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/*
* Mach Operating System
* Copyright (c) 1993-1989 Carnegie Mellon University.
* Copyright (c) 1994 The University of Utah and
* the Computer Systems Laboratory (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON, THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF
* THIS SOFTWARE IN ITS "AS IS" CONDITION, AND DISCLAIM ANY LIABILITY
* OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF
* THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <stdio.h>
#include <stdarg.h>
#include <syscall.h>
#include "doprnt.h"
/* This version of printf is implemented in terms of putchar and puts. */
#define PRINTF_BUFMAX 128
struct printf_state {
char buf[PRINTF_BUFMAX];
unsigned int index;
};
static void
flush(struct printf_state *state)
{
print(state->index, state->buf);
state->index = 0;
}
static void
printf_char(char *arg, int c)
{
struct printf_state *state = (struct printf_state *) arg;
if (state->index >= PRINTF_BUFMAX) {
flush(state);
}
state->buf[state->index] = c;
state->index++;
if (c == '\n') {
flush(state);
}
}
/*
* Printing (to console)
*/
int vprintf(const char *fmt, va_list args)
{
struct printf_state state;
state.index = 0;
_doprnt(fmt, args, 0, (void (*)())printf_char, (char *) &state);
if (state.index != 0)
flush(&state);
/* _doprnt currently doesn't pass back error codes,
so just assume nothing bad happened. */
return 0;
}
int
printf(const char *fmt, ...)
{
va_list args;
int err;
va_start(args, fmt);
err = vprintf(fmt, args);
va_end(args);
return err;
}
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