/* Construct a full pathname from a directory and a filename. Copyright (C) 2001-2004, 2006, 2007 Free Software Foundation, Inc. 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, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* Written by Bruno Haible . */ #include /* Specification. */ #include "pathname.h" #include #include "xalloc.h" /* Concatenate a directory pathname, a relative pathname and an optional suffix. The directory may end with the directory separator. The second argument may not start with the directory separator (it is relative). Return a freshly allocated pathname. */ char * concatenated_pathname (const char *directory, const char *filename, const char *suffix) { char *result; char *p; if (strcmp (directory, ".") == 0) { /* No need to prepend the directory. */ result = XNMALLOC (strlen (filename) + (suffix != NULL ? strlen (suffix) : 0) + 1, char); p = result; } else { size_t directory_len = strlen (directory); int need_slash = (directory_len > FILE_SYSTEM_PREFIX_LEN (directory) && !ISSLASH (directory[directory_len - 1])); result = XNMALLOC (directory_len + need_slash + strlen (filename) + (suffix != NULL ? strlen (suffix) : 0) + 1, char); memcpy (result, directory, directory_len); p = result + directory_len; if (need_slash) *p++ = '/'; } p = stpcpy (p, filename); if (suffix != NULL) stpcpy (p, suffix); return result; }