stream.c File Reference

Handle stream of data. More...

#include <config.h>
#include <assert.h>
#include <freetds/tds.h>
#include <freetds/iconv.h>
#include <freetds/stream.h>

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Functions
TDSRET	tds_convert_stream (TDSSOCKET *tds, TDSICONV *char_conv, TDS_ICONV_DIRECTION direction, TDSINSTREAM *istream, TDSOUTSTREAM *ostream)
	Reads and writes from a stream converting characters.
TDSRET	tds_copy_stream (TDSINSTREAM *istream, TDSOUTSTREAM *ostream)
	Reads and writes from a stream to another.
void	tds_datain_stream_init (TDSDATAINSTREAM *stream, TDSSOCKET *tds, size_t wire_size)
	Initialize a data input stream.
static int	tds_datain_stream_read (TDSINSTREAM *stream, void *ptr, size_t len)
	Reads data from network for input stream.
void	tds_dataout_stream_init (TDSDATAOUTSTREAM *stream, TDSSOCKET *tds)
	Initialize a data output stream.
static int	tds_dataout_stream_write (TDSOUTSTREAM *stream, size_t len)
	Writes data to network for output stream.
TDSRET	tds_dynamic_stream_init (TDSDYNAMICSTREAM *stream, void **ptr, size_t allocated)
	Initialize a dynamic output stream.
static int	tds_dynamic_stream_write (TDSOUTSTREAM *stream, size_t len)
	Writes data to a dynamic allocated buffer.
void	tds_staticin_stream_init (TDSSTATICINSTREAM *stream, const void *ptr, size_t len)
	Initialize an input stream for read from a static allocated buffer.
static int	tds_staticin_stream_read (TDSINSTREAM *stream, void *ptr, size_t len)
	Reads data from a static allocated buffer.
void	tds_staticout_stream_init (TDSSTATICOUTSTREAM *stream, void *ptr, size_t len)
	Initialize an output stream for write into a static allocated buffer.
static int	tds_staticout_stream_write (TDSOUTSTREAM *stream, size_t len)
	Writes data to a static allocated buffer.

Detailed Description

Handle stream of data.

Function Documentation

tds_convert_stream()

TDSRET tds_convert_stream	(	TDSSOCKET *	tds,
		TDSICONV *	char_conv,
		TDS_ICONV_DIRECTION	direction,
		TDSINSTREAM *	istream,
		TDSOUTSTREAM *	ostream
	)

Reads and writes from a stream converting characters.

Convert a stream from istream to ostream using a specific conversion.

Parameters

tds	A pointer to the TDSSOCKET structure managing a client/server operation.
char_conv	conversion structure
direction	specify conversion to server or from server
istream	input stream
ostream	output stream

Returns

TDS_SUCCESS of TDS_FAIL

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tds_copy_stream()

TDSRET tds_copy_stream	(	TDSINSTREAM *	istream,
		TDSOUTSTREAM *	ostream
	)

Reads and writes from a stream to another.

Copy data from a stream to another.

Parameters

tds	A pointer to the TDSSOCKET structure managing a client/server operation.
istream	input stream
ostream	output stream

Returns

TDS_SUCCESS or TDS_FAIL

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tds_datain_stream_init()

void tds_datain_stream_init	(	TDSDATAINSTREAM *	stream,
		TDSSOCKET *	tds,
		size_t	wire_size
	)

Initialize a data input stream.

This stream read data from network.

Parameters

stream	input stream to initialize
tds	A pointer to the TDSSOCKET structure managing a client/server operation.
wire_size	byte to read

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tds_dataout_stream_init()

void tds_dataout_stream_init	(	TDSDATAOUTSTREAM *	stream,
		TDSSOCKET *	tds
	)

Initialize a data output stream.

This stream writes data to network.

Parameters

stream	output stream to initialize
tds	A pointer to the TDSSOCKET structure managing a client/server operation.

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tds_dynamic_stream_init()

TDSRET tds_dynamic_stream_init	(	TDSDYNAMICSTREAM *	stream,
		void **	ptr,
		size_t	allocated
	)

Initialize a dynamic output stream.

This stream write data into a dynamic allocated buffer.

Parameters

stream	stream to initialize
ptr	pointer to pointer to buffer to fill. Buffer will be extended as needed
allocated	bytes initialially allocated for the buffer. Useful to reuse buffers

Returns

TDS_SUCCESS on success, TDS_FAIL otherwise

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tds_staticin_stream_init()

void tds_staticin_stream_init	(	TDSSTATICINSTREAM *	stream,
		const void *	ptr,
		size_t	len
	)

Initialize an input stream for read from a static allocated buffer.

Parameters

stream	stream to initialize
ptr	buffer to read from
len	buffer size in bytes

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tds_staticout_stream_init()

void tds_staticout_stream_init	(	TDSSTATICOUTSTREAM *	stream,
		void *	ptr,
		size_t	len
	)

Initialize an output stream for write into a static allocated buffer.

Parameters

stream	stream to initialize
ptr	buffer to write to
len	buffer size in bytes

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