thr_printf.c revision 301135
1122687Sbms/*- 2122687Sbms * Copyright (c) 2002 Jonathan Mini <mini@freebsd.org> 3122687Sbms * All rights reserved. 4122687Sbms * 5122687Sbms * Redistribution and use in source and binary forms, with or without 6122687Sbms * modification, are permitted provided that the following conditions 7122687Sbms * are met: 8122687Sbms * 1. Redistributions of source code must retain the above copyright 9122687Sbms * notice, this list of conditions and the following disclaimer. 10122687Sbms * 2. Redistributions in binary form must reproduce the above copyright 11122687Sbms * notice, this list of conditions and the following disclaimer in the 12122687Sbms * documentation and/or other materials provided with the distribution. 13122687Sbms * 14251475Semaste * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15251475Semaste * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16251475Semaste * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17251475Semaste * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18251475Semaste * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19251475Semaste * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20251475Semaste * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21251475Semaste * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22251475Semaste * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23251475Semaste * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24251475Semaste * SUCH DAMAGE. 25122687Sbms */ 26122687Sbms 27122687Sbms#include <sys/cdefs.h> 28122687Sbms__FBSDID("$FreeBSD: head/lib/libthr/thread/thr_printf.c 301135 2016-06-01 16:11:09Z cem $"); 29122687Sbms 30122687Sbms#include <stdarg.h> 31122687Sbms#include <string.h> 32122687Sbms#include <unistd.h> 33122687Sbms#include <pthread.h> 34122687Sbms 35122687Sbms#include "libc_private.h" 36122687Sbms#include "thr_private.h" 37122687Sbms 38122687Sbmsstatic void pchar(int fd, char c); 39122687Sbmsstatic void pstr(int fd, const char *s); 40122687Sbms 41122687Sbms/* 42122687Sbms * Write formatted output to stdout, in a thread-safe manner. 43122687Sbms * 44122687Sbms * Recognises the following conversions: 45122687Sbms * %c -> char 46122687Sbms * %d -> signed int (base 10) 47122687Sbms * %s -> string 48122687Sbms * %u -> unsigned int (base 10) 49122687Sbms * %x -> unsigned int (base 16) 50122687Sbms * %p -> unsigned int (base 16) 51122687Sbms */ 52122687Sbmsvoid 53122687Sbms_thread_printf(int fd, const char *fmt, ...) 54122687Sbms{ 55122687Sbms va_list ap; 56122687Sbms 57122687Sbms va_start(ap, fmt); 58122687Sbms _thread_vprintf(fd, fmt, ap); 59122687Sbms va_end(ap); 60122687Sbms} 61122687Sbms 62122687Sbmsvoid 63122687Sbms_thread_vprintf(int fd, const char *fmt, va_list ap) 64122687Sbms{ 65122687Sbms static const char digits[16] = "0123456789abcdef"; 66122687Sbms char buf[20]; 67122687Sbms char *s; 68122687Sbms unsigned long r, u; 69122687Sbms int c; 70122687Sbms long d; 71122687Sbms int islong, isalt; 72122687Sbms 73122687Sbms while ((c = *fmt++)) { 74122687Sbms isalt = 0; 75122687Sbms islong = 0; 76122687Sbms if (c == '%') { 77122687Sbmsnext: c = *fmt++; 78122687Sbms if (c == '\0') 79122687Sbms return; 80122687Sbms switch (c) { 81122687Sbms case '#': 82122687Sbms isalt = 1; 83122687Sbms goto next; 84122687Sbms case 'c': 85122687Sbms pchar(fd, va_arg(ap, int)); 86122687Sbms continue; 87122687Sbms case 's': 88122687Sbms pstr(fd, va_arg(ap, char *)); 89122687Sbms continue; 90122687Sbms case 'l': 91122687Sbms islong = 1; 92122687Sbms goto next; 93122687Sbms case 'p': 94122687Sbms pstr(fd, "0x"); 95122687Sbms islong = 1; 96122687Sbms case 'd': 97122687Sbms case 'u': 98122687Sbms case 'x': 99122687Sbms if (c == 'x' && isalt) 100122687Sbms pstr(fd, "0x"); 101122687Sbms r = ((c == 'u') || (c == 'd')) ? 10 : 16; 102122687Sbms if (c == 'd') { 103122687Sbms if (islong) 104122687Sbms d = va_arg(ap, unsigned long); 105122687Sbms else 106122687Sbms d = va_arg(ap, unsigned); 107122687Sbms if (d < 0) { 108122687Sbms pchar(fd, '-'); 109122687Sbms u = (unsigned long)(d * -1); 110122687Sbms } else 111122687Sbms u = (unsigned long)d; 112122687Sbms } else { 113122687Sbms if (islong) 114122687Sbms u = va_arg(ap, unsigned long); 115122687Sbms else 116122687Sbms u = va_arg(ap, unsigned); 117122687Sbms } 118122687Sbms s = buf; 119122687Sbms do { 120122687Sbms *s++ = digits[u % r]; 121122687Sbms } while (u /= r); 122122687Sbms while (--s >= buf) 123122687Sbms pchar(fd, *s); 124122687Sbms continue; 125122687Sbms } 126122687Sbms } 127122687Sbms pchar(fd, c); 128122687Sbms } 129122687Sbms} 130122687Sbms 131122687Sbms/* 132122687Sbms * Write a single character to stdout, in a thread-safe manner. 133122687Sbms */ 134122687Sbmsstatic void 135122687Sbmspchar(int fd, char c) 136122687Sbms{ 137122687Sbms 138122687Sbms __sys_write(fd, &c, 1); 139122687Sbms} 140122687Sbms 141122687Sbms/* 142122687Sbms * Write a string to stdout, in a thread-safe manner. 143122687Sbms */ 144122687Sbmsstatic void 145122687Sbmspstr(int fd, const char *s) 146122687Sbms{ 147122687Sbms 148122687Sbms __sys_write(fd, s, strlen(s)); 149122687Sbms} 150122687Sbms 151122687Sbms