2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
498 lines
12 KiB
C
498 lines
12 KiB
C
/* $NetBSD: vsnprintf_ss.c,v 1.9 2009/12/17 15:19:48 christos Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)vsnprintf.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: vsnprintf_ss.c,v 1.9 2009/12/17 15:19:48 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <inttypes.h>
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#include <assert.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <string.h>
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#include "reentrant.h"
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#include "extern.h"
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#include "local.h"
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#ifdef __weak_alias
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__weak_alias(vsnprintf_ss,_vsnprintf_ss)
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#endif
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/*
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* vsnprintf_ss: 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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*/
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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) (char)((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 PUTCHAR(C) do { \
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if (sbuf < tailp) \
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*sbuf++ = (C); \
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} while (/*CONSTCOND*/0)
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int
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vsnprintf_ss(char *sbuf, size_t slen, const char *fmt0, _BSD_VA_LIST_ ap)
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{
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const 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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const char *xdigs; /* digits for [xX] conversion */
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char bf[128]; /* space for %c, %[diouxX] */
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char *tailp; /* tail pointer for snprintf */
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static const char xdigs_lower[16] = "0123456789abcdef";
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static const char xdigs_upper[16] = "0123456789ABCDEF";
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_DIAGASSERT(slen == 0 || sbuf != NULL);
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_DIAGASSERT(fmt0 != NULL);
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if ((int)slen < 0) {
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errno = EINVAL;
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return (-1);
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}
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tailp = sbuf + slen;
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cp = NULL; /* XXX: shutup gcc */
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size = 0; /* XXX: shutup gcc */
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fmt = 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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PUTCHAR(*fmt);
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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 = bf) = 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 = xdigs_lower;
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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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/*XXXUNCONST*/
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cp = __UNCONST("(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, (size_t)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 = xdigs_upper;
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goto hex;
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case 'x':
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xdigs = xdigs_lower;
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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 = bf + sizeof(bf);
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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[(size_t)_uquad & 15];
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_uquad >>= 4;
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} while (_uquad);
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break;
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default:
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/*XXXUNCONST*/
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cp = __UNCONST("bug 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 = bf + sizeof(bf) - 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 = bf;
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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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* 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++;
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else if (flags & HEXPREFIX)
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realsz+= 2;
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/* adjust ret */
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ret += width > realsz ? width : realsz;
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/* right-adjusting blank padding */
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if ((flags & (LADJUST|ZEROPAD)) == 0) {
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n = width - realsz;
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while (n-- > 0)
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PUTCHAR(' ');
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}
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/* prefix */
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if (sign) {
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PUTCHAR(sign);
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} else if (flags & HEXPREFIX) {
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PUTCHAR('0');
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PUTCHAR(ch);
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}
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/* right-adjusting zero padding */
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if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) {
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n = width - realsz;
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while (n-- > 0)
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PUTCHAR('0');
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}
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/* leading zeroes from decimal precision */
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n = dprec - size;
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while (n-- > 0)
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PUTCHAR('0');
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/* the string or number proper */
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while (size--)
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PUTCHAR(*cp++);
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/* left-adjusting padding (always blank) */
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if (flags & LADJUST) {
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n = width - realsz;
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while (n-- > 0)
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PUTCHAR(' ');
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}
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}
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done:
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if (sbuf == tailp)
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sbuf[-1] = '\0';
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else
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*sbuf = '\0';
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return (ret);
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/* NOTREACHED */
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}
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