KeyView 24.1

# fpFilterStream()

This function filters text from an input stream to an output buffer.

DEPRECATED: The `fpFilterStream()` function is deprecated in KeyView 23.2.0 and later. OpenText recommends that you create a `KVDocument` to represent each document, and use fpFilter() instead.

This function is still available for existing implementations, but it might be incompatible with new functionality and might be removed in future.

## Syntax

    KVErrorCode pascal fpFilterStream(
        KVFilterSession  session,
        void            *pStreamContext
        KVFilterOutput  *pFilterOutput,
        KVSummaryInfoEx *pSummaryInfo);

## Arguments

`session` | A KeyView Filter session that you initialized by calling fpInit().
`pStreamContext` | A pointer returned from fpOpenStream() or fpOpenStreamEx2().
`pFilterOutput` | A pointer to the KVFilterOutput structure. This structure defines the output buffer.
`pSummaryInfo` | This argument is reserved. It must be `NULL`.

## Returns

The return value is an error code. See KVErrorCode.

## Discussion

- This function processes data in chunks. To return the entire output stream, you must call this function repeatedly until the entire output buffer is processed, that is, until the following condition occurs:

      pFilterOutput-> cbText == 0

- After each call to `fpFilterStream`, once the data in the `pFilterOutput` argument is no longer required, call fpFreeFilterOutput to free the memory allocated by this function.
- When filtering out-of-process in streaming mode (see Configure Pipe-Streaming), you must finish filtering the stream before using any interface function other than `fpFilterStream()` or fpCloseStream() with the same context pointer. Filtering can be completed at any time by calling fpCloseStream() or by calling `fpFilterStream()` until `pFilterOutput->cbText == 0`.

## Example

    error = (int)(*pFilterInterface->fpFilterStream)( pFilter, pStream, &filterOut, NULL );

Copyright 2016-2023 Open Text
Version 24.1 | Last updated December 2023

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Product: IDOL KeyView 24.1

Topic Title: fpFilterStream()