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/* See LICENSE file for copyright and license details. */
#include "arg.h"
#include "util.h"
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define eprintf(...) enprintf(2, __VA_ARGS__)
static void
usage(void)
{
eprintf("usage: %s -w width -h height\n", argv0);
}
int
main(int argc, char *argv[])
{
size_t width = 0, height = 0;
size_t p, n, w, max;
ssize_t r;
char buf[8096];
int anything = 0;
ARGBEGIN {
case 'w':
if (tozu(EARGF(usage()), 1, SIZE_MAX, &width))
eprintf("argument of -w must be an integer in [1, %zu]\n", SIZE_MAX);
break;
case 'h':
if (tozu(EARGF(usage()), 1, SIZE_MAX, &height))
eprintf("argument of -h must be an integer in [1, %zu]\n", SIZE_MAX);
break;
default:
usage();
} ARGEND;
if (!width || !height || argc)
usage();
while (height) {
height--;
for (w = width << 2; w;) {
max = sizeof(buf) < w ? sizeof(buf) : w;
r = read(STDIN_FILENO, buf, max);
if (r < 0)
eprintf("read <stdin>:");
if (r == 0)
goto done;
anything = 1;
w -= n = (size_t)r;
for (p = 0; p < n;) {
r = write(STDOUT_FILENO, buf + p, n - p);
if (r < 0)
eprintf("write <stdin>:");
p += (size_t)r;
}
}
}
done:
if (height || w)
eprintf("incomplete frame\n");
return !anything;
}
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