diff options
author | Jim Meyering <jim@meyering.net> | 2007-08-08 06:43:35 +0000 |
---|---|---|
committer | Jim Meyering <jim@meyering.net> | 2007-08-08 06:43:35 +0000 |
commit | fe32d83182dd651bbdaee9a8b6a54c6e3ad9ad2e (patch) | |
tree | 10e35dd2095289b0c059a366df2b9c002fe48543 /lib | |
parent | a29314f1739b34cb7653f4140c7cff368de86ead (diff) | |
download | gnulib-fe32d83182dd651bbdaee9a8b6a54c6e3ad9ad2e.tar.gz |
New function: mfile_name_concat.
* lib/filenamecat.c (mfile_name_concat): New function, just like
file_name_concat, but return NULL upon failure rather than exiting
with a diagnostic.
* lib/filenamecat.h: Declare it.
Diffstat (limited to 'lib')
-rw-r--r-- | lib/filenamecat.c | 26 | ||||
-rw-r--r-- | lib/filenamecat.h | 5 |
2 files changed, 25 insertions, 6 deletions
diff --git a/lib/filenamecat.c b/lib/filenamecat.c index bccffb25d8..beac5c1853 100644 --- a/lib/filenamecat.c +++ b/lib/filenamecat.c @@ -1,7 +1,6 @@ /* 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 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 @@ -24,6 +23,7 @@ /* Specification. */ #include "filenamecat.h" +#include <stdlib.h> #include <string.h> #include "dirname.h" @@ -57,10 +57,10 @@ longest_relative_suffix (char const *f) 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. */ + Return NULL if malloc fails. */ char * -file_name_concat (char const *dir, char const *abase, char **base_in_result) +mfile_name_concat (char const *dir, char const *abase, char **base_in_result) { char const *dirbase = last_component (dir); size_t dirbaselen = base_len (dirbase); @@ -70,9 +70,12 @@ file_name_concat (char const *dir, char const *abase, char **base_in_result) char const *base = longest_relative_suffix (abase); size_t baselen = strlen (base); - char *p_concat = xmalloc (dirlen + needs_separator + baselen + 1); + char *p_concat = malloc (dirlen + needs_separator + baselen + 1); char *p; + if (p_concat == NULL) + return NULL; + p = mempcpy (p_concat, dir, dirlen); *p = DIRECTORY_SEPARATOR; p += needs_separator; @@ -86,6 +89,19 @@ file_name_concat (char const *dir, char const *abase, char **base_in_result) return p_concat; } +/* Just like mfile_name_concat, above, 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 *p = mfile_name_concat (dir, abase, base_in_result); + if (p == NULL) + xalloc_die (); + return p; +} + #ifdef TEST_FILE_NAME_CONCAT # include <stdlib.h> # include <stdio.h> diff --git a/lib/filenamecat.h b/lib/filenamecat.h index c943b67d77..28f8c3fb3c 100644 --- a/lib/filenamecat.h +++ b/lib/filenamecat.h @@ -1,6 +1,6 @@ /* Concatenate two arbitrary file names. - Copyright (C) 1996, 1997, 2003, 2005 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 2003, 2005, 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 @@ -20,3 +20,6 @@ char *file_name_concat (char const *dir, char const *base, char **base_in_result); + +char *mfile_name_concat (char const *dir, char const *base, + char **base_in_result); |