index : pacman | |
Archlinux32 fork of pacman | gitolite user |
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-rw-r--r-- | lib/libalpm/alpm_list.c | 18 |
diff --git a/lib/libalpm/alpm_list.c b/lib/libalpm/alpm_list.c index c2b30adc..1976e13d 100644 --- a/lib/libalpm/alpm_list.c +++ b/lib/libalpm/alpm_list.c @@ -556,6 +556,24 @@ inline alpm_list_t SYMEXPORT *alpm_list_next(const alpm_list_t *node) } /** + * @brief Get the previous element of a list. + * + * @param list the list head + * @param node the list node + * + * @return the previous element, or NULL when no previous element exist + */ +inline alpm_list_t SYMEXPORT *alpm_list_previous(const alpm_list_t *list, + const alpm_list_t *node) +{ + if(node && node != list) { + return node->prev; + } else { + return NULL; + } +} + +/** * @brief Get the last item in the list. * * @param list the list |