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	blind-split.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	---
	blind-split.c (1622B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "common.h"
	3
	4 USAGE("[-L] (file (end-point \| 'end')) ...")
	5
	6 int
	7 main(int argc, char *argv[])
	8 {
	9 struct stream stream;
	10 size_t *ends, i, parts, n;
	11 char *to_end;
	12 FILE *fp;
	13 int fd, unknown_length = 0;
	14
	15 ARGBEGIN {
	16 case 'L':
	17 unknown_length = 1;
	18 break;
	19 default:
	20 usage();
	21 } ARGEND;
	22
	23 if (argc % 2 \|\| !argc)
	24 usage();
	25
	26 eopen_stream(&stream, NULL);
	27 echeck_dimensions(&stream, WIDTH \| HEIGHT, NULL);
	28
	29 parts = (size_t)argc / 2;
	30 ends = alloca(parts * sizeof(*ends));
	31 to_end = alloca(parts);
	32
	33 for (i = 0; i < parts; i++) {
	34 if ((to_end[i] = !strcmp(argv[i * 2 + 1], "end")))
	35 ends[i] = unknown_length ? SIZE_MAX : stream.fra…
	36 else if (tozu(argv[i * 2 + 1], 0, SIZE_MAX, ends + i))
	37 eprintf("the end point must be an integer in [0,…
	38
	39 if (i && ends[i] <= ends[i - 1])
	40 eprintf("the end points must be in strictly asce…
	41 if (!unknown_length && ends[i] > stream.frames)
	42 eprintf("frame %zu is beyond the end of the vide…
	43 }
	44
	45 for (i = 0; i < parts; i++) {
	46 fd = eopen(argv[i * 2], O_WRONLY \| O_CREAT \| O_TRUNC, 06…
	47 if (!(fp = fdopen(fd, "wb")))
	48 eprintf("fdopen %s:", argv[i * 2]);
	49
	50 n = ends[i] - (i ? ends[i - 1] : 0);
	51 stream.frames = (to_end[i] && unknown_length) ? 0 : n;
	52 fprint_stream_head(fp, &stream);
	53 efflush(fp, argv[i * 2]);
	54
	55 if (esend_frames(&stream, fd, n, argv[i * 2]) != n)
	56 if (!unknown_length \|\| !to_end[i])
	57 eprintf("%s: file is shorter than expect…
	58
	59 if (fclose(fp))
	60 eprintf("%s:", argv[i * 2]);
	61 close(fd);
	62 }
	63
	64 return 0;
	65 }