tools/perf/util/intlist.c

   1 /*
   2  * Based on intlist.c by:
   3  * (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
   4  *
   5  * Licensed under the GPLv2.
   6  */
   7
   8 #include <errno.h>
   9 #include <stdlib.h>
  10 #include <linux/compiler.h>
  11
  12 #include "intlist.h"
  13
  14 static struct rb_node *intlist__node_new(struct rblist *rblist __maybe_unused,
  15                                          const void *entry)
  16 {
  17         int i = (int)((long)entry);
  18         struct rb_node *rc = NULL;
  19         struct int_node *node = malloc(sizeof(*node));
  20
  21         if (node != NULL) {
  22                 node->i = i;
  23                 rc = &node->rb_node;
  24         }
  25
  26         return rc;
  27 }
  28
  29 static void int_node__delete(struct int_node *ilist)
  30 {
  31         free(ilist);
  32 }
  33
  34 static void intlist__node_delete(struct rblist *rblist __maybe_unused,
  35                                  struct rb_node *rb_node)
  36 {
  37         struct int_node *node = container_of(rb_node, struct int_node, rb_node);
  38
  39         int_node__delete(node);
  40 }
  41
  42 static int intlist__node_cmp(struct rb_node *rb_node, const void *entry)
  43 {
  44         int i = (int)((long)entry);
  45         struct int_node *node = container_of(rb_node, struct int_node, rb_node);
  46
  47         return node->i - i;
  48 }
  49
  50 int intlist__add(struct intlist *ilist, int i)
  51 {
  52         return rblist__add_node(&ilist->rblist, (void *)((long)i));
  53 }
  54
  55 void intlist__remove(struct intlist *ilist, struct int_node *node)
  56 {
  57         rblist__remove_node(&ilist->rblist, &node->rb_node);
  58 }
  59
  60 struct int_node *intlist__find(struct intlist *ilist, int i)
  61 {
  62         struct int_node *node = NULL;
  63         struct rb_node *rb_node = rblist__find(&ilist->rblist, (void *)((long)i));
  64
  65         if (rb_node)
  66                 node = container_of(rb_node, struct int_node, rb_node);
  67
  68         return node;
  69 }
  70
  71 struct intlist *intlist__new(void)
  72 {
  73         struct intlist *ilist = malloc(sizeof(*ilist));
  74
  75         if (ilist != NULL) {
  76                 rblist__init(&ilist->rblist);
  77                 ilist->rblist.node_cmp    = intlist__node_cmp;
  78                 ilist->rblist.node_new    = intlist__node_new;
  79                 ilist->rblist.node_delete = intlist__node_delete;
  80         }
  81
  82         return ilist;
  83 }
  84
  85 void intlist__delete(struct intlist *ilist)
  86 {
  87         if (ilist != NULL)
  88                 rblist__delete(&ilist->rblist);
  89 }
  90
  91 struct int_node *intlist__entry(const struct intlist *ilist, unsigned int idx)
  92 {
  93         struct int_node *node = NULL;
  94         struct rb_node *rb_node;
  95
  96         rb_node = rblist__entry(&ilist->rblist, idx);
  97         if (rb_node)
  98                 node = container_of(rb_node, struct int_node, rb_node);
  99
 100         return node;
 101 }