99 lines
2 KiB
C
99 lines
2 KiB
C
/* list.c - grub list function */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/list.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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void
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grub_list_push (grub_list_t *head, grub_list_t item)
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{
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item->next = *head;
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*head = item;
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}
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void *
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grub_list_pop (grub_list_t *head)
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{
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grub_list_t item;
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item = *head;
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if (item)
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*head = item->next;
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return item;
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}
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void
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grub_list_remove (grub_list_t *head, grub_list_t item)
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{
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grub_list_t *p, q;
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for (p = head, q = *p; q; p = &(q->next), q = q->next)
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if (q == item)
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{
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*p = q->next;
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break;
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}
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}
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void *
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grub_named_list_find (grub_named_list_t head, const char *name)
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{
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grub_named_list_t item;
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FOR_LIST_ELEMENTS (item, head)
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if (grub_strcmp (item->name, name) == 0)
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return item;
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return NULL;
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}
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void
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grub_prio_list_insert (grub_prio_list_t *head, grub_prio_list_t nitem)
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{
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int inactive = 0;
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grub_prio_list_t *p, q;
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for (p = head, q = *p; q; p = &(q->next), q = q->next)
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{
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int r;
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r = grub_strcmp (nitem->name, q->name);
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if (r < 0)
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break;
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if (r > 0)
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continue;
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if (nitem->prio >= (q->prio & GRUB_PRIO_LIST_PRIO_MASK))
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{
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q->prio &= ~GRUB_PRIO_LIST_FLAG_ACTIVE;
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break;
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}
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inactive = 1;
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}
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*p = nitem;
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nitem->next = q;
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if (! inactive)
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nitem->prio |= GRUB_PRIO_LIST_FLAG_ACTIVE;
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}
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