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Diffstat (limited to 'src/common/util-common.c')
-rw-r--r-- | src/common/util-common.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/common/util-common.c b/src/common/util-common.c new file mode 100644 index 00000000..e2b5939c --- /dev/null +++ b/src/common/util-common.c @@ -0,0 +1,109 @@ +/* + * util-common.c + * + * Copyright (c) 2006-2012 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 ts=2 sw=2 noet: */ |