--- ray/src/util/rcollate.c	2013/11/18 22:02:12	2.7
+++ ray/src/util/rcollate.c	2022/03/03 03:55:13	2.39
@@ -1,41 +1,35 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rcollate.c,v 2.7 2013/11/18 22:02:12 greg Exp $";
+static const char RCSid[] = "$Id: rcollate.c,v 2.39 2022/03/03 03:55:13 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;
 
@@ -49,26 +43,65 @@ 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 memory from an input stream, starting from current position */
+static int
+load_stream(MEMLOAD *mp, FILE *fp)
+{
+	size_t	alloced = 0;
+	char	buf[8192];
+	size_t	nr;
+
+	if (mp == NULL)
+		return(-1);
+	mp->mapped = NULL;
+	mp->base = NULL;
+	mp->len = 0;
+	if (fp == NULL)
+		return(-1);
+	while ((nr = fread(buf, 1, sizeof(buf), fp)) > 0) {
+		if (!alloced)
+			mp->base = malloc(alloced = nr);
+		else if (mp->len+nr > alloced)
+			mp->base = realloc(mp->base,
+				alloced = alloced*(2+(nr==sizeof(buf)))/2+nr);
+		if (mp->base == NULL)
+			return(-1);
+		memcpy((char *)mp->base + mp->len, buf, nr);
+		mp->len += nr;
+	}
+	if (ferror(fp)) {
+		free_load(mp);
+		return(-1);
+	}
+	if (alloced > mp->len*5/4)	/* don't waste too much space */
+		mp->base = realloc(mp->base, mp->len);
+	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;
-
+	off_t	skip, flen, fpos;
 	if (mp == NULL)
 		return(-1);
+	mp->mapped = NULL;
 	mp->base = NULL;
 	mp->len = 0;
-	mp->mapped = 0;
 	if (fp == NULL)
 		return(-1);
 	fd = fileno(fp);
@@ -78,13 +111,13 @@ load_file(MEMLOAD *mp, FILE *fp)
 		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;
+	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->base = NULL;	/* fall back to reading it in... */
+		mp->mapped = NULL;	/* else fall back to reading it in... */
 	}
 #endif
 	if (lseek(fd, skip, SEEK_SET) != skip ||
@@ -92,44 +125,20 @@ load_file(MEMLOAD *mp, FILE *fp)
 		mp->len = 0;
 		return(-1);
 	}
-	if (read(fd, (char *)mp->base, mp->len) != mp->len) {
-		free_load(mp);
-		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
 
-/* load memory from an input stream, starting from current position */
-static int
-load_stream(MEMLOAD *mp, FILE *fp)
-{
-	char	buf[8192];
-	size_t	nr;
-
-	if (mp == NULL)
-		return(-1);
-	mp->base = NULL;
-	mp->len = 0;
-	mp->mapped = 0;
-	if (fp == NULL)
-		return(-1);
-	while ((nr = fread(buf, 1, sizeof(buf), fp)) > 0) {
-		if (!mp->len)
-			mp->base = malloc(nr);
-		else
-			mp->base = realloc(mp->base, mp->len+nr);
-		if (mp->base == NULL)
-			return(-1);
-		memcpy((char *)mp->base + mp->len, buf, nr);
-		mp->len += nr;
-	}
-	if (ferror(fp)) {
-		free_load(mp);
-		return(-1);
-	}
-	return(mp->len > 0);
-}
-
 /* free a record index */
 #define free_records(rp)	free(rp)
 
@@ -137,6 +146,7 @@ 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;
@@ -145,7 +155,8 @@ 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;
@@ -157,6 +168,13 @@ 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 */
@@ -200,7 +218,7 @@ 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;
@@ -233,11 +251,11 @@ 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 */
@@ -263,66 +281,200 @@ fget_word(char buf[256], FILE *fp)
 	return(buf);
 }
 
-char		*fmtid = "ascii";		/* format id */
-int		record_width = 3;		/* words/record (<0 binary) */
+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? */
 
-/* output transposed ASCII or binary data from memory */
+/* parse RxCx... string */
 static int
-do_transpose(const MEMLOAD *mp)
+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()
+{
+	if (fmtid == NULL) {
+		fmtid = "ascii";
+	} else if (!comp_size) {
+		if (!strcmp(fmtid, "float"))
+			comp_size = sizeof(float);
+		else if (!strcmp(fmtid, "double"))
+			comp_size = sizeof(double);
+		else if (!strcmp(fmtid, "byte"))
+			comp_size = 1;
+		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);
+}
+
+/* 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_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 (record_width > 0) {
-		if ((rp = index_records(mp, record_width)) == NULL)
+	if (!comp_size) {
+		if ((rp = index_records(mp, n_comp)) == NULL)
 			return(0);
 		if (ni_columns <= 0)
 			ni_columns = count_columns(rp);
 		nrecords = rp->nrecs;
 	} else if ((ni_rows > 0) & (ni_columns > 0)) {
-		nrecords = ni_rows*ni_columns;
-		if (nrecords > mp->len / -record_width) {
-			fprintf(stderr,
-			    "Input too small for specified size and type\n");
+		nrecords = (ssize_t)ni_rows*ni_columns;
+		if (nrecords > mp->len/(n_comp*comp_size)) {
+			fputs("Input too small for specified size and type\n",
+					stderr);
 			return(0);
 		}
 	} else
-		nrecords = mp->len / -record_width;
+		nrecords = mp->len/(n_comp*comp_size);
 						/* 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);
+			print_record(rp, n);
 			putc(tabEOL[j >= no_columns-1], stdout);
 		} else {			/* binary output */
-			fwrite((char *)mp->base +
-					-record_width*(j*ni_columns + i),
-					-record_width, 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");
 		return(0);
@@ -332,7 +484,7 @@ do_transpose(const MEMLOAD *mp)
 		free_records(rp);
 	return(1);
 badspec:
-	fprintf(stderr, "Bad transpose specification -- check dimension(s)\n");
+	fprintf(stderr, "Bad dimension(s)\n");
 	return(0);
 }
 
@@ -340,15 +492,22 @@ badspec:
 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];
-						/* sanity checks */
-	if (record_width <= 0) {
-		fprintf(stderr, "Bad call to do_resize (record_width = %d)\n",
-				record_width);
-		return(0);
+			
+	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 || !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");
 		return(0);
@@ -357,16 +516,16 @@ do_resize(FILE *fp)
 		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);
 	}
 	do {					/* reshape records */
 		int	n;
 
-		for (n = record_width; n--; ) {
+		for (n = n_comp; n--; ) {
 			if (fget_word(word, fp) == NULL) {
-				if (records2go > 0 || n < record_width-1)
+				if (records2go > 0 || n < n_comp-1)
 					break;
 				goto done;	/* normal EOD */
 			}
@@ -401,15 +560,48 @@ done:
 static int
 headline(char *s, void *p)
 {
-	char	fmt[32];
+	static char	fmt[MAXFMTLEN];
+	int		n;
 
 	if (formatval(fmt, s)) {
+		if (fmtid == NULL) {
+			fmtid = fmt;
+			return(0);
+		}
 		if (!strcmp(fmt, fmtid))
 			return(0);
 		fprintf(stderr, "Input format '%s' != '%s'\n", fmt, fmtid);
 		return(-1);
 	}
-	fputs(s, stdout);			/* copy header info. */
+	if (!strncmp(s, "NROWS=", 6)) {
+		n = atoi(s+6);
+		if ((ni_rows > 0) & (n != ni_rows)) {
+			fputs("Incorrect input row count\n", stderr);
+			return(-1);
+		}
+		ni_rows = n;
+		return(0);
+	}
+	if (!strncmp(s, "NCOLS=", 6)) {
+		n = atoi(s+6);
+		if ((ni_columns > 0) & (n != ni_columns)) {
+			fputs("Incorrect input column count\n", stderr);
+			return(-1);
+		}
+		ni_columns = n;
+		return(0);
+	}
+	if (!strncmp(s, "NCOMP=", 6)) {
+		n = atoi(s+6);
+		if ((n_comp > 0) & (n != n_comp)) {
+			fputs("Incorrect number of components\n", stderr);
+			return(-1);
+		}
+		n_comp = n;
+		return(0);
+	}
+	if (o_header)
+		fputs(s, stdout);		/* copy header info. */
 	return(0);
 }
 
@@ -417,87 +609,104 @@ headline(char *s, void *p)
 int
 main(int argc, char *argv[])
 {
-	int	do_header = 1;			/* header i/o? */
-	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':			/* header on/off */
-			do_header = !do_header;
+		case 'h':			/* turn off header */
+			switch (argv[a][2]) {
+			case 'i':
+				i_header = 0;
+				break;
+			case 'o':
+				o_header = 0;
+				break;
+			case '\0':
+				i_header = o_header = 0;
+				break;
+			default:
+				goto userr;
+			}
 			break;
 		case 't':			/* transpose on/off */
 			transpose = !transpose;
 			break;
 		case 'f':			/* format */
-			switch (argv[i][2]) {
+			switch (argv[a][2]) {
 			case 'a':		/* ASCII */
 			case 'A':
 				fmtid = "ascii";
-				record_width = 1;
+				comp_size = 0;
 				break;
 			case 'f':		/* float */
 			case 'F':
 				fmtid = "float";
-				record_width = -(int)sizeof(float);
+				comp_size = sizeof(float);
 				break;
 			case 'd':		/* double */
 			case 'D':
 				fmtid = "double";
-				record_width = -(int)sizeof(double);
+				comp_size = sizeof(double);
 				break;
 			case 'b':		/* binary (bytes) */
 			case 'B':
 				fmtid = "byte";
-				record_width = -1;
+				comp_size = 1;
 				break;
 			default:
 				goto userr;
 			}
-			if (argv[i][3]) {
-				if (!isdigit(argv[i][3]))
+			if (argv[a][3]) {
+				if (!isdigit(argv[a][3]))
 					goto userr;
-				record_width *= 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 (!record_width)
+	if (a < argc-1)				/* arg count OK? */
 		goto userr;
-	if (i < 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 (record_width < 0) {
+	if (comp_size) {
 		SET_FILE_BINARY(stdin);
 		SET_FILE_BINARY(stdout);
 	}
 						/* check for no-op */
-	if (!transpose && (record_width < 0 ||
-			(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]);
@@ -505,19 +714,29 @@ main(int argc, char *argv[])
 			return(1);
 		return(0);
 	}
-	if (do_header) {			/* read/write header */
-		if (getheader(stdin, &headline, NULL) < 0)
+	if (i_header) {				/* read header */
+		if (getheader(stdin, headline, NULL) < 0)
 			return(1);
-		printargs(argc, argv, stdout);
-		fputformat(fmtid, stdout);
-		fputc('\n', stdout);		/* finish new header */
+		if (!check_sizes())
+			return(1);
+		if (comp_size) {		/* a little late... */
+			SET_FILE_BINARY(stdin);
+			SET_FILE_BINARY(stdout);
+		}
+	} else if (!check_sizes())
+		return(1);
+	if (o_header) {				/* write/add to header */
+		if (!i_header)
+			newheader("RADIANCE", stdout);
+		printargs(a, argv, stdout);
+		printf("NCOMP=%d\n", n_comp);
 	}
-	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) {
@@ -525,15 +744,15 @@ 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][-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);
 }