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#include "mfhdf.h"
#include <math.h>
/* ReadLevels */
main()
{
intn status, i, j;
int32 ptfid, n, nt, sz;
int32 PTid, date, i32;
float32 rain, temp, conc[4];
float64 lon, lat, time;
int32 fldsz, fldlevels[32], nattr;
int32 fldtype[32], fldorder[32], recs[128];
char *pntr, *buffer, id[2], desc[16], spc[8];
char fldlist[128], *attrnames;
int32 strbufsize;
/*
* Open the HDF swath file, "PointFile.hdf".
*/
ptfid = PTopen("PointFile_created_with_hadeos_sample_file_writer_of_HDFEOS2_version_219_or_higher_release.hdf", DFACC_READ);
if(ptfid == -1)
{
printf("\t\tError: Unable to open file PointFile.hdf\n");
return -1;
}
/* Read Simple Point */
/* ----------------- */
PTid = PTattach(ptfid, "Simple Point");
if (PTid == -1)
{
printf("\t\tError: Cannot attach point \"Simple Point\"\n");
return -1;
}
strcpy(fldlist,"");
status = PTlevelinfo(PTid, 0, fldlist, fldtype, fldorder);
if (status == -1)
{
printf("\t\tError: Cannot get level info for point \"Simple Point\"\n");
return -1;
}
fldsz = PTsizeof(PTid, fldlist, fldlevels);
if (fldsz == -1)
{
printf("\t\tError: Cannot get field size of \"Simple Point\"\n");
return -1;
}
n = PTnrecs(PTid, 0);
if (n == -1)
{
printf("\t\tError: point \"Simple Point\" has no records.\n");
return -1;
}
if(fldsz == 0)
{
printf("\t\tError: Cannot allocate mamory for buffer; fldsz == 0\n");
return -1;
}
buffer = (char *) calloc(n * fldsz, 1);
for (i=0; i<n; i++)
{
recs[i] = i;
}
status = PTreadlevel(PTid, 0, fldlist, n, recs, buffer);
if (status == -1)
{
printf("\t\tError: Cannot read level for point \"Simple Point\"\n");
return -1;
}
pntr = buffer;
for (i=0; i<n; i++)
{
memcpy(&time, pntr, 8);
pntr += 8;
memcpy(conc, pntr, 4*4);
pntr += 4*4;
memcpy(spc, pntr, 4);
pntr += 4;
printf("%12.1f %6.2f %6.2f %6.2f %6.2f %s\n",
time,conc[0],conc[1],conc[2],conc[3],spc);
}
free(buffer);
PTdetach(PTid);
/* Read Fixed Buoy Point */
/* --------------------- */
PTid = PTattach(ptfid, "FixedBuoy Point");
if (status == -1)
{
printf("\t\tError: Cannot get level info for point \"FixedBuoy Point\"\n");
return -1;
}
/* Read First (0th) Level */
/* ----------------------- */
strcpy(fldlist,"");
status = PTlevelinfo(PTid, 0, fldlist, fldtype, fldorder);
if (status == -1)
{
printf("\t\tError: Cannot get level info for point \"FixedBuoy Point\"\n");
return -1;
}
fldsz = PTsizeof(PTid, fldlist, fldlevels);
if (fldsz == -1)
{
printf("\t\tError: Cannot get field size of \"FixedBuoy Point\"\n");
return -1;
}
n = PTnrecs(PTid, 0);
if (n == -1)
{
printf("\t\tError: point \"Simple Point\" has no records.\n");
return -1;
}
for (i=0; i<n; i++)
{
recs[i] = i;
}
if(fldsz == 0)
{
printf("\t\tError: Cannot allocate mamory for buffer; fldsz == 0\n");
return -1;
}
buffer = (char *) calloc(n * fldsz, 1);
printf("\n");
n=1;
recs[0]=0;
status = PTreadlevel(PTid, 0, fldlist, n, recs, buffer);
if (status == -1)
{
printf("\t\tError: Cannot read level for point \"FixedBuoy Point\"\n");
return -1;
}
pntr = buffer;
for (i=0; i<n; i++)
{
memcpy(desc, pntr, 8);
pntr += 8;
desc[8] = 0;
memcpy(&lon, pntr, 8);
pntr += 8;
memcpy(&lat, pntr, 8);
pntr += 8;
memcpy(&date, pntr, 4);
pntr += 4;
memcpy(id, pntr, 1);
pntr += 1;
id[1]=0;
printf("%-10s %12.6lf %12.6lf %10d %-4s\n", desc,lon,lat,date,id);
}
printf("\n");
free(buffer);
/* Read Second (1th) Level */
/* ------------------------ */
strcpy(fldlist,"");
status = PTlevelinfo(PTid, 1, fldlist, fldtype, fldorder);
if (status == -1)
{
printf("\t\tError: Cannot get level info for point \"FixedBuoy Point\"\n");
return -1;
}
fldsz = PTsizeof(PTid, fldlist, fldlevels);
if (fldsz == -1)
{
printf("\t\tError: Cannot get field size of \"FixedBuoy Point\"\n");
return -1;
}
n = PTnrecs(PTid, 1);
if (n == -1)
{
printf("\t\tError: point \"FixedBuoy Point\" has no records.\n");
return -1;
}
if(fldsz == 0)
{
printf("\t\tError: Cannot allocate mamory for buffer; fldsz == 0\n");
return -1;
}
buffer = (char *) calloc(fldsz, 1);
for (i=0; i<n; i++)
{
pntr = buffer;
recs[0] = i;
status = PTreadlevel(PTid, 1, fldlist, 1, recs, buffer);
if (status == -1)
{
printf("\t\tError: Cannot read level for point \"FixedBuoy Point\"\n");
return -1;
}
memcpy(&time, pntr, 8);
pntr += 8;
memcpy(&rain, pntr, 4);
pntr += 4;
memcpy(&temp, pntr, 4);
pntr += 4;
memcpy(id, pntr, 1);
id[1]= 0;
pntr += 1;
printf("%12.1f %6.2f %6.2f %s\n", time,rain,temp,id);
}
free(buffer);
nattr = PTinqattrs(PTid, NULL,&strbufsize);
if (nattr == -1)
{
printf("\t\tError: Cannot inquire attributes for \"FixedBuoy Point\"\n");
return -1;
}
attrnames = (char *)malloc((strbufsize+1)*sizeof(char));
nattr = PTinqattrs(PTid, attrnames,&strbufsize);
if (nattr == -1)
{
printf("\t\tError: Cannot inquire attributes for \"FixedBuoy Point\"\n");
return -1;
}
status = PTreadattr(PTid, attrnames, &i32);
if (status == -1)
{
printf("\t\tError: Cannot read attribute for \"FixedBuoy Point\"\n");
return -1;
}
printf("\n");
printf("Attribute value for %s =%d\n", attrnames, i32);
status = PTattrinfo(PTid, "int32", &nt, &sz);
printf("\n");
if (status == -1)
{
printf("\t\tError: Cannot get attribute info for \"FixedBuoy Point\"\n");
return -1;
}
printf("\n");
PTdetach(PTid);
free(attrnames);
PTclose(ptfid);
return 0;
}
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