1 /* 2 * busybox library eXtended function 3 * 4 * Copyright (C) 2001 Larry Doolittle, <ldoolitt@recycle.lbl.gov> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <string.h> 23 #include "libbb.h" 24 25 /* Find out if the last character of a string matches the one given Don't 26 * underrun the buffer if the string length is 0. Also avoids a possible 27 * space-hogging inline of strlen() per usage. 28 */ 29 char *last_char_is(const char *s, int c) 30 { 31 char *sret; 32 if (!s) 33 return NULL; 34 sret = (char *)s + strlen(s) - 1; 35 if (sret >= s && *sret == c) { 36 return sret; 37 } else { 38 return NULL; 39 } 40 } 41
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