diff options
Diffstat (limited to 'lib/filenamecat.c')
| -rw-r--r-- | lib/filenamecat.c | 109 |
1 files changed, 13 insertions, 96 deletions
diff --git a/lib/filenamecat.c b/lib/filenamecat.c index bccffb2..06cfeae 100644 --- a/lib/filenamecat.c +++ b/lib/filenamecat.c @@ -1,12 +1,11 @@ /* Concatenate two arbitrary file names. - Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, - 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 1996-2007, 2009-2016 Free Software Foundation, Inc. - This program is free software; you can redistribute it and/or modify + 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. + the Free Software Foundation; either version 3 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 @@ -14,8 +13,7 @@ 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. */ + along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* Written by Jim Meyering. */ @@ -24,101 +22,20 @@ /* Specification. */ #include "filenamecat.h" +#include <stdlib.h> #include <string.h> -#include "dirname.h" #include "xalloc.h" -#if ! HAVE_MEMPCPY && ! defined mempcpy -# define mempcpy(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N))) -#endif - -/* Return the longest suffix of F that is a relative file name. - If it has no such suffix, return the empty string. */ - -static char const * -longest_relative_suffix (char const *f) -{ - for (f += FILE_SYSTEM_PREFIX_LEN (f); ISSLASH (*f); f++) - continue; - return f; -} - -/* Concatenate two file name components, DIR and ABASE, in - newly-allocated storage and return the result. - The resulting file name F is such that the commands "ls F" and "(cd - DIR; ls BASE)" refer to the same file, where BASE is ABASE with any - file system prefixes and leading separators removed. - Arrange for a directory separator if necessary between DIR and BASE - in the result, removing any redundant separators. - In any case, if BASE_IN_RESULT is non-NULL, set - *BASE_IN_RESULT to point to the copy of ABASE in the returned - concatenation. However, if ABASE begins with more than one slash, - set *BASE_IN_RESULT to point to the sole corresponding slash that - is copied into the result buffer. - - Report an error if memory is exhausted. */ +/* Just like mfile_name_concat (filenamecat-lgpl.c), except, rather than + returning NULL upon malloc failure, here, we report the + "memory exhausted" condition and exit. */ char * file_name_concat (char const *dir, char const *abase, char **base_in_result) { - char const *dirbase = last_component (dir); - size_t dirbaselen = base_len (dirbase); - size_t dirlen = dirbase - dir + dirbaselen; - size_t needs_separator = (dirbaselen && ! ISSLASH (dirbase[dirbaselen - 1])); - - char const *base = longest_relative_suffix (abase); - size_t baselen = strlen (base); - - char *p_concat = xmalloc (dirlen + needs_separator + baselen + 1); - char *p; - - p = mempcpy (p_concat, dir, dirlen); - *p = DIRECTORY_SEPARATOR; - p += needs_separator; - - if (base_in_result) - *base_in_result = p - IS_ABSOLUTE_FILE_NAME (abase); - - p = mempcpy (p, base, baselen); - *p = '\0'; - - return p_concat; -} - -#ifdef TEST_FILE_NAME_CONCAT -# include <stdlib.h> -# include <stdio.h> -int -main () -{ - static char const *const tests[][3] = - { - {"a", "b", "a/b"}, - {"a/", "b", "a/b"}, - {"a/", "/b", "a/b"}, - {"a", "/b", "a/b"}, - - {"/", "b", "/b"}, - {"/", "/b", "/b"}, - {"/", "/", "/"}, - {"a", "/", "a/"}, /* this might deserve a diagnostic */ - {"/a", "/", "/a/"}, /* this might deserve a diagnostic */ - {"a", "//b", "a/b"}, - }; - size_t i; - bool fail = false; - for (i = 0; i < sizeof tests / sizeof tests[0]; i++) - { - char *base_in_result; - char const *const *t = tests[i]; - char *res = file_name_concat (t[0], t[1], &base_in_result); - if (strcmp (res, t[2]) != 0) - { - printf ("got %s, expected %s\n", res, t[2]); - fail = true; - } - } - exit (fail ? EXIT_FAILURE : EXIT_SUCCESS); + char *p = mfile_name_concat (dir, abase, base_in_result); + if (p == NULL) + xalloc_die (); + return p; } -#endif |