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
_thread_printf(int fd,const char * fmt,...)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
_thread_vprintf(int fd,const char * fmt,va_list ap)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
pchar(int fd,char c)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
pstr(int fd,const char * s)135 pstr(int fd, const char *s)
136 {
137
138 __sys_write(fd, s, strlen(s));
139 }
140
141