4.3BSD-Tahoe/usr/src/new/jove/io.h

/***************************************************************************
 * This program is Copyright (C) 1986, 1987, 1988 by Jonathan Payne.  JOVE *
 * is provided to you without charge, and with no warranty.  You may give  *
 * away copies of JOVE, including sources, provided that this notice is    *
 * included in all the files.                                              *
 ***************************************************************************/

#define putchar(c)	putc(c, stdout)
#define putc(c, fp)	(--(fp)->f_cnt >= 0 ? (*(fp)->f_ptr++ = (c)) : _flush((c), fp))
#define getc(fp)	(((--(fp)->f_cnt < 0) ? filbuf(fp) : *(fp)->f_ptr++))

typedef struct File {
	int	f_cnt,		/* number of characters left in buffer */
		f_bufsize,	/* size of what f_base points to */
		f_fd,		/* fildes */
		f_flags;	/* various flags */
	char	*f_ptr,		/* current offset */
		*f_base;	/* pointer to base */
	char	*f_name;	/* name of open file */
} File;

#define F_READ		01
#define F_WRITE		02
#define F_APPEND	04
#define F_MODE(x)	(x&07)
#define F_EOF		010
#define F_STRING	020
#define F_ERR		040
#define F_LOCKED	0100	/* don't close this file upon error */
#define F_MYBUF		0200	/* f_alloc allocated the buffer, so
				   f_close knows to free it up */
#define F_TELLALL	0400	/* whether to display info upon close */

extern long	io_chars;
extern int	io_lines;

extern File
	*stdout,

	*open_file(),
	*fd_open(),
	*f_open();

#ifdef VMUNIX
#   define MAXTTYBUF	2048
#else
#   define MAXTTYBUF	512
#endif