ConvertBlock

Syntax

void ConvertBlock(unsigned char *cnv,int *pattern);

Header

base/rconvert.h

Library

Description

The ConvertBlock function converts a set of bytes into a sequence of numbers. The byte order is reversed on big-endian systems, this ensures that the byte order written and read from a file is always little-endian.

The numbers to convert are pointed to by the argument cnv. Pairs of elements from the array pointed to by the argument pattern define the conversion process. The value of the first number defines the number type; (8) for double, (4) for float and int32 (32-bit integers), and (2) for int16 (16-bit integers). The value of the second element defines how many times that type is repeated. Elements are read from the array until a zero is encountered.

Returns

None

Errors

None

Example

Source Code: ConvertBlock.c

/* ConvertBlock.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 "rtypes.h"
#include "rconvert.h"

int main(int argc,char *argv[]) {
  int i;
  
  
  struct {
    double x,y,z;
    int16 flg;
    int32 data[4];
    float angle;
  } dat;
  
  int pattern[]={8,3,2,1,4,4,4,1,0,0};
  
  unsigned char *str;
  
  dat.x=0.5;
  dat.y=0.2;
  dat.z=0.3;
  dat.flg=1023;
  dat.data[0]=18000;
  dat.data[1]=32000;
  dat.data[2]=64000;
  dat.data[3]=12000;
  dat.angle=45.5;
   
  str=(unsigned char *) &dat;
 
 
  ConvertBlock(str,pattern);
  fprintf(stdout,"buf=");
  for (i=0;i<sizeof(dat);i++) fprintf(stdout,"%.2x",str[i]);
  fprintf(stdout,"'n");
  
  return 0;
}