aecunpack.c File Reference

Unpack a data field that was packed with AEC compression. More...

#include <stdio.h>
#include <stdlib.h>
#include "grib2_int.h"

Go to the source code of this file.

Functions
g2int	aecunpack (unsigned char *cpack, g2int len, g2int *idrstmpl, g2int ndpts, float *fld)
	Unpack AEC compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.42. More...
static int	aecunpack_int (unsigned char *cpack, g2int len, g2int *idrstmpl, g2int ndpts, void *fld, int fld_is_double, int verbose)
	This internal function will unpack AEC compressed data into an array of floats or doubles, using info from the GRIB2 Data Representation Template 5.42. More...
int	g2c_aecunpackd (unsigned char *cpack, size_t len, int *idrstmpl, size_t ndpts, double *fld)
	Unpack AEC compressed data into an array of doubles, using info from the GRIB2 Data Representation Template 5.42. More...
int	g2c_aecunpackf (unsigned char *cpack, size_t len, int *idrstmpl, size_t ndpts, float *fld)
	Unpack AEC compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.42. More...

Detailed Description

Unpack a data field that was packed with AEC compression.

stream

Author

Eric Engle

Date

2023-10-16

Definition in file aecunpack.c.

Function Documentation

aecunpack()

g2int aecunpack	(	unsigned char *	cpack,
		g2int	len,
		g2int *	idrstmpl,
		g2int	ndpts,
		float *	fld
	)

Unpack AEC compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.42.

Parameters

cpack	The packed data.
len	The length of the packed data.
idrstmpl	Pointer to array of values for Data Representation Template 5.42.
ndpts	The number of data values to unpack.
fld	A pointer that gets the unpacked data values as an array of float.

Returns

• G2C_NOERROR No error.

Author

Eric Engle

Date

2023-10-16

Definition at line 139 of file aecunpack.c.

References aecunpack_int(), and LOG.

Referenced by g2c_unpack7_int().

aecunpack_int()

static int aecunpack_int ( unsigned char *  cpack, g2int  len, g2int *  idrstmpl, g2int  ndpts, void *  fld, int  fld_is_double, int  verbose  )

static

This internal function will unpack AEC compressed data into an array of floats or doubles, using info from the GRIB2 Data Representation Template 5.42.

This function is used by aecunpack(), g2c_aecunpackf(), and g2c_aecunpackd().

Parameters

cpack	The packed data.
len	The length of the packed data.
idrstmpl	Pointer to array of values for Data Representation Template 5.42.
ndpts	The number of data values to unpack.
fld	A pointer that gets the unpacked data values.
fld_is_double	Non-zero if the data are to be unpacked into a double array, otherwise data will be unpacked into a float array.
verbose	If non-zero, error messages will be printed in case of error. Otherwise, error codes will be return but no error messages printed. Calls to the original g2c API may cause error messages to be printed in case of error. For the new g2c_ API, no error messages will be printed - instead an error code will be returned. Call g2c_strerror() to get the error message for any error code.

Returns

• G2C_NOERROR No error.
• G2C_ENOMEM Out of memory.

Author

Eric Engle

Date

2023-10-16

Definition at line 43 of file aecunpack.c.

References dec_aec(), G2C_ENOMEM, G2C_NOERROR, gbits(), int_power(), LOG, and rdieee().

Referenced by aecunpack(), g2c_aecunpackd(), and g2c_aecunpackf().

g2c_aecunpackd()

int g2c_aecunpackd	(	unsigned char *	cpack,
		size_t	len,
		int *	idrstmpl,
		size_t	ndpts,
		double *	fld
	)

Unpack AEC compressed data into an array of doubles, using info from the GRIB2 Data Representation Template 5.42.

This function is the V2 API version of aecunpack() for doubles.

Parameters

cpack	The packed data.
len	The length of the packed data.
idrstmpl	Pointer to array of values for Data Representation Template 5.42.
ndpts	The number of data values to unpack.
fld	A pointer that gets the unpacked data values as an array of double.

Returns

• G2C_NOERROR No error.
• G2C_ENOMEM Out of memory.

Author

Eric Engle

Date

2023-10-16

Definition at line 210 of file aecunpack.c.

References aecunpack_int(), G2C_AEC_DRS_TEMPLATE_LEN, and LOG.

g2c_aecunpackf()

int g2c_aecunpackf	(	unsigned char *	cpack,
		size_t	len,
		int *	idrstmpl,
		size_t	ndpts,
		float *	fld
	)

Unpack AEC compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.42.

Parameters

cpack	The packed data.
len	The length of the packed data.
idrstmpl	Pointer to array of values for Data Representation Template 5.42.
ndpts	The number of data values to unpack.
fld	A pointer that gets the unpacked data values as an array of float.

Returns

• G2C_NOERROR No error.
• G2C_ENOMEM Out of memory.

Author

Eric Engle

Date

2022-10-16

Definition at line 172 of file aecunpack.c.

References aecunpack_int(), G2C_AEC_DRS_TEMPLATE_LEN, and LOG.