/* xdirname.c: return the directory part of a path. Copyright 1999, 2008, 2011, 2016, 2017 Karl Berry. Copyright 2005 Olaf Weber. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, see . */ /* Return directory for NAME. This is "." if NAME contains no directory separators (should never happen for selfdir), else whatever precedes the final directory separator, but with multiple separators stripped. For example, `xdirname ("/foo//bar.baz")' returns "/foo". Always return a new string. */ #include #include string xdirname (const_string name) { string ret; unsigned limit = 0, loc; #if defined(WIN32) string p; #endif /* Ignore a NULL name. */ if (!name) return NULL; if (NAME_BEGINS_WITH_DEVICE(name)) { limit = 2; } else if (IS_UNC_NAME(name)) { for (limit = 2; name[limit] && !IS_DIR_SEP (name[limit]); limit++) ; if (name[limit++] && name[limit] && !IS_DIR_SEP (name[limit])) { for (; name[limit] && !IS_DIR_SEP (name[limit]); limit++) ; limit--; } else /* malformed UNC name, backup */ limit = 0; } #if defined(WIN32) && defined (KPSE_COMPAT_API) for (loc = strlen (name); loc > limit && (!IS_DIR_SEP (name[loc-1]) || (loc > 1 && IS_KANJI(name+loc-2))); loc--) ; #else for (loc = strlen (name); loc > limit && !IS_DIR_SEP (name[loc-1]); loc--) ; #endif if (loc == limit) { if (limit == 0) ret = xstrdup ("."); else if (limit == 2) { ret = (string)xmalloc(4); ret[0] = name[0]; ret[1] = name[1]; ret[2] = '.'; ret[3] = '\0'; } else { /* UNC name is "//server/share". */ ret = xstrdup (name); } } else { /* If have ///a, must return /, so don't strip off everything. */ #if defined(WIN32) && defined (KPSE_COMPAT_API) while (loc > limit+1 && IS_DIR_SEP (name[loc-1])) { if (loc > 1 && IS_KANJI(name+loc-2)) break; loc--; } #else while (loc > limit+1 && IS_DIR_SEP (name[loc-1])) { loc--; } #endif ret = (string)xmalloc(loc+1); strncpy(ret, name, loc); ret[loc] = '\0'; } #if defined(WIN32) for (p = ret; *p; p++) { if (*p == '\\') *p = '/'; #if defined (KPSE_COMPAT_API) else if (IS_KANJI(p)) p++; #endif } #endif return ret; }