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#ifndef lint |
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static const char RCSid[] = "$Id: rhoptimize.c,v 3.11 2003/06/13 15:27:04 greg Exp $"; |
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#endif |
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/* |
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* Optimize holodeck for quick access. |
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* |
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* 11/4/98 Greg Ward Larson |
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*/ |
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|
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#include <signal.h> |
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#include <string.h> |
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#ifdef _WIN32 |
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#include <process.h> /* getpid() */ |
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#endif |
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|
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#include "holo.h" |
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|
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#ifndef BKBSIZE |
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#define BKBSIZE 256 /* beam clump size (kilobytes) */ |
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#endif |
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|
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char *progname; |
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char tempfile[128]; |
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int dupchecking = 0; |
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|
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extern long rhinitcopy(); |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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char *inpname, *outname; |
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int hdfd[2]; |
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long nextipos, lastopos, thisopos; |
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|
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progname = argv[0]; |
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argv++; argc--; /* duplicate checking flag? */ |
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if (argc > 1 && !strcmp(argv[0], "-u")) { |
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dupchecking++; |
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argv++; argc--; |
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} |
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if (argc < 1 | argc > 2) { |
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fprintf(stderr, "Usage: %s [-u] input.hdk [output.hdk]\n", |
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progname); |
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exit(1); |
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} |
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inpname = argv[0]; /* get input file */ |
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argv++; argc--; |
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if (argc == 1) /* use given output file */ |
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outname = argv[0]; |
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else { /* else use temporary file */ |
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if (access(inpname, R_OK|W_OK) < 0) { /* check permissions */ |
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sprintf(errmsg, "cannot access \"%s\"", inpname); |
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error(SYSTEM, errmsg); |
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} |
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strcpy(tempfile, inpname); |
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if ((outname = strrchr(tempfile, '/')) != NULL) |
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outname++; |
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else |
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outname = tempfile; |
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sprintf(outname, "rho%d.hdk", getpid()); |
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outname = tempfile; |
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} |
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/* copy holodeck file header */ |
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nextipos = rhinitcopy(hdfd, inpname, outname); |
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lastopos = 0L; /* copy sections one by one */ |
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while (nextipos != 0L) { |
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/* set input position; get next */ |
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lseek(hdfd[0], (off_t)nextipos, 0); |
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read(hdfd[0], (char *)&nextipos, sizeof(nextipos)); |
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/* get output position; set last */ |
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thisopos = lseek(hdfd[1], (off_t)0, 2); |
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if (lastopos > 0L) { |
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lseek(hdfd[1], (off_t)lastopos, 0); |
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write(hdfd[1], (char *)&thisopos, sizeof(thisopos)); |
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lseek(hdfd[1], (off_t)0, 2); |
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} |
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lastopos = thisopos; |
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thisopos = 0L; /* write place holder */ |
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write(hdfd[1], (char *)&thisopos, sizeof(thisopos)); |
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/* copy holodeck section */ |
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copysect(hdfd[0], hdfd[1]); |
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} |
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/* clean up */ |
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close(hdfd[0]); |
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close(hdfd[1]); |
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if (outname == tempfile && rename(outname, inpname) < 0) { |
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sprintf(errmsg, "cannot rename \"%s\" to \"%s\"", |
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outname, inpname); |
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error(SYSTEM, errmsg); |
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} |
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exit(0); |
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} |
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|
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|
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long |
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rhinitcopy(hfd, infn, outfn) /* open files and copy header */ |
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int hfd[2]; /* returned file descriptors */ |
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char *infn, *outfn; |
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{ |
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FILE *infp, *outfp; |
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long ifpos; |
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/* open files for i/o */ |
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if ((infp = fopen(infn, "r")) == NULL) { |
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sprintf(errmsg, "cannot open \"%s\" for reading", infn); |
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error(SYSTEM, errmsg); |
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} |
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if (access(outfn, F_OK) == 0) { |
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sprintf(errmsg, "output file \"%s\" already exists!", outfn); |
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error(USER, errmsg); |
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} |
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if ((outfp = fopen(outfn, "w+")) == NULL) { |
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sprintf(errmsg, "cannot open \"%s\" for writing", outfn); |
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error(SYSTEM, errmsg); |
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} |
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/* set up signal handling */ |
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if (signal(SIGINT, quit) == SIG_IGN) signal(SIGINT, SIG_IGN); |
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if (signal(SIGHUP, quit) == SIG_IGN) signal(SIGHUP, SIG_IGN); |
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if (signal(SIGTERM, quit) == SIG_IGN) signal(SIGTERM, SIG_IGN); |
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#ifdef SIGXCPU |
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if (signal(SIGXCPU, quit) == SIG_IGN) signal(SIGXCPU, SIG_IGN); |
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if (signal(SIGXFSZ, quit) == SIG_IGN) signal(SIGXFSZ, SIG_IGN); |
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#endif |
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/* copy and verify header */ |
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if (checkheader(infp, HOLOFMT, outfp) < 0 || getw(infp) != HOLOMAGIC) |
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error(USER, "input not in holodeck format"); |
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fputformat(HOLOFMT, outfp); |
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fputc('\n', outfp); |
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putw(HOLOMAGIC, outfp); |
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/* get descriptors and free stdio */ |
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if ((hfd[0] = dup(fileno(infp))) < 0 || |
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(hfd[1] = dup(fileno(outfp))) < 0) |
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error(SYSTEM, "dup call failed in rhinitcopy"); |
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ifpos = ftell(infp); |
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fclose(infp); |
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if (fclose(outfp) == EOF) |
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error(SYSTEM, "file flushing error in rhinitcopy"); |
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/* check cache size */ |
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if (BKBSIZE*1024*1.5 > hdcachesize) |
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hdcachesize = BKBSIZE*1024*1.5; |
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/* return input position */ |
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return(ifpos); |
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} |
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|
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|
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int |
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nuniq(rva, n) /* sort unique rays to front of beam list */ |
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register RAYVAL *rva; |
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int n; |
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{ |
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register int i, j; |
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RAYVAL rtmp; |
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|
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for (j = 0; j < n; j++) |
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for (i = j+1; i < n; i++) |
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if ( rva[i].d == rva[j].d && |
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rva[i].r[0][0]==rva[j].r[0][0] && |
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rva[i].r[0][1]==rva[j].r[0][1] && |
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rva[i].r[1][0]==rva[j].r[1][0] && |
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rva[i].r[1][1]==rva[j].r[1][1] ) { |
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n--; /* swap duplicate with end */ |
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copystruct(&rtmp, rva+n); |
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copystruct(rva+n, rva+i); |
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copystruct(rva+i, &rtmp); |
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i--; /* recheck one we swapped */ |
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} |
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return(n); |
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} |
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|
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|
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static BEAMI *beamdir; |
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|
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static int |
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bpcmp(b1p, b2p) /* compare beam positions on disk */ |
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int *b1p, *b2p; |
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{ |
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register off_t pdif = beamdir[*b1p].fo - beamdir[*b2p].fo; |
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|
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if (pdif < 0L) return(-1); |
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return(pdif > 0L); |
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} |
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|
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static HOLO *hout; |
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|
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static int |
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xferclump(hp, bq, nb) /* transfer the given clump to hout and free */ |
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HOLO *hp; |
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int *bq, nb; |
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{ |
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register int i; |
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register BEAM *bp; |
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int n; |
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|
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beamdir = hp->bi; /* sort based on file position */ |
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qsort((void *)bq, nb, sizeof(*bq), bpcmp); |
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/* transfer and free each beam */ |
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for (i = 0; i < nb; i++) { |
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bp = hdgetbeam(hp, bq[i]); |
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DCHECK(bp==NULL, CONSISTENCY, "empty beam in xferclump"); |
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n = dupchecking ? nuniq(hdbray(bp),bp->nrm) : bp->nrm; |
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memcpy((void *)hdnewrays(hout,bq[i],n),(void *)hdbray(bp), |
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n*sizeof(RAYVAL)); |
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hdfreebeam(hp, bq[i]); |
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} |
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hdfreebeam(hout, 0); /* write & free clump */ |
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return(0); |
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} |
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|
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copysect(ifd, ofd) /* copy holodeck section from ifd to ofd */ |
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int ifd, ofd; |
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{ |
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HOLO *hinp; |
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/* load input section directory */ |
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hinp = hdinit(ifd, NULL); |
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/* create output section directory */ |
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hout = hdinit(ofd, (HDGRID *)hinp); |
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/* clump the beams */ |
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clumpbeams(hinp, 0, BKBSIZE*1024, xferclump); |
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/* clean up */ |
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hddone(hinp); |
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hddone(hout); |
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} |
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|
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|
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void |
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eputs(s) /* put error message to stderr */ |
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register char *s; |
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{ |
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static int midline = 0; |
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|
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if (!*s) |
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return; |
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if (!midline++) { /* prepend line with program name */ |
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fputs(progname, stderr); |
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fputs(": ", stderr); |
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} |
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fputs(s, stderr); |
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if (s[strlen(s)-1] == '\n') { |
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fflush(stderr); |
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midline = 0; |
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} |
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} |
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|
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|
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void |
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quit(code) /* exit the program gracefully */ |
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int code; |
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{ |
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if (tempfile[0]) |
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unlink(tempfile); |
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exit(code); |
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} |
