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cel / pngspark



Commit 7d1b2f8dab921f01fb353d94728ca41743b71b63

Browse Files

Initial commit

Charles Lehner committed on 2/9/2015, 10:29:39 PM

Files changed

.gitignoreadded
Makefileadded
main.cadded
package.jsonadded
pngspark.cadded
pngspark.hadded
.gitignoreView
@@ -1,0 +1,2 @@
1 …+*.o
2 …+pngspark
MakefileView
@@ -1,0 +1,21 @@
1 …+SRC = $(wildcard *.c)
2 …+OBJ = $(SRC:c=o)
3 …+BIN = pngspark
4 …+PREFIX ?= /usr/local
5 …+
6 …+CFLAGS = -Wall -Wextra -Werror -O2 -std=c99 -pedantic
7 …+
8 …+all: $(BIN)
9 …+
10 …+pngspark: pngspark.o main.o
11 …+
12 …+install: $(BIN)
13 …+ cp -f $(BIN) $(PREFIX)/bin/$(BIN)
14 …+
15 …+uninstall:
16 …+ rm $(PREFIX)/bin/$(BIN)
17 …+
18 …+clean:
19 …+ rm -f test $(BIN) $(OBJ)
20 …+
21 …+.PHONY: clean install uninstall
main.cView
@@ -1,0 +1,75 @@
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 …+ if (isatty(fileno(stdin)) && (argc < 2 ||
20 …+ !strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))) {
21 …+ return 1;
22 …+ }
23 …+
24 …+ struct pngspark ps;
25 …+ const char *color = "#000000";
26 …+ const char *filename = "pngspark.png";
27 …+ int height = 10;
28 …+
29 …+ for (int i = 1; i < argc; i++) {
30 …+ char c = argv[i][1];
31 …+ if(argv[i][0] != '-' || argv[i][2])
32 …+ c = -1;
33 …+ switch(c) {
34 …+ case 'c':
35 …+ if (++i < argc) color = argv[i];
36 …+ break;
37 …+ case 'f':
38 …+ if (++i < argc) filename = argv[i];
39 …+ break;
40 …+ case 'h':
41 …+ if (++i < argc) height = atoi(argv[i]);
42 …+ break;
43 …+ default:
44 …+ fprintf(stderr, "Usage: %s [-h|--help] VALUE,...\n", argv[0]);
45 …+ }
46 …+ }
47 …+
48 …+ int fd = open(filename, O_CREAT | O_RDWR, 0644);
49 …+ if (!fd) err(1, "unable to open file %s", filename);
50 …+
51 …+ if (pngspark_init(&ps, fd, height, color) < 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_end(&ps) < 0)
72 …+ return 1;
73 …+
74 …+ return 0;
75 …+}
package.jsonView
@@ -1,0 +1,9 @@
1 …+{
2 …+ "name": "pngspark",
3 …+ "version": "0.0.1",
4 …+ "repo": "clehner/pngspark",
5 …+ "description": "sparkline PNG images",
6 …+ "keywords": ["spark", "chart", "stats", "sparkline", "image", "png"],
7 …+ "license": "MIT",
8 …+ "install": "make install"
9 …+}
pngspark.cView
@@ -1,0 +1,23 @@
1 …+#include "pngspark.h"
2 …+
3 …+int pngspark_init(struct pngspark *ps, int fd, int height, const char *color)
4 …+{
5 …+ ps->fd = fd;
6 …+ ps->height = height;
7 …+ (void)color;
8 …+ return 0;
9 …+}
10 …+
11 …+int pngspark_append(struct pngspark *ps, double value)
12 …+{
13 …+ (void)ps;
14 …+ (void)value;
15 …+ return 0;
16 …+}
17 …+
18 …+int pngspark_end(struct pngspark *ps)
19 …+{
20 …+ (void)ps;
21 …+ return 0;
22 …+}
23 …+
pngspark.hView
@@ -1,0 +1,13 @@
1 …+#ifndef __PNGSPARK_H
2 …+#define __PNGSPARK_H
3 …+
4 …+struct pngspark {
5 …+ int fd;
6 …+ int height;
7 …+};
8 …+
9 …+int pngspark_init(struct pngspark *, int, int, const char *);
10 …+int pngspark_append(struct pngspark *, double);
11 …+int pngspark_end(struct pngspark *);
12 …+
13 …+#endif /* __PNGSPARK_H */

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