wreport::_Varinfo Struct Reference

Information about a variable. More...

#include <varinfo.h>

Public Member Functions
int	encode_decimal (double fval) const
	Encode a double value into a decimal integer value using Varinfo decimal encoding informations (scale)
double	round_decimal (double val) const
	Round val so that it only fits the significant digits given in scale.
uint32_t	encode_binary (double fval) const
	Encode a double value into a positive integer value using Varinfo binary encoding informations (bit_ref and scale)
double	decode_decimal (int val) const
	Decode a double value from a decimal integer value using Varinfo decimal encoding informations (scale)
double	decode_binary (uint32_t val) const
	Decode a double value from a decimal integer value using Varinfo binary encoding informations (bit_ref and scale)
void	set_bufr (Varcode code, const char *desc, const char *unit, int scale=0, unsigned len=0, int bit_ref=0, int bit_len=0)
	Set all the base Varinfo fields, then call compute_range.
void	set_crex (Varcode code, const char *desc, const char *unit, int scale=0, unsigned len=0)
	Set all the base Varinfo fields, then call compute_range.
void	set_string (Varcode code, const char *desc, unsigned len)
	Set all the fields to represent a string variable.
void	set_binary (Varcode code, const char *desc, unsigned bit_len)
	Set all the fields to represent an opaque binary variable.
void	compute_range ()
	Compute the widest ranges for imin, imax, dmin and dmax that can fit any value that can be encoded both with (scale, len) and with (scale, bit_ref, bit_len)

Data Fields
Varcode	code
	Variable code, as in WMO BUFR/CREX table B.
Vartype	type
	Type of the value stored in the variable.
char	desc [64]
	Freeform variable description.
char	unit [24]
	Measurement unit of the variable, using the units defined in WMO BUFR/CREX table B.
int	scale
	Scale of the variable, defining its decimal precision.
unsigned	len
	Length in digits of the variable encoded as a decimal integer.
int	bit_ref
	Binary reference value for the variable.
unsigned	bit_len
	Length in bits of the variable when encoded as an unsigned binary value.
int	imin
	Minimum unscaled decimal integer value the field can have.
int	imax
	Minimum unscaled decimal integer value the field can have.
double	dmin
	Minimum value the field can have.
double	dmax
	Maximum value the field can have.

Detailed Description

Information about a variable.

The normal value of a variable is considered expressed in unit

Member Function Documentation

decode_binary()

double wreport::_Varinfo::decode_binary

(

uint32_t

val

)

const

Decode a double value from a decimal integer value using Varinfo binary encoding informations (bit_ref and scale)

Parameters

val	Value to decode

Returns

The decoded double value

decode_decimal()

double wreport::_Varinfo::decode_decimal

(

int

val

)

const

Decode a double value from a decimal integer value using Varinfo decimal encoding informations (scale)

Parameters

val	Value to decode

Returns

The decoded double value

encode_binary()

uint32_t wreport::_Varinfo::encode_binary

(

double

fval

)

const

Encode a double value into a positive integer value using Varinfo binary encoding informations (bit_ref and scale)

Parameters

fval	Value to encode

Returns

The double value encoded as an unsigned integer

encode_decimal()

int wreport::_Varinfo::encode_decimal

(

double

fval

)

const

Encode a double value into a decimal integer value using Varinfo decimal encoding informations (scale)

Parameters

fval	Value to encode

Returns

The double value encoded as an integer

set_binary()

void wreport::_Varinfo::set_binary	(	Varcode	code,
		const char *	desc,
		unsigned	bit_len
	)

Set all the fields to represent an opaque binary variable.

Parameters

code	the variable code
desc	the variable description
bit_len	the variable length in bits

set_string()

void wreport::_Varinfo::set_string	(	Varcode	code,
		const char *	desc,
		unsigned	len
	)

Set all the fields to represent a string variable.

Parameters

code	the variable code
desc	the variable description
len	the maximum string length

Field Documentation

bit_ref

int wreport::_Varinfo::bit_ref

Binary reference value for the variable.

The value of the variable can be encoded as an unsigned binary value by computing value * exp10(scale) + bit_ref.

scale

int wreport::_Varinfo::scale

Scale of the variable, defining its decimal precision.

The value of the variable can be encoded as a decimal integer by computing value * exp10(scale).

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The documentation for this struct was generated from the following file:

• varinfo.h