C++ Data::Append方法代码示例

torch::Data Bz2::Decompress(const torch::Data &data)
{
    const int size100k = 100000;
    int bufsize = size100k * Bz2::block100k;
    int status = 0;
    
    bz_stream stream = {0};
    
    Data buf(bufsize);
    Data dst;
    dst.HiddenAlloc(data.GetSize() * 2);
    
    /* next_in should point at the data to be compressed
     * avail_in should indicate how many bytes the library may read
     * BZ2_bzDecompress updates next_in, avail_in and total_in to reflect the number of bytes it has read */
    stream.next_in = (char*) data.GetBytes();
    stream.avail_in = (int)data.GetSize();
    
    /* next_out should point to a buffer in which the compressed data is to be placed
     * avail_out indicating how much output space is available.
     * BZ2_bzDecompress updates next_out, avail_out and total_out to reflect the number of bytes output. */
    stream.next_out = (char*)buf.GetBytes();
    stream.avail_out = (int)buf.GetSize();
    
    
    status = BZ2_bzDecompressInit(&stream, 0, 0);
    if (status != BZ_OK) {
        BZ2_bzDecompressEnd(&stream);
        return dst;
    }
    
    do {
        status = BZ2_bzDecompress(&stream);
        if (status != BZ_OK && status != BZ_STREAM_END)
            break;
        
        dst.Append(buf.GetBytes(), bufsize - stream.avail_out);
        
        stream.next_out = (char*)buf.GetBytes();
        stream.avail_out = (int)buf.GetSize();
        
    }while (status != BZ_STREAM_END);
    
    BZ2_bzDecompressEnd(&stream);
    
    return dst;
}

bool torch_data() {
    using namespace torch;
    std::string respath = Path(projectdir).Append("/tests/res").GetPath();
    std::string testpath = Path(respath).Append("test.go").GetPath();
    
//    torch::Data d = torch::File::GetBytes(testpath);
//    InfoLog("%s\n", d.ToString().c_str());
    
    Data buf;
    
    int count = 0;
    
    // Fill
    buf.Fill(0, 1);
    buf.Fill(1, 2, 0);
    buf.DumpHex();
    buf.Free();
    
    // Alloc
    
    buf.Alloc(sizeof("hello,world"));
    if ( buf.GetSize() != 12 ) return false;
    buf.Free();
    if ( buf.GetSize() != 0 ) return false;
    printf("[%d] %zu\n", ++count, buf.GetSize());
    
    char *ptr = "hello,world";
    size_t size = (strlen(ptr)+1) * sizeof(char);
    buf.Alloc( size );
    
    // CopyFrom
    
    buf.CopyFrom(ptr, size);
    ((char *)buf.GetBytes())[5] = '|';
    printf("print string: %s\n", buf.ToString().c_str());

    // Insert
    echo("[Insert] Free");
    buf.Free();
    buf.DumpHex();
    
    buf.Free();
    echo ("[Insert] Insert \"\\1\\2\\3\\4\\5\\6\\7\" -> 0xff(3)");
    char s1[] = "\1\2\3\4\5\6\7";
    buf.Insert(0, s1, sizeof(s1));
    buf.DumpHex();
    buf.DumpBinary();
    buf.DumpBinary(1);
    buf.DumpBinary(2);

    if (buf.ToHex() != std::string("0102030405060700")) return false;
    if (buf.ToBinary(1) != std::string("00000001 00000010 00000011 00000100 00000101 00000110 00000111 00000000")) return false;
    if (buf.ToBinary(2) != std::string("0000000100000010 0000001100000100 0000010100000110 0000011100000000")) return false;
    if (buf.ToBinary() != std::string("0000000100000010000000110000010000000101000001100000011100000000")) return false;

    
    {
        Data b = buf;
        b.DumpHex();
        b.Insert(-1, 0xff);
        b.DumpHex();
        if (b.ToHex() != "01020304050607FF00") return false;
    }
    {
        char str[] = "hello,world";
        Data b;
        b.Insert(0, str, sizeof(str));
        printf("%s\n", b.GetBytes());
    }
    
    buf.Insert(3, 0xff);
    buf.DumpHex();
    if (buf.ToHex() != "010203FF0405060700") return false;

    buf.Free();
    char ss[] = "hello,world";
    buf.Insert(0, ss, sizeof(ss));
    printf("%s\n", buf.GetBytes());
    if (std::string("hello,world") != (char*)buf.GetBytes()) return false;
    buf.Insert(3, '|');
    printf("%s\n", buf.GetBytes());
    if (std::string("hel|lo,world") != (char*)buf.GetBytes()) return false;

    // Append
    echo ("[Append] Append \\0");
    buf.Free();
    buf.Append('\0');
    if (buf.ToHex() != "00") return false;
    buf.DumpHex();
    echo ("[Append] Append \"\\1\\2\\3\\4\\5\\6\\7\"");
    buf.Append(s1, sizeof(s1));
    if (buf.ToHex() != "000102030405060700") return false;
    buf.DumpHex();
    Data b;
    b.Append((void*)"\0\0", 2);
    buf.Append(b);
    if (buf.ToHex(2) != "0001 0203 0405 0607 0000 00") return false;
    buf.DumpHex(2);

    // Erase
//.........这里部分代码省略.........