/*****************************************************************************
* GDSValid() --
*
* Arthur Taylor / MDL
*
* PURPOSE
* Validates GDS for use with the current mapping library routines.
*
* ARGUMENTS
* gds = The filled in section 3 data to check. (Input)
*
* FILES/DATABASES: None
*
* RETURNS: int (could use errSprintf())
* 0 = Ok.
* -1 = Something was wrong with section 3.
*
* HISTORY
* 12/2002 Arthur Taylor (MDL/RSIS): Created.
* 5/2003 AAT: Enabled other spherical earths.
* 6/2003 AAT: Enabled Dx != Dy (by taking average).
* 1/2004 AAT: Emapf now supports elliptical earth.
*
* NOTES
*****************************************************************************
*/
int GDSValid (const gdsType *gds)
{
if (gds->numPts != gds->Ny * gds->Nx) {
errSprintf ("ERROR: numPts != Nx * Ny? (%ld != %ld * %ld)",
gds->numPts, gds->Nx, gds->Ny);
return -1;
}
/* Add GS3_LATLON ? */
if ((gds->projType != GS3_MERCATOR) && (gds->projType != GS3_POLAR) &&
(gds->projType != GS3_LAMBERT) && (gds->projType != GS3_LATLON)) {
errSprintf ("Projection code can not handle this projection yet. \n"
"See section 3 template type %d\n", gds->projType);
return -1;
}
/* Emapf now supports elipsoidal earth
if (!gds->f_sphere) {
errSprintf ("Projection code can not handle a non-sphere yet.");
return -1;
}
*/
if ((gds->Dx <= 0) || (gds->Dy <= 0)) {
errSprintf ("Projection code requires Dx (%f) > 0 and Dy (%f) > 0",
gds->Dx, gds->Dy);
return -1;
}
return 0;
}
/*****************************************************************************
* FindSectLen() -- Review 12/2002
*
* Arthur Taylor / MDL
*
* PURPOSE
* Looks through a GRIB message and finds out how big each section is.
*
* ARGUMENTS
* c_ipack = The current GRIB2 message. (Input)
* gribLen = Length of c_ipack. (Input)
* ns = Array of section lengths. (Output)
* nd2x3 = Total number of grid points (Output)
* table50 = Type of packing used. (See code table 5.0) (GS5_SIMPLE = 0,
* GS5_CMPLX = 2, GS5_CMPLXSEC = 3) (Output)
*
* FILES/DATABASES: None
*
* RETURNS: int (could use errSprintf())
* 0 = OK
* -1 = Ran of data in a section
* -2 = Section not properly labeled.
*
* HISTORY
* 9/2002 Arthur Taylor (MDL/RSIS): Created.
* 11/2002 AAT: Updated.
* 12/2002 (TK,AC,TB,&MS): Code Review.
* 3/2003 AAT: Made it handle multiple grids in the same GRIB2 message.
* 5/2003 AAT: Bug: Initialized size of section 2..6 to -1, instead
* of 2..7.
*
* NOTES
* 1) Assumes that the pack method of multiple grids are the same.
*****************************************************************************
*/
static int FindSectLen (char *c_ipack, sInt4 gribLen, sInt4 ns[8],
sInt4 *nd2x3, short int *table50)
{
sInt4 curTot; /* Where we are in the current GRIB message. */
char sectNum; /* Which section we are working with. */
int ans; /* The return error code of FindSectLen2to7. */
sInt4 sectLen; /* The length of the current section. */
int i; /* counter as we init ns[]. */
ns[0] = SECT0LEN_WORD * 4;
curTot = ns[0];
/* Figure out the size of section 1. */
if (curTot + 5 > gribLen) {
errSprintf ("ERROR: Ran out of data in Section 1\n");
return -1;
}
if (c_ipack[curTot + 4] != 1) {
errSprintf ("ERROR: Section 1 labeled as %d\n", c_ipack[curTot + 4]);
return -2;
}
MEMCPY_BIG (&(ns[1]), c_ipack + curTot, 4);
curTot += ns[1];
/*
#ifdef DEBUG
printf ("Section len (0=%ld) (1=%ld)\n", ns[0], ns[1]);
#endif
*/
sectNum = 2;
for (i = 2; i < 8; i++) {
ns[i] = -1;
}
*nd2x3 = -1;
do {
if ((ans = FindSectLen2to7 (c_ipack, gribLen, ns, sectNum, &curTot,
nd2x3, table50)) != 0) {
return ans;
}
/* Try to read section 8. If it is "7777" == 926365495 regardless of
* endian'ness then we have a simple message, otherwise it is complex,
* and we need to read more. */
memcpy (§Len, c_ipack + curTot, 4);
if (sectLen == 926365495L) {
sectNum = 8;
} else {
sectNum = c_ipack[curTot + 4];
if ((sectNum < 2) || (sectNum > 7)) {
errSprintf ("ERROR (FindSectLen): Couldn't find the end of the "
"message\n");
errSprintf ("and it doesn't appear to repeat sections.\n");
errSprintf ("so it is probably an ASCII / binary bug\n");
errSprintf ("Max Sect Lengths: %ld %ld %ld %ld %ld %ld %ld"
" %ld\n", ns[0], ns[1], ns[2], ns[3], ns[4], ns[5],
ns[6], ns[7]);
return -2;
}
}
} while (sectNum != 8);
return 0;
}
/* 1) find lwlf coresponding x1,y1, and uprt corresponding x2,y2
* 2) create a new gds based on old one, but shifted with lwlf in bottom
* left, and uprt in upper right.
* 3) Shift data around on grid? create new grid and copy data?
*/
int computeSubGrid (LatLon *lwlf, int *x1, int *y1, LatLon *uprt, int *x2,
int *y2, gdsType *gds, gdsType *newGds)
{
myMaparam map; /* Used to compute the grid lat/lon points. */
double x, y;
/* Check that gds is valid before setting up map projection. */
if (GDSValid (gds) != 0) {
preErrSprintf ("ERROR: gds was not Valid.\n");
return -1;
}
/* Validate that lwlf < uprt */
if (lwlf->lat > uprt->lat) {
x = lwlf->lat;
lwlf->lat = uprt->lat;
uprt->lat = x;
}
if (lwlf->lon > uprt->lon) {
x = lwlf->lon;
lwlf->lon = uprt->lon;
uprt->lon = x;
}
/* Set up the map projection. */
SetMapParamGDS (&map, gds);
myCll2xy (&map, lwlf->lat, lwlf->lon, &x, &y);
*x1 = (int) floor (x);
*y1 = (int) floor (y);
myCll2xy (&map, uprt->lat, uprt->lon, &x, &y);
*x2 = (int) ceil (x);
*y2 = (int) ceil (y);
if ((*x1 >= *x2) || (*y1 >= *y2)) {
errSprintf ("ERROR: subgrid is not at least one cell wide/high\n");
return -1;
}
myAssert ((gds->projType == GS3_LATLON) || (gds->projType == GS3_POLAR) ||
(gds->projType == GS3_LAMBERT) ||
(gds->projType == GS3_MERCATOR));
memcpy (newGds, gds, sizeof (gdsType));
newGds->Nx = *x2 - *x1 + 1;
newGds->Ny = *y2 - *y1 + 1;
newGds->numPts = (newGds->Nx * newGds->Ny);
myCxy2ll (&map, (double) (*x1), (double) (*y1), &(newGds->lat1),
&(newGds->lon1));
if (gds->projType == GS3_LATLON) {
myCxy2ll (&map, (double) (*x2), (double) (*y2), &(newGds->lat2),
&(newGds->lon2));
}
return 0;
}
/*****************************************************************************
* GRIB2SectToBuffer() -- Review 12/2002
*
* Arthur Taylor / MDL
*
* PURPOSE
* To read in a GRIB2 section into a buffer. Reallocates space for the
* section if buffLen < secLen. Reads in secLen and checks that the section
* is valid, and the file is large enough to hold the entire section.
*
* ARGUMENTS
* fp = Opened file pointing to the section in question. (Input/Output)
* gribLen = The total length of the grib message. (Input)
* sect = Which section we think we are reading.
* If it is -1, then set it to the section the file says we are
* reading (useful for optional sect 2)) (Input/Output).
* secLen = The length of this section (Output)
* buffLen = Allocated length of buff (Input/Output)
* buff = Stores the section (Output)
*
* FILES/DATABASES:
* An already opened GRIB2 file pointer, already at section in question.
*
* RETURNS: int (could use errSprintf())
* 0 = Ok.
* -1 = Ran out of file.
* -2 = Section was miss-labeled.
*
* HISTORY
* 11/2002 Arthur Taylor (MDL/RSIS): Created.
* 12/2002 (TK,AC,TB,&MS): Code Review.
* 8/2003 AAT: Removed dependence on curTot
*
* NOTES
* May want to put this in degrib2.c
*****************************************************************************
*/
static int GRIB2SectToBuffer (DataSource &fp,
CPL_UNUSED uInt4 gribLen,
sChar *sect,
uInt4 *secLen, uInt4 *buffLen, char **buff)
{
char *buffer = *buff; /* Local ptr to buff to reduce ptr confusion. */
if (FREAD_BIG (secLen, sizeof (sInt4), 1, fp) != 1) {
if (*sect != -1) {
errSprintf ("ERROR: Ran out of file in Section %d\n", *sect);
} else {
errSprintf ("ERROR: Ran out of file in GRIB2SectToBuffer\n");
}
return -1;
}
if( *secLen < sizeof(sInt4) )
{
errSprintf ("ERROR: Wrong secLen in GRIB2SectToBuffer\n");
return -1;
}
if (*buffLen < *secLen) {
char* buffnew = (char *) realloc ((void *) *buff, *secLen * sizeof (char));
if( buffnew == NULL )
{
errSprintf ("ERROR: Ran out of memory in GRIB2SectToBuffer\n");
return -1;
}
*buffLen = *secLen;
*buff = buffnew;
buffer = *buff;
}
if (fp.DataSourceFread (buffer, sizeof (char), *secLen - sizeof (sInt4)) !=
*secLen - sizeof (sInt4)) {
if (*sect != -1) {
errSprintf ("ERROR: Ran out of file in Section %d\n", *sect);
} else {
errSprintf ("ERROR: Ran out of file in GRIB2SectToBuffer\n");
}
return -1;
}
if (*sect == -1) {
*sect = buffer[5 - 5];
} else if (buffer[5 - 5] != *sect) {
errSprintf ("ERROR: Section %d mislabeled\n", *sect);
return -2;
}
return 0;
}
void GRIBRasterBand::ReadGribData( DataSource & fp, sInt4 start, int subgNum, double** data, grib_MetaData** metaData)
{
/* Initialisation, for calling the ReadGrib2Record function */
sInt4 f_endMsg = 1; /* 1 if we read the last grid in a GRIB message, or we haven't read any messages. */
// int subgNum = 0; /* The subgrid in the message that we are interested in. */
sChar f_unit = 2; /* None = 0, English = 1, Metric = 2 */
double majEarth = 0; /* -radEarth if < 6000 ignore, otherwise use this to
* override the radEarth in the GRIB1 or GRIB2
* message. Needed because NCEP uses 6371.2 but GRIB1 could only state 6367.47. */
double minEarth = 0; /* -minEarth if < 6000 ignore, otherwise use this to
* override the minEarth in the GRIB1 or GRIB2 message. */
sChar f_SimpleVer = 4; /* Which version of the simple NDFD Weather table to
* use. (1 is 6/2003) (2 is 1/2004) (3 is 2/2004)
* (4 is 11/2004) (default 4) */
LatLon lwlf; /* lower left corner (cookie slicing) -lwlf */
LatLon uprt; /* upper right corner (cookie slicing) -uprt */
IS_dataType is; /* Un-parsed meta data for this GRIB2 message. As well as some memory used by the unpacker. */
lwlf.lat = -100; // lat == -100 instructs the GRIB decoder that we don't want a subgrid
IS_Init (&is);
const char* pszGribNormalizeUnits = CPLGetConfigOption("GRIB_NORMALIZE_UNITS", NULL);
if ( pszGribNormalizeUnits != NULL && ( STRCASECMP(pszGribNormalizeUnits,"NO")==0 ) )
f_unit = 0; /* do not normalize units to metric */
/* Read GRIB message from file position "start". */
fp.DataSourceFseek(start, SEEK_SET);
uInt4 grib_DataLen = 0; /* Size of Grib_Data. */
*metaData = new grib_MetaData();
MetaInit (*metaData);
ReadGrib2Record (fp, f_unit, data, &grib_DataLen, *metaData, &is, subgNum,
majEarth, minEarth, f_SimpleVer, &f_endMsg, &lwlf, &uprt);
char * errMsg = errSprintf(NULL); // no intention to show errors, just swallow it and free the memory
if( errMsg != NULL )
CPLDebug( "GRIB", "%s", errMsg );
free(errMsg);
IS_Free(&is);
}
/*****************************************************************************
* GRIB2SectJump() --
*
* Arthur Taylor / MDL
*
* PURPOSE
* To jump past a GRIB2 section. Reads in secLen and checks that the
* section is valid.
*
* ARGUMENTS
* fp = Opened file pointing to the section in question. (Input/Output)
* gribLen = The total length of the grib message. (Input)
* sect = Which section we think we are reading.
* If it is -1, then set it to the section the file says we are
* reading (useful for optional sect 2)) (Input/Output).
* secLen = The length of this section (Output)
*
* FILES/DATABASES:
* An already opened GRIB2 file pointer, already at section in question.
*
* RETURNS: int (could use errSprintf())
* 0 = Ok.
* -1 = Ran out of file.
* -2 = Section was miss-labeled.
*
* HISTORY
* 3/2003 Arthur Taylor (MDL/RSIS): Created.
* 8/2003 AAT: Removed dependence on curTot, which was used to compute if
* the file should be large enough for the fseek, but didn't check
* if it actually was.
*
* NOTES
* May want to put this in degrib2.c
*****************************************************************************
*/
static int GRIB2SectJump (DataSource &fp,
CPL_UNUSED sInt4 gribLen, sChar *sect, uInt4 *secLen)
{
char sectNum; /* Validates that we are on the correct section. */
int c; /* Check that the fseek is still inside the file. */
if (FREAD_BIG (secLen, sizeof (sInt4), 1, fp) != 1) {
if (*sect != -1) {
errSprintf ("ERROR: Ran out of file in Section %d\n", *sect);
} else {
errSprintf ("ERROR: Ran out of file in GRIB2SectSkip\n");
}
return -1;
}
if (fp.DataSourceFread (§Num, sizeof (char), 1) != 1) {
if (*sect != -1) {
errSprintf ("ERROR: Ran out of file in Section %d\n", *sect);
} else {
errSprintf ("ERROR: Ran out of file in GRIB2SectSkip\n");
}
return -1;
}
if (*sect == -1) {
*sect = sectNum;
} else if (sectNum != *sect) {
errSprintf ("ERROR: Section %d mislabeled\n", *sect);
return -2;
}
/* Since fseek does not give an error if we jump outside the file, we test
* it by using fgetc / ungetc. */
fp.DataSourceFseek (*secLen - 5, SEEK_CUR);
if ((c = fp.DataSourceFgetc()) == EOF) {
errSprintf ("ERROR: Ran out of file in Section %d\n", *sect);
return -1;
} else {
fp.DataSourceUngetc(c);
}
return 0;
}
GDALDataset *GRIBDataset::Open( GDALOpenInfo * poOpenInfo )
{
if( !Identify(poOpenInfo) )
return NULL;
/* -------------------------------------------------------------------- */
/* A fast "probe" on the header that is partially read in memory. */
/* -------------------------------------------------------------------- */
char *buff = NULL;
uInt4 buffLen = 0;
sInt4 sect0[SECT0LEN_WORD];
uInt4 gribLen;
int version;
// grib is not thread safe, make sure not to cause problems
// for other thread safe formats
static void *mutex = 0;
CPLMutexHolderD(&mutex);
MemoryDataSource mds (poOpenInfo->pabyHeader, poOpenInfo->nHeaderBytes);
if (ReadSECT0 (mds, &buff, &buffLen, -1, sect0, &gribLen, &version) < 0) {
free (buff);
char * errMsg = errSprintf(NULL);
if( errMsg != NULL && strstr(errMsg,"Ran out of file") == NULL )
CPLDebug( "GRIB", "%s", errMsg );
free(errMsg);
return NULL;
}
free(buff);
/* -------------------------------------------------------------------- */
/* Confirm the requested access is supported. */
/* -------------------------------------------------------------------- */
if( poOpenInfo->eAccess == GA_Update )
{
CPLError( CE_Failure, CPLE_NotSupported,
"The GRIB driver does not support update access to existing"
" datasets.\n" );
return NULL;
}
/* -------------------------------------------------------------------- */
/* Create a corresponding GDALDataset. */
/* -------------------------------------------------------------------- */
GRIBDataset *poDS;
poDS = new GRIBDataset();
poDS->fp = VSIFOpenL( poOpenInfo->pszFilename, "r" );
/* Check the return values */
if (!poDS->fp) {
// we have no FP, so we don't have anywhere to read from
char * errMsg = errSprintf(NULL);
if( errMsg != NULL )
CPLDebug( "GRIB", "%s", errMsg );
free(errMsg);
CPLError( CE_Failure, CPLE_OpenFailed, "Error (%d) opening file %s", errno, poOpenInfo->pszFilename);
delete poDS;
return NULL;
}
/* -------------------------------------------------------------------- */
/* Read the header. */
/* -------------------------------------------------------------------- */
/* -------------------------------------------------------------------- */
/* Make an inventory of the GRIB file. */
/* The inventory does not contain all the information needed for */
/* creating the RasterBands (especially the x and y size), therefore */
/* the first GRIB band is also read for some additional metadata. */
/* The band-data that is read is stored into the first RasterBand, */
/* simply so that the same portion of the file is not read twice. */
/* -------------------------------------------------------------------- */
VSIFSeekL( poDS->fp, 0, SEEK_SET );
FileDataSource grib_fp (poDS->fp);
inventoryType *Inv = NULL; /* Contains an GRIB2 message inventory of the file */
uInt4 LenInv = 0; /* size of Inv (also # of GRIB2 messages) */
int msgNum =0; /* The messageNumber during the inventory. */
if (GRIB2Inventory (grib_fp, &Inv, &LenInv, 0, &msgNum) <= 0 )
{
char * errMsg = errSprintf(NULL);
if( errMsg != NULL )
CPLDebug( "GRIB", "%s", errMsg );
free(errMsg);
CPLError( CE_Failure, CPLE_OpenFailed,
"%s is a grib file, but no raster dataset was successfully identified.",
poOpenInfo->pszFilename );
delete poDS;
return NULL;
}
/* -------------------------------------------------------------------- */
/* Create band objects. */
/* -------------------------------------------------------------------- */
for (uInt4 i = 0; i < LenInv; ++i)
{
uInt4 bandNr = i+1;
if (bandNr == 1)
{
// important: set DataSet extents before creating first RasterBand in it
double * data = NULL;
grib_MetaData* metaData;
GRIBRasterBand::ReadGribData(grib_fp, 0, Inv[i].subgNum, &data, &metaData);
if (data == 0 || metaData->gds.Nx < 1 || metaData->gds.Ny < 1)
{
CPLError( CE_Failure, CPLE_OpenFailed,
"%s is a grib file, but no raster dataset was successfully identified.",
poOpenInfo->pszFilename );
delete poDS;
return NULL;
}
poDS->SetGribMetaData(metaData); // set the DataSet's x,y size, georeference and projection from the first GRIB band
GRIBRasterBand* gribBand = new GRIBRasterBand( poDS, bandNr, Inv+i);
if( Inv->GribVersion == 2 )
gribBand->FindPDSTemplate();
gribBand->m_Grib_Data = data;
gribBand->m_Grib_MetaData = metaData;
poDS->SetBand( bandNr, gribBand);
}
else
poDS->SetBand( bandNr, new GRIBRasterBand( poDS, bandNr, Inv+i ));
GRIB2InventoryFree (Inv + i);
}
free (Inv);
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription( poOpenInfo->pszFilename );
poDS->TryLoadXML();
/* -------------------------------------------------------------------- */
/* Check for external overviews. */
/* -------------------------------------------------------------------- */
poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename, poOpenInfo->papszSiblingFiles );
return( poDS );
}
/*****************************************************************************
* gribDraw() --
*
* Arthur Taylor / MDL
*
* PURPOSE
* This use GD to create an image based on the grid and a control file.
*
* ARGUMENTS
* Filename = Name of file to save to. (Input)
* grib_Data = The grib2 data to write. (Input)
* mapIniFile = Name of the mapIni file to control the draws. (Input)
* meta = Meta Data about the grid. (Input)
* usr = User specified options. (Input)
*
* RETURNS: int (could use errSprintf())
* 0 = OK
*
* HISTORY
* 10/2005 Arthur Taylor (MDL): Created.
*
* NOTES
*****************************************************************************
*/
int drawGrib (const char *Filename, double *grib_Data,
const char *mapIniFile, const char *mapIniOptions,
gdsType *gds, double Min, double Max, sChar f_missing,
double missing, grib_MetaData *meta, userType *usr)
{
mapIniType mapIni;
myMaparam map; /* Used to compute the grid lat/lon points. */
#ifdef TESTING
double lat, lon;
#endif
size_t nameLen = strlen (Filename);
double orientLon;
FILE *fp;
int i;
#ifdef DEBUG
printf ("start drawGrib. %f\n", clock () / (double) (CLOCKS_PER_SEC));
#endif
if (nameLen < 4) {
errSprintf ("ERROR: File %s is too short in length (it may need an "
"extension?)", Filename);
return -2;
}
/* Set up map projection. */
if (GDSValid (gds) != 0) {
preErrSprintf ("ERROR: Grid Definition Section was not Valid.\n");
return -1;
}
SetMapParamGDS (&map, gds);
InitMapIni (&mapIni);
if (mapIniFile != NULL) {
if ((fp = fopen (mapIniFile, "rt")) == NULL) {
errSprintf ("Couldn't open %s for read\n", mapIniFile);
FreeMapIni (&mapIni);
return -1;
}
if (ParseMapIniFile (&mapIni, mapIniOptions, fp) != 0) {
FreeMapIni (&mapIni);
return 0;
}
fclose (fp);
} else {
/* Set default background color. */
mapIni.all.bg.f_null = 1;
mapIni.all.bg.r = 255;
mapIni.all.bg.g = 255;
mapIni.all.bg.b = 255;
}
/* Set defaults for zoom. */
if (mapIni.zoom.f_flag == 0) {
if (map.f_latlon == 1) {
mapIni.zoom.lat1 = map.lat1;
mapIni.zoom.lon1 = map.lon1;
mapIni.zoom.lat2 = map.latN;
mapIni.zoom.lon2 = map.lonN;
} else {
myCxy2ll (&map, .5, .5, &(mapIni.zoom.lat1), &(mapIni.zoom.lon1));
myCxy2ll (&map, gds->Nx + .5, gds->Ny + .5, &(mapIni.zoom.lat2),
&(mapIni.zoom.lon2));
#ifdef TESTING
myCxy2ll (&map, .5, .5, &lat, &lon);
printf ("%f %f\n", lat, lon);
mapIni.zoom.lat1 = mapIni.zoom.lat2 = lat;
mapIni.zoom.lon1 = mapIni.zoom.lon2 = lon;
myCxy2ll (&map, .5, gds->Ny + .5, &lat, &lon);
printf ("%f %f\n", lat, lon);
if (lat < mapIni.zoom.lat1)
mapIni.zoom.lat1 = lat;
if (lat > mapIni.zoom.lat2)
mapIni.zoom.lat2 = lat;
if (lon < mapIni.zoom.lon1)
mapIni.zoom.lon1 = lon;
if (lon > mapIni.zoom.lon2)
mapIni.zoom.lon2 = lon;
myCxy2ll (&map, gds->Nx + .5, gds->Ny + .5, &lat, &lon);
printf ("%f %f\n", lat, lon);
if (lat < mapIni.zoom.lat1)
mapIni.zoom.lat1 = lat;
if (lat > mapIni.zoom.lat2)
mapIni.zoom.lat2 = lat;
if (lon < mapIni.zoom.lon1)
mapIni.zoom.lon1 = lon;
if (lon > mapIni.zoom.lon2)
mapIni.zoom.lon2 = lon;
myCxy2ll (&map, gds->Nx + .5, .5, &lat, &lon);
printf ("%f %f\n", lat, lon);
if (lat < mapIni.zoom.lat1)
mapIni.zoom.lat1 = lat;
if (lat > mapIni.zoom.lat2)
mapIni.zoom.lat2 = lat;
if (lon < mapIni.zoom.lon1)
mapIni.zoom.lon1 = lon;
if (lon > mapIni.zoom.lon2)
mapIni.zoom.lon2 = lon;
printf ("%f %f\n", lat, lon);
printf ("%f %f %f %f\n", mapIni.zoom.lat1, mapIni.zoom.lon1,
mapIni.zoom.lat2, mapIni.zoom.lon2);
#endif
}
mapIni.zoom.f_flag = 15;
}
/* Set defaults for projection section. */
if ((mapIni.proj.f_flag1 != 31) || (mapIni.proj.f_flag2 != 31)) {
mapIni.proj.type = gds->projType;
mapIni.proj.minEarth = gds->minEarth;
mapIni.proj.majEarth = gds->majEarth;
mapIni.proj.lat1 = gds->lat1;
mapIni.proj.lon1 = gds->lon1;
mapIni.proj.f_flag1 = 31;
mapIni.proj.mesh = gds->Dx;
orientLon = gds->orientLon;
if (orientLon > 180) {
orientLon -= 360;
}
if (orientLon < -180) {
orientLon += 360;
}
mapIni.proj.orientLon = orientLon;
mapIni.proj.meshLat = gds->meshLat;
mapIni.proj.scaleLat1 = gds->scaleLat1;
mapIni.proj.scaleLat2 = gds->scaleLat2;
mapIni.proj.f_flag2 = 31;
}
if (mapIni.all.numLayer == 0) {
mapIni.all.numLayer = 1;
mapIni.all.layers = (layerType *) malloc (mapIni.all.numLayer *
sizeof (layerType));
InitLayer (&(mapIni.all.layers[0]));
mapIni.all.layers[0].type = GRID;
mapIni.all.layers[0].shpType = MEMORY;
mapIni.all.layers[0].ramp.numColors = 0;
mapIni.all.layers[0].ramp.colors = NULL;
mapIni.all.layers[0].ramp.numLab = 0;
mapIni.all.layers[0].ramp.labRay = NULL;
mapIni.all.layers[0].ramp.labJust = NULL;
mapIni.all.layers[0].ramp.label = NULL;
mapIni.all.layers[0].ramp.f_missing = 0;
mapIni.all.layers[0].ramp.thick = 0;
}
for (i = 0; i < mapIni.all.numLayer; i++) {
if (mapIni.all.layers[i].shpType == MEMORY) {
mapIni.all.layers[i].gridData = grib_Data;
mapIni.all.layers[i].gridNx = gds->Nx;
mapIni.all.layers[i].gridNy = gds->Ny;
mapIni.all.layers[i].gridProj.type = gds->projType;
mapIni.all.layers[i].gridProj.minEarth = gds->minEarth;
mapIni.all.layers[i].gridProj.majEarth = gds->majEarth;
mapIni.all.layers[i].gridProj.lat1 = gds->lat1;
mapIni.all.layers[i].gridProj.lon1 = gds->lon1;
mapIni.all.layers[i].gridProj.f_flag1 = 31;
mapIni.all.layers[i].gridProj.mesh = gds->Dx;
orientLon = gds->orientLon;
if (orientLon > 180) {
orientLon -= 360;
}
if (orientLon < -180) {
orientLon += 360;
}
mapIni.all.layers[i].gridProj.orientLon = orientLon;
mapIni.all.layers[i].gridProj.meshLat = gds->meshLat;
mapIni.all.layers[i].gridProj.scaleLat1 = gds->scaleLat1;
mapIni.all.layers[i].gridProj.scaleLat2 = gds->scaleLat2;
mapIni.all.layers[i].gridProj.f_flag2 = 31;
if (mapIni.all.layers[i].ramp.numColors == 0) {
SetGridRamp (&(mapIni.all.layers[i]), Min, Max, f_missing,
missing);
} else {
if (f_missing) {
mapIni.all.layers[i].ramp.missValue = missing;
mapIni.all.layers[i].ramp.f_missing = f_missing;
}
}
}
}
/* Set defaults for output. */
if (mapIni.out.f_flag != 3) {
mapIni.out.X_Size = 520;
mapIni.out.Y_Size = 420;
mapIni.out.f_flag = 3;
}
if (mapIni.out.numOutputs == 0) {
mapIni.out.numOutputs = 1;
mapIni.out.outputs = (outputType *) malloc (mapIni.out.numOutputs *
sizeof (outputType));
mapIni.out.outputs[0].numActive = 1;
mapIni.out.outputs[0].active =
(int *) malloc (mapIni.out.outputs[0].numActive * sizeof (int));
mapIni.out.outputs[0].active[0] = 1;
mapIni.out.outputs[0].filename = NULL;
}
for (i = 0; i < mapIni.out.numOutputs; i++) {
if (mapIni.out.outputs[i].filename == NULL) {
mapIni.out.outputs[i].filename =
(char *) malloc (nameLen + 1 * sizeof (char));
strncpy (mapIni.out.outputs[i].filename, Filename, nameLen - 3);
strncpy (mapIni.out.outputs[i].filename + nameLen - 3, "png", 3);
mapIni.out.outputs[i].filename[nameLen] = '\0';
}
}
if (ValidateMapIni (&mapIni) != 0) {
printf ("MapINI was invalid \n");
FreeMapIni (&mapIni);
return 0;
}
#ifdef DEBUG
printf ("Before ControlDraw. %f\n", clock () / (double) (CLOCKS_PER_SEC));
#endif
ControlDraw (&mapIni);
#ifdef DEBUG
printf ("after ControlDraw. %f\n", clock () / (double) (CLOCKS_PER_SEC));
#endif
FreeMapIni (&mapIni);
return 0;
}
/***************************************************************************** * GRIB2Inventory() -- Review 12/2002 * * Arthur Taylor / MDL * * PURPOSE * Fills out an inventory structure for each GRIB message in a GRIB file, * without calling the FORTRAN routines to unpack the message. It returns * the number of messages it found, or a negative number signifying an error. * * ARGUMENTS * filename = File to do the inventory of. (Input) * Inv = The resultant array of inventories. (Output) * LenInv = Length of the Array Inv (Output) * numMsg = # of messages to inventory (0 = all, 1 = just first) (In) * msgNum = MsgNum to start with, MsgNum of last message (Input/Output) * * FILES/DATABASES: * Opens a GRIB2 file for reading given its filename. * * RETURNS: int (could use errSprintf()) * +# = number of GRIB2 messages in the file. * -1 = Problems opening file for read. * -2 = Problems in section 0 * -3 = Ran out of file. * -4 = Problems Reading in section 1 * -5 = Problems Reading in section 2 or 3 * -6 = Problems Reading in section 3 * -7 = Problems Reading in section 4 * -8 = Problems Parsing section 4. * -9 = Problems Reading in section 5 * -10 = Problems Reading in section 6 * -11 = Problems Reading in section 7 * -12 = Problems inventory'ing a GRIB1 record * -13 = Problems inventory'ing a TDLP record * * HISTORY * 9/2002 Arthur Taylor (MDL/RSIS): Created. * 11/2002 AAT: Revised. * 12/2002 (TK,AC,TB,&MS): Code Review. * 3/2003 AAT: Corrected some satellite type mistakes. * 3/2003 AAT: Implemented multiple grid inventories in the same GRIB2 * message. * 4/2003 AAT: Started adding GRIB1 support * 6/2003 Matthew T. Kallio ([email protected]): * "wmo" dimension increased to WMO_HEADER_LEN + 1 (for '\0' char) * 7/2003 AAT: Added numMsg so we can quickly find the reference time for * a file by inventorying just the first message. * 8/2003 AAT: Adjusted use of GRIB_LIMIT to only affect the first message * after we know we have a GRIB file, we don't want "trailing" bytes * to break the program. * 8/2003 AAT: switched fileLen to only be computed for an error message. * 8/2003 AAT: curTot no longer serves a purpose. * 5/2004 AAT: Added a check for section number 2..8 for the repeated * section (otherwise error) * 10/2004 AAT: Added ability to inventory TDLP records. * * NOTES ***************************************************************************** */ int GRIB2Inventory (DataSource &fp, inventoryType **Inv, uInt4 *LenInv, int numMsg, int *MsgNum) { //FileDataSource fp (filename); /* The opened GRIB2 file. */ sInt4 offset = 0; /* Where we are in the file. */ sInt4 msgNum; /* Which GRIB2 message we are on. */ uInt4 gribLen; /* Length of the current GRIB message. */ uInt4 secLen; /* Length of current section. */ sChar sectNum; /* Which section we are reading. */ char *buff; /* Holds the info between records. */ uInt4 buffLen; /* Length of info between records. */ sInt4 sect0[SECT0LEN_WORD]; /* Holds the current Section 0. */ char *buffer = NULL; /* Holds a given section. */ uInt4 bufferLen = 0; /* Size of buffer. */ inventoryType *inv; /* Local ptr to Inv to reduce ptr confusion. */ inventoryType *lastInv; /* Used to point to last inventory record when * there are multiple grids in the same message. */ wordType word; /* Used to parse the prodType out of Sect 0. */ int ans; /* The return error code of ReadSect0. */ char *msg; /* Used to pop messages off the error Stack. */ int version; /* Which version of GRIB is in this message. */ uChar prodType; /* Which GRIB2 type of product, 0 is meteo, 1 is * hydro, 2 is land, 3 is space, 10 is oceanographic. */ int grib_limit; /* How many bytes to look for before the first "GRIB" * in the file. If not found, is not a GRIB file. */ int c; /* Determine if end of the file without fileLen. */ sInt4 fileLen; /* Length of the GRIB2 file. */ unsigned short int center, subcenter; /* Who produced it. */ // char *ptr; /* used to find the file extension. */ grib_limit = GRIB_LIMIT; /* if (filename != NULL) { //if ((fp = fopen (filename, "rb")) == NULL) { // errSprintf ("ERROR: Problems opening %s for read.", filename); // return -1; //} //fp = FileDataSource(filename); ptr = strrchr (filename, '.'); if (ptr != NULL) { if (strcmp (ptr, ".tar") == 0) { grib_limit = 5000; } } } else { //fp = stdin; // TODO!! } */ msgNum = *MsgNum; buff = NULL; buffLen = 0; while ((c = fp.DataSourceFgetc()) != EOF) { fp.DataSourceUngetc(c); // ungetc (c, fp); /* msgNum++ done first so any error messages range from 1..n, instead * of 0.. n-1. Note msgNum should end up as n not (n-1) */ msgNum++; /* Used when testing inventory of large TDLPack files. */ /* #ifdef DEBUG myAssert (msgNum < 32500L); if (msgNum % 10 == 0) { printf ("%ld :: %f\n", msgNum, clock () / (double) CLOCKS_PER_SEC); } #endif */ /* Make it so the second, third, etc messages have no limit to finding * the "GRIB" keyword. */ if (msgNum > 1) { grib_limit = -1; } /* Read in the wmo header and sect0. */ if (ReadSECT0 (fp, &buff, &buffLen, grib_limit, sect0, &gribLen, &version) < 0) { if (msgNum == 1) { /* Handle case where we couldn't find 'GRIB' in the message. */ preErrSprintf ("Inside GRIB2Inventory, Message # %d\n", msgNum); free (buffer); free (buff); //fclose (fp); return -2; } else { /* Handle case where there are trailing bytes. */ msg = errSprintf (NULL); printf ("Warning: Inside GRIB2Inventory, Message # %d\n", msgNum); printf ("%s", msg); free (msg); /* find out how big the file is. */ fp.DataSourceFseek (0L, SEEK_END); fileLen = static_cast<int>(fp.DataSourceFtell()); /* fseek (fp, 0L, SEEK_SET); */ printf ("There were %d trailing bytes in the file.\n", fileLen - offset); free (buffer); free (buff); //fclose (fp); return msgNum; } } /* Make room for this GRIB message in the inventory list. */ *LenInv = *LenInv + 1; *Inv = (inventoryType *) realloc ((void *) *Inv, *LenInv * sizeof (inventoryType)); inv = *Inv + (*LenInv - 1); /* Start parsing the message. */ inv->GribVersion = version; inv->msgNum = msgNum; inv->subgNum = 0; inv->start = offset; inv->element = NULL; inv->comment = NULL; inv->unitName = NULL; inv->shortFstLevel = NULL; inv->longFstLevel = NULL; if (version == 1) { if (GRIB1_Inventory (fp, gribLen, inv) != 0) { preErrSprintf ("Inside GRIB2Inventory \n"); free (buffer); free (buff); //fclose (fp); return -12; } } else if (version == -1) { if (TDLP_Inventory (fp, gribLen, inv) != 0) { preErrSprintf ("Inside GRIB2Inventory \n"); free (buffer); free (buff); //fclose (fp); return -13; } } else { word.li = sect0[1]; prodType = word.buffer[2]; /* Read section 1 into buffer. */ sectNum = 1; if (GRIB2SectToBuffer (fp, gribLen, §Num, &secLen, &bufferLen, &buffer) != 0) { errSprintf ("ERROR: Problems with section 1\n"); free (buffer); free (buff); //fclose (fp); return -4; } /* Parse the interesting data out of sect 1. */ InventoryParseTime (buffer + 13 - 5, &(inv->refTime)); MEMCPY_BIG (¢er, buffer + 6 - 5, sizeof (short int)); MEMCPY_BIG (&subcenter, buffer + 8 - 5, sizeof (short int)); sectNum = 2; do { /* Look at sections 2 to 7 */ if ((ans = GRIB2Inventory2to7 (sectNum, fp, gribLen, &bufferLen, &buffer, inv, prodType, center, subcenter)) != 0) { //fclose (fp); free (buffer); free (buff); return ans; } /* Try to read section 8. If it is "7777" = 926365495 regardless * of endian'ness then we have a simple message, otherwise it is * complex, and we need to read more. */ if (FREAD_BIG (&secLen, sizeof (sInt4), 1, fp) != 1) { errSprintf ("ERROR: Ran out of file looking for Sect 8.\n"); free (buffer); free (buff); // fclose (fp); return -4; } if (secLen == 926365495L) { sectNum = 8; } else { if (fp.DataSourceFread (§Num, sizeof (char), 1) != 1) { errSprintf ("ERROR: Ran out of file looking for " "subMessage.\n"); free (buffer); free (buff); //fclose (fp); return -4; } if ((sectNum < 2) || (sectNum > 7)) { errSprintf ("ERROR (GRIB2Inventory): Couldn't find the end" " of message\n"); errSprintf ("and it doesn't appear to repeat sections.\n"); errSprintf ("so it is probably an ASCII / binary bug\n"); free (buffer); free (buff); //fclose (fp); return -4; } fp.DataSourceFseek (-5, SEEK_CUR); /* Make room for the next part of this GRIB message in the * inventory list. This is for when we have sub-grids. */ *LenInv = *LenInv + 1; *Inv = (inventoryType *) realloc ((void *) *Inv, *LenInv * sizeof (inventoryType)); inv = *Inv + (*LenInv - 1); lastInv = *Inv + (*LenInv - 2); inv->GribVersion = version; inv->msgNum = msgNum; inv->subgNum = lastInv->subgNum + 1; inv->start = offset; inv->element = NULL; inv->comment = NULL; inv->unitName = NULL; inv->shortFstLevel = NULL; inv->longFstLevel = NULL; word.li = sect0[1]; prodType = word.buffer[2]; inv->refTime = lastInv->refTime; } } while (sectNum != 8); } /* added to inventory either first msgNum messages, or all messages */ if (numMsg == msgNum) { break; } /* Continue on to the next GRIB2 message. */ if (version == -1) { /* TDLPack uses 4 bytes for FORTRAN record size, then another 8 * bytes for the size of the record (so FORTRAN can see it), then * the data rounded up to an 8 byte boundary, then a trailing 4 * bytes for a final FORTRAN record size. However it only stores * in_ the gribLen the non-rounded amount, so we need to take care * of the rounding, and the trailing 4 bytes here. */ offset += buffLen + ((sInt4) ceil (gribLen / 8.0)) * 8 + 4; } else { offset += buffLen + gribLen; } fp.DataSourceFseek (offset, SEEK_SET); } free (buffer); free (buff); //fclose (fp); *MsgNum = msgNum; return msgNum; }
/*****************************************************************************
* GRIB2Inventory2to7() --
*
* Arthur Taylor / MDL
*
* PURPOSE
* Inventories sections 3 to 7, filling out the inv record with the data in
* section 4. (Note: No Call to FORTRAN routines here).
*
* ARGUMENTS
* sectNum = Which section we are currently reading. (Input)
* fp = An opened file pointer to the file to the inventory of (In/Out)
* gribLen = The total length of the grib message. (Input)
* buffLen = length of buffer. (Input)
* buffer = Holds a given section. (Input)
* inv = The current inventory record to fill out. (Output)
* prodType = The GRIB2 type of product: 0 is meteo product, 1 is hydro,
* 2 is land, 3 is space, 10 is oceanographic. (Input)
* center = Who produced it (Input)
* subcenter = A sub group of center that actually produced it (Input)
*
* FILES/DATABASES:
*
* RETURNS: int (could use errSprintf())
* 0 = "Ok"
* -5 = Problems Reading in section 2 or 3
* -6 = Problems Reading in section 3
* -7 = Problems Reading in section 4
* -8 = Problems Parsing section 4.
* -9 = Problems Reading in section 5
* -10 = Problems Reading in section 6
* -11 = Problems Reading in section 7
*
* HISTORY
* 3/2003 Arthur Taylor (MDL/RSIS): Created.
* 4/2003 AAT: Modified to not have prodType, cat, subcat, templat in
* inventoryType structure.
* 8/2003 AAT: curTot no longer serves a purpose.
* 1/2004 AAT: Added center/subcenter.
*
* NOTES
*****************************************************************************
*/
static int GRIB2Inventory2to7 (sChar sectNum, DataSource &fp, sInt4 gribLen,
uInt4 *buffLen, char **buffer,
inventoryType *inv, uChar prodType,
unsigned short int center,
unsigned short int subcenter)
{
uInt4 secLen; /* The length of the current section. */
sInt4 foreTime; /* forecast time (NDFD treats as "projection") */
uChar foreTimeUnit; /* The time unit of the "forecast time". */
/* char *element; *//* Holds the name of the current variable. */
/* char *comment; *//* Holds more comments about current variable. */
/* char *unitName; *//* Holds the name of the unit [K] [%] .. etc */
int convert; /* Enum type of unit conversions (metaname.c),
* Conversion method for this variable's unit. */
uChar cat; /* General category of Meteo Product. */
unsigned short int templat; /* The section 4 template number. */
uChar subcat; /* Specific subcategory of Product. */
uChar fstSurfType; /* Type of the first fixed surface. */
double fstSurfValue; /* Value of first fixed surface. */
sInt4 value; /* The scaled value from GRIB2 file. */
sChar factor; /* The scaled factor from GRIB2 file */
sChar scale; /* Surface scale as opposed to probability factor. */
uChar sndSurfType; /* Type of the second fixed surface. */
double sndSurfValue; /* Value of second fixed surface. */
sChar f_sndValue; /* flag if SndValue is valid. */
uChar timeRangeUnit;
sInt4 lenTime; /* Used by parseTime to tell difference between 8hr
* average and 1hr average ozone. */
uChar genID; /* The Generating process ID (used for GFS MOS) */
uChar probType; /* The probability type */
double lowerProb; /* The lower limit on probability forecast if
* template 4.5 or 4.9 */
double upperProb; /* The upper limit on probability forecast if
* template 4.5 or 4.9 */
uChar timeIncrType;
sChar percentile = 0;
if ((sectNum == 2) || (sectNum == 3)) {
/* Jump past section (2 or 3). */
sectNum = -1;
if (GRIB2SectJump (fp, gribLen, §Num, &secLen) != 0) {
errSprintf ("ERROR: Problems Jumping past section 2 || 3\n");
return -6;
}
if ((sectNum != 2) && (sectNum != 3)) {
errSprintf ("ERROR: Section 2 or 3 mislabeled\n");
return -5;
} else if (sectNum == 2) {
/* Jump past section 3. */
sectNum = 3;
if (GRIB2SectJump (fp, gribLen, §Num, &secLen) != 0) {
errSprintf ("ERROR: Problems Jumping past section 3\n");
return -6;
}
}
}
/* Read section 4 into buffer. */
sectNum = 4;
if (GRIB2SectToBuffer (fp, gribLen, §Num, &secLen, buffLen,
buffer) != 0) {
errSprintf ("ERROR: Problems with section 4\n");
return -7;
}
/*
enum { GS4_ANALYSIS, GS4_ENSEMBLE, GS4_DERIVED, GS4_PROBABIL_PNT = 5,
GS4_STATISTIC = 8, GS4_PROBABIL_TIME = 9, GS4_PERCENTILE = 10,
GS4_RADAR = 20, GS4_SATELLITE = 30
};
*/
/* Parse the interesting data out of sect 4. */
MEMCPY_BIG (&templat, *buffer + 8 - 5, sizeof (short int));
if ((templat != GS4_ANALYSIS) && (templat != GS4_ENSEMBLE)
&& (templat != GS4_DERIVED)
&& (templat != GS4_PROBABIL_PNT) && (templat != GS4_STATISTIC)
&& (templat != GS4_PROBABIL_TIME) && (templat != GS4_PERCENTILE)
&& (templat != GS4_ENSEMBLE_STAT)
&& (templat != GS4_RADAR) && (templat != GS4_SATELLITE)
&& (templat != GS4_DERIVED_INTERVAL)) {
errSprintf ("This was only designed for templates 0, 1, 2, 5, 8, 9, "
"10, 11, 12, 20, 30\n");
return -8;
}
cat = (*buffer)[10 - 5];
subcat = (*buffer)[11 - 5];
genID = 0;
probType = 0;
lowerProb = 0;
upperProb = 0;
if ((templat == GS4_RADAR) || (templat == GS4_SATELLITE) ||
(templat == 254)) {
inv->foreSec = 0;
inv->validTime = inv->refTime;
timeIncrType = 255;
timeRangeUnit = 255;
lenTime = 0;
} else {
genID = (*buffer)[14 - 5];
/* Compute forecast time. */
foreTimeUnit = (*buffer)[18 - 5];
MEMCPY_BIG (&foreTime, *buffer + 19 - 5, sizeof (sInt4));
if (ParseSect4Time2sec (foreTime, foreTimeUnit, &(inv->foreSec)) != 0) {
errSprintf ("unable to convert TimeUnit: %d \n", foreTimeUnit);
return -8;
}
/* Compute valid time. */
inv->validTime = inv->refTime + inv->foreSec;
timeIncrType = 255;
timeRangeUnit = 1;
lenTime = (sInt4) (inv->foreSec / 3600);
switch (templat) {
case GS4_PROBABIL_PNT: /* 4.5 */
probType = (*buffer)[37 - 5];
factor = (sChar) (*buffer)[38 - 5];
MEMCPY_BIG (&value, *buffer + 39 - 5, sizeof (sInt4));
lowerProb = value * pow (10.0, -1 * factor);
factor = (sChar) (*buffer)[43 - 5];
MEMCPY_BIG (&value, *buffer + 44 - 5, sizeof (sInt4));
upperProb = value * pow (10.0, -1 * factor);
break;
case GS4_DERIVED_INTERVAL: /* 4.12 */
if (InventoryParseTime (*buffer + 37 - 5, &(inv->validTime)) != 0) {
printf ("Warning: Investigate Template 4.12 bytes 37-43\n");
inv->validTime = inv->refTime + inv->foreSec;
}
timeIncrType = (*buffer)[50 - 5];
timeRangeUnit = (*buffer)[51 - 5];
MEMCPY_BIG (&lenTime, *buffer + 52 - 5, sizeof (sInt4));
/* If lenTime == missing (2^32 -1) we might do something, but not with 255.*/
/*
if (lenTime == 255) {
lenTime = (inv->validTime -
(inv->refTime + inv->foreSec)) / 3600;
}
*/
break;
case GS4_PERCENTILE: /* 4.10 */
percentile = (*buffer)[35 - 5];
if (InventoryParseTime (*buffer + 36 - 5, &(inv->validTime)) != 0) {
printf ("Warning: Investigate Template 4.10 bytes 36-42\n");
inv->validTime = inv->refTime + inv->foreSec;
}
timeIncrType = (*buffer)[49 - 5];
timeRangeUnit = (*buffer)[50 - 5];
MEMCPY_BIG (&lenTime, *buffer + 51 - 5, sizeof (sInt4));
/* If lenTime == missing (2^32 -1) we might do something, but not with 255.*/
/*
if (lenTime == 255) {
lenTime = (inv->validTime -
(inv->refTime + inv->foreSec)) / 3600;
}
*/
break;
case GS4_STATISTIC: /* 4.8 */
if (InventoryParseTime (*buffer + 35 - 5, &(inv->validTime)) != 0) {
printf ("Warning: Investigate Template 4.8 bytes 35-41\n");
inv->validTime = inv->refTime + inv->foreSec;
}
timeIncrType = (*buffer)[48 - 5];
timeRangeUnit = (*buffer)[49 - 5];
MEMCPY_BIG (&lenTime, *buffer + 50 - 5, sizeof (sInt4));
/* If lenTime == missing (2^32 -1) we might do something, but not with 255.*/
/*
if (lenTime == 255) {
lenTime = (inv->validTime -
(inv->refTime + inv->foreSec)) / 3600;
}
*/
break;
case GS4_ENSEMBLE_STAT: /* 4.11 */
if (InventoryParseTime (*buffer + 38 - 5, &(inv->validTime)) != 0) {
printf ("Warning: Investigate Template 4.11 bytes 38-44\n");
inv->validTime = inv->refTime + inv->foreSec;
}
timeIncrType = (*buffer)[51 - 5];
timeRangeUnit = (*buffer)[52 - 5];
MEMCPY_BIG (&lenTime, *buffer + 53 - 5, sizeof (sInt4));
/* If lenTime == missing (2^32 -1) we might do something, but not with 255.*/
/*
if (lenTime == 255) {
lenTime = (inv->validTime -
(inv->refTime + inv->foreSec)) / 3600;
}
*/
break;
case GS4_PROBABIL_TIME: /* 4.9 */
probType = (*buffer)[37 - 5];
if ((uChar) (*buffer)[38 - 5] > 128) {
factor = 128 - (uChar) (*buffer)[38 - 5];
} else {
factor = (*buffer)[38 - 5];
}
MEMCPY_BIG (&value, *buffer + 39 - 5, sizeof (sInt4));
lowerProb = value * pow (10.0, -1 * factor);
if ((uChar) (*buffer)[43 - 5] > 128) {
factor = 128 - (uChar) (*buffer)[43 - 5];
} else {
factor = (*buffer)[43 - 5];
}
MEMCPY_BIG (&value, *buffer + 44 - 5, sizeof (sInt4));
upperProb = value * pow (10.0, -1 * factor);
if (InventoryParseTime (*buffer + 48 - 5, &(inv->validTime)) != 0) {
printf ("Warning: Investigate Template 4.9 bytes 48-54\n");
inv->validTime = inv->refTime + inv->foreSec;
}
timeIncrType = (*buffer)[61 - 5];
timeRangeUnit = (*buffer)[62 - 5];
MEMCPY_BIG (&lenTime, *buffer + 63 - 5, sizeof (sInt4));
/* If lenTime == missing (2^32 -1) we might do something, but not with 255.*/
/*
if (lenTime == 255) {
lenTime = (inv->validTime -
(inv->refTime + inv->foreSec)) / 3600;
}
*/
break;
}
}
if (timeRangeUnit == 255) {
timeRangeUnit = 1;
lenTime = (sInt4) ((inv->validTime - inv->foreSec - inv->refTime) /
3600);
}
/* myAssert (timeRangeUnit == 1);*/
/* Try to convert lenTime to hourly. */
if (timeRangeUnit == 0) {
lenTime = (sInt4) (lenTime / 60.);
/*timeRangeUnit = 1;*/
} else if (timeRangeUnit == 1) {
} else if (timeRangeUnit == 2) {
lenTime = lenTime * 24;
/*timeRangeUnit = 1;*/
} else if (timeRangeUnit == 10) {
lenTime = lenTime * 3;
/*timeRangeUnit = 1;*/
} else if (timeRangeUnit == 11) {
lenTime = lenTime * 6;
/*timeRangeUnit = 1;*/
} else if (timeRangeUnit == 12) {
lenTime = lenTime * 12;
/*timeRangeUnit = 1;*/
} else if (timeRangeUnit == 13) {
lenTime = (sInt4) (lenTime / 3600.);
/*timeRangeUnit = 1;*/
} else {
printf ("Can't handle this timeRangeUnit\n");
//myAssert (timeRangeUnit == 1);
return -8;
}
if (lenTime == GRIB2MISSING_s4) {
lenTime = 0;
}
/* Find out what the name of this variable is. */
ParseElemName (center, subcenter, prodType, templat, cat, subcat,
lenTime, timeIncrType, genID, probType, lowerProb,
upperProb, &(inv->element), &(inv->comment),
&(inv->unitName), &convert, percentile);
/*
if (strcmp (element, "") == 0) {
mallocSprintf (&(inv->element), "unknown");
mallocSprintf (&(inv->unitName), "[%s]", unitName);
if (strcmp (comment, "unknown") == 0) {
mallocSprintf (&(inv->comment), "(prodType %d, cat %d, subcat %d)"
" [%s]", prodType, cat, subcat, unitName);
} else {
mallocSprintf (&(inv->comment), "%s [%s]", comment, unitName);
}
} else {
if (IsData_MOS (center, subcenter)) {
* See : http://www.nco.ncep.noaa.gov/pmb/docs/on388/tablea.html *
if (genID == 96) {
inv->element = (char *) malloc ((1 + 7 + strlen (element))
* sizeof (char));
sprintf (inv->element, "MOSGFS-%s", element);
} else {
inv->element = (char *) malloc ((1 + 4 + strlen (element))
* sizeof (char));
sprintf (inv->element, "MOS-%s", element);
}
} else {
inv->element = (char *) malloc ((1 + strlen (element))
* sizeof (char));
strcpy (inv->element, element);
}
mallocSprintf (&(inv->unitName), "[%s]", unitName);
mallocSprintf (&(inv->comment), "%s [%s]", comment, unitName);
*
inv->unitName = (char *) malloc ((1 + 2 + strlen (unitName))
* sizeof (char));
sprintf (inv->unitName, "[%s]", unitName);
inv->comment = (char *) malloc ((1 + 3 + strlen (unitName) + strlen (comment))
* sizeof (char));
sprintf (inv->comment, "%s [%s]", comment, unitName);
*
}
*/
if ((templat == GS4_RADAR) || (templat == GS4_SATELLITE)
|| (templat == 254) || (templat == 1000) || (templat == 1001)
|| (templat == 1002)) {
reallocSprintf (&(inv->shortFstLevel), "0 undefined");
reallocSprintf (&(inv->longFstLevel), "0.000[-] undefined ()");
} else {
fstSurfType = (*buffer)[23 - 5];
scale = (*buffer)[24 - 5];
MEMCPY_BIG (&value, *buffer + 25 - 5, sizeof (sInt4));
if ((value == GRIB2MISSING_s4) || (scale == GRIB2MISSING_s1)) {
fstSurfValue = 0;
} else {
fstSurfValue = value * pow (10.0, (int) (-1 * scale));
}
sndSurfType = (*buffer)[29 - 5];
scale = (*buffer)[30 - 5];
MEMCPY_BIG (&value, *buffer + 31 - 5, sizeof (sInt4));
if ((value == GRIB2MISSING_s4) || (scale == GRIB2MISSING_s1) ||
(sndSurfType == GRIB2MISSING_u1)) {
sndSurfValue = 0;
f_sndValue = 0;
} else {
sndSurfValue = value * pow (10.0, -1 * scale);
f_sndValue = 1;
}
ParseLevelName (center, subcenter, fstSurfType, fstSurfValue,
f_sndValue, sndSurfValue, &(inv->shortFstLevel),
&(inv->longFstLevel));
}
/* Jump past section 5. */
sectNum = 5;
if (GRIB2SectJump (fp, gribLen, §Num, &secLen) != 0) {
errSprintf ("ERROR: Problems Jumping past section 5\n");
return -9;
}
/* Jump past section 6. */
sectNum = 6;
if (GRIB2SectJump (fp, gribLen, §Num, &secLen) != 0) {
errSprintf ("ERROR: Problems Jumping past section 6\n");
return -10;
}
/* Jump past section 7. */
sectNum = 7;
if (GRIB2SectJump (fp, gribLen, §Num, &secLen) != 0) {
errSprintf ("ERROR: Problems Jumping past section 7\n");
return -11;
}
return 0;
}
int GRIB2RefTime (char *filename, double *refTime)
{
FileDataSource fp (filename); /* The opened GRIB2 file. */
sInt4 offset = 0; /* Where we are in the file. */
sInt4 msgNum; /* Which GRIB2 message we are on. */
uInt4 gribLen; /* Length of the current GRIB message. */
uInt4 secLen; /* Length of current section. */
sChar sectNum; /* Which section we are reading. */
char *buff; /* Holds the info between records. */
uInt4 buffLen; /* Length of info between records. */
sInt4 sect0[SECT0LEN_WORD]; /* Holds the current Section 0. */
char *buffer = NULL; /* Holds a given section. */
uInt4 bufferLen = 0; /* Size of buffer. */
/* wordType word; */ /* Used to parse the prodType out of Sect 0. */
int ans; /* The return error code of ReadSect0. */
char *msg; /* Used to pop messages off the error Stack. */
int version; /* Which version of GRIB is in this message. */
/* uChar prodType; */ /* Which GRIB2 type of product, 0 is meteo, 1 is
* hydro, 2 is land, 3 is space, 10 is oceanographic.
*/
int grib_limit; /* How many bytes to look for before the first "GRIB"
* in the file. If not found, is not a GRIB file. */
int c; /* Determine if end of the file without fileLen. */
sInt4 fileLen; /* Length of the GRIB2 file. */
char *ptr; /* used to find the file extension. */
double refTime1;
grib_limit = GRIB_LIMIT;
if (filename != NULL) {
//if ((fp = fopen (filename, "rb")) == NULL) {
// errSprintf ("ERROR: Problems opening %s for read.", filename);
// return -1;
//}
//fp = DataSource(filename);
ptr = strrchr (filename, '.');
if (ptr != NULL) {
if (strcmp (ptr, ".tar") == 0) {
grib_limit = 5000;
}
}
} else {
// fp = stdin; // TODO!!
}
msgNum = 0;
buff = NULL;
buffLen = 0;
while ((c = fp.DataSourceFgetc()) != EOF) {
fp.DataSourceUngetc(c);
/* msgNum++ done first so any error messages range from 1..n, instead
* of 0.. n-1. Note msgNum should end up as n not (n-1) */
msgNum++;
/* Make it so the second, third, etc messages have no limit to finding
* the "GRIB" keyword. */
if (msgNum > 1) {
grib_limit = -1;
}
/* Read in the wmo header and sect0. */
if ((ans = ReadSECT0 (fp, &buff, &buffLen, grib_limit, sect0, &gribLen,
&version)) < 0) {
if (msgNum == 1) {
/* Handle case where we couldn't find 'GRIB' in the message. */
preErrSprintf ("Inside GRIB2RefTime, Message # %d\n", msgNum);
free (buffer);
free (buff);
//fclose (fp);
return -2;
} else {
/* Handle case where there are trailing bytes. */
msg = errSprintf (NULL);
printf ("Warning: Inside GRIB2RefTime, Message # %d\n", msgNum);
printf ("%s", msg);
free (msg);
/* find out how big the file is. */
fp.DataSourceFseek (0L, SEEK_END);
fileLen = static_cast<int>(fp.DataSourceFtell());
/* fseek (fp, 0L, SEEK_SET); */
printf ("There were %d trailing bytes in the file.\n",
fileLen - offset);
free (buffer);
free (buff);
//fclose (fp);
return msgNum;
}
}
if (version == 1) {
if (GRIB1_RefTime (fp, gribLen, &(refTime1)) != 0) {
preErrSprintf ("Inside GRIB1_RefTime\n");
free (buffer);
free (buff);
//fclose (fp);
return -12;
}
} else if (version == -1) {
if (TDLP_RefTime (fp, gribLen, &(refTime1)) != 0) {
preErrSprintf ("Inside TDLP_RefTime\n");
free (buffer);
free (buff);
//fclose (fp);
return -13;
}
} else {
/* word.li = sect0[1]; */
/* prodType = word.buffer[2]; */
/* Read section 1 into buffer. */
sectNum = 1;
if (GRIB2SectToBuffer (fp, gribLen, §Num, &secLen, &bufferLen,
&buffer) != 0) {
errSprintf ("ERROR: Problems with section 1\n");
free (buffer);
//fclose (fp);
return -4;
}
/* Parse the interesting data out of sect 1. */
InventoryParseTime (buffer + 13 - 5, &(refTime1));
}
if (msgNum == 1) {
*refTime = refTime1;
} else {
if (*refTime > refTime1) {
*refTime = refTime1;
}
}
/* Continue on to the next GRIB2 message. */
offset += gribLen + buffLen;
fp.DataSourceFseek (offset, SEEK_SET);
}
free (buffer);
free (buff);
//fclose (fp);
return 0;
}
int ReadGrib2Record (DataSource &fp, sChar f_unit, double **Grib_Data,
uInt4 *grib_DataLen, grib_MetaData *meta,
IS_dataType *IS, int subgNum, double majEarth,
double minEarth, int simpVer, sInt4 *f_endMsg,
CPL_UNUSED LatLon *lwlf, CPL_UNUSED LatLon *uprt)
{
sInt4 l3264b; /* Number of bits in a sInt4. Needed by FORTRAN
* unpack library to determine if system has a 4
* byte_ sInt4 or an 8 byte sInt4. */
char *buff; /* Holds the info between records. */
uInt4 buffLen; /* Length of info between records. */
sInt4 sect0[SECT0LEN_WORD]; /* Holds the current Section 0. */
uInt4 gribLen; /* Length of the current GRIB message. */
sInt4 nd5; /* Size of grib message rounded up to the nearest
* sInt4. */
char *c_ipack; /* A char ptr to the message stored in IS->ipack */
sInt4 local_ns[8]; /* Local copy of section lengths. */
sInt4 nd2x3; /* Total number of grid points. */
short int table50; /* Type of packing used. (See code table 5.0)
* (GS5_SIMPLE==0, GS5_CMPLX==2, GS5_CMPLXSEC==3) */
sInt4 nidat; /* Size of section 2 if it contains integer data. */
sInt4 nrdat; /* Size of section 2 if it contains float data. */
sInt4 inew; /* 1 if this is the first grid we are reading. 0 if
* this is the second or later grid from the same
* GRIB message. */
sInt4 iclean = 0; /* 0 embed the missing values, 1 don't. */
int j; /* Counter used to find the desired subgrid. */
sInt4 kfildo = 5; /* FORTRAN Unit number for diagnostic info. Ignored,
* unless library is compiled a particular way. */
sInt4 ibitmap; /* 0 means no bitmap returned, otherwise 1. */
float xmissp; /* The primary missing value. If iclean = 0, this
* value is embeded in grid, otherwise it is the
* value returned from the GRIB message. */
float xmisss; /* The secondary missing value. If iclean = 0, this
* value is embeded in grid, otherwise it is the
* value returned from the GRIB message. */
sInt4 jer[UNPK_NUM_ERRORS * 2]; /* Any Error codes along with their *
* severity levels generated using the *
* unpack GRIB2 library. */
sInt4 ndjer = UNPK_NUM_ERRORS; /* The number of rows in JER( ). */
sInt4 kjer; /* The actual number of errors returned in JER. */
size_t i; /* counter as we loop through jer. */
double unitM, unitB; /* values in y = m x + b used for unit conversion. */
char unitName[15]; /* Holds the string name of the current unit. */
int unitLen; /* String length of string name of current unit. */
int version; /* Which version of GRIB is in this message. */
sInt4 cnt; /* Used to help compact the weather table. */
int x1, y1; /* The original grid coordinates of the lower left
* corner of the subgrid. */
int x2, y2; /* The original grid coordinates of the upper right
* corner of the subgrid. */
uChar f_subGrid; /* True if we have a subgrid. */
sInt4 Nx, Ny; /* original size of the data. */
/*
* f_endMsg is 1 if in the past we either completed reading a message,
* or we haven't read any messages. In either case we need to read the
* next message from file.
* If f_endMsg is false, then there is more to read from IS->ipack, so we
* don't want to throw it out, nor have to re-read ipack from disk.
*/
l3264b = sizeof (sInt4) * 8;
buff = NULL;
buffLen = 0;
if (*f_endMsg == 1) {
if (ReadSECT0 (fp, &buff, &buffLen, -1, sect0, &gribLen, &version) < 0) {
preErrSprintf ("Inside ReadGrib2Record\n");
free (buff);
return -1;
}
meta->GribVersion = version;
if (version == 1) {
if (ReadGrib1Record (fp, f_unit, Grib_Data, grib_DataLen, meta, IS,
sect0, gribLen, majEarth, minEarth) != 0) {
preErrSprintf ("Problems with ReadGrib1Record called by "
"ReadGrib2Record\n");
free (buff);
return -1;
}
*f_endMsg = 1;
free (buff);
return 0;
} else if (version == -1) {
if (ReadTDLPRecord (fp, Grib_Data, grib_DataLen, meta, IS,
sect0, gribLen, majEarth, minEarth) != 0) {
preErrSprintf ("Problems with ReadGrib1Record called by "
"ReadGrib2Record\n");
free (buff);
return -1;
}
free (buff);
return 0;
}
/*
* Make room for entire message, and read it in.
*/
/* nd5 needs to be gribLen in (sInt4) units rounded up. */
nd5 = (gribLen + 3) / 4;
if (nd5 > IS->ipackLen) {
IS->ipackLen = nd5;
IS->ipack = (sInt4 *) realloc ((void *) (IS->ipack),
(IS->ipackLen) * sizeof (sInt4));
}
c_ipack = (char *) IS->ipack;
/* Init last sInt4 to 0, to make sure that the padded bytes are 0. */
IS->ipack[nd5 - 1] = 0;
/* Init first 4 sInt4 to sect0. */
memcpy (c_ipack, sect0, SECT0LEN_WORD * 4);
/* Read in the rest of the message. */
if (fp.DataSourceFread (c_ipack + SECT0LEN_WORD * 4, sizeof (char),
(gribLen - SECT0LEN_WORD * 4)) != (gribLen - SECT0LEN_WORD * 4)) {
errSprintf ("GribLen = %ld, SECT0Len_WORD = %d\n", gribLen,
SECT0LEN_WORD);
errSprintf ("Ran out of file\n");
free (buff);
return -1;
}
/*
* Make sure the arrays are large enough for call to unpacker library.
*/
/* FindSectLen Does not want (ipack / c_ipack) word swapped, because
* that would make it much more confusing to find bytes in c_ipack. */
if (FindSectLen (c_ipack, gribLen, local_ns, &nd2x3, &table50) < 0) {
preErrSprintf ("Inside ReadGrib2Record.. Calling FindSectLen\n");
free (buff);
return -2;
}
/* Make sure all 'is' arrays except ns[7] are MAX (IS.ns[] ,
* local_ns[]). See note 1 for reason to exclude ns[7] from MAX (). */
for (i = 0; i < 7; i++) {
if (local_ns[i] > IS->ns[i]) {
IS->ns[i] = local_ns[i];
IS->is[i] = (sInt4 *) realloc ((void *) (IS->is[i]),
IS->ns[i] * sizeof (sInt4));
}
}
/* Allocate room for sect 2. If local_ns[2] = -1 there is no sect 2. */
if (local_ns[2] == -1) {
nidat = 10;
nrdat = 10;
} else {
/*
* See note 2) We have a section 2, so use:
* MAX (32 * local_ns[2],SECT2_INTSIZE)
* and MAX (32 * local_ns[2],SECT2_FLOATSIZE)
* for size of section 2 unpacked.
*/
nidat = (32 * local_ns[2] < SECT2_INIT_SIZE) ? SECT2_INIT_SIZE :
32 * local_ns[2];
nrdat = nidat;
}
if (nidat > IS->nidat) {
IS->nidat = nidat;
IS->idat = (sInt4 *) realloc ((void *) IS->idat,
IS->nidat * sizeof (sInt4));
}
if (nrdat > IS->nrdat) {
IS->nrdat = nrdat;
IS->rdat = (float *) realloc ((void *) IS->rdat,
IS->nrdat * sizeof (float));
}
/* Make sure we have room for the GRID part of the output. */
if (nd2x3 > IS->nd2x3) {
IS->nd2x3 = nd2x3;
IS->iain = (sInt4 *) realloc ((void *) IS->iain,
IS->nd2x3 * sizeof (sInt4));
IS->ib = (sInt4 *) realloc ((void *) IS->ib,
IS->nd2x3 * sizeof (sInt4));
}
/* See note 3) If table50 == 3, unpacker library needs nd5 >= nd2x3. */
if ((table50 == 3) || (table50 == 0)) {
if (nd5 < nd2x3) {
nd5 = nd2x3;
if (nd5 > IS->ipackLen) {
IS->ipackLen = nd5;
IS->ipack = (sInt4 *) realloc ((void *) (IS->ipack),
IS->ipackLen * sizeof (sInt4));
}
/* Don't need to do the following, but we do in case code
* changes. */
c_ipack = (char *) IS->ipack;
}
}
IS->nd5 = nd5;
/* Unpacker library requires ipack to be MSB. */
/*
#ifdef DEBUG
if (1==1) {
FILE *fp = fopen ("test.bin", "wb");
fwrite (IS->ipack, sizeof (sInt4), IS->nd5, fp);
fclose (fp);
}
#endif
*/
#ifdef LITTLE_ENDIAN
memswp (IS->ipack, sizeof (sInt4), IS->nd5);
#endif
} else {
gribLen = IS->ipack[3];
}
free (buff);
/* Loop through the grib message looking for the subgNum grid. subgNum
* goes from 0 to n-1. */
for (j = 0; j <= subgNum; j++) {
if (j == 0) {
inew = 1;
} else {
inew = 0;
}
/* Note we are getting data back either as a float or an int, but not
* both, so we don't need to allocated room for both. */
unpk_grib2 (&kfildo, (float *) (IS->iain), IS->iain, &(IS->nd2x3),
IS->idat, &(IS->nidat), IS->rdat, &(IS->nrdat), IS->is[0],
&(IS->ns[0]), IS->is[1], &(IS->ns[1]), IS->is[2],
&(IS->ns[2]), IS->is[3], &(IS->ns[3]), IS->is[4],
&(IS->ns[4]), IS->is[5], &(IS->ns[5]), IS->is[6],
&(IS->ns[6]), IS->is[7], &(IS->ns[7]), IS->ib, &ibitmap,
IS->ipack, &(IS->nd5), &xmissp, &xmisss, &inew, &iclean,
&l3264b, f_endMsg, jer, &ndjer, &kjer);
/*
* Check for error messages...
* If we get an error message, print it, and return.
*/
for (i = 0; i < (uInt4) kjer; i++) {
if (jer[ndjer + i] == 0) {
/* no error. */
} else if (jer[ndjer + i] == 1) {
/* Warning. */
#ifdef DEBUG
printf ("Warning: Unpack library warning code (%d %d)\n",
jer[i], jer[ndjer + i]);
#endif
} else {
/* BAD Error. */
errSprintf ("ERROR: Unpack library error code (%ld %ld)\n",
jer[i], jer[ndjer + i]);
return -3;
}
}
}
/* Parse the meta data out. */
if (MetaParse (meta, IS->is[0], IS->ns[0], IS->is[1], IS->ns[1],
IS->is[2], IS->ns[2], IS->rdat, IS->nrdat, IS->idat,
IS->nidat, IS->is[3], IS->ns[3], IS->is[4], IS->ns[4],
IS->is[5], IS->ns[5], gribLen, xmissp, xmisss, simpVer)
!= 0) {
#ifdef DEBUG
FILE *fp;
if ((fp = fopen ("dump.is0", "wt")) != NULL) {
for (i = 0; i < 8; i++) {
fprintf (fp, "---Section %d---\n", (int) i);
for (j = 1; j <= IS->ns[i]; j++) {
fprintf (fp, "IS%d Item %d = %d\n", (int) i, (int) j, IS->is[i][j - 1]);
}
}
fclose (fp);
}
#endif
preErrSprintf ("Inside ReadGrib2Record.. Problems in MetaParse\n");
return -4;
}
if ((majEarth > 6000) && (majEarth < 7000)) {
if ((minEarth > 6000) && (minEarth < 7000)) {
meta->gds.f_sphere = 0;
meta->gds.majEarth = majEarth;
meta->gds.minEarth = minEarth;
} else {
meta->gds.f_sphere = 1;
meta->gds.majEarth = majEarth;
meta->gds.minEarth = majEarth;
}
}
/* Figure out an equation to pass to ParseGrid to convert the units for
* this grid. */
/*
if (ComputeUnit (meta->pds2.prodType, meta->pds2.sect4.templat,
meta->pds2.sect4.cat, meta->pds2.sect4.subcat, f_unit,
&unitM, &unitB, unitName) == 0) {
*/
if (ComputeUnit (meta->convert, meta->unitName, f_unit, &unitM, &unitB,
unitName) == 0) {
unitLen = strlen (unitName);
meta->unitName = (char *) realloc ((void *) (meta->unitName),
1 + unitLen * sizeof (char));
strncpy (meta->unitName, unitName, unitLen);
meta->unitName[unitLen] = '\0';
}
/* compute the subgrid. */
/*
if ((lwlf->lat != -100) && (uprt->lat != -100)) {
Nx = meta->gds.Nx;
Ny = meta->gds.Ny;
if (computeSubGrid (lwlf, &x1, &y1, uprt, &x2, &y2, &(meta->gds),
&newGds) != 0) {
preErrSprintf ("ERROR: In compute subgrid.\n");
return 1;
}
// I couldn't decide if I should "permanently" change the GDS or not.
// when I wrote computeSubGrid. If next line stays, really should
// rewrite computeSubGrid.
memcpy (&(meta->gds), &newGds, sizeof (gdsType));
f_subGrid = 1;
} else {
Nx = meta->gds.Nx;
Ny = meta->gds.Ny;
x1 = 1;
x2 = Nx;
y1 = 1;
y2 = Ny;
f_subGrid = 0;
}
*/
Nx = meta->gds.Nx;
Ny = meta->gds.Ny;
x1 = 1;
x2 = Nx;
y1 = 1;
y2 = Ny;
f_subGrid = 0;
/* Figure out if we need iain or ain, and set it to Grib_Data. At the
* same time handle any bitmaps, and compute some statistics. */
if ((f_subGrid) && (meta->gds.scan != 64)) {
errSprintf ("Can not do a subgrid of non scanmode 64 grid yet.\n");
return -3;
}
if (strcmp (meta->element, "Wx") != 0) {
ParseGrid (&(meta->gridAttrib), Grib_Data, grib_DataLen, Nx, Ny,
meta->gds.scan, IS->iain, ibitmap, IS->ib, unitM, unitB, 0,
NULL, f_subGrid, x1, y1, x2, y2);
} else {
/* Handle weather grid. ParseGrid looks up the values... If they are
* "<Invalid>" it sets it to missing (or creates one). If the table
* entry is used it sets f_valid to 2. */
ParseGrid (&(meta->gridAttrib), Grib_Data, grib_DataLen, Nx, Ny,
meta->gds.scan, IS->iain, ibitmap, IS->ib, unitM, unitB, 1,
(sect2_WxType *) &(meta->pds2.sect2.wx), f_subGrid, x1, y1,
x2, y2);
/* compact the table to only those which are actually used. */
cnt = 0;
for (i = 0; i < meta->pds2.sect2.wx.dataLen; i++) {
if (meta->pds2.sect2.wx.ugly[i].f_valid == 2) {
meta->pds2.sect2.wx.ugly[i].validIndex = cnt;
cnt++;
} else if (meta->pds2.sect2.wx.ugly[i].f_valid == 3) {
meta->pds2.sect2.wx.ugly[i].f_valid = 0;
meta->pds2.sect2.wx.ugly[i].validIndex = cnt;
cnt++;
} else {
meta->pds2.sect2.wx.ugly[i].validIndex = -1;
}
}
}
/* Figure out some other non-section oriented meta data. */
/* strftime (meta->refTime, 20, "%Y%m%d%H%M",
gmtime (&(meta->pds2.refTime)));
*/
Clock_Print (meta->refTime, 20, meta->pds2.refTime, "%Y%m%d%H%M", 0);
/*
strftime (meta->validTime, 20, "%Y%m%d%H%M",
gmtime (&(meta->pds2.sect4.validTime)));
*/
Clock_Print (meta->validTime, 20, meta->pds2.sect4.validTime,
"%Y%m%d%H%M", 0);
meta->deltTime = (sInt4) (meta->pds2.sect4.validTime - meta->pds2.refTime);
return 0;
}
/*****************************************************************************
* FindSectLen2to7() --
*
* Arthur Taylor / MDL
*
* PURPOSE
* Looks through a GRIB message and finds out the maximum size of each
* section. Simpler if there is only one grid in the message.
*
* ARGUMENTS
* c_ipack = The current GRIB2 message. (Input)
* gribLen = Length of c_ipack. (Input)
* ns = Array of section lengths. (Output)
* sectNum = Which section to start with. (Input)
* curTot = on going total read from c_ipack. (Input)
* nd2x3 = Total number of grid points (Output)
* table50 = Type of packing used. (See code table 5.0) (GS5_SIMPLE = 0,
* GS5_CMPLX = 2, GS5_CMPLXSEC = 3) (Output)
*
* FILES/DATABASES: None
*
* RETURNS: int (could use errSprintf())
* 0 = OK
* -1 = Ran of data in a section
* -2 = Section not properly labeled.
*
* HISTORY
* 3/2003 AAT: Created
*
* NOTES
* 1) Assumes that the pack method of multiple grids are the same.
*****************************************************************************
*/
static int FindSectLen2to7 (char *c_ipack, sInt4 gribLen, sInt4 ns[8],
char sectNum, sInt4 *curTot, sInt4 *nd2x3,
short int *table50)
{
sInt4 sectLen; /* The length of the current section. */
sInt4 li_temp; /* A temporary holder of sInt4s. */
if ((sectNum == 2) || (sectNum == 3)) {
/* Figure out the size of section 2 and 3. */
if (*curTot + 5 > gribLen) {
errSprintf ("ERROR: Ran out of data in Section 2 or 3\n");
return -1;
}
/* Handle optional section 2. */
if (c_ipack[*curTot + 4] == 2) {
MEMCPY_BIG (§Len, c_ipack + *curTot, 4);
*curTot = *curTot + sectLen;
if (ns[2] < sectLen)
ns[2] = sectLen;
if (*curTot + 5 > gribLen) {
errSprintf ("ERROR: Ran out of data in Section 3\n");
return -1;
}
}
/* Handle section 3. */
if (c_ipack[*curTot + 4] != 3) {
errSprintf ("ERROR: Section 3 labeled as %d\n",
c_ipack[*curTot + 4]);
return -2;
}
MEMCPY_BIG (§Len, c_ipack + *curTot, 4);
if (ns[3] < sectLen)
ns[3] = sectLen;
/* While we are here, grab the total number of grid points nd2x3. */
MEMCPY_BIG (&li_temp, c_ipack + *curTot + 6, 4);
if (*nd2x3 < li_temp)
*nd2x3 = li_temp;
*curTot = *curTot + sectLen;
}
/*
#ifdef DEBUG
printf ("Section len (2=%ld) (3=%ld)\n", ns[2], ns[3]);
#endif
*/
/* Figure out the size of section 4. */
if (*curTot + 5 > gribLen) {
errSprintf ("ERROR: Ran out of data in Section 4\n");
return -1;
}
if (c_ipack[*curTot + 4] != 4) {
errSprintf ("ERROR: Section 4 labeled as %d\n", c_ipack[*curTot + 4]);
return -2;
}
MEMCPY_BIG (§Len, c_ipack + *curTot, 4);
if (ns[4] < sectLen)
ns[4] = sectLen;
*curTot = *curTot + sectLen;
/*
#ifdef DEBUG
printf ("Section len (4=%ld < %ld)\n", sectLen, ns[4]);
#endif
*/
/* Figure out the size of section 5. */
if (*curTot + 5 > gribLen) {
errSprintf ("ERROR: Ran out of data in Section 5\n");
return -1;
}
if (c_ipack[*curTot + 4] != 5) {
errSprintf ("ERROR: Section 5 labeled as %d\n", c_ipack[*curTot + 4]);
return -2;
}
MEMCPY_BIG (§Len, c_ipack + *curTot, 4);
/* While we are here, grab the packing method. */
MEMCPY_BIG (table50, c_ipack + *curTot + 9, 2);
if (ns[5] < sectLen)
ns[5] = sectLen;
*curTot = *curTot + sectLen;
/*
#ifdef DEBUG
printf ("Section len (5=%ld < %ld)\n", sectLen, ns[5]);
#endif
*/
/* Figure out the size of section 6. */
if (*curTot + 5 > gribLen) {
errSprintf ("ERROR: Ran out of data in Section 6\n");
return -1;
}
if (c_ipack[*curTot + 4] != 6) {
errSprintf ("ERROR: Section 6 labeled as %d\n", c_ipack[*curTot + 4]);
return -2;
}
MEMCPY_BIG (§Len, c_ipack + *curTot, 4);
if (ns[6] < sectLen)
ns[6] = sectLen;
*curTot = *curTot + sectLen;
/*
#ifdef DEBUG
printf ("Section len (6=%ld < %ld)\n", sectLen, ns[6]);
#endif
*/
/* Figure out the size of section 7. */
if (*curTot + 5 > gribLen) {
errSprintf ("ERROR: Ran out of data in Section 7\n");
return -1;
}
if (c_ipack[*curTot + 4] != 7) {
errSprintf ("ERROR: Section 7 labeled as %d\n", c_ipack[*curTot + 4]);
return -2;
}
MEMCPY_BIG (§Len, c_ipack + *curTot, 4);
if (ns[7] < sectLen)
ns[7] = sectLen;
*curTot = *curTot + sectLen;
/*
#ifdef DEBUG
printf ("Section len (7=%ld < %ld)\n", sectLen, ns[7]);
#endif
*/
return 0;
}
/*****************************************************************************
* ReadSect0() -- Review 12/2002
*
* Arthur Taylor / MDL
*
* PURPOSE
* Looks for the next GRIB message, by looking for the keyword "GRIB". It
* expects the message in "expect" bytes from the start, but could find the
* message in "expect2" bytes or 0 bytes from the start. Returns -1 if it
* can't find "GRIB", 1 if "GRIB" is not 0, "expect", or "expect2" bytes from
* the start.
* It stores the bytes it reads (a max of "expect") upto but not including
* the 'G' in "GRIB" in wmo.
*
* After it finds section 0, it then parses the 16 bytes that make up
* section 0 so that it can return the length of the entire GRIB message.
*
* When done, it sets fp to point to the end of Sect0.
*
* The reason for this procedure is so that we can read in the size of the
* grib message, and thus allocate enough memory to read the message in before
* making it Big endian, and passing it to the library for unpacking.
*
* ARGUMENTS
* fp = A pointer to an opened file in which to read.
* When done, this points to the start of section 1. (Input/Output)
* buff = The data between messages. (Input/Output)
* buffLen = The length of buff (Output)
* limit = How many bytes to read before giving up and stating it is not
* a proper message. (-1 means no limit). (Input)
* sect0 = The read in Section 0 (as seen on disk). (Output)
* gribLen = Length of this GRIB message. (Output)
* version = 1 if GRIB1 message, 2 if GRIB2 message, -1 if TDLP message.
* (Output)
* expect = The expected number of bytes to find "GRIB" in. (Input)
* expect2 = The second possible number of bytes to find "GRIB" in. (Input)
* wmo = Assumed allocated to be at least size "expect".
* Holds the bytes before the first "GRIB" message.
* expect should be > expect2, but is up to caller (Output)
* wmoLen = Length of wmo (total number of bytes read - SECT0LEN_WORD * 4).
* (Output)
*
* FILES/DATABASES:
* An already opened "GRIB2" File
*
* RETURNS: int (could use errSprintf())
* 1 = Length of wmo was != 0 and was != expect
* 0 = OK
* -1 = Couldn't find "GRIB" part of message.
* -2 = Ran out of file while reading this section.
* -3 = Grib version was not 1 or 2.
* -4 = Most significant sInt4 of GRIB length was not 0
* -5 = Grib message length was <= 16 (can't be smaller than just sect 0)
*
* HISTORY
* 9/2002 Arthur Taylor (MDL/RSIS): Created.
* 11/2002 AAT: Combined with ReadWMOHeader
* 12/2002 (TK,AC,TB,&MS): Code Review.
* 1/2003 AAT: Bug found. wmo access out of bounds of expect when setting
* the /0 element, if wmoLen > expect.
* 4/2003 AAT: Added ability to handle GRIB version 1.
* 5/2003 AAT: Added limit option.
* 8/2003 AAT: Removed dependence on offset, and fileLen.
* 10/2004 AAT: Modified to allow for TDLP files
*
* NOTES
* 1a) 1196575042L == ASCII representation of "GRIB" (GRIB in MSB)
* 1b) 1112101447L == ASCII representation of "BIRG" (GRIB in LSB)
* 1c) 1413762128L == ASCII representation of "TDLP" (TDLP in MSB)
* 1d) 1347175508L == ASCII representation of "PLDT" (TDLP in LSB)
* 2) Takes advantage of the wordType to check that the edition is correct.
* 3) May want to return prodType.
* 4) WMO_HEADER_ORIG_LEN was added for backward compatibility... should be
* removed when we no longer use old format. (say in a year from 11/2002)
*
*****************************************************************************
*/
int ReadSECT0 (DataSource &fp, char **buff, uInt4 *buffLen, sInt4 limit,
sInt4 sect0[SECT0LEN_WORD], uInt4 *gribLen, int *version)
{
typedef union {
sInt4 li;
unsigned char buffer[4];
} wordType;
uChar gribMatch = 0; /* Counts how many letters in GRIB we've matched. */
uChar tdlpMatch = 0; /* Counts how many letters in TDLP we've matched. */
wordType word; /* Used to check that the edition is correct. */
uInt4 curLen; /* Where we currently are in buff. */
uInt4 i; /* Used to loop over the first few char's */
uInt4 stillNeed; /* Number of bytes still needed to get 1st 8 bytes of
* message into memory. */
/* Get first 8 bytes. If GRIB we don't care. If TDLP, this is the length
* of record. Read at least 1 record (length + 2 * 8) + 8 (next record
* length) + 8 bytes before giving up. */
curLen = 8;
if (*buffLen < curLen) {
*buffLen = curLen;
*buff = (char *) realloc ((void *) *buff, *buffLen * sizeof (char));
}
if (fp.DataSourceFread(*buff, sizeof (char), curLen) != curLen) {
errSprintf ("ERROR: Couldn't find 'GRIB' or 'TDLP'\n");
return -1;
}
/*
Can't do the following because we don't know if the file is a GRIB file or
not, or if it was a FORTRAN file.
if (limit > 0) {
MEMCPY_BIG (&recLen, *buff, 4);
limit = (limit > recLen + 32) ? limit : recLen + 32;
}
*/
while ((tdlpMatch != 4) && (gribMatch != 4)) {
for (i = curLen - 8; i + 3 < curLen; i++) {
if ((*buff)[i] == 'G') {
if (((*buff)[i + 1] == 'R') && ((*buff)[i + 2] == 'I') &&
((*buff)[i + 3] == 'B')) {
gribMatch = 4;
break;
}
} else if ((*buff)[i] == 'T') {
if (((*buff)[i + 1] == 'D') && ((*buff)[i + 2] == 'L') &&
((*buff)[i + 3] == 'P')) {
tdlpMatch = 4;
break;
}
}
}
stillNeed = i - (curLen - 8);
/* Read enough of message to have the first 8 bytes (including ID). */
if (stillNeed != 0) {
curLen += stillNeed;
if ((limit >= 0) && (curLen > (size_t) limit)) {
errSprintf ("ERROR: Couldn't find type in %ld bytes\n", limit);
return -1;
}
if (*buffLen < curLen) {
*buffLen = curLen;
*buff = (char *) realloc ((void *) *buff,
*buffLen * sizeof (char));
}
if (fp.DataSourceFread((*buff) + (curLen - stillNeed), sizeof (char), stillNeed) != stillNeed) {
errSprintf ("ERROR: Ran out of file reading SECT0\n");
return -1;
}
}
}
/* curLen and (*buff) hold 8 bytes of section 0. */
curLen -= 8;
memcpy (&(sect0[0]), (*buff) + curLen, 4);
#ifdef DEBUG
#ifdef LITTLE_ENDIAN
myAssert ((sect0[0] == 1112101447L) || (sect0[0] == 1347175508L));
#else
myAssert ((sect0[0] == 1196575042L) || (sect0[0] == 1413762128L));
#endif
#endif
memcpy (&(sect0[1]), *buff + curLen + 4, 4);
/* Make sure we don't pass back part of "GRIB" in the buffer. */
(*buff)[curLen] = '\0';
*buffLen = curLen;
word.li = sect0[1];
if (tdlpMatch == 4) {
if (word.buffer[3] != 0) {
errSprintf ("ERROR: unexpected version of TDLP in SECT0\n");
return -2;
}
*version = -1;
/* Find out the GRIB Message Length */
*gribLen = GRIB_UNSIGN_INT3 (word.buffer[0], word.buffer[1],
word.buffer[2]);
/* Min message size: GRIB1=52, TDLP=59, GRIB2=86. */
if (*gribLen < 59) {
errSprintf ("TDLP length %ld was < 59?\n", *gribLen);
return -5;
}
} else if (word.buffer[3] == 1) {
*version = 1;
/* Find out the GRIB Message Length */
*gribLen = GRIB_UNSIGN_INT3 (word.buffer[0], word.buffer[1],
word.buffer[2]);
/* Min message size: GRIB1=52, TDLP=59, GRIB2=86. */
if (*gribLen < 52) {
errSprintf ("GRIB1 length %ld was < 52?\n", *gribLen);
return -5;
}
} else if (word.buffer[3] == 2) {
*version = 2;
/* Make sure we still have enough file for the rest of section 0. */
if (fp.DataSourceFread(sect0 + 2, sizeof (sInt4), 2) != 2) {
errSprintf ("ERROR: Ran out of file reading SECT0\n");
return -2;
}
if (sect0[2] != 0) {
errSprintf ("Most significant sInt4 of GRIB length was not 0?\n");
errSprintf ("This is either an error, or we have a single GRIB "
"message which is larger than 2^31 = 2,147,283,648 "
"bytes.\n");
return -4;
}
#ifdef LITTLE_ENDIAN
revmemcpy (gribLen, &(sect0[3]), sizeof (sInt4));
#else
*gribLen = sect0[3];
#endif
} else {
errSprintf ("ERROR: Not TDLPack, and Grib edition is not 1 or 2\n");
return -3;
}
return 0;
}
/*****************************************************************************
* GRIB2Split() --
*
* Arthur Taylor / MDL
*
* PURPOSE
* Splits a file into its component GRIB messages (doesn't break up
* subgrids).
*
* ARGUMENTS
* filename = File to split. (Input)
* msgNum = Which message to look for (0 all, value otherwise). (Input)
* curMsg = Number of messages we've already looked at.
* In the procedured is the current message we are on. (Input)
*
* FILES/DATABASES:
* Opens a GRIB2 file for reading given its filename.
*
* RETURNS: int
* +# = number of GRIB2 messages in the file.
* -1 = Problems opening file for read.
*
* HISTORY
* 5/2010 Arthur Taylor (MDL): Created.
*
* NOTES
*****************************************************************************
*/
int GRIB2Split (char *filename, int msgNum, int curMsg)
{
int grib_limit; /* How many bytes to look for before the first "GRIB"
* in the file. If not found, is not a GRIB file. */
FILE *fp; /* The opened GRIB2 file. */
sInt4 offset = 0; /* Where we are in the file. */
char *ptr; /* used to find the file extension. */
char *buff; /* Holds the info between records. */
uInt4 buffLen; /* Length of info between records. */
int c; /* Determine if end of the file without fileLen. */
sInt4 sect0[SECT0LEN_WORD]; /* Holds the current Section 0. */
uInt4 gribLen; /* Length of the current GRIB message. */
int version; /* Which version of GRIB is in this message. */
char *msg; /* Used to pop messages off the error Stack. */
sInt4 fileLen; /* Length of the GRIB2 file. */
char *outName = NULL; /* Name of the output file. */
FILE *op; /* The opened output file. */
int i; /* loop counter while writing bytes to output file. */
grib_limit = GRIB_LIMIT;
if (filename != NULL) {
if ((fp = fopen (filename, "rb")) == NULL) {
errSprintf ("ERROR: Problems opening %s for read.", filename);
return -1;
}
ptr = strrchr (filename, '.');
if (ptr != NULL) {
if (strcmp (ptr, ".tar") == 0) {
grib_limit = 5000;
}
}
outName = (char *) malloc (strlen (filename) + 1 + 11);
} else {
fp = stdin;
outName = (char *) malloc (strlen ("split.grb") + 1 + 11);
}
buff = NULL;
buffLen = 0;
while ((c = fgetc (fp)) != EOF) {
ungetc (c, fp);
/* curMsg++ done first so any error messages range from 1..n, instead
* of 0.. n-1. Note curMsg should end up as n not (n-1) */
curMsg++;
/* Allow 2nd, 3rd, etc messages to have no limit to finding "GRIB". */
if (curMsg > 1) {
grib_limit = -1;
}
/* Read in the wmo header and sect0. */
if (ReadSECT0 (fp, &buff, &buffLen, grib_limit, sect0, &gribLen,
&version) < 0) {
if (curMsg == 1) {
/* Handle case where we couldn't find 'GRIB' in the message. */
preErrSprintf ("Inside GRIB2Split, Message # %d\n", curMsg);
free (buff);
free (outName);
fclose (fp);
return -2;
} else {
/* Handle case where there are trailing bytes. */
msg = errSprintf (NULL);
printf ("Warning: Inside GRIB2Split, Message # %d\n",
curMsg);
printf ("%s", msg);
free (msg);
/* find out how big the file is. */
fseek (fp, 0L, SEEK_END);
fileLen = ftell (fp);
/* fseek (fp, 0L, SEEK_SET); */
printf ("There were %ld trailing bytes in the file.\n",
fileLen - offset);
curMsg --;
free (buff);
free (outName);
fclose (fp);
return curMsg;
}
}
if (version == -1) {
/* TDLPack uses 4 bytes for FORTRAN record size, then another 8
* bytes for the size of the record (so FORTRAN can see it), then
* the data rounded up to an 8 byte boundary, then a trailing 4
* bytes for a final FORTRAN record size. However it only stores
* in_ the gribLen the non-rounded amount, so we need to take care
* of the rounding, and the trailing 4 bytes here. */
gribLen = ((sInt4) ceil (gribLen / 8.0)) * 8 + 4;
}
/* Write to file from buffLen to buffLen + gribLen bytes. */
if ((msgNum == 0) || (curMsg == msgNum)) {
if (filename != NULL) {
sprintf (outName, "%s.%d", filename, curMsg);
} else {
sprintf (outName, "split.grb.%d", curMsg);
}
if ((op = fopen (outName, "wb")) == NULL) {
errSprintf ("ERROR: Problems opening %s for write.", outName);
free (buff);
free (outName);
fclose (fp);
return -1;
}
fseek (fp, offset + buffLen, SEEK_SET);
for (i = 0; i < gribLen; i++) {
if ((c = getc(fp)) == EOF) {
errSprintf ("ERROR: Reached end of file too soon?");
free (buff);
free (outName);
fclose (fp);
return -1;
}
putc (c, op);
}
fclose (op);
}
/* Continue on to the next GRIB2 message. */
offset += buffLen + gribLen;
fseek (fp, offset, SEEK_SET);
}
free (buff);
free (outName);
fclose (fp);
return curMsg;
}