newlib/libc/stdio/nano-vfscanf_local.h

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * and/or other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17
  18 /*
  19  * Copyright (c) 2012-2014 ARM Ltd
  20  * All rights reserved.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the above copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. The name of the company may not be used to endorse or promote
  31  *    products derived from this software without specific prior written
  32  *    permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
  35  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  36  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  37  * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  38  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  39  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  40  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  41  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  42  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  43  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  44  */
  45
  46 #ifndef VFSCANF_LOCAL
  47 #define VFSCANF_LOCAL
  48
  49 #ifndef NO_FLOATING_POINT
  50 #define FLOATING_POINT
  51 #endif
  52
  53 #ifdef STRING_ONLY
  54 #undef _newlib_flockfile_start
  55 #undef _newlib_flockfile_exit
  56 #undef _newlib_flockfile_end
  57 #define _newlib_flockfile_start(x) {}
  58 #define _newlib_flockfile_exit(x) {}
  59 #define _newlib_flockfile_end(x) {}
  60 #define _ungetc_r _sungetc_r
  61 #define __srefill_r __ssrefill_r
  62 #endif
  63
  64 #ifdef FLOATING_POINT
  65 #include <math.h>
  66 #include <float.h>
  67
  68 /* Currently a test is made to see if long double processing is warranted.
  69    This could be changed in the future should the _ldtoa_r code be
  70    preferred over _dtoa_r.  */
  71 #define _NO_LONGDBL
  72
  73 #include "floatio.h"
  74
  75 #if ((MAXEXP+MAXFRACT+3) > MB_LEN_MAX)
  76 /* "3 = sign + decimal point + NUL".  */
  77 # define BUF (MAXEXP+MAXFRACT+3)
  78 #else
  79 # define BUF MB_LEN_MAX
  80 #endif
  81
  82 /* An upper bound for how long a long prints in decimal.  4 / 13 approximates
  83    log (2).  Add one char for roundoff compensation and one for the sign.  */
  84 #define MAX_LONG_LEN ((CHAR_BIT * sizeof (long)  - 1) * 4 / 13 + 2)
  85 #else
  86 #define BUF     40
  87 #endif
  88
  89
  90 #define _NO_LONGLONG
  91 #undef _WANT_IO_C99_FORMATS
  92 #undef _WANT_IO_POS_ARGS
  93
  94 #define _NO_POS_ARGS
  95
  96 /* Macros for converting digits to letters and vice versa.  */
  97 #define to_digit(c)     ((c) - '0')
  98 #define is_digit(c)     ((unsigned)to_digit (c) <= 9)
  99 #define to_char(n)      ((n) + '0')
 100
 101 /*
 102  * Flags used during conversion.
 103  */
 104
 105 #define SHORT           0x01    /* "h": short.  */
 106 #define LONG            0x02    /* "l": long or double.  */
 107 #define LONGDBL         0x04    /* "L/ll": long double or long long.  */
 108 #define CHAR            0x08    /* "hh": 8 bit integer.  */
 109 #define SUPPRESS        0x10    /* Suppress assignment.  */
 110 #define POINTER         0x20    /* Weird %p pointer (`fake hex').  */
 111 #define NOSKIP          0x40    /* Do not skip blanks */
 112
 113 /* The following are used in numeric conversions only:
 114    SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
 115    SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral.  */
 116
 117 #define SIGNOK          0x80    /* "+/-" is (still) legal.  */
 118 #define NDIGITS         0x100   /* No digits detected.  */
 119
 120 #define DPTOK           0x200   /* (Float) decimal point is still legal.  */
 121 #define EXPOK           0x400   /* (Float) exponent (e+3, etc) still legal.  */
 122
 123 #define PFXOK           0x200   /* "0x" prefix is (still) legal.  */
 124 #define NZDIGITS        0x400   /* No zero digits detected.  */
 125 #define NNZDIGITS       0x800   /* No non-zero digits detected.  */
 126
 127 /* Conversion types.  */
 128
 129 #define CT_CHAR         0       /* "%c" conversion.  */
 130 #define CT_CCL          1       /* "%[...]" conversion.  */
 131 #define CT_STRING       2       /* "%s" conversion.  */
 132 #define CT_INT          3       /* Integer, i.e., strtol.  */
 133 #define CT_UINT         4       /* Unsigned integer, i.e., strtoul.  */
 134 #define CT_FLOAT        5       /* Floating, i.e., strtod.  */
 135
 136 #define u_char unsigned char
 137 #define u_long unsigned long
 138
 139 /* Macro to support positional arguments.  */
 140 #define GET_ARG(n, ap, type) (va_arg ((ap), type))
 141
 142 #define MATCH_FAILURE   1
 143 #define INPUT_FAILURE   2
 144
 145
 146 /* All data needed to decode format string are kept in below struct.  */
 147 struct _scan_data_t
 148 {
 149   int flags;            /* Flags.  */
 150   int base;             /* Base.  */
 151   size_t width;         /* Width.  */
 152   int nassigned;        /* Number of assignments so far.  */
 153   int nread;            /* Number of chars read so far.  */
 154   char *ccltab;         /* Table used for [ format.  */
 155   int code;             /* Current conversion specifier.  */
 156   char buf[BUF];        /* Internal buffer for scan.  */
 157   /* Internal buffer for scan.  */
 158   int (*pfn_ungetc)(struct _reent*, int, FILE*);
 159   /* Internal buffer for scan.  */
 160   int (*pfn_refill)(struct _reent*, FILE*);
 161 };
 162
 163 extern int
 164 _scanf_chars (struct _reent *rptr,
 165               struct _scan_data_t *pdata,
 166               FILE *fp, va_list *ap);
 167 extern int
 168 _scanf_i (struct _reent *rptr,
 169           struct _scan_data_t *pdata,
 170           FILE *fp, va_list *ap);
 171 /* Make _scanf_float weak symbol, so it won't be linked in if target program
 172    does not need it.  */
 173 extern int
 174 _scanf_float (struct _reent *rptr,
 175               struct _scan_data_t *pdata,
 176               FILE *fp, va_list *ap) _ATTRIBUTE((__weak__));
 177
 178 #endif