mirror of https://gitee.com/openkylin/linux.git
146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Based on intlist.c by:
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* (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <linux/compiler.h>
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#include "intlist.h"
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static struct rb_node *intlist__node_new(struct rblist *rblist __maybe_unused,
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const void *entry)
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{
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int i = (int)((long)entry);
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struct rb_node *rc = NULL;
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struct int_node *node = malloc(sizeof(*node));
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if (node != NULL) {
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node->i = i;
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node->priv = NULL;
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rc = &node->rb_node;
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}
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return rc;
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}
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static void int_node__delete(struct int_node *ilist)
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{
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free(ilist);
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}
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static void intlist__node_delete(struct rblist *rblist __maybe_unused,
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struct rb_node *rb_node)
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{
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struct int_node *node = container_of(rb_node, struct int_node, rb_node);
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int_node__delete(node);
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}
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static int intlist__node_cmp(struct rb_node *rb_node, const void *entry)
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{
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int i = (int)((long)entry);
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struct int_node *node = container_of(rb_node, struct int_node, rb_node);
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return node->i - i;
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}
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int intlist__add(struct intlist *ilist, int i)
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{
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return rblist__add_node(&ilist->rblist, (void *)((long)i));
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}
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void intlist__remove(struct intlist *ilist, struct int_node *node)
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{
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rblist__remove_node(&ilist->rblist, &node->rb_node);
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}
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static struct int_node *__intlist__findnew(struct intlist *ilist,
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int i, bool create)
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{
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struct int_node *node = NULL;
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struct rb_node *rb_node;
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if (ilist == NULL)
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return NULL;
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if (create)
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rb_node = rblist__findnew(&ilist->rblist, (void *)((long)i));
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else
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rb_node = rblist__find(&ilist->rblist, (void *)((long)i));
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if (rb_node)
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node = container_of(rb_node, struct int_node, rb_node);
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return node;
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}
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struct int_node *intlist__find(struct intlist *ilist, int i)
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{
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return __intlist__findnew(ilist, i, false);
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}
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struct int_node *intlist__findnew(struct intlist *ilist, int i)
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{
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return __intlist__findnew(ilist, i, true);
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}
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static int intlist__parse_list(struct intlist *ilist, const char *s)
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{
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char *sep;
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int err;
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do {
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long value = strtol(s, &sep, 10);
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err = -EINVAL;
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if (*sep != ',' && *sep != '\0')
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break;
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err = intlist__add(ilist, value);
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if (err)
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break;
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s = sep + 1;
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} while (*sep != '\0');
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return err;
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}
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struct intlist *intlist__new(const char *slist)
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{
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struct intlist *ilist = malloc(sizeof(*ilist));
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if (ilist != NULL) {
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rblist__init(&ilist->rblist);
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ilist->rblist.node_cmp = intlist__node_cmp;
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ilist->rblist.node_new = intlist__node_new;
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ilist->rblist.node_delete = intlist__node_delete;
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if (slist && intlist__parse_list(ilist, slist))
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goto out_delete;
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}
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return ilist;
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out_delete:
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intlist__delete(ilist);
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return NULL;
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}
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void intlist__delete(struct intlist *ilist)
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{
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if (ilist != NULL)
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rblist__delete(&ilist->rblist);
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}
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struct int_node *intlist__entry(const struct intlist *ilist, unsigned int idx)
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{
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struct int_node *node = NULL;
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struct rb_node *rb_node;
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rb_node = rblist__entry(&ilist->rblist, idx);
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if (rb_node)
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node = container_of(rb_node, struct int_node, rb_node);
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return node;
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}
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