == NULL) /* already initialized? */
341			return;
342			/* set grid parameters */
343	gregl	3.29	for (n = 0; n < vdef(SECTION); n++, gp++) {
344			gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
345			if (sscanf(nvalue(SECTION, n),
346	gregl	3.16	"%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
347	gregl	3.29	&gp->orig[0], &gp->orig[1], &gp->orig[2],
348			&gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
349			&gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
350			&gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2],
351			&gp->grid[0], &gp->grid[1], &gp->grid[2]) < 12)
352			badvalue(SECTION);
353			maxlen = 0.;
354			for (i = 0; i < 3; i++)
355			if ((len[i] = VLEN(gp->xv[i])) > maxlen)
356			maxlen = len[i];
357			if (!vdef(GRID))
358			d = 0.125*maxlen;
359			else if ((d = vflt(GRID)) <= FTINY)
360			badvalue(GRID);
361			for (i = 0; i < 3; i++)
362			if (gp->grid[i] <= 0)
363			gp->grid[i] = len[i]/d + (1.-FTINY);
364	gregl	3.15	}
365	gregl	3.1	}
366
367
368			creatholo(gp) /* create a holodeck output file */
369			HDGRID *gp;
370			{
371	gregl	3.12	extern char VersionID[];
372	gregl	3.29	int4 lastloc, nextloc;
373			int n;
374	gregl	3.10	int fd;
375	gregl	3.1	FILE *fp;
376			/* open & truncate file */
377			if ((fp = fopen(hdkfile, "w+")) == NULL) {
378			sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
379			error(SYSTEM, errmsg);
380			}
381			/* write information header */
382			newheader("RADIANCE", fp);
383	gregl	3.12	fprintf(fp, "SOFTWARE= %s\n", VersionID);
384	gregl	3.1	printvars(fp);
385			fputformat(HOLOFMT, fp);
386			fputc('\n', fp);
387	gregl	3.29	putw(HOLOMAGIC, fp); /* put magic number */
388	gregl	3.10	fd = dup(fileno(fp));
389			fclose(fp); /* flush and close stdio stream */
390	gregl	3.29	lastloc = lseek(fd, 0L, 2);
391			for (n = vdef(SECTION); n--; gp++) { /* initialize each section */
392			nextloc = 0L;
393			write(fd, (char *)&nextloc, sizeof(nextloc));
394			hdinit(fd, gp); /* writes beam index */
395			if (!n)
396			break;
397			nextloc = hdfilen(fd); /* write section pointer */
398			if (lseek(fd, (long)lastloc, 0) < 0)
399			error(SYSTEM,
400			"cannot seek on holodeck file in creatholo");
401			write(fd, (char *)&nextloc, sizeof(nextloc));
402			lseek(fd, (long)(lastloc=nextloc), 0);
403			}
404	gregl	3.1	}
405
406
407			headline(s) /* process information header line */
408			char *s;
409			{
410			extern char FMTSTR[];
411			register char *cp;
412			char fmt[32];
413
414	gregl	3.2	if (formatval(fmt, s)) {
415	gregl	3.1	if (strcmp(fmt, HOLOFMT)) {
416			sprintf(errmsg, "%s file \"%s\" has %s%s",
417			HOLOFMT, hdkfile, FMTSTR, fmt);
418			error(USER, errmsg);
419			}
420			return;
421			}
422			for (cp = s; cp; cp++) / take off any comments */
423			if (*cp == '#') {
424			*cp = '\0';
425			break;
426			}
427			setvariable(s, matchvar); /* don't flag errors */
428			}
429
430
431			loadholo() /* start loading a holodeck from fname */
432			{
433	gregl	3.10	extern long ftell();
434	gregl	3.1	FILE *fp;
435	gregl	3.10	int fd;
436	gregl	3.29	int n;
437			int4 nextloc;
438	gregl	3.4	/* open holodeck file */
439			if ((fp = fopen(hdkfile, ncprocs>0 ? "r+" : "r")) == NULL) {
440			sprintf(errmsg, "cannot open \"%s\" for %s", hdkfile,
441			ncprocs>0 ? "appending" : "reading");
442	gregl	3.1	error(SYSTEM, errmsg);
443			}
444			/* load variables from header */
445			getheader(fp, headline, NULL);
446			/* check magic number */
447			if (getw(fp) != HOLOMAGIC) {
448			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
449			hdkfile);
450			error(USER, errmsg);
451			}
452	gregl	3.29	nextloc = ftell(fp); /* get stdio position */
453	gregl	3.10	fd = dup(fileno(fp));
454			fclose(fp); /* done with stdio */
455	gregl	3.29	for (n = 0; nextloc > 0L; n++) { /* initialize each section */
456			lseek(fd, (long)nextloc, 0);
457			read(fd, (char *)&nextloc, sizeof(nextloc));
458			hdinit(fd, NULL);
459			}
460			if (n != vdef(SECTION)) {
461			sprintf(errmsg, "number of sections does not match %s setting",
462			vnam(SECTION));
463			error(WARNING, errmsg);
464			}
465	gregl	3.1	}
466
467
468			done_packets(pl) /* handle finished packets */
469			PACKET *pl;
470			{
471	gregl	3.13	static int n2flush = 0;
472	gregl	3.1	register PACKET *p;
473
474			while (pl != NULL) {
475			p = pl; pl = p->next; p->next = NULL;
476			if (p->nr > 0) { /* add to holodeck */
477			bcopy((char *)p->ra,
478			(char *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
479			p->nr*sizeof(RAYVAL));
480			if (outdev != NULL) /* display it */
481	gregl	3.7	disp_packet((PACKHEAD *)p);
482	gregl	3.13	if (hdcachesize <= 0) /* manual flushing */
483			n2flush += p->nr;
484	gregl	3.6	nraysdone += p->nr;
485			npacksdone++;
486	gregl	3.1	}
487			p->nr = 0; /* push onto free list */
488			p->next = freepacks;
489			freepacks = p;
490	gregl	3.5	}
491	gregl	3.19	if (n2flush > 512RPACKSIZnprocs) {
492	gregl	3.5	hdflush(NULL); /* flush holodeck buffers */
493	gregl	3.13	n2flush = 0;
494	gregl	3.1	}
495			}
496
497
498			rootname(rn, fn) /* remove tail from end of fn */
499			register char rn, fn;
500			{
501			char tp, dp;
502
503			for (tp = NULL, dp = rn; rn = fn++; rn++)
504	gregl	3.22	if (*rn == '/')
505	gregl	3.1	dp = rn;
506			else if (*rn == '.')
507			tp = rn;
508			if (tp != NULL && tp > dp)
509			*tp = '\0';
510			}
511
512
513			badvalue(vc) /* report bad variable value and exit */
514			int vc;
515			{
516			sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
517			error(USER, errmsg);
518			}
519
520
521			eputs(s) /* put error message to stderr */
522			register char *s;
523			{
524			static int midline = 0;
525
526			if (!*s)
527			return;
528			if (!midline++) { /* prepend line with program name */
529			fputs(progname, stderr);
530			fputs(": ", stderr);
531			}
532			fputs(s, stderr);
533			if (s[strlen(s)-1] == '\n') {
534			fflush(stderr);
535			midline = 0;
536			}
537			}
538
539
540			wputs(s) /* put warning string to stderr */
541			char *s;
542			{
543			if (!nowarn)
544			eputs(s);
545			}
546
547
548			quit(ec) /* exit program gracefully */
549			int ec;
550			{
551			int status = 0;
552
553	gregl	3.24	if (hdlist[0] != NULL) { /* close holodeck */
554	gregl	3.21	if (nprocs > 0)
555	gregl	3.24	status = done_rtrace(); /* calls hdsync() */
556	gregl	3.19	if (ncprocs > 0 && vdef(REPORT)) {
557			long fsiz, fuse;
558			fsiz = hdfilen(hdlist[0]->fd);
559			fuse = hdfiluse(hdlist[0]->fd, 1);
560			fprintf(stderr,
561	gregl	3.3	"%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
562	gregl	3.19	hdkfile, fsiz/(1024.*1024.),
563			100.*(fsiz-fuse)/fsiz);
564			}
565	gregl	3.1	}
566	gregl	3.12	if (orig_mode >= 0) /* reset holodeck access mode */
567			fchmod(hdlist[0]->fd, orig_mode);
568	gregl	3.11	if (outdev != NULL) /* close display */
569			disp_close();
570	gregl	3.1	exit(ec ? ec : status); /* exit */
571			}