1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002 Jonathan Mini <[email protected]>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <stdarg.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <pthread.h>
36
37 #include "libc_private.h"
38 #include "thr_private.h"
39
40 static void pchar(int fd, char c);
41 static void pstr(int fd, const char *s);
42
43 /*
44 * Write formatted output to stdout, in a thread-safe manner.
45 *
46 * Recognises the following conversions:
47 * %c -> char
48 * %d -> signed int (base 10)
49 * %s -> string
50 * %u -> unsigned int (base 10)
51 * %x -> unsigned int (base 16)
52 * %p -> unsigned int (base 16)
53 */
54 void
_thread_printf(int fd,const char * fmt,...)55 _thread_printf(int fd, const char *fmt, ...)
56 {
57 va_list ap;
58
59 va_start(ap, fmt);
60 _thread_vprintf(fd, fmt, ap);
61 va_end(ap);
62 }
63
64 void
_thread_vprintf(int fd,const char * fmt,va_list ap)65 _thread_vprintf(int fd, const char *fmt, va_list ap)
66 {
67 static const char digits[16] = "0123456789abcdef";
68 char buf[20];
69 char *s;
70 unsigned long r, u;
71 int c;
72 long d;
73 int islong, isalt;
74
75 while ((c = *fmt++)) {
76 isalt = 0;
77 islong = 0;
78 if (c == '%') {
79 next: c = *fmt++;
80 if (c == '\0')
81 return;
82 switch (c) {
83 case '#':
84 isalt = 1;
85 goto next;
86 case 'c':
87 pchar(fd, va_arg(ap, int));
88 continue;
89 case 's':
90 pstr(fd, va_arg(ap, char *));
91 continue;
92 case 'l':
93 islong = 1;
94 goto next;
95 case 'p':
96 pstr(fd, "0x");
97 islong = 1;
98 /* FALLTHROUGH */
99 case 'd':
100 case 'u':
101 case 'x':
102 if (c == 'x' && isalt)
103 pstr(fd, "0x");
104 r = ((c == 'u') || (c == 'd')) ? 10 : 16;
105 if (c == 'd') {
106 if (islong)
107 d = va_arg(ap, unsigned long);
108 else
109 d = va_arg(ap, unsigned);
110 if (d < 0) {
111 pchar(fd, '-');
112 u = (unsigned long)(d * -1);
113 } else
114 u = (unsigned long)d;
115 } else {
116 if (islong)
117 u = va_arg(ap, unsigned long);
118 else
119 u = va_arg(ap, unsigned);
120 }
121 s = buf;
122 do {
123 *s++ = digits[u % r];
124 } while (u /= r);
125 while (--s >= buf)
126 pchar(fd, *s);
127 continue;
128 }
129 }
130 pchar(fd, c);
131 }
132 }
133
134 /*
135 * Write a single character to stdout, in a thread-safe manner.
136 */
137 static void
pchar(int fd,char c)138 pchar(int fd, char c)
139 {
140
141 __sys_write(fd, &c, 1);
142 }
143
144 /*
145 * Write a string to stdout, in a thread-safe manner.
146 */
147 static void
pstr(int fd,const char * s)148 pstr(int fd, const char *s)
149 {
150
151 __sys_write(fd, s, strlen(s));
152 }
153
154