| /*************************************************************************** |
| * |
| * _num_get.cc - definition of std::num_get members |
| * |
| * $Id$ |
| * |
| *************************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed |
| * with this work for additional information regarding copyright |
| * ownership. The ASF licenses this file to you under the Apache |
| * License, Version 2.0 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| * implied. See the License for the specific language governing |
| * permissions and limitations under the License. |
| * |
| * Copyright 2001-2008 Rogue Wave Software, Inc. |
| * |
| **************************************************************************/ |
| |
| |
| #include <loc/_ctype.h> |
| #include <loc/_locale.h> |
| #include <loc/_numpunct.h> |
| #include <rw/_basic_ios.h> |
| |
| |
| _RWSTD_NAMESPACE (__rw) { |
| |
| _RWSTD_EXPORT int |
| __rw_get_num (void*, const char*, int, int, |
| const char*, _RWSTD_SIZE_T, const char*, _RWSTD_SIZE_T); |
| |
| |
| // array of values of each base 2 through 36 digit, i.e., 0-9, A-Z, |
| // and a-z; elements with a value greater than 35 do not correspond |
| // to any valid digit |
| _RWSTD_EXPORT extern const unsigned char __rw_digit_map[]; |
| |
| // array of 1-based indices for each 8-bit character into an internal |
| // table of values of each roman digit, i.e., I, V, X, L, C, D, and M |
| // elements with a value greater than 7 do not correspond to a roman digit |
| _RWSTD_EXPORT extern const unsigned char __rw_roman_inxs[]; |
| |
| } // namespace __rw |
| |
| |
| _RWSTD_NAMESPACE (std) { |
| |
| |
| template <class _CharT, class _InputIter> |
| _RW::__rw_facet_id num_get<_CharT, _InputIter>::id; |
| |
| |
| |
| #ifndef _RWSTD_NO_EXT_NUM_GET |
| |
| template <class _CharT, class _InputIter> |
| typename num_get<_CharT, _InputIter>::iter_type |
| num_get<_CharT, _InputIter>:: |
| get (iter_type __begin, iter_type __end, ios_base &__flags, |
| _RWSTD_IOSTATE &__err, short &__val) const |
| { |
| _RWSTD_ASSERT_RANGE (__begin, __end); |
| |
| // preserve original value in case it's non-zero and |
| // do_get() fails for reason other than bad grouping |
| long __tmp = __val; |
| |
| __begin = do_get (__begin, __end, __flags, __err, __tmp); |
| __val = __rw_check_overflow_short (__tmp, __flags.flags (), __err); |
| |
| return __begin; |
| } |
| |
| |
| template <class _CharT, class _InputIter> |
| typename num_get<_CharT, _InputIter>::iter_type |
| num_get<_CharT, _InputIter>:: |
| get (iter_type __begin, iter_type __end, ios_base &__flags, |
| _RWSTD_IOSTATE &__err, int &__val) const |
| { |
| _RWSTD_ASSERT_RANGE (__begin, __end); |
| |
| // preserve original value in case it's non-zero and |
| // do_get() fails for reason other than bad grouping |
| long __tmp = long (__val); |
| |
| __begin = do_get (__begin, __end, __flags, __err, __tmp); |
| __val = __rw_check_overflow_int (__tmp, __flags.flags (), __err); |
| |
| return __begin; |
| } |
| |
| #endif // _RWSTD_NO_EXT_NUM_GET |
| |
| |
| #ifndef _RWSTD_NO_NATIVE_BOOL |
| |
| template <class _CharT, class _InputIter /* = istreambuf_iterator<_CharT> */> |
| typename num_get<_CharT, _InputIter>::iter_type |
| num_get<_CharT, _InputIter>:: |
| do_get (iter_type __begin, iter_type __end, ios_base &__flags, |
| _RWSTD_IOSTATE &__err, bool &__val) const |
| { |
| if (0 == (__flags.flags () & _RWSTD_IOS_BOOLALPHA)) { |
| // initialize to an invalid value |
| long __lval = -1L; |
| |
| // avoid calling overridden do_get() if it exists |
| typedef num_get<_CharT, _InputIter> _This; |
| __begin = _This::do_get (__begin, __end, __flags, __err, __lval); |
| |
| // set failbit in accordance with 22.2.2.1.2, p14 but without |
| // testing for failbit in `err' since the bit could be set even |
| // for valid `val' (e.g., when the positions of thousands_seps |
| // in otherwise valid input do not match grouping) |
| if (_RWSTD_STATIC_CAST (unsigned long, __lval) < 2) |
| __val = 0L != __lval; |
| else |
| __err |= _RW::__rw_failbit; |
| |
| return __begin; |
| } |
| |
| __err = _RW::__rw_goodbit; |
| |
| const numpunct<char_type> &__pun = |
| _RWSTD_USE_FACET (numpunct<char_type>, __flags.getloc ()); |
| |
| // lwg issue 17 |
| typedef basic_string<char_type> string_type; |
| |
| const string_type __tnm = __pun.truename (); |
| const string_type __fnm = __pun.falsename (); |
| |
| const char_type* const __names[] = { |
| __fnm.c_str (), __tnm.c_str () |
| }; |
| |
| const _RWSTD_SIZE_T __sizes[] = { |
| __fnm.size (), __tnm.size () |
| }; |
| |
| _RWSTD_SIZE_T __inx = 0; |
| |
| int __errtmp = 1; // maximum number of allowed duplicates |
| |
| __begin = _RW::__rw_match_name (__begin, __end, __names, __sizes, |
| sizeof __names / sizeof *__names, |
| __inx, __errtmp, 0); |
| |
| if (_RWSTD_SIZE_MAX == __inx) |
| __err |= _RW::__rw_failbit; |
| else |
| __val = !!__inx; |
| |
| __err |= _RWSTD_IOSTATE (__errtmp); |
| |
| return __begin; |
| } |
| |
| #endif // _RWSTD_NO_NATIVE_BOOL |
| |
| |
| template <class _CharT, class _InputIter /* = istreambuf_iterator<_CharT> */> |
| typename num_get<_CharT, _InputIter>::iter_type |
| num_get<_CharT, _InputIter>:: |
| _C_get (iter_type __begin, iter_type __end, ios_base &__flags, |
| _RWSTD_IOSTATE &__err, int __type, void *__pval) const |
| { |
| __err = _RW::__rw_goodbit; |
| |
| const int __fl = __flags.flags (); |
| |
| // boolalpha parsing not handled here |
| _RWSTD_ASSERT (__type != _C_bool || !(__fl & _RWSTD_IOS_BOOLALPHA)); |
| |
| const locale &__loc = __flags.getloc (); |
| |
| const numpunct<char_type> &__pun = |
| _RWSTD_USE_FACET (numpunct<char_type>, __loc); |
| |
| // 22.2.2.1.2, p8: Stage 2 |
| |
| char __buf [128 + 2]; // default buffer (128 bits + 2) |
| char *__pbuf = __buf; // pointer to allocated buffer |
| char *__pcur = __buf; // currently processed digit |
| _RWSTD_SIZE_T __bufsize = sizeof __buf; // size of allocated buffer |
| |
| _RWSTD_UNUSED (__bufsize); |
| |
| const ctype<char_type> &__ctp = _RWSTD_USE_FACET (ctype<char_type>, __loc); |
| |
| const _CharT __decimal_point = __pun.decimal_point (); |
| const _CharT __thousands_sep = __pun.thousands_sep (); |
| |
| // grouping string and size are lazily initialized only |
| // when the first thousands_sep() is encountered |
| string __grouping; |
| int __grpsz = -1; |
| |
| // buffer containing the sizes of thousands_sep-separated |
| // groups of digits and a pointer to the next grouping |
| char __grpbuf [sizeof __buf]; |
| char *__pgrp = __grpbuf; |
| |
| const char *__grpbeg = 0; // the beginning of the last group |
| const char *__grpend = 0; // the end of the last group |
| |
| int __base = unsigned (__fl) >> _RWSTD_IOS_BASEOFF; |
| |
| // switch to base-16 for pointer parsing |
| if (_RW::__rw_facet::_C_pvoid == __type) |
| __base = 16; |
| else if (10 == __base && !(__fl & _RWSTD_IOS_BASEFIELD)) |
| __base = 0; |
| |
| int __subtype = __type; // type of the number being parsed |
| |
| typedef unsigned char _UChar; |
| |
| // insert a plus sign (ovewrite it with a minus sign if found) |
| // to avoid having to deal with the fact that it's optional |
| *__pcur++ = '+'; |
| |
| static const _UChar _HexX = _RW::__rw_digit_map [_UChar ('X')]; |
| static const _UChar _Sign = _RW::__rw_digit_map [_UChar ('+')]; |
| |
| // 'x' or 'X' after a leading '0' (the same value for both), |
| // any value outside the valid range [0, 36) is invalid and |
| // will not match any character |
| _UChar __hex_x = _HexX; |
| |
| // leading plus or minus sign (the same value for both) |
| // any value outside the valid range [0, 36) is invalid |
| _UChar __ld_sgn = _Sign; |
| |
| for ( ; ; ++__begin) { |
| |
| if (__begin == __end) { |
| // 22.2.2.1, p13 |
| __err |= _RW::__rw_eofbit; |
| break; |
| } |
| |
| if (__pcur == __buf + sizeof __buf - 1) { |
| // FIXME: handle long strings of digits |
| __err |= _RW::__rw_failbit; |
| break; |
| } |
| |
| const _CharT __wc = *__begin; |
| const char __dp = __decimal_point == __wc ? '.' : '\0'; |
| |
| if ( __thousands_sep == __wc |
| && _RW::__rw_digit_map [_UChar (__pcur [-1])] < 36 |
| && ( __grpsz > 0 |
| || __grpsz < 0 |
| && (__grpsz = int((__grouping = __pun.grouping ()).size ())))) { |
| |
| // the current character is the thousands separator, |
| // the previous character was a digit (and not a sign), |
| // and grouping (lazily initialized above) is not empty |
| |
| if (__pcur == __pbuf + 1) { |
| // 22.2.3.1, p2: thousands_sep not allowed to be first |
| // non-fatal error, set failbit but continue parsing |
| __err |= _RW::__rw_failbit; |
| } |
| |
| if (__grpend) { |
| // thousands_sep not allowed or recognized after the |
| // end of the mantissa has been reached (i.e., after |
| // the decimal point or after 'E' or 'e') |
| break; |
| } |
| |
| // add the length of the current group to the array groups |
| // store UCHAR_MAX if group length exceeds the size of char |
| const _RWSTD_PTRDIFF_T __len = __grpbeg ? |
| __pcur - __grpbeg : __pcur - __pbuf - 1 - (_HexX != __hex_x); |
| |
| if (0 == __len) { |
| // fatal error: thousands_sep characters must be separated |
| // by groups of one or more digits |
| __err |= _RW::__rw_failbit; |
| return __begin; |
| } |
| |
| *__pgrp++ = char (__len < _UChar (_RWSTD_UCHAR_MAX) ? __len : -1); |
| __grpbeg = __pcur; |
| } |
| else if (!__dp) { |
| |
| const char __ch = __ctp.narrow (__wc, '\0'); |
| |
| // get the digit value of the character; anything over |
| // 35 is not a digit (43 is either the plus sign or |
| // the minus sign, for efficiency); the value 99 |
| // indicates an invalid character |
| const _UChar __digit = _RW::__rw_digit_map [_UChar (__ch)]; |
| |
| // 22.2.2.1.2, p8: Stage 8 calls for widening of the sequence |
| // of narrow digits ("0123456789abcdefABCDEFX+-") and looking |
| // up the current wide character in the widened sequence, but |
| // that may not possible unless the wide character type has |
| // operator==() defined |
| |
| if (__subtype & _C_floating) { |
| |
| if (__digit < 10) |
| *__pcur++ = __ch; |
| else if (__pcur == __pbuf + 1) { |
| // plus or minus only permitted (but not required) |
| // as the first character of the mantissa |
| if (__ld_sgn == __digit) { |
| // overwrite the default plus with the sign |
| __pcur [-1] = __ch; |
| |
| // disable future recognition of the leading sign |
| __ld_sgn = 36; |
| } |
| else |
| break; |
| } |
| else { |
| if (/* 'E' or 'e' == __ch */ |
| 14 == _RW::__rw_digit_map [_UChar (__ch)]) { |
| const _RWSTD_PTRDIFF_T __diff = __pcur - __pbuf; |
| |
| if (2 == __diff && '.' == __pcur [-1]) |
| break; |
| |
| if (!__grpend) |
| __grpend = __pcur; |
| *__pcur++ = 'e'; |
| |
| if (__grpsz) { |
| const char __ts = |
| __ctp.narrow (__thousands_sep, '\0'); |
| if (/* '+' or '-' == __ts */ |
| _Sign == _RW::__rw_digit_map [_UChar (__ts)]) |
| __grpsz = 0; |
| } |
| } |
| else if ( 'e' == __pcur [-1] |
| && /* '+' or '-' == __ch */ |
| _Sign == _RW::__rw_digit_map [_UChar (__ch)]) { |
| // '+' or '-' only permitted (but not required) |
| // as the first character after 'e' or 'E' |
| |
| *__pcur++ = __ch; |
| |
| // reached the exponent part of a floating point number |
| // switch to parsing a decimal integer |
| __base = 10; |
| __subtype = _C_int; |
| } |
| else |
| break; // invalid character terminates input |
| } |
| } |
| else { |
| if (__pcur == __pbuf + 1 && __digit == __ld_sgn) { |
| __pcur [-1] = __ch; // overwrite the default '+' |
| __ld_sgn = 36; // disable leading sign |
| } |
| else if (16 == __base) { |
| if (__digit < 16) |
| *__pcur++ = __ch; |
| else if ( __digit == __hex_x |
| && __pcur == __pbuf + 2 |
| && __pcur [-1] == '0') { |
| // don't append the 'x' part of the "0x" prefix |
| // and disable the recognition of any future 'x' |
| __hex_x = 36; |
| } |
| else |
| break; // invalid character terminates input |
| } |
| else if (__base > 1) { |
| if (__digit < __base) |
| *__pcur++ = __ch; |
| else |
| break; // invalid character terminates input |
| } |
| else if (0 == __base) { |
| |
| // autodetect the base |
| |
| if (__digit < 10) { |
| if ( __digit && __digit < 8 |
| && *(__pcur - 1) == '0' && __pcur == __pbuf + 2) |
| __base = 8; |
| *__pcur++ = __ch; |
| } |
| else if ( __digit == __hex_x |
| && __pcur == __pbuf + 2 |
| && __pcur [-1] == '0') { |
| __hex_x = 36; // disable future 'x' |
| __base = 16; // set base-16 |
| --__pcur; // remove leading '0' |
| } |
| else |
| break; // invalid character terminates input |
| } |
| else { |
| if (_RW::__rw_roman_inxs [_UChar (__ch)] <= 7) |
| *__pcur++ = __ch; |
| else if (__pcur == __pbuf + 1 && __digit < 10) { |
| *__pcur++ = __ch; |
| // if the first character is a digit |
| // switch to decimal (base-10) parsing |
| __base = 10; |
| } |
| else { |
| // invalid character terminates input |
| break; |
| } |
| } |
| } |
| } |
| else if (__subtype & _C_floating) { |
| if (__grpend) |
| break; |
| |
| __grpend = __pcur; |
| *__pcur++ = '.'; |
| } |
| else |
| break; |
| } |
| |
| // add the length of the last group to the array of groups |
| { |
| // add the length of the current group to the array groups |
| // store UCHAR_MAX if group length exceeds the size of char |
| _RWSTD_PTRDIFF_T __len; |
| |
| if (__grpend) { |
| |
| #if defined (_RWSTD_NO_STRTOLD) && defined (_RWSTD_NO_STRTOLD_IN_LIBC) |
| |
| // detect invalid formats in case strtold() is not |
| // available (scanf() will not detect these) |
| |
| if ( 'e' == __pcur [-1] |
| || '-' == __pcur [-1] || '+' == __pcur [-1]) { |
| __err |= _RW::__rw_failbit; |
| return __begin; |
| } |
| |
| #endif // _RWSTD_NO_STRTOLD && _RWSTD_NO_STRTOLD_IN_LIBC |
| |
| } |
| else |
| __grpend = __pcur; |
| |
| __len = __grpbeg ? |
| __grpend - __grpbeg : __grpend - __pbuf - 1 - (_HexX != __hex_x); |
| |
| if (__grpbeg && 0 == __len) { |
| // fatal error: according to the grammar in [locale.numpunct] |
| // thousands_sep characters must be separated by groups of one |
| // or more digits (i.e., valid input cannot start or end with |
| // a thousands_sep); this needs to be clarified in the text |
| __err |= _RW::__rw_failbit; |
| return __begin; |
| } |
| |
| *__pgrp++ = char (__len < _UChar (_RWSTD_UCHAR_MAX) ? __len : -1); |
| } |
| |
| *__pgrp = '\0'; |
| *__pcur = '\0'; |
| |
| // verify that the buffers haven't overflowed |
| _RWSTD_ASSERT (__pgrp < __grpbuf + sizeof __grpbuf); |
| _RWSTD_ASSERT (__pcur < __pbuf + __bufsize); |
| |
| // set the base determined above |
| const unsigned __fl2 = |
| __fl & ~_RWSTD_IOS_BASEFIELD |
| & ~( _RWSTD_STATIC_CAST (unsigned, _RWSTD_IOS_BASEMASK) |
| << _RWSTD_IOS_BASEOFF) |
| | __base << _RWSTD_IOS_BASEOFF; |
| |
| // 22.2.2.1.2, p11: Stage 3 |
| const int __errtmp = |
| _RW::__rw_get_num (__pval, __pbuf, __type, __fl2, |
| __grpbuf, __pgrp - __grpbuf, |
| __grouping.data (), __grouping.size ()); |
| |
| __err |= _RWSTD_IOSTATE (__errtmp); |
| |
| return __begin; |
| } |
| |
| |
| } // namespace std |
