From 014e4c306c4765c65abf1f2ce879bebcdd8c7261 Mon Sep 17 00:00:00 2001 From: ticktock35 Date: Mon, 15 Dec 2008 00:32:34 -0500 Subject: opkg: implement active_list_prev and test cases. git-svn-id: http://opkg.googlecode.com/svn/trunk@169 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358 --- (limited to 'libopkg') diff --git a/libopkg/active_list.c b/libopkg/active_list.c index 800915d..e297cfc 100644 --- a/libopkg/active_list.c +++ b/libopkg/active_list.c @@ -30,26 +30,47 @@ void active_list_init(struct active_list *ptr) { */ struct active_list * active_list_next(struct active_list *head, struct active_list *ptr) { struct active_list *next=NULL; - if (!head) { - fprintf(stderr, "active_list_prev head = %p, ptr = %p invalid value!!\n", head, ptr); + if ( !head ) { + fprintf(stderr, "active_list_next head = %p, ptr = %p invalid value!!\n", head, ptr); return NULL; } - if (!ptr) + if ( !ptr ) ptr = head; next = list_entry(ptr->node.next, struct active_list, node); - if (next == head ) { + if ( next == head ) { return NULL; } - if (ptr->depended && &ptr->depended->depend == ptr->node.next ) { + if ( ptr->depended && &ptr->depended->depend == ptr->node.next ) { return ptr->depended; } - while (next->depend.next != &next->depend) { + while ( next->depend.next != &next->depend ) { next = list_entry(next->depend.next, struct active_list, node); } return next; } +struct active_list * active_list_prev(struct active_list *head, struct active_list *ptr) { + struct active_list *prev=NULL; + if ( !head ) { + fprintf(stderr, "active_list_prev head = %p, ptr = %p invalid value!!\n", head, ptr); + return NULL; + } + if ( !ptr ) + ptr = head; + if ( ptr->depend.prev != &ptr->depend ) { + prev = list_entry(ptr->depend.prev, struct active_list, node); + return prev; + } + if ( ptr->depended && ptr->depended != head && &ptr->depended->depend == ptr->node.prev ) { + prev = list_entry(ptr->depended->node.prev, struct active_list, node); + } else + prev = list_entry(ptr->node.prev, struct active_list, node); + if ( prev == head ) + return NULL; + return prev; +} + void active_list_clear(struct active_list *head) { } diff --git a/libopkg/active_list.h b/libopkg/active_list.h index 79ab77d..262164a 100644 --- a/libopkg/active_list.h +++ b/libopkg/active_list.h @@ -26,10 +26,13 @@ struct active_list { struct active_list *depended; }; -struct active_list * active_list_next(struct active_list *head, struct active_list *ptr); void active_list_init(struct active_list *ptr); void active_list_clear(struct active_list *head); void active_list_add_depend(struct active_list *node, struct active_list *depend); void active_list_add(struct active_list *head, struct active_list *node); +struct active_list * active_list_next(struct active_list *head, struct active_list *ptr); + +struct active_list * active_list_prev(struct active_list *head, struct active_list *ptr); + #endif -- cgit v0.9.1