1312 lines
30 KiB
C
1312 lines
30 KiB
C
/* $OpenBSD: vfprintf.c,v 1.37 2006/01/13 17:56:18 millert Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* 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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/*
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* Actual printf innards.
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*
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* This code is large and complicated...
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "local.h"
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#include "fvwrite.h"
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static void __find_arguments(const char *fmt0, va_list ap, va_list **argtable,
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size_t *argtablesiz);
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static int __grow_type_table(unsigned char **typetable, int *tablesize);
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/*
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* Flush out all the vectors defined by the given uio,
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* then reset it so that it can be reused.
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*/
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static int
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__sprint(FILE *fp, struct __suio *uio)
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{
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int err;
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if (uio->uio_resid == 0) {
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uio->uio_iovcnt = 0;
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return (0);
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}
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err = __sfvwrite(fp, uio);
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uio->uio_resid = 0;
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uio->uio_iovcnt = 0;
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return (err);
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}
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/*
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* Helper function for `fprintf to unbuffered unix file': creates a
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* temporary buffer. We only work on write-only files; this avoids
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* worries about ungetc buffers and so forth.
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*/
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static int
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__sbprintf(FILE *fp, const char *fmt, va_list ap)
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{
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int ret;
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FILE fake;
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struct __sfileext fakeext;
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unsigned char buf[BUFSIZ];
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_FILEEXT_SETUP(&fake, &fakeext);
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/* copy the important variables */
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fake._flags = fp->_flags & ~__SNBF;
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fake._file = fp->_file;
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fake._cookie = fp->_cookie;
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fake._write = fp->_write;
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/* set up the buffer */
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fake._bf._base = fake._p = buf;
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fake._bf._size = fake._w = sizeof(buf);
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fake._lbfsize = 0; /* not actually used, but Just In Case */
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/* do the work, then copy any error status */
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ret = vfprintf(&fake, fmt, ap);
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if (ret >= 0 && fflush(&fake))
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ret = EOF;
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if (fake._flags & __SERR)
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fp->_flags |= __SERR;
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return (ret);
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}
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#ifdef FLOATING_POINT
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#include <locale.h>
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#include <math.h>
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#include "floatio.h"
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#define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
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#define DEFPREC 6
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static char *cvt(double, int, int, char *, int *, int, int *);
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static int exponent(char *, int, int);
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#else /* no FLOATING_POINT */
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#define BUF 40
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#endif /* FLOATING_POINT */
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#define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
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/* BIONIC: do not link libm for only two rather simple functions */
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#ifdef FLOATING_POINT
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static int _my_isinf(double);
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static int _my_isnan(double);
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#endif
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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 0x0001 /* alternate form */
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#define HEXPREFIX 0x0002 /* add 0x or 0X prefix */
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#define LADJUST 0x0004 /* left adjustment */
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#define LONGDBL 0x0008 /* long double; unimplemented */
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#define LONGINT 0x0010 /* long integer */
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#define LLONGINT 0x0020 /* long long integer */
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#define SHORTINT 0x0040 /* short integer */
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#define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */
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#define FPT 0x0100 /* Floating point number */
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#define PTRINT 0x0200 /* (unsigned) ptrdiff_t */
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#define SIZEINT 0x0400 /* (signed) size_t */
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#define CHARINT 0x0800 /* 8 bit integer */
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#define MAXINT 0x1000 /* largest integer size (intmax_t) */
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int
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vfprintf(FILE *fp, const char *fmt0, __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, m, n2; /* handy integers (short term usage) */
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char *cp; /* handy char pointer (short term usage) */
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char *cp_free = NULL; /* BIONIC: copy of cp to be freed after usage */
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struct __siov *iovp;/* for PRINT macro */
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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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wchar_t wc;
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void* ps;
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#ifdef FLOATING_POINT
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char *decimal_point = ".";
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char softsign; /* temporary negative sign for floats */
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double _double = 0.; /* double precision arguments %[eEfgG] */
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int expt; /* integer value of exponent */
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int expsize = 0; /* character count for expstr */
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int ndig; /* actual number of digits returned by cvt */
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char expstr[7]; /* buffer for exponent string */
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#endif
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uintmax_t _umax; /* 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 = NULL; /* digits for [xX] conversion */
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#define NIOV 8
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struct __suio uio; /* output information: summary */
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struct __siov iov[NIOV];/* ... and individual io vectors */
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char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
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char ox[2]; /* space for 0x hex-prefix */
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va_list *argtable; /* args, built due to positional arg */
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va_list statargtable[STATIC_ARG_TBL_SIZE];
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size_t argtablesiz;
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int nextarg; /* 1-based argument index */
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va_list orgap; /* original argument pointer */
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/*
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* Choose PADSIZE to trade efficiency vs. size. If larger printf
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* fields occur frequently, increase PADSIZE and make the initialisers
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* below longer.
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*/
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#define PADSIZE 16 /* pad chunk size */
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static char blanks[PADSIZE] =
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{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
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static char zeroes[PADSIZE] =
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{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
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/*
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* BEWARE, these `goto error' on error, and PAD uses `n'.
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*/
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#define PRINT(ptr, len) do { \
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iovp->iov_base = (ptr); \
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iovp->iov_len = (len); \
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uio.uio_resid += (len); \
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iovp++; \
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if (++uio.uio_iovcnt >= NIOV) { \
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if (__sprint(fp, &uio)) \
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goto error; \
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iovp = iov; \
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} \
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} while (0)
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#define PAD(howmany, with) do { \
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if ((n = (howmany)) > 0) { \
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while (n > PADSIZE) { \
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PRINT(with, PADSIZE); \
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n -= PADSIZE; \
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} \
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PRINT(with, n); \
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} \
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} while (0)
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#define FLUSH() do { \
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if (uio.uio_resid && __sprint(fp, &uio)) \
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goto error; \
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uio.uio_iovcnt = 0; \
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iovp = iov; \
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} while (0)
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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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((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \
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flags&LLONGINT ? GETARG(long long) : \
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flags&LONGINT ? GETARG(long) : \
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flags&PTRINT ? GETARG(ptrdiff_t) : \
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flags&SIZEINT ? GETARG(ssize_t) : \
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flags&SHORTINT ? (short)GETARG(int) : \
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flags&CHARINT ? (__signed char)GETARG(int) : \
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GETARG(int)))
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#define UARG() \
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((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \
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flags&LLONGINT ? GETARG(unsigned long long) : \
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flags&LONGINT ? GETARG(unsigned long) : \
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flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \
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flags&SIZEINT ? GETARG(size_t) : \
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flags&SHORTINT ? (unsigned short)GETARG(int) : \
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flags&CHARINT ? (unsigned char)GETARG(int) : \
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GETARG(unsigned int)))
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/*
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* Get * arguments, including the form *nn$. Preserve the nextarg
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* that the argument can be gotten once the type is determined.
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*/
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#define GETASTER(val) \
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n2 = 0; \
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cp = fmt; \
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while (is_digit(*cp)) { \
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n2 = 10 * n2 + to_digit(*cp); \
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cp++; \
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} \
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if (*cp == '$') { \
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int hold = nextarg; \
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if (argtable == NULL) { \
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argtable = statargtable; \
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__find_arguments(fmt0, orgap, &argtable, &argtablesiz); \
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} \
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nextarg = n2; \
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val = GETARG(int); \
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nextarg = hold; \
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fmt = ++cp; \
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} else { \
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val = GETARG(int); \
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}
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/*
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* Get the argument indexed by nextarg. If the argument table is
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* built, use it to get the argument. If its not, get the next
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* argument (and arguments must be gotten sequentially).
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*/
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#define GETARG(type) \
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(((argtable != NULL) ? (void)(ap = argtable[nextarg]) : (void)0), \
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nextarg++, va_arg(ap, type))
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_SET_ORIENTATION(fp, -1);
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/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
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if (cantwrite(fp)) {
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errno = EBADF;
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return (EOF);
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}
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/* optimise fprintf(stderr) (and other unbuffered Unix files) */
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if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
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fp->_file >= 0)
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return (__sbprintf(fp, fmt0, ap));
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fmt = (char *)fmt0;
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argtable = NULL;
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nextarg = 1;
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va_copy(orgap, ap);
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uio.uio_iov = iovp = iov;
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uio.uio_resid = 0;
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uio.uio_iovcnt = 0;
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ret = 0;
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memset(&ps, 0, sizeof(ps));
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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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cp = fmt;
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#if 1 /* BIONIC */
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n = -1;
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while ( (wc = *fmt) != 0 ) {
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if (wc == '%') {
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n = 1;
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break;
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}
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fmt++;
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}
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#else
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while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
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fmt += n;
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if (wc == '%') {
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fmt--;
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break;
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}
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}
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#endif
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if ((m = fmt - cp) != 0) {
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PRINT(cp, m);
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ret += m;
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}
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if (n <= 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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GETASTER(width);
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if (width >= 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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GETASTER(n);
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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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if (ch == '$') {
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nextarg = n;
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if (argtable == NULL) {
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argtable = statargtable;
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__find_arguments(fmt0, orgap,
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&argtable, &argtablesiz);
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}
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goto rflag;
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}
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prec = n < 0 ? -1 : n;
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goto reswitch;
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case '0':
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|
/*
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|
* ``Note that 0 is taken as a flag, not as the
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* beginning of a field width.''
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|
* -- ANSI X3J11
|
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*/
|
|
flags |= ZEROPAD;
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goto rflag;
|
|
case '1': case '2': case '3': case '4':
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|
case '5': case '6': case '7': case '8': case '9':
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n = 0;
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do {
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n = 10 * n + to_digit(ch);
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|
ch = *fmt++;
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} while (is_digit(ch));
|
|
if (ch == '$') {
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nextarg = n;
|
|
if (argtable == NULL) {
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argtable = statargtable;
|
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__find_arguments(fmt0, orgap,
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&argtable, &argtablesiz);
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|
}
|
|
goto rflag;
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|
}
|
|
width = n;
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|
goto reswitch;
|
|
#ifdef FLOATING_POINT
|
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case 'L':
|
|
flags |= LONGDBL;
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goto rflag;
|
|
#endif
|
|
case 'h':
|
|
flags |= SHORTINT;
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goto rflag;
|
|
case 'j':
|
|
flags |= MAXINT;
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|
goto rflag;
|
|
case 'l':
|
|
if (*fmt == 'l') {
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|
fmt++;
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flags |= LLONGINT;
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|
} else {
|
|
flags |= LONGINT;
|
|
}
|
|
goto rflag;
|
|
case 'q':
|
|
flags |= LLONGINT;
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|
goto rflag;
|
|
case 't':
|
|
flags |= PTRINT;
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|
goto rflag;
|
|
case 'z':
|
|
flags |= SIZEINT;
|
|
goto rflag;
|
|
case 'c':
|
|
*(cp = buf) = GETARG(int);
|
|
size = 1;
|
|
sign = '\0';
|
|
break;
|
|
case 'D':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
case 'i':
|
|
_umax = SARG();
|
|
if ((intmax_t)_umax < 0) {
|
|
_umax = -_umax;
|
|
sign = '-';
|
|
}
|
|
base = DEC;
|
|
goto number;
|
|
#ifdef FLOATING_POINT
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
if (prec == -1) {
|
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prec = DEFPREC;
|
|
} else if ((ch == 'g' || ch == 'G') && prec == 0) {
|
|
prec = 1;
|
|
}
|
|
|
|
if (flags & LONGDBL) {
|
|
_double = (double) GETARG(long double);
|
|
} else {
|
|
_double = GETARG(double);
|
|
}
|
|
|
|
/* do this before tricky precision changes */
|
|
if (_my_isinf(_double)) {
|
|
if (_double < 0)
|
|
sign = '-';
|
|
cp = "Inf";
|
|
size = 3;
|
|
break;
|
|
}
|
|
if (_my_isnan(_double)) {
|
|
cp = "NaN";
|
|
size = 3;
|
|
break;
|
|
}
|
|
|
|
flags |= FPT;
|
|
cp = cvt(_double, prec, flags, &softsign,
|
|
&expt, ch, &ndig);
|
|
cp_free = cp;
|
|
if (ch == 'g' || ch == 'G') {
|
|
if (expt <= -4 || expt > prec)
|
|
ch = (ch == 'g') ? 'e' : 'E';
|
|
else
|
|
ch = 'g';
|
|
}
|
|
if (ch <= 'e') { /* 'e' or 'E' fmt */
|
|
--expt;
|
|
expsize = exponent(expstr, expt, ch);
|
|
size = expsize + ndig;
|
|
if (ndig > 1 || flags & ALT)
|
|
++size;
|
|
} else if (ch == 'f') { /* f fmt */
|
|
if (expt > 0) {
|
|
size = expt;
|
|
if (prec || flags & ALT)
|
|
size += prec + 1;
|
|
} else /* "0.X" */
|
|
size = prec + 2;
|
|
} else if (expt >= ndig) { /* fixed g fmt */
|
|
size = expt;
|
|
if (flags & ALT)
|
|
++size;
|
|
} else
|
|
size = ndig + (expt > 0 ?
|
|
1 : 2 - expt);
|
|
|
|
if (softsign)
|
|
sign = '-';
|
|
break;
|
|
#endif /* FLOATING_POINT */
|
|
/* the Android security team suggests removing support for %n
|
|
* since it has no real practical value, and could lead to
|
|
* running malicious code (for really bugy programs that
|
|
* send to printf() user-generated formatting strings).
|
|
*/
|
|
#if 0
|
|
case 'n':
|
|
if (flags & LLONGINT)
|
|
*GETARG(long long *) = ret;
|
|
else if (flags & LONGINT)
|
|
*GETARG(long *) = ret;
|
|
else if (flags & SHORTINT)
|
|
*GETARG(short *) = ret;
|
|
else if (flags & CHARINT)
|
|
*GETARG(__signed char *) = ret;
|
|
else if (flags & PTRINT)
|
|
*GETARG(ptrdiff_t *) = ret;
|
|
else if (flags & SIZEINT)
|
|
*GETARG(ssize_t *) = ret;
|
|
else if (flags & MAXINT)
|
|
*GETARG(intmax_t *) = ret;
|
|
else
|
|
*GETARG(int *) = ret;
|
|
continue; /* no output */
|
|
#endif
|
|
case 'O':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'o':
|
|
_umax = 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 */
|
|
_umax = (u_long)GETARG(void *);
|
|
base = HEX;
|
|
xdigs = "0123456789abcdef";
|
|
flags |= HEXPREFIX;
|
|
ch = 'x';
|
|
goto nosign;
|
|
case 's':
|
|
if ((cp = GETARG(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':
|
|
_umax = UARG();
|
|
base = DEC;
|
|
goto nosign;
|
|
case 'X':
|
|
xdigs = "0123456789ABCDEF";
|
|
goto hex;
|
|
case 'x':
|
|
xdigs = "0123456789abcdef";
|
|
hex: _umax = UARG();
|
|
base = HEX;
|
|
/* leading 0x/X only if non-zero */
|
|
if (flags & ALT && _umax != 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 + BUF;
|
|
if (_umax != 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(_umax & 7);
|
|
_umax >>= 3;
|
|
} while (_umax);
|
|
/* handle octal leading 0 */
|
|
if (flags & ALT && *cp != '0')
|
|
*--cp = '0';
|
|
break;
|
|
|
|
case DEC:
|
|
/* many numbers are 1 digit */
|
|
while (_umax >= 10) {
|
|
*--cp = to_char(_umax % 10);
|
|
_umax /= 10;
|
|
}
|
|
*--cp = to_char(_umax);
|
|
break;
|
|
|
|
case HEX:
|
|
do {
|
|
*--cp = xdigs[_umax & 15];
|
|
_umax >>= 4;
|
|
} while (_umax);
|
|
break;
|
|
|
|
default:
|
|
cp = "bug in vfprintf: bad base";
|
|
size = strlen(cp);
|
|
goto skipsize;
|
|
}
|
|
}
|
|
size = buf + BUF - 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;
|
|
|
|
/* right-adjusting blank padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == 0)
|
|
PAD(width - realsz, blanks);
|
|
|
|
/* prefix */
|
|
if (sign) {
|
|
PRINT(&sign, 1);
|
|
} else if (flags & HEXPREFIX) {
|
|
ox[0] = '0';
|
|
ox[1] = ch;
|
|
PRINT(ox, 2);
|
|
}
|
|
|
|
/* right-adjusting zero padding */
|
|
if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
|
|
PAD(width - realsz, zeroes);
|
|
|
|
/* leading zeroes from decimal precision */
|
|
PAD(dprec - size, zeroes);
|
|
|
|
/* the string or number proper */
|
|
#ifdef FLOATING_POINT
|
|
if ((flags & FPT) == 0) {
|
|
PRINT(cp, size);
|
|
} else { /* glue together f_p fragments */
|
|
if (ch >= 'f') { /* 'f' or 'g' */
|
|
if (_double == 0) {
|
|
/* kludge for __dtoa irregularity */
|
|
PRINT("0", 1);
|
|
if (expt < ndig || (flags & ALT) != 0) {
|
|
PRINT(decimal_point, 1);
|
|
PAD(ndig - 1, zeroes);
|
|
}
|
|
} else if (expt <= 0) {
|
|
PRINT("0", 1);
|
|
PRINT(decimal_point, 1);
|
|
PAD(-expt, zeroes);
|
|
PRINT(cp, ndig);
|
|
} else if (expt >= ndig) {
|
|
PRINT(cp, ndig);
|
|
PAD(expt - ndig, zeroes);
|
|
if (flags & ALT)
|
|
PRINT(".", 1);
|
|
} else {
|
|
PRINT(cp, expt);
|
|
cp += expt;
|
|
PRINT(".", 1);
|
|
PRINT(cp, ndig-expt);
|
|
}
|
|
} else { /* 'e' or 'E' */
|
|
if (ndig > 1 || flags & ALT) {
|
|
ox[0] = *cp++;
|
|
ox[1] = '.';
|
|
PRINT(ox, 2);
|
|
if (_double) {
|
|
PRINT(cp, ndig-1);
|
|
} else /* 0.[0..] */
|
|
/* __dtoa irregularity */
|
|
PAD(ndig - 1, zeroes);
|
|
} else /* XeYYY */
|
|
PRINT(cp, 1);
|
|
PRINT(expstr, expsize);
|
|
}
|
|
}
|
|
#else
|
|
PRINT(cp, size);
|
|
#endif
|
|
/* left-adjusting padding (always blank) */
|
|
if (flags & LADJUST)
|
|
PAD(width - realsz, blanks);
|
|
|
|
/* finally, adjust ret */
|
|
ret += width > realsz ? width : realsz;
|
|
|
|
FLUSH(); /* copy out the I/O vectors */
|
|
#if 1 /* BIONIC: remove memory leak when printing doubles */
|
|
if (cp_free) {
|
|
free(cp_free);
|
|
cp_free = NULL;
|
|
}
|
|
#endif
|
|
}
|
|
done:
|
|
FLUSH();
|
|
error:
|
|
#if 1 /* BIONIC: remove memory leak when printing doubles */
|
|
if (cp_free) {
|
|
free(cp_free);
|
|
cp_free = NULL;
|
|
}
|
|
#endif
|
|
if (argtable != NULL && argtable != statargtable) {
|
|
munmap(argtable, argtablesiz);
|
|
argtable = NULL;
|
|
}
|
|
return (__sferror(fp) ? EOF : ret);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* Type ids for argument type table.
|
|
*/
|
|
#define T_UNUSED 0
|
|
#define T_SHORT 1
|
|
#define T_U_SHORT 2
|
|
#define TP_SHORT 3
|
|
#define T_INT 4
|
|
#define T_U_INT 5
|
|
#define TP_INT 6
|
|
#define T_LONG 7
|
|
#define T_U_LONG 8
|
|
#define TP_LONG 9
|
|
#define T_LLONG 10
|
|
#define T_U_LLONG 11
|
|
#define TP_LLONG 12
|
|
#define T_DOUBLE 13
|
|
#define T_LONG_DOUBLE 14
|
|
#define TP_CHAR 15
|
|
#define TP_VOID 16
|
|
#define T_PTRINT 17
|
|
#define TP_PTRINT 18
|
|
#define T_SIZEINT 19
|
|
#define T_SSIZEINT 20
|
|
#define TP_SSIZEINT 21
|
|
#define T_MAXINT 22
|
|
#define T_MAXUINT 23
|
|
#define TP_MAXINT 24
|
|
|
|
/*
|
|
* Find all arguments when a positional parameter is encountered. Returns a
|
|
* table, indexed by argument number, of pointers to each arguments. The
|
|
* initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
|
|
* It will be replaced with a mmap-ed one if it overflows (malloc cannot be
|
|
* used since we are attempting to make snprintf thread safe, and alloca is
|
|
* problematic since we have nested functions..)
|
|
*/
|
|
static void
|
|
__find_arguments(const char *fmt0, va_list ap, va_list **argtable,
|
|
size_t *argtablesiz)
|
|
{
|
|
char *fmt; /* format string */
|
|
int ch; /* character from fmt */
|
|
int n, n2; /* handy integer (short term usage) */
|
|
char *cp; /* handy char pointer (short term usage) */
|
|
int flags; /* flags as above */
|
|
unsigned char *typetable; /* table of types */
|
|
unsigned char stattypetable[STATIC_ARG_TBL_SIZE];
|
|
int tablesize; /* current size of type table */
|
|
int tablemax; /* largest used index in table */
|
|
int nextarg; /* 1-based argument index */
|
|
wchar_t wc;
|
|
void* ps;
|
|
|
|
/*
|
|
* Add an argument type to the table, expanding if necessary.
|
|
*/
|
|
#define ADDTYPE(type) \
|
|
((nextarg >= tablesize) ? \
|
|
__grow_type_table(&typetable, &tablesize) : 0, \
|
|
(nextarg > tablemax) ? tablemax = nextarg : 0, \
|
|
typetable[nextarg++] = type)
|
|
|
|
#define ADDSARG() \
|
|
((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \
|
|
((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \
|
|
((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \
|
|
((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
|
|
((flags&LONGINT) ? ADDTYPE(T_LONG) : \
|
|
((flags&SHORTINT) ? ADDTYPE(T_SHORT) : ADDTYPE(T_INT)))))))
|
|
|
|
#define ADDUARG() \
|
|
((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \
|
|
((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \
|
|
((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \
|
|
((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
|
|
((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \
|
|
((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : ADDTYPE(T_U_INT)))))))
|
|
|
|
/*
|
|
* Add * arguments to the type array.
|
|
*/
|
|
#define ADDASTER() \
|
|
n2 = 0; \
|
|
cp = fmt; \
|
|
while (is_digit(*cp)) { \
|
|
n2 = 10 * n2 + to_digit(*cp); \
|
|
cp++; \
|
|
} \
|
|
if (*cp == '$') { \
|
|
int hold = nextarg; \
|
|
nextarg = n2; \
|
|
ADDTYPE(T_INT); \
|
|
nextarg = hold; \
|
|
fmt = ++cp; \
|
|
} else { \
|
|
ADDTYPE(T_INT); \
|
|
}
|
|
fmt = (char *)fmt0;
|
|
typetable = stattypetable;
|
|
tablesize = STATIC_ARG_TBL_SIZE;
|
|
tablemax = 0;
|
|
nextarg = 1;
|
|
memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
|
|
memset(&ps, 0, sizeof(ps));
|
|
|
|
/*
|
|
* Scan the format for conversions (`%' character).
|
|
*/
|
|
for (;;) {
|
|
cp = fmt;
|
|
#if 1 /* BIONIC */
|
|
n = -1;
|
|
while ((wc = *fmt) != 0) {
|
|
if (wc == '%') {
|
|
n = 1;
|
|
break;
|
|
}
|
|
fmt++;
|
|
}
|
|
#else
|
|
while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
|
|
fmt += n;
|
|
if (wc == '%') {
|
|
fmt--;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
if (n <= 0)
|
|
goto done;
|
|
fmt++; /* skip over '%' */
|
|
|
|
flags = 0;
|
|
|
|
rflag: ch = *fmt++;
|
|
reswitch: switch (ch) {
|
|
case ' ':
|
|
case '#':
|
|
goto rflag;
|
|
case '*':
|
|
ADDASTER();
|
|
goto rflag;
|
|
case '-':
|
|
case '+':
|
|
goto rflag;
|
|
case '.':
|
|
if ((ch = *fmt++) == '*') {
|
|
ADDASTER();
|
|
goto rflag;
|
|
}
|
|
while (is_digit(ch)) {
|
|
ch = *fmt++;
|
|
}
|
|
goto reswitch;
|
|
case '0':
|
|
goto rflag;
|
|
case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
n = 0;
|
|
do {
|
|
n = 10 * n + to_digit(ch);
|
|
ch = *fmt++;
|
|
} while (is_digit(ch));
|
|
if (ch == '$') {
|
|
nextarg = n;
|
|
goto rflag;
|
|
}
|
|
goto reswitch;
|
|
#ifdef FLOATING_POINT
|
|
case 'L':
|
|
flags |= LONGDBL;
|
|
goto rflag;
|
|
#endif
|
|
case 'h':
|
|
if (*fmt == 'h') {
|
|
fmt++;
|
|
flags |= CHARINT;
|
|
} else {
|
|
flags |= SHORTINT;
|
|
}
|
|
goto rflag;
|
|
case 'l':
|
|
if (*fmt == 'l') {
|
|
fmt++;
|
|
flags |= LLONGINT;
|
|
} else {
|
|
flags |= LONGINT;
|
|
}
|
|
goto rflag;
|
|
case 'q':
|
|
flags |= LLONGINT;
|
|
goto rflag;
|
|
case 't':
|
|
flags |= PTRINT;
|
|
goto rflag;
|
|
case 'z':
|
|
flags |= SIZEINT;
|
|
goto rflag;
|
|
case 'c':
|
|
ADDTYPE(T_INT);
|
|
break;
|
|
case 'D':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'd':
|
|
case 'i':
|
|
ADDSARG();
|
|
break;
|
|
#ifdef FLOATING_POINT
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
if (flags & LONGDBL)
|
|
ADDTYPE(T_LONG_DOUBLE);
|
|
else
|
|
ADDTYPE(T_DOUBLE);
|
|
break;
|
|
#endif /* FLOATING_POINT */
|
|
case 'n':
|
|
if (flags & LLONGINT)
|
|
ADDTYPE(TP_LLONG);
|
|
else if (flags & LONGINT)
|
|
ADDTYPE(TP_LONG);
|
|
else if (flags & SHORTINT)
|
|
ADDTYPE(TP_SHORT);
|
|
else if (flags & PTRINT)
|
|
ADDTYPE(TP_PTRINT);
|
|
else if (flags & SIZEINT)
|
|
ADDTYPE(TP_SSIZEINT);
|
|
else if (flags & MAXINT)
|
|
ADDTYPE(TP_MAXINT);
|
|
else
|
|
ADDTYPE(TP_INT);
|
|
continue; /* no output */
|
|
case 'O':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'o':
|
|
ADDUARG();
|
|
break;
|
|
case 'p':
|
|
ADDTYPE(TP_VOID);
|
|
break;
|
|
case 's':
|
|
ADDTYPE(TP_CHAR);
|
|
break;
|
|
case 'U':
|
|
flags |= LONGINT;
|
|
/*FALLTHROUGH*/
|
|
case 'u':
|
|
case 'X':
|
|
case 'x':
|
|
ADDUARG();
|
|
break;
|
|
default: /* "%?" prints ?, unless ? is NUL */
|
|
if (ch == '\0')
|
|
goto done;
|
|
break;
|
|
}
|
|
}
|
|
done:
|
|
/*
|
|
* Build the argument table.
|
|
*/
|
|
if (tablemax >= STATIC_ARG_TBL_SIZE) {
|
|
*argtablesiz = sizeof (va_list) * (tablemax + 1);
|
|
*argtable = (va_list *)mmap(NULL, *argtablesiz,
|
|
PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0);
|
|
}
|
|
|
|
#if 0
|
|
/* XXX is this required? */
|
|
(*argtable) [0] = NULL;
|
|
#endif
|
|
for (n = 1; n <= tablemax; n++) {
|
|
va_copy((*argtable)[n], ap);
|
|
switch (typetable[n]) {
|
|
case T_UNUSED:
|
|
(void) va_arg(ap, int);
|
|
break;
|
|
case T_SHORT:
|
|
(void) va_arg(ap, int);
|
|
break;
|
|
case T_U_SHORT:
|
|
(void) va_arg(ap, int);
|
|
break;
|
|
case TP_SHORT:
|
|
(void) va_arg(ap, short *);
|
|
break;
|
|
case T_INT:
|
|
(void) va_arg(ap, int);
|
|
break;
|
|
case T_U_INT:
|
|
(void) va_arg(ap, unsigned int);
|
|
break;
|
|
case TP_INT:
|
|
(void) va_arg(ap, int *);
|
|
break;
|
|
case T_LONG:
|
|
(void) va_arg(ap, long);
|
|
break;
|
|
case T_U_LONG:
|
|
(void) va_arg(ap, unsigned long);
|
|
break;
|
|
case TP_LONG:
|
|
(void) va_arg(ap, long *);
|
|
break;
|
|
case T_LLONG:
|
|
(void) va_arg(ap, long long);
|
|
break;
|
|
case T_U_LLONG:
|
|
(void) va_arg(ap, unsigned long long);
|
|
break;
|
|
case TP_LLONG:
|
|
(void) va_arg(ap, long long *);
|
|
break;
|
|
case T_DOUBLE:
|
|
(void) va_arg(ap, double);
|
|
break;
|
|
case T_LONG_DOUBLE:
|
|
(void) va_arg(ap, long double);
|
|
break;
|
|
case TP_CHAR:
|
|
(void) va_arg(ap, char *);
|
|
break;
|
|
case TP_VOID:
|
|
(void) va_arg(ap, void *);
|
|
break;
|
|
case T_PTRINT:
|
|
(void) va_arg(ap, ptrdiff_t);
|
|
break;
|
|
case TP_PTRINT:
|
|
(void) va_arg(ap, ptrdiff_t *);
|
|
break;
|
|
case T_SIZEINT:
|
|
(void) va_arg(ap, size_t);
|
|
break;
|
|
case T_SSIZEINT:
|
|
(void) va_arg(ap, ssize_t);
|
|
break;
|
|
case TP_SSIZEINT:
|
|
(void) va_arg(ap, ssize_t *);
|
|
break;
|
|
case TP_MAXINT:
|
|
(void) va_arg(ap, intmax_t *);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (typetable != NULL && typetable != stattypetable) {
|
|
munmap(typetable, *argtablesiz);
|
|
typetable = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Increase the size of the type table.
|
|
*/
|
|
static int
|
|
__grow_type_table(unsigned char **typetable, int *tablesize)
|
|
{
|
|
unsigned char *oldtable = *typetable;
|
|
int newsize = *tablesize * 2;
|
|
|
|
if (*tablesize == STATIC_ARG_TBL_SIZE) {
|
|
*typetable = (unsigned char *)mmap(NULL,
|
|
sizeof (unsigned char) * newsize, PROT_WRITE|PROT_READ,
|
|
MAP_ANON|MAP_PRIVATE, -1, 0);
|
|
/* XXX unchecked */
|
|
memcpy( *typetable, oldtable, *tablesize);
|
|
} else {
|
|
unsigned char *new = (unsigned char *)mmap(NULL,
|
|
sizeof (unsigned char) * newsize, PROT_WRITE|PROT_READ,
|
|
MAP_ANON|MAP_PRIVATE, -1, 0);
|
|
memmove(new, *typetable, *tablesize);
|
|
munmap(*typetable, *tablesize);
|
|
*typetable = new;
|
|
/* XXX unchecked */
|
|
}
|
|
memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize));
|
|
|
|
*tablesize = newsize;
|
|
return(0);
|
|
}
|
|
|
|
|
|
#ifdef FLOATING_POINT
|
|
|
|
extern char *__dtoa(double, int, int, int *, int *, char **);
|
|
|
|
static char *
|
|
cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch,
|
|
int *length)
|
|
{
|
|
int mode, dsgn;
|
|
char *digits, *bp, *rve;
|
|
|
|
if (ch == 'f') {
|
|
mode = 3; /* ndigits after the decimal point */
|
|
} else {
|
|
/* To obtain ndigits after the decimal point for the 'e'
|
|
* and 'E' formats, round to ndigits + 1 significant
|
|
* figures.
|
|
*/
|
|
if (ch == 'e' || ch == 'E') {
|
|
ndigits++;
|
|
}
|
|
mode = 2; /* ndigits significant digits */
|
|
}
|
|
|
|
if (value < 0) {
|
|
value = -value;
|
|
*sign = '-';
|
|
} else
|
|
*sign = '\000';
|
|
digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
|
|
if ((ch != 'g' && ch != 'G') || flags & ALT) { /* Print trailing zeros */
|
|
bp = digits + ndigits;
|
|
if (ch == 'f') {
|
|
if (*digits == '0' && value)
|
|
*decpt = -ndigits + 1;
|
|
bp += *decpt;
|
|
}
|
|
if (value == 0) /* kludge for __dtoa irregularity */
|
|
rve = bp;
|
|
while (rve < bp)
|
|
*rve++ = '0';
|
|
}
|
|
*length = rve - digits;
|
|
return (digits);
|
|
}
|
|
|
|
static int
|
|
exponent(char *p0, int exp, int fmtch)
|
|
{
|
|
char *p, *t;
|
|
char expbuf[MAXEXP];
|
|
|
|
p = p0;
|
|
*p++ = fmtch;
|
|
if (exp < 0) {
|
|
exp = -exp;
|
|
*p++ = '-';
|
|
}
|
|
else
|
|
*p++ = '+';
|
|
t = expbuf + MAXEXP;
|
|
if (exp > 9) {
|
|
do {
|
|
*--t = to_char(exp % 10);
|
|
} while ((exp /= 10) > 9);
|
|
*--t = to_char(exp);
|
|
for (; t < expbuf + MAXEXP; *p++ = *t++);
|
|
}
|
|
else {
|
|
*p++ = '0';
|
|
*p++ = to_char(exp);
|
|
}
|
|
return (p - p0);
|
|
}
|
|
|
|
|
|
/* BIONIC */
|
|
#include <machine/ieee.h>
|
|
typedef union {
|
|
double d;
|
|
struct ieee_double i;
|
|
} ieee_u;
|
|
|
|
static int
|
|
_my_isinf (double value)
|
|
{
|
|
ieee_u u;
|
|
|
|
u.d = value;
|
|
return (u.i.dbl_exp == 2047 && u.i.dbl_frach == 0 && u.i.dbl_fracl == 0);
|
|
}
|
|
|
|
static int
|
|
_my_isnan (double value)
|
|
{
|
|
ieee_u u;
|
|
|
|
u.d = value;
|
|
return (u.i.dbl_exp == 2047 && (u.i.dbl_frach != 0 || u.i.dbl_fracl != 0));
|
|
}
|
|
#endif /* FLOATING_POINT */
|