[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.
 *
 *	@(#)printf.c	5.6 (Berkeley) 5/25/91
 */

/*
 * 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	*
	33	* @(#)printf.c 5.6 (Berkeley) 5/25/91
	34	*/
	35
	36	/*
	37	* Scaled down version of printf(3).
	38	*
	39	* One additional format:
	40	*
	41	* The format %b is supported to decode error registers.
	42	* Its usage is:
	43	*
	44	* printf("reg=%b\n", regval, "<base><arg>*");
	45	*
	46	* where <base> is the output base expressed as a control character, e.g.
	47	* \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
	48	* the first of which gives the bit number to be inspected (origin 1), and
	49	* the next characters (up to a control character, i.e. a character <= 32),
	50	* give the name of the register. Thus:
	51	*
	52	* printf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
	53	*
	54	* would produce output:
	55	*
	56	* reg=3<BITTWO,BITONE>
	57	*/
	58
	59	#include <sys/cdefs.h>
	60	#include <sys/types.h>
	61
	62	/*
	63	* Note that stdarg.h and the ANSI style va_start macro is used for both
	64	* ANSI and traditional C compilers.
65	*/
66	#define KERNEL
67	#include <machine/stdarg.h>
68	#undef KERNEL
69
70	static void kprintn __P((u_long, int));
71
72	void
73	#if __STDC__
74	printf(const char *fmt, ...)
75	#else
76	printf(fmt /* , va_alist */)
77	char *fmt;
78	#endif
79	{
80	register char *p;
81	register int ch, n;
82	unsigned long ul;
83	int lflag, set;
84	va_list ap;
85
86	va_start(ap, fmt);
87	for (;;) {
88	while ((ch = *fmt++) != '%') {
89	if (ch == '\0')
90	return;
91	putchar(ch);
92	}
93	lflag = 0;
94	reswitch: switch (ch = *fmt++) {
95	case 'l':
96	lflag = 1;
97	goto reswitch;
98	case 'b':
99	ul = va_arg(ap, int);
100	p = va_arg(ap, char *);
101	kprintn(ul, *p++);
102
103	if (!ul)
104	break;
105
106	for (set = 0; n = *p++;) {
107	if (ul & (1 << (n - 1))) {
108	putchar(set ? ',' : '<');
109	for (; (n = *p) > ' '; ++p)
110	putchar(n);
111	set = 1;
112	} else
113	for (; *p > ' '; ++p);
114	}
115	if (set)
116	putchar('>');
117	break;
118	case 'c':
119	ch = va_arg(ap, int);
120	putchar(ch & 0x7f);
121	break;
122	case 's':
123	p = va_arg(ap, char *);
124	while (ch = *p++)
125	putchar(ch);
126	break;
127	case 'd':
128	ul = lflag ?
129	va_arg(ap, long) : va_arg(ap, int);
130	if ((long)ul < 0) {
131	putchar('-');
132	ul = -(long)ul;
133	}
134	kprintn(ul, 10);
135	break;
136	case 'o':
137	ul = lflag ?
138	va_arg(ap, u_long) : va_arg(ap, u_int);
139	kprintn(ul, 8);
140	break;
141	case 'u':
142	ul = lflag ?
143	va_arg(ap, u_long) : va_arg(ap, u_int);
144	kprintn(ul, 10);
145	break;
146	case 'x':
147	ul = lflag ?
148	va_arg(ap, u_long) : va_arg(ap, u_int);
149	kprintn(ul, 16);
150	break;
151	default:
152	putchar('%');
153	if (lflag)
154	putchar('l');
155	putchar(ch);
156	}
157	}
158	va_end(ap);
159	}
160
161	static void
162	kprintn(ul, base)
163	unsigned long ul;
164	int base;
165	{
166	/* hold a long in base 8 */
167	char p, buf[(sizeof(long) NBBY / 3) + 1];
168
169	p = buf;
170	do {
171	*p++ = "0123456789abcdef"[ul % base];
172	} while (ul /= base);
173	do {
174	putchar(*--p);
175	} while (p > buf);
176	}