bigfile2.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) 1998-2000 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.
 */

#include "nspr.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <windows.h>
#endif

#define TEST_FILE_NAME "bigfile2.txt"

#define MESSAGE "Hello world!"
#define MESSAGE_SIZE 13

int main(int argc, char **argv)
{
    PRFileDesc *fd;
    PRInt64 offset, position;
    PRInt32 nbytes;
    char buf[MESSAGE_SIZE];
#ifdef _WIN32
    HANDLE hFile;
    LARGE_INTEGER li;
#endif /* _WIN32 */

    LL_I2L(offset, 1);
    LL_SHL(offset, offset, 32);

    fd = PR_Open(TEST_FILE_NAME,
            PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE, 0666);
    if (fd == NULL) {
        fprintf(stderr, "PR_Open failed\n");
        exit(1);
    }
    position = PR_Seek64(fd, offset, PR_SEEK_SET);
    if (!LL_GE_ZERO(position)) {
        fprintf(stderr, "PR_Seek64 failed\n");
        exit(1);
    }
    PR_ASSERT(LL_EQ(position, offset));
    strcpy(buf, MESSAGE);
    nbytes = PR_Write(fd, buf, sizeof(buf));
    if (nbytes != sizeof(buf)) {
        fprintf(stderr, "PR_Write failed\n");
        exit(1);
    }
    if (PR_Close(fd) == PR_FAILURE) {
        fprintf(stderr, "PR_Close failed\n");
        exit(1);
    }

    memset(buf, 0, sizeof(buf));

#ifdef _WIN32
    hFile = CreateFile(TEST_FILE_NAME, GENERIC_READ, 0, NULL,
            OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE) {
        fprintf(stderr, "CreateFile failed\n");
        exit(1);
    }
    li.QuadPart = offset;
    li.LowPart = SetFilePointer(hFile, li.LowPart, &li.HighPart, FILE_BEGIN);
    if (li.LowPart == 0xFFFFFFFF && GetLastError() != NO_ERROR) {
        fprintf(stderr, "SetFilePointer failed\n");
        exit(1);
    }
    PR_ASSERT(li.QuadPart == offset);
    if (ReadFile(hFile, buf, sizeof(buf), &nbytes, NULL) == 0) {
        fprintf(stderr, "ReadFile failed\n");
        exit(1);
    }
    PR_ASSERT(nbytes == sizeof(buf));
    if (strcmp(buf, MESSAGE)) {
        fprintf(stderr, "corrupt data:$%s$\n", buf);
        exit(1);
    }
    if (CloseHandle(hFile) == 0) {
        fprintf(stderr, "CloseHandle failed\n");
        exit(1);
    }
#endif /* _WIN32 */

    if (PR_Delete(TEST_FILE_NAME) == PR_FAILURE) {
        fprintf(stderr, "PR_Delete failed\n");
        exit(1);
    }

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