235 lines
9.0 KiB
C
235 lines
9.0 KiB
C
/*
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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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* Copyright (c) 2012-2014 ARM Ltd
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* All rights reserved.
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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. The name of the company may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef VFPRINTF_LOCAL
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#define VFPRINTF_LOCAL
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#ifndef NO_FLOATING_POINT
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# define FLOATING_POINT
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#endif
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#define _NO_POS_ARGS
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#undef _WANT_IO_C99_FORMATS
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/* Currently a test is made to see if long double processing is warranted.
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This could be changed in the future should the _ldtoa_r code be
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preferred over _dtoa_r. */
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#define _NO_LONGDBL
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#define _NO_LONGLONG
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#define _PRINTF_FLOAT_TYPE double
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#if defined (FLOATING_POINT)
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# include <locale.h>
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#endif
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#ifdef FLOATING_POINT
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# include <math.h>
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/* For %La, an exponent of 15 bits occupies the exponent character,
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a sign, and up to 5 digits. */
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# define MAXEXPLEN 7
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# define DEFPREC 6
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extern char *_dtoa_r (struct _reent *, double, int,
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int, int *, int *, char **);
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# define _DTOA_R _dtoa_r
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# define FREXP frexp
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#endif /* FLOATING_POINT. */
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/* BUF must be big enough for the maximum %#llo (assuming long long is
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at most 64 bits, this would be 23 characters), the maximum
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multibyte character %C, and the maximum default precision of %La
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(assuming long double is at most 128 bits with 113 bits of
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mantissa, this would be 29 characters). %e, %f, and %g use
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reentrant storage shared with mprec. All other formats that use
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buf get by with fewer characters. Making BUF slightly bigger
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reduces the need for malloc in %.*a and %S, when large precision or
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long strings are processed.
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The bigger size of 100 bytes is used on systems which allow number
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strings using the locale's grouping character. Since that's a multibyte
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value, we should use a conservative value. */
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#define BUF 40
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#define quad_t long
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#define u_quad_t unsigned long
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typedef quad_t * quad_ptr_t;
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typedef _PTR void_ptr_t;
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typedef char * char_ptr_t;
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typedef long * long_ptr_t;
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typedef int * int_ptr_t;
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typedef short * short_ptr_t;
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/* Macros for converting digits to letters and vice versa. */
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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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/* Flags used during conversion. */
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#define ALT 0x001 /* Alternate form. */
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#define LADJUST 0x002 /* Left adjustment. */
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#define ZEROPAD 0x004 /* Zero (as opposed to blank) pad. */
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#define PLUSSGN 0x008 /* Plus sign flag. */
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#define SPACESGN 0x010 /* Space flag. */
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#define HEXPREFIX 0x020 /* Add 0x or 0X prefix. */
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#define SHORTINT 0x040 /* Short integer. */
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#define LONGINT 0x080 /* Long integer. */
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#define LONGDBL 0x100 /* Long double. */
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/* ifdef _NO_LONGLONG, make QUADINT equivalent to LONGINT, so
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that %lld behaves the same as %ld, not as %d, as expected if:
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sizeof (long long) = sizeof long > sizeof int. */
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#define QUADINT LONGINT
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#define FPT 0x400 /* Floating point number. */
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/* Define as 0, to make SARG and UARG occupy fewer instructions. */
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# define CHARINT 0
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/* Macros to support positional arguments. */
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#define GET_ARG(n, ap, type) (va_arg ((ap), type))
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/* To extend shorts properly, we need both signed and unsigned
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argument extraction methods. Also they should be used in nano-vfprintf_i.c
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and nano-vfprintf_float.c only, since ap is a pointer to va_list. */
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#define SARG(flags) \
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(flags&LONGINT ? GET_ARG (N, (*ap), long) : \
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flags&SHORTINT ? (long)(short)GET_ARG (N, (*ap), int) : \
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flags&CHARINT ? (long)(signed char)GET_ARG (N, (*ap), int) : \
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(long)GET_ARG (N, (*ap), int))
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#define UARG(flags) \
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(flags&LONGINT ? GET_ARG (N, (*ap), u_long) : \
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flags&SHORTINT ? (u_long)(u_short)GET_ARG (N, (*ap), int) : \
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flags&CHARINT ? (u_long)(unsigned char)GET_ARG (N, (*ap), int) : \
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(u_long)GET_ARG (N, (*ap), u_int))
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/* BEWARE, these `goto error' on error. And they are used
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in more than one functions.
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Following macros are each referred about twice in printf for integer,
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so it is not worth to rewrite them into functions. This situation may
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change in the future. */
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#define PRINT(ptr, len) { \
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if (pfunc (data, fp, (ptr), (len)) == EOF) \
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goto error; \
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}
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#define PAD(howmany, ch) { \
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int temp_i = 0; \
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while (temp_i < (howmany)) \
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{ \
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if (pfunc (data, fp, &(ch), 1) == EOF) \
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goto error; \
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temp_i++; \
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} \
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}
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#define PRINTANDPAD(p, ep, len, ch) { \
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int temp_n = (ep) - (p); \
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if (temp_n > (len)) \
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temp_n = (len); \
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if (temp_n > 0) \
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PRINT((p), temp_n); \
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PAD((len) - (temp_n > 0 ? temp_n : 0), (ch)); \
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}
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/* All data needed to decode format string are kept in below struct. */
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struct _prt_data_t
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{
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int flags; /* Flags. */
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int prec; /* Precision. */
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int dprec; /* Decimal precision. */
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int width; /* Width. */
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int size; /* Size of converted field or string. */
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int ret; /* Return value accumulator. */
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char code; /* Current conversion specifier. */
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char blank; /* Blank character. */
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char zero; /* Zero character. */
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char buf[BUF]; /* Output buffer for non-floating point number. */
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char l_buf[3]; /* Sign&hex_prefix, "+/-" and "0x/X". */
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#ifdef FLOATING_POINT
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_PRINTF_FLOAT_TYPE _double_; /* Double value. */
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char expstr[MAXEXPLEN]; /* Buffer for exponent string. */
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int lead; /* The sig figs before decimal or group sep. */
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#endif
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};
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extern int
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_printf_common (struct _reent *data,
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struct _prt_data_t *pdata,
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int *realsz,
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FILE *fp,
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int (*pfunc)(struct _reent *, FILE *,
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const char *, size_t len));
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extern int
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_printf_i (struct _reent *data, struct _prt_data_t *pdata, FILE *fp,
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int (*pfunc)(struct _reent *, FILE *, const char *, size_t len),
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va_list *ap);
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/* Make _printf_float weak symbol, so it won't be linked in if target program
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does not need it. */
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extern int
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_printf_float (struct _reent *data,
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struct _prt_data_t *pdata,
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FILE *fp,
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int (*pfunc)(struct _reent *, FILE *,
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const char *, size_t len),
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va_list *ap) _ATTRIBUTE((__weak__));
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#endif
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