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 <stdarg.h> 30 #include <string.h> 31 #include <unistd.h> 32 #include <pthread.h> 33 34 #include "thr_private.h" 35 36 static void pchar(int fd, char c); 37 static void pstr(int fd, const char *s); 38 39 /* 40 * Write formatted output to stdout, in a thread-safe manner. 41 * 42 * Recognises the following conversions: 43 * %c -> char 44 * %d -> signed int (base 10) 45 * %s -> string 46 * %u -> unsigned int (base 10) 47 * %x -> unsigned int (base 16) 48 * %p -> unsigned int (base 16) 49 */ 50 void 51 _thread_printf(int fd, const char *fmt, ...) 52 { 53 static const char digits[16] = "0123456789abcdef"; 54 va_list ap; 55 char buf[20]; 56 char *s; 57 unsigned long r, u; 58 int c; 59 long d; 60 int islong; 61 62 va_start(ap, fmt); 63 while ((c = *fmt++)) { 64 islong = 0; 65 if (c == '%') { 66 next: c = *fmt++; 67 if (c == '\0') 68 goto out; 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 'l': 77 islong = 1; 78 goto next; 79 case 'p': 80 islong = 1; 81 case 'd': 82 case 'u': 83 case 'x': 84 r = ((c == 'u') || (c == 'd')) ? 10 : 16; 85 if (c == 'd') { 86 if (islong) 87 d = va_arg(ap, unsigned long); 88 else 89 d = va_arg(ap, unsigned); 90 if (d < 0) { 91 pchar(fd, '-'); 92 u = (unsigned long)(d * -1); 93 } else 94 u = (unsigned long)d; 95 } else { 96 if (islong) 97 u = va_arg(ap, unsigned long); 98 else 99 u = va_arg(ap, unsigned); 100 } 101 s = buf; 102 do { 103 *s++ = digits[u % r]; 104 } while (u /= r); 105 while (--s >= buf) 106 pchar(fd, *s); 107 continue; 108 } 109 } 110 pchar(fd, c); 111 } 112 out: 113 va_end(ap); 114 } 115 116 /* 117 * Write a single character to stdout, in a thread-safe manner. 118 */ 119 static void 120 pchar(int fd, char c) 121 { 122 123 __sys_write(fd, &c, 1); 124 } 125 126 /* 127 * Write a string to stdout, in a thread-safe manner. 128 */ 129 static void 130 pstr(int fd, const char *s) 131 { 132 133 __sys_write(fd, s, strlen(s)); 134 } 135 136