Rapid-Q Documentation by William Yu (c)1999 | Appendix A: QMEMORYSTREAM |
|
Field | Type | R/W | Default | Support |
|
|
|
|
|
LineCount | INTEGER | R | W | |
LineCount determines how many lines there are in the memorystream. Note that LineCount ignores the CR character, and will only detect LF, so it treats CRLF as one line, but LFLF as 2 lines. | ||||
Pointer | INTEGER | R | WXG | |
Pointer specifies the memory address of the memorystream. | ||||
Position | INTEGER | RW | WXG | |
Position specifies the current position of the memory pointer, any read/write operations will begin from here. | ||||
Size | INTEGER | RW | WXG | |
Size determines the number of bytes allocated to the memorystream. |
Method | Type | Description | Params | Support |
|
|
|
|
|
Close | SUB | Close the stream | 0 | WXG |
CopyFrom | SUB (Stream, Bytes%) | Copy from another stream Either QFileStream or QMemoryStream |
2 | WXG |
Use CopyFrom to copy a QFILESTREAM or a QMEMORYSTREAM to the current memorystream. Details: If Bytes% = 0 then the Stream is reset to position 0 and the whole stream is then copied. Example:
|
||||
ExtractRes | SUB (Resource AS LONG) | Extract resource to memorystream | 1 | WXG |
Extracts a resource from your program to the memorystream. Details: The parameter Resource is not the resource handle, but the absolute position of the resource within your file. This requires that you use the keyword Resource(n) to specify the resource number. Example (dumping all resources):
|
||||
LoadArray | SUB (Array(), NumElements&) | Load data into array | 2 | WXG |
MemCopyFrom | SUB (Address&, Bytes&) | Copies contents of Address& to memorystream | 2 | WXG |
MemCopyTo | SUB (Address&, Bytes&) | Copies contents to Address& | 2 | WXG |
Read | SUB (variable) | Generic Read, determines the storage space and saves data in variable | 1 | WXG |
ReadLine | FUNCTION () AS STRING | Reads an entire line | 0 | W |
ReadNum | FUNCTION (n) AS DOUBLE | Read n bytes, returns number | 1 | WXG |
ReadStr | FUNCTION (n) AS STRING | Read n bytes, returns the string | 1 | WXG |
ReadBinStr | FUNCTION (n) AS STRING | Read n bytes, returns the binary string | 1 | W |
ReadUDT | SUB (MyType) | Read and store data in a MyType structure | 1 | WXG |
SaveArray | SUB (Array(), NumElements&) | Save array | 2 | WXG |
Seek | SUB (Position%, From%) | Seek to Position%, From% see RAPIDQ.INC | 2 | WXG |
Write | SUB (variable) | Generic Write, determines the storage space and saves data to memory | 1 | WXG |
WriteLine | SUB (S AS STRING) | Writes string with CR+LF | 1 | W |
WriteNum | SUB (number, bytes%) | Writes a number to memory | 2 | WXG |
WriteBinStr | SUB (string, bytes%) | Writes a binary string to file (slow) | 2 | W |
WriteStr | SUB (string, bytes%) | Writes string to memory | 2 | WXG |
WriteUDT | SUB (MyType) | Write data stored in a MyType structure | 1 | WXG |
DIM Mem AS QMemoryStream S$ = "Hello world!" Mem.WriteStr(S$, LEN(S$)) Mem.Position = 0 S$ = Mem.ReadStr(LEN(S$)) PRINT S$ '' print it Mem.Close '------------------------------------------------------ DIM Mem AS QMemoryStream DIM I AS INTEGER I = 12 Mem.Write(I) S$ = "Hello world!" Mem.Write(S$) Mem.Position = 0 Mem.Read(I) S$ = SPACE$(I) Mem.Read(S$) PRINT S$ '' print it Mem.Close '------------------------------------------------------ TYPE MyType Name AS STRING*30 Phone AS STRING*8 Age AS INTEGER END TYPE DIM Person AS MyType Person.Name = "Joe" Person.Phone = "555-5555" DIM Mem AS QMemoryStream Mem.WriteUDT(Person)