This is libstand; a support library for standalone executables (eg. bootstrap

modules).
Obtained from: NetBSD, with some architectural changes and many additions.

1 files changed, 355 insertions, 0 deletions

diff --git a/lib/libstand/printf.c b/lib/libstand/printf.c
new file mode 100644
index 0000000..8c7b384
--- /dev/null
+++ b/lib/libstand/printf.c
@@ -0,0 +1,355 @@
+/*-
+ * Copyright (c) 1986, 1988, 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ *
+ *	@(#)subr_prf.c	8.3 (Berkeley) 1/21/94
+ * $Id: subr_prf.c,v 1.46 1998/05/28 09:30:20 phk Exp $
+ */
+
+/*
+ * Standaloneified version of the FreeBSD kernel printf family.
+ */
+
+#include <sys/types.h>
+#include "stand.h"
+
+/*
+ * Note that stdarg.h and the ANSI style va_start macro is used for both
+ * ANSI and traditional C compilers.
+ */
+#include <machine/stdarg.h>
+
+static char	*ksprintn (u_long num, int base, int *len);
+static int	kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap);
+
+int
+printf(const char *fmt, ...)
+{
+	va_list ap;
+	int retval;
+
+	va_start(ap, fmt);
+	retval = kvprintf(fmt, putchar, NULL, 10, ap);
+	va_end(ap);
+	return retval;
+}
+
+void
+vprintf(const char *fmt, va_list ap)
+{
+
+	kvprintf(fmt, putchar, NULL, 10, ap);
+}
+
+/*
+ * Scaled down version of sprintf(3).
+ */
+int
+sprintf(char *buf, const char *cfmt, ...)
+{
+	int retval;
+	va_list ap;
+
+	va_start(ap, cfmt);
+	retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
+	buf[retval] = '\0';
+	va_end(ap);
+	return retval;
+}
+
+/*
+ * Put a number (base <= 16) in a buffer in reverse order; return an
+ * optional length and a pointer to the NULL terminated (preceded?)
+ * buffer.
+ */
+static char *
+ksprintn(ul, base, lenp)
+	register u_long ul;
+	register int base, *lenp;
+{					/* A long in base 8, plus NULL. */
+	static char buf[sizeof(long) * NBBY / 3 + 2];
+	register char *p;
+
+	p = buf;
+	do {
+		*++p = hex2ascii(ul % base);
+	} while (ul /= base);
+	if (lenp)
+		*lenp = p - buf;
+	return (p);
+}
+
+/*
+ * Scaled down version of printf(3).
+ *
+ * Two additional formats:
+ *
+ * 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:
+ *
+ *	kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
+ *
+ * would produce output:
+ *
+ *	reg=3<BITTWO,BITONE>
+ *
+ * XXX:  %D  -- Hexdump, takes pointer and separator string:
+ *		("%6D", ptr, ":")   -> XX:XX:XX:XX:XX:XX
+ *		("%*D", len, ptr, " " -> XX XX XX XX ...
+ */
+static int
+kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap)
+{
+#define PCHAR(c) {int cc=(c); if (func) (*func)(cc); else *d++ = cc; retval++; }
+	char *p, *q, *d;
+	u_char *up;
+	int ch, n;
+	u_long ul;
+	int base, lflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
+	int dwidth;
+	char padc;
+	int retval = 0;
+
+	if (!func)
+		d = (char *) arg;
+	else
+		d = NULL;
+
+	if (fmt == NULL)
+		fmt = "(fmt null)\n";
+
+	if (radix < 2 || radix > 36)
+		radix = 10;
+
+	for (;;) {
+		padc = ' ';
+		width = 0;
+		while ((ch = (u_char)*fmt++) != '%') {
+			if (ch == '\0') 
+				return retval;
+			PCHAR(ch);
+		}
+		lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
+		sign = 0; dot = 0; dwidth = 0;
+reswitch:	switch (ch = (u_char)*fmt++) {
+		case '.':
+			dot = 1;
+			goto reswitch;
+		case '#':
+			sharpflag = 1;
+			goto reswitch;
+		case '+':
+			sign = 1;
+			goto reswitch;
+		case '-':
+			ladjust = 1;
+			goto reswitch;
+		case '%':
+			PCHAR(ch);
+			break;
+		case '*':
+			if (!dot) {
+				width = va_arg(ap, int);
+				if (width < 0) {
+					ladjust = !ladjust;
+					width = -width;
+				}
+			} else {
+				dwidth = va_arg(ap, int);
+			}
+			goto reswitch;
+		case '0':
+			if (!dot) {
+				padc = '0';
+				goto reswitch;
+			}
+		case '1': case '2': case '3': case '4':
+		case '5': case '6': case '7': case '8': case '9':
+				for (n = 0;; ++fmt) {
+					n = n * 10 + ch - '0';
+					ch = *fmt;
+					if (ch < '0' || ch > '9')
+						break;
+				}
+			if (dot)
+				dwidth = n;
+			else
+				width = n;
+			goto reswitch;
+		case 'b':
+			ul = va_arg(ap, int);
+			p = va_arg(ap, char *);
+			for (q = ksprintn(ul, *p++, NULL); *q;)
+				PCHAR(*q--);
+
+			if (!ul)
+				break;
+
+			for (tmp = 0; *p;) {
+				n = *p++;
+				if (ul & (1 << (n - 1))) {
+					PCHAR(tmp ? ',' : '<');
+					for (; (n = *p) > ' '; ++p)
+						PCHAR(n);
+					tmp = 1;
+				} else
+					for (; *p > ' '; ++p)
+						continue;
+			}
+			if (tmp)
+				PCHAR('>');
+			break;
+		case 'c':
+			PCHAR(va_arg(ap, int));
+			break;
+		case 'D':
+			up = va_arg(ap, u_char *);
+			p = va_arg(ap, char *);
+			if (!width)
+				width = 16;
+			while(width--) {
+				PCHAR(hex2ascii(*up >> 4));
+				PCHAR(hex2ascii(*up & 0x0f));
+				up++;
+				if (width)
+					for (q=p;*q;q++)
+						PCHAR(*q);
+			}
+			break;
+		case 'd':
+			ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
+			sign = 1;
+			base = 10;
+			goto number;
+		case 'l':
+			lflag = 1;
+			goto reswitch;
+		case 'n':
+			ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+			base = radix;
+			goto number;
+		case 'o':
+			ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+			base = 8;
+			goto number;
+		case 'p':
+			ul = (u_long)va_arg(ap, void *);
+			base = 16;
+			sharpflag = 1;
+			goto number;
+		case 's':
+			p = va_arg(ap, char *);
+			if (p == NULL)
+				p = "(null)";
+			if (!dot)
+				n = strlen (p);
+			else
+				for (n = 0; n < dwidth && p[n]; n++)
+					continue;
+
+			width -= n;
+
+			if (!ladjust && width > 0)
+				while (width--)
+					PCHAR(padc);
+			while (n--)
+				PCHAR(*p++);
+			if (ladjust && width > 0)
+				while (width--)
+					PCHAR(padc);
+			break;
+		case 'u':
+			ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+			base = 10;
+			goto number;
+		case 'x':
+			ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+			base = 16;
+number:			if (sign && (long)ul < 0L) {
+				neg = 1;
+				ul = -(long)ul;
+			}
+			p = ksprintn(ul, base, &tmp);
+			if (sharpflag && ul != 0) {
+				if (base == 8)
+					tmp++;
+				else if (base == 16)
+					tmp += 2;
+			}
+			if (neg)
+				tmp++;
+
+			if (!ladjust && width && (width -= tmp) > 0)
+				while (width--)
+					PCHAR(padc);
+			if (neg)
+				PCHAR('-');
+			if (sharpflag && ul != 0) {
+				if (base == 8) {
+					PCHAR('0');
+				} else if (base == 16) {
+					PCHAR('0');
+					PCHAR('x');
+				}
+			}
+
+			while (*p)
+				PCHAR(*p--);
+
+			if (ladjust && width && (width -= tmp) > 0)
+				while (width--)
+					PCHAR(padc);
+
+			break;
+		default:
+			PCHAR('%');
+			if (lflag)
+				PCHAR('l');
+			PCHAR(ch);
+			break;
+		}
+	}
+#undef PCHAR
+}
+