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Comparing ray/src/util/rcomb.c (file contents):
Revision 2.15 by greg, Thu May 23 01:28:07 2024 UTC vs.
Revision 2.35 by greg, Thu Oct 30 16:46:49 2025 UTC

#	Line 3 | Line 3 | static const char RCSid[] = "$Id$";
3		#endif
4		/*
5		* General component matrix combiner, operating on a row at a time.
6	+	*
7	+	* Multi-processing mode under Unix creates children that each work
8	+	* on one input row at a time, fed by the original process.  Final conversion
9	+	* and output to stdout is sorted by last child while its siblings send it
10	+	* their record calculations.
11		*/
12
8	–	#include <signal.h>
13		#include <math.h>
14		#include "platform.h"
15		#include "rtprocess.h"
#	Line 17 | Line 21 | static const char RCSid[] = "$Id$";
21		#define M_PI    3.14159265358979323846
22		#endif
23
20	–	#define MAXCOMP         MAXCSAMP        /* #components we support */
21	–
24		/* Unary matrix operation(s) */
25		typedef struct {
26		double          cmat[MAXCOMP*MAXCOMP];  /* component transformation */
#	Line 57 | Line 59 | int            cur_chan;                       /* if we're looping channels */
59		SUBPROC         *cproc = NULL;                  /* child process array */
60		int             nchildren = 0;                  /* # of child processes */
61		int             inchild = -1;                   /* our child ID (-1: parent) */
60	–	int             pgid = -1;                      /* process group ID */
61	–	int             nr_out = 0;                     /* # of rows output by kids */
62
63	<	static int      checksymbolic(ROPMAT *rop);
63	>	extern int      checksymbolic(ROPMAT *rop);
64
65	<	static void
66	<	on_sigio(int dummy)
67	<	{
68	<	nr_out++;                       /* happens when child outputs row */
69	<	}
70	<
71	<	static int
65	>	/* Split input matrices to allow for certain operations */
66	>	int
67		split_input(ROPMAT *rop)
68		{
69		if (rop->rmp == &rop->imx && !(rop->rmp = rmx_copy(&rop->imx))) {
#	Line 80 | Line 75 | split_input(ROPMAT *rop)
75		}
76
77		/* Check/set transform based on a reference input file */
78	<	static int
78	>	int
79		checkreffile(ROPMAT *rop)
80		{
81		static const char       *curRF = NULL;
#	Line 143 | Line 138 | checkreffile(ROPMAT *rop)
138		}
139
140		/* Compute conversion row from spectrum to one channel of RGB */
141	<	static void
141	>	void
142		rgbrow(ROPMAT *rop, int r, int p)
143		{
144		const int       nc = rop->imx.ncomp;
#	Line 160 | Line 155 | rgbrow(ROPMAT *rop, int r, int p)
155		}
156
157		/* Compute conversion row from spectrum to one channel of XYZ */
158	<	static void
158	>	void
159		xyzrow(ROPMAT *rop, int r, int p)
160		{
161		const int       nc = rop->imx.ncomp;
#	Line 177 | Line 172 | xyzrow(ROPMAT *rop, int r, int p)
172		}
173
174		/* Use the spectral sensitivity function to compute matrix coefficients */
175	<	static void
176	<	sensrow(ROPMAT *rop, int r, double (*sf)(SCOLOR sc, int ncs, const float wlpt[4]))
175	>	void
176	>	sensrow(ROPMAT *rop, int r, double (*sf)(const SCOLOR sc, int ncs, const float wlpt[4]))
177		{
178		const int       nc = rop->imx.ncomp;
179		int             i;
#	Line 192 | Line 187 | sensrow(ROPMAT *rop, int r, double (*sf)(SCOLOR sc, in
187		}
188
189		/* Check/set symbolic transform */
190	<	static int
190	>	int
191		checksymbolic(ROPMAT *rop)
192		{
193		const int       nc = rop->imx.ncomp;
#	Line 200 | Line 195 | checksymbolic(ROPMAT *rop)
195		double          cf = 1;
196		int             i, j;
197		/* check suffix => reference file */
198	<	if (strchr(rop->preop.csym, '.') > rop->preop.csym)
198	>	if (strchr(rop->preop.csym, '.') != NULL)
199		return(checkreffile(rop));
200
201		if (nc < 3) {
#	Line 306 | Line 301 | checksymbolic(ROPMAT *rop)
301		return(1);
302		}
303
304	<	static int
304	>	/* Set up color transform for matrix */
305	>	int
306		get_component_xfm(ROPMAT *rop)
307		{
308		int     i, j;
#	Line 389 | Line 385 | get_component_xfm(ROPMAT *rop)
385		return(1);
386		}
387
388	<	static int
388	>	/* Apply the given color transform and/or scaling operation */
389	>	int
390		apply_op(RMATRIX *dst, const RMATRIX *src, const RUNARYOP *ro)
391		{
392		if (ro->clen > 0) {
#	Line 408 | Line 405 | apply_op(RMATRIX *dst, const RMATRIX *src, const RUNAR
405		return(1);
406		}
407
408	<	static int
408	>	/* Open the associated input file and load/check header */
409	>	int
410		open_input(ROPMAT *rop)
411		{
412		int     outtype;
#	Line 421 | Line 419 | open_input(ROPMAT *rop)
419		rop->infp = popen(rop->inspec+1, "r");
420		else
421		rop->infp = fopen(rop->inspec, "rb");
422	<
422	>
423	>	if (!rop->infp) {
424	>	fprintf(stderr, "Cannot open for reading: %s\n",
425	>	rop->inspec);
426	>	return(0);
427	>	}
428		if (!rmx_load_header(&rop->imx, rop->infp)) {
429		fprintf(stderr, "Bad header from: %s\n", rop->inspec);
430		return(0);
#	Line 430 | Line 433 | open_input(ROPMAT *rop)
433		}
434
435		/* Return nominal wavelength associated with input component (return nm) */
436	<	static double
436	>	double
437		l_wavelength(char *nam)
438		{
439		double  comp = argument(1);
#	Line 454 | Line 457 | l_wavelength(char *nam)
457		}
458
459		/* Return ith input with optional channel selector */
460	<	static double
460	>	double
461		l_chanin(char *nam)
462		{
463		double  inp = argument(1);
#	Line 479 | Line 482 | l_chanin(char *nam)
482		return(mop[mi].rmp->mtx[cur_col*in_ncomp + chan]);
483		}
484
485	<	static int
485	>	/* Set up our operations and check consistency */
486	>	int
487		initialize(RMATRIX *imp)
488		{
489		int     i;
#	Line 492 | Line 496 | initialize(RMATRIX *imp)
496		restype = mop[i].rmp->dtype;
497		if (!imp->dtype || (restype = rmx_newtype(restype, imp->dtype)) > 0)
498		imp->dtype = restype;
499	<	else
499	>	else if (!nowarn)
500		fprintf(stderr, "%s: warning - data type mismatch\n",
501		mop[i].inspec);
502		if (!i) {
#	Line 526 | Line 530 | initialize(RMATRIX *imp)
530		return(1);
531		}
532
533	<	static void
533	>	/* Copy input header information to output header, indented */
534	>	void
535		output_headinfo(FILE *fp)
536		{
537		int     i;
#	Line 549 | Line 554 | output_headinfo(FILE *fp)
554		}
555		}
556
557	<	static int
557	>	/* Spawn the indicated number of children and return 1 in parent */
558	>	int
559		spawned_children(int np)
560		{
561		int     i, rv;
562
563		#if defined(_WIN32) || defined(_WIN64)
564		if (np > 1) {
565	<	fputs("Warning: only one process under Windows\n", stderr);
565	>	if (!nowarn)
566	>	fputs("Warning: only one process under Windows\n", stderr);
567		np = 1;
568		} else
569		#endif
570	<	if ((in_nrows > 0) & (np > in_nrows))
571	<	np = in_nrows;
570	>	if ((in_nrows > 0) & (np*4 > in_nrows))
571	>	np = in_nrows/4;
572		/* we'll be doing a row at a time */
573		for (i = 0; i < nmats; i++) {
574		mop[i].imx.nrows = 1;
#	Line 573 | Line 580 | spawned_children(int np)
580		goto memerror;
581		}
582		}
583	<	/* prep output row buffer */
584	<	if (mcat || mop[nmats].preop.clen > 0) {
583	>	/* prep output row buffer(s) */
584	>	if (mop[nmats].preop.clen > 0) {
585		if (!split_input(&mop[nmats]))  /* need separate buffer */
579	–	return(0);
580	–	if (mop[nmats].preop.clen > 0)
581	–	mop[nmats].rmp->ncomp = mop[nmats].preop.clen /
582	–	mop[nmats].imx.ncomp;
583	–	mop[nmats].rmp->nrows = 1;
584	–	if (!mcat | !mcat_last && !rmx_prepare(mop[nmats].rmp))
586		goto memerror;
587	+	mop[nmats].rmp->ncomp = mop[nmats].preop.clen /
588	+	mop[nmats].imx.ncomp;
589		}
590		mop[nmats].imx.nrows = 1;
591		if (!rmx_prepare(&mop[nmats].imx))
592		goto memerror;
593	<	if (np <= 1) {          /* single process return point */
593	>	if (mop[nmats].rmp != &mop[nmats].imx) {
594	>	mop[nmats].rmp->nrows = 1;
595	>	if (!rmx_prepare(mop[nmats].rmp))
596	>	goto memerror;
597	>	}
598	>	if (np <= 1) {          /* single process return */
599		#ifdef getc_unlocked
600		for (i = 0; i < nmats; i++)
601		flockfile(mop[i].infp);
#	Line 595 | Line 603 | spawned_children(int np)
603		#endif
604		return(0);
605		}
598	–	pgid = setpgrp();       /* set process group ID */
599	–	signal(SIGIO, on_sigio);
606		fflush(stdout);         /* flush header & spawn children */
607	<	cproc = (SUBPROC *)malloc(sizeof(SUBPROC)*np);
607	>	nchildren = np + 1;     /* extra child to sequence output */
608	>	cproc = (SUBPROC *)malloc(sizeof(SUBPROC)*nchildren);
609		if (!cproc)
610		goto memerror;
611	<	nchildren = np;
612	<	for (i = 0; i < np; i++) {
613	<	cproc[i].flags = PF_FILT_OUT;
614	<	cproc[i].w = dup(1);
615	<	cproc[i].r = 0;
616	<	cproc[i].pid = -1;
610	<	rv = open_process(&cproc[i], NULL);
611	<	if (rv <= 0) break;
612	<	}
613	<	if (rv > 0)
614	<	return(1);      /* parent return value */
611	>	for (i = nchildren; i--; ) cproc[i] = sp_inactive;
612	>	cproc[nchildren-1].flags |= PF_FILT_OUT;
613	>	/* start each child from parent */
614	>	for (i = 0; i < nchildren; i++)
615	>	if ((rv = open_process(&cproc[i], NULL)) <= 0)
616	>	break;  /* child breaks here */
617		if (rv < 0) {
618	<	perror("fork");
618	>	perror("fork"); /* WTH? */
619	>	close_processes(cproc, i);
620		exit(1);
621		}
622	<	inchild = i;            /* our child index */
623	<	while (i-- > 0)         /* don't share siblings' pipes */
622	>	if (i != nchildren-1) { /* last child is sole reader */
623	>	int     j = i;
624	>	while (j-- > 0) {
625	>	close(cproc[j].r);
626	>	cproc[j].r = -1;
627	>	}
628	>	}
629	>	if (rv > 0)
630	>	return(1);      /* parent return value */
631	>
632	>	inchild = i;            /* else set our child index */
633	>	while (i-- > 0)         /* only parent writes siblings */
634		close(cproc[i].w);
635	<	fpurge(stdin);          /* discard previous matrix input */
635	>
636	>	i = nmats;              /* close matrix streams (carefully) */
637	>	while (i-- > 0) {
638	>	if (mop[i].infp != stdin) {
639	>	close(fileno(mop[i].infp));     /* avoid lseek() */
640	>	fclose(mop[i].infp);            /* ! pclose() */
641	>	}
642	>	mop[i].infp = NULL;
643	>	}
644	>	fpurge(stdin);          /* discard previously buffered input */
645	>
646	>	if (inchild == nchildren-1)
647	>	return(-1);     /* output process return value */
648	>
649	>	i = nmats;              /* get matrix rows from parent */
650	>	while (i-- > 0) {
651	>	mop[i].infp = stdin;
652	>	mop[i].imx.dtype = DTrmx_native;
653	>	mop[i].imx.pflags &= ~RMF_SWAPIN;
654	>	}
655		#ifdef getc_unlocked
656		flockfile(stdin);
657		#endif
658	<	for (i = 0; i < nmats; i++) {
659	<	if (mop[i].infp != stdin)
628	<	fclose(mop[i].infp);    /* ! pclose() */
629	<	mop[i].infp = stdin;
630	<	mop[i].imx.dtype = DTdouble;
631	<	}
632	<	return(0);              /* child return */
658	>	mop[nmats].rmp->dtype = DTrmx_native;
659	>	return(0);              /* worker child return value */
660		memerror:
661		fputs("Out of memory in spawned_children()\n", stderr);
662		exit(1);
663		}
664
665	<	static int
666	<	parent_loop()
665	>	/* Run parental feeder loop */
666	>	int
667	>	parent_loop(void)
668		{
641	–	FILE    **outfp = (FILE **)malloc(nchildren*sizeof(FILE *));
669		int     i;
670
671	<	if (!outfp) goto memerror;
672	<	for (i = 0; i < nchildren; i++) {
673	<	outfp[i] = fdopen(cproc[i].w, "w");
674	<	if (!outfp[i]) goto memerror;
648	<	#ifdef getc_unlocked
649	<	flockfile(outfp[i]);
650	<	#endif
671	>	rmx_reset(&mop[nmats].imx);             /* not touching output side */
672	>	if (mop[nmats].rmp != &mop[nmats].imx) {
673	>	rmx_free(mop[nmats].rmp);
674	>	mop[nmats].rmp = &mop[nmats].imx;
675		}
676		#ifdef getc_unlocked
677	<	for (i = 0; i < nmats; i++)
677	>	for (i = 0; i < nmats; i++)             /* we handle matrix inputs */
678		flockfile(mop[i].infp);
679		#endif
680	+	/* load & send rows to kids */
681		for (cur_row = 0; (in_nrows <= 0) | (cur_row < in_nrows); cur_row++) {
682	<	FILE        *ofp = outfp[cur_row % nchildren];
682	>	int         wfd = cproc[cur_row % (nchildren-1)].w;
683		for (i = 0; i < nmats; i++)
684		if (!rmx_load_row(mop[i].imx.mtx, &mop[i].imx, mop[i].infp)) {
685		if (cur_row > in_nrows) /* unknown #input rows? */
686		break;
687	<	fprintf(stderr, "%s: read error at row %d\n",
687	>	fprintf(stderr, "%s: load error at row %d\n",
688		mop[i].inspec, cur_row);
689		return(0);
690		}
691		if (i < nmats)
692		break;
693		for (i = 0; i < nmats; i++)
694	<	if (!rmx_write_data(mop[i].imx.mtx, mop[i].imx.ncomp,
695	<	mop[i].imx.ncols, DTdouble, ofp))
696	<	return(0);
697	<	if (fflush(ofp) == EOF)
698	<	return(0);
694	>	if (writebuf(wfd, mop[i].imx.mtx, rmx_array_size(&mop[i].imx))
695	>	!= rmx_array_size(&mop[i].imx)) {
696	>	fprintf(stderr, "%s: write error at row %d\n",
697	>	mop[i].inspec, cur_row);
698	>	return(0);
699	>	}
700		}
701	<	for (i = 0; i < nchildren; i++)
702	<	fclose(outfp[i]);
677	<	free(outfp);
678	<	i = close_processes(cproc, nchildren);
679	<	free(cproc); cproc = NULL;
701	>	i = close_processes(cproc, nchildren);  /* collect family */
702	>	free(cproc); cproc = NULL; nchildren = 0;
703		if (i < 0) {
704	<	fputs("Warning: missing child in parent_loop()\n", stderr);
704	>	if (!nowarn)
705	>	fputs("Warning: lost child process\n", stderr);
706		return(1);
707		}
708		if (i > 0) {
709		fprintf(stderr, "Child exited with status %d\n", i);
710		return(0);
711		}
712	<	return(1);
689	<	memerror:
690	<	fputs("Out of memory in parent_loop()\n", stderr);
691	<	exit(1);
712	>	return(1);                              /* return success! */
713		}
714
715	<	static int
716	<	combine_input()
715	>	/* Main operation loop, may be run in each child */
716	>	int
717	>	combine_input(void)
718		{
719		const int       row0 = (inchild >= 0)*inchild;
720	<	const int       rstep = nchildren + !nchildren;
720	>	const int       rstep = nchildren ? nchildren-1 : 1;
721		ROPMAT          *res = &mop[nmats];
722		int             set_r, set_c;
723		RMATRIX         *tmp = NULL;
724		int             co_set;
703	–	sigset_t        iomask;
725		int             i;
726
727	<	if (mcat && mcat_last &&
728	<	!(tmp = rmx_alloc(1, res->imx.ncols, res->rmp->ncomp)))
729	<	goto memerror;
727	>	if (mcat_last && !(tmp = rmx_alloc(1, res->imx.ncols, res->rmp->ncomp))) {
728	>	fputs("Out of buffer space in combine_input()\n", stderr);
729	>	return(0);
730	>	}
731		/* figure out what the user set */
732		co_set = fundefined("co");
733		if (!co_set)
#	Line 720 | Line 742 | combine_input()
742		set_c = varlookup("c") != NULL && !vardefined("c");
743		} else                          /* save a little time */
744		set_r = set_c = 0;
745	<
724	<	sigemptyset(&iomask);           /* read/process row-by-row */
725	<	sigaddset(&iomask, SIGIO);
745	>	/* read/process row-by-row */
746		for (cur_row = row0; (in_nrows <= 0) | (cur_row < in_nrows); cur_row += rstep) {
747		RMATRIX     *mres = NULL;
728	–	if (inchild >= 0) sigprocmask(SIG_BLOCK, &iomask, NULL);
748		for (i = 0; i < nmats; i++)
749		if (!rmx_load_row(mop[i].imx.mtx, &mop[i].imx, mop[i].infp)) {
750		if (cur_row > in_nrows) /* unknown #input rows? */
751		break;
752	<	fprintf(stderr, "%s: read error at row %d\n",
752	>	fprintf(stderr, "%s: load error at row %d\n",
753		mop[i].inspec, cur_row);
754		return(0);
755		}
737	–	if (inchild >= 0) sigprocmask(SIG_UNBLOCK, &iomask, NULL);
756		if (i < nmats)
757		break;
758		for (i = 0; i < nmats; i++)
#	Line 776 | Line 794 | combine_input()
794		return(0);
795		}
796		rmx_free(mres); mres = NULL;
779	–	if (inchild >= 0) {         /* children share stdout */
780	–	while (nr_out < cur_row)
781	–	pause();            /* wait for our turn */
782	–	sigprocmask(SIG_BLOCK, &iomask, NULL);
783	–	}
797		if (!rmx_write_data(res->rmp->mtx, res->rmp->ncomp,
798	<	res->rmp->ncols, res->rmp->dtype, stdout))
798	>	res->rmp->ncols, res->rmp->dtype, stdout) ||
799	>	(inchild >= 0 && fflush(stdout) == EOF)) {
800	>	fprintf(stderr, "Conversion/write error at row %d\n",
801	>	cur_row);
802		return(0);
787	–	if (inchild >= 0) {         /* flush and notify group */
788	–	if (fflush(stdout) == EOF)
789	–	return(0);
790	–	sigprocmask(SIG_UNBLOCK, &iomask, NULL);
791	–	killpg(pgid, SIGIO);    /* increments everyone's nr_out */
803		}
804		}
805		return(inchild >= 0 || fflush(stdout) != EOF);
795	–	memerror:
796	–	fputs("Out of buffer space in combine_input()\n", stderr);
797	–	return(0);
806		multerror:
807	<	fputs("Unexpected matrix multiply error in combine_input()\n", stderr);
807	>	fputs("Unexpected matrix multiply error\n", stderr);
808		return(0);
809		}
810
811	<	static int
811	>	/* Run output process loop when #processes > 1 */
812	>	int
813	>	output_loop(void)
814	>	{
815	>	const size_t    row_size = rmx_array_size(mop[nmats].rmp);
816	>	int             cur_child = 0;
817	>	int             i = nmats;
818	>
819	>	while (i-- > 0) {                               /* free input buffers */
820	>	rmx_reset(&mop[i].imx);
821	>	if (mop[i].rmp != &mop[i].imx) {
822	>	rmx_free(mop[i].rmp);
823	>	mop[i].rmp = &mop[i].imx;
824	>	}
825	>	}
826	>	if (mop[nmats].rmp != &mop[nmats].imx)          /* output is split? */
827	>	rmx_reset(&mop[nmats].imx);
828	>	#ifdef getc_unlocked
829	>	flockfile(stdout);                              /* we own this, now */
830	>	#endif
831	>	for ( ; ; ) {                                   /* loop until no more */
832	>	ssize_t         rv;
833	>	rv = readbuf(cproc[cur_child].r, mop[nmats].rmp->mtx, row_size);
834	>	if (!rv)                                /* out of rows? */
835	>	break;
836	>	if (rv != row_size) {
837	>	fputs("Read error\n", stderr);
838	>	return(0);
839	>	}                                       /* do final conversion */
840	>	if (!rmx_write_data(mop[nmats].rmp->mtx, mop[nmats].rmp->ncomp,
841	>	mop[nmats].rmp->ncols, mop[nmats].rmp->dtype, stdout)) {
842	>	fputs("Conversion/write error\n", stderr);
843	>	return(0);
844	>	}
845	>	cur_child++;
846	>	cur_child *= (cur_child < inchild);     /* loop over workers */
847	>	}
848	>	return(fflush(stdout) != EOF);
849	>	}
850	>
851	>	/* Check/convert floating-point arguments following this */
852	>	int
853		get_factors(double da[], int n, char *av[])
854		{
855		int     ac;
#	Line 810 | Line 859 | get_factors(double da[], int n, char *av[])
859		return(ac);
860		}
861
862	<	static void
862	>	/* Resize/reallocate the input array as requested */
863	>	void
864		resize_inparr(int n2alloc)
865		{
866		int     i;
867
868		if (n2alloc == nall)
869		return;
870	<	for (i = nall; i > n2alloc; i--) {
870	>	for (i = nall; i-- > n2alloc; ) {
871		rmx_reset(&mop[i].imx);
872		if (mop[i].rmp != &mop[i].imx)
873		rmx_free(mop[i].rmp);
#	Line 843 | Line 893 | main(int argc, char *argv[])
893		int             stdin_used = 0;
894		int             nproc = 1;
895		const char      *mcat_spec = NULL;
896	+	int             transpose_mcat = 0;
897		int             n2comp = 0;
898		uby8            comp_ndx[128];
899		int             i;
#	Line 912 | Line 963 | main(int argc, char *argv[])
963		}
964		break;
965		case 'C':
966	+	mcat_last = 0;
967		if (!n || isflt(argv[i+1]))
968		goto userr;
969		defCsym = mop[nmats].preop.csym = argv[++i];
970		mop[nmats].preop.clen = 0;
919	–	mcat_last = 0;
971		break;
972		case 'c':
973	+	mcat_last = 0;
974		if (n && !isflt(argv[i+1])) {
975		mop[nmats].preop.csym = argv[++i];
976		mop[nmats].preop.clen = 0;
925	–	mcat_last = 0;
977		break;
978		}
979		if (n > MAXCOMP*MAXCOMP) n = MAXCOMP*MAXCOMP;
#	Line 935 | Line 986 | main(int argc, char *argv[])
986		goto userr;
987		}
988		mop[nmats].preop.csym = NULL;
938	–	mcat_last = 0;
989		break;
990		case 'm':
991		if (!n) goto userr;
992	+	mcat_last = 1;
993	+	transpose_mcat = (argv[i][2] == 't');
994		if (argv[++i][0] == '-' && !argv[i][1]) {
995		if (stdin_used++) goto stdin_error;
996		mcat_spec = stdin_name;
997		} else
998		mcat_spec = argv[i];
947	–	mcat_last = 1;
999		break;
1000		default:
1001		fprintf(stderr, "%s: unknown option '%s'\n",
#	Line 958 | Line 1009 | main(int argc, char *argv[])
1009		}
1010		resize_inparr(nmats+1);         /* extra matrix at end for result */
1011		mop[nmats].inspec = "trailing_ops";
1012	<	/* load final concatenation matrix */
1013	<	if (mcat_spec && !(mcat = rmx_load(mcat_spec, RMPnone))) {
1014	<	fprintf(stderr, "%s: error loading concatenation matrix: %s\n",
1015	<	argv[0], mcat_spec);
1016	<	return(1);
1012	>
1013	>	if (mcat_spec) {                /* load final concatenation matrix? */
1014	>	mcat = rmx_load(mcat_spec);
1015	>	if (!mcat) {
1016	>	fprintf(stderr, "%s: error loading concatenation matrix: %s\n",
1017	>	argv[0], mcat_spec);
1018	>	return(1);
1019	>	}
1020	>	if (transpose_mcat && !rmx_transpose(mcat)) {
1021	>	fprintf(stderr, "%s: error transposing concatenation matrix: %s\n",
1022	>	argv[0], mcat_spec);
1023	>	return(1);
1024	>	}
1025		}
1026		/* get/check inputs, set constants */
1027		if (!initialize(&mop[nmats].imx))
#	Line 1002 | Line 1061 | main(int argc, char *argv[])
1061		return(1);
1062		mop[nmats].rmp->ncols = mcat->ncols;
1063		}
1064	+	#if DTrmx_native==DTfloat
1065	+	if (outfmt == DTdouble)
1066	+	fprintf(stderr, "%s: warning - writing float result as double\n", argv[0]);
1067	+	#endif
1068		newheader("RADIANCE", stdout);  /* write output header */
1069		if (echoheader)
1070		output_headinfo(stdout);
#	Line 1013 | Line 1076 | main(int argc, char *argv[])
1076		return(1);
1077		}
1078		doptimize(1);                   /* optimize definitions */
1079	<	if (spawned_children(nproc))    /* running in parent process? */
1079	>	i = spawned_children(nproc);    /* create multiple processes if requested */
1080	>	if (i > 0)                      /* running in parent process? */
1081		return(parent_loop() ? 0 : 1);
1082	<	/* process & write rows */
1082	>	if (i < 0)                      /* running in output process? */
1083	>	return(output_loop() ? 0 : 1);
1084	>	/* else we are a worker process */
1085		return(combine_input() ? 0 : 1);
1086		stdin_error:
1087		fprintf(stderr, "%s: %s used for more than one input\n",

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