#ifndef _grib2_H #define _grib2_H #include #define G2_VERSION "g2clib-1.1.7" /* . . . . // PRGMMR: Gilbert ORG: W/NP11 DATE: 2002-10-25 // // Each element of structure gribfield is defined as: // // gribfield gfld; // // gfld->version = GRIB edition number ( currently 2 ) // gfld->discipline = Message Discipline ( see Code Table 0.0 ) // gfld->idsect = Contains the entries in the Identification // Section ( Section 1 ) // This element is a pointer to an array // that holds the data. // gfld->idsect[0] = Identification of originating Centre // ( see Common Code Table C-1 ) // 7 - US National Weather Service // gfld->idsect[1] = Identification of originating Sub-centre // gfld->idsect[2] = GRIB Master Tables Version Number // ( see Code Table 1.0 ) // 0 - Experimental // 1 - Initial operational version number // gfld->idsect[3] = GRIB Local Tables Version Number // ( see Code Table 1.1 ) // 0 - Local tables not used // 1-254 - Number of local tables version used // gfld->idsect[4] = Significance of Reference Time (Code Table 1.2) // 0 - Analysis // 1 - Start of forecast // 2 - Verifying time of forecast // 3 - Observation time // gfld->idsect[5] = Year ( 4 digits ) // gfld->idsect[6] = Month // gfld->idsect[7) = Day // gfld->idsect[8] = Hour // gfld->idsect[9] = Minute // gfld->idsect[10] = Second // gfld->idsect[11] = Production status of processed data // ( see Code Table 1.3 ) // 0 - Operational products // 1 - Operational test products // 2 - Research products // 3 - Re-analysis products // gfld->idsect[12] = Type of processed data ( see Code Table 1.4 ) // 0 - Analysis products // 1 - Forecast products // 2 - Analysis and forecast products // 3 - Control forecast products // 4 - Perturbed forecast products // 5 - Control and perturbed forecast products // 6 - Processed satellite observations // 7 - Processed radar observations // gfld->idsectlen = Number of elements in gfld->idsect[]. // gfld->local = Pointer to character array containing contents // of Local Section 2, if included // gfld->locallen = length of array gfld->local[] // gfld->ifldnum = field number within GRIB message // gfld->griddef = Source of grid definition (see Code Table 3.0) // 0 - Specified in Code table 3.1 // 1 - Predetermined grid Defined by originating centre // gfld->ngrdpts = Number of grid points in the defined grid. // gfld->numoct_opt = Number of octets needed for each // additional grid points definition. // Used to define number of // points in each row ( or column ) for // non-regular grids. // = 0, if using regular grid. // gfld->interp_opt = Interpretation of list for optional points // definition. (Code Table 3.11) // gfld->igdtnum = Grid Definition Template Number (Code Table 3.1) // gfld->igdtmpl = Contains the data values for the specified Grid // Definition Template ( NN=gfld->igdtnum ). Each // element of this integer array contains an entry (in // the order specified) of Grid Defintion Template 3.NN // This element is a pointer to an array // that holds the data. // gfld->igdtlen = Number of elements in gfld->igdtmpl[]. i.e. number of // entries in Grid Defintion Template 3.NN // ( NN=gfld->igdtnum ). // gfld->list_opt = (Used if gfld->numoct_opt .ne. 0) This array // contains the number of grid points contained in // each row ( or column ). (part of Section 3) // This element is a pointer to an array // that holds the data. This pointer is nullified // if gfld->numoct_opt=0. // gfld->num_opt = (Used if gfld->numoct_opt .ne. 0) The number of entries // in array ideflist. i.e. number of rows ( or columns ) // for which optional grid points are defined. This value // is set to zero, if gfld->numoct_opt=0. // gfdl->ipdtnum = Product Definition Template Number (see Code Table 4.0) // gfld->ipdtmpl = Contains the data values for the specified Product // Definition Template ( N=gfdl->ipdtnum ). Each element // of this integer array contains an entry (in the // order specified) of Product Defintion Template 4.N. // This element is a pointer to an array // that holds the data. // gfld->ipdtlen = Number of elements in gfld->ipdtmpl[]. i.e. number of // entries in Product Defintion Template 4.N // ( N=gfdl->ipdtnum ). // gfld->coord_list = Real array containing floating point values // intended to document the vertical discretisation // associated to model data on hybrid coordinate // vertical levels. (part of Section 4) // This element is a pointer to an array // that holds the data. // gfld->num_coord = number of values in array gfld->coord_list[]. // gfld->ndpts = Number of data points unpacked and returned. // gfld->idrtnum = Data Representation Template Number // ( see Code Table 5.0) // gfld->idrtmpl = Contains the data values for the specified Data // Representation Template ( N=gfld->idrtnum ). Each // element of this integer array contains an entry // (in the order specified) of Product Defintion // Template 5.N. // This element is a pointer to an array // that holds the data. // gfld->idrtlen = Number of elements in gfld->idrtmpl[]. i.e. number // of entries in Data Representation Template 5.N // ( N=gfld->idrtnum ). // gfld->unpacked = logical value indicating whether the bitmap and // data values were unpacked. If false, // gfld->bmap and gfld->fld pointers are nullified. // gfld->expanded = Logical value indicating whether the data field // was expanded to the grid in the case where a // bit-map is present. If true, the data points in // gfld->fld match the grid points and zeros were // inserted at grid points where data was bit-mapped // out. If false, the data values in gfld->fld were // not expanded to the grid and are just a consecutive // array of data points corresponding to each value of // "1" in gfld->bmap. // gfld->ibmap = Bitmap indicator ( see Code Table 6.0 ) // 0 = bitmap applies and is included in Section 6. // 1-253 = Predefined bitmap applies // 254 = Previously defined bitmap applies to this field // 255 = Bit map does not apply to this product. // gfld->bmap = integer array containing decoded bitmap, // if gfld->ibmap=0 or gfld->ibap=254. Otherwise nullified. // This element is a pointer to an array // that holds the data. // gfld->fld = Array of gfld->ndpts unpacked data points. // This element is a pointer to an array // that holds the data. */ #ifdef __64BIT__ typedef int g2int; typedef unsigned int g2intu; #else typedef long g2int; typedef unsigned long g2intu; #endif typedef float g2float; struct template { g2int type; /* 3=Grid Defintion Template. */ /* 4=Product Defintion Template. */ /* 5=Data Representation Template. */ g2int num; /* template number. */ g2int maplen; /* number of entries in the static part */ /* of the template. */ g2int *map; /* num of octets of each entry in the */ /* static part of the template. */ g2int needext; /* indicates whether or not the template needs */ /* to be extended. */ g2int extlen; /* number of entries in the template extension. */ g2int *ext; /* num of octets of each entry in the extension */ /* part of the template. */ }; typedef struct template template; struct gribfield { g2int version,discipline; g2int *idsect; g2int idsectlen; unsigned char *local; g2int locallen; g2int ifldnum; g2int griddef,ngrdpts; g2int numoct_opt,interp_opt,num_opt; g2int *list_opt; g2int igdtnum,igdtlen; g2int *igdtmpl; g2int ipdtnum,ipdtlen; g2int *ipdtmpl; g2int num_coord; g2float *coord_list; g2int ndpts,idrtnum,idrtlen; g2int *idrtmpl; g2int unpacked; g2int expanded; g2int ibmap; g2int *bmap; g2float *fld; }; typedef struct gribfield gribfield; /* Prototypes for unpacking API */ void seekgb(FILE *,g2int ,g2int ,g2int *,g2int *); g2int g2_info(unsigned char *,g2int *,g2int *,g2int *,g2int *); g2int g2_getfld(unsigned char *,g2int ,g2int ,g2int ,gribfield **); void g2_free(gribfield *); /* Prototypes for packing API */ g2int g2_create(unsigned char *,g2int *,g2int *); g2int g2_addlocal(unsigned char *,unsigned char *,g2int ); g2int g2_addgrid(unsigned char *,g2int *,g2int *,g2int *,g2int ); g2int g2_addfield(unsigned char *,g2int ,g2int *, g2float *,g2int ,g2int ,g2int *, g2float *,g2int ,g2int ,g2int *); g2int g2_gribend(unsigned char *); /* Prototypes for supporting routines */ extern double int_power(double, g2int ); extern void mkieee(g2float *,g2int *,g2int); void rdieee(g2int *,g2float *,g2int ); extern template *getpdstemplate(g2int); extern template *extpdstemplate(g2int,g2int *); extern template *getdrstemplate(g2int); extern template *extdrstemplate(g2int,g2int *); extern template *getgridtemplate(g2int); extern template *extgridtemplate(g2int,g2int *); extern void simpack(g2float *,g2int,g2int *,unsigned char *,g2int *); extern void compack(g2float *,g2int,g2int,g2int *,unsigned char *,g2int *); void misspack(g2float *,g2int ,g2int ,g2int *, unsigned char *, g2int *); void gbit(unsigned char *,g2int *,g2int ,g2int ); void sbit(unsigned char *,g2int *,g2int ,g2int ); void gbits(unsigned char *,g2int *,g2int ,g2int ,g2int ,g2int ); void sbits(unsigned char *,g2int *,g2int ,g2int ,g2int ,g2int ); int pack_gp(g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *, g2int *); #endif /* _grib2_H */