lib/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 <stdint.h>
  33 #include <glib.h>
  34
  35 static
  36 void field_path_destroy(struct bt_object *obj)
  37 {
  38         struct bt_ctf_field_path *field_path = (struct bt_ctf_field_path *) obj;
  39
  40         if (!field_path) {
  41                 return;
  42         }
  43
  44         if (field_path->indexes) {
  45                 g_array_free(field_path->indexes, TRUE);
  46         }
  47         g_free(field_path);
  48 }
  49
  50 BT_HIDDEN
  51 struct bt_ctf_field_path *bt_ctf_field_path_create(void)
  52 {
  53         struct bt_ctf_field_path *field_path = NULL;
  54
  55         field_path = g_new0(struct bt_ctf_field_path, 1);
  56         if (!field_path) {
  57                 goto error;
  58         }
  59
  60         bt_object_init(field_path, field_path_destroy);
  61         field_path->root = BT_CTF_SCOPE_UNKNOWN;
  62         field_path->indexes = g_array_new(TRUE, FALSE, sizeof(int));
  63         if (!field_path->indexes) {
  64                 goto error;
  65         }
  66
  67         return field_path;
  68
  69 error:
  70         BT_PUT(field_path);
  71         return NULL;
  72 }
  73
  74 BT_HIDDEN
  75 void bt_ctf_field_path_clear(struct bt_ctf_field_path *field_path)
  76 {
  77         if (field_path->indexes->len > 0) {
  78                 g_array_remove_range(field_path->indexes, 0,
  79                         field_path->indexes->len);
  80         }
  81 }
  82
  83 BT_HIDDEN
  84 struct bt_ctf_field_path *bt_ctf_field_path_copy(
  85                 struct bt_ctf_field_path *path)
  86 {
  87         struct bt_ctf_field_path *new_path = bt_ctf_field_path_create();
  88
  89         if (!new_path) {
  90                 goto end;
  91         }
  92
  93         new_path->root = path->root;
  94         g_array_insert_vals(new_path->indexes, 0,
  95                 path->indexes->data, path->indexes->len);
  96 end:
  97         return new_path;
  98 }
  99
 100 enum bt_ctf_scope bt_ctf_field_path_get_root_scope(
 101                 const struct bt_ctf_field_path *field_path)
 102 {
 103         enum bt_ctf_scope scope = BT_CTF_SCOPE_UNKNOWN;
 104
 105         if (!field_path) {
 106                 goto end;
 107         }
 108
 109         scope = field_path->root;
 110
 111 end:
 112         return scope;
 113 }
 114
 115 int64_t bt_ctf_field_path_get_index_count(
 116                 const struct bt_ctf_field_path *field_path)
 117 {
 118         return field_path ? (int64_t) field_path->indexes->len : (int64_t) -1;
 119 }
 120
 121 int bt_ctf_field_path_get_index(const struct bt_ctf_field_path *field_path,
 122                 uint64_t index)
 123 {
 124         int ret = INT_MIN;
 125
 126         if (!field_path) {
 127                 goto end;
 128         }
 129
 130         if (index >= field_path->indexes->len) {
 131                 goto end;
 132         }
 133
 134         ret = g_array_index(field_path->indexes, int, index);
 135
 136 end:
 137         return ret;
 138 }