ntoh.c

Netscape NSPR库源码

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (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.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

/*
 * A test program for PR_htons, PR_ntohs, PR_htonl, PR_ntohl,
 * PR_htonll, and PR_ntohll.
 */

#include "prnetdb.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

/* Byte sequence in network byte order */
static unsigned char bytes_n[8] = { 1, 2, 3, 4, 5, 6, 7, 8 };

/* Integers in host byte order */
static PRUint16 s_h = 0x0102;
static PRUint32 l_h = 0x01020304;
static PRUint64 ll_h = LL_INIT(0x01020304, 0x05060708);

int main()
{
    union {
        PRUint16 s;
        PRUint32 l;
        PRUint64 ll;
        unsigned char bytes[8];
    } un;

    un.s = s_h;
    printf("%u %u\n",
        un.bytes[0], un.bytes[1]);
    un.s = PR_htons(un.s);
    printf("%u %u\n",
        un.bytes[0], un.bytes[1]);
    if (memcmp(un.bytes, bytes_n, 2)) {
        fprintf(stderr, "PR_htons failed\n");
        exit(1);
    }
    un.s = PR_ntohs(un.s);
    printf("%u %u\n",
        un.bytes[0], un.bytes[1]);
    if (un.s != s_h) {
        fprintf(stderr, "PR_ntohs failed\n");
        exit(1);
    }

    un.l = l_h;
    printf("%u %u %u %u\n",
        un.bytes[0], un.bytes[1], un.bytes[2], un.bytes[3]);
    un.l = PR_htonl(un.l);
    printf("%u %u %u %u\n",
        un.bytes[0], un.bytes[1], un.bytes[2], un.bytes[3]);
    if (memcmp(un.bytes, bytes_n, 4)) {
        fprintf(stderr, "PR_htonl failed\n");
        exit(1);
    }
    un.l = PR_ntohl(un.l);
    printf("%u %u %u %u\n",
        un.bytes[0], un.bytes[1], un.bytes[2], un.bytes[3]);
    if (un.l != l_h) {
        fprintf(stderr, "PR_ntohl failed\n");
        exit(1);
    }

    un.ll = ll_h;
    printf("%u %u %u %u %u %u %u %u\n",
        un.bytes[0], un.bytes[1], un.bytes[2], un.bytes[3],
        un.bytes[4], un.bytes[5], un.bytes[6], un.bytes[7]);
    un.ll = PR_htonll(un.ll);
    printf("%u %u %u %u %u %u %u %u\n",
        un.bytes[0], un.bytes[1], un.bytes[2], un.bytes[3],
        un.bytes[4], un.bytes[5], un.bytes[6], un.bytes[7]);
    if (memcmp(un.bytes, bytes_n, 8)) {
        fprintf(stderr, "PR_htonll failed\n");
        exit(1);
    }
    un.ll = PR_ntohll(un.ll);
    printf("%u %u %u %u %u %u %u %u\n",
        un.bytes[0], un.bytes[1], un.bytes[2], un.bytes[3],
        un.bytes[4], un.bytes[5], un.bytes[6], un.bytes[7]);
    if (LL_NE(un.ll, ll_h)) {
        fprintf(stderr, "PR_ntohll failed\n");
        exit(1);
    }

    printf("PASS\n");
    return 0;
}