diff options
Diffstat (limited to 'grub-core/kern/list.c')
-rw-r--r-- | grub-core/kern/list.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/grub-core/kern/list.c b/grub-core/kern/list.c new file mode 100644 index 0000000..33c3341 --- /dev/null +++ b/grub-core/kern/list.c @@ -0,0 +1,87 @@ +/* list.c - grub list function */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/list.h> +#include <grub/misc.h> +#include <grub/mm.h> + +void +grub_list_push (grub_list_t *head, grub_list_t item) +{ + item->next = *head; + *head = item; +} + +void +grub_list_remove (grub_list_t *head, grub_list_t item) +{ + grub_list_t *p, q; + + for (p = head, q = *p; q; p = &(q->next), q = q->next) + if (q == item) + { + *p = q->next; + break; + } +} + +void * +grub_named_list_find (grub_named_list_t head, const char *name) +{ + grub_named_list_t item; + + FOR_LIST_ELEMENTS (item, head) + if (grub_strcmp (item->name, name) == 0) + return item; + + return NULL; +} + +void +grub_prio_list_insert (grub_prio_list_t *head, grub_prio_list_t nitem) +{ + int inactive = 0; + + grub_prio_list_t *p, q; + + for (p = head, q = *p; q; p = &(q->next), q = q->next) + { + int r; + + r = grub_strcmp (nitem->name, q->name); + if (r < 0) + break; + if (r > 0) + continue; + + if (nitem->prio >= (q->prio & GRUB_PRIO_LIST_PRIO_MASK)) + { + q->prio &= ~GRUB_PRIO_LIST_FLAG_ACTIVE; + break; + } + + inactive = 1; + } + + *p = nitem; + nitem->next = q; + + if (! inactive) + nitem->prio |= GRUB_PRIO_LIST_FLAG_ACTIVE; +} |