/* * util-common.c * * Copyright (c) 2006-2014 Pacman Development Team <pacman-dev@archlinux.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <stdlib.h> #include <string.h> #include "util-common.h" /** Parse the basename of a program from a path. * @param path path to parse basename from * * @return everything following the final '/' */ const char *mbasename(const char *path) { const char *last = strrchr(path, '/'); if(last) { return last + 1; } return path; } /** Parse the dirname of a program from a path. * The path returned should be freed. * @param path path to parse dirname from * * @return everything preceding the final '/' */ char *mdirname(const char *path) { char *ret, *last; /* null or empty path */ if(path == NULL || *path == '\0') { return strdup("."); } if((ret = strdup(path)) == NULL) { return NULL; } last = strrchr(ret, '/'); if(last != NULL) { /* we found a '/', so terminate our string */ if(last == ret) { /* return "/" for root */ last++; } *last = '\0'; return ret; } /* no slash found */ free(ret); return strdup("."); } #ifndef HAVE_STRNDUP /* A quick and dirty implementation derived from glibc */ /** Determines the length of a fixed-size string. * @param s string to be measured * @param max maximum number of characters to search for the string end * @return length of s or max, whichever is smaller */ static size_t strnlen(const char *s, size_t max) { register const char *p; for(p = s; *p && max--; ++p); return (p - s); } /** Copies a string. * Returned string needs to be freed * @param s string to be copied * @param n maximum number of characters to copy * @return pointer to the new string on success, NULL on error */ char *strndup(const char *s, size_t n) { size_t len = strnlen(s, n); char *new = (char *) malloc(len + 1); if(new == NULL) { return NULL; } new[len] = '\0'; return (char *)memcpy(new, s, len); } #endif /* vim: set noet: */