git ssb

1
#define _POSIX_SOURCE
2
#include <err.h>
3
#include <fcntl.h>
4
#include <stdio.h>
5
#include <stdlib.h>
6
#include <string.h>
7
#include <unistd.h>
8
9
#include "pngspark.h"
10
11
char float_chars[(unsigned char)-1] = {
12
	['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
13
	['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
14
	['.'] = 1, ['-'] = 1, ['e'] = 1, ['E'] = 1, 0
15
};
16
17
int main(int argc, char *argv[])
18
{
19
	struct pngspark ps;
20
	const char *color = "#000000";
21
	const char *filename = "pngspark.png";
22
	double scaling = 0.8;
23
	int height = 10;
24
25
	for (int i = 1; i < argc; i++) {
26
		if (argv[i][0] != '-') continue;
27
		if (argv[i][1] == '-') {
28
			if (!strcmp("help", argv[i]+2)) {
29
				errx(1, "Usage: %s [--help] [-h height] "
30
						"[-o output.png] [-c color] [-s scale_min]", argv[0]);
31
			}
32
		} else if (!argv[i][2]) switch (argv[i][1]) {
33
			case 'c':
34
				if (++i < argc) color = argv[i];
35
				break;
36
			case 'o':
37
				if (++i < argc) filename = argv[i];
38
				break;
39
			case 'h':
40
				if (++i < argc) height = atoi(argv[i]);
41
				break;
42
			case 's':
43
				if (++i < argc) scaling = atof(argv[i]);
44
				break;
45
		}
46
	}
47
48
	FILE *file = fopen(filename, "w");
49
	if (!file) err(1, "unable to open file %s", filename);
50
51
	if (pngspark_init(&ps, height, color, scaling) < 0)
52
		return 1;
53
54
	char c;
55
	char buffer[32];
56
	do {
57
		unsigned int i = 0;
58
		for (c = getchar(); float_chars[(unsigned char)c]; c = getchar())
59
			if (i >= sizeof buffer) {
60
				warnx("number too big: %.*s\n", (int)(sizeof buffer), buffer);
61
				break;
62
			} else
63
				buffer[i++] = c;
64
		if (!i) continue;
65
		buffer[i] = '\0';
66
		double value = atof(buffer);
67
		if (pngspark_append(&ps, value) < 0)
68
			return 1;
69
	} while (c != EOF);
70
71
	if (pngspark_write(&ps, file) < 0)
72
		return 1;
73
74
	if (pngspark_end(&ps) < 0)
75
		return 1;
76
77
	if (fclose(file) < 0)
78
		err(1, "close %s", filename);
79
80
	return 0;
81
}
82