Mercurial > hg > toybox
view toys/other/rev.c @ 1776:7bf68329eb3b draft default tip
Repository switched to git at https://github.com/landley/toybox
author | Rob Landley <rob@landley.net> |
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date | Thu, 09 Apr 2015 02:28:32 -0500 |
parents | c42f64ea297d |
children |
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/* rev.c - reverse lines of a set of given input files * * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com> USE_REV(NEWTOY(rev, NULL, TOYFLAG_USR|TOYFLAG_BIN)) config REV bool "rev" default y help usage: rev [FILE...] Output each line reversed, when no files are given stdin is used. */ #include "toys.h" void do_rev(int fd, char *name) { char *c; for (;;) { int len, i; if (!(c = get_line(fd))) break; len = strlen(c) - 1; for (i = 0; i <= len/2; i++) { char tmp = c[i]; c[i] = c[len-i]; c[len-i] = tmp; } xputs(c); free(c); } } void rev_main(void) { loopfiles(toys.optargs, do_rev); }