2 * Copyright (c) 1986, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
39 * $FreeBSD: src/lib/libstand/printf.c,v 1.4 1999/12/27 08:45:14 peter Exp $
40 * $DragonFly: src/lib/libstand/printf.c,v 1.6 2005/12/11 02:27:26 swildner Exp $
44 * Standaloneified version of the FreeBSD kernel printf family.
47 #include <sys/types.h>
52 * Note that stdarg.h and the ANSI style va_start macro is used for both
53 * ANSI and traditional C compilers.
62 static char *ksprintn(u_long, int, int *);
63 static int kvprintf(const char *, void (*)(int, void *), void *, int,
65 static void putchar_wrapper(int, void *);
66 static void snprintf_func(int, void *);
69 putchar_wrapper(int ch, void *arg __unused)
75 printf(const char *fmt, ...)
81 retval = kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
87 vprintf(const char *fmt, va_list ap)
90 kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
94 sprintf(char *buf, const char *cfmt, ...)
100 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
107 vsprintf(char *buf, const char *cfmt, va_list ap)
111 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
116 snprintf(char *buf, size_t size, const char *cfmt, ...)
122 retval = vsnprintf(buf, size, cfmt, ap);
128 vsnprintf(char *buf, size_t size, const char *cfmt, va_list ap)
130 struct snprintf_arg info;
135 retval = kvprintf(cfmt, snprintf_func, &info, 10, ap);
136 if (info.remain >= 1)
142 snprintf_func(int ch, void *arg)
144 struct snprintf_arg * const info = arg;
146 if (info->remain >= 2) {
153 * Put a number (base <= 16) in a buffer in reverse order; return an
154 * optional length and a pointer to the NULL terminated (preceded?)
158 ksprintn(u_long ul, int base, int *lenp)
159 { /* A long in base 8, plus NULL. */
160 static char buf[sizeof(long) * NBBY / 3 + 2];
165 *++p = hex2ascii(ul % base);
166 } while (ul /= base);
173 * Scaled down version of printf(3).
175 * Two additional formats:
177 * The format %b is supported to decode error registers.
180 * printf("reg=%b\n", regval, "<base><arg>*");
182 * where <base> is the output base expressed as a control character, e.g.
183 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
184 * the first of which gives the bit number to be inspected (origin 1), and
185 * the next characters (up to a control character, i.e. a character <= 32),
186 * give the name of the register. Thus:
188 * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
190 * would produce output:
192 * reg=3<BITTWO,BITONE>
194 * XXX: %D -- Hexdump, takes pointer and separator string:
195 * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
196 * ("%*D", len, ptr, " " -> XX XX XX XX ...
199 kvprintf(char const *fmt, void (*func)(int, void *), void *arg, int radix,
202 #define PCHAR(c) {int cc=(c); if (func) (*func)(cc, arg); else *d++ = cc; retval++; }
207 int base, lflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
218 fmt = "(fmt null)\n";
220 if (radix < 2 || radix > 36)
226 while ((ch = (u_char)*fmt++) != '%') {
231 lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
232 sign = 0; dot = 0; dwidth = 0;
233 reswitch: switch (ch = (u_char)*fmt++) {
251 width = va_arg(ap, int);
257 dwidth = va_arg(ap, int);
265 case '1': case '2': case '3': case '4':
266 case '5': case '6': case '7': case '8': case '9':
267 for (n = 0;; ++fmt) {
268 n = n * 10 + ch - '0';
270 if (ch < '0' || ch > '9')
279 ul = va_arg(ap, int);
280 p = va_arg(ap, char *);
281 for (q = ksprintn(ul, *p++, NULL); *q;)
289 if (ul & (1 << (n - 1))) {
290 PCHAR(tmp ? ',' : '<');
291 for (; (n = *p) > ' '; ++p)
295 for (; *p > ' '; ++p)
302 PCHAR(va_arg(ap, int));
305 up = va_arg(ap, u_char *);
306 p = va_arg(ap, char *);
310 PCHAR(hex2ascii(*up >> 4));
311 PCHAR(hex2ascii(*up & 0x0f));
319 ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
327 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
331 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
335 ul = (u_long)va_arg(ap, void *);
340 p = va_arg(ap, char *);
346 for (n = 0; n < dwidth && p[n]; n++)
351 if (!ladjust && width > 0)
356 if (ladjust && width > 0)
361 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
365 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
367 number: if (sign && (long)ul < 0L) {
371 p = ksprintn(ul, base, &tmp);
372 if (sharpflag && ul != 0) {
381 if (!ladjust && width && (width -= tmp) > 0)
386 if (sharpflag && ul != 0) {
389 } else if (base == 16) {
398 if (ladjust && width && (width -= tmp) > 0)