我有一个包含deflate
4096 字节的 zlib d 块的文件。我可以使用 Minzip 的inflate
实现,使用 C++ 扩展至少 1 个 4096 字节块,而不会出现乱码文本或data error
.
我正在使用以下 C++ 实现来扩充数据:
#define DEC_BUFFER_LEN 20000
int main(int argc, char* argv[]) {
FILE *file = fopen("unpackme.3di", "rb");
char *buffer = new char[4096];
std::fstream outputFile;
outputFile.open("output.txt", std::ios_base::out | std::ios_base::trunc | std::ios_base::binary);
// Data zit nu in de buffer
char *decbuffer = new char[DEC_BUFFER_LEN];
mz_streamp streampie = new mz_stream();
streampie->zalloc = Z_NULL;
streampie->zfree = Z_NULL;
streampie->opaque = Z_NULL;
streampie->avail_in = Z_NULL;
streampie->next_in = Z_NULL;
if (inflateInit(streampie) != Z_OK)
return -1;
fread(buffer, 1, 4096, file);
streampie->next_in = (Byte *)&buffer[0];
streampie->avail_in = 4096;
streampie->next_out = (Byte *)&decbuffer[0];
streampie->avail_out = DEC_BUFFER_LEN;
streampie->total_out = 0;
int res = inflate(streampie, Z_NO_FLUSH);
if (res != Z_OK && res != Z_STREAM_END) {
std::cout << "Error: " << streampie->msg << std::endl;
return;
}
outputFile.write(decbuffer, streampie->total_out); // Write data to file
fclose(file);
inflateEnd(streampie);
outputFile.flush();
outputFile.close();
getchar();
return 0;
}
我正在使用以下 PHP 实现:
function Unpack3DI($inputFilename) {
$handle = fopen($inputFilename, 'rb');
if ($handle === false) return null;
$data = gzinflate(fread($handle, 4096));
return $data;
}
var_dump(Unpack3DI('unpackme.3di'));
结果:
Warning: gzinflate() [function.gzinflate]: data error in /var/www/html/3di.php on line 9
bool(false)