tools/perf/util/intlist.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Based on intlist.c by:
   4  * (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
   5  */
   6
   7 #include <errno.h>
   8 #include <stdlib.h>
   9 #include <linux/compiler.h>
  10
  11 #include "intlist.h"
  12
  13 static struct rb_node *intlist__node_new(struct rblist *rblist __maybe_unused,
  14                                          const void *entry)
  15 {
  16         int i = (int)((long)entry);
  17         struct rb_node *rc = NULL;
  18         struct int_node *node = malloc(sizeof(*node));
  19
  20         if (node != NULL) {
  21                 node->i = i;
  22                 node->priv = NULL;
  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 static struct int_node *__intlist__findnew(struct intlist *ilist,
  61                                            int i, bool create)
  62 {
  63         struct int_node *node = NULL;
  64         struct rb_node *rb_node;
  65
  66         if (ilist == NULL)
  67                 return NULL;
  68
  69         if (create)
  70                 rb_node = rblist__findnew(&ilist->rblist, (void *)((long)i));
  71         else
  72                 rb_node = rblist__find(&ilist->rblist, (void *)((long)i));
  73
  74         if (rb_node)
  75                 node = container_of(rb_node, struct int_node, rb_node);
  76
  77         return node;
  78 }
  79
  80 struct int_node *intlist__find(struct intlist *ilist, int i)
  81 {
  82         return __intlist__findnew(ilist, i, false);
  83 }
  84
  85 struct int_node *intlist__findnew(struct intlist *ilist, int i)
  86 {
  87         return __intlist__findnew(ilist, i, true);
  88 }
  89
  90 static int intlist__parse_list(struct intlist *ilist, const char *s)
  91 {
  92         char *sep;
  93         int err;
  94
  95         do {
  96                 long value = strtol(s, &sep, 10);
  97                 err = -EINVAL;
  98                 if (*sep != ',' && *sep != '\0')
  99                         break;
 100                 err = intlist__add(ilist, value);
 101                 if (err)
 102                         break;
 103                 s = sep + 1;
 104         } while (*sep != '\0');
 105
 106         return err;
 107 }
 108
 109 struct intlist *intlist__new(const char *slist)
 110 {
 111         struct intlist *ilist = malloc(sizeof(*ilist));
 112
 113         if (ilist != NULL) {
 114                 rblist__init(&ilist->rblist);
 115                 ilist->rblist.node_cmp    = intlist__node_cmp;
 116                 ilist->rblist.node_new    = intlist__node_new;
 117                 ilist->rblist.node_delete = intlist__node_delete;
 118
 119                 if (slist && intlist__parse_list(ilist, slist))
 120                         goto out_delete;
 121         }
 122
 123         return ilist;
 124 out_delete:
 125         intlist__delete(ilist);
 126         return NULL;
 127 }
 128
 129 void intlist__delete(struct intlist *ilist)
 130 {
 131         if (ilist != NULL)
 132                 rblist__delete(&ilist->rblist);
 133 }
 134
 135 struct int_node *intlist__entry(const struct intlist *ilist, unsigned int idx)
 136 {
 137         struct int_node *node = NULL;
 138         struct rb_node *rb_node;
 139
 140         rb_node = rblist__entry(&ilist->rblist, idx);
 141         if (rb_node)
 142                 node = container_of(rb_node, struct int_node, rb_node);
 143
 144         return node;
 145 }