--- /dev/null
+
+#include <limits.h>
+#include <stdarg.h>
+
+#include "putty.h"
+
+#define __P(decl) decl
+
+/* XXX */
+typedef unsigned long u_quad_t;
+typedef long quad_t;
+
+typedef unsigned long u_long;
+typedef unsigned int u_int;
+typedef unsigned short u_short;
+typedef long intmax_t;
+typedef unsigned long uintmax_t;
+typedef long intptr_t;
+typedef unsigned long uintptr_t;
+typedef int ssize_t;
+
+#define NBBY CHAR_BIT
+
+/*-
+ * 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. 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 NetBSD: subr_prf.c,v 1.86 2002/11/02 07:25:22 perry Exp
+ * @(#)subr_prf.c 8.4 (Berkeley) 5/4/95
+ */
+
+/* flags for kprintf */
+#define TOCONS 0x01 /* to the console */
+#define TOTTY 0x02 /* to the process' tty */
+#define TOLOG 0x04 /* to the kernel message buffer */
+#define TOBUFONLY 0x08 /* to the buffer (only) [for snprintf] */
+#define TODDB 0x10 /* to ddb console */
+
+/* max size buffer kprintf needs to print quad_t [size in base 8 + \0] */
+#define KPRINTF_BUFSIZE (sizeof(quad_t) * NBBY / 3 + 2)
+
+
+/*
+ * local prototypes
+ */
+
+static int kprintf __P((const char *, int, void *,
+ char *, va_list));
+
+/*
+ * vsnprintf: print a message to a buffer [already have va_alist]
+ */
+int
+vsnprintf(buf, size, fmt, ap)
+ char *buf;
+ size_t size;
+ const char *fmt;
+ va_list ap;
+{
+ int retval;
+ char *p;
+
+ if (size < 1)
+ return (-1);
+ p = buf + size - 1;
+ retval = kprintf(fmt, TOBUFONLY, &p, buf, ap);
+ *(p) = 0; /* null terminate */
+ return(retval);
+}
+
+
+/*
+ * kprintf: scaled down version of printf(3).
+ *
+ * this version based on vfprintf() from libc which was derived from
+ * software contributed to Berkeley by Chris Torek.
+ *
+ * NOTE: The kprintf mutex must be held if we're going TOBUF or TOCONS!
+ */
+
+/*
+ * macros for converting digits to letters and vice versa
+ */
+#define to_digit(c) ((c) - '0')
+#define is_digit(c) ((unsigned)to_digit(c) <= 9)
+#define to_char(n) ((n) + '0')
+
+/*
+ * flags used during conversion.
+ */
+#define ALT 0x001 /* alternate form */
+#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
+#define LADJUST 0x004 /* left adjustment */
+#define LONGDBL 0x008 /* long double; unimplemented */
+#define LONGINT 0x010 /* long integer */
+#define QUADINT 0x020 /* quad integer */
+#define SHORTINT 0x040 /* short integer */
+#define MAXINT 0x080 /* intmax_t */
+#define PTRINT 0x100 /* intptr_t */
+#define SIZEINT 0x200 /* size_t */
+#define ZEROPAD 0x400 /* zero (as opposed to blank) pad */
+#define FPT 0x800 /* Floating point number */
+
+ /*
+ * To extend shorts properly, we need both signed and unsigned
+ * argument extraction methods.
+ */
+#define SARG() \
+ (flags&MAXINT ? va_arg(ap, intmax_t) : \
+ flags&PTRINT ? va_arg(ap, intptr_t) : \
+ flags&SIZEINT ? va_arg(ap, ssize_t) : /* XXX */ \
+ flags&QUADINT ? va_arg(ap, quad_t) : \
+ flags&LONGINT ? va_arg(ap, long) : \
+ flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
+ (long)va_arg(ap, int))
+#define UARG() \
+ (flags&MAXINT ? va_arg(ap, uintmax_t) : \
+ flags&PTRINT ? va_arg(ap, uintptr_t) : \
+ flags&SIZEINT ? va_arg(ap, size_t) : \
+ flags&QUADINT ? va_arg(ap, u_quad_t) : \
+ flags&LONGINT ? va_arg(ap, u_long) : \
+ flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
+ (u_long)va_arg(ap, u_int))
+
+#define KPRINTF_PUTCHAR(C) { \
+ if (oflags == TOBUFONLY) { \
+ if ((vp != NULL) && (sbuf == tailp)) { \
+ ret += 1; /* indicate error */ \
+ goto overflow; \
+ } \
+ *sbuf++ = (C); \
+ } \
+}
+
+/*
+ * Guts of kernel printf. Note, we already expect to be in a mutex!
+ */
+static int
+kprintf(fmt0, oflags, vp, sbuf, ap)
+ const char *fmt0;
+ int oflags;
+ void *vp;
+ char *sbuf;
+ va_list ap;
+{
+ char *fmt; /* format string */
+ int ch; /* character from fmt */
+ int n; /* handy integer (short term usage) */
+ char *cp; /* handy char pointer (short term usage) */
+ int flags; /* flags as above */
+ int ret; /* return value accumulator */
+ int width; /* width from format (%8d), or 0 */
+ int prec; /* precision from format (%.3d), or -1 */
+ char sign; /* sign prefix (' ', '+', '-', or \0) */
+
+ u_quad_t _uquad; /* integer arguments %[diouxX] */
+ enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */
+ int dprec; /* a copy of prec if [diouxX], 0 otherwise */
+ int realsz; /* field size expanded by dprec */
+ int size; /* size of converted field or string */
+ char *xdigs; /* digits for [xX] conversion */
+ char buf[KPRINTF_BUFSIZE]; /* space for %c, %[diouxX] */
+ char *tailp; /* tail pointer for snprintf */
+
+ tailp = NULL; /* XXX: shutup gcc */
+ if (oflags == TOBUFONLY && (vp != NULL))
+ tailp = *(char **)vp;
+
+ cp = NULL; /* XXX: shutup gcc */
+ size = 0; /* XXX: shutup gcc */
+
+ fmt = (char *)fmt0;
+ ret = 0;
+
+ xdigs = NULL; /* XXX: shut up gcc warning */
+
+ /*
+ * Scan the format for conversions (`%' character).
+ */
+ for (;;) {
+ while (*fmt != '%' && *fmt) {
+ ret++;
+ KPRINTF_PUTCHAR(*fmt++);
+ }
+ if (*fmt == 0)
+ goto done;
+
+ fmt++; /* skip over '%' */
+
+ flags = 0;
+ dprec = 0;
+ width = 0;
+ prec = -1;
+ sign = '\0';
+
+rflag: ch = *fmt++;
+reswitch: switch (ch) {
+ case ' ':
+ /*
+ * ``If the space and + flags both appear, the space
+ * flag will be ignored.''
+ * -- ANSI X3J11
+ */
+ if (!sign)
+ sign = ' ';
+ goto rflag;
+ case '#':
+ flags |= ALT;
+ goto rflag;
+ case '*':
+ /*
+ * ``A negative field width argument is taken as a
+ * - flag followed by a positive field width.''
+ * -- ANSI X3J11
+ * They don't exclude field widths read from args.
+ */
+ if ((width = va_arg(ap, int)) >= 0)
+ goto rflag;
+ width = -width;
+ /* FALLTHROUGH */
+ case '-':
+ flags |= LADJUST;
+ goto rflag;
+ case '+':
+ sign = '+';
+ goto rflag;
+ case '.':
+ if ((ch = *fmt++) == '*') {
+ n = va_arg(ap, int);
+ prec = n < 0 ? -1 : n;
+ goto rflag;
+ }
+ n = 0;
+ while (is_digit(ch)) {
+ n = 10 * n + to_digit(ch);
+ ch = *fmt++;
+ }
+ prec = n < 0 ? -1 : n;
+ goto reswitch;
+ case '0':
+ /*
+ * ``Note that 0 is taken as a flag, not as the
+ * beginning of a field width.''
+ * -- ANSI X3J11
+ */
+ flags |= ZEROPAD;
+ goto rflag;
+ case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ n = 0;
+ do {
+ n = 10 * n + to_digit(ch);
+ ch = *fmt++;
+ } while (is_digit(ch));
+ width = n;
+ goto reswitch;
+ case 'h':
+ flags |= SHORTINT;
+ goto rflag;
+ case 'j':
+ flags |= MAXINT;
+ goto rflag;
+ case 'l':
+ if (*fmt == 'l') {
+ fmt++;
+ flags |= QUADINT;
+ } else {
+ flags |= LONGINT;
+ }
+ goto rflag;
+ case 'q':
+ flags |= QUADINT;
+ goto rflag;
+ case 't':
+ flags |= PTRINT;
+ goto rflag;
+ case 'z':
+ flags |= SIZEINT;
+ goto rflag;
+ case 'c':
+ *(cp = buf) = va_arg(ap, int);
+ size = 1;
+ sign = '\0';
+ break;
+ case 'D':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'd':
+ case 'i':
+ _uquad = SARG();
+ if ((quad_t)_uquad < 0) {
+ _uquad = -_uquad;
+ sign = '-';
+ }
+ base = DEC;
+ goto number;
+ case 'n':
+ if (flags & MAXINT)
+ *va_arg(ap, intmax_t *) = ret;
+ else if (flags & PTRINT)
+ *va_arg(ap, intptr_t *) = ret;
+ else if (flags & SIZEINT)
+ *va_arg(ap, ssize_t *) = ret;
+ else if (flags & QUADINT)
+ *va_arg(ap, quad_t *) = ret;
+ else if (flags & LONGINT)
+ *va_arg(ap, long *) = ret;
+ else if (flags & SHORTINT)
+ *va_arg(ap, short *) = ret;
+ else
+ *va_arg(ap, int *) = ret;
+ continue; /* no output */
+ case 'O':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'o':
+ _uquad = UARG();
+ base = OCT;
+ goto nosign;
+ case 'p':
+ /*
+ * ``The argument shall be a pointer to void. The
+ * value of the pointer is converted to a sequence
+ * of printable characters, in an implementation-
+ * defined manner.''
+ * -- ANSI X3J11
+ */
+ /* NOSTRICT */
+ _uquad = (u_long)va_arg(ap, void *);
+ base = HEX;
+ xdigs = "0123456789abcdef";
+ flags |= HEXPREFIX;
+ ch = 'x';
+ goto nosign;
+ case 's':
+ if ((cp = va_arg(ap, char *)) == NULL)
+ cp = "(null)";
+ if (prec >= 0) {
+ /*
+ * can't use strlen; can only look for the
+ * NUL in the first `prec' characters, and
+ * strlen() will go further.
+ */
+ char *p = memchr(cp, 0, prec);
+
+ if (p != NULL) {
+ size = p - cp;
+ if (size > prec)
+ size = prec;
+ } else
+ size = prec;
+ } else
+ size = strlen(cp);
+ sign = '\0';
+ break;
+ case 'U':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'u':
+ _uquad = UARG();
+ base = DEC;
+ goto nosign;
+ case 'X':
+ xdigs = "0123456789ABCDEF";
+ goto hex;
+ case 'x':
+ xdigs = "0123456789abcdef";
+hex: _uquad = UARG();
+ base = HEX;
+ /* leading 0x/X only if non-zero */
+ if (flags & ALT && _uquad != 0)
+ flags |= HEXPREFIX;
+
+ /* unsigned conversions */
+nosign: sign = '\0';
+ /*
+ * ``... diouXx conversions ... if a precision is
+ * specified, the 0 flag will be ignored.''
+ * -- ANSI X3J11
+ */
+number: if ((dprec = prec) >= 0)
+ flags &= ~ZEROPAD;
+
+ /*
+ * ``The result of converting a zero value with an
+ * explicit precision of zero is no characters.''
+ * -- ANSI X3J11
+ */
+ cp = buf + KPRINTF_BUFSIZE;
+ if (_uquad != 0 || prec != 0) {
+ /*
+ * Unsigned mod is hard, and unsigned mod
+ * by a constant is easier than that by
+ * a variable; hence this switch.
+ */
+ switch (base) {
+ case OCT:
+ do {
+ *--cp = to_char(_uquad & 7);
+ _uquad >>= 3;
+ } while (_uquad);
+ /* handle octal leading 0 */
+ if (flags & ALT && *cp != '0')
+ *--cp = '0';
+ break;
+
+ case DEC:
+ /* many numbers are 1 digit */
+ while (_uquad >= 10) {
+ *--cp = to_char(_uquad % 10);
+ _uquad /= 10;
+ }
+ *--cp = to_char(_uquad);
+ break;
+
+ case HEX:
+ do {
+ *--cp = xdigs[_uquad & 15];
+ _uquad >>= 4;
+ } while (_uquad);
+ break;
+
+ default:
+ cp = "bug in kprintf: bad base";
+ size = strlen(cp);
+ goto skipsize;
+ }
+ }
+ size = buf + KPRINTF_BUFSIZE - cp;
+ skipsize:
+ break;
+ default: /* "%?" prints ?, unless ? is NUL */
+ if (ch == '\0')
+ goto done;
+ /* pretend it was %c with argument ch */
+ cp = buf;
+ *cp = ch;
+ size = 1;
+ sign = '\0';
+ break;
+ }
+
+ /*
+ * All reasonable formats wind up here. At this point, `cp'
+ * points to a string which (if not flags&LADJUST) should be
+ * padded out to `width' places. If flags&ZEROPAD, it should
+ * first be prefixed by any sign or other prefix; otherwise,
+ * it should be blank padded before the prefix is emitted.
+ * After any left-hand padding and prefixing, emit zeroes
+ * required by a decimal [diouxX] precision, then print the
+ * string proper, then emit zeroes required by any leftover
+ * floating precision; finally, if LADJUST, pad with blanks.
+ *
+ * Compute actual size, so we know how much to pad.
+ * size excludes decimal prec; realsz includes it.
+ */
+ realsz = dprec > size ? dprec : size;
+ if (sign)
+ realsz++;
+ else if (flags & HEXPREFIX)
+ realsz+= 2;
+
+ /* adjust ret */
+ ret += width > realsz ? width : realsz;
+
+ /* right-adjusting blank padding */
+ if ((flags & (LADJUST|ZEROPAD)) == 0) {
+ n = width - realsz;
+ while (n-- > 0)
+ KPRINTF_PUTCHAR(' ');
+ }
+
+ /* prefix */
+ if (sign) {
+ KPRINTF_PUTCHAR(sign);
+ } else if (flags & HEXPREFIX) {
+ KPRINTF_PUTCHAR('0');
+ KPRINTF_PUTCHAR(ch);
+ }
+
+ /* right-adjusting zero padding */
+ if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) {
+ n = width - realsz;
+ while (n-- > 0)
+ KPRINTF_PUTCHAR('0');
+ }
+
+ /* leading zeroes from decimal precision */
+ n = dprec - size;
+ while (n-- > 0)
+ KPRINTF_PUTCHAR('0');
+
+ /* the string or number proper */
+ while (size--)
+ KPRINTF_PUTCHAR(*cp++);
+ /* left-adjusting padding (always blank) */
+ if (flags & LADJUST) {
+ n = width - realsz;
+ while (n-- > 0)
+ KPRINTF_PUTCHAR(' ');
+ }
+ }
+
+done:
+ if ((oflags == TOBUFONLY) && (vp != NULL))
+ *(char **)vp = sbuf;
+overflow:
+ return (ret);
+ /* NOTREACHED */
+}
projects / u / mdw / putty / commitdiff