Man page - pngunpack_int(3)
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apt-get install libg2c-dev
Manual
pngunpack.c
NAMESYNOPSIS
Functions
Detailed Description
Function Documentation
int g2c_pngunpackd (unsigned char * cpack, size_t len, int * idrstmpl,size_t ndpts, double * fld)
int g2c_pngunpackf (unsigned char * cpack, size_t len, int * idrstmpl,size_t ndpts, float * fld)
g2int pngunpack (unsigned char * cpack, g2int len, g2int * idrstmpl, g2intndpts, float * fld)
static int pngunpack_int (unsigned char * cpack, g2int len, g2int *idrstmpl, g2int ndpts, void * fld, int fld_is_double, int verbose)[static]
Author
NAME
pngunpack.c - Unpack data packed with PNG compression.
SYNOPSIS
#include
’grib2_int.h’
#include <stdio.h>
#include <stdlib.h>
Functions
int
g2c_pngunpackd
(unsigned char *cpack, size_t len, int
*idrstmpl, size_t ndpts, double *fld)
This subroutine unpacks a data field that was packed into a
PNG image format using info from the GRIB2 Data
Representation Template 5.41 or 5.40010.
int
g2c_pngunpackf
(unsigned char *cpack, size_t len,
int *idrstmpl, size_t ndpts, float *fld)
This subroutine unpacks a data field that was packed into a
PNG image format using info from the GRIB2 Data
Representation Template 5.41 or 5.40010.
g2int pngunpack
(unsigned char *cpack,
g2int
len,
g2int
*idrstmpl,
g2int
ndpts, float *fld)
This subroutine unpacks a data field that was packed into a
PNG image format using info from the GRIB2 Data
Representation Template 5.41 or 5.40010.
static int
pngunpack_int
(unsigned char *cpack,
g2int
len,
g2int
*idrstmpl,
g2int
ndpts, void *fld, int fld_is_double, int verbose)
Unpack a data field that was packed into a PNG image format
using info from the GRIB2 Data Representation Template 5.41
or 5.40010.
Detailed Description
Unpack data packed with PNG compression.
Author
Stephen Gilbert
Date
2003-08-27
Definition in file pngunpack.c .
Function Documentation
int g2c_pngunpackd (unsigned char * cpack, size_t len, int * idrstmpl,size_t ndpts, double * fld)
This subroutine unpacks a data field that was packed into a PNG image format using info from the GRIB2 Data Representation Template 5.41 or 5.40010.
Parameters
cpack
The packed data
field (character*1 array).
len
length of packed field cpack().
idrstmpl
Pointer to array of values for Data
Representation
Template 5.41
or 5.40010.
ndpts
The number of data values to unpack.
fld
Contains the unpacked data values.
Returns
|
• |
G2C_NOERROR No Error. |
|||
|
• |
G2C_ENOMEM Out of memory. |
Author
Ed Hartnett
Date
Aug 8, 2022
Definition at line 188 of file pngunpack.c .
References G2C_PNG_DRS_TEMPLATE_LEN , and pngunpack_int() .
int g2c_pngunpackf (unsigned char * cpack, size_t len, int * idrstmpl,size_t ndpts, float * fld)
This subroutine unpacks a data field that was packed into a PNG image format using info from the GRIB2 Data Representation Template 5.41 or 5.40010.
Parameters
cpack
The packed data
field (character*1 array).
len
length of packed field cpack().
idrstmpl
Pointer to array of values for Data
Representation
Template 5.41
or 5.40010.
ndpts
The number of data values to unpack.
fld
Contains the unpacked data values.
Returns
|
• |
G2C_NOERROR No Error. |
|||
|
• |
G2C_ENOMEM Out of memory. |
Author
Ed Hartnett
Date
Sep 8, 2022
Definition at line 156 of file pngunpack.c .
References G2C_PNG_DRS_TEMPLATE_LEN , and pngunpack_int() .
g2int pngunpack (unsigned char * cpack, g2int len, g2int * idrstmpl, g2intndpts, float * fld)
This subroutine unpacks a data field that was packed into a PNG image format using info from the GRIB2 Data Representation Template 5.41 or 5.40010.
Parameters
cpack
The packed data
field (character*1 array).
len
length of packed field cpack().
idrstmpl
Pointer to array of values for Data
Representation
Template 5.41
or 5.40010.
ndpts
The number of data values to unpack.
fld
Contains the unpacked data values.
Returns
|
• |
G2C_NOERROR No error. |
|||
|
• |
G2_JPCUNPACK_MEM Out of memory. |
Author
Stephen Gilbert
Date
2003-08-27
Author
Ed Hartnett
Definition at line 126 of file pngunpack.c .
References G2_JPCUNPACK_MEM , G2C_ENOMEM , and pngunpack_int() .
Referenced by g2c_unpack7_int() .
static int pngunpack_int (unsigned char * cpack, g2int len, g2int *idrstmpl, g2int ndpts, void * fld, int fld_is_double, int verbose)[static]
Unpack a data field that was packed into a PNG image format using info from the GRIB2 Data Representation Template 5.41 or 5.40010.
Parameters
cpack
The packed data
field (character*1 array).
len
The length of packed field cpack().
idrstmpl
Pointer to array of values for Data
Representation
Template 5.41
or 5.40010.
ndpts
The number of data values to unpack.
fld
Pointer that will get the unpacked data values.
fld_is_double
If non-zero, then fld will get data as
double, otherwise float.
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
Stephen Gilbert, Ed Hartnett
Date
Aug 8, 2022
Definition at line 40 of file pngunpack.c .
References dec_png() , G2C_ENOMEM , gbits() , int_power() , LOG , and rdieee() .
Referenced by g2c_pngunpackd() , g2c_pngunpackf() , and pngunpack() .
Author
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