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Full Discussion: Reading tokens
Top Forums Programming Reading tokens Post 302900297 by kristinu on Tuesday 6th of May 2014 06:41:23 AM
Old 05-06-2014
Reading tokens
I have a String class with a function that reads tokens using a delimiter.

For example

Code:
  String sss = "6:8:12:16";
  nfb = sss.nfields_b (':');
  String tkb1 = sss.get_token_b (':');
  String tkb2 = sss.get_token_b (':');
  String tkb3 = sss.get_token_b (':');
  String tkb4 = sss.get_token_b (':');
  cout << "nfb: " << nf << endl;
  cout << "tkb1:" << tkb1 << endl;  
  cout << "tkb2:" << tkb2 << endl;  
  cout << "tkb3:" << tkb3 << endl;  
  cout << "tkb4:" << tkb4 << endl;  

  nfb: 4
  tkb1:6
  tkb2:8
  tkb3:12
  tkb4:16

I want to replace she current code with something simpler

Code:
String
get_token
  (
    String&     a,
    const char  del = ' '
  )  

{
  string b = a.STR;
  int firstFound = b.find (del, 0);
  int nextFound = b.find (del, firstFound+1);
  if (nextFound >= 0)
    {
      return (a.substr (firstFound+1, nextFound-firstFound-2));
    }
  else 
    {
      return ("");
    }
}

This only gets me the second tag, which is 8. So will need modification. Not sure how much the current code may be simplified.


The current code is below

Code:
String
get_token_b
  (
    String&     a,
    const char  del = ' ' 
  )

{

  int  b = a.PTR;

  if ( a.PTR == a.SIZE )   
    { 
      return String(""); 
    }
  
  while ( b < a.SIZE && a.STR[b] == del )
    { 
      b++; 
    }
  
  int  e = b;

  while ( e < a.SIZE && a.STR[e] != del )
    { 
      e++; 
    }
  
  if ( b == a.SIZE )
    { 
      return String(""); 
    }
  
  a.PTR = e;
  e--;
  
  return  a.substr_b(b, e);
  
}

 

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LEARN ABOUT DEBIAN

skycoor

skycoor(1)						      General Commands Manual							skycoor(1)

Name
       skycoor - Convert coordinates

Synopsis
       skycoor [-bdgjv] [-n ndec] ra1 dec1 sys1 ... ran decn sysn
       or
       skycoor [-vbjg] [-n ndec] @listfile

Description
       skycoor	converts  coordinates  between the J2000, B1950, and galactic coordinate systems, rounding to a specified number of decimal places
       and printing in degrees or hh:mm:ss.sss dd:mm:ss.sss.  Input coordinates may also be in either format, and the system (J2000, B1950, or ga-
       lactic) may be in upper or lower case.  No spaces are allowed within  the individual coordinates

Options
       -b     B1950 (FK4) output

       -d     RA and Dec output in degrees

       -e     Ecliptic longitude and latitude output

       -g     Galactic longitude and latitude output

       -i r|d|
	      Input units (r=radians, d=degrees, else hh:mm:sss dd:mm:sss)

       -j     J2000 (FK5) output

       -n <num>
	      Number of decimal places in output RA seconds

       -o <num>
	      Offset coordinates by this many arcseconds

       -p     RA and Dec proper motion in milliarcseconds/year

       -q     Output system, including equinox

       -r <RA> <Dec> <RA> <Dec>
	      Angular separation between two RA, Dec pairs

       -s     Output ra= dec= epoch= radecsys= for sethead

       -v     Print more intermediate information

       -w     Convert RA, Dec equatorial coordinates to x,y,z

       -x     Convert x,y,z equatorial coordinates to RA, Dec

       -y <epoch>
	      Epoch of coordinates in years

Author
       Doug Mink, SAO (dmink@cfa.harvard.edu)

9 November 2001 						     WCSTools								skycoor(1)
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