| /****************************************************************************** |
| * |
| * Copyright (C) 2014 Google, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| #include "base.h" |
| #include "support/property.h" |
| |
| bt_property_t *property_copy_array(const bt_property_t *properties, size_t count) { |
| bt_property_t *clone = calloc(sizeof(bt_property_t), count); |
| if (!clone) { |
| return NULL; |
| } |
| |
| memcpy(&clone[0], &properties[0], sizeof(bt_property_t) * count); |
| for (size_t i = 0; i < count; ++i) { |
| clone[i].val = calloc(clone[i].len, 1); |
| memcpy(clone[i].val, properties[i].val, clone[i].len); |
| } |
| |
| return clone; |
| } |
| |
| bt_property_t *property_new_name(const char *name) { |
| bt_bdname_t *bdname = calloc(sizeof(bt_bdname_t), 1); |
| bt_property_t *property = calloc(sizeof(bt_property_t), 1); |
| |
| property->type = BT_PROPERTY_BDNAME; |
| property->val = bdname; |
| property->len = sizeof(bt_bdname_t); |
| |
| strlcpy((char *)bdname->name, name, sizeof(bdname->name)); |
| |
| return property; |
| } |
| |
| bt_property_t *property_new_discovery_timeout(uint32_t timeout) { |
| uint32_t *val = malloc(sizeof(uint32_t)); |
| bt_property_t *property = malloc(sizeof(bt_property_t)); |
| |
| property->type = BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT; |
| property->val = val; |
| property->len = sizeof(uint32_t); |
| |
| *val = timeout; |
| |
| return property; |
| } |
| |
| // Warning: not thread safe. |
| const char *property_extract_name(const bt_property_t *property) { |
| static char name[250] = { 0 }; |
| if (!property || property->type != BT_PROPERTY_BDNAME || !property->val) { |
| return NULL; |
| } |
| |
| strncpy(name, (const char *)((bt_bdname_t *)property->val)->name, property->len); |
| name[sizeof(name) - 1] = '\0'; |
| |
| return name; |
| } |
| |
| bool property_equals(const bt_property_t *p1, const bt_property_t *p2) { |
| // Two null properties are not the same. May need to revisit that |
| // decision when we have a test case that exercises that condition. |
| if (!p1 || !p2 || p1->type != p2->type) { |
| return false; |
| } |
| |
| // Although the Bluetooth name is a 249-byte array, the implementation |
| // treats it like a variable-length array with its size specified in the |
| // property's `len` field. We special-case the equivalence of BDNAME |
| // types here by truncating the larger, zero-padded name to its string |
| // length and comparing against the shorter name. |
| // |
| // Note: it may be the case that both strings are zero-padded but that |
| // hasn't come up yet so this implementation doesn't handle it. |
| if (p1->type == BT_PROPERTY_BDNAME && p1->len != p2->len) { |
| const bt_property_t *shorter = p1, *longer = p2; |
| if (p1->len > p2->len) { |
| shorter = p2; |
| longer = p1; |
| } |
| return strlen((const char *)longer->val) == (size_t)shorter->len && !memcmp(longer->val, shorter->val, shorter->len); |
| } |
| |
| return p1->len == p2->len && !memcmp(p1->val, p2->val, p1->len); |
| } |
| |
| void property_free(bt_property_t *property) { |
| property_free_array(property, 1); |
| } |
| |
| void property_free_array(bt_property_t *properties, size_t count) { |
| for (size_t i = 0; i < count; ++i) { |
| free(properties[i].val); |
| } |
| |
| free(properties); |
| } |