Пример #1
0
        internal void ReadpVm(IntPtr pVm, int version, SqliteCommand cmd)
        {
            int    pN;
            IntPtr pazValue;
            IntPtr pazColName;
            bool   first = true;

            int[] declmode = null;

            while (true)
            {
                bool hasdata = cmd.ExecuteStatement(pVm, out pN, out pazValue, out pazColName);

                // For the first row, get the column information
                if (first)
                {
                    first = false;

                    if (version == 3)
                    {
                        // A decltype might be null if the type is unknown to sqlite.
                        decltypes = new string[pN];
                        declmode  = new int[pN];                        // 1 == integer, 2 == datetime
                        for (int i = 0; i < pN; i++)
                        {
                            IntPtr decl = Sqlite.sqlite3_column_decltype16(pVm, i);
                            if (decl != IntPtr.Zero)
                            {
                                decltypes[i] = Marshal.PtrToStringUni(decl).ToLower(System.Globalization.CultureInfo.InvariantCulture);
                                if (decltypes[i] == "int" || decltypes[i] == "integer")
                                {
                                    declmode[i] = 1;
                                }
                                else if (decltypes[i] == "date" || decltypes[i] == "datetime")
                                {
                                    declmode[i] = 2;
                                }
                            }
                        }
                    }

                    columns = new string[pN];
                    for (int i = 0; i < pN; i++)
                    {
                        string colName;
                        if (version == 2)
                        {
                            IntPtr fieldPtr = Marshal.ReadIntPtr(pazColName, i * IntPtr.Size);
                            colName = Sqlite.HeapToString(fieldPtr, ((SqliteConnection)cmd.Connection).Encoding);
                        }
                        else
                        {
                            colName = Marshal.PtrToStringUni(Sqlite.sqlite3_column_name16(pVm, i));
                        }
                        columns[i] = colName;
                        column_names_sens [colName]   = i;
                        column_names_insens [colName] = i;
                    }
                }

                if (!hasdata)
                {
                    break;
                }

                object[] data_row = new object [pN];
                for (int i = 0; i < pN; i++)
                {
                    if (version == 2)
                    {
                        IntPtr fieldPtr = Marshal.ReadIntPtr(pazValue, i * IntPtr.Size);
                        data_row[i] = Sqlite.HeapToString(fieldPtr, ((SqliteConnection)cmd.Connection).Encoding);
                    }
                    else
                    {
                        switch (Sqlite.sqlite3_column_type(pVm, i))
                        {
                        case 1:
                            long val = Sqlite.sqlite3_column_int64(pVm, i);

                            // If the column was declared as an 'int' or 'integer', let's play
                            // nice and return an int (version 3 only).
                            if (declmode[i] == 1 && val >= int.MinValue && val <= int.MaxValue)
                            {
                                data_row[i] = (int)val;
                            }

                            // Or if it was declared a date or datetime, do the reverse of what we
                            // do for DateTime parameters.
                            else if (declmode[i] == 2)
                            {
                                data_row[i] = DateTime.FromFileTime(val);
                            }

                            else
                            {
                                data_row[i] = val;
                            }

                            break;

                        case 2:
                            data_row[i] = Sqlite.sqlite3_column_double(pVm, i);
                            break;

                        case 3:
                            data_row[i] = Marshal.PtrToStringUni(Sqlite.sqlite3_column_text16(pVm, i));

                            // If the column was declared as a 'date' or 'datetime', let's play
                            // nice and return a DateTime (version 3 only).
                            if (declmode[i] == 2)
                            {
                                data_row[i] = DateTime.Parse((string)data_row[i]);
                            }
                            break;

                        case 4:
                            int    blobbytes = Sqlite.sqlite3_column_bytes16(pVm, i);
                            IntPtr blobptr   = Sqlite.sqlite3_column_blob(pVm, i);
                            byte[] blob      = new byte[blobbytes];
                            Marshal.Copy(blobptr, blob, 0, blobbytes);
                            data_row[i] = blob;
                            break;

                        case 5:
                            data_row[i] = null;
                            break;

                        default:
                            throw new ApplicationException("FATAL: Unknown sqlite3_column_type");
                        }
                    }
                }

                rows.Add(data_row);
            }
        }