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/*-
* Copyright (c) 2002 Jonathan Mini <mini@freebsd.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include "thr_private.h"
static void pchar(int fd, char c);
static void pstr(int fd, const char *s);
/*
* Write formatted output to stdout, in a thread-safe manner.
*
* Recognises the following conversions:
* %c -> char
* %d -> signed int (base 10)
* %s -> string
* %u -> unsigned int (base 10)
* %x -> unsigned int (base 16)
* %p -> unsigned int (base 16)
*/
void
_thread_printf(int fd, const char *fmt, ...)
{
static const char digits[16] = "0123456789abcdef";
va_list ap;
char buf[20];
char *s;
unsigned long r, u;
int c;
long d;
int islong;
va_start(ap, fmt);
while ((c = *fmt++)) {
islong = 0;
if (c == '%') {
next: c = *fmt++;
if (c == '\0')
goto out;
switch (c) {
case 'c':
pchar(fd, va_arg(ap, int));
continue;
case 's':
pstr(fd, va_arg(ap, char *));
continue;
case 'l':
islong = 1;
goto next;
case 'p':
islong = 1;
case 'd':
case 'u':
case 'x':
r = ((c == 'u') || (c == 'd')) ? 10 : 16;
if (c == 'd') {
if (islong)
d = va_arg(ap, unsigned long);
else
d = va_arg(ap, unsigned);
if (d < 0) {
pchar(fd, '-');
u = (unsigned long)(d * -1);
} else
u = (unsigned long)d;
} else {
if (islong)
u = va_arg(ap, unsigned long);
else
u = va_arg(ap, unsigned);
}
s = buf;
do {
*s++ = digits[u % r];
} while (u /= r);
while (--s >= buf)
pchar(fd, *s);
continue;
}
}
pchar(fd, c);
}
out:
va_end(ap);
}
/*
* Write a single character to stdout, in a thread-safe manner.
*/
static void
pchar(int fd, char c)
{
__sys_write(fd, &c, 1);
}
/*
* Write a string to stdout, in a thread-safe manner.
*/
static void
pstr(int fd, const char *s)
{
__sys_write(fd, s, strlen(s));
}
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