DataMapAddScalar

Syntax

int DataMapAddScalar(struct DataMap *ptr, char *name,int type,void *data);

Header

general/dmap.h

Library

dmap

Description

The DataMapAddScalar function adds a scalar variable to a DataMap data structure.

The data structure is pointed to by the argument ptr. The name of the scalar variable to add is given by the zero terminated string pointed to by the argument name.

The scalar type is given by the argument type. Possible values are:

DATACHAR	A single character of type `char`.
DATASHORT	A 16-bit short integer of type `int16`.
DATAINT	A 32-bit integer integer of type `int32`.
DATAFLOAT	A single precision floating point number of type `float`.
DATADOUBLE	A double precision floating point number of type `double`.
DATASTRING	A pointer to a zero terminated text string of type `char *`.

The argument data is a pointer to the location that stores the scalar value.

Returns

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

Errors

On error, (-1) is returned.

Example

Source Code: DataMapAddScalar.c

/* DataMapAddScalar.c
   ==================
   Author: R.J.Barnes
 Copyright (c) 2012 The Johns Hopkins University/Applied Physics Laboratory

This file is part of the Radar Software Toolkit (RST).

RST is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.

Modifications:

*/


#include <stdio.h>
#include <stdlib.h>

#include "rtypes.h"
#include "dmap.h"



int main(int argc,char *argv[]) {

  int t;

  int value=0;

  struct DataMap *dmap;

  dmap=DataMapMake();

  DataMapAddScalar(dmap,"value",DATAINT,&value);

  for (t=0;t<100;t++) {
    value=value+1;
    DataMapFwrite(stdout,dmap);
  }
  DataMapFree(dmap);
  return 0;

}