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	blind-split-cols.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	blind-split-cols.c (1171B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "common.h"
	3
	4 USAGE("(file columns) ...")
	5
	6 int
	7 main(int argc, char *argv[])
	8 {
	9 struct stream stream;
	10 size_t *cols, period = 0, parts, i;
	11 int *fds;
	12
	13 UNOFLAGS(argc % 2 \|\| !argc);
	14
	15 eopen_stream(&stream, NULL);
	16
	17 parts = (size_t)argc / 2;
	18 cols = alloca(parts * sizeof(*cols));
	19 fds = alloca(parts * sizeof(*fds));
	20
	21 for (i = 0; i < parts; i++) {
	22 fds[i] = eopen(argv[i * 2], O_WRONLY \| O_CREAT \| O_TRUNC…
	23 cols[i] = etozu_arg("columns", argv[i * 2 + 1], 1, SIZE_…
	24 }
	25 for (i = 0; i < parts; i++) {
	26 if (cols[i] > SIZE_MAX - period)
	27 goto bad_col_count;
	28 period += cols[i];
	29 }
	30 if (period != stream.width)
	31 goto bad_col_count;
	32
	33 for (i = 0; i < parts; i++)
	34 if (DPRINTF_HEAD(fds[i], stream.frames, cols[i], stream.…
	35 eprintf("dprintf %s:", argv[i * 2]);
	36 for (i = 0; i < parts; i++, i = i == parts ? 0 : i)
	37 if (esend_pixels(&stream, fds[i], cols[i], argv[i * 2]) …
	38 break;
	39 for (i = 0; i < parts; i++)
	40 close(fds[i]);
	41
	42 return 0;
	43
	44 bad_col_count:
	45 eprintf("the sum of all columns must add up to the width of the …
	46 return 1;
	47 }