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Vec2.cc

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/*
    File:           Vec2.cc

    Function:       Implements Vec2.h

    Author(s):      Andrew Willmott

    Copyright:      (c) 1995-2000, Andrew Willmott

    Notes:          

*/


#include "vl/Vec2.h"
#include <ctype.h>
#include <iomanip.h>


ostream &operator << (ostream &s, const TVec2 &v)
{
    Int w = s.width();

    return(s << '[' << v[0] << ' ' << setw(w) << v[1] << ']');
}

istream &operator >> (istream &s, TVec2 &v)
{
    TVec2   result;
    Char    c;
    
    // Expected format: [1 2]
    
    while (s >> c && isspace(c))        
        ;
        
    if (c == '[')                       
    {
        s >> result[0] >> result[1];    

        if (!s)
        {
            cerr << "Error: Expected number while reading vector\n";
            return(s);
        }
            
        while (s >> c && isspace(c))
            ;
            
        if (c != ']')
        {
            s.clear(ios::failbit);
            cerr << "Error: Expected ']' while reading vector\n";
            return(s);
        }
    }
    else
    {
        s.clear(ios::failbit);
        cerr << "Error: Expected '[' while reading vector\n";
        return(s);
    }
    
    v = result;
    return(s);
}

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