2 * Copyright (c) 2002 Jonathan Mini <mini@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $DragonFly: src/lib/libthread_xu/thread/thr_printf.c,v 1.1 2005/02/01 12:38:27 davidxu Exp $
29 #include <sys/cdefs.h>
35 #include "thr_private.h"
37 static void pchar(int fd, char c);
38 static void pstr(int fd, const char *s);
41 * Write formatted output to stdout, in a thread-safe manner.
43 * Recognises the following conversions:
45 * %d -> signed int (base 10)
47 * %u -> unsigned int (base 10)
48 * %x -> unsigned int (base 16)
49 * %p -> unsigned int (base 16)
52 _thread_printf(int fd, const char *fmt, ...)
54 static const char digits[16] = "0123456789abcdef";
64 while ((c = *fmt++)) {
72 pchar(fd, va_arg(ap, int));
75 pstr(fd, va_arg(ap, char *));
85 r = ((c == 'u') || (c == 'd')) ? 10 : 16;
88 d = va_arg(ap, unsigned long);
90 d = va_arg(ap, unsigned);
93 u = (unsigned long)(d * -1);
98 u = va_arg(ap, unsigned long);
100 u = va_arg(ap, unsigned);
104 *s++ = digits[u % r];
118 * Write a single character to stdout, in a thread-safe manner.
121 pchar(int fd, char c)
124 __sys_write(fd, &c, 1);
128 * Write a string to stdout, in a thread-safe manner.
131 pstr(int fd, const char *s)
134 __sys_write(fd, s, strlen(s));