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	blind-flop.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	blind-flop.c (1097B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "common.h"
	3
	4 USAGE("")
	5
	6 static struct stream stream;
	7 static char buf, image;
	8 static size_t n, m, ps;
	9
	10 #define PROCESS(TYPE)\
	11 do {\
	12 size_t i, j;\
	13 for (i = 0; i < ps; i++)\
	14 for (j = 0; j < n; j += ps)\
	15 ((TYPE )image)[m - j + i] = ((TYPE )bu…
	16 } while (0)
	17
	18 static void process_long(void) {PROCESS(long);}
	19 static void process_char(void) {PROCESS(char);}
	20
	21 int
	22 main(int argc, char *argv[])
	23 {
	24 void (*process)(void) = process_char;
	25
	26 UNOFLAGS(argc);
	27
	28 eopen_stream(&stream, NULL);
	29 echeck_dimensions(&stream, WIDTH, NULL);
	30 fprint_stream_head(stdout, &stream);
	31 efflush(stdout, "<stdout>");
	32 buf = emalloc(stream.row_size);
	33 image = emalloc(stream.row_size);
	34
	35 m = (n = stream.row_size) - (ps = stream.pixel_size);
	36 if (!(stream.pixel_size % sizeof(long))) {
	37 process = process_long;
	38 m /= sizeof(long);
	39 n /= sizeof(long);
	40 ps /= sizeof(long);
	41 }
	42
	43 while (eread_row(&stream, buf)) {
	44 process();
	45 ewriteall(STDOUT_FILENO, image, stream.row_size, "<stdou…
	46 }
	47
	48 free(buf);
	49 free(image);
	50 return 0;
	51 }