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我想解析存儲在sqlite數據庫中的協議緩衝區文件。我對流的瞭解不多,所以我被困住了。下面是我使用的文件插入到源碼代碼:如何將const void *轉換爲istream?
//Read file into a buffer
ifstream file(FileName, ios::in | ios::binary);
file.seekg(0, ifstream::end);
streampos size = file.tellg();
file.seekg(0);
char* buffer = new char[size];
file.read(buffer, size); // Later insert this buffer as blob to sqlite
//...
//relevant sqlite code
int buffer_size = sqlite3_column_int(stmt, 0); //size of the blob in bytes
const void* buffer = sqlite3_column_blob(stmt, 1); // blob data
協議緩衝功能解析是
ParseFromIstream(std::istream * input)
所以真正的問題可能是如何轉換(常量無效*)到std :: istream的?
我使用obj.ParseFromArray(buffer,buffer_size)。無需投射。感謝您指出該功能。 – Carl