1/*
2 * Copyright (C) 2010 Company 100, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "SharedBuffer.h"
28
29#include "FileSystem.h"
30
31#include <fcntl.h>
32#include <sys/stat.h>
33#include <unistd.h>
34#include <wtf/text/CString.h>
35
36namespace WebCore {
37
38PassRefPtr<SharedBuffer> SharedBuffer::createWithContentsOfFile(const String& filePath)
39{
40    if (filePath.isEmpty())
41        return 0;
42
43    CString filename = fileSystemRepresentation(filePath);
44    int fd = open(filename.data(), O_RDONLY);
45    if (fd == -1)
46        return 0;
47
48    struct stat fileStat;
49    if (fstat(fd, &fileStat)) {
50        close(fd);
51        return 0;
52    }
53
54    size_t bytesToRead = fileStat.st_size;
55    if (fileStat.st_size < 0 || bytesToRead != static_cast<unsigned long long>(fileStat.st_size)) {
56        close(fd);
57        return 0;
58    }
59
60    Vector<char> buffer(bytesToRead);
61
62    size_t totalBytesRead = 0;
63    ssize_t bytesRead;
64    while ((bytesRead = read(fd, buffer.data() + totalBytesRead, bytesToRead - totalBytesRead)) > 0)
65        totalBytesRead += bytesRead;
66
67    close(fd);
68
69    return totalBytesRead == bytesToRead ? SharedBuffer::adoptVector(buffer) : 0;
70}
71
72} // namespace WebCore
73