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[];
{
        HDGRID  hdg;
        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... */
        if (i < argc) {                         /* variables */
                loadvars(argv[i++]);
                                                        /* cmdline settings */
                for ( ; i < argc; i++)
                        if (setvariable(argv[i], matchvar) < 0) {
                                sprintf(errmsg, "unknown variable: %s",
                                                argv[i]);
                                error(USER, errmsg);
                        }
                                                        /* check settings */
                checkvalues();
                                                        /* load RIF if any */
                getradfile();
                                                        /* 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 load holodeck */
                loadholo();
                                                        /* check settings */
                checkvalues();
                                                        /* load RIF if any */
                getradfile();
                                                        /* 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(30);                      /* allow 30 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)
                return(outdev != NULL);
                                        /* check file size */
        if (maxdisk > 0 && hdfilen(hdlist[0]->fd) >= maxdisk) {
                error(WARNING, "file limit exceeded");
                done_rtrace();
                idle = 1;
                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();
                idle = 1;
                return(1);      /* comes back */
        }
        if (reporttime > 0 && t >= reporttime)
                report(t);
                                        /* 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;
        double  len[3], maxlen, d;
        char    buf[64];

        if (!vdef(SECTION)) {
                sprintf(errmsg, "%s must be defined", vnam(SECTION));
                error(USER, errmsg);
        }
        if (vdef(SECTION) > 1) {
                sprintf(errmsg, "ignoring all but first %s", vnam(SECTION));
                error(WARNING, 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)++;
        }
        if (!vdef(OCCUPANCY)) {
                vval(OCCUPANCY) = "U";
                vdef(OCCUPANCY)++;
        }
                                /* append rendering options */
        if (vdef(RENDER))
                rtargc += wordstring(rtargv+rtargc, vval(RENDER));
        
        if (gp == NULL)         /* already initialized? */
                return;
                                /* set grid parameters */
        gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
        if (sscanf(vval(SECTION),
                "%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)) {
                sprintf(buf, "%.4f", maxlen/8.);
                vval(GRID) = savqstr(buf);
                vdef(GRID)++;
        }
        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[];
        long    endloc = 0;
        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 & terminus */
        fwrite(&endloc, sizeof(long), 1, fp);
        fd = dup(fileno(fp));
        fclose(fp);                     /* flush and close stdio stream */
        hdinit(fd, gp);                 /* allocate and initialize index */
}


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;
        long    fpos;
                                        /* 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);
        }
        fread(&fpos, sizeof(long), 1, fp);
        if (fpos != 0)
                error(WARNING, "ignoring multiple sections in holodeck file");
        fpos = ftell(fp);                       /* get stdio position */
        fd = dup(fileno(fp));
        fclose(fp);                             /* done with stdio */
        lseek(fd, fpos, 0);                     /* align system file pointer */
        hdinit(fd, NULL);                       /* allocate and load index */
}


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:	3.26
Committed:	Sat Dec 13 10:38:26 1997 UTC (26 years, 4 months ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 3.25:	+1 -4 lines
Log Message:	allow rholo to create a holodeck even if there is nothing to do
#	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			HDGRID hdg;
62			int i;
63	gregl	3.3	/* mark start time */
64			starttime = time(NULL);
65	gregl	3.18	initurand(16384); /* initialize urand */
66	gregl	3.1	progname = argv[0]; /* get arguments */
67			for (i = 1; i < argc && argv[i][0] == '-'; i++)
68			switch (argv[i][1]) {
69			case 'w': /* turn off warnings */
70			nowarn++;
71			break;
72			case 'f': /* force overwrite */
73			force++;
74			break;
75	gregl	3.17	case 'i': /* read input from stdin */
76			readinp++;
77			break;
78	gregl	3.1	case 'n': /* compute processes */
79			if (i >= argc-2)
80			goto userr;
81			ncprocs = atoi(argv[++i]);
82			break;
83			case 'o': /* output display */
84			if (i >= argc-2)
85			goto userr;
86			outdev = argv[++i];
87			break;
88			default:
89			goto userr;
90			}
91			/* get root file name */
92			rootname(froot, hdkfile=argv[i++]);
93			/* load... */
94			if (i < argc) { /* variables */
95			loadvars(argv[i++]);
96			/* cmdline settings */
97			for ( ; i < argc; i++)
98			if (setvariable(argv[i], matchvar) < 0) {
99			sprintf(errmsg, "unknown variable: %s",
100			argv[i]);
101			error(USER, errmsg);
102			}
103			/* check settings */
104			checkvalues();
105			/* load RIF if any */
106	gregl	3.22	getradfile();
107	gregl	3.1	/* set defaults */
108			setdefaults(&hdg);
109			/* holodeck exists? */
110			if (!force && access(hdkfile, R_OK\|W_OK) == 0)
111			error(USER,
112			"holodeck file exists -- use -f to overwrite");
113			/* create holodeck */
114			creatholo(&hdg);
115	gregl	3.3	} else { /* else load holodeck */
116	gregl	3.1	loadholo();
117	gregl	3.15	/* check settings */
118			checkvalues();
119			/* load RIF if any */
120	gregl	3.22	getradfile();
121	gregl	3.15	/* set defaults */
122			setdefaults(NULL);
123	gregl	3.3	}
124	gregl	3.1	/* initialize */
125			initrholo();
126	gregl	3.15	/* main loop */
127	gregl	3.1	while (rholo())
128			;
129			/* done */
130			quit(0);
131			userr:
132			fprintf(stderr,
133	gregl	3.26	"Usage: %s [-n nprocs][-o disp][-w][-f] output.hdk [control.hif [VAR=val ..]]\n",
134	gregl	3.1	progname);
135			quit(1);
136			}
137
138
139	gregl	3.12	onsig(signo) /* fatal signal */
140			int signo;
141			{
142			static int gotsig = 0;
143
144			if (gotsig++) /* two signals and we're gone! */
145			_exit(signo);
146
147			alarm(30); /* allow 30 seconds to clean up */
148			signal(SIGALRM, SIG_DFL); /* make certain we do die */
149			eputs("signal - ");
150			eputs(sigerr[signo]);
151			eputs("\n");
152			quit(3);
153			}
154
155
156			sigdie(signo, msg) /* set fatal signal */
157			int signo;
158			char *msg;
159			{
160			if (signal(signo, onsig) == SIG_IGN)
161			signal(signo, SIG_IGN);
162			sigerr[signo] = msg;
163			}
164
165
166			int
167			resfmode(fd, mod) /* restrict open file access mode */
168			int fd, mod;
169			{
170			struct stat stbuf;
171			/* get original mode */
172			if (fstat(fd, &stbuf) < 0)
173			error(SYSTEM, "cannot stat open holodeck file");
174			mod &= stbuf.st_mode; /* always more restrictive */
175			if (mod == stbuf.st_mode)
176			return(-1); /* already set */
177			/* else change it */
178			if (fchmod(fd, mod) < 0) {
179			error(WARNING, "cannot change holodeck file access mode");
180			return(-1);
181			}
182			return(stbuf.st_mode); /* return original mode */
183			}
184
185
186	gregl	3.1	initrholo() /* get our holodeck running */
187			{
188			extern int global_packet();
189			register int i;
190	gregl	3.17	/* close holodeck on exec() */
191			fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);
192	gregl	3.4
193			if (outdev != NULL) /* open output device */
194			disp_open(outdev);
195	gregl	3.1	else if (ncprocs > 0) /* else use global ray feed */
196			init_global();
197	gregl	3.8	/* record disk space limit */
198			if (!vdef(DISKSPACE))
199			maxdisk = 0;
200			else
201	gregl	3.9	maxdisk = 1024.1024.vflt(DISKSPACE);
202	gregl	3.3	/* record end time */
203	gregl	3.1	if (!vdef(TIME) \|\| vflt(TIME) <= FTINY)
204			endtime = 0;
205			else
206	gregl	3.23	endtime = starttime + vflt(TIME)*3600. + .5;
207	gregl	3.1	/* set up memory cache */
208	gregl	3.5	if (outdev == NULL)
209			hdcachesize = 0; /* manual flushing */
210			else if (vdef(CACHE))
211			hdcachesize = 1024.1024.vflt(CACHE);
212	gregl	3.1	/* open report file */
213			if (vdef(REPORT)) {
214			register char *s = sskip2(vval(REPORT), 1);
215			if (*s && freopen(s, "a", stderr) == NULL)
216			quit(2);
217			}
218			/* start rtrace */
219			if (ncprocs > 0) {
220			i = start_rtrace();
221			if (i < 1)
222	gregl	3.20	error(USER, "cannot start rtrace process(es)");
223	gregl	3.1	if (vdef(REPORT)) { /* make first report */
224			printargs(rtargc, rtargv, stderr);
225			report(0);
226			}
227			/* allocate packets */
228			freepacks = (PACKET )bmalloc(isizeof(PACKET));
229			if (freepacks == NULL)
230			goto memerr;
231			freepacks[--i].nr = 0;
232			freepacks[i].next = NULL;
233	gregl	3.25	if (!vdef(OBSTRUCTIONS) \|\| !vbool(OBSTRUCTIONS)) {
234	gregl	3.1	freepacks[i].offset = (float *)bmalloc(
235			RPACKSIZsizeof(float)(i+1) );
236			if (freepacks[i].offset == NULL)
237			goto memerr;
238			} else
239			freepacks[i].offset = NULL;
240			while (i--) {
241			freepacks[i].nr = 0;
242			freepacks[i].offset = freepacks[i+1].offset == NULL ?
243			NULL : freepacks[i+1].offset+RPACKSIZ ;
244			freepacks[i].next = &freepacks[i+1];
245			}
246			}
247	gregl	3.12	/* set up signal handling */
248			sigdie(SIGINT, "Interrupt");
249			sigdie(SIGHUP, "Hangup");
250			sigdie(SIGTERM, "Terminate");
251			sigdie(SIGPIPE, "Broken pipe");
252			sigdie(SIGALRM, "Alarm clock");
253			#ifdef SIGXCPU
254			sigdie(SIGXCPU, "CPU limit exceeded");
255			sigdie(SIGXFSZ, "File size exceeded");
256			#endif
257			/* protect holodeck file */
258			orig_mode = resfmode(hdlist[0]->fd, ncprocs>0 ? 0 : 0444);
259	gregl	3.1	return;
260			memerr:
261			error(SYSTEM, "out of memory in initrholo");
262			}
263
264
265			rholo() /* holodeck main loop */
266			{
267			static int idle = 1;
268			PACKET pl = NULL, plend;
269			register PACKET *p;
270			time_t t;
271			long l;
272	gregl	3.4
273			if (outdev != NULL) /* check display */
274			if (!disp_check(idle))
275			return(0);
276	gregl	3.1	/* display only? */
277	gregl	3.19	if (nprocs <= 0)
278	gregl	3.21	return(outdev != NULL);
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			idle = 1;
284			return(1); /* comes back */
285	gregl	3.8	}
286	gregl	3.1	/* check time */
287	gregl	3.3	if (endtime > 0 \|\| reporttime > 0)
288	gregl	3.1	t = time(NULL);
289	gregl	3.8	if (endtime > 0 && t >= endtime) {
290			error(WARNING, "time limit exceeded");
291	gregl	3.21	done_rtrace();
292			idle = 1;
293			return(1); /* comes back */
294	gregl	3.8	}
295	gregl	3.3	if (reporttime > 0 && t >= reporttime)
296	gregl	3.1	report(t);
297			/* get packets to process */
298			while (freepacks != NULL) {
299			p = freepacks; freepacks = p->next; p->next = NULL;
300			if (!next_packet(p)) {
301			p->next = freepacks; freepacks = p;
302	gregl	3.21	idle = 1;
303	gregl	3.1	break;
304			}
305			if (pl == NULL) pl = p;
306			else plend->next = p;
307			plend = p;
308			}
309	gregl	3.21	/* process packets */
310	gregl	3.1	done_packets(do_packets(pl));
311			return(1); /* and continue */
312			}
313
314
315			setdefaults(gp) /* set default values */
316			register HDGRID *gp;
317			{
318			extern char *atos();
319			register int i;
320			double len[3], maxlen, d;
321			char buf[64];
322
323			if (!vdef(SECTION)) {
324			sprintf(errmsg, "%s must be defined", vnam(SECTION));
325			error(USER, errmsg);
326			}
327			if (vdef(SECTION) > 1) {
328			sprintf(errmsg, "ignoring all but first %s", vnam(SECTION));
329			error(WARNING, errmsg);
330			}
331			if (!vdef(OCTREE)) {
332			if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
333			error(SYSTEM, "out of memory");
334			sprintf(vval(OCTREE), "%s.oct", froot);
335			vdef(OCTREE)++;
336	gregl	3.14	}
337			if (!vdef(VDIST)) {
338			vval(VDIST) = "F";
339			vdef(VDIST)++;
340	gregl	3.1	}
341			if (!vdef(OCCUPANCY)) {
342			vval(OCCUPANCY) = "U";
343			vdef(OCCUPANCY)++;
344			}
345			/* append rendering options */
346			if (vdef(RENDER))
347			rtargc += wordstring(rtargv+rtargc, vval(RENDER));
348	gregl	3.15
349			if (gp == NULL) /* already initialized? */
350			return;
351			/* set grid parameters */
352	gregl	3.16	gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
353	gregl	3.15	if (sscanf(vval(SECTION),
354	gregl	3.16	"%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
355	gregl	3.15	&gp->orig[0], &gp->orig[1], &gp->orig[2],
356			&gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
357			&gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
358	gregl	3.16	&gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2],
359			&gp->grid[0], &gp->grid[1], &gp->grid[2]) < 12)
360	gregl	3.15	badvalue(SECTION);
361			maxlen = 0.;
362			for (i = 0; i < 3; i++)
363			if ((len[i] = VLEN(gp->xv[i])) > maxlen)
364			maxlen = len[i];
365			if (!vdef(GRID)) {
366			sprintf(buf, "%.4f", maxlen/8.);
367			vval(GRID) = savqstr(buf);
368			vdef(GRID)++;
369			}
370			if ((d = vflt(GRID)) <= FTINY)
371			badvalue(GRID);
372			for (i = 0; i < 3; i++)
373	gregl	3.16	if (gp->grid[i] <= 0)
374			gp->grid[i] = len[i]/d + (1.-FTINY);
375	gregl	3.1	}
376
377
378			creatholo(gp) /* create a holodeck output file */
379			HDGRID *gp;
380			{
381	gregl	3.12	extern char VersionID[];
382	gregl	3.1	long endloc = 0;
383	gregl	3.10	int fd;
384	gregl	3.1	FILE *fp;
385			/* open & truncate file */
386			if ((fp = fopen(hdkfile, "w+")) == NULL) {
387			sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
388			error(SYSTEM, errmsg);
389			}
390			/* write information header */
391			newheader("RADIANCE", fp);
392	gregl	3.12	fprintf(fp, "SOFTWARE= %s\n", VersionID);
393	gregl	3.1	printvars(fp);
394			fputformat(HOLOFMT, fp);
395			fputc('\n', fp);
396			putw(HOLOMAGIC, fp); /* put magic number & terminus */
397			fwrite(&endloc, sizeof(long), 1, fp);
398	gregl	3.10	fd = dup(fileno(fp));
399			fclose(fp); /* flush and close stdio stream */
400			hdinit(fd, gp); /* allocate and initialize index */
401	gregl	3.1	}
402
403
404			headline(s) /* process information header line */
405			char *s;
406			{
407			extern char FMTSTR[];
408			register char *cp;
409			char fmt[32];
410
411	gregl	3.2	if (formatval(fmt, s)) {
412	gregl	3.1	if (strcmp(fmt, HOLOFMT)) {
413			sprintf(errmsg, "%s file \"%s\" has %s%s",
414			HOLOFMT, hdkfile, FMTSTR, fmt);
415			error(USER, errmsg);
416			}
417			return;
418			}
419			for (cp = s; cp; cp++) / take off any comments */
420			if (*cp == '#') {
421			*cp = '\0';
422			break;
423			}
424			setvariable(s, matchvar); /* don't flag errors */
425			}
426
427
428			loadholo() /* start loading a holodeck from fname */
429			{
430	gregl	3.10	extern long ftell();
431	gregl	3.1	FILE *fp;
432	gregl	3.10	int fd;
433			long fpos;
434	gregl	3.4	/* open holodeck file */
435			if ((fp = fopen(hdkfile, ncprocs>0 ? "r+" : "r")) == NULL) {
436			sprintf(errmsg, "cannot open \"%s\" for %s", hdkfile,
437			ncprocs>0 ? "appending" : "reading");
438	gregl	3.1	error(SYSTEM, errmsg);
439			}
440			/* load variables from header */
441			getheader(fp, headline, NULL);
442			/* check magic number */
443			if (getw(fp) != HOLOMAGIC) {
444			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
445			hdkfile);
446			error(USER, errmsg);
447			}
448	gregl	3.10	fread(&fpos, sizeof(long), 1, fp);
449			if (fpos != 0)
450	gregl	3.1	error(WARNING, "ignoring multiple sections in holodeck file");
451	gregl	3.10	fpos = ftell(fp); /* get stdio position */
452			fd = dup(fileno(fp));
453			fclose(fp); /* done with stdio */
454			lseek(fd, fpos, 0); /* align system file pointer */
455			hdinit(fd, NULL); /* allocate and load index */
456	gregl	3.1	}
457
458
459			done_packets(pl) /* handle finished packets */
460			PACKET *pl;
461			{
462	gregl	3.13	static int n2flush = 0;
463	gregl	3.1	register PACKET *p;
464
465			while (pl != NULL) {
466			p = pl; pl = p->next; p->next = NULL;
467			if (p->nr > 0) { /* add to holodeck */
468			bcopy((char *)p->ra,
469			(char *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
470			p->nr*sizeof(RAYVAL));
471			if (outdev != NULL) /* display it */
472	gregl	3.7	disp_packet((PACKHEAD *)p);
473	gregl	3.13	if (hdcachesize <= 0) /* manual flushing */
474			n2flush += p->nr;
475	gregl	3.6	nraysdone += p->nr;
476			npacksdone++;
477	gregl	3.1	}
478			p->nr = 0; /* push onto free list */
479			p->next = freepacks;
480			freepacks = p;
481	gregl	3.5	}
482	gregl	3.19	if (n2flush > 512RPACKSIZnprocs) {
483	gregl	3.5	hdflush(NULL); /* flush holodeck buffers */
484	gregl	3.13	n2flush = 0;
485	gregl	3.1	}
486			}
487
488
489			rootname(rn, fn) /* remove tail from end of fn */
490			register char rn, fn;
491			{
492			char tp, dp;
493
494			for (tp = NULL, dp = rn; rn = fn++; rn++)
495	gregl	3.22	if (*rn == '/')
496	gregl	3.1	dp = rn;
497			else if (*rn == '.')
498			tp = rn;
499			if (tp != NULL && tp > dp)
500			*tp = '\0';
501			}
502
503
504			badvalue(vc) /* report bad variable value and exit */
505			int vc;
506			{
507			sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
508			error(USER, errmsg);
509			}
510
511
512			eputs(s) /* put error message to stderr */
513			register char *s;
514			{
515			static int midline = 0;
516
517			if (!*s)
518			return;
519			if (!midline++) { /* prepend line with program name */
520			fputs(progname, stderr);
521			fputs(": ", stderr);
522			}
523			fputs(s, stderr);
524			if (s[strlen(s)-1] == '\n') {
525			fflush(stderr);
526			midline = 0;
527			}
528			}
529
530
531			wputs(s) /* put warning string to stderr */
532			char *s;
533			{
534			if (!nowarn)
535			eputs(s);
536			}
537
538
539			quit(ec) /* exit program gracefully */
540			int ec;
541			{
542			int status = 0;
543
544	gregl	3.24	if (hdlist[0] != NULL) { /* close holodeck */
545	gregl	3.21	if (nprocs > 0)
546	gregl	3.24	status = done_rtrace(); /* calls hdsync() */
547	gregl	3.19	if (ncprocs > 0 && vdef(REPORT)) {
548			long fsiz, fuse;
549			fsiz = hdfilen(hdlist[0]->fd);
550			fuse = hdfiluse(hdlist[0]->fd, 1);
551			fprintf(stderr,
552	gregl	3.3	"%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
553	gregl	3.19	hdkfile, fsiz/(1024.*1024.),
554			100.*(fsiz-fuse)/fsiz);
555			}
556	gregl	3.1	}
557	gregl	3.12	if (orig_mode >= 0) /* reset holodeck access mode */
558			fchmod(hdlist[0]->fd, orig_mode);
559	gregl	3.11	if (outdev != NULL) /* close display */
560			disp_close();
561	gregl	3.1	exit(ec ? ec : status); /* exit */
562			}