src/util/rcollate.c

#ifndef lint
static const char RCSid[] = "$Id: rcollate.c,v 2.10 2014/05/30 16:50:43 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
#else
#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

typedef struct {
        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 */
        char    *rec[1];        /* record array (extends struct) */
} RECINDEX;

int             warnings = 1;   /* report warnings? */

/* free loaded file */
static void
free_load(MEMLOAD *mp)
{
        if (mp == NULL || (mp->base == NULL) | (mp->len <= 0))
                return;
#ifdef MAP_FILE
        if (mp->mapped)
                munmap(mp->base, mp->len);
        else
#endif
                free(mp->base);
        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)
{
        size_t  alloced = 0;
        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 (!alloced)
                        mp->base = malloc(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);
}

/* free a record index */
#define free_records(rp)        free(rp)

/* compute record index */
static RECINDEX *
index_records(const MEMLOAD *mp, int nw_rec)
{
        RECINDEX        *rp;
        char            *cp, *mend;
        int             n;

        if (mp == NULL || (mp->base == NULL) | (mp->len <= 0))
                return(NULL);
        if (nw_rec <= 0)
                return(NULL);
        rp = (RECINDEX *)malloc(sizeof(RECINDEX) + mp->len/(2*nw_rec)*sizeof(char *));
        if (rp == NULL)
                return(NULL);
        rp->nw_rec = nw_rec;
        rp->nrecs = 0;
        cp = (char *)mp->base;
        mend = cp + mp->len;
        for ( ; ; ) {                           /* whitespace-separated words */
                while (cp < mend && !*cp | isspace(*cp))
                        ++cp;
                if (cp >= mend)
                        break;
                rp->rec[rp->nrecs++] = cp;      /* point to first non-white */
                n = rp->nw_rec;
                while (++cp < mend)             /* find end of record */
                        if (!*cp | isspace(*cp)) {
                                if (--n <= 0)
                                        break;  /* got requisite # words */
                                do {            /* else find next word */
                                        if (*cp == '\n') {
                                                fprintf(stderr,
                                                "Unexpected EOL in record!\n");
                                                free_records(rp);
                                                return(NULL);
                                        }
                                        if (++cp >= mend)
                                                break;
                                } while (!*cp | isspace(*cp));
                        }
        }
        rp->rec[rp->nrecs] = mend;              /* reallocate to save space */
        rp = (RECINDEX *)realloc(rp,
                        sizeof(RECINDEX) + rp->nrecs*sizeof(char *));
        return(rp);
}

/* count number of columns based on first EOL */
static int
count_columns(const RECINDEX *rp)
{
        char    *cp = rp->rec[0];
        char    *mend = rp->rec[rp->nrecs];
        int     i;

        while (*cp != '\n')
                if (++cp >= mend)
                        return(0);
        for (i = 0; i < rp->nrecs; i++)
                if (rp->rec[i] >= cp)
                        break;
        return(i);
}

/* copy nth record from index to stdout */
static int
print_record(const RECINDEX *rp, int n)
{
        int     words2go = rp->nw_rec;
        char    *scp;

        if ((n < 0) | (n >= rp->nrecs))
                return(0);
        scp = rp->rec[n];
        do {
                putc(*scp++, stdout);
                if (!*scp | isspace(*scp)) {
                        if (--words2go <= 0)
                                break;
                        putc(' ', stdout);      /* single space btwn. words */
                        do
                                if (++scp >= rp->rec[n+1])
                                        break;
                        while (!*scp | isspace(*scp));
                }
        } while (scp < rp->rec[n+1]);
                                                /* caller adds record sep. */
        return(1);
}

/* copy a stream to stdout */
static int
output_stream(FILE *fp)
{
        char    buf[8192];
        ssize_t n;

        if (fp == NULL)
                return(0);
        fflush(stdout);                 /* assumes nothing in input buffer */
        while ((n = read(fileno(fp), buf, sizeof(buf))) > 0)
                if (write(fileno(stdout), buf, n) != n)
                        return(0);
        return(n >= 0);
}

/* get next word from stream, leaving stream on EOL or start of next word */
static char *
fget_word(char buf[256], FILE *fp)
{
        int     c;
        char    *cp;
                                        /* skip nul's and white space */
        while (!(c = getc(fp)) || isspace(c))
                ;
        if (c == EOF)
                return(NULL);
        cp = buf;
        do
                *cp++ = c;
        while ((c = getc(fp)) != EOF && !isspace(c) && cp < buf+255);
        *cp = '\0';
        while (isspace(c) & (c != '\n'))
                c = getc(fp);
        if (c != EOF)
                ungetc(c, 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 */

/* 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 {
                        fprintf(stderr, "Unsupported format: %s\n", fmtid);
                        return(0);
                }
        }
        if (n_comp <= 0)
                n_comp = 3;
        return(1);
}

/* output transposed ASCII or binary data from memory */
static int
do_transpose(const MEMLOAD *mp)
{
        static const char       tabEOL[2] = {'\t','\n'};
        RECINDEX                *rp = NULL;
        long                    nrecords;
        int                     i, j;
                                                /* propogate sizes */
        if (ni_rows <= 0)
                ni_rows = no_columns;
        if (ni_columns <= 0)
                ni_columns = no_rows;
                                                /* get # records (& index) */
        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/(n_comp*comp_size)) {
                        fprintf(stderr,
                            "Input too small for specified size and type\n");
                        return(0);
                }
        } else
                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))
                ni_columns = nrecords/ni_rows;
        if (nrecords != 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 */
        for (i = 0; i < no_rows; i++) {
            for (j = 0; j < no_columns; j++)
                if (rp != NULL) {               /* ASCII output */
                        print_record(rp, j*ni_columns + i);
                        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);
                }
            if (ferror(stdout)) {
                fprintf(stderr, "Error writing to stdout\n");
                return(0);
            }
        }
        if (rp != NULL)
                free_records(rp);
        return(1);
badspec:
        fprintf(stderr, "Bad transpose specification -- check dimension(s)\n");
        return(0);
}

/* resize ASCII stream input by ignoring EOLs between records */
static int
do_resize(FILE *fp)
{
        long    records2go = ni_rows*ni_columns;
        int     columns2go = no_columns;
        char    word[256];
                                                /* sanity checks */
        if (comp_size) {
                fputs("Bad call to do_resize (binary input)\n", stderr);
                return(0);
        }
        if (no_columns <= 0) {
                fprintf(stderr, "Missing -oc specification\n");
                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",
                                ni_rows, ni_columns, no_rows, no_columns);
                return(0);
        }
        do {                                    /* reshape records */
                int     n;

                for (n = n_comp; n--; ) {
                        if (fget_word(word, fp) == NULL) {
                                if (records2go > 0 || n < n_comp-1)
                                        break;
                                goto done;      /* normal EOD */
                        }
                        fputs(word, stdout);
                        if (n) {                /* mid-record? */
                                int     c = getc(fp);
                                if ((c == '\n') | (c == EOF))
                                        break;
                                ungetc(c, fp);
                                putc(' ', stdout);
                        }
                }
                if (n >= 0) {
                        fprintf(stderr, "Incomplete record / unexpected EOF\n");
                        return(0);
                }
                if (--columns2go <= 0) {        /* time to end output row? */
                        putc('\n', stdout);
                        columns2go = no_columns;
                } else                          /* else separate records */
                        putc('\t', stdout);
        } while (--records2go);                 /* expected EOD? */
done:
        if (warnings && columns2go != no_columns)
                fprintf(stderr, "Warning -- incomplete final row\n");
        if (warnings && fget_word(word, fp) != NULL)
                fprintf(stderr, "Warning -- characters beyond expected EOD\n");
        return(1);
}

/* process a header line and copy to stdout */
static int
headline(char *s, void *p)
{
        static char     fmt[32];
        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);
        }
        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", stderr);
                        return(-1);
                }
                n_comp = n;
                return(0);
        }
        fputs(s, stdout);                       /* copy header info. */
        return(0);
}

/* main routine for converting rows/columns in data file */
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;

        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][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]);
                        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
                                goto userr;
                        break;
                case 'h':                       /* turn off header */
                        switch (argv[i][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]) {
                        case 'a':               /* ASCII */
                        case 'A':
                                fmtid = "ascii";
                                comp_size = 0;
                                break;
                        case 'f':               /* float */
                        case 'F':
                                fmtid = "float";
                                comp_size = sizeof(float);
                                break;
                        case 'd':               /* double */
                        case 'D':
                                fmtid = "double";
                                comp_size = sizeof(double);
                                break;
                        case 'b':               /* binary (bytes) */
                        case 'B':
                                fmtid = "byte";
                                comp_size = 1;
                                break;
                        default:
                                goto userr;
                        }
                        if (argv[i][3]) {
                                if (!isdigit(argv[i][3]))
                                        goto userr;
                                n_comp = atoi(argv[i]+3);
                        }
                        break;
                case 'w':                       /* warnings on/off */
                        warnings = !warnings;
                        break;
                default:
                        goto userr;
                }
        if (i < argc-1)                         /* arg count OK? */
                goto userr;
                                                /* open input file? */
        if (i == argc-1 && freopen(argv[i], "r", stdin) == NULL) {
                fprintf(stderr, "%s: cannot open for reading\n", argv[i]);
                return(1);
        }
        if (comp_size) {
                SET_FILE_BINARY(stdin);
                SET_FILE_BINARY(stdout);
        }
                                                /* check for no-op */
        if (!transpose && (comp_size ||
                        (no_columns == ni_columns) & (no_rows == ni_rows))) {
                if (warnings)
                        fprintf(stderr, "%s: no-op -- copying input verbatim\n",
                                argv[0]);
                if (!output_stream(stdin))
                        return(1);
                return(0);
        }
        if (i_header) {                         /* read header */
                if (getheader(stdin, &headline, NULL) < 0)
                        return(1);
                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 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);
                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 (load_file(&myMem, stdin) <= 0) {
                                fprintf(stderr, "%s: error loading file into memory\n",
                                                argv[i]);
                                return(1);
                        }
                } else if (load_stream(&myMem, stdin) <= 0) {
                        fprintf(stderr, "%s: error loading stdin into memory\n",
                                                argv[0]);
                        return(1);
                }
                if (!do_transpose(&myMem))
                        return(1);
                /* free_load(&myMem); */
        } 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",
                        argv[0]);
        return(1);
}
Revision:	2.11
Committed:	Fri May 30 17:29:28 2014 UTC (9 years, 10 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.10:	+11 -5 lines
Log Message:	Added check for unsupported formats
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.11	static const char RCSid[] = "$Id: rcollate.c,v 2.10 2014/05/30 16:50:43 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Utility to re-order records in a binary or ASCII data file (matrix)
6			*/
7
8			#include <stdlib.h>
9			#include <string.h>
10			#include <ctype.h>
11			#include "platform.h"
12			#include "rtio.h"
13			#include "resolu.h"
14	greg	2.7	#ifdef _WIN32
15			#undef ftello
16			#define ftello ftell
17			#undef ssize_t
18			#define ssize_t size_t
19			#else
20	greg	2.1	#include <sys/mman.h>
21			#endif
22
23			#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */
24			#undef getc
25			#undef putc
26			#define getc getc_unlocked
27			#define putc putc_unlocked
28			#endif
29
30			typedef struct {
31			void base; / pointer to base memory */
32			size_t len; /* allocated memory length */
33			int mapped; /* memory-mapped file? */
34			} MEMLOAD; /* file loaded/mapped into memory */
35
36			typedef struct {
37			int nw_rec; /* number of words per record */
38			int nrecs; /* number of records we found */
39			char rec[1]; / record array (extends struct) */
40			} RECINDEX;
41
42	greg	2.4	int warnings = 1; /* report warnings? */
43
44	greg	2.1	/* free loaded file */
45			static void
46			free_load(MEMLOAD *mp)
47			{
48			if (mp == NULL \|\| (mp->base == NULL) \| (mp->len <= 0))
49			return;
50			#ifdef MAP_FILE
51			if (mp->mapped)
52			munmap(mp->base, mp->len);
53			else
54			#endif
55			free(mp->base);
56			mp->base = NULL;
57			mp->len = 0;
58			}
59
60			/* load a file into memory */
61			static int
62			load_file(MEMLOAD mp, FILE fp)
63			{
64			int fd;
65			off_t skip, flen;
66
67			if (mp == NULL)
68			return(-1);
69			mp->base = NULL;
70			mp->len = 0;
71			mp->mapped = 0;
72			if (fp == NULL)
73			return(-1);
74			fd = fileno(fp);
75			skip = ftello(fp);
76			flen = lseek(fd, 0, SEEK_END);
77			if (flen <= skip)
78			return((int)(flen - skip));
79			mp->len = (size_t)(flen - skip);
80			#ifdef MAP_FILE
81			if (mp->len > 1L<<20) { /* map file if > 1 MByte */
82	greg	2.2	mp->base = mmap(NULL, mp->len, PROT_READ, MAP_PRIVATE, fd, skip);
83	greg	2.1	if (mp->base != MAP_FAILED) {
84			mp->mapped = 1;
85			return(1); /* mmap() success */
86			}
87			mp->base = NULL; /* fall back to reading it in... */
88			}
89			#endif
90			if (lseek(fd, skip, SEEK_SET) != skip \|\|
91			(mp->base = malloc(mp->len)) == NULL) {
92			mp->len = 0;
93			return(-1);
94			}
95			if (read(fd, (char *)mp->base, mp->len) != mp->len) {
96			free_load(mp);
97			return(-1);
98			}
99			return(1);
100			}
101
102			/* load memory from an input stream, starting from current position */
103			static int
104			load_stream(MEMLOAD mp, FILE fp)
105			{
106	greg	2.8	size_t alloced = 0;
107	greg	2.1	char buf[8192];
108			size_t nr;
109
110			if (mp == NULL)
111			return(-1);
112			mp->base = NULL;
113			mp->len = 0;
114			mp->mapped = 0;
115			if (fp == NULL)
116			return(-1);
117			while ((nr = fread(buf, 1, sizeof(buf), fp)) > 0) {
118	greg	2.8	if (!alloced)
119	greg	2.1	mp->base = malloc(nr);
120	greg	2.8	else if (mp->len+nr > alloced)
121			mp->base = realloc(mp->base,
122			alloced = alloced*(2+(nr==sizeof(buf)))/2+nr);
123	greg	2.1	if (mp->base == NULL)
124			return(-1);
125			memcpy((char *)mp->base + mp->len, buf, nr);
126			mp->len += nr;
127			}
128			if (ferror(fp)) {
129			free_load(mp);
130			return(-1);
131			}
132	greg	2.8	if (alloced > mp->len5/4) / don't waste too much space */
133			mp->base = realloc(mp->base, mp->len);
134	greg	2.1	return(mp->len > 0);
135			}
136
137			/* free a record index */
138			#define free_records(rp) free(rp)
139
140			/* compute record index */
141			static RECINDEX *
142			index_records(const MEMLOAD *mp, int nw_rec)
143			{
144			RECINDEX *rp;
145			char cp, mend;
146			int n;
147
148			if (mp == NULL \|\| (mp->base == NULL) \| (mp->len <= 0))
149			return(NULL);
150			if (nw_rec <= 0)
151			return(NULL);
152			rp = (RECINDEX )malloc(sizeof(RECINDEX) + mp->len/(2nw_rec)sizeof(char ));
153			if (rp == NULL)
154			return(NULL);
155			rp->nw_rec = nw_rec;
156			rp->nrecs = 0;
157			cp = (char *)mp->base;
158			mend = cp + mp->len;
159			for ( ; ; ) { /* whitespace-separated words */
160			while (cp < mend && !cp \| isspace(cp))
161			++cp;
162			if (cp >= mend)
163			break;
164			rp->rec[rp->nrecs++] = cp; /* point to first non-white */
165			n = rp->nw_rec;
166			while (++cp < mend) /* find end of record */
167			if (!cp \| isspace(cp)) {
168			if (--n <= 0)
169			break; /* got requisite # words */
170			do { /* else find next word */
171			if (*cp == '\n') {
172			fprintf(stderr,
173			"Unexpected EOL in record!\n");
174			free_records(rp);
175			return(NULL);
176			}
177			if (++cp >= mend)
178			break;
179			} while (!cp \| isspace(cp));
180			}
181			}
182			rp->rec[rp->nrecs] = mend; /* reallocate to save space */
183			rp = (RECINDEX *)realloc(rp,
184			sizeof(RECINDEX) + rp->nrecssizeof(char ));
185			return(rp);
186			}
187
188			/* count number of columns based on first EOL */
189			static int
190			count_columns(const RECINDEX *rp)
191			{
192			char *cp = rp->rec[0];
193			char *mend = rp->rec[rp->nrecs];
194			int i;
195
196			while (*cp != '\n')
197			if (++cp >= mend)
198			return(0);
199			for (i = 0; i < rp->nrecs; i++)
200			if (rp->rec[i] >= cp)
201			break;
202			return(i);
203			}
204
205			/* copy nth record from index to stdout */
206			static int
207			print_record(const RECINDEX *rp, int n)
208			{
209			int words2go = rp->nw_rec;
210			char *scp;
211
212			if ((n < 0) \| (n >= rp->nrecs))
213			return(0);
214			scp = rp->rec[n];
215			do {
216			putc(*scp++, stdout);
217			if (!scp \| isspace(scp)) {
218			if (--words2go <= 0)
219			break;
220			putc(' ', stdout); /* single space btwn. words */
221			do
222			if (++scp >= rp->rec[n+1])
223			break;
224			while (!scp \| isspace(scp));
225			}
226			} while (scp < rp->rec[n+1]);
227			/* caller adds record sep. */
228			return(1);
229			}
230
231			/* copy a stream to stdout */
232			static int
233			output_stream(FILE *fp)
234			{
235			char buf[8192];
236			ssize_t n;
237
238			if (fp == NULL)
239			return(0);
240			fflush(stdout); /* assumes nothing in input buffer */
241			while ((n = read(fileno(fp), buf, sizeof(buf))) > 0)
242			if (write(fileno(stdout), buf, n) != n)
243			return(0);
244			return(n >= 0);
245			}
246
247			/* get next word from stream, leaving stream on EOL or start of next word */
248			static char *
249			fget_word(char buf[256], FILE *fp)
250			{
251			int c;
252			char *cp;
253			/* skip nul's and white space */
254			while (!(c = getc(fp)) \|\| isspace(c))
255			;
256			if (c == EOF)
257			return(NULL);
258			cp = buf;
259			do
260			*cp++ = c;
261			while ((c = getc(fp)) != EOF && !isspace(c) && cp < buf+255);
262			*cp = '\0';
263			while (isspace(c) & (c != '\n'))
264			c = getc(fp);
265			if (c != EOF)
266			ungetc(c, fp);
267			return(buf);
268			}
269
270	greg	2.9	char fmtid = NULL; / format id */
271			int comp_size = 0; /* binary bytes/channel */
272			int n_comp = 0; /* components/record */
273	greg	2.1	int ni_columns = 0; /* number of input columns */
274			int ni_rows = 0; /* number of input rows */
275			int no_columns = 0; /* number of output columns */
276			int no_rows = 0; /* number of output rows */
277
278	greg	2.9	/* check settings and assign defaults */
279	greg	2.11	static int
280	greg	2.9	check_sizes()
281			{
282			if (fmtid == NULL) {
283			fmtid = "ascii";
284			} else if (!comp_size) {
285			if (!strcmp(fmtid, "float"))
286			comp_size = sizeof(float);
287			else if (!strcmp(fmtid, "double"))
288			comp_size = sizeof(double);
289			else if (!strcmp(fmtid, "byte"))
290			comp_size = 1;
291	greg	2.11	else {
292			fprintf(stderr, "Unsupported format: %s\n", fmtid);
293			return(0);
294			}
295	greg	2.9	}
296			if (n_comp <= 0)
297			n_comp = 3;
298	greg	2.11	return(1);
299	greg	2.9	}
300
301	greg	2.1	/* output transposed ASCII or binary data from memory */
302			static int
303			do_transpose(const MEMLOAD *mp)
304			{
305			static const char tabEOL[2] = {'\t','\n'};
306			RECINDEX *rp = NULL;
307			long nrecords;
308			int i, j;
309	greg	2.5	/* propogate sizes */
310			if (ni_rows <= 0)
311			ni_rows = no_columns;
312			if (ni_columns <= 0)
313			ni_columns = no_rows;
314	greg	2.1	/* get # records (& index) */
315	greg	2.9	if (!comp_size) {
316			if ((rp = index_records(mp, n_comp)) == NULL)
317	greg	2.1	return(0);
318			if (ni_columns <= 0)
319			ni_columns = count_columns(rp);
320			nrecords = rp->nrecs;
321	greg	2.3	} else if ((ni_rows > 0) & (ni_columns > 0)) {
322	greg	2.1	nrecords = ni_rows*ni_columns;
323	greg	2.9	if (nrecords > mp->len/(n_comp*comp_size)) {
324	greg	2.3	fprintf(stderr,
325			"Input too small for specified size and type\n");
326			return(0);
327			}
328			} else
329	greg	2.9	nrecords = mp->len/(n_comp*comp_size);
330	greg	2.1	/* check sizes */
331			if ((ni_rows <= 0) & (ni_columns > 0))
332			ni_rows = nrecords/ni_columns;
333			if ((ni_columns <= 0) & (ni_rows > 0))
334			ni_columns = nrecords/ni_rows;
335			if (nrecords != ni_rows*ni_columns)
336			goto badspec;
337			if (no_columns <= 0)
338			no_columns = ni_rows;
339			if (no_rows <= 0)
340			no_rows = ni_columns;
341			if ((no_rows != ni_columns) \| (no_columns != ni_rows))
342			goto badspec;
343			/* transpose records */
344			for (i = 0; i < no_rows; i++) {
345			for (j = 0; j < no_columns; j++)
346			if (rp != NULL) { /* ASCII output */
347			print_record(rp, j*ni_columns + i);
348			putc(tabEOL[j >= no_columns-1], stdout);
349			} else { /* binary output */
350			fwrite((char *)mp->base +
351	greg	2.9	(n_compcomp_size)(j*ni_columns + i),
352			n_comp*comp_size, 1, stdout);
353	greg	2.1	}
354			if (ferror(stdout)) {
355			fprintf(stderr, "Error writing to stdout\n");
356			return(0);
357			}
358			}
359			if (rp != NULL)
360			free_records(rp);
361			return(1);
362			badspec:
363			fprintf(stderr, "Bad transpose specification -- check dimension(s)\n");
364			return(0);
365			}
366
367			/* resize ASCII stream input by ignoring EOLs between records */
368			static int
369			do_resize(FILE *fp)
370			{
371			long records2go = ni_rows*ni_columns;
372			int columns2go = no_columns;
373			char word[256];
374			/* sanity checks */
375	greg	2.9	if (comp_size) {
376			fputs("Bad call to do_resize (binary input)\n", stderr);
377	greg	2.1	return(0);
378			}
379			if (no_columns <= 0) {
380			fprintf(stderr, "Missing -oc specification\n");
381			return(0);
382			}
383			if ((records2go <= 0) & (no_rows > 0))
384			records2go = no_rows*no_columns;
385			else if (no_rows*no_columns != records2go) {
386			fprintf(stderr,
387			"Input and output data sizes disagree (%dx%d != %dx%d)\n",
388			ni_rows, ni_columns, no_rows, no_columns);
389			return(0);
390			}
391			do { /* reshape records */
392			int n;
393
394	greg	2.9	for (n = n_comp; n--; ) {
395	greg	2.1	if (fget_word(word, fp) == NULL) {
396	greg	2.9	if (records2go > 0 \|\| n < n_comp-1)
397	greg	2.1	break;
398			goto done; /* normal EOD */
399			}
400			fputs(word, stdout);
401			if (n) { /* mid-record? */
402			int c = getc(fp);
403			if ((c == '\n') \| (c == EOF))
404			break;
405			ungetc(c, fp);
406			putc(' ', stdout);
407			}
408			}
409			if (n >= 0) {
410			fprintf(stderr, "Incomplete record / unexpected EOF\n");
411			return(0);
412			}
413			if (--columns2go <= 0) { /* time to end output row? */
414			putc('\n', stdout);
415			columns2go = no_columns;
416			} else /* else separate records */
417			putc('\t', stdout);
418			} while (--records2go); /* expected EOD? */
419			done:
420	greg	2.4	if (warnings && columns2go != no_columns)
421	greg	2.1	fprintf(stderr, "Warning -- incomplete final row\n");
422	greg	2.4	if (warnings && fget_word(word, fp) != NULL)
423			fprintf(stderr, "Warning -- characters beyond expected EOD\n");
424	greg	2.1	return(1);
425			}
426
427			/* process a header line and copy to stdout */
428			static int
429			headline(char s, void p)
430			{
431	greg	2.9	static char fmt[32];
432			int n;
433	greg	2.1
434			if (formatval(fmt, s)) {
435	greg	2.9	if (fmtid == NULL) {
436			fmtid = fmt;
437			return(0);
438			}
439	greg	2.1	if (!strcmp(fmt, fmtid))
440			return(0);
441			fprintf(stderr, "Input format '%s' != '%s'\n", fmt, fmtid);
442			return(-1);
443			}
444	greg	2.9	if (!strncmp(s, "NROWS=", 6)) {
445			n = atoi(s+6);
446			if ((ni_rows > 0) & (n != ni_rows)) {
447			fputs("Incorrect input row count\n", stderr);
448			return(-1);
449			}
450			ni_rows = n;
451			return(0);
452			}
453			if (!strncmp(s, "NCOLS=", 6)) {
454			n = atoi(s+6);
455			if ((ni_columns > 0) & (n != ni_columns)) {
456			fputs("Incorrect input column count\n", stderr);
457			return(-1);
458			}
459			ni_columns = n;
460			return(0);
461			}
462			if (!strncmp(s, "NCOMP=", 6)) {
463			n = atoi(s+6);
464			if ((n_comp > 0) & (n != n_comp)) {
465			fputs("Incorrect number of components", stderr);
466			return(-1);
467			}
468			n_comp = n;
469			return(0);
470			}
471	greg	2.1	fputs(s, stdout); /* copy header info. */
472			return(0);
473			}
474
475			/* main routine for converting rows/columns in data file */
476			int
477			main(int argc, char *argv[])
478			{
479	greg	2.10	int i_header = 1; /* input header? */
480			int o_header = 1; /* output header? */
481	greg	2.1	int transpose = 0; /* transpose rows & cols? */
482			int i;
483
484			for (i = 1; i < argc && argv[i][0] == '-'; i++)
485			switch (argv[i][1]) {
486			case 'i': /* input */
487			if (argv[i][2] == 'c') /* columns */
488			ni_columns = atoi(argv[++i]);
489			else if (argv[i][2] == 'r')
490			ni_rows = atoi(argv[++i]);
491			else
492			goto userr;
493			break;
494			case 'o': /* output */
495			if (argv[i][2] == 'c') /* columns */
496			no_columns = atoi(argv[++i]);
497			else if (argv[i][2] == 'r')
498			no_rows = atoi(argv[++i]);
499			else
500			goto userr;
501			break;
502	greg	2.10	case 'h': /* turn off header */
503			switch (argv[i][2]) {
504			case 'i':
505			i_header = 0;
506			break;
507			case 'o':
508			o_header = 0;
509			break;
510			case '\0':
511			i_header = o_header = 0;
512			break;
513			default:
514			goto userr;
515			}
516	greg	2.1	break;
517			case 't': /* transpose on/off */
518			transpose = !transpose;
519			break;
520			case 'f': /* format */
521			switch (argv[i][2]) {
522			case 'a': /* ASCII */
523			case 'A':
524			fmtid = "ascii";
525	greg	2.9	comp_size = 0;
526	greg	2.1	break;
527			case 'f': /* float */
528			case 'F':
529			fmtid = "float";
530	greg	2.9	comp_size = sizeof(float);
531	greg	2.1	break;
532			case 'd': /* double */
533			case 'D':
534			fmtid = "double";
535	greg	2.9	comp_size = sizeof(double);
536	greg	2.1	break;
537			case 'b': /* binary (bytes) */
538			case 'B':
539			fmtid = "byte";
540	greg	2.9	comp_size = 1;
541	greg	2.1	break;
542			default:
543			goto userr;
544			}
545			if (argv[i][3]) {
546			if (!isdigit(argv[i][3]))
547			goto userr;
548	greg	2.9	n_comp = atoi(argv[i]+3);
549	greg	2.1	}
550			break;
551	greg	2.4	case 'w': /* warnings on/off */
552			warnings = !warnings;
553			break;
554	greg	2.1	default:
555			goto userr;
556			}
557			if (i < argc-1) /* arg count OK? */
558			goto userr;
559			/* open input file? */
560			if (i == argc-1 && freopen(argv[i], "r", stdin) == NULL) {
561			fprintf(stderr, "%s: cannot open for reading\n", argv[i]);
562			return(1);
563			}
564	greg	2.9	if (comp_size) {
565	greg	2.1	SET_FILE_BINARY(stdin);
566			SET_FILE_BINARY(stdout);
567			}
568			/* check for no-op */
569	greg	2.9	if (!transpose && (comp_size \|\|
570	greg	2.1	(no_columns == ni_columns) & (no_rows == ni_rows))) {
571	greg	2.4	if (warnings)
572			fprintf(stderr, "%s: no-op -- copying input verbatim\n",
573	greg	2.1	argv[0]);
574			if (!output_stream(stdin))
575			return(1);
576			return(0);
577			}
578	greg	2.10	if (i_header) { /* read header */
579	greg	2.1	if (getheader(stdin, &headline, NULL) < 0)
580			return(1);
581	greg	2.11	if (!check_sizes())
582			return(1);
583	greg	2.9	if (comp_size) { /* a little late... */
584			SET_FILE_BINARY(stdin);
585			SET_FILE_BINARY(stdout);
586			}
587	greg	2.11	} else if (!check_sizes())
588			return(1);
589	greg	2.10	if (o_header) { /* write header */
590	greg	2.1	printargs(argc, argv, stdout);
591	greg	2.9	if (transpose && (no_rows <= 0) & (no_columns <= 0)) {
592			if (ni_rows > 0) no_columns = ni_rows;
593			if (ni_columns > 0) no_rows = ni_columns;
594			}
595			if (no_rows > 0)
596			printf("NROWS=%d\n", no_rows);
597			if (no_columns > 0)
598			printf("NCOLS=%d\n", no_columns);
599			printf("NCOMP=%d\n", n_comp);
600	greg	2.1	fputformat(fmtid, stdout);
601			fputc('\n', stdout); /* finish new header */
602	greg	2.10	}
603	greg	2.1	if (transpose) { /* transposing rows & columns? */
604			MEMLOAD myMem; /* need to load into memory */
605			if (i == argc-1) {
606			if (load_file(&myMem, stdin) <= 0) {
607			fprintf(stderr, "%s: error loading file into memory\n",
608			argv[i]);
609			return(1);
610			}
611			} else if (load_stream(&myMem, stdin) <= 0) {
612			fprintf(stderr, "%s: error loading stdin into memory\n",
613			argv[0]);
614			return(1);
615			}
616			if (!do_transpose(&myMem))
617			return(1);
618			/* free_load(&myMem); */
619			} else if (!do_resize(stdin)) /* just reshaping input */
620			return(1);
621			return(0);
622			userr:
623			fprintf(stderr,
624	greg	2.10	"Usage: %s [-h[io]][-w][-f[afdb][N]][-t][-ic in_col][-ir in_row][-oc out_col][-or out_row] [input.dat]\n",
625	greg	2.1	argv[0]);
626			return(1);
627			}