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 sungetc 61 #define _srefill _ssrefill 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 code be 70 preferred over __dtoa. */ 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)(int, FILE*); 159 /* Internal buffer for scan. */ 160 int (*pfn_refill)(FILE*); 161 }; 162 163 extern int 164 _scanf_chars ( 165 struct _scan_data_t *pdata, 166 FILE *fp, va_list *ap); 167 extern int 168 _scanf_i ( 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 ( 175 struct _scan_data_t *pdata, 176 FILE *fp, va_list *ap) _ATTRIBUTE((__weak__)); 177 178 #endif 179
