xfmax1.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 70 行

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//
// XFMAX1       : max function for REAL argumemts
//

#include <stdarg.h>

#include "ftnstd.h"
#include "ifenv.h"

#if defined( __AXP__ ) || defined( __PPC__ )
  #define VAR_SINGLE    double          // required because according to ansi
                                        // we cannot pass singles using varargs
#else
  #define VAR_SINGLE    single
#endif

intstar4 XMAX1( int num_args, ... ) {
//===================================

// Return max( arg1, arg2,... ).

    single      max;
    single      arg;
    int         i;
    va_list     args;

    va_start( args, num_args );
    max = va_arg( args, VAR_SINGLE );
    for( i = 1; i < num_args; i++ ) {
        arg = va_arg( args, VAR_SINGLE );
        if( max < arg ) {
            max = arg;
        }
    }
    va_end( args );
    return( max );
}