/*-
* SPDX-License-Identifier: Beerware
*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
*/
#include <sys/cdefs.h>
#include <sys/capsicum.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <sys/ttycom.h>
#include <assert.h>
#include <capsicum_helpers.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define NSTUDENT 100
#define NCONF 6
static double const studentpct[] = { 80, 90, 95, 98, 99, 99.5 };
static double const student[NSTUDENT + 1][NCONF] = {
/* inf */ { 1.282, 1.645, 1.960, 2.326, 2.576, 3.090 },
/* 1. */ { 3.078, 6.314, 12.706, 31.821, 63.657, 318.313 },
/* 2. */ { 1.886, 2.920, 4.303, 6.965, 9.925, 22.327 },
/* 3. */ { 1.638, 2.353, 3.182, 4.541, 5.841, 10.215 },
/* 4. */ { 1.533, 2.132, 2.776, 3.747, 4.604, 7.173 },
/* 5. */ { 1.476, 2.015, 2.571, 3.365, 4.032, 5.893 },
/* 6. */ { 1.440, 1.943, 2.447, 3.143, 3.707, 5.208 },
/* 7. */ { 1.415, 1.895, 2.365, 2.998, 3.499, 4.782 },
/* 8. */ { 1.397, 1.860, 2.306, 2.896, 3.355, 4.499 },
/* 9. */ { 1.383, 1.833, 2.262, 2.821, 3.250, 4.296 },
/* 10. */ { 1.372, 1.812, 2.228, 2.764, 3.169, 4.143 },
/* 11. */ { 1.363, 1.796, 2.201, 2.718, 3.106, 4.024 },
/* 12. */ { 1.356, 1.782, 2.179, 2.681, 3.055, 3.929 },
/* 13. */ { 1.350, 1.771, 2.160, 2.650, 3.012, 3.852 },
/* 14. */ { 1.345, 1.761, 2.145, 2.624, 2.977, 3.787 },
/* 15. */ { 1.341, 1.753, 2.131, 2.602, 2.947, 3.733 },
/* 16. */ { 1.337, 1.746, 2.120, 2.583, 2.921, 3.686 },
/* 17. */ { 1.333, 1.740, 2.110, 2.567, 2.898, 3.646 },
/* 18. */ { 1.330, 1.734, 2.101, 2.552, 2.878, 3.610 },
/* 19. */ { 1.328, 1.729, 2.093, 2.539, 2.861, 3.579 },
/* 20. */ { 1.325, 1.725, 2.086, 2.528, 2.845, 3.552 },
/* 21. */ { 1.323, 1.721, 2.080, 2.518, 2.831, 3.527 },
/* 22. */ { 1.321, 1.717, 2.074, 2.508, 2.819, 3.505 },
/* 23. */ { 1.319, 1.714, 2.069, 2.500, 2.807, 3.485 },
/* 24. */ { 1.318, 1.711, 2.064, 2.492, 2.797, 3.467 },
/* 25. */ { 1.316, 1.708, 2.060, 2.485, 2.787, 3.450 },
/* 26. */ { 1.315, 1.706, 2.056, 2.479, 2.779, 3.435 },
/* 27. */ { 1.314, 1.703, 2.052, 2.473, 2.771, 3.421 },
/* 28. */ { 1.313, 1.701, 2.048, 2.467, 2.763, 3.408 },
/* 29. */ { 1.311, 1.699, 2.045, 2.462, 2.756, 3.396 },
/* 30. */ { 1.310, 1.697, 2.042, 2.457, 2.750, 3.385 },
/* 31. */ { 1.309, 1.696, 2.040, 2.453, 2.744, 3.375 },
/* 32. */ { 1.309, 1.694, 2.037, 2.449, 2.738, 3.365 },
/* 33. */ { 1.308, 1.692, 2.035, 2.445, 2.733, 3.356 },
/* 34. */ { 1.307, 1.691, 2.032, 2.441, 2.728, 3.348 },
/* 35. */ { 1.306, 1.690, 2.030, 2.438, 2.724, 3.340 },
/* 36. */ { 1.306, 1.688, 2.028, 2.434, 2.719, 3.333 },
/* 37. */ { 1.305, 1.687, 2.026, 2.431, 2.715, 3.326 },
/* 38. */ { 1.304, 1.686, 2.024, 2.429, 2.712, 3.319 },
/* 39. */ { 1.304, 1.685, 2.023, 2.426, 2.708, 3.313 },
/* 40. */ { 1.303, 1.684, 2.021, 2.423, 2.704, 3.307 },
/* 41. */ { 1.303, 1.683, 2.020, 2.421, 2.701, 3.301 },
/* 42. */ { 1.302, 1.682, 2.018, 2.418, 2.698, 3.296 },
/* 43. */ { 1.302, 1.681, 2.017, 2.416, 2.695, 3.291 },
/* 44. */ { 1.301, 1.680, 2.015, 2.414, 2.692, 3.286 },
/* 45. */ { 1.301, 1.679, 2.014, 2.412, 2.690, 3.281 },
/* 46. */ { 1.300, 1.679, 2.013, 2.410, 2.687, 3.277 },
/* 47. */ { 1.300, 1.678, 2.012, 2.408, 2.685, 3.273 },
/* 48. */ { 1.299, 1.677, 2.011, 2.407, 2.682, 3.269 },
/* 49. */ { 1.299, 1.677, 2.010, 2.405, 2.680, 3.265 },
/* 50. */ { 1.299, 1.676, 2.009, 2.403, 2.678, 3.261 },
/* 51. */ { 1.298, 1.675, 2.008, 2.402, 2.676, 3.258 },
/* 52. */ { 1.298, 1.675, 2.007, 2.400, 2.674, 3.255 },
/* 53. */ { 1.298, 1.674, 2.006, 2.399, 2.672, 3.251 },
/* 54. */ { 1.297, 1.674, 2.005, 2.397, 2.670, 3.248 },
/* 55. */ { 1.297, 1.673, 2.004, 2.396, 2.668, 3.245 },
/* 56. */ { 1.297, 1.673, 2.003, 2.395, 2.667, 3.242 },
/* 57. */ { 1.297, 1.672, 2.002, 2.394, 2.665, 3.239 },
/* 58. */ { 1.296, 1.672, 2.002, 2.392, 2.663, 3.237 },
/* 59. */ { 1.296, 1.671, 2.001, 2.391, 2.662, 3.234 },
/* 60. */ { 1.296, 1.671, 2.000, 2.390, 2.660, 3.232 },
/* 61. */ { 1.296, 1.670, 2.000, 2.389, 2.659, 3.229 },
/* 62. */ { 1.295, 1.670, 1.999, 2.388, 2.657, 3.227 },
/* 63. */ { 1.295, 1.669, 1.998, 2.387, 2.656, 3.225 },
/* 64. */ { 1.295, 1.669, 1.998, 2.386, 2.655, 3.223 },
/* 65. */ { 1.295, 1.669, 1.997, 2.385, 2.654, 3.220 },
/* 66. */ { 1.295, 1.668, 1.997, 2.384, 2.652, 3.218 },
/* 67. */ { 1.294, 1.668, 1.996, 2.383, 2.651, 3.216 },
/* 68. */ { 1.294, 1.668, 1.995, 2.382, 2.650, 3.214 },
/* 69. */ { 1.294, 1.667, 1.995, 2.382, 2.649, 3.213 },
/* 70. */ { 1.294, 1.667, 1.994, 2.381, 2.648, 3.211 },
/* 71. */ { 1.294, 1.667, 1.994, 2.380, 2.647, 3.209 },
/* 72. */ { 1.293, 1.666, 1.993, 2.379, 2.646, 3.207 },
/* 73. */ { 1.293, 1.666, 1.993, 2.379, 2.645, 3.206 },
/* 74. */ { 1.293, 1.666, 1.993, 2.378, 2.644, 3.204 },
/* 75. */ { 1.293, 1.665, 1.992, 2.377, 2.643, 3.202 },
/* 76. */ { 1.293, 1.665, 1.992, 2.376, 2.642, 3.201 },
/* 77. */ { 1.293, 1.665, 1.991, 2.376, 2.641, 3.199 },
/* 78. */ { 1.292, 1.665, 1.991, 2.375, 2.640, 3.198 },
/* 79. */ { 1.292, 1.664, 1.990, 2.374, 2.640, 3.197 },
/* 80. */ { 1.292, 1.664, 1.990, 2.374, 2.639, 3.195 },
/* 81. */ { 1.292, 1.664, 1.990, 2.373, 2.638, 3.194 },
/* 82. */ { 1.292, 1.664, 1.989, 2.373, 2.637, 3.193 },
/* 83. */ { 1.292, 1.663, 1.989, 2.372, 2.636, 3.191 },
/* 84. */ { 1.292, 1.663, 1.989, 2.372, 2.636, 3.190 },
/* 85. */ { 1.292, 1.663, 1.988, 2.371, 2.635, 3.189 },
/* 86. */ { 1.291, 1.663, 1.988, 2.370, 2.634, 3.188 },
/* 87. */ { 1.291, 1.663, 1.988, 2.370, 2.634, 3.187 },
/* 88. */ { 1.291, 1.662, 1.987, 2.369, 2.633, 3.185 },
/* 89. */ { 1.291, 1.662, 1.987, 2.369, 2.632, 3.184 },
/* 90. */ { 1.291, 1.662, 1.987, 2.368, 2.632, 3.183 },
/* 91. */ { 1.291, 1.662, 1.986, 2.368, 2.631, 3.182 },
/* 92. */ { 1.291, 1.662, 1.986, 2.368, 2.630, 3.181 },
/* 93. */ { 1.291, 1.661, 1.986, 2.367, 2.630, 3.180 },
/* 94. */ { 1.291, 1.661, 1.986, 2.367, 2.629, 3.179 },
/* 95. */ { 1.291, 1.661, 1.985, 2.366, 2.629, 3.178 },
/* 96. */ { 1.290, 1.661, 1.985, 2.366, 2.628, 3.177 },
/* 97. */ { 1.290, 1.661, 1.985, 2.365, 2.627, 3.176 },
/* 98. */ { 1.290, 1.661, 1.984, 2.365, 2.627, 3.175 },
/* 99. */ { 1.290, 1.660, 1.984, 2.365, 2.626, 3.175 },
/* 100. */ { 1.290, 1.660, 1.984, 2.364, 2.626, 3.174 }
};
#define MAX_DS 8
static char symbol[MAX_DS] = { ' ', 'x', '+', '*', '%', '#', '@', 'O' };
struct dataset {
char *name;
double *points;
size_t lpoints;
double sy, syy;
size_t n;
};
static struct dataset *
NewSet(void)
{
struct dataset *ds;
ds = calloc(1, sizeof *ds);
assert(ds != NULL);
ds->lpoints = 100000;
ds->points = calloc(sizeof *ds->points, ds->lpoints);
assert(ds->points != NULL);
ds->syy = NAN;
return(ds);
}
static void
AddPoint(struct dataset *ds, double a)
{
double *dp;
if (ds->n >= ds->lpoints) {
dp = ds->points;
ds->lpoints *= 4;
ds->points = calloc(sizeof *ds->points, ds->lpoints);
assert(ds->points != NULL);
memcpy(ds->points, dp, sizeof *dp * ds->n);
free(dp);
}
ds->points[ds->n++] = a;
ds->sy += a;
}
static double
Min(const struct dataset *ds)
{
return (ds->points[0]);
}
static double
Max(const struct dataset *ds)
{
return (ds->points[ds->n -1]);
}
static double
Avg(const struct dataset *ds)
{
return(ds->sy / ds->n);
}
static double
Median(const struct dataset *ds)
{
const size_t m = ds->n / 2;
if ((ds->n % 2) == 0)
return ((ds->points[m] + (ds->points[m - 1])) / 2);
return (ds->points[m]);
}
static double
Var(struct dataset *ds)
{
size_t z;
const double a = Avg(ds);
if (isnan(ds->syy)) {
ds->syy = 0.0;
for (z = 0; z < ds->n; z++)
ds->syy += (ds->points[z] - a) * (ds->points[z] - a);
}
return (ds->syy / (ds->n - 1.0));
}
static double
Stddev(struct dataset *ds)
{
return sqrt(Var(ds));
}
static void
VitalsHead(void)
{
printf(" N Min Max Median Avg Stddev\n");
}
static void
Vitals(struct dataset *ds, int flag)
{
printf("%c %3zu %13.8g %13.8g %13.8g %13.8g %13.8g", symbol[flag],
ds->n, Min(ds), Max(ds), Median(ds), Avg(ds), Stddev(ds));
printf("\n");
}
static void
Relative(struct dataset *ds, struct dataset *rs, int confidx)
{
double spool, s, d, e, t;
double re;
size_t z;
z = ds->n + rs->n - 2;
if (z > NSTUDENT)
t = student[0][confidx];
else
t = student[z][confidx];
spool = (ds->n - 1) * Var(ds) + (rs->n - 1) * Var(rs);
spool /= ds->n + rs->n - 2;
spool = sqrt(spool);
s = spool * sqrt(1.0 / ds->n + 1.0 / rs->n);
d = Avg(ds) - Avg(rs);
e = t * s;
re = (ds->n - 1) * Var(ds) + (rs->n - 1) * Var(rs) *
(Avg(ds) * Avg(ds)) / (Avg(rs) * Avg(rs));
re *= (ds->n + rs->n) / (ds->n * rs->n * (ds->n + rs->n - 2.0));
re = t * sqrt(re);
if (fabs(d) > e) {
printf("Difference at %.1f%% confidence\n", studentpct[confidx]);
printf(" %g +/- %g\n", d, e);
printf(" %g%% +/- %g%%\n", d * 100 / Avg(rs), re * 100 / Avg(rs));
printf(" (Student's t, pooled s = %g)\n", spool);
} else {
printf("No difference proven at %.1f%% confidence\n",
studentpct[confidx]);
}
}
struct plot {
double min;
double max;
double span;
int width;
double x0, dx;
size_t height;
char *data;
char **bar;
int separate_bars;
int num_datasets;
};
static struct plot plot;
static void
SetupPlot(int width, int separate, int num_datasets)
{
struct plot *pl;
pl = &plot;
pl->width = width;
pl->height = 0;
pl->data = NULL;
pl->bar = NULL;
pl->separate_bars = separate;
pl->num_datasets = num_datasets;
pl->min = 999e99;
pl->max = -999e99;
}
static void
AdjPlot(double a)
{
struct plot *pl;
pl = &plot;
if (a < pl->min)
pl->min = a;
if (a > pl->max)
pl->max = a;
pl->span = pl->max - pl->min;
pl->dx = pl->span / (pl->width - 1.0);
pl->x0 = pl->min - .5 * pl->dx;
}
static void
DimPlot(struct dataset *ds)
{
AdjPlot(Min(ds));
AdjPlot(Max(ds));
AdjPlot(Avg(ds) - Stddev(ds));
AdjPlot(Avg(ds) + Stddev(ds));
}
static void
PlotSet(struct dataset *ds, int val)
{
struct plot *pl;
int i, x;
size_t m, j, z;
size_t n;
int bar;
double av, sd;
pl = &plot;
if (pl->span == 0)
return;
if (pl->separate_bars)
bar = val-1;
else
bar = 0;
if (pl->bar == NULL) {
pl->bar = calloc(sizeof(char *), pl->num_datasets);
assert(pl->bar != NULL);
}
if (pl->bar[bar] == NULL) {
pl->bar[bar] = malloc(pl->width);
assert(pl->bar[bar] != NULL);
memset(pl->bar[bar], 0, pl->width);
}
m = 1;
i = -1;
j = 0;
/* Set m to max(j) + 1, to allocate required memory */
for (n = 0; n < ds->n; n++) {
x = (ds->points[n] - pl->x0) / pl->dx;
if (x == i) {
j++;
if (j > m)
m = j;
} else {
j = 1;
i = x;
}
}
m += 1;
if (m > pl->height) {
pl->data = realloc(pl->data, pl->width * m);
assert(pl->data != NULL);
memset(pl->data + pl->height * pl->width, 0,
(m - pl->height) * pl->width);
}
pl->height = m;
i = -1;
for (n = 0; n < ds->n; n++) {
x = (ds->points[n] - pl->x0) / pl->dx;
if (x == i) {
j++;
} else {
j = 1;
i = x;
}
pl->data[j * pl->width + x] |= val;
}
av = Avg(ds);
sd = Stddev(ds);
if (!isnan(sd)) {
x = ((av - sd) - pl->x0) / pl->dx;
m = ((av + sd) - pl->x0) / pl->dx;
pl->bar[bar][m] = '|';
pl->bar[bar][x] = '|';
for (z = x + 1; z < m; z++)
if (pl->bar[bar][z] == 0)
pl->bar[bar][z] = '_';
}
x = (Median(ds) - pl->x0) / pl->dx;
pl->bar[bar][x] = 'M';
x = (av - pl->x0) / pl->dx;
pl->bar[bar][x] = 'A';
}
static void
DumpPlot(void)
{
struct plot *pl;
int i, j, k;
size_t z;
pl = &plot;
if (pl->span == 0) {
printf("[no plot, span is zero width]\n");
return;
}
putchar('+');
for (i = 0; i < pl->width; i++)
putchar('-');
putchar('+');
putchar('\n');
for (z = 1; z < pl->height; z++) {
putchar('|');
for (j = 0; j < pl->width; j++) {
k = pl->data[(pl->height - z) * pl->width + j];
if (k >= 0 && k < MAX_DS)
putchar(symbol[k]);
else
printf("[%02x]", k);
}
putchar('|');
putchar('\n');
}
for (i = 0; i < pl->num_datasets; i++) {
if (pl->bar[i] == NULL)
continue;
putchar('|');
for (j = 0; j < pl->width; j++) {
k = pl->bar[i][j];
if (k == 0)
k = ' ';
putchar(k);
}
putchar('|');
putchar('\n');
}
putchar('+');
for (i = 0; i < pl->width; i++)
putchar('-');
putchar('+');
putchar('\n');
}
static int
dbl_cmp(const void *a, const void *b)
{
const double *aa = a;
const double *bb = b;
if (*aa < *bb)
return (-1);
else if (*aa > *bb)
return (1);
else
return (0);
}
static struct dataset *
ReadSet(FILE *f, const char *n, int column, const char *delim)
{
char buf[BUFSIZ], *p, *t;
struct dataset *s;
double d;
int line;
int i;
s = NewSet();
s->name = strdup(n);
assert(s->name != NULL);
line = 0;
while (fgets(buf, sizeof buf, f) != NULL) {
line++;
i = strlen(buf);
while (i > 0 && isspace(buf[i - 1]))
buf[--i] = '\0';
for (i = 1, t = strtok(buf, delim);
t != NULL && *t != '#';
i++, t = strtok(NULL, delim)) {
if (i == column)
break;
}
if (t == NULL || *t == '#')
continue;
d = strtod(t, &p);
if (p != NULL && *p != '\0')
errx(2, "Invalid data on line %d in %s", line, n);
if (*buf != '\0')
AddPoint(s, d);
}
if (s->n < 3) {
fprintf(stderr,
"Dataset %s must contain at least 3 data points\n", n);
exit (2);
}
qsort(s->points, s->n, sizeof *s->points, dbl_cmp);
return (s);
}
static void
usage(char const *whine)
{
int i;
fprintf(stderr, "%s\n", whine);
fprintf(stderr,
"Usage: ministat [-C column] [-c confidence] [-d delimiter(s)] [-Anqs] [-w width] [file [file ...]]\n");
fprintf(stderr, "\tconfidence = {");
for (i = 0; i < NCONF; i++) {
fprintf(stderr, "%s%g%%",
i ? ", " : "",
studentpct[i]);
}
fprintf(stderr, "}\n");
fprintf(stderr, "\t-A : print statistics only. suppress the graph.\n");
fprintf(stderr, "\t-C : column number to extract (starts and defaults to 1)\n");
fprintf(stderr, "\t-d : delimiter(s) string, default to \" \\t\"\n");
fprintf(stderr, "\t-n : print summary statistics only, no graph/test\n");
fprintf(stderr, "\t-q : suppress printing summary-statistics headers and data-set names\n");
fprintf(stderr, "\t-s : print avg/median/stddev bars on separate lines\n");
fprintf(stderr, "\t-w : width of graph/test output (default 74 or terminal width)\n");
exit (2);
}
int
main(int argc, char **argv)
{
const char *setfilenames[MAX_DS - 1];
struct dataset *ds[MAX_DS - 1];
FILE *setfiles[MAX_DS - 1];
int nds;
double a;
const char *delim = " \t";
char *p;
int c, i, ci;
int column = 1;
int flag_s = 0;
int flag_n = 0;
int flag_q = 0;
int termwidth = 74;
int suppress_plot = 0;
if (isatty(STDOUT_FILENO)) {
struct winsize wsz;
if ((p = getenv("COLUMNS")) != NULL && *p != '\0')
termwidth = atoi(p);
else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &wsz) != -1 &&
wsz.ws_col > 0)
termwidth = wsz.ws_col - 2;
}
ci = -1;
while ((c = getopt(argc, argv, "AC:c:d:snqw:")) != -1)
switch (c) {
case 'A':
suppress_plot = 1;
break;
case 'C':
column = strtol(optarg, &p, 10);
if (p != NULL && *p != '\0')
usage("Invalid column number.");
if (column <= 0)
usage("Column number should be positive.");
break;
case 'c':
a = strtod(optarg, &p);
if (p != NULL && *p != '\0')
usage("Not a floating point number");
for (i = 0; i < NCONF; i++)
if (a == studentpct[i])
ci = i;
if (ci == -1)
usage("No support for confidence level");
break;
case 'd':
if (*optarg == '\0')
usage("Can't use empty delimiter string");
delim = optarg;
break;
case 'n':
flag_n = 1;
break;
case 'q':
flag_q = 1;
break;
case 's':
flag_s = 1;
break;
case 'w':
termwidth = strtol(optarg, &p, 10);
if (p != NULL && *p != '\0')
usage("Invalid width, not a number.");
if (termwidth < 0)
usage("Unable to move beyond left margin.");
break;
default:
usage("Unknown option");
break;
}
if (ci == -1)
ci = 2;
argc -= optind;
argv += optind;
if (argc == 0) {
setfilenames[0] = "<stdin>";
setfiles[0] = stdin;
nds = 1;
} else {
if (argc > (MAX_DS - 1))
usage("Too many datasets.");
nds = argc;
for (i = 0; i < nds; i++) {
setfilenames[i] = argv[i];
if (!strcmp(argv[i], "-"))
setfiles[0] = stdin;
else
setfiles[i] = fopen(argv[i], "r");
if (setfiles[i] == NULL)
err(2, "Cannot open %s", argv[i]);
}
}
if (caph_limit_stdio() < 0)
err(2, "capsicum");
for (i = 0; i < nds; i++)
if (caph_limit_stream(fileno(setfiles[i]), CAPH_READ) < 0)
err(2, "unable to limit rights for %s",
setfilenames[i]);
/* Enter Capsicum sandbox. */
if (caph_enter() < 0)
err(2, "unable to enter capability mode");
for (i = 0; i < nds; i++) {
ds[i] = ReadSet(setfiles[i], setfilenames[i], column, delim);
if (setfiles[i] != stdin)
fclose(setfiles[i]);
}
if (!flag_q) {
for (i = 0; i < nds; i++)
printf("%c %s\n", symbol[i+1], ds[i]->name);
}
if (!flag_n && !suppress_plot) {
SetupPlot(termwidth, flag_s, nds);
for (i = 0; i < nds; i++)
DimPlot(ds[i]);
for (i = 0; i < nds; i++)
PlotSet(ds[i], i + 1);
DumpPlot();
}
if (!flag_q)
VitalsHead();
Vitals(ds[0], 1);
for (i = 1; i < nds; i++) {
Vitals(ds[i], i + 1);
if (!flag_n)
Relative(ds[i], ds[0], ci);
}
exit(0);
}
plain