platform_bionic/libc/system_properties/prop_info.cpp

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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "system_properties/prop_info.h"
#include <string.h>
static constexpr const char kLongLegacyError[] =
"Must use __system_property_read_callback() to read";
static_assert(sizeof(kLongLegacyError) < prop_info::kLongLegacyErrorBufferSize,
"Error message for long properties read by legacy libc must fit within 56 chars");
prop_info::prop_info(const char* name, uint32_t namelen, const char* value, uint32_t valuelen) {
memcpy(this->name, name, namelen);
this->name[namelen] = '\0';
atomic_init(&this->serial, valuelen << 24);
memcpy(this->value, value, valuelen);
this->value[valuelen] = '\0';
}
prop_info::prop_info(const char* name, uint32_t namelen, uint32_t long_offset) {
memcpy(this->name, name, namelen);
this->name[namelen] = '\0';
auto error_value_len = sizeof(kLongLegacyError) - 1;
atomic_init(&this->serial, error_value_len << 24 | kLongFlag);
memcpy(this->long_property.error_message, kLongLegacyError, sizeof(kLongLegacyError));
this->long_property.offset = long_offset;
}