ConvertWriteDouble

Syntax

int ConvertWriteDouble(int fp,double val);

Header

base/rconvert.h

Library

Description

The ConvertWriteDouble function writes a variable of type double to an open file. The bytes are assumed to be in little-endian ordered.

The bytes are written to the file with the filed descriptor given by the argument fd and the double-precision floating point number is given by the argument val.

Returns

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

Errors

On error, a (-1) is returned.

Example

Source Code: ConvertWriteDouble.c

/* ConvertWriteDouble.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 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 General Public License for more details.

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

Modifications:



#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <zlib.h>
#include "rtypes.h"
#include "rconvert.h"

#define FNAME "test.dat"

int main(int argc,char *argv[]) {
  int i;
  double val[8]={0.1,0.2,0.5,-0.5,0.6,1.2,1.8,-0.8};
  int fd;
  fd=open(FNAME,O_WRONLY | O_CREAT);
   
  for (i=0;i<8;i++) ConvertWriteDouble(fd,val[i]);
  close(fd);
  
  return 0;
}