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(vfs_path_get_by_index): set errno, update description.

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Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
This commit is contained in:
Andrew Borodin 2022-05-07 11:02:24 +03:00
parent 666586e41a
commit bae8fe0af0
1 changed files with 22 additions and 7 deletions
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29
lib/vfs/path.c
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@ -6,7 +6,7 @@
Written by:
Slava Zanko <slavazanko@gmail.com>, 2011, 2013
Andrew Borodin <aborodin@vmail.ru>, 2013
Andrew Borodin <aborodin@vmail.ru>, 2013-2022
This file is part of the Midnight Commander.
@ -34,6 +34,8 @@
#include <config.h>
#include <errno.h>
#include "lib/global.h"
#include "lib/strutil.h"
#include "lib/util.h" /* mc_build_filename() */
@ -815,23 +817,36 @@ vfs_path_add_element (vfs_path_t * vpath, const vfs_path_element_t * path_elemen
/*
* Get one path element by index.
*
* @param vpath pointer to vfs_path_t object
* @param element_index element index. May have negative value (in this case count was started at the end of list).
* @param vpath pointer to vfs_path_t object.
* May be NULL. In this case NULL is returned and errno set to 0.
* @param element_index element index. May have negative value (in this case count was started at
* the end of list). If @element_index is out of range, NULL is returned and
* errno set to EINVAL.
*
* @return path element.
* @return path element
*/
const vfs_path_element_t *
vfs_path_get_by_index (const vfs_path_t * vpath, int element_index)
{
int n;
if (vpath == NULL)
{
errno = 0;
return NULL;
}
n = vfs_path_elements_count (vpath);
if (element_index < 0)
element_index += vfs_path_elements_count (vpath);
element_index += n;
if (element_index < 0)
vfs_die ("vfs_path_get_by_index: incorrect index!");
if (element_index < 0 || element_index > n)
{
errno = EINVAL;
return NULL;
}
return g_array_index (vpath->path, vfs_path_element_t *, element_index);
}