mirror of
https://github.com/freebsd/freebsd-src
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151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2002 Jonathan Mini <mini@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <pthread.h>
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#include "libc_private.h"
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#include "thr_private.h"
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static void pchar(int fd, char c);
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static void pstr(int fd, const char *s);
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/*
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* Write formatted output to stdout, in a thread-safe manner.
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*
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* Recognises the following conversions:
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* %c -> char
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* %d -> signed int (base 10)
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* %s -> string
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* %u -> unsigned int (base 10)
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* %x -> unsigned int (base 16)
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* %p -> unsigned int (base 16)
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*/
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void
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_thread_printf(int fd, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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_thread_vprintf(fd, fmt, ap);
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va_end(ap);
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}
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void
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_thread_vprintf(int fd, const char *fmt, va_list ap)
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{
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static const char digits[16] = "0123456789abcdef";
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char buf[20];
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char *s;
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unsigned long r, u;
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int c;
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long d;
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int islong, isalt;
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while ((c = *fmt++)) {
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isalt = 0;
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islong = 0;
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if (c == '%') {
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next: c = *fmt++;
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if (c == '\0')
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return;
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switch (c) {
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case '#':
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isalt = 1;
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goto next;
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case 'c':
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pchar(fd, va_arg(ap, int));
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continue;
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case 's':
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pstr(fd, va_arg(ap, char *));
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continue;
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case 'l':
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islong = 1;
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goto next;
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case 'p':
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pstr(fd, "0x");
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islong = 1;
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/* FALLTHROUGH */
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case 'd':
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case 'u':
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case 'x':
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if (c == 'x' && isalt)
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pstr(fd, "0x");
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r = ((c == 'u') || (c == 'd')) ? 10 : 16;
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if (c == 'd') {
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if (islong)
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d = va_arg(ap, unsigned long);
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else
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d = va_arg(ap, unsigned);
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if (d < 0) {
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pchar(fd, '-');
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u = (unsigned long)(d * -1);
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} else
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u = (unsigned long)d;
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} else {
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if (islong)
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u = va_arg(ap, unsigned long);
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else
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u = va_arg(ap, unsigned);
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}
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s = buf;
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do {
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*s++ = digits[u % r];
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} while (u /= r);
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while (--s >= buf)
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pchar(fd, *s);
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continue;
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}
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}
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pchar(fd, c);
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}
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}
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/*
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* Write a single character to stdout, in a thread-safe manner.
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*/
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static void
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pchar(int fd, char c)
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{
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__sys_write(fd, &c, 1);
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}
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/*
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* Write a string to stdout, in a thread-safe manner.
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*/
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static void
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pstr(int fd, const char *s)
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{
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__sys_write(fd, s, strlen(s));
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}
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