RCDFReadZ

Syntax

int RCDFReadZ(CDFid id,int recno,char **varname,struct RCDFData *ptr);

Header

analysis/rcdf.h

Library

rcdf

Description

The RCDFReadZ function reads a set of Z variables from and open CDF file.

The CDF file is identified by the argument id and the argument recno defines the record number to read. The argument varname is a NULL terminated array of variable names to extract from the record. Each variable it stored in the appropriate element of the array of structures pointed to by the argument ptr.

Returns

Returns zero on success. On error, a (-1) is returned.

Errors

On error, a (-1) is returned.

Example

Source Code: RCDFReadZ.c

/* RCDFReadZ.c
   ===========
   Author: R.J.Barnes
*/


#include <stdio.h>
#include <stdlib.h>
#include <cdf.h>
#include "rcdf.h"


int main(int argc,char *argv[]) {
  char *varname[256];
  struct RCDFData vardata[256];

  int n,recno;
  CDFid id;
  CDFstatus status;
  int max;

  fprintf(stdout,"RCDFReadZ'n");
  if (argc<4) {
    fprintf(stderr,"Filename, record number and variable must be given.'n");
    exit(-1);
  } 

  recno=atoi(argv[2]);
  for (n=0;n<argc-3;n++) varname[n]=argv[n+3];
  varname[argc-3]=0;

 
  status=CDFopen(argv[1],&id);
  if (status !=CDF_OK) {
     fprintf(stderr,"Could not open cdf file.'n");
     exit(-1);
  }

  max=RCDFReadZ(id,recno,varname,vardata);

  CDFclose(id);
  
  for (n=0;n<argc-3;n++)
    fprintf(stdout,"%s %d %d %d %d'n",vardata[n].name,(int) vardata[n].status,
	    vardata[n].num,vardata[n].type,vardata[n].numdim);
  
  return 0;
}