--- ray/src/util/rcollate.c	2014/05/30 18:10:20	2.12
+++ ray/src/util/rcollate.c	2022/03/16 18:01:47	2.41
@@ -1,46 +1,54 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rcollate.c,v 2.12 2014/05/30 18:10:20 greg Exp $";
+static const char RCSid[] = "$Id: rcollate.c,v 2.41 2022/03/16 18:01:47 greg Exp $";
 #endif
 /*
  * Utility to re-order records in a binary or ASCII data file (matrix)
  */
 
 #include <stdlib.h>
-#include <string.h>
 #include <ctype.h>
 #include "platform.h"
 #include "rtio.h"
 #include "resolu.h"
-#ifdef _WIN32
-#undef ftello
-#define	ftello	ftell
-#undef ssize_t
-#define ssize_t	size_t
+#if defined(_WIN32) || defined(_WIN64)
+  #undef ftello
+  #define	ftello	ftell
+  #undef ssize_t
+  #define ssize_t	size_t
 #else
-#include <sys/mman.h>
+  #include <sys/mman.h>
 #endif
 
-#ifdef getc_unlocked            /* avoid horrendous overhead of flockfile */
-#undef getc
-#undef putc
-#define getc    getc_unlocked
-#define putc    putc_unlocked
-#endif
+#define MAXLEVELS	16	/* max RxC.. block pairs */
 
 typedef struct {
+	void	*mapped;	/* memory-mapped pointer */
 	void	*base;		/* pointer to base memory */
 	size_t	len;		/* allocated memory length */
-	int	mapped;		/* memory-mapped file? */
 } MEMLOAD;		/* file loaded/mapped into memory */
 
 typedef struct {
 	int	nw_rec;		/* number of words per record */
-	int	nrecs;		/* number of records we found */
+	ssize_t	nrecs;		/* number of records we found */
 	char	*rec[1];	/* record array (extends struct) */
 } RECINDEX;
 
-int		warnings = 1;	/* report warnings? */
+int		warnings = 1;			/* report warnings? */
 
+char		*fmtid = NULL;			/* format id */
+int		comp_size = 0;			/* binary bytes/channel */
+int		n_comp = 0;			/* components/record */
+int		ni_columns = 0;			/* number of input columns */
+int		ni_rows = 0;			/* number of input rows */
+int		no_columns = 0;			/* number of output columns */
+int		no_rows = 0;			/* number of output rows */
+int		transpose = 0;			/* transpose rows & cols? */
+int		i_header = 1;			/* input header? */
+int		o_header = 1;			/* output header? */
+int		outArray[MAXLEVELS][2];		/* output block nesting */
+int		outLevels = 0;			/* number of blocking levels */
+int		check = 0;			/* force data check? */
+
 /* free loaded file */
 static void
 free_load(MEMLOAD *mp)
@@ -49,56 +57,15 @@ free_load(MEMLOAD *mp)
 		return;
 #ifdef MAP_FILE
 	if (mp->mapped)
-		munmap(mp->base, mp->len);
+		munmap(mp->mapped, mp->len);
 	else
 #endif
 		free(mp->base);
+	mp->mapped = NULL;
 	mp->base = NULL;
 	mp->len = 0;
 }
 
-/* load a file into memory */
-static int
-load_file(MEMLOAD *mp, FILE *fp)
-{
-	int	fd;
-	off_t	skip, flen;
-
-	if (mp == NULL)
-		return(-1);
-	mp->base = NULL;
-	mp->len = 0;
-	mp->mapped = 0;
-	if (fp == NULL)
-		return(-1);
-	fd = fileno(fp);
-	skip = ftello(fp);
-	flen = lseek(fd, 0, SEEK_END);
-	if (flen <= skip)
-		return((int)(flen - skip));
-	mp->len = (size_t)(flen - skip);
-#ifdef MAP_FILE
-	if (mp->len > 1L<<20) {		/* map file if > 1 MByte */
-		mp->base = mmap(NULL, mp->len, PROT_READ, MAP_PRIVATE, fd, skip);
-		if (mp->base != MAP_FAILED) {
-			mp->mapped = 1;
-			return(1);	/* mmap() success */
-		}
-		mp->base = NULL;	/* fall back to reading it in... */
-	}
-#endif
-	if (lseek(fd, skip, SEEK_SET) != skip ||
-			(mp->base = malloc(mp->len)) == NULL) {
-		mp->len = 0;
-		return(-1);
-	}
-	if (read(fd, (char *)mp->base, mp->len) != mp->len) {
-		free_load(mp);
-		return(-1);
-	}
-	return(1);
-}
-
 /* load memory from an input stream, starting from current position */
 static int
 load_stream(MEMLOAD *mp, FILE *fp)
@@ -109,14 +76,14 @@ load_stream(MEMLOAD *mp, FILE *fp)
 
 	if (mp == NULL)
 		return(-1);
+	mp->mapped = NULL;
 	mp->base = NULL;
 	mp->len = 0;
-	mp->mapped = 0;
 	if (fp == NULL)
 		return(-1);
 	while ((nr = fread(buf, 1, sizeof(buf), fp)) > 0) {
 		if (!alloced)
-			mp->base = malloc(nr);
+			mp->base = malloc(alloced = nr);
 		else if (mp->len+nr > alloced)
 			mp->base = realloc(mp->base,
 				alloced = alloced*(2+(nr==sizeof(buf)))/2+nr);
@@ -134,6 +101,58 @@ load_stream(MEMLOAD *mp, FILE *fp)
 	return(mp->len > 0);
 }
 
+#if defined(_WIN32) || defined(_WIN64)
+				/* too difficult to fix this */
+#define load_file	load_stream
+#else
+/* load a file into memory */
+static int
+load_file(MEMLOAD *mp, FILE *fp)
+{
+	int	fd;
+	off_t	skip, flen, fpos;
+	if (mp == NULL)
+		return(-1);
+	mp->mapped = NULL;
+	mp->base = NULL;
+	mp->len = 0;
+	if (fp == NULL)
+		return(-1);
+	fd = fileno(fp);
+	skip = ftello(fp);
+	flen = lseek(fd, 0, SEEK_END);
+	if (flen <= skip)
+		return((int)(flen - skip));
+	mp->len = (size_t)(flen - skip);
+#ifdef MAP_FILE
+	if (mp->len >= 1L<<20) {	/* map file if >= 1 MByte */
+		mp->mapped = mmap(NULL, flen, PROT_READ, MAP_PRIVATE, fd, 0);
+		if (mp->mapped != MAP_FAILED) {
+			mp->base = (char *)mp->mapped + skip;
+			return(1);	/* mmap() success */
+		}
+		mp->mapped = NULL;	/* else fall back to reading it in... */
+	}
+#endif
+	if (lseek(fd, skip, SEEK_SET) != skip ||
+			(mp->base = malloc(mp->len)) == NULL) {
+		mp->len = 0;
+		return(-1);
+	}
+	fpos = skip;
+	while (fpos < flen) {		/* read() fails if n > 2 GBytes */
+		ssize_t	nread = read(fd, (char *)mp->base+(fpos-skip),
+				(flen-fpos < 1L<<24) ? flen-fpos : 1L<<24);
+		if (nread <= 0) {
+			free_load(mp);
+			return(-1);
+		}
+		fpos += nread;
+	}
+	return(1);
+}
+#endif
+
 /* free a record index */
 #define free_records(rp)	free(rp)
 
@@ -141,6 +160,7 @@ load_stream(MEMLOAD *mp, FILE *fp)
 static RECINDEX *
 index_records(const MEMLOAD *mp, int nw_rec)
 {
+	int		nall = 0;
 	RECINDEX	*rp;
 	char		*cp, *mend;
 	int		n;
@@ -149,7 +169,8 @@ index_records(const MEMLOAD *mp, int nw_rec)
 		return(NULL);
 	if (nw_rec <= 0)
 		return(NULL);
-	rp = (RECINDEX *)malloc(sizeof(RECINDEX) + mp->len/(2*nw_rec)*sizeof(char *));
+	nall = 1000;
+	rp = (RECINDEX *)malloc(sizeof(RECINDEX) + nall*sizeof(char *));
 	if (rp == NULL)
 		return(NULL);
 	rp->nw_rec = nw_rec;
@@ -161,6 +182,13 @@ index_records(const MEMLOAD *mp, int nw_rec)
 			++cp;
 		if (cp >= mend)
 			break;
+		if (rp->nrecs >= nall) {
+			nall += nall>>1;	/* get more record space */
+			rp = (RECINDEX *)realloc(rp,
+					sizeof(RECINDEX) + nall*sizeof(char *));
+			if (rp == NULL)
+				return(NULL);
+		}
 		rp->rec[rp->nrecs++] = cp;	/* point to first non-white */
 		n = rp->nw_rec;
 		while (++cp < mend)		/* find end of record */
@@ -169,8 +197,7 @@ index_records(const MEMLOAD *mp, int nw_rec)
 					break;	/* got requisite # words */
 				do {		/* else find next word */
 					if (*cp == '\n') {
-						fprintf(stderr,
-						"Unexpected EOL in record!\n");
+						fputs("Unexpected EOL in record!\n", stderr);
 						free_records(rp);
 						return(NULL);
 					}
@@ -204,14 +231,18 @@ count_columns(const RECINDEX *rp)
 
 /* copy nth record from index to stdout */
 static int
-print_record(const RECINDEX *rp, int n)
+print_record(const RECINDEX *rp, ssize_t n)
 {
-	int	words2go = rp->nw_rec;
-	char	*scp;
+	static char	delims[] = " \t\n\r\f";
+	int		words2go = rp->nw_rec;
+	char		*scp;
 
 	if ((n < 0) | (n >= rp->nrecs))
 		return(0);
 	scp = rp->rec[n];
+
+	if (check && !isfltd(scp, delims))
+		goto formerr;
 	do {
 		putc(*scp++, stdout);
 		if (!*scp | isspace(*scp)) {
@@ -222,10 +253,19 @@ print_record(const RECINDEX *rp, int n)
 				if (++scp >= rp->rec[n+1])
 					break;
 			while (!*scp | isspace(*scp));
+
+			if (check && !isfltd(scp, delims))
+				goto formerr;
 		}
 	} while (scp < rp->rec[n+1]);
 						/* caller adds record sep. */
 	return(1);
+formerr:
+	fputs("Badly formed number: ", stderr);
+	while (*scp && !isspace(*scp))
+		fputc(*scp++, stderr);
+	fputc('\n', stderr);
+	return(0);
 }
 
 /* copy a stream to stdout */
@@ -237,11 +277,11 @@ output_stream(FILE *fp)
 
 	if (fp == NULL)
 		return(0);
-	fflush(stdout);			/* assumes nothing in input buffer */
-	while ((n = read(fileno(fp), buf, sizeof(buf))) > 0)
+	fflush(stdout);
+	while ((n = fread(buf, 1, sizeof(buf), fp)) > 0)
 		if (write(fileno(stdout), buf, n) != n)
 			return(0);
-	return(n >= 0);
+	return(!ferror(fp));
 }
 
 /* get next word from stream, leaving stream on EOL or start of next word */
@@ -267,14 +307,41 @@ fget_word(char buf[256], FILE *fp)
 	return(buf);
 }
 
-char		*fmtid = NULL;			/* format id */
-int		comp_size = 0;			/* binary bytes/channel */
-int		n_comp = 0;			/* components/record */
-int		ni_columns = 0;			/* number of input columns */
-int		ni_rows = 0;			/* number of input rows */
-int		no_columns = 0;			/* number of output columns */
-int		no_rows = 0;			/* number of output rows */
+/* parse RxCx... string */
+static int
+get_array(const char *spec, int blklvl[][2], int nlvls)
+{
+	int	n;
 
+	if (nlvls <= 0) {
+		fputs("Too many block levels!\n", stderr);
+		exit(1);
+	}
+	if (sscanf(spec, "%dx%d", &blklvl[0][0], &blklvl[0][1]) != 2) {
+		fputs("Bad block specification!\n", stderr);
+		exit(1);
+	}
+	while (isdigit(*spec))
+		spec++;
+	spec++;		/* 'x' */
+	while (isdigit(*spec))
+		spec++;
+	if ((*spec != 'x') & (*spec != 'X')) {
+		if (*spec) {
+			fputs("Blocks must be separated by 'x' or 'X'\n", stderr);
+			exit(1);
+		}
+		return(1);
+	}
+	spec++;
+	n = get_array(spec, blklvl+1, nlvls-1);
+	if (!n)
+		return(0);
+	blklvl[0][0] *= blklvl[1][0];
+	blklvl[0][1] *= blklvl[1][1];
+	return(n+1);
+}
+
 /* check settings and assign defaults */
 static int
 check_sizes()
@@ -288,29 +355,74 @@ check_sizes()
 			comp_size = sizeof(double);
 		else if (!strcmp(fmtid, "byte"))
 			comp_size = 1;
-		else {
+		else if (strcmp(fmtid, "ascii")) {
 			fprintf(stderr, "Unsupported format: %s\n", fmtid);
 			return(0);
 		}
 	}
+	if (transpose && (no_rows <= 0) & (no_columns <= 0)) {
+		if (ni_rows > 0) no_columns = ni_rows;
+		if (ni_columns > 0) no_rows = ni_columns;
+	} else if ((no_rows <= 0) & (no_columns > 0) &&
+			!((ni_rows*ni_columns) % no_columns))
+		no_rows = ni_rows*ni_columns/no_columns;
 	if (n_comp <= 0)
 		n_comp = 3;
 	return(1);
 }
 
-/* output transposed ASCII or binary data from memory */
+/* call to compute block input position */
+static ssize_t
+get_block_pos(int r, int c, int blklvl[][2], int nlvls)
+{
+	ssize_t	n = 0;
+
+	while (nlvls > 1) {
+		int	sr = r/blklvl[1][0];
+		int	sc = c/blklvl[1][1];
+		r -= sr*blklvl[1][0];
+		c -= sc*blklvl[1][1];
+		n += sr*blklvl[1][0]*blklvl[0][1] + sc*blklvl[1][0]*blklvl[1][1];
+		blklvl++;
+		nlvls--;
+	}
+	n += r*blklvl[0][1] + c;
+	return(n);
+}
+
+/* return input offset based on array ordering and transpose option */
+static ssize_t
+get_input_pos(int r, int c)
+{
+	ssize_t	n;
+
+	if (outLevels > 1) {		/* block reordering */
+		n = get_block_pos(r, c, outArray, outLevels);
+		if (transpose) {
+			r = n/ni_rows;
+			c = n - r*ni_rows;
+			n = (ssize_t)c*ni_columns + r;
+		}
+	} else if (transpose)		/* transpose only */
+		n = (ssize_t)c*ni_columns + r;
+	else				/* XXX should never happen! */
+		n = (ssize_t)r*no_columns + c;
+	return(n);
+}
+
+/* output reordered ASCII or binary data from memory */
 static int
-do_transpose(const MEMLOAD *mp)
+do_reorder(const MEMLOAD *mp)
 {
 	static const char	tabEOL[2] = {'\t','\n'};
 	RECINDEX		*rp = NULL;
-	long			nrecords;
+	ssize_t			nrecords;
 	int			i, j;
 						/* propogate sizes */
 	if (ni_rows <= 0)
-		ni_rows = no_columns;
+		ni_rows = transpose ? no_columns : no_rows;
 	if (ni_columns <= 0)
-		ni_columns = no_rows;
+		ni_columns = transpose ? no_rows : no_columns;
 						/* get # records (& index) */
 	if (!comp_size) {
 		if ((rp = index_records(mp, n_comp)) == NULL)
@@ -319,10 +431,10 @@ do_transpose(const MEMLOAD *mp)
 			ni_columns = count_columns(rp);
 		nrecords = rp->nrecs;
 	} else if ((ni_rows > 0) & (ni_columns > 0)) {
-		nrecords = ni_rows*ni_columns;
+		nrecords = (ssize_t)ni_rows*ni_columns;
 		if (nrecords > mp->len/(n_comp*comp_size)) {
-			fprintf(stderr,
-			    "Input too small for specified size and type\n");
+			fputs("Input too small for specified size and type\n",
+					stderr);
 			return(0);
 		}
 	} else
@@ -330,29 +442,54 @@ do_transpose(const MEMLOAD *mp)
 						/* check sizes */
 	if ((ni_rows <= 0) & (ni_columns > 0))
 		ni_rows = nrecords/ni_columns;
-	if ((ni_columns <= 0) & (ni_rows > 0))
+	else if ((ni_columns <= 0) & (ni_rows > 0))
 		ni_columns = nrecords/ni_rows;
-	if (nrecords != ni_rows*ni_columns)
+	if (nrecords != (ssize_t)ni_rows*ni_columns)
 		goto badspec;
-	if (no_columns <= 0)
-		no_columns = ni_rows;
-	if (no_rows <= 0)
-		no_rows = ni_columns;
-	if ((no_rows != ni_columns) | (no_columns != ni_rows))
-		goto badspec;
-						/* transpose records */
+	if (transpose) {
+		if (no_columns <= 0)
+			no_columns = ni_rows;
+		if (no_rows <= 0)
+			no_rows = ni_columns;
+		if (outLevels <= 1 &&
+				(no_rows != ni_columns) | (no_columns != ni_rows))
+			goto badspec;
+	} else {
+		if (no_columns <= 0)
+			no_columns = ni_columns;
+		if (no_rows <= 0)
+			no_rows = ni_rows;
+	}
+	if (ni_rows*ni_columns != no_rows*no_columns) {
+		fputs("Number of input and output records do not match\n",
+				stderr);
+		return(0);
+	}
+	if (o_header) {				/* finish header? */
+		printf("NROWS=%d\n", no_rows);
+		printf("NCOLS=%d\n", no_columns);
+		fputformat(fmtid, stdout);
+		fputc('\n', stdout);
+	}
+						/* reorder records */
 	for (i = 0; i < no_rows; i++) {
-	    for (j = 0; j < no_columns; j++)
+	    for (j = 0; j < no_columns; j++) {
+		ssize_t	n = get_input_pos(i, j);
+		if (n >= nrecords) {
+			fputs("Index past end-of-file\n", stderr);
+			return(0);
+		}
 		if (rp != NULL) {		/* ASCII output */
-			print_record(rp, j*ni_columns + i);
+			if (!print_record(rp, n))
+				return(0);
 			putc(tabEOL[j >= no_columns-1], stdout);
 		} else {			/* binary output */
-			fwrite((char *)mp->base +
-					(n_comp*comp_size)*(j*ni_columns + i),
-					n_comp*comp_size, 1, stdout);
+			putbinary((char *)mp->base + (n_comp*comp_size)*n,
+					comp_size, n_comp, stdout);
 		}
+	    }
 	    if (ferror(stdout)) {
-		fprintf(stderr, "Error writing to stdout\n");
+		fputs("Error writing to stdout\n", stderr);
 		return(0);
 	    }
 	}
@@ -360,29 +497,39 @@ do_transpose(const MEMLOAD *mp)
 		free_records(rp);
 	return(1);
 badspec:
-	fprintf(stderr, "Bad transpose specification -- check dimension(s)\n");
+	fputs("Bad dimension(s)\n", stderr);
 	return(0);
 }
 
-/* resize ASCII stream input by ignoring EOLs between records */
+/* resize stream input by ignoring EOLs between ASCII records */
 static int
 do_resize(FILE *fp)
 {
-	long	records2go = ni_rows*ni_columns;
+	ssize_t	records2go = ni_rows*ni_columns;
 	int	columns2go = no_columns;
 	char	word[256];
+			
+	if (o_header) {				/* finish header? */
+		if (no_rows > 0)
+			printf("NROWS=%d\n", no_rows);
+		if (no_columns > 0)
+			printf("NCOLS=%d\n", no_columns);
+		fputformat(fmtid, stdout);
+		fputc('\n', stdout);
+	}
 						/* sanity checks */
-	if (comp_size)
-		return(output_stream(fp));	/* binary data -- just copy */
+	if (comp_size || !check &
+			(no_columns == ni_columns) & (no_rows == ni_rows))
+		return(output_stream(fp));	/* no-op -- just copy */
 	if (no_columns <= 0) {
-		fprintf(stderr, "Missing -oc specification\n");
+		fputs("Missing -oc specification\n", stderr);
 		return(0);
 	}
 	if ((records2go <= 0) & (no_rows > 0))
 		records2go = no_rows*no_columns;
 	else if (no_rows*no_columns != records2go) {
 		fprintf(stderr,
-			"Input and output data sizes disagree (%dx%d != %dx%d)\n",
+			"Number of input and output records disagree (%dx%d != %dx%d)\n",
 				ni_rows, ni_columns, no_rows, no_columns);
 		return(0);
 	}
@@ -395,6 +542,12 @@ do_resize(FILE *fp)
 					break;
 				goto done;	/* normal EOD */
 			}
+			if (check && !isflt(word)) {
+				fputs("Badly formed number: ", stderr);
+				fputs(word, stderr);
+				fputc('\n', stderr);
+				return(0);
+			}
 			fputs(word, stdout);
 			if (n) {		/* mid-record? */
 				int	c = getc(fp);
@@ -405,7 +558,7 @@ do_resize(FILE *fp)
 			}
 		}
 		if (n >= 0) {
-			fprintf(stderr, "Incomplete record / unexpected EOF\n");
+			fputs("Incomplete record / unexpected EOF\n", stderr);
 			return(0);
 		}
 		if (--columns2go <= 0) {	/* time to end output row? */
@@ -416,9 +569,9 @@ do_resize(FILE *fp)
 	} while (--records2go);			/* expected EOD? */
 done:
 	if (warnings && columns2go != no_columns)
-		fprintf(stderr, "Warning -- incomplete final row\n");
+		fputs("Warning -- incomplete final row\n", stderr);
 	if (warnings && fget_word(word, fp) != NULL)
-		fprintf(stderr, "Warning -- characters beyond expected EOD\n");
+		fputs("Warning -- characters beyond expected EOD\n", stderr);
 	return(1);
 }
 
@@ -426,7 +579,7 @@ done:
 static int
 headline(char *s, void *p)
 {
-	static char	fmt[32];
+	static char	fmt[MAXFMTLEN];
 	int		n;
 
 	if (formatval(fmt, s)) {
@@ -460,13 +613,14 @@ headline(char *s, void *p)
 	if (!strncmp(s, "NCOMP=", 6)) {
 		n = atoi(s+6);
 		if ((n_comp > 0) & (n != n_comp)) {
-			fputs("Incorrect number of components", stderr);
+			fputs("Incorrect number of components\n", stderr);
 			return(-1);
 		}
 		n_comp = n;
 		return(0);
 	}
-	fputs(s, stdout);			/* copy header info. */
+	if (o_header)
+		fputs(s, stdout);		/* copy header info. */
 	return(0);
 }
 
@@ -474,31 +628,29 @@ headline(char *s, void *p)
 int
 main(int argc, char *argv[])
 {
-	int	i_header = 1;			/* input header? */
-	int	o_header = 1;			/* output header? */
-	int	transpose = 0;			/* transpose rows & cols? */
-	int	i;
+	int	a;
 
-	for (i = 1; i < argc && argv[i][0] == '-'; i++)
-		switch (argv[i][1]) {
+	for (a = 1; a < argc && argv[a][0] == '-'; a++)
+		switch (argv[a][1]) {
 		case 'i':			/* input */
-			if (argv[i][2] == 'c')	/* columns */
-				ni_columns = atoi(argv[++i]);
-			else if (argv[i][2] == 'r')
-				ni_rows = atoi(argv[++i]);
+			if (argv[a][2] == 'c')	/* columns */
+				ni_columns = atoi(argv[++a]);
+			else if (argv[a][2] == 'r')
+				ni_rows = atoi(argv[++a]);
 			else
 				goto userr;
 			break;
 		case 'o':			/* output */
-			if (argv[i][2] == 'c')	/* columns */
-				no_columns = atoi(argv[++i]);
-			else if (argv[i][2] == 'r')
-				no_rows = atoi(argv[++i]);
-			else
+			if (argv[a][2] == 'c')	/* columns */
+				no_columns = atoi(argv[++a]);
+			else if (argv[a][2] == 'r')
+				no_rows = atoi(argv[++a]);
+			else if (argv[a][2] ||
+			  !(outLevels=get_array(argv[++a], outArray, MAXLEVELS)))
 				goto userr;
 			break;
 		case 'h':			/* turn off header */
-			switch (argv[i][2]) {
+			switch (argv[a][2]) {
 			case 'i':
 				i_header = 0;
 				break;
@@ -516,7 +668,7 @@ main(int argc, char *argv[])
 			transpose = !transpose;
 			break;
 		case 'f':			/* format */
-			switch (argv[i][2]) {
+			switch (argv[a][2]) {
 			case 'a':		/* ASCII */
 			case 'A':
 				fmtid = "ascii";
@@ -540,32 +692,44 @@ main(int argc, char *argv[])
 			default:
 				goto userr;
 			}
-			if (argv[i][3]) {
-				if (!isdigit(argv[i][3]))
+			if (argv[a][3]) {
+				if (!isdigit(argv[a][3]))
 					goto userr;
-				n_comp = atoi(argv[i]+3);
-			}
+				n_comp = atoi(argv[a]+3);
+			} else
+				n_comp = 1;
 			break;
 		case 'w':			/* warnings on/off */
 			warnings = !warnings;
 			break;
+		case 'c':			/* force check operation */
+			check = 1;
+			break;
 		default:
 			goto userr;
 		}
-	if (i < argc-1)				/* arg count OK? */
+	if (a < argc-1)				/* arg count OK? */
 		goto userr;
+	if (outLevels) {			/* should check consistency? */
+		no_rows = outArray[0][0];
+		no_columns = outArray[0][1];
+	}
 						/* open input file? */
-	if (i == argc-1 && freopen(argv[i], "r", stdin) == NULL) {
-		fprintf(stderr, "%s: cannot open for reading\n", argv[i]);
+	if (a == argc-1 && freopen(argv[a], "r", stdin) == NULL) {
+		fprintf(stderr, "%s: cannot open for reading\n", argv[a]);
 		return(1);
 	}
 	if (comp_size) {
 		SET_FILE_BINARY(stdin);
 		SET_FILE_BINARY(stdout);
 	}
+#ifdef getc_unlocked				/* avoid stupid semaphores */
+	flockfile(stdin);
+	flockfile(stdout);
+#endif
 						/* check for no-op */
-	if (!transpose & (i_header == o_header) && (comp_size ||
-			(no_columns == ni_columns) & (no_rows == ni_rows))) {
+	if (!transpose & !check & (outLevels <= 1) & (i_header == o_header) &&
+			(no_columns == ni_columns) & (no_rows == ni_rows)) {
 		if (warnings)
 			fprintf(stderr, "%s: no-op -- copying input verbatim\n",
 				argv[0]);
@@ -574,7 +738,7 @@ main(int argc, char *argv[])
 		return(0);
 	}
 	if (i_header) {				/* read header */
-		if (getheader(stdin, &headline, NULL) < 0)
+		if (getheader(stdin, headline, NULL) < 0)
 			return(1);
 		if (!check_sizes())
 			return(1);
@@ -584,26 +748,18 @@ main(int argc, char *argv[])
 		}
 	} else if (!check_sizes())
 		return(1);
-	if (o_header) {				/* write header */
-		printargs(argc, argv, stdout);
-		if (transpose && (no_rows <= 0) & (no_columns <= 0)) {
-			if (ni_rows > 0) no_columns = ni_rows;
-			if (ni_columns > 0) no_rows = ni_columns;
-		}
-		if (no_rows > 0)
-			printf("NROWS=%d\n", no_rows);
-		if (no_columns > 0)
-			printf("NCOLS=%d\n", no_columns);
+	if (o_header) {				/* write/add to header */
+		if (!i_header)
+			newheader("RADIANCE", stdout);
+		printargs(a, argv, stdout);
 		printf("NCOMP=%d\n", n_comp);
-		fputformat(fmtid, stdout);
-		fputc('\n', stdout);		/* finish new header */
 	}
-	if (transpose) {			/* transposing rows & columns? */
-		MEMLOAD	myMem;			/* need to load into memory */
-		if (i == argc-1) {
+	if (transpose | check | (outLevels > 1) || (o_header && no_rows <= 0)) {
+		MEMLOAD	myMem;			/* need to map into memory */
+		if (a == argc-1) {
 			if (load_file(&myMem, stdin) <= 0) {
 				fprintf(stderr, "%s: error loading file into memory\n",
-						argv[i]);
+						argv[a]);
 				return(1);
 			}
 		} else if (load_stream(&myMem, stdin) <= 0) {
@@ -611,15 +767,15 @@ main(int argc, char *argv[])
 						argv[0]);
 			return(1);
 		}
-		if (!do_transpose(&myMem))
+		if (!do_reorder(&myMem))
 			return(1);
-		/* free_load(&myMem); */
+		/* free_load(&myMem);	about to exit, so don't bother */
 	} else if (!do_resize(stdin))		/* just reshaping input */
 		return(1);
 	return(0);
 userr:
 	fprintf(stderr,
-"Usage: %s [-h[io]][-w][-f[afdb][N]][-t][-ic in_col][-ir in_row][-oc out_col][-or out_row] [input.dat]\n",
+"Usage: %s [-h[io]][-w][-c][-f[afdb][N]][-t][-ic in_col][-ir in_row][-oc out_col][-or out_row][-o RxC[xR1xC1..]] [input.dat]\n",
 			argv[0]);
 	return(1);
 }