1 /*- 2 * Copyright (c) 2002 Jonathan Mini <mini@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <sys/fcntl.h> 34 #include <sys/uio.h> 35 #include <errno.h> 36 #include <stdarg.h> 37 #include <unistd.h> 38 #include <pthread.h> 39 40 #include "thr_private.h" 41 42 static void pchar(int fd, char c); 43 static void pstr(int fd, const char *s); 44 45 /* 46 * Write formatted output to stdout, in a thread-safe manner. 47 * 48 * Recognises the following conversions: 49 * %c -> char 50 * %d -> signed int (base 10) 51 * %s -> string 52 * %u -> unsigned int (base 10) 53 * %x -> unsigned int (base 16) 54 * %p -> unsigned int (base 16) 55 */ 56 void 57 _thread_printf(int fd, const char *fmt, ...) 58 { 59 static const char digits[16] = "0123456789abcdef"; 60 va_list ap; 61 char buf[10]; 62 char *s; 63 unsigned r, u; 64 int c, d; 65 66 va_start(ap, fmt); 67 while ((c = *fmt++)) { 68 if (c == '%') { 69 c = *fmt++; 70 switch (c) { 71 case 'c': 72 pchar(fd, va_arg(ap, int)); 73 continue; 74 case 's': 75 pstr(fd, va_arg(ap, char *)); 76 continue; 77 case 'd': 78 case 'u': 79 case 'p': 80 case 'x': 81 r = ((c == 'u') || (c == 'd')) ? 10 : 16; 82 if (c == 'd') { 83 d = va_arg(ap, unsigned); 84 if (d < 0) { 85 pchar(fd, '-'); 86 u = (unsigned)(d * -1); 87 } else 88 u = (unsigned)d; 89 } else 90 u = va_arg(ap, unsigned); 91 s = buf; 92 do { 93 *s++ = digits[u % r]; 94 } while (u /= r); 95 while (--s >= buf) 96 pchar(fd, *s); 97 continue; 98 } 99 } 100 pchar(fd, c); 101 } 102 va_end(ap); 103 } 104 105 /* 106 * Write a single character to stdout, in a thread-safe manner. 107 */ 108 static void 109 pchar(int fd, char c) 110 { 111 112 write(fd, &c, 1); 113 } 114 115 /* 116 * Write a string to stdout, in a thread-safe manner. 117 */ 118 static void 119 pstr(int fd, const char *s) 120 { 121 122 write(fd, s, strlen(s)); 123 } 124 125