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sessionhash.cpp
Package: 一个类似QQ的软件源码.rar [view]
Upload User: zslianheng
Upload Date: 2013-04-03
Package Size: 946k
Code Size: 2k
Category:
Linux-Unix program
Development Platform:
Visual C++
- /***************************************************************************
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * copyright : (C) 2002 by Zhang Yong *
- * email : z-yong163@163.com *
- ***************************************************************************/
- #include <stdlib.h>
- #include "udpsession.h"
- #include "sessionhash.h"
- IcqList SessionHash::alive[ALIVE_HASH_SIZE];
- IcqList SessionHash::dead[DEAD_HASH_SIZE];
- UdpSession *SessionHash::getAlive(uint32 uin)
- {
- UdpSession *p;
- IcqListItem *pos;
- IcqListItem *head = &alive[hashfn(uin)].head;
- LIST_FOR_EACH(pos, head) {
- p = LIST_ENTRY(pos, UdpSession, listItem);
- if (p->uin == uin)
- return p;
- }
- return NULL;
- }
- UdpSession *SessionHash::getDead(uint32 ip, uint16 port)
- {
- UdpSession *p;
- IcqListItem *pos;
- IcqListItem *head = &dead[hashfn(ip, port)].head;
- LIST_FOR_EACH(pos, head) {
- p = LIST_ENTRY(pos, UdpSession, listItem);
- if (p->ip == ip && p->port == port)
- return p;
- }
- return NULL;
- }
- int SessionHash::random(uint32 results[], int n)
- {
- int start = rand() % ALIVE_HASH_SIZE;
- int num = 0;
- for (int i = start + 1; num < n && i != start; i++) {
- if (i >= ALIVE_HASH_SIZE)
- i = 0;
- IcqListItem *pos, *head = &alive[i].head;
- LIST_FOR_EACH(pos, head) {
- UdpSession *p = LIST_ENTRY(pos, UdpSession, listItem);
- results[num++] = p->uin;
- if (num >= n)
- break;
- }
- }
- return num;
- }