usr/dash/output.h

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1997-2005
 *	Herbert Xu <herbert@gondor.apana.org.au>.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)output.h	8.2 (Berkeley) 5/4/95
 */

#ifndef OUTPUT_INCL

#include <stdarg.h>
#ifdef USE_GLIBC_STDIO
#include <stdio.h>
#endif
#include <sys/types.h>

struct output {
#ifdef USE_GLIBC_STDIO
	FILE *stream;
#endif
	char *nextc;
	char *end;
	char *buf;
	size_t bufsize;
	int fd;
	int flags;
};

extern struct output output;
extern struct output errout;
extern struct output preverrout;
#ifdef notyet
extern struct output memout;
#endif
extern struct output *out1;
extern struct output *out2;

void outstr(const char *, struct output *);
#ifndef USE_GLIBC_STDIO
void outcslow(int, struct output *);
#endif
void flushall(void);
void flushout(struct output *);
void outfmt(struct output *, const char *, ...)
    __attribute__((__format__(__printf__,2,3)));
void out1fmt(const char *, ...)
    __attribute__((__format__(__printf__,1,2)));
int fmtstr(char *, size_t, const char *, ...)
    __attribute__((__format__(__printf__,3,4)));
#ifndef USE_GLIBC_STDIO
void doformat(struct output *, const char *, va_list);
#endif
int xwrite(int, const void *, size_t);
#ifdef notyet
#ifdef USE_GLIBC_STDIO
void initstreams(void);
void openmemout(void);
int __closememout(void);
#endif
#endif

static inline void
freestdout()
{
	output.nextc = output.buf;
	output.flags = 0;
}

#define OUTPUT_ERR 01		/* error occurred on output */

#ifdef USE_GLIBC_STDIO
static inline void outc(int ch, struct output *file)
{
	putc(ch, file->stream);
}
#define doformat(d, f, a)	vfprintf((d)->stream, (f), (a))
#else
static inline void outc(int ch, struct output *file)
{
	if (file->nextc == file->end)
		outcslow(ch, file);
	else {
		*file->nextc = ch;
		file->nextc++;
	}
}
#endif
#define out1c(c)	outc((c), out1)
#define out2c(c)	outcslow((c), out2)
#define out1str(s)	outstr((s), out1)
#define out2str(s)	outstr((s), out2)
#define outerr(f)	(f)->flags

#define OUTPUT_INCL
#endif