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/* See LICENSE file for copyright and license details. */
#include "stream.h"
#include "util.h"
#include <string.h>
USAGE("(skipped-frames | +included-frames) ...")
static int
process_frame(struct stream *stream, int include)
{
size_t h, n, m;
int anything = 0;
for (h = stream->height; h; h--) {
for (n = stream->row_size; n; n -= m, anything = 1) {
if (!stream->ptr && !eread_stream(stream, n))
goto done;
m = MIN(stream->ptr, n);
if (include)
ewriteall(STDOUT_FILENO, stream->buf, m, "<stdout>");
memmove(stream->buf, stream->buf + m, stream->ptr -= m);
}
}
done:
if (anything && h)
eprintf("%s: is shorter than expected\n", stream->file);
return anything;
}
int
main(int argc, char *argv[])
{
struct stream stream;
int i, include;
size_t f, n, total = 0;
char *includes;
size_t *ns;
UNOFLAGS(!argc);
eopen_stream(&stream, NULL);
includes = emalloc((size_t)argc);
ns = ecalloc((size_t)argc, sizeof(*ns));
for (i = 0; i < argc; i++) {
include = argv[i][0] == '+';
n = etozu_arg(include ? "included frame count" : "skipped frame count",
argv[i] + include, 0, SIZE_MAX);
total += ns[i] = n;
includes[i] = (char)include;
}
if (!total)
eprintf("null pattern is not allowed");
for (i = 0, total = 0, f = stream.frames; f; i = (i + 1) % argc) {
include = (int)includes[i];
for (n = ns[i]; n-- && f--;)
total += (size_t)include;
}
stream.frames = total;
echeck_dimensions(&stream, WIDTH, NULL);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
for (i = 0;; i = (i + 1) % argc) {
include = (int)includes[i];
for (n = ns[i]; n--;)
if (!process_frame(&stream, include))
goto done;
}
done:
free(includes);
free(ns);
return 0;
}
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