eof.gml

开放源码的编译器open watcom 1.6.0版的源代码

.func eof
#include <&iohdr>
int eof( int &fd );
.ixfunc2 '&OsIo' &func
.funcend
.desc begin
The &func function determines, at the operating system level, if the
end of the file has been reached for the file whose file &handle is
given by
.arg &fd..
Because the current file position is set following an input operation,
the &func function may be called to detect the end of the file before
an input operation beyond the end of the file is attempted.
.desc end
.return begin
The &func function returns 1 if the current file position is at the
end of the file, 0 if the current file position is not at the end.
A return value of &minus.1 indicates an error, and in this case
.kw errno
is set to indicate the error.
.return end
.error begin
.begterm 12
.term EBADF
The
.arg &fd
argument is not a valid file &handle..
.endterm
.error end
.see begin
.seelist eof read
.see end
.exmp begin
#include <stdio.h>
#include <fcntl.h>
#include <&iohdr>

void main()
  {
    int &fd, len;
    char buffer[100];
.exmp break
    &fd = open( "file", O_RDONLY );
    if( &fd != -1 ) {
      while( ! eof( &fd ) ) {
        len = read( &fd, buffer, sizeof(buffer) - 1 );
        buffer[ len ] = '\0';
        printf( "%s", buffer );
      }
      close( &fd );
    }
  }
.exmp end
.class WATCOM
.system