mansetw.cpp

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C++ 代码 · 共 77 行

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*                            Open Watcom Project
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* Description:
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#ifdef __SW_FH
#include "iost.h"
#else
#include "variety.h"
#include <iomanip>
#include <iostream>
#endif

// Note that each manipulator function takes a single parameter called
// "__p". This name is defined in the SMANIP_make macro definition. Each
// function creates an object of type SMANIPint or SMANIPlong. It copies
// "__p" into the "__p" member of the returned object, and copies a
// function pointer into the "__f" member. Later, when the returned
// object is operated upon by << or >>, an indirect call is made via the
// stored function pointer, passing "__p" as a value. This called
// function is the one that actually changes the state of the stream.

// Handles "setw" manipulator.
static std::ios &__setw( std::ios &strm, int width ) {
    strm.width( width );
    return( strm );
}

#ifdef MACRO_IOMANIP
namespace std {
  SMANIP_make( int, setw ) {
    // SMANIPint setw( int __p )
    //      Set the width used for output conversion of values.
    return SMANIPint( __setw, __p );
  }
}
#endif


#ifdef __SIMPLIFY__
namespace std {
  smanip<int> setw( int parm ) {
    return smanip<int>( __setw, parm );
  }
}
#else
#pragma initialize 22; // just after the rest of the C++ library
namespace std {
  _WPRTLINK sapp<int> _HUGEDATA setw( __setw );
}
#endif