179 lines
6.1 KiB
C
179 lines
6.1 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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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* and/or other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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 VFSCANF_LOCAL
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#define VFSCANF_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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#ifdef STRING_ONLY
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#undef _newlib_flockfile_start
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#undef _newlib_flockfile_exit
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#undef _newlib_flockfile_end
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#define _newlib_flockfile_start(x) {}
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#define _newlib_flockfile_exit(x) {}
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#define _newlib_flockfile_end(x) {}
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#define _ungetc_r _sungetc_r
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#define __srefill_r __ssrefill_r
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#endif
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#ifdef FLOATING_POINT
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#include <math.h>
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#include <float.h>
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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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#include "floatio.h"
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#if ((MAXEXP+MAXFRACT+3) > MB_LEN_MAX)
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/* "3 = sign + decimal point + NUL". */
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# define BUF (MAXEXP+MAXFRACT+3)
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#else
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# define BUF MB_LEN_MAX
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#endif
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/* An upper bound for how long a long prints in decimal. 4 / 13 approximates
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log (2). Add one char for roundoff compensation and one for the sign. */
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#define MAX_LONG_LEN ((CHAR_BIT * sizeof (long) - 1) * 4 / 13 + 2)
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#else
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#define BUF 40
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#endif
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#define _NO_LONGLONG
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#undef _WANT_IO_C99_FORMATS
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#undef _WANT_IO_POS_ARGS
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#define _NO_POS_ARGS
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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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/*
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* Flags used during conversion.
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*/
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#define SHORT 0x01 /* "h": short. */
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#define LONG 0x02 /* "l": long or double. */
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#define LONGDBL 0x04 /* "L/ll": long double or long long. */
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#define CHAR 0x08 /* "hh": 8 bit integer. */
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#define SUPPRESS 0x10 /* Suppress assignment. */
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#define POINTER 0x20 /* Weird %p pointer (`fake hex'). */
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#define NOSKIP 0x40 /* Do not skip blanks */
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/* The following are used in numeric conversions only:
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SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
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SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral. */
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#define SIGNOK 0x80 /* "+/-" is (still) legal. */
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#define NDIGITS 0x100 /* No digits detected. */
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#define DPTOK 0x200 /* (Float) decimal point is still legal. */
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#define EXPOK 0x400 /* (Float) exponent (e+3, etc) still legal. */
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#define PFXOK 0x200 /* "0x" prefix is (still) legal. */
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#define NZDIGITS 0x400 /* No zero digits detected. */
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#define NNZDIGITS 0x800 /* No non-zero digits detected. */
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/* Conversion types. */
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#define CT_CHAR 0 /* "%c" conversion. */
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#define CT_CCL 1 /* "%[...]" conversion. */
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#define CT_STRING 2 /* "%s" conversion. */
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#define CT_INT 3 /* Integer, i.e., strtol. */
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#define CT_UINT 4 /* Unsigned integer, i.e., strtoul. */
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#define CT_FLOAT 5 /* Floating, i.e., strtod. */
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#define u_char unsigned char
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#define u_long unsigned long
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/* Macro to support positional arguments. */
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#define GET_ARG(n, ap, type) (va_arg ((ap), type))
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#define MATCH_FAILURE 1
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#define INPUT_FAILURE 2
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/* All data needed to decode format string are kept in below struct. */
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struct _scan_data_t
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{
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int flags; /* Flags. */
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int base; /* Base. */
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size_t width; /* Width. */
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int nassigned; /* Number of assignments so far. */
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int nread; /* Number of chars read so far. */
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char *ccltab; /* Table used for [ format. */
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int code; /* Current conversion specifier. */
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char buf[BUF]; /* Internal buffer for scan. */
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/* Internal buffer for scan. */
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int (*pfn_ungetc)(struct _reent*, int, FILE*);
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/* Internal buffer for scan. */
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int (*pfn_refill)(struct _reent*, FILE*);
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};
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extern int
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_scanf_chars (struct _reent *rptr,
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struct _scan_data_t *pdata,
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FILE *fp, va_list *ap);
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extern int
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_scanf_i (struct _reent *rptr,
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struct _scan_data_t *pdata,
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FILE *fp, va_list *ap);
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/* Make _scanf_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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_scanf_float (struct _reent *rptr,
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struct _scan_data_t *pdata,
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FILE *fp, va_list *ap) _ATTRIBUTE((__weak__));
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#endif
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