hash.cpp

包含客户和服务器的升级程序,在linux下可以运行的.

/*
 * Copyright (C) 2006, Binary Ma
 * Licence: GNU GPL 1991 - version 2
 * Bug report: [e-mail]
*/

#include "hash.h"
#include <search.h>
#include <stdlib.h>
#include <string.h>

static const char* VERSION = "0.4.1";

bool hash::init = false;
hash::hash( size_t max )
{
    error = -1;
    if( init )
        return;

    error = 0;
    head.next = NULL;
    point = &head;
    init = hcreate( max );
}

hash::~hash()
{
    if( !init || error )
        return;
    
    hdestroy();
    struct _hash_chains* save = head.next;
    while( NULL != ( point = save ) )
    {
        free( point->ent.key );
        free( point->ent.data );
        save = point->next;
        delete point;
    }
}

ENTRY* hash::search( const char* key )
{
    if( !init || NULL == key )
        return NULL;
    
    ENTRY ent;
    ent.key = (char*)key;
    ent.data = NULL;
    return hsearch( ent, FIND );
}

int hash::insert( ENTRY ent, size_t size )
{
    if( !init || error || NULL == ent.key )
        return -__LINE__;
    
    point->next = new struct _hash_chains;
    point = point->next;
    point->next = NULL;

    point->ent.key = strdup( ent.key );
    ent.key = point->ent.key;

    point->ent.data = NULL;
    if( NULL != ent.data );
    {
        point->ent.data = malloc( size );
        memcpy( point->ent.data, ent.data, size );
        ent.data = point->ent.data;
    }
    
    return !hsearch( ent, ENTER );
}