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 <stdarg.h> 28 #include <string.h> 29 #include <unistd.h> 30 #include <pthread.h> 31 32 #include "thr_private.h" 33 34 static void pchar(int fd, char c); 35 static void pstr(int fd, const char *s); 36 37 /* 38 * Write formatted output to stdout, in a thread-safe manner. 39 * 40 * Recognises the following conversions: 41 * %c -> char 42 * %d -> signed int (base 10) 43 * %s -> string 44 * %u -> unsigned int (base 10) 45 * %x -> unsigned int (base 16) 46 * %p -> unsigned int (base 16) 47 */ 48 void 49 _thread_printf(int fd, const char *fmt, ...) 50 { 51 va_list ap; 52 53 va_start(ap, fmt); 54 _thread_vprintf(fd, fmt, ap); 55 va_end(ap); 56 } 57 58 void 59 _thread_vprintf(int fd, const char *fmt, va_list ap) 60 { 61 static const char digits[16] = "0123456789abcdef"; 62 char buf[20]; 63 char *s; 64 unsigned long r, u; 65 int c; 66 long d; 67 int islong; 68 69 while ((c = *fmt++)) { 70 islong = 0; 71 if (c == '%') { 72 next: c = *fmt++; 73 if (c == '\0') 74 return; 75 switch (c) { 76 case 'c': 77 pchar(fd, va_arg(ap, int)); 78 continue; 79 case 's': 80 pstr(fd, va_arg(ap, char *)); 81 continue; 82 case 'l': 83 islong = 1; 84 goto next; 85 case 'p': 86 islong = 1; 87 /* FALLTHROUGH */ 88 case 'd': 89 case 'u': 90 case 'x': 91 r = ((c == 'u') || (c == 'd')) ? 10 : 16; 92 if (c == 'd') { 93 if (islong) 94 d = va_arg(ap, unsigned long); 95 else 96 d = va_arg(ap, unsigned); 97 if (d < 0) { 98 pchar(fd, '-'); 99 u = (unsigned long)(d * -1); 100 } else 101 u = (unsigned long)d; 102 } else { 103 if (islong) 104 u = va_arg(ap, unsigned long); 105 else 106 u = va_arg(ap, unsigned); 107 } 108 s = buf; 109 do { 110 *s++ = digits[u % r]; 111 } while (u /= r); 112 while (--s >= buf) 113 pchar(fd, *s); 114 continue; 115 } 116 } 117 pchar(fd, c); 118 } 119 } 120 121 /* 122 * Write a single character to stdout, in a thread-safe manner. 123 */ 124 static void 125 pchar(int fd, char c) 126 { 127 128 __sys_write(fd, &c, 1); 129 } 130 131 /* 132 * Write a string to stdout, in a thread-safe manner. 133 */ 134 static void 135 pstr(int fd, const char *s) 136 { 137 138 __sys_write(fd, s, strlen(s)); 139 } 140 141