NAME

       drstemplates.h - This C struct contains info on all the available GRIB2 Data
       Representation Templates used in Section 5 (DRS).

SYNOPSIS

       #include 'grib2.h'

   Data Structures
       struct drstemplate
           Stuct for GRIB2 Data Representation Section (DRS) template.

   Macros
       #define MAXDRSMAPLEN   200
           maximum template map length
       #define MAXDRSTEMP   9
           maximum number of templates

   Variables
       const struct drstemplate templatesdrs [MAXDRSTEMP]
           Stuct holding data for GRIB2 Data Representation Section (DRS) template.

Detailed Description

       This C struct 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.

       Author
           Stephen Gilbeert

       Date
           2002-10-26

       Definition in file drstemplates.h.

Data Type Documentation

struct drstemplate

       Stuct for GRIB2 Data Representation Section (DRS) template.

       Definition at line 39 of file drstemplates.h.

       Data Fields:
           g2int mapdrs[MAXDRSMAPLEN] A map of the template.

           g2int mapdrslen Length of map of the template.

           g2int needext Whether the Template needs to be extended.

           g2int template_num The number of entries in the template.

Macro Definition Documentation

   #define MAXDRSMAPLEN   200
       maximum template map length

       Definition at line 34 of file drstemplates.h.

   #define MAXDRSTEMP   9
       maximum number of templates

       Definition at line 33 of file drstemplates.h.

Variable Documentation

   const struct drstemplate templatesdrs[MAXDRSTEMP]
       Initial value:

       = {

           { 0, 5, 0, {4,-2,-2,1,1} },

           { 2, 16, 0, {4,-2,-2,1,1,1,1,4,4,4,1,1,4,1,4,1} },

           { 3, 18, 0, {4,-2,-2,1,1,1,1,4,4,4,1,1,4,1,4,1,1,1} },

           { 50, 5, 0, {4,-2,-2,1,4} },

           { 51, 10, 0, {4,-2,-2,1,-4,2,2,2,4,1} },

           { 40, 7, 0, {4,-2,-2,1,1,1,1} },

           { 41, 5, 0, {4,-2,-2,1,1} },

           { 40000, 7, 0, {4,-2,-2,1,1,1,1} },

           { 40010, 5, 0, {4,-2,-2,1,1} }
       }

       Stuct holding data for GRIB2 Data Representation Section (DRS) template.

       Definition at line 1 of file drstemplates.h.

       Referenced by getdrsindex(), and getdrstemplate().

Author

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