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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/fcntl.h> 32 #include <sys/uio.h> 33 #include <errno.h> 34 #include <stdarg.h> 35 #include <string.h> 36 #include <unistd.h> 37 #include <pthread.h> 38 39 #include "thr_private.h" 40 41 static void pchar(int fd, char c); 42 static void pstr(int fd, const char *s); 43 44 /* 45 * Write formatted output to stdout, in a thread-safe manner. 46 * 47 * Recognises the following conversions: 48 * %c -> char 49 * %d -> signed int (base 10) 50 * %s -> string 51 * %u -> unsigned int (base 10) 52 * %x -> unsigned int (base 16) 53 * %p -> unsigned int (base 16) 54 */ 55 void 56 _thread_printf(int fd, const char *fmt, ...) 57 { 58 static const char digits[16] = "0123456789abcdef"; 59 va_list ap; 60 char buf[10]; 61 char *s; 62 unsigned r, u; 63 int c, d; 64 65 va_start(ap, fmt); 66 while ((c = *fmt++)) { 67 if (c == '%') { 68 c = *fmt++; 69 switch (c) { 70 case 'c': 71 pchar(fd, va_arg(ap, int)); 72 continue; 73 case 's': 74 pstr(fd, va_arg(ap, char *)); 75 continue; 76 case 'd': 77 case 'u': 78 case 'p': 79 case 'x': 80 r = ((c == 'u') || (c == 'd')) ? 10 : 16; 81 if (c == 'd') { 82 d = va_arg(ap, unsigned); 83 if (d < 0) { 84 pchar(fd, '-'); 85 u = (unsigned)(d * -1); 86 } else 87 u = (unsigned)d; 88 } else 89 u = va_arg(ap, unsigned); 90 s = buf; 91 do { 92 *s++ = digits[u % r]; 93 } while (u /= r); 94 while (--s >= buf) 95 pchar(fd, *s); 96 continue; 97 } 98 } 99 pchar(fd, c); 100 } 101 va_end(ap); 102 } 103 104 /* 105 * Write a single character to stdout, in a thread-safe manner. 106 */ 107 static void 108 pchar(int fd, char c) 109 { 110 111 __sys_write(fd, &c, 1); 112 } 113 114 /* 115 * Write a string to stdout, in a thread-safe manner. 116 */ 117 static void 118 pstr(int fd, const char *s) 119 { 120 121 __sys_write(fd, s, strlen(s)); 122 } 123 124