fwide.gml

开放源码的编译器open watcom 1.6.0版的源代码

.func fwide
#include <stdio.h>
#include <wchar.h>
int fwide( FILE *fp, int mode );
.funcend
.*
.desc begin
The &func function determines the orientation of the stream pointed
to by
.arg fp.
If
.arg mode
is greater than zero, the function first attempts to make the stream
wide oriented. If
.arg mode
is less than zero, the function first attempts to make the stream
byte oriented. Otherwise,
.arg mode
is zero and the &func function does not alter the orientation of the stream.
.desc end
.*
.return begin
The &func function returns a value greater than zero if, after the call, 
the stream has wide orientation, a value less than zero if the stream
has byte orientation, or zero if the stream has no orientation.
.return end
.*
.see begin
.seelist &function. fopen freopen
.see end
.*
.exmp begin
#include <stdio.h>
#include <wchar.h>

void main( void )
{
    FILE    *fp;
    int     mode;
.exmp break
    fp = fopen( "file", "r" );
    if( fp != NULL ) {
        mode = fwide( fp, -33 );
        printf( "orientation: %s\n",
            mode > 0 ? "wide" :
            mode < 0 ? "byte" : "none" );
    }
}
.exmp output
orientation: byte
.exmp end
.class ANSI
.system