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Diffstat (limited to 'lib/concatpath.c')
-rw-r--r-- | lib/concatpath.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/concatpath.c b/lib/concatpath.c new file mode 100644 index 0000000000..716d2f5d46 --- /dev/null +++ b/lib/concatpath.c @@ -0,0 +1,71 @@ +/* Construct a full pathname from a directory and a filename. + Copyright (C) 2001-2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + USA. */ + +/* Written by Bruno Haible <haible@clisp.cons.org>. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +/* Specification. */ +#include "pathname.h" + +#include <string.h> + +#include "xalloc.h" +#include "stpcpy.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 = (char *) xmalloc (strlen (filename) + + (suffix != NULL ? strlen (suffix) : 0) + + 1); + p = result; + } + else + { + size_t directory_len = strlen (directory); + int need_slash = + (directory_len > FILESYSTEM_PREFIX_LEN (directory) + && !ISSLASH (directory[directory_len - 1])); + result = (char *) xmalloc (directory_len + need_slash + + strlen (filename) + + (suffix != NULL ? strlen (suffix) : 0) + + 1); + 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; +} |