src/util/rcollate.c

#ifndef lint
static const char RCSid[] = "$Id: rcollate.c,v 2.23 2016/03/06 01:13:18 schorsch 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"
#if defined(_WIN32) || defined(_WIN64)
  #undef ftello
  #define       ftello  ftell
  #undef ssize_t
  #define ssize_t       size_t
#else
  #include <sys/mman.h>
#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 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(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);
}

/* load a file into memory */
static int
load_file(MEMLOAD *mp, FILE *fp)
{
        int     fd;
        off_t   skip, flen;

#if defined(_WIN32) || defined(_WIN64)
                                /* too difficult to fix this */
        return load_stream(mp, fp);
#endif
        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);
}

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

/* compute record index */
static RECINDEX *
index_records(const MEMLOAD *mp, int nw_rec)
{
        int             nall = 0;
        RECINDEX        *rp;
        char            *cp, *mend;
        int             n;

        if (mp == NULL || (mp->base == NULL) | (mp->len <= 0))
                return(NULL);
        if (nw_rec <= 0)
                return(NULL);
        nall = 1000;
        rp = (RECINDEX *)malloc(sizeof(RECINDEX) + nall*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;
                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 */
                        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);
        while ((n = fread(buf, 1, sizeof(buf), fp)) > 0)
                if (write(fileno(stdout), buf, n) != n)
                        return(0);
        return(!ferror(fp));
}

/* 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 */
int             transpose = 0;                  /* transpose rows & cols? */
int             i_header = 1;                   /* input header? */
int             o_header = 1;                   /* output header? */

/* 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);
}

/* 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 || (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);
        }
        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\n", stderr);
                        return(-1);
                }
                n_comp = n;
                return(0);
        }
        if (o_header)
                fputs(s, stdout);               /* copy header info. */
        return(0);
}

/* main routine for converting rows/columns in data file */
int
main(int argc, char *argv[])
{
        int     a;

        for (a = 1; a < argc && argv[a][0] == '-'; a++)
                switch (argv[a][1]) {
                case 'i':                       /* input */
                        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[a][2] == 'c')  /* columns */
                                no_columns = atoi(argv[++a]);
                        else if (argv[a][2] == 'r')
                                no_rows = atoi(argv[++a]);
                        else
                                goto userr;
                        break;
                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[a][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[a][3]) {
                                if (!isdigit(argv[a][3]))
                                        goto userr;
                                n_comp = atoi(argv[a]+3);
                        } else
                                n_comp = 1;
                        break;
                case 'w':                       /* warnings on/off */
                        warnings = !warnings;
                        break;
                default:
                        goto userr;
                }
        if (a < argc-1)                         /* arg count OK? */
                goto userr;
                                                /* open input file? */
        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);
        }
                                                /* check for no-op */
        if (!transpose & (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]);
                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(a, argv, stdout);
                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 map into memory */
                if (a == argc-1) {
                        if (load_file(&myMem, stdin) <= 0) {
                                fprintf(stderr, "%s: error loading file into memory\n",
                                                argv[a]);
                                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);   about to exit, so don't bother */
        } else if (!do_resize(stdin))           /* 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:	2.24
Committed:	Sat Apr 16 00:42:16 2016 UTC (8 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.23:	+11 -2 lines
Log Message:	Made memory allocation in index_records less greedy
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.24	static const char RCSid[] = "$Id: rcollate.c,v 2.23 2016/03/06 01:13:18 schorsch 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	schorsch	2.23	#if defined(_WIN32) \|\| defined(_WIN64)
15			#undef ftello
16			#define ftello ftell
17			#undef ssize_t
18			#define ssize_t size_t
19	greg	2.7	#else
20	schorsch	2.23	#include <sys/mman.h>
21	greg	2.1	#endif
22
23			typedef struct {
24			void base; / pointer to base memory */
25			size_t len; /* allocated memory length */
26			int mapped; /* memory-mapped file? */
27			} MEMLOAD; /* file loaded/mapped into memory */
28
29			typedef struct {
30			int nw_rec; /* number of words per record */
31			int nrecs; /* number of records we found */
32			char rec[1]; / record array (extends struct) */
33			} RECINDEX;
34
35	greg	2.4	int warnings = 1; /* report warnings? */
36
37	greg	2.1	/* free loaded file */
38			static void
39			free_load(MEMLOAD *mp)
40			{
41			if (mp == NULL \|\| (mp->base == NULL) \| (mp->len <= 0))
42			return;
43			#ifdef MAP_FILE
44			if (mp->mapped)
45			munmap(mp->base, mp->len);
46			else
47			#endif
48			free(mp->base);
49			mp->base = NULL;
50			mp->len = 0;
51			}
52
53	greg	2.20	/* load memory from an input stream, starting from current position */
54			static int
55			load_stream(MEMLOAD mp, FILE fp)
56			{
57			size_t alloced = 0;
58			char buf[8192];
59			size_t nr;
60
61			if (mp == NULL)
62			return(-1);
63			mp->base = NULL;
64			mp->len = 0;
65			mp->mapped = 0;
66			if (fp == NULL)
67			return(-1);
68			while ((nr = fread(buf, 1, sizeof(buf), fp)) > 0) {
69			if (!alloced)
70	greg	2.21	mp->base = malloc(alloced = nr);
71	greg	2.20	else if (mp->len+nr > alloced)
72			mp->base = realloc(mp->base,
73			alloced = alloced*(2+(nr==sizeof(buf)))/2+nr);
74			if (mp->base == NULL)
75			return(-1);
76			memcpy((char *)mp->base + mp->len, buf, nr);
77			mp->len += nr;
78			}
79			if (ferror(fp)) {
80			free_load(mp);
81			return(-1);
82			}
83			if (alloced > mp->len5/4) / don't waste too much space */
84			mp->base = realloc(mp->base, mp->len);
85			return(mp->len > 0);
86			}
87
88	greg	2.1	/* load a file into memory */
89			static int
90			load_file(MEMLOAD mp, FILE fp)
91			{
92			int fd;
93			off_t skip, flen;
94
95	schorsch	2.23	#if defined(_WIN32) \|\| defined(_WIN64)
96			/* too difficult to fix this */
97	greg	2.20	return load_stream(mp, fp);
98			#endif
99	greg	2.1	if (mp == NULL)
100			return(-1);
101			mp->base = NULL;
102			mp->len = 0;
103			mp->mapped = 0;
104			if (fp == NULL)
105			return(-1);
106			fd = fileno(fp);
107			skip = ftello(fp);
108			flen = lseek(fd, 0, SEEK_END);
109			if (flen <= skip)
110			return((int)(flen - skip));
111			mp->len = (size_t)(flen - skip);
112			#ifdef MAP_FILE
113			if (mp->len > 1L<<20) { /* map file if > 1 MByte */
114	greg	2.2	mp->base = mmap(NULL, mp->len, PROT_READ, MAP_PRIVATE, fd, skip);
115	greg	2.1	if (mp->base != MAP_FAILED) {
116			mp->mapped = 1;
117			return(1); /* mmap() success */
118			}
119			mp->base = NULL; /* fall back to reading it in... */
120			}
121			#endif
122			if (lseek(fd, skip, SEEK_SET) != skip \|\|
123			(mp->base = malloc(mp->len)) == NULL) {
124			mp->len = 0;
125			return(-1);
126			}
127			if (read(fd, (char *)mp->base, mp->len) != mp->len) {
128			free_load(mp);
129			return(-1);
130			}
131			return(1);
132			}
133
134			/* free a record index */
135			#define free_records(rp) free(rp)
136
137			/* compute record index */
138			static RECINDEX *
139			index_records(const MEMLOAD *mp, int nw_rec)
140			{
141	greg	2.24	int nall = 0;
142	greg	2.1	RECINDEX *rp;
143			char cp, mend;
144			int n;
145
146			if (mp == NULL \|\| (mp->base == NULL) \| (mp->len <= 0))
147			return(NULL);
148			if (nw_rec <= 0)
149			return(NULL);
150	greg	2.24	nall = 1000;
151			rp = (RECINDEX )malloc(sizeof(RECINDEX) + nallsizeof(char *));
152	greg	2.1	if (rp == NULL)
153			return(NULL);
154			rp->nw_rec = nw_rec;
155			rp->nrecs = 0;
156			cp = (char *)mp->base;
157			mend = cp + mp->len;
158			for ( ; ; ) { /* whitespace-separated words */
159			while (cp < mend && !cp \| isspace(cp))
160			++cp;
161			if (cp >= mend)
162			break;
163	greg	2.24	if (rp->nrecs >= nall) {
164			nall += nall>>1; /* get more record space */
165			rp = (RECINDEX *)realloc(rp,
166			sizeof(RECINDEX) + nallsizeof(char ));
167			if (rp == NULL)
168			return(NULL);
169			}
170	greg	2.1	rp->rec[rp->nrecs++] = cp; /* point to first non-white */
171			n = rp->nw_rec;
172			while (++cp < mend) /* find end of record */
173			if (!cp \| isspace(cp)) {
174			if (--n <= 0)
175			break; /* got requisite # words */
176			do { /* else find next word */
177			if (*cp == '\n') {
178			fprintf(stderr,
179			"Unexpected EOL in record!\n");
180			free_records(rp);
181			return(NULL);
182			}
183			if (++cp >= mend)
184			break;
185			} while (!cp \| isspace(cp));
186			}
187			}
188			rp->rec[rp->nrecs] = mend; /* reallocate to save space */
189			rp = (RECINDEX *)realloc(rp,
190			sizeof(RECINDEX) + rp->nrecssizeof(char ));
191			return(rp);
192			}
193
194			/* count number of columns based on first EOL */
195			static int
196			count_columns(const RECINDEX *rp)
197			{
198			char *cp = rp->rec[0];
199			char *mend = rp->rec[rp->nrecs];
200			int i;
201
202			while (*cp != '\n')
203			if (++cp >= mend)
204			return(0);
205			for (i = 0; i < rp->nrecs; i++)
206			if (rp->rec[i] >= cp)
207			break;
208			return(i);
209			}
210
211			/* copy nth record from index to stdout */
212			static int
213			print_record(const RECINDEX *rp, int n)
214			{
215			int words2go = rp->nw_rec;
216			char *scp;
217
218			if ((n < 0) \| (n >= rp->nrecs))
219			return(0);
220			scp = rp->rec[n];
221			do {
222			putc(*scp++, stdout);
223			if (!scp \| isspace(scp)) {
224			if (--words2go <= 0)
225			break;
226			putc(' ', stdout); /* single space btwn. words */
227			do
228			if (++scp >= rp->rec[n+1])
229			break;
230			while (!scp \| isspace(scp));
231			}
232			} while (scp < rp->rec[n+1]);
233			/* caller adds record sep. */
234			return(1);
235			}
236
237			/* copy a stream to stdout */
238			static int
239			output_stream(FILE *fp)
240			{
241			char buf[8192];
242			ssize_t n;
243
244			if (fp == NULL)
245			return(0);
246	greg	2.13	fflush(stdout);
247			while ((n = fread(buf, 1, sizeof(buf), fp)) > 0)
248	greg	2.1	if (write(fileno(stdout), buf, n) != n)
249			return(0);
250	greg	2.13	return(!ferror(fp));
251	greg	2.1	}
252
253			/* get next word from stream, leaving stream on EOL or start of next word */
254			static char *
255			fget_word(char buf[256], FILE *fp)
256			{
257			int c;
258			char *cp;
259			/* skip nul's and white space */
260			while (!(c = getc(fp)) \|\| isspace(c))
261			;
262			if (c == EOF)
263			return(NULL);
264			cp = buf;
265			do
266			*cp++ = c;
267			while ((c = getc(fp)) != EOF && !isspace(c) && cp < buf+255);
268			*cp = '\0';
269			while (isspace(c) & (c != '\n'))
270			c = getc(fp);
271			if (c != EOF)
272			ungetc(c, fp);
273			return(buf);
274			}
275
276	greg	2.9	char fmtid = NULL; / format id */
277			int comp_size = 0; /* binary bytes/channel */
278			int n_comp = 0; /* components/record */
279	greg	2.1	int ni_columns = 0; /* number of input columns */
280			int ni_rows = 0; /* number of input rows */
281			int no_columns = 0; /* number of output columns */
282			int no_rows = 0; /* number of output rows */
283	greg	2.16	int transpose = 0; /* transpose rows & cols? */
284			int i_header = 1; /* input header? */
285			int o_header = 1; /* output header? */
286	greg	2.1
287	greg	2.9	/* check settings and assign defaults */
288	greg	2.11	static int
289	greg	2.9	check_sizes()
290			{
291			if (fmtid == NULL) {
292			fmtid = "ascii";
293			} else if (!comp_size) {
294			if (!strcmp(fmtid, "float"))
295			comp_size = sizeof(float);
296			else if (!strcmp(fmtid, "double"))
297			comp_size = sizeof(double);
298			else if (!strcmp(fmtid, "byte"))
299			comp_size = 1;
300	greg	2.14	else if (strcmp(fmtid, "ascii")) {
301	greg	2.11	fprintf(stderr, "Unsupported format: %s\n", fmtid);
302			return(0);
303			}
304	greg	2.9	}
305	greg	2.16	if (transpose && (no_rows <= 0) & (no_columns <= 0)) {
306			if (ni_rows > 0) no_columns = ni_rows;
307			if (ni_columns > 0) no_rows = ni_columns;
308			} else if ((no_rows <= 0) & (no_columns > 0) &&
309			!((ni_rows*ni_columns) % no_columns))
310			no_rows = ni_rows*ni_columns/no_columns;
311	greg	2.9	if (n_comp <= 0)
312			n_comp = 3;
313	greg	2.11	return(1);
314	greg	2.9	}
315
316	greg	2.1	/* output transposed ASCII or binary data from memory */
317			static int
318			do_transpose(const MEMLOAD *mp)
319			{
320			static const char tabEOL[2] = {'\t','\n'};
321			RECINDEX *rp = NULL;
322			long nrecords;
323			int i, j;
324	greg	2.5	/* propogate sizes */
325			if (ni_rows <= 0)
326			ni_rows = no_columns;
327			if (ni_columns <= 0)
328			ni_columns = no_rows;
329	greg	2.1	/* get # records (& index) */
330	greg	2.9	if (!comp_size) {
331			if ((rp = index_records(mp, n_comp)) == NULL)
332	greg	2.1	return(0);
333			if (ni_columns <= 0)
334			ni_columns = count_columns(rp);
335			nrecords = rp->nrecs;
336	greg	2.3	} else if ((ni_rows > 0) & (ni_columns > 0)) {
337	greg	2.1	nrecords = ni_rows*ni_columns;
338	greg	2.9	if (nrecords > mp->len/(n_comp*comp_size)) {
339	greg	2.3	fprintf(stderr,
340			"Input too small for specified size and type\n");
341			return(0);
342			}
343			} else
344	greg	2.9	nrecords = mp->len/(n_comp*comp_size);
345	greg	2.1	/* check sizes */
346			if ((ni_rows <= 0) & (ni_columns > 0))
347			ni_rows = nrecords/ni_columns;
348			if ((ni_columns <= 0) & (ni_rows > 0))
349			ni_columns = nrecords/ni_rows;
350			if (nrecords != ni_rows*ni_columns)
351			goto badspec;
352			if (no_columns <= 0)
353			no_columns = ni_rows;
354			if (no_rows <= 0)
355			no_rows = ni_columns;
356			if ((no_rows != ni_columns) \| (no_columns != ni_rows))
357			goto badspec;
358			/* transpose records */
359			for (i = 0; i < no_rows; i++) {
360			for (j = 0; j < no_columns; j++)
361			if (rp != NULL) { /* ASCII output */
362			print_record(rp, j*ni_columns + i);
363			putc(tabEOL[j >= no_columns-1], stdout);
364			} else { /* binary output */
365			fwrite((char *)mp->base +
366	greg	2.9	(n_compcomp_size)(j*ni_columns + i),
367			n_comp*comp_size, 1, stdout);
368	greg	2.1	}
369			if (ferror(stdout)) {
370			fprintf(stderr, "Error writing to stdout\n");
371			return(0);
372			}
373			}
374			if (rp != NULL)
375			free_records(rp);
376			return(1);
377			badspec:
378			fprintf(stderr, "Bad transpose specification -- check dimension(s)\n");
379			return(0);
380			}
381
382			/* resize ASCII stream input by ignoring EOLs between records */
383			static int
384			do_resize(FILE *fp)
385			{
386			long records2go = ni_rows*ni_columns;
387			int columns2go = no_columns;
388			char word[256];
389			/* sanity checks */
390	greg	2.19	if (comp_size \|\| (no_columns == ni_columns) & (no_rows == ni_rows))
391			return(output_stream(fp)); /* no-op -- just copy */
392	greg	2.1	if (no_columns <= 0) {
393			fprintf(stderr, "Missing -oc specification\n");
394			return(0);
395			}
396			if ((records2go <= 0) & (no_rows > 0))
397			records2go = no_rows*no_columns;
398			else if (no_rows*no_columns != records2go) {
399			fprintf(stderr,
400			"Input and output data sizes disagree (%dx%d != %dx%d)\n",
401			ni_rows, ni_columns, no_rows, no_columns);
402			return(0);
403			}
404			do { /* reshape records */
405			int n;
406
407	greg	2.9	for (n = n_comp; n--; ) {
408	greg	2.1	if (fget_word(word, fp) == NULL) {
409	greg	2.9	if (records2go > 0 \|\| n < n_comp-1)
410	greg	2.1	break;
411			goto done; /* normal EOD */
412			}
413			fputs(word, stdout);
414			if (n) { /* mid-record? */
415			int c = getc(fp);
416			if ((c == '\n') \| (c == EOF))
417			break;
418			ungetc(c, fp);
419			putc(' ', stdout);
420			}
421			}
422			if (n >= 0) {
423			fprintf(stderr, "Incomplete record / unexpected EOF\n");
424			return(0);
425			}
426			if (--columns2go <= 0) { /* time to end output row? */
427			putc('\n', stdout);
428			columns2go = no_columns;
429			} else /* else separate records */
430			putc('\t', stdout);
431			} while (--records2go); /* expected EOD? */
432			done:
433	greg	2.4	if (warnings && columns2go != no_columns)
434	greg	2.1	fprintf(stderr, "Warning -- incomplete final row\n");
435	greg	2.4	if (warnings && fget_word(word, fp) != NULL)
436			fprintf(stderr, "Warning -- characters beyond expected EOD\n");
437	greg	2.1	return(1);
438			}
439
440			/* process a header line and copy to stdout */
441			static int
442			headline(char s, void p)
443			{
444	greg	2.9	static char fmt[32];
445			int n;
446	greg	2.1
447			if (formatval(fmt, s)) {
448	greg	2.9	if (fmtid == NULL) {
449			fmtid = fmt;
450			return(0);
451			}
452	greg	2.1	if (!strcmp(fmt, fmtid))
453			return(0);
454			fprintf(stderr, "Input format '%s' != '%s'\n", fmt, fmtid);
455			return(-1);
456			}
457	greg	2.9	if (!strncmp(s, "NROWS=", 6)) {
458			n = atoi(s+6);
459			if ((ni_rows > 0) & (n != ni_rows)) {
460			fputs("Incorrect input row count\n", stderr);
461			return(-1);
462			}
463			ni_rows = n;
464			return(0);
465			}
466			if (!strncmp(s, "NCOLS=", 6)) {
467			n = atoi(s+6);
468			if ((ni_columns > 0) & (n != ni_columns)) {
469			fputs("Incorrect input column count\n", stderr);
470			return(-1);
471			}
472			ni_columns = n;
473			return(0);
474			}
475			if (!strncmp(s, "NCOMP=", 6)) {
476			n = atoi(s+6);
477			if ((n_comp > 0) & (n != n_comp)) {
478	greg	2.14	fputs("Incorrect number of components\n", stderr);
479	greg	2.9	return(-1);
480			}
481			n_comp = n;
482			return(0);
483			}
484	greg	2.16	if (o_header)
485			fputs(s, stdout); /* copy header info. */
486	greg	2.1	return(0);
487			}
488
489			/* main routine for converting rows/columns in data file */
490			int
491			main(int argc, char *argv[])
492			{
493	greg	2.14	int a;
494	greg	2.1
495	greg	2.14	for (a = 1; a < argc && argv[a][0] == '-'; a++)
496			switch (argv[a][1]) {
497	greg	2.1	case 'i': /* input */
498	greg	2.14	if (argv[a][2] == 'c') /* columns */
499			ni_columns = atoi(argv[++a]);
500			else if (argv[a][2] == 'r')
501			ni_rows = atoi(argv[++a]);
502	greg	2.1	else
503			goto userr;
504			break;
505			case 'o': /* output */
506	greg	2.14	if (argv[a][2] == 'c') /* columns */
507			no_columns = atoi(argv[++a]);
508			else if (argv[a][2] == 'r')
509			no_rows = atoi(argv[++a]);
510	greg	2.1	else
511			goto userr;
512			break;
513	greg	2.10	case 'h': /* turn off header */
514	greg	2.14	switch (argv[a][2]) {
515	greg	2.10	case 'i':
516			i_header = 0;
517			break;
518			case 'o':
519			o_header = 0;
520			break;
521			case '\0':
522			i_header = o_header = 0;
523			break;
524			default:
525			goto userr;
526			}
527	greg	2.1	break;
528			case 't': /* transpose on/off */
529			transpose = !transpose;
530			break;
531			case 'f': /* format */
532	greg	2.14	switch (argv[a][2]) {
533	greg	2.1	case 'a': /* ASCII */
534			case 'A':
535			fmtid = "ascii";
536	greg	2.9	comp_size = 0;
537	greg	2.1	break;
538			case 'f': /* float */
539			case 'F':
540			fmtid = "float";
541	greg	2.9	comp_size = sizeof(float);
542	greg	2.1	break;
543			case 'd': /* double */
544			case 'D':
545			fmtid = "double";
546	greg	2.9	comp_size = sizeof(double);
547	greg	2.1	break;
548			case 'b': /* binary (bytes) */
549			case 'B':
550			fmtid = "byte";
551	greg	2.9	comp_size = 1;
552	greg	2.1	break;
553			default:
554			goto userr;
555			}
556	greg	2.14	if (argv[a][3]) {
557			if (!isdigit(argv[a][3]))
558	greg	2.1	goto userr;
559	greg	2.14	n_comp = atoi(argv[a]+3);
560			} else
561			n_comp = 1;
562	greg	2.1	break;
563	greg	2.4	case 'w': /* warnings on/off */
564			warnings = !warnings;
565			break;
566	greg	2.1	default:
567			goto userr;
568			}
569	greg	2.14	if (a < argc-1) /* arg count OK? */
570	greg	2.1	goto userr;
571			/* open input file? */
572	greg	2.14	if (a == argc-1 && freopen(argv[a], "r", stdin) == NULL) {
573			fprintf(stderr, "%s: cannot open for reading\n", argv[a]);
574	greg	2.1	return(1);
575			}
576	greg	2.9	if (comp_size) {
577	greg	2.1	SET_FILE_BINARY(stdin);
578			SET_FILE_BINARY(stdout);
579			}
580			/* check for no-op */
581	greg	2.19	if (!transpose & (i_header == o_header) &&
582			(no_columns == ni_columns) & (no_rows == ni_rows)) {
583	greg	2.4	if (warnings)
584			fprintf(stderr, "%s: no-op -- copying input verbatim\n",
585	greg	2.1	argv[0]);
586			if (!output_stream(stdin))
587			return(1);
588			return(0);
589			}
590	greg	2.10	if (i_header) { /* read header */
591	greg	2.15	if (getheader(stdin, headline, NULL) < 0)
592	greg	2.1	return(1);
593	greg	2.11	if (!check_sizes())
594			return(1);
595	greg	2.9	if (comp_size) { /* a little late... */
596			SET_FILE_BINARY(stdin);
597			SET_FILE_BINARY(stdout);
598			}
599	greg	2.11	} else if (!check_sizes())
600			return(1);
601	greg	2.10	if (o_header) { /* write header */
602	greg	2.14	printargs(a, argv, stdout);
603	greg	2.9	if (no_rows > 0)
604			printf("NROWS=%d\n", no_rows);
605			if (no_columns > 0)
606			printf("NCOLS=%d\n", no_columns);
607			printf("NCOMP=%d\n", n_comp);
608	greg	2.1	fputformat(fmtid, stdout);
609			fputc('\n', stdout); /* finish new header */
610	greg	2.10	}
611	greg	2.1	if (transpose) { /* transposing rows & columns? */
612	greg	2.19	MEMLOAD myMem; /* need to map into memory */
613	greg	2.14	if (a == argc-1) {
614	greg	2.1	if (load_file(&myMem, stdin) <= 0) {
615			fprintf(stderr, "%s: error loading file into memory\n",
616	greg	2.14	argv[a]);
617	greg	2.1	return(1);
618			}
619			} else if (load_stream(&myMem, stdin) <= 0) {
620			fprintf(stderr, "%s: error loading stdin into memory\n",
621			argv[0]);
622			return(1);
623			}
624			if (!do_transpose(&myMem))
625			return(1);
626	greg	2.17	/* free_load(&myMem); about to exit, so don't bother */
627			} else if (!do_resize(stdin)) /* reshaping input */
628	greg	2.1	return(1);
629			return(0);
630			userr:
631			fprintf(stderr,
632	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",
633	greg	2.1	argv[0]);
634			return(1);
635			}