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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2009-2025 Free Software Foundation, Inc.
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 3 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 <http://www.gnu.org/licenses/>. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <mailutils/alloc.h>
#include <mailutils/util.h>
/*
* Given directory name DIR, file name FILE and optional suffix SUF,
* return full pathname composed from these three. In the resulting
* string, DIR and FILE are separated by exactly one '/', unless DIR
* is one or more '/' characters, in which case the two strings are
* simply concatenated. If SUF is supplied, it is appended to the
* resulting string without additional separators.
*
* Corner cases:
* all three arguments are NULL or empty
* Return NULL and set errno to EINVAL.
* dir is NULL
* Return FILE and SUF concatenated.
* dir is a sequence of one or more '/'
* Return concatenation of arguments.
* file is NULL, suf is not NULL
* Same as mu_make_file_name_suf(dir, suf, NULL);
* file is NULL, suf is NULL
* Return allocated copy of DIR.
*/
#define DIRSEP '/'
char *
mu_make_file_name_suf (const char *dir, const char *file, const char *suf)
{
char *tmp;
size_t dirlen, suflen, fillen;
size_t len;
int sep = 0;
dirlen = dir ? strlen (dir) : 0;
fillen = file ? strlen (file) : 0;
suflen = suf ? strlen (suf) : 0;
len = suflen + fillen;
if (dirlen == 0)
{
if (len == 0)
{
errno = EINVAL;
return NULL;
}
}
else
{
int i = 0;
if (len)
sep = DIRSEP;
if (dir[0] == DIRSEP)
{
for (i = 0; dir[i+1] == DIRSEP; i++);
sep = DIRSEP;
}
while (dirlen > i && dir[dirlen-1] == DIRSEP)
dirlen--;
}
len += dirlen;
if (sep)
len++;
tmp = malloc (len + 1);
if (tmp)
{
if (dir)
memcpy (tmp, dir, dirlen);
if (sep)
tmp[dirlen++] = sep;
if (fillen)
memcpy (tmp + dirlen, file, fillen);
if (suflen)
memcpy (tmp + dirlen + fillen, suf, suflen);
tmp[len] = 0;
}
return tmp;
}
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