Main file for bdio-library. More...

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <pwd.h>
#include <time.h>
#include <bdio.h>

Include dependency graph for bdio.c:

Macros
#define	BDIO_MAGIC 0x7ffbd07e

#define	BDIO_VERSION 1

#define	BDIO_MAX_RECORD_LENGTH 1048575 /* 2^20-1 */

#define	BDIO_MAX_LONG_RECORD_LENGTH 268435455 /* 2^28-1 */

#define	BDIO_BUF_SIZE 1048576

#define	BDIO_MAX_HOST_LENGTH 256

#define	BDIO_MAX_USER_LENGTH 33

#define	BDIO_MAX_PINFO_LENGTH 3505

#define	HEADER_INT(fmt, uinfo, len)

#define	HEADER_INT_LONG(fmt, uinfo, len)

Functions
int	flush_buf (BDIO *fh)

int	min (int a, int b)

int	buf_write (unsigned char dat, int n, BDIO fh)

void	bdio_perror (const char s, BDIO fh)
	Print an error string to BDIO.msg. More...

void	bdio_pferror (const char s, BDIO fh)
	Print an error string to BDIO.msg. More...

BDIO *	bdio_open (const char file, const char mode, char *protocol_info)
	Open a bdio file in mode 'r' (read), 'w' (write) or 'a' (append). More...

int	bdio_close (BDIO *fh)
	Close a bdio file. More...

void	bdio_set_dflt_msg (FILE *stream)
	Set the default stream for error messages. More...

void	bdio_set_dflt_verbose (int v)
	Change the behavior for reporting of errors. More...

int	bdio_set_verbose (int v, BDIO *fh)
	Set bdio file fh to verbose (v>0) or silent (v==0) More...

int	bdio_set_msg (FILE stream, BDIO fh)
	Set the stream for error messages in fh to stream. More...

char *	bdio_get_hchost (BDIO *fh)
	Get the host on which the last header was created. More...

char *	bdio_get_hcuser (BDIO *fh)
	Get the user name who created the last header. More...

char *	bdio_get_hmhost (BDIO *fh)
	Get the host on which the last header was most recently modified. More...

char *	bdio_get_hmuser (BDIO *fh)
	Get the user name who modified the last header most recently. More...

char *	bdio_get_hpinfo (BDIO *fh)
	Get the protocol info of the last header. More...

int	bdio_get_hversion (BDIO *fh)
	Get version number in last header. More...

int	bdio_get_hcnt (BDIO *fh)
	Get number of headers read or written so far (including current) More...

int	bdio_get_hcdate (BDIO *fh)
	Get the time of creation of the last header. More...

int	bdio_get_hmdate (BDIO *fh)
	Get the time of the most recent modification of the last header. More...

int	bdio_get_ruinfo (BDIO *fh)
	Get the user info of the current record. More...

int	bdio_get_rfmt (BDIO *fh)
	Get format of current record (written or read). More...

uint64_t	bdio_get_rlen (BDIO *fh)
	Get length of data content of current record (written or read). More...

int	bdio_get_rcnt (BDIO *fh)
	Get number of records read or written so far (including current) More...

int	bdio_is_in_record (BDIO *fh)
	Returns 1 if fh is in a record and 0 otherwise. More...

int	bdio_is_in_header (BDIO *fh)
	Returns 1 if fh is in a header and 0 otherwise. More...

int	bdio_append_record (int fmt, int uinfo, BDIO *fh)
	If the last item in the file was a record: position the stream at the end of it. Otherwise EOF is returned. More...

int	bdio_seek_record (BDIO *fh)
	Position bdio stream to start of next record and read its header. More...

size_t	bdio_read (void buf, size_t nb, BDIO fh)
	Read nb bytes from fh into buf. More...

size_t	bdio_read_f32 (float buf, size_t nb, BDIO fh)
	brief Read nb bytes from fh into buf. nb must be a multiple of 4. More...

size_t	bdio_read_f64 (double buf, size_t nb, BDIO fh)
	brief Read nb bytes from fh into buf. nb must be a multiple of 8. More...

size_t	bdio_read_int32 (int32_t buf, size_t nb, BDIO fh)
	brief Read nb bytes from fh into buf. nb must be a multiple of 4. More...

size_t	bdio_read_int64 (int64_t buf, size_t nb, BDIO fh)
	brief Read nb bytes from fh into buf. nb must be a multiple of 8. More...

int	bdio_start_record (int fmt, int uinfo, BDIO *fh)
	Position bdio stream after the current record and start writing a new record with specified format and uinfo. More...

size_t	bdio_write (void ptr, size_t nb, BDIO fh)
	Write nb bytes from ptr to fh. More...

size_t	bdio_write_f32 (float ptr, size_t nb, BDIO fh)
	Write nb bytes from ptr to fh. More...

size_t	bdio_write_f64 (double ptr, size_t nb, BDIO fh)
	Write nb bytes from ptr to fh. More...

size_t	bdio_write_int32 (int32_t ptr, size_t nb, BDIO fh)
	Write nb bytes from ptr to fh. More...

size_t	bdio_write_int64 (int64_t ptr, size_t nb, BDIO fh)
	Write nb bytes from ptr to fh. More...

int	bdio_flush_record (BDIO *fh)
	Finalize the current record and set fh to BDIO_N_STATE. More...

Detailed Description

Main file for bdio-library.

Details & license

Version: 1.0

Author: Tomasz Korzec, Hubert Simma

Date: 2013-2018

Copyright: GNU Public License.

Macro Definition Documentation

#define HEADER_INT	(	fmt,
		uinfo,
		len
	)

Value:

(        0x00000001                                 /* magic=1       */ \
         | ((fmt) << 4)                               /* format        */ \
         | ((uinfo) << 8)                             /* user info     */ \
         | (((len)-4) <<12)                           /* record length */ \
  )

#define HEADER_INT_LONG	(	fmt,
		uinfo,
		len
	)

Value:

(        0x0000000000000001                         /* magic=1       */ \
         | 0x0000000000000008                         /* long rec      */ \
         | ((fmt) << 4)                               /* format        */ \
         | ((uinfo) << 8)                             /* user info     */ \
         | (((uint64_t)(len)-8) <<12)                 /* record length */ \
  )

Function Documentation

int bdio_append_record	(	int	fmt,
		int	uinfo,
		BDIO *	fh
	)

If the last item in the file was a record: position the stream at the end of it. Otherwise EOF is returned.

The specified format and uinfo must match the last record's values.
fails if

fh is a null pointer
fh is in state BDIO_E_STATE
fh is not in write/append mode
fmt does not match last record's value
info does not match last record's value

fh is not in BDIO_N_STATE

Returns: Upon success 0 is returned, otherwise EOF is returned.

Parameters

[in]

fmt

Supported formats are

format	content
BDIO_ASC_EXEC	for ASCII data containing shell scripts
BDIO_ASC_XML	for ASCII data containing XML
BDIO_ASC_GENERIC	for generic ASCII data
BDIO_BIN_GENERIC	for generic binary data
BDIO_BIN_INT32BE	for big endian 32 bit integers
BDIO_BIN_INT32LE	for little endian 32 bit integers
BDIO_BIN_INT64BE	for big endian 64 bit integers
BDIO_BIN_INT64LE	for little endian 64 bit integers
BDIO_BIN_F32BE	for big endian single precision floats
BDIO_BIN_F32LE	for little endian single precision floats
BDIO_BIN_F64BE	for big endian double precision floats
BDIO_BIN_F64LE	for little endian double precision floats
BDIO_BIN_INT32	for 32 bit integers stored in last record's endianness
BDIO_BIN_INT64	for 64 bit integers stored in last record's endianness
BDIO_BIN_F32	for single precision floats in last record's endianness
BDIO_BIN_F64	for double precision floats in last record's endianness

[in] uinfo is a number between 0 and 15 specified by the user.

[in] fh pointer to a BDIO file descriptor structure.

int bdio_close ( BDIO * fh )

Close a bdio file.

If the file has been opened in write or append mode this function must be called also to guarantee that the last written record is correctly flushed (update of the record length).

bdio_close fails if

fclose fails,
fh is a NULL pointer
fh is in state BDIO_E_STATE.

In the last case bdio_close will close the file without flushing.

Returns: Upon successful completion 0 is returned. Otherwise, EOF is returned In either case any further access (including another call to bdio_close) to fh results in undefined behavior.

Parameters

[in] fh pointer to a BDIO file descriptor structure

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int bdio_flush_record ( BDIO * fh )

Finalize the current record and set fh to BDIO_N_STATE.

If fh is open in write/append mode:
If state is BDIO_R_STATE, the current record is finalized by flushing, writing the length into the record-header, moving the file pointer to the end of the file and changing the state to BDIO_N_STATE

If state is BDIO_H_STATE, the header record is finalized by flushing and setting the state to BDIO_N_STATE

If state is BDIO_N_STATE, nothing is done

A call to this function is usually not necessary. A call is advised only before engaging in operations that may lead to a crash or early termination, But even then, calling bdio_close would be preferred.

Fails if

fh is a null pointer
fh is in state BDIO_E_STATE
fh is not in write/append mode
fflush, ftell, fwrite or fseek fail
Returns
Upon successful completion 0 is returned. Otherwise, EOF is returned.

Parameters

[in] fh pointer to a BDIO file descriptor structure.

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int bdio_get_hcdate ( BDIO * fh )

Get the time of creation of the last header.

Fails if fh is invalid or in error state

Returns: unix time (seconds since Jan 01 1970)

Parameters

[in] fh pointer to a BDIO file descriptor structure.

char* bdio_get_hchost ( BDIO * fh )

Get the host on which the last header was created.

Fails if fh is invalid or in error state

Returns: 0-terminated string with a host name

Parameters

[in] fh pointer to a BDIO file descriptor structure.

int bdio_get_hcnt ( BDIO * fh )

Get number of headers read or written so far (including current)

Fails if fh is a null pointer or if fh is in state BDIO_E_STATE

Returns: Upon success the number of headers is returned. Upon failure EOF is returned.

Parameters

[in] fh pointer to a BDIO file descriptor structure.

char* bdio_get_hcuser ( BDIO * fh )

Get the user name who created the last header.

Fails if fh is invalid or in error state

Returns: 0-terminated string with a user name

Parameters

[in] fh pointer to a BDIO file descriptor structure.

int bdio_get_hmdate ( BDIO * fh )

Get the time of the most recent modification of the last header.

Fails if fh is invalid or in error state

Returns: unix time (seconds since Jan 01 1970)

Parameters

[in] fh pointer to a BDIO file descriptor structure.

char* bdio_get_hmhost ( BDIO * fh )

Get the host on which the last header was most recently modified.

Fails if fh is invalid or in error state

Returns: 0-terminated string with a host name

Parameters

[in] fh pointer to a BDIO file descriptor structure.

char* bdio_get_hmuser ( BDIO * fh )

Get the user name who modified the last header most recently.

Fails if fh is invalid or in error state

Returns: 0-terminated string with a user name

Parameters

[in] fh pointer to a BDIO file descriptor structure.

char* bdio_get_hpinfo ( BDIO * fh )

Get the protocol info of the last header.

Fails if fh is invalid or in error state

Returns: 0-terminated string with a protocol info

Parameters

[in] fh pointer to a BDIO file descriptor structure.

int bdio_get_hversion ( BDIO * fh )

Get version number in last header.

Fails if fh is invalid or in error state

Returns: Upon success the integer version number is returned. Upon failure EOF is returned

Parameters

[in] fh pointer to a BDIO file descriptor structure.

int bdio_get_rcnt ( BDIO * fh )

Get number of records read or written so far (including current)

Fails if fh is a null pointer or if fh is in state BDIO_E_STATE

Returns: Upon success the number of records is returned. Upon failure EOF is returned.

Parameters

[in] fh pointer to a BDIO file descriptor structure.

int bdio_get_rfmt ( BDIO * fh )

Get format of current record (written or read).

Fails if fh is a null pointer or if fh is not in state BDIO_R_STATE

Returns: If fh is in state BDIO_R_STATE the format of the record is returned.
If fh is not in a record or if an error occurs, EOF is returned.

Parameters

[in] fh pointer to a BDIO file descriptor structure.

uint64_t bdio_get_rlen ( BDIO * fh )

Get length of data content of current record (written or read).

Fails if fh if is a null pointer or if fh is in state BDIO_E_STATE

Returns: Upon success the length is returned. Upon failure EOF is returned.
If fh is currently not in a record, 0 is returned

Parameters

[in] fh pointer to a BDIO file descriptor structure.

int bdio_get_ruinfo ( BDIO * fh )

Get the user info of the current record.

Fails if fh is invalid or in error state

Returns: user info, integer between 0 and 15

Parameters

[in] fh pointer to a BDIO file descriptor structure.

int bdio_is_in_header ( BDIO * fh )

Returns 1 if fh is in a header and 0 otherwise.

Fails if fh is invalid

Returns: 1 if fh->state is BDIO_H_STATE and 0 otherwise

Parameters

[in] fh pointer to a BDIO file descriptor structure

int bdio_is_in_record ( BDIO * fh )

Returns 1 if fh is in a record and 0 otherwise.

Fails if fh is invalid

Returns: 1 if fh->state is BDIO_R_STATE and 0 otherwise

Parameters

[in] fh pointer to a BDIO file descriptor structure

BDIO* bdio_open	(	const char *	file,
		const char *	mode,
		char *	protocol_info
	)

Open a bdio file in mode 'r' (read), 'w' (write) or 'a' (append).

In read mode, the header record is read and checked. The stream remains positioned in the header record, therefore bdio_seek_record must be called to enter the next record. protocol_info may be NULL, but if it is not NULL, it must match the protocol_info string of the first header.

In write mode, the header record is written. The stream remains positioned in the header record, therefore bdio_start_record must be called to start a new record. protocol_info must be a 0-terminated string (at least "").

In append mode, the header records are read and checked. The stream is positioned at the end of the last header or after the last record, therefore bdio_start_record or bdio_append_record (only possible if the last item was a record) must be called to start a new record. If the file is not empty, protocol_info may be NULL - if not NULL it must match the one of the last header. If the file is empty, protocol_info must be a 0-terminated string.

The maximal length protocol_info may have is: XXXX TODO <–

bdio_open fails if

there is not enough memory for the buffers,
an invalid mode was specified,
the machine has an unknown endianness,
there was an I/O error during reading/writing of the header,
the header is not a valid bdio header,
protocol_info fails to fulfill the requirements,

fopen, fclose, fwrite, fread, ftell fail for some reason.

Returns: Upon successful completion bdio_open returns a pointer to a bdio file structure. Otherwise, NULL is returned

Parameters

[in]	file	0-terminated string specifying the file name
[in]	mode	a bdio file mode, can be BDIO_R_MODE, BDIO_W_MODE or BDIO_A_MODE
[in]	protocol_info	0-terminated string specifying the protocol-info

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void bdio_perror	(	const char *	s,
		BDIO *	fh
	)

Print an error string to BDIO.msg.

Print the string pointed to by s followed by the description of the last error that occured to BDIO.msg.
If s is NULL, only the description of the last error is printed.

The function fails if fh is invalid or if the error-stream associated with fh is invalid.

Parameters

[in]	s	0-terminated string with user-provided error message
[in]	fh	pointer to a BDIO file descriptor structure

void bdio_pferror	(	const char *	s,
		BDIO *	fh
	)

Print an error string to BDIO.msg.

Print the string pointed to by s followed by the description of the first error that occured to BDIO.msg.
If s is NULL, only the description of the first error is printed.

The function fails if fh is invalid or if the error-stream associated with fh is invalid.

Parameters

[in]	s	0-terminated string with user-provided error message
[in]	fh	pointer to a BDIO file descriptor structure

size_t bdio_read	(	void *	buf,
		size_t	nb,
		BDIO *	fh
	)

Read nb bytes from fh into buf.

Independent of the endiannes of the machine and the record type, exactly the bytes from the file are copied. If a byte-swap is necessary, the user is responsible for doing it.

Fails if -fh is a null pointer -fh is in state BDIO_E_STATE -fh is not in read mode -nb is too large -fread fails

Returns: Returns the number of bytes read.
If an error occurs, or the end of the current record or the file is reached, the return value is a short item count (or zero).

Parameters

[in]	buf	pointer to a location where the read data is copied to.
[in]	nb	number of bytes to be read.
[in]	fh	pointer to a BDIO file descriptor structure.

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size_t bdio_read_f32	(	float *	buf,
		size_t	nb,
		BDIO *	fh
	)

brief Read nb bytes from fh into buf. nb must be a multiple of 4.

If the endianness of the machine differs from the one of the current record, the byte order of the read data is swapped. If this swapping is not desired the general bdio_read should be used.

Fails if

fh is a null pointer
fh is in state BDIO_E_STATE
bdio_fread fails
Returns
Returns the number of bytes read.
If an error occurs, or the end of the current record or the file is reached, the return value is a short item count (or zero).

Parameters

[in] buf float-pointer to a location where the read data is copied to.

[in] nb number of bytes to be read (multiple of 4).

[in] fh pointer to a BDIO file descriptor structure.

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size_t bdio_read_f64	(	double *	buf,
		size_t	nb,
		BDIO *	fh
	)

brief Read nb bytes from fh into buf. nb must be a multiple of 8.

If the endianness of the machine differs from the one of the current record, the byte order of the read data is swapped. If this swapping is not desired the general bdio_read should be used.

Fails if

fh is a null pointer
fh is in state BDIO_E_STATE
bdio_fread fails
Returns
Returns the number of bytes read.
If an error occurs, or the end of the current record or the file is reached, the return value is a short item count (or zero).

Parameters

[in] buf double-pointer to a location where the read data is copied to.

[in] nb number of bytes to be read (multiple of 8).

[in] fh pointer to a BDIO file descriptor structure.

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size_t bdio_read_int32	(	int32_t *	buf,
		size_t	nb,
		BDIO *	fh
	)

brief Read nb bytes from fh into buf. nb must be a multiple of 4.

If the endianness of the machine differs from the one of the current record, the byte order of the read data is swapped. If this swapping is not desired the general bdio_read should be used.

Fails if

fh is a null pointer
fh is in state BDIO_E_STATE
bdio_fread fails
Returns
Returns the number of bytes read.
If an error occurs, or the end of the current record or the file is reached, the return value is a short item count (or zero).

Parameters

[in] buf int32_t-pointer to a location where the read data is copied to.

[in] nb number of bytes to be read (multiple of 4).

[in] fh pointer to a BDIO file descriptor structure.

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size_t bdio_read_int64	(	int64_t *	buf,
		size_t	nb,
		BDIO *	fh
	)

brief Read nb bytes from fh into buf. nb must be a multiple of 8.

If the endianness of the machine differs from the one of the current record, the byte order of the read data is swapped. If this swapping is not desired the general bdio_read should be used.

Fails if

fh is a null pointer
fh is in state BDIO_E_STATE
bdio_fread fails
Returns
Returns the number of bytes read.
If an error occurs, or the end of the current record or the file is reached, the return value is a short item count (or zero).

Parameters

[in] buf int64_t-pointer to a location where the read data is copied to.

[in] nb number of bytes to be read (multiple of 8).

[in] fh pointer to a BDIO file descriptor structure.

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int bdio_seek_record ( BDIO * fh )

Position bdio stream to start of next record and read its header.

fails if

fh is a null pointer
fh is in state BDIO_E_STATE
fh is not in read mode
fseek or fread fail
Returns
Upon success 0 is returned, otherwise EOF is returned. Upon end of file, EOF is returned.

Parameters

[in] fh pointer to a BDIO file descriptor structure.

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void bdio_set_dflt_msg ( FILE * stream )

Set the default stream for error messages.

Parameters

[in] stream pointer to a file into which error messages should be printed by default for any newly opened bdio file.

void bdio_set_dflt_verbose ( int v )

Change the behavior for reporting of errors.

Set the default for newly opened bdio files to verbose (v !=0 ) or silent (v==0)

Fails if v is negative

Parameters

[in] v new default behavior

int bdio_set_msg	(	FILE *	stream,
		BDIO *	fh
	)

Set the stream for error messages in fh to stream.

Fails if fh is invalid or stream is NULL

Returns: Upon successfull completion 0 is returned. Otherwise EOF is returned.

Parameters

[in]	stream	pointer to a file into which error messages associated with bdio file fh are printed
[in]	fh	pointer to a BDIO file descriptor structure.

int bdio_set_verbose	(	int	v,
		BDIO *	fh
	)

Set bdio file fh to verbose (v>0) or silent (v==0)

Fails if fh is invalid or in error state or v is negative

Returns: Upon successfull completion 0 is returned. Otherwise EOF is returned

Parameters

[in]	v	v==0 means silent mode and v>0 means verbose mode
[in]	fh	pointer to a BDIO file descriptor structure.

int bdio_start_record	(	int	fmt,
		int	uinfo,
		BDIO *	fh
	)

Position bdio stream after the current record and start writing a new record with specified format and uinfo.

Fails if

fh is a null pointer
fh is in state BDIO_E_STATE
fh is not in write/append mode
fmt has an illegal value
info has an illegal value
the endianness of the system can not be determined

bdio_flush_record fails

Returns: Upon success 0 is returned, otherwise EOF is returned.

Parameters

[in]

fmt

supported formats are

format	content
BDIO_ASC_EXEC	for ASCII data containing shell scripts
BDIO_ASC_XML	for ASCII data containing XML
BDIO_ASC_GENERIC	for generic ASCII data
BDIO_BIN_GENERIC	for generic binary data
BDIO_BIN_INT32BE	for big endian 32 bit integers
BDIO_BIN_INT32LE	for little endian 32 bit integers
BDIO_BIN_INT64BE	for big endian 64 bit integers
BDIO_BIN_INT64LE	for little endian 64 bit integers
BDIO_BIN_F32BE	for big endian single precision floats
BDIO_BIN_F32LE	for little endian single precision floats
BDIO_BIN_F64BE	for big endian double precision floats
BDIO_BIN_F64LE	for little endian double precision floats
BDIO_BIN_INT32	for 32 bit integers stored in machine endianness
BDIO_BIN_INT64	for 64 bit integers stored in machine endianness
BDIO_BIN_F32	for single precision floats in machine endianness
BDIO_BIN_F64	for double precision floats in machine endianness

[in] uinfo is a number between 0 and 15 specified by the user.

[in] fh pointer to a BDIO file descriptor structure.

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size_t bdio_write	(	void *	ptr,
		size_t	nb,
		BDIO *	fh
	)

Write nb bytes from ptr to fh.

nb must be a multiple of the record's data-type-size (e.g. multiple of 8 for BDIO_BIN_F64) Independent of the endianness of the current record, EXACTLY the data pointed to by ptr is written into the file. The user is responsible for the correct byte order. If automatic correct byte ordering is desired, the functions bdio_write_f32, bdio_write_f64, bdio_write_i32 and bdio_write_i64 should be used.

Fails if

fh if is a null pointer
fh is in state BDIO_E_STATE
fh is not in write/append mode

fwrite fails

Returns: Returns number of bytes written. If an error occurs the return value is a short item count (or zero).

Parameters

[in]	ptr	pointer to data which is to be written.
[in]	nb	number of bytes to be written. Must be a multiple of the size of the record's data-type. E.g. multiple of 4 for BDIO_BIN_F32 records.
[in]	fh	pointer to a BDIO file descriptor structure.

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size_t bdio_write_f32	(	float *	ptr,
		size_t	nb,
		BDIO *	fh
	)

Write nb bytes from ptr to fh.

nb must be a multiple of 4. If the endiannes of the machine differs from the one of the current record, the byte order of the data in ptr is swapped before writing. If this automatic swapping is not desired, the general bdio_write should be used.

Fails if

fh if is a null pointer
fh is in state BDIO_E_STATE
bdio_write fails
Returns
Returns number of bytes written. If an error occurs the return value is a short item count (or zero).

Parameters

[in] ptr pointer to float data which is to be written.

[in] nb number of bytes to be written. Must be a multiple of 4.

[in] fh pointer to a BDIO file descriptor structure.

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size_t bdio_write_f64	(	double *	ptr,
		size_t	nb,
		BDIO *	fh
	)

Write nb bytes from ptr to fh.

nb must be a multiple of 8. If the endiannes of the machine differs from the one of the current record, the byte order of the data in ptr is swapped before writing. If this automatic swapping is not desired, the general bdio_write should be used.

Fails if

fh if is a null pointer
fh is in state BDIO_E_STATE
bdio_write fails
Returns
Returns number of bytes written. If an error occurs the return value is a short item count (or zero).

Parameters

[in] ptr pointer to double data which is to be written.

[in] nb number of bytes to be written. Must be a multiple of 8.

[in] fh pointer to a BDIO file descriptor structure.

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size_t bdio_write_int32	(	int32_t *	ptr,
		size_t	nb,
		BDIO *	fh
	)

Write nb bytes from ptr to fh.

nb must be a multiple of 4. If the endiannes of the machine differs from the one of the current record, the byte order of the data in ptr is swapped before writing. If this automatic swapping is not desired, the general bdio_write should be used.

Fails if

fh if is a null pointer
fh is in state BDIO_E_STATE
bdio_write fails
Returns
Returns number of bytes written. If an error occurs the return value is a short item count (or zero).

Parameters

[in] ptr pointer to int32_t data which is to be written.

[in] nb number of bytes to be written. Must be a multiple of 4.

[in] fh pointer to a BDIO file descriptor structure.

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size_t bdio_write_int64	(	int64_t *	ptr,
		size_t	nb,
		BDIO *	fh
	)

Write nb bytes from ptr to fh.

nb must be a multiple of 8. If the endiannes of the machine differs from the one of the current record, the byte order of the data in ptr is swapped before writing. If this automatic swapping is not desired, the general bdio_write should be used.

Fails if

fh if is a null pointer
fh is in state BDIO_E_STATE
bdio_write fails
Returns
Returns number of bytes written. If an error occurs the return value is a short item count (or zero).

Parameters

[in] ptr pointer to int64_t data which is to be written.

[in] nb number of bytes to be written. Must be a multiple of 8.

[in] fh pointer to a BDIO file descriptor structure.

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[in]	buf	float-pointer to a location where the read data is copied to.
[in]	nb	number of bytes to be read (multiple of 4).
[in]	fh	pointer to a BDIO file descriptor structure.

[in]	buf	double-pointer to a location where the read data is copied to.
[in]	nb	number of bytes to be read (multiple of 8).
[in]	fh	pointer to a BDIO file descriptor structure.

[in]	buf	int32_t-pointer to a location where the read data is copied to.
[in]	nb	number of bytes to be read (multiple of 4).
[in]	fh	pointer to a BDIO file descriptor structure.

[in]	buf	int64_t-pointer to a location where the read data is copied to.
[in]	nb	number of bytes to be read (multiple of 8).
[in]	fh	pointer to a BDIO file descriptor structure.

[in]	ptr	pointer to float data which is to be written.
[in]	nb	number of bytes to be written. Must be a multiple of 4.
[in]	fh	pointer to a BDIO file descriptor structure.

[in]	ptr	pointer to double data which is to be written.
[in]	nb	number of bytes to be written. Must be a multiple of 8.
[in]	fh	pointer to a BDIO file descriptor structure.

[in]	ptr	pointer to int32_t data which is to be written.
[in]	nb	number of bytes to be written. Must be a multiple of 4.
[in]	fh	pointer to a BDIO file descriptor structure.

[in]	ptr	pointer to int64_t data which is to be written.
[in]	nb	number of bytes to be written. Must be a multiple of 8.
[in]	fh	pointer to a BDIO file descriptor structure.

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