[unix-history] / sys / stand / printf.c

/*-
 * Copyright (c) 1991 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.
 *
 *	from: @(#)printf.c	5.6 (Berkeley) 5/25/91
 *	$Id$
 */

/*
 * 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>
 */

#include <sys/cdefs.h>
#include <sys/types.h>

/*
 * Note that stdarg.h and the ANSI style va_start macro is used for both
 * ANSI and traditional C compilers.
 */
#define KERNEL
#include <machine/stdarg.h>
#undef KERNEL

static void kprintn __P((u_long, int));

void
#if __STDC__
printf(const char *fmt, ...)
#else
printf(fmt /* , va_alist */)
	char *fmt;
#endif
{
	register char *p;
	register int ch, n;
	unsigned long ul;
	int lflag, set;
	va_list ap;

	va_start(ap, fmt);
	for (;;) {
		while ((ch = *fmt++) != '%') {
			if (ch == '\0')
				return;
			putchar(ch);
		}
		lflag = 0;
reswitch:	switch (ch = *fmt++) {
		case 'l':
			lflag = 1;
			goto reswitch;
		case 'b':
			ul = va_arg(ap, int);
			p = va_arg(ap, char *);
			kprintn(ul, *p++);

			if (!ul)
				break;

			for (set = 0; n = *p++;) {
				if (ul & (1 << (n - 1))) {
					putchar(set ? ',' : '<');
					for (; (n = *p) > ' '; ++p)
						putchar(n);
					set = 1;
				} else
					for (; *p > ' '; ++p);
			}
			if (set)
				putchar('>');
			break;
		case 'c':
			ch = va_arg(ap, int);
				putchar(ch & 0x7f);
			break;
		case 's':
			p = va_arg(ap, char *);
			while (ch = *p++)
				putchar(ch);
			break;
		case 'd':
			ul = lflag ?
			    va_arg(ap, long) : va_arg(ap, int);
			if ((long)ul < 0) {
				putchar('-');
				ul = -(long)ul;
			}
			kprintn(ul, 10);
			break;
		case 'o':
			ul = lflag ?
			    va_arg(ap, u_long) : va_arg(ap, u_int);
			kprintn(ul, 8);
			break;
		case 'u':
			ul = lflag ?
			    va_arg(ap, u_long) : va_arg(ap, u_int);
			kprintn(ul, 10);
			break;
		case 'x':
			ul = lflag ?
			    va_arg(ap, u_long) : va_arg(ap, u_int);
			kprintn(ul, 16);
			break;
		default:
			putchar('%');
			if (lflag)
				putchar('l');
			putchar(ch);
		}
	}
	va_end(ap);
}

static void
kprintn(ul, base)
	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 {
		putchar(*--p);
	} while (p > buf);
}
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1991 The Regents of the University of California.
	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	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
78ed81a3	33	* from: @(#)printf.c 5.6 (Berkeley) 5/25/91
78ed81a3	34	* $Id$
15637ed4 RG	35	*/
	36
	37	/*
	38	* Scaled down version of printf(3).
	39	*
	40	* One additional format:
	41	*
	42	* The format %b is supported to decode error registers.
	43	* Its usage is:
	44	*
	45	* printf("reg=%b\n", regval, "<base><arg>*");
	46	*
	47	* where <base> is the output base expressed as a control character, e.g.
	48	* \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
	49	* the first of which gives the bit number to be inspected (origin 1), and
	50	* the next characters (up to a control character, i.e. a character <= 32),
	51	* give the name of the register. Thus:
	52	*
	53	* printf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
	54	*
	55	* would produce output:
	56	*
	57	* reg=3<BITTWO,BITONE>
	58	*/
	59
	60	#include <sys/cdefs.h>
	61	#include <sys/types.h>
	62
	63	/*
	64	* Note that stdarg.h and the ANSI style va_start macro is used for both
	65	* ANSI and traditional C compilers.
	66	*/
	67	#define KERNEL
	68	#include <machine/stdarg.h>
	69	#undef KERNEL
	70
	71	static void kprintn __P((u_long, int));
	72
	73	void
	74	#if __STDC__
	75	printf(const char *fmt, ...)
	76	#else
	77	printf(fmt /* , va_alist */)
	78	char *fmt;
	79	#endif
	80	{
	81	register char *p;
	82	register int ch, n;
	83	unsigned long ul;
	84	int lflag, set;
	85	va_list ap;
	86
	87	va_start(ap, fmt);
	88	for (;;) {
	89	while ((ch = *fmt++) != '%') {
	90	if (ch == '\0')
	91	return;
	92	putchar(ch);
	93	}
	94	lflag = 0;
	95	reswitch: switch (ch = *fmt++) {
	96	case 'l':
	97	lflag = 1;
	98	goto reswitch;
99	case 'b':
100	ul = va_arg(ap, int);
101	p = va_arg(ap, char *);
102	kprintn(ul, *p++);
103
104	if (!ul)
105	break;
106
107	for (set = 0; n = *p++;) {
108	if (ul & (1 << (n - 1))) {
109	putchar(set ? ',' : '<');
110	for (; (n = *p) > ' '; ++p)
111	putchar(n);
112	set = 1;
113	} else
114	for (; *p > ' '; ++p);
115	}
116	if (set)
117	putchar('>');
118	break;
119	case 'c':
120	ch = va_arg(ap, int);
121	putchar(ch & 0x7f);
122	break;
123	case 's':
124	p = va_arg(ap, char *);
125	while (ch = *p++)
126	putchar(ch);
127	break;
128	case 'd':
129	ul = lflag ?
130	va_arg(ap, long) : va_arg(ap, int);
131	if ((long)ul < 0) {
132	putchar('-');
133	ul = -(long)ul;
134	}
135	kprintn(ul, 10);
136	break;
137	case 'o':
138	ul = lflag ?
139	va_arg(ap, u_long) : va_arg(ap, u_int);
140	kprintn(ul, 8);
141	break;
142	case 'u':
143	ul = lflag ?
144	va_arg(ap, u_long) : va_arg(ap, u_int);
145	kprintn(ul, 10);
146	break;
147	case 'x':
148	ul = lflag ?
149	va_arg(ap, u_long) : va_arg(ap, u_int);
150	kprintn(ul, 16);
151	break;
152	default:
153	putchar('%');
154	if (lflag)
155	putchar('l');
156	putchar(ch);
157	}
158	}
159	va_end(ap);
160	}
161
162	static void
163	kprintn(ul, base)
164	unsigned long ul;
165	int base;
166	{
167	/* hold a long in base 8 */
168	char p, buf[(sizeof(long) NBBY / 3) + 1];
169
170	p = buf;
171	do {
172	*p++ = "0123456789abcdef"[ul % base];
173	} while (ul /= base);
174	do {
175	putchar(*--p);
176	} while (p > buf);
177	}