formats/ctf/ir/field-path.c

   1 /*
   2  * field-path.c
   3  *
   4  * Babeltrace CTF IR - Field path
   5  *
   6  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  25  * SOFTWARE.
  26  */
  27
  28 #include <babeltrace/ctf-ir/field-types.h>
  29 #include <babeltrace/ctf-ir/field-path-internal.h>
  30 #include <babeltrace/ctf-ir/field-path.h>
  31 #include <limits.h>
  32 #include <glib.h>
  33
  34 static
  35 void field_path_destroy(struct bt_object *obj)
  36 {
  37         struct bt_ctf_field_path *field_path = (struct bt_ctf_field_path *) obj;
  38
  39         if (!field_path) {
  40                 return;
  41         }
  42
  43         if (field_path->indexes) {
  44                 g_array_free(field_path->indexes, TRUE);
  45         }
  46         g_free(field_path);
  47 }
  48
  49 BT_HIDDEN
  50 struct bt_ctf_field_path *bt_ctf_field_path_create(void)
  51 {
  52         struct bt_ctf_field_path *field_path = NULL;
  53
  54         field_path = g_new0(struct bt_ctf_field_path, 1);
  55         if (!field_path) {
  56                 goto error;
  57         }
  58
  59         bt_object_init(field_path, field_path_destroy);
  60         field_path->root = BT_CTF_SCOPE_UNKNOWN;
  61         field_path->indexes = g_array_new(TRUE, FALSE, sizeof(int));
  62         if (!field_path->indexes) {
  63                 goto error;
  64         }
  65
  66         return field_path;
  67
  68 error:
  69         BT_PUT(field_path);
  70         return NULL;
  71 }
  72
  73 BT_HIDDEN
  74 void bt_ctf_field_path_clear(struct bt_ctf_field_path *field_path)
  75 {
  76         if (field_path->indexes->len > 0) {
  77                 g_array_remove_range(field_path->indexes, 0,
  78                         field_path->indexes->len);
  79         }
  80 }
  81
  82 BT_HIDDEN
  83 struct bt_ctf_field_path *bt_ctf_field_path_copy(
  84                 struct bt_ctf_field_path *path)
  85 {
  86         struct bt_ctf_field_path *new_path = bt_ctf_field_path_create();
  87
  88         if (!new_path) {
  89                 goto end;
  90         }
  91
  92         new_path->root = path->root;
  93         g_array_insert_vals(new_path->indexes, 0,
  94                 path->indexes->data, path->indexes->len);
  95 end:
  96         return new_path;
  97 }
  98
  99 enum bt_ctf_scope bt_ctf_field_path_get_root_scope(
 100                 const struct bt_ctf_field_path *field_path)
 101 {
 102         enum bt_ctf_scope scope = BT_CTF_SCOPE_UNKNOWN;
 103
 104         if (!field_path) {
 105                 goto end;
 106         }
 107
 108         scope = field_path->root;
 109
 110 end:
 111         return scope;
 112 }
 113
 114 int bt_ctf_field_path_get_index_count(
 115                 const struct bt_ctf_field_path *field_path)
 116 {
 117         int ret = -1;
 118
 119         if (!field_path) {
 120                 goto end;
 121         }
 122
 123         ret = field_path->indexes->len;
 124
 125 end:
 126         return ret;
 127 }
 128
 129 int bt_ctf_field_path_get_index(const struct bt_ctf_field_path *field_path,
 130                 int index)
 131 {
 132         int ret = INT_MIN;
 133
 134         if (!field_path || index < 0) {
 135                 goto end;
 136         }
 137
 138         if (index >= field_path->indexes->len) {
 139                 goto end;
 140         }
 141
 142         ret = g_array_index(field_path->indexes, int, index);
 143
 144 end:
 145         return ret;
 146 }