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greg |
1.1 |
#ifndef lint
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schorsch |
1.3 |
static const char RCSid[] = "$Id: total.c,v 1.2 2003/06/08 12:03:09 schorsch Exp $";
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greg |
1.1 |
#endif
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/*
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* total.c - program to reduce columns of data.
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*
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* 5/18/88
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <math.h>
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#define MAXCOL 256 /* maximum number of columns */
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#define ADD 0 /* add numbers */
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#define MULT 1 /* multiply numbers */
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#define MAX 2 /* maximum */
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#define MIN 3 /* minimum */
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double init_val[] = {0., 1., -1e12, 1e12}; /* initial values */
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int func = ADD; /* default function */
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double power = 0.0; /* power for sum */
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int mean = 0; /* compute mean */
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int count = 0; /* number to sum */
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int tabc = '\t'; /* default separator */
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int subtotal = 0; /* produce subtotals? */
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schorsch |
1.2 |
static int execute(char *fname);
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greg |
1.1 |
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schorsch |
1.2 |
int
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main(
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int argc,
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char *argv[]
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)
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greg |
1.1 |
{
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int status;
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int a;
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for (a = 1; a < argc; a++)
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if (argv[a][0] == '-')
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if (argv[a][1] >= '0' && argv[a][1] <= '9')
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count = atoi(argv[a]+1);
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else
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switch (argv[a][1]) {
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case 'm':
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mean = !mean;
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break;
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case 'p':
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func = MULT;
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break;
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case 's':
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func = ADD;
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power = atof(argv[a]+2);
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break;
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case 'u':
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func = MAX;
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break;
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case 'l':
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func = MIN;
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break;
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case 't':
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tabc = argv[a][2];
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break;
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case 'r':
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subtotal = !subtotal;
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break;
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default:
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fprintf(stderr,
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"Usage: %s [-m][-sE|p|u|l][-tC][-count [-r]] [file..]\n",
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argv[0]);
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exit(1);
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}
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else
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break;
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if (mean) {
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if (func == MAX) {
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fprintf(stderr, "%s: average maximum?!\n", argv[0]);
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exit(1);
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}
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if (func == MIN) {
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fprintf(stderr, "%s: average minimum?!\n", argv[0]);
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exit(1);
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}
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}
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status = 0;
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if (a >= argc)
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status = execute(NULL) == -1 ? 1 : status;
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else
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for ( ; a < argc; a++)
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status = execute(argv[a]) == -1 ? 2 : status;
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exit(status);
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}
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schorsch |
1.2 |
static int
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execute( /* compute result */
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char *fname
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)
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greg |
1.1 |
{
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double result[MAXCOL];
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char buf[16*MAXCOL];
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register char *cp, *num;
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register int n;
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double d;
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int ncol;
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long nlin, ltotal;
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FILE *fp;
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/* open file */
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if (fname == NULL)
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fp = stdin;
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else if ((fp = fopen(fname, "r")) == NULL) {
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fprintf(stderr, "%s: cannot open\n", fname);
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return(-1);
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}
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ltotal = 0;
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while (!feof(fp)) {
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schorsch |
1.3 |
if (ltotal == 0) { /* initialize */
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greg |
1.1 |
if (func == MULT) /* special case */
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for (n = 0; n < MAXCOL; n++)
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result[n] = 0.0;
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else
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for (n = 0; n < MAXCOL; n++)
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result[n] = init_val[func];
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schorsch |
1.3 |
}
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greg |
1.1 |
ncol = 0;
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for (nlin = 0; (count <= 0 || nlin < count) &&
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(cp = fgets(buf, sizeof(buf), fp)) != NULL;
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nlin++) {
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/* compute */
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for (n = 0; n < MAXCOL; n++) {
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while (isspace(*cp))
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cp++;
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if (!*cp)
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break;
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num = cp;
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while (*cp && !(isspace(tabc)?isspace(*cp):*cp==tabc))
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cp++;
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if (*cp)
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*cp++ = '\0';
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if (!*num || isspace(*num))
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d = init_val[func];
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else
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d = atof(num);
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switch (func) {
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case ADD:
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if (d == 0.0)
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break;
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if (power != 0.0)
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result[n] += pow(fabs(d),power);
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else
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result[n] += d;
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break;
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case MULT:
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if (d == 0.0)
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break;
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result[n] += log(fabs(d));
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break;
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case MAX:
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if (d > result[n])
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result[n] = d;
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break;
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case MIN:
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if (d < result[n])
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result[n] = d;
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break;
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}
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}
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if (n > ncol)
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ncol = n;
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}
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if (nlin == 0)
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break;
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/* compute and print */
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ltotal += nlin;
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for (n = 0; n < ncol; n++) {
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d = result[n];
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if (mean) {
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d /= (double)ltotal;
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if (func == ADD && power != 0.0 && d != 0.0)
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d = pow(d, 1.0/power);
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}
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if (func == MULT)
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d = exp(d);
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printf("%.9g%c", d, tabc);
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}
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putchar('\n');
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if (!subtotal)
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ltotal = 0;
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}
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/* close file */
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return(fclose(fp));
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}
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