SharedBufferPOSIX.cpp   [plain text]


/*
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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#include "config.h"
#include "SharedBuffer.h"

#include "FileSystem.h"

#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <wtf/text/CString.h>

namespace WebCore {

PassRefPtr<SharedBuffer> SharedBuffer::createWithContentsOfFile(const String& filePath)
{
    if (filePath.isEmpty())
        return 0;

    CString filename = fileSystemRepresentation(filePath);
    int fd = open(filename.data(), O_RDONLY);
    if (fd == -1)
        return 0;

    struct stat fileStat;
    if (fstat(fd, &fileStat)) {
        close(fd);
        return 0;
    }

    size_t bytesToRead = fileStat.st_size;
    if (bytesToRead != fileStat.st_size) {
        close(fd);
        return 0;
    }

    RefPtr<SharedBuffer> result = create();
    result->m_buffer.grow(bytesToRead);

    size_t totalBytesRead = 0;
    ssize_t bytesRead;
    while ((bytesRead = read(fd, result->m_buffer.data() + totalBytesRead, bytesToRead - totalBytesRead)) > 0)
        totalBytesRead += bytesRead;

    close(fd);

    return totalBytesRead == bytesToRead ? result.release() : 0;
}

} // namespace WebCore