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Add a vsnprintf() for the Mac, which doesn't have one of its own. This is
the NetBSD kernel printf, which is integer-only and under a Berkeley-style (now 3-clause) copyright owned by UCB. This has only been compile-tested, but almost all of my changes were in the definitions at the top (the exception being to remove tty output). This lacks 64-bit support because the Apple 68K C compiler, SC, lacks it too. [originally from svn r2451]
This commit is contained in:
Ben Harris
parent
a952ead769
commit
94b7de24f1
539
mac/vsnprint.c
Normal file
539
mac/vsnprint.c
Normal file
@ -0,0 +1,539 @@
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#include <limits.h>
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#include <stdarg.h>
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#include "putty.h"
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#define __P(decl) decl
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/* XXX */
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typedef unsigned long u_quad_t;
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typedef long quad_t;
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typedef unsigned long u_long;
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typedef unsigned int u_int;
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typedef unsigned short u_short;
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typedef long intmax_t;
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typedef unsigned long uintmax_t;
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typedef long intptr_t;
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typedef unsigned long uintptr_t;
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typedef int ssize_t;
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#define NBBY CHAR_BIT
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/*-
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* Copyright (c) 1986, 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From NetBSD: subr_prf.c,v 1.86 2002/11/02 07:25:22 perry Exp
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* @(#)subr_prf.c 8.4 (Berkeley) 5/4/95
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*/
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/* flags for kprintf */
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#define TOCONS 0x01 /* to the console */
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#define TOTTY 0x02 /* to the process' tty */
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#define TOLOG 0x04 /* to the kernel message buffer */
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#define TOBUFONLY 0x08 /* to the buffer (only) [for snprintf] */
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#define TODDB 0x10 /* to ddb console */
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/* max size buffer kprintf needs to print quad_t [size in base 8 + \0] */
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#define KPRINTF_BUFSIZE (sizeof(quad_t) * NBBY / 3 + 2)
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/*
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* local prototypes
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*/
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static int kprintf __P((const char *, int, void *,
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char *, va_list));
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/*
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* vsnprintf: print a message to a buffer [already have va_alist]
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*/
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int
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vsnprintf(buf, size, fmt, ap)
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char *buf;
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size_t size;
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const char *fmt;
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va_list ap;
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{
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int retval;
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char *p;
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if (size < 1)
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return (-1);
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p = buf + size - 1;
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retval = kprintf(fmt, TOBUFONLY, &p, buf, ap);
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*(p) = 0; /* null terminate */
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return(retval);
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}
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/*
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* kprintf: scaled down version of printf(3).
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*
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* this version based on vfprintf() from libc which was derived from
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* software contributed to Berkeley by Chris Torek.
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*
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* NOTE: The kprintf mutex must be held if we're going TOBUF or TOCONS!
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*/
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/*
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* macros for converting digits to letters and vice versa
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*/
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#define to_digit(c) ((c) - '0')
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#define is_digit(c) ((unsigned)to_digit(c) <= 9)
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#define to_char(n) ((n) + '0')
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/*
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* flags used during conversion.
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*/
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#define ALT 0x001 /* alternate form */
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#define HEXPREFIX 0x002 /* add 0x or 0X prefix */
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#define LADJUST 0x004 /* left adjustment */
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#define LONGDBL 0x008 /* long double; unimplemented */
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#define LONGINT 0x010 /* long integer */
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#define QUADINT 0x020 /* quad integer */
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#define SHORTINT 0x040 /* short integer */
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#define MAXINT 0x080 /* intmax_t */
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#define PTRINT 0x100 /* intptr_t */
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#define SIZEINT 0x200 /* size_t */
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#define ZEROPAD 0x400 /* zero (as opposed to blank) pad */
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#define FPT 0x800 /* Floating point number */
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/*
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* To extend shorts properly, we need both signed and unsigned
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* argument extraction methods.
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*/
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#define SARG() \
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(flags&MAXINT ? va_arg(ap, intmax_t) : \
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flags&PTRINT ? va_arg(ap, intptr_t) : \
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flags&SIZEINT ? va_arg(ap, ssize_t) : /* XXX */ \
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flags&QUADINT ? va_arg(ap, quad_t) : \
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flags&LONGINT ? va_arg(ap, long) : \
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flags&SHORTINT ? (long)(short)va_arg(ap, int) : \
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(long)va_arg(ap, int))
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#define UARG() \
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(flags&MAXINT ? va_arg(ap, uintmax_t) : \
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flags&PTRINT ? va_arg(ap, uintptr_t) : \
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flags&SIZEINT ? va_arg(ap, size_t) : \
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flags&QUADINT ? va_arg(ap, u_quad_t) : \
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flags&LONGINT ? va_arg(ap, u_long) : \
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flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \
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(u_long)va_arg(ap, u_int))
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#define KPRINTF_PUTCHAR(C) { \
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if (oflags == TOBUFONLY) { \
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if ((vp != NULL) && (sbuf == tailp)) { \
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ret += 1; /* indicate error */ \
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goto overflow; \
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} \
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*sbuf++ = (C); \
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} \
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}
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/*
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* Guts of kernel printf. Note, we already expect to be in a mutex!
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*/
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static int
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kprintf(fmt0, oflags, vp, sbuf, ap)
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const char *fmt0;
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int oflags;
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void *vp;
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char *sbuf;
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va_list ap;
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{
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char *fmt; /* format string */
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int ch; /* character from fmt */
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int n; /* handy integer (short term usage) */
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char *cp; /* handy char pointer (short term usage) */
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int flags; /* flags as above */
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int ret; /* return value accumulator */
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int width; /* width from format (%8d), or 0 */
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int prec; /* precision from format (%.3d), or -1 */
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char sign; /* sign prefix (' ', '+', '-', or \0) */
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u_quad_t _uquad; /* integer arguments %[diouxX] */
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enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */
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int dprec; /* a copy of prec if [diouxX], 0 otherwise */
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int realsz; /* field size expanded by dprec */
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int size; /* size of converted field or string */
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char *xdigs; /* digits for [xX] conversion */
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char buf[KPRINTF_BUFSIZE]; /* space for %c, %[diouxX] */
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char *tailp; /* tail pointer for snprintf */
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tailp = NULL; /* XXX: shutup gcc */
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if (oflags == TOBUFONLY && (vp != NULL))
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tailp = *(char **)vp;
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cp = NULL; /* XXX: shutup gcc */
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size = 0; /* XXX: shutup gcc */
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fmt = (char *)fmt0;
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ret = 0;
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xdigs = NULL; /* XXX: shut up gcc warning */
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/*
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* Scan the format for conversions (`%' character).
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*/
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for (;;) {
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while (*fmt != '%' && *fmt) {
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ret++;
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KPRINTF_PUTCHAR(*fmt++);
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}
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if (*fmt == 0)
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goto done;
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fmt++; /* skip over '%' */
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flags = 0;
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dprec = 0;
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width = 0;
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prec = -1;
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sign = '\0';
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rflag: ch = *fmt++;
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reswitch: switch (ch) {
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case ' ':
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/*
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* ``If the space and + flags both appear, the space
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* flag will be ignored.''
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* -- ANSI X3J11
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*/
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if (!sign)
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sign = ' ';
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goto rflag;
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case '#':
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flags |= ALT;
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goto rflag;
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case '*':
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/*
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* ``A negative field width argument is taken as a
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* - flag followed by a positive field width.''
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* -- ANSI X3J11
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* They don't exclude field widths read from args.
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*/
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if ((width = va_arg(ap, int)) >= 0)
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goto rflag;
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width = -width;
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/* FALLTHROUGH */
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case '-':
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flags |= LADJUST;
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goto rflag;
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case '+':
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sign = '+';
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goto rflag;
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case '.':
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if ((ch = *fmt++) == '*') {
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n = va_arg(ap, int);
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prec = n < 0 ? -1 : n;
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goto rflag;
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}
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n = 0;
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while (is_digit(ch)) {
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n = 10 * n + to_digit(ch);
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ch = *fmt++;
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}
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prec = n < 0 ? -1 : n;
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goto reswitch;
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case '0':
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/*
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* ``Note that 0 is taken as a flag, not as the
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* beginning of a field width.''
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* -- ANSI X3J11
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*/
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flags |= ZEROPAD;
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goto rflag;
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case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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n = 0;
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do {
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n = 10 * n + to_digit(ch);
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ch = *fmt++;
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} while (is_digit(ch));
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width = n;
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goto reswitch;
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case 'h':
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flags |= SHORTINT;
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goto rflag;
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case 'j':
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flags |= MAXINT;
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goto rflag;
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case 'l':
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if (*fmt == 'l') {
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fmt++;
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flags |= QUADINT;
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} else {
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flags |= LONGINT;
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}
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goto rflag;
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case 'q':
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flags |= QUADINT;
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goto rflag;
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case 't':
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flags |= PTRINT;
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goto rflag;
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case 'z':
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flags |= SIZEINT;
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goto rflag;
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case 'c':
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*(cp = buf) = va_arg(ap, int);
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size = 1;
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sign = '\0';
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break;
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case 'D':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'd':
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case 'i':
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_uquad = SARG();
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if ((quad_t)_uquad < 0) {
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_uquad = -_uquad;
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sign = '-';
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}
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base = DEC;
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goto number;
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case 'n':
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if (flags & MAXINT)
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*va_arg(ap, intmax_t *) = ret;
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else if (flags & PTRINT)
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*va_arg(ap, intptr_t *) = ret;
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else if (flags & SIZEINT)
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*va_arg(ap, ssize_t *) = ret;
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else if (flags & QUADINT)
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*va_arg(ap, quad_t *) = ret;
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else if (flags & LONGINT)
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*va_arg(ap, long *) = ret;
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else if (flags & SHORTINT)
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*va_arg(ap, short *) = ret;
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else
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*va_arg(ap, int *) = ret;
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continue; /* no output */
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case 'O':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'o':
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_uquad = UARG();
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base = OCT;
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goto nosign;
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case 'p':
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/*
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* ``The argument shall be a pointer to void. The
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* value of the pointer is converted to a sequence
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* of printable characters, in an implementation-
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* defined manner.''
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* -- ANSI X3J11
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*/
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/* NOSTRICT */
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_uquad = (u_long)va_arg(ap, void *);
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base = HEX;
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xdigs = "0123456789abcdef";
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flags |= HEXPREFIX;
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ch = 'x';
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goto nosign;
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case 's':
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if ((cp = va_arg(ap, char *)) == NULL)
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cp = "(null)";
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if (prec >= 0) {
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/*
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* can't use strlen; can only look for the
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* NUL in the first `prec' characters, and
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* strlen() will go further.
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*/
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char *p = memchr(cp, 0, prec);
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if (p != NULL) {
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size = p - cp;
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if (size > prec)
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size = prec;
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} else
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size = prec;
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} else
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size = strlen(cp);
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sign = '\0';
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break;
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case 'U':
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flags |= LONGINT;
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/*FALLTHROUGH*/
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case 'u':
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_uquad = UARG();
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base = DEC;
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goto nosign;
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case 'X':
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xdigs = "0123456789ABCDEF";
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goto hex;
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case 'x':
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xdigs = "0123456789abcdef";
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hex: _uquad = UARG();
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base = HEX;
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/* leading 0x/X only if non-zero */
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if (flags & ALT && _uquad != 0)
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flags |= HEXPREFIX;
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/* unsigned conversions */
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nosign: sign = '\0';
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/*
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* ``... diouXx conversions ... if a precision is
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* specified, the 0 flag will be ignored.''
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* -- ANSI X3J11
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*/
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number: if ((dprec = prec) >= 0)
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flags &= ~ZEROPAD;
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/*
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* ``The result of converting a zero value with an
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* explicit precision of zero is no characters.''
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* -- ANSI X3J11
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*/
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cp = buf + KPRINTF_BUFSIZE;
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if (_uquad != 0 || prec != 0) {
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/*
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* Unsigned mod is hard, and unsigned mod
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* by a constant is easier than that by
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* a variable; hence this switch.
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*/
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switch (base) {
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case OCT:
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do {
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*--cp = to_char(_uquad & 7);
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_uquad >>= 3;
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} while (_uquad);
|
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/* handle octal leading 0 */
|
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if (flags & ALT && *cp != '0')
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*--cp = '0';
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break;
|
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case DEC:
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/* many numbers are 1 digit */
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while (_uquad >= 10) {
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*--cp = to_char(_uquad % 10);
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_uquad /= 10;
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}
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*--cp = to_char(_uquad);
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break;
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case HEX:
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do {
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*--cp = xdigs[_uquad & 15];
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_uquad >>= 4;
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} while (_uquad);
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break;
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|
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default:
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cp = "bug in kprintf: bad base";
|
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size = strlen(cp);
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goto skipsize;
|
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}
|
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}
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size = buf + KPRINTF_BUFSIZE - cp;
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skipsize:
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break;
|
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default: /* "%?" prints ?, unless ? is NUL */
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if (ch == '\0')
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goto done;
|
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/* pretend it was %c with argument ch */
|
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cp = buf;
|
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*cp = ch;
|
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size = 1;
|
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sign = '\0';
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break;
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}
|
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|
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/*
|
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* All reasonable formats wind up here. At this point, `cp'
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* points to a string which (if not flags&LADJUST) should be
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* padded out to `width' places. If flags&ZEROPAD, it should
|
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* first be prefixed by any sign or other prefix; otherwise,
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* it should be blank padded before the prefix is emitted.
|
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* After any left-hand padding and prefixing, emit zeroes
|
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* required by a decimal [diouxX] precision, then print the
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* string proper, then emit zeroes required by any leftover
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* floating precision; finally, if LADJUST, pad with blanks.
|
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*
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* Compute actual size, so we know how much to pad.
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* size excludes decimal prec; realsz includes it.
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*/
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realsz = dprec > size ? dprec : size;
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if (sign)
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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 */
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user