/usr/include/drstemplates.h is in libgrib2c-dev 1.6.0-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | #ifndef _drstemplates_H
#define _drstemplates_H
#include "grib2.h"
// PRGMMR: Gilbert ORG: W/NP11 DATE: 2002-10-26
//
// ABSTRACT: This Fortran Module contains info on all the available
// GRIB2 Data Representation Templates used in Section 5 (DRS).
// The information decribing each template is stored in the
// drstemplate structure defined below.
//
// Each Template has three parts: The number of entries in the template
// (mapdrslen); A map of the template (mapdrs), which contains the
// number of octets in which to pack each of the template values; and
// a logical value (needext) that indicates whether the Template needs
// to be extended. In some cases the number of entries in a template
// can vary depending upon values specified in the "static" part of
// the template. ( See Template 5.1 as an example )
//
// NOTE: Array mapdrs contains the number of octets in which the
// corresponding template values will be stored. A negative value in
// mapdrs is used to indicate that the corresponding template entry can
// contain negative values. This information is used later when packing
// (or unpacking) the template data values. Negative data values in GRIB
// are stored with the left most bit set to one, and a negative number
// of octets value in mapdrs[] indicates that this possibility should
// be considered. The number of octets used to store the data value
// in this case would be the absolute value of the negative value in
// mapdrs[].
//
//
///////////////////////////////////////////////////////////////////////
#define MAXDRSTEMP 9 // maximum number of templates
#define MAXDRSMAPLEN 200 // maximum template map length
struct drstemplate
{
g2int template_num;
g2int mapdrslen;
g2int needext;
g2int mapdrs[MAXDRSMAPLEN];
};
const struct drstemplate templatesdrs[MAXDRSTEMP] = {
// 5.0: Grid point data - Simple Packing
{ 0, 5, 0, {4,-2,-2,1,1} },
// 5.2: Grid point data - Complex Packing
{ 2, 16, 0, {4,-2,-2,1,1,1,1,4,4,4,1,1,4,1,4,1} },
// 5.3: Grid point data - Complex Packing and spatial differencing
{ 3, 18, 0, {4,-2,-2,1,1,1,1,4,4,4,1,1,4,1,4,1,1,1} },
// 5.50: Spectral Data - Simple Packing
{ 50, 5, 0, {4,-2,-2,1,4} },
// 5.51: Spherical Harmonics data - Complex packing
{ 51, 10, 0, {4,-2,-2,1,-4,2,2,2,4,1} },
// // 5.1: Matrix values at gridpoint - Simple packing
// { 1, 15, 1, {4,-2,-2,1,1,1,4,2,2,1,1,1,1,1,1} },
// 5.40: Grid point data - JPEG2000 encoding
{ 40, 7, 0, {4,-2,-2,1,1,1,1} },
// 5.41: Grid point data - PNG encoding
{ 41, 5, 0, {4,-2,-2,1,1} },
// 5.40000: Grid point data - JPEG2000 encoding
{ 40000, 7, 0, {4,-2,-2,1,1,1,1} },
// 5.40010: Grid point data - PNG encoding
{ 40010, 5, 0, {4,-2,-2,1,1} }
} ;
#endif /* _drstemplates_H */
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