mirror of
https://github.com/sogou/workflow.git
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146 lines
3.0 KiB
C++
146 lines
3.0 KiB
C++
/*
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Copyright (c) 2020 Sogou, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Author: Xie Han (xiehan@sogou-inc.com;63350856@qq.com)
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <arpa/inet.h>
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#include <utility>
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#include "message.h"
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namespace protocol
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{
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int TutorialMessage::encode(struct iovec vectors[], int max/*max==8192*/)
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{
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uint32_t n = htonl(this->body_size);
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memcpy(this->head, &n, 4);
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vectors[0].iov_base = this->head;
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vectors[0].iov_len = 4;
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vectors[1].iov_base = this->body;
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vectors[1].iov_len = this->body_size;
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return 2; /* return the number of vectors used, no more then max. */
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}
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int TutorialMessage::append(const void *buf, size_t size)
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{
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if (this->head_received < 4)
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{
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size_t head_left;
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void *p;
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p = &this->head[head_received];
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head_left = 4 - this->head_received;
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if (size < 4 - this->head_received)
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{
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memcpy(p, buf, size);
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this->head_received += size;
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return 0;
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}
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memcpy(p, buf, head_left);
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size -= head_left;
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buf = (const char *)buf + head_left;
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p = this->head;
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this->body_size = ntohl(*(uint32_t *)p);
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if (this->body_size > this->size_limit)
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{
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errno = EMSGSIZE;
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return -1;
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}
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this->body = (char *)malloc(this->body_size);
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if (!this->body)
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return -1;
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this->body_received = 0;
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}
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size_t body_left = this->body_size - this->body_received;
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if (size > body_left)
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{
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errno = EBADMSG;
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return -1;
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}
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memcpy(this->body, buf, size);
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if (size < body_left)
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return 0;
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return 1;
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}
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int TutorialMessage::set_message_body(const void *body, size_t size)
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{
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void *p = malloc(size);
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if (!p)
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return -1;
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memcpy(p, body, size);
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free(this->body);
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this->body = (char *)p;
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this->body_size = size;
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this->head_received = 4;
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this->body_received = size;
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return 0;
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}
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TutorialMessage::TutorialMessage(TutorialMessage&& msg) :
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ProtocolMessage(std::move(msg))
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{
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memcpy(this->head, msg.head, 4);
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this->head_received = msg.head_received;
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this->body = msg.body;
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this->body_received = msg.body_received;
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this->body_size = msg.body_size;
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msg.head_received = 0;
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msg.body = NULL;
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msg.body_size = 0;
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}
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TutorialMessage& TutorialMessage::operator = (TutorialMessage&& msg)
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{
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if (&msg != this)
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{
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*(ProtocolMessage *)this = std::move(msg);
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memcpy(this->head, msg.head, 4);
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this->head_received = msg.head_received;
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this->body = msg.body;
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this->body_received = msg.body_received;
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this->body_size = msg.body_size;
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msg.head_received = 0;
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msg.body = NULL;
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msg.body_size = 0;
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}
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return *this;
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}
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}
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