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- /* $NetBSD: printf.c,v 1.7 1996/02/08 20:19:36 gwr Exp $ */
-
- /*-
- * Copyright (c) 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)printf.c 8.1 (Berkeley) 6/11/93
- */
-
- /*
- * Scaled down version of printf(3).
- *
- * One additional format:
- *
- * The format %b is supported to decode error registers.
- * Its usage is:
- *
- * printf("reg=%b\n", regval, "<base><arg>*");
- *
- * where <base> is the output base expressed as a control character, e.g.
- * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
- * the first of which gives the bit number to be inspected (origin 1), and
- * the next characters (up to a control character, i.e. a character <= 32),
- * give the name of the register. Thus:
- *
- * printf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
- *
- * would produce output:
- *
- * reg=3<BITTWO,BITONE>
- */
-
- #ifdef __STDC__
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
-
- #include "stand.h"
-
- static void kprintn (void (*)(), u_long, int);
- static void sputchar (int);
- static void kprintf (void (*)(), const char *, va_list);
-
- static char *sbuf;
-
- static void
- sputchar(c)
- int c;
- {
- *sbuf++ = c;
- }
-
- void
- #ifdef __STDC__
- sprintf(char *buf, const char *fmt, ...)
- #else
- sprintf(buf, fmt, va_alist)
- char *buf, *fmt;
- #endif
- {
- va_list ap;
-
- sbuf = buf;
- #ifdef __STDC__
- va_start(ap, fmt);
- #else
- va_start(ap);
- #endif
- kprintf(sputchar, fmt, ap);
- va_end(ap);
- *sbuf = '\0';
- }
-
- void
- #ifdef __STDC__
- printf(const char *fmt, ...)
- #else
- printf(fmt, va_alist)
- char *fmt;
- #endif
- {
- va_list ap;
-
- #ifdef __STDC__
- va_start(ap, fmt);
- #else
- va_start(ap);
- #endif
- kprintf(putchar, fmt, ap);
- va_end(ap);
- }
-
- void
- vprintf(const char *fmt, va_list ap)
- {
- kprintf(putchar, fmt, ap);
- }
-
- void
- kprintf(put, fmt, ap)
- void (*put)(int);
- const char *fmt;
- va_list ap;
- {
- register char *p;
- register int ch, n;
- unsigned long ul;
- int lflag, set;
- int zflag;
- int width;
-
- for (;;) {
- while ((ch = *fmt++) != '%') {
- if (ch == '\0')
- return;
- put(ch);
- }
- lflag = 0;
- zflag = 0;
- width = 0;
- reswitch: switch (ch = *fmt++) {
- case 'l':
- lflag = 1;
- goto reswitch;
- case 'b':
- ul = va_arg(ap, int);
- p = va_arg(ap, char *);
- kprintn(put, ul, *p++);
-
- if (!ul)
- break;
-
- for (set = 0; (n = *p++);) {
- if (ul & (1 << (n - 1))) {
- put(set ? ',' : '<');
- for (; (n = *p) > ' '; ++p)
- put(n);
- set = 1;
- } else
- for (; *p > ' '; ++p);
- }
- if (set)
- put('>');
- break;
- case 'c':
- ch = va_arg(ap, int);
- put(ch & 0x7f);
- break;
- case 's':
- p = va_arg(ap, char *);
- while ((ch = *p++))
- put(ch);
- break;
- case 'd':
- ul = lflag ?
- va_arg(ap, long) : va_arg(ap, int);
- if ((long)ul < 0) {
- put('-');
- ul = -(long)ul;
- }
- kprintn(put, ul, 10);
- break;
- case 'o':
- ul = lflag ?
- va_arg(ap, u_long) : va_arg(ap, u_int);
- kprintn(put, ul, 8);
- break;
- case 'u':
- ul = lflag ?
- va_arg(ap, u_long) : va_arg(ap, u_int);
- kprintn(put, ul, 10);
- break;
- case 'x':
- ul = lflag ?
- va_arg(ap, u_long) : va_arg(ap, u_int);
- if (width > 0) {
- unsigned long tmp = ul;
- do {
- --width;
- tmp = tmp >> 4;
- } while (tmp > 0);
- while (width > 0) {
- --width;
- put(zflag ? '0' : ' ');
- }
- }
- kprintn(put, ul, 16);
- break;
- default:
- if (isdigit(ch)) {
- if (ch == '0' && width == 0)
- zflag = 1;
- else
- width = (width * 10) + (ch - '0');
- goto reswitch;
- } else {
- put('%');
- if (lflag)
- put('l');
- put(ch);
- }
- }
- }
- va_end(ap);
- }
-
- static void
- kprintn(put, ul, base)
- void (*put)(int);
- unsigned long ul;
- int base;
- {
- /* hold a long in base 8 */
- char *p, buf[(sizeof(long) * NBBY / 3) + 1];
-
- p = buf;
- do {
- *p++ = "0123456789abcdef"[ul % base];
- } while (ul /= base);
- do {
- put(*--p);
- } while (p > buf);
- }
-
- void
- twiddle()
- {
- static int pos;
-
- putchar("|/-\\"[pos++ & 3]);
- putchar('\b');
- }
-