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This commit is contained in:
Jose Caban
399
extern/stdcxx/4.2.1/include/rw/_stringio.cc
vendored
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399
extern/stdcxx/4.2.1/include/rw/_stringio.cc
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/***************************************************************************
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*
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* _stringio.cc - definitions of the string extractors
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*
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* $Id: _stringio.cc 637130 2008-03-14 15:16:33Z faridz $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2008 Rogue Wave Software.
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*
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**************************************************************************/
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_RWSTD_NAMESPACE (std) {
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_EXPORT
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template<class _CharT, class _Traits, class _Allocator>
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basic_istream<_CharT, _Traits>&
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operator>> (basic_istream<_CharT, _Traits>& __is,
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basic_string<_CharT, _Traits, _Allocator>& __str)
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{
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_RWSTD_ASSERT (0 != __is.rdbuf ());
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const _TYPENAME basic_istream<_CharT, _Traits>::sentry
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__ipfx (__is /* , noskipws = false */);
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ios_base::iostate __err = ios_base::goodbit;
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typedef _RWSTD_SIZE_T _SizeT;
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// count of characters read from stream
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_SizeT __gcount = 0;
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_TRY {
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if (__ipfx) {
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__str.clear ();
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// maximum number of characters we can read
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_RWSTD_SIZE_T __n =
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__is.width () ? __is.width () : __str.max_size ();
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basic_streambuf<_CharT, _Traits>* const __rdbuf = __is.rdbuf ();
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const ctype<_CharT> &__ctp =
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_USE_FACET (ctype<_CharT>, __is.getloc ());
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#ifndef _RWSTD_NO_FRIEND_TEMPLATE
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while (__n != 0) {
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const _CharT* const __gptr = __rdbuf->gptr ();
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const _CharT* const __egptr = __rdbuf->egptr ();
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// maximum number of characters would want to extract
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_SizeT __navail = __egptr - __gptr;
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if (__n < __navail)
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__navail = __n;
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if (__navail) {
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// find the delimeter in the squence if it exists, or
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// get pointer to end of sequence
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const _CharT* __pdel = __gptr;
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for (/**/; __pdel != __egptr; ++__pdel) {
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const _TYPENAME _Traits::int_type
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__c = _Traits::to_int_type(*__pdel);
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if (_Traits::eq_int_type (__c, _Traits::eof ())) {
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__err = ios_base::eofbit;
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break;
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}
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if (__ctp.is (__ctp.space, *__pdel))
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break;
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}
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// __pdel is either pointing to a delimiter or one past
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// the end of the input stream get area. if it is past
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// the end, then set it to null.
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if (__pdel == __egptr) {
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__pdel = 0;
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}
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if (__pdel) {
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__navail = __pdel - __gptr + 1;
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__n -= __navail - 1;
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}
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else if (__n == __navail)
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__n -= --__navail;
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else
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__n -= __navail;
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// store characters excluding the delimiter
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__str.append (__gptr, __navail - !!__pdel);
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__gcount += __navail;
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// advance gptr() by the number of extracted
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// characters, including the delimiter
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__rdbuf->gbump (__navail);
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// we found a delimiter before the end of the get area,
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// break out of outer loop
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if (__pdel) {
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break;
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}
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if (2 > __n && _SizeT (__egptr - __gptr) != __navail) {
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__err = ios_base::failbit;
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break;
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}
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}
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else {
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// n data in buffer, trigger underflow()
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// note that streambuf may be unbuffered
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const _TYPENAME _Traits::int_type
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__c = __rdbuf->sgetc ();
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if (_Traits::eq_int_type (__c, _Traits::eof ())) {
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__err = ios_base::eofbit;
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break;
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}
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// convert to char_type so that isspace works correctly
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const _TYPENAME _Traits::char_type
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__ch = _Traits::to_char_type (__c);
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if (__ctp.is (__ctp.space, __ch))
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break;
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__str.push_back (__ch);
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--__n;
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__rdbuf->sbumpc ();
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// increment gcount only _after_ sbumpc() but _before_
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// the subsequent call to sgetc() to correctly reflect
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// the number of extracted characters in the presence
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// of exceptions thrown from streambuf virtuals
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++__gcount;
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}
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}
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#else // if defined (_RWSTD_NO_FRIEND_TEMPLATE)
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for ( ; __n != 0; ) {
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const _TYPENAME _Traits::int_type
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__c (__rdbuf->sgetc ());
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if (_Traits::eq_int_type (__c, _Traits::eof ())) {
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__err = ios_base::eofbit;
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break;
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}
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// convert to char_type so that isspace works correctly
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const _TYPENAME _Traits::char_type
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__ch = _Traits::to_char_type (__c);
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if (__ctp.is (__ctp.space, __ch))
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break;
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__str.push_back (__ch);
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--__n;
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__rdbuf->sbumpc ();
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// increment gcount only _after_ sbumpc() but _before_
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// the subsequent call to sgetc() to correctly reflect
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// the number of extracted characters in the presence
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// of exceptions thrown from streambuf virtuals
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++__gcount;
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}
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#endif // if defined (_RWSTD_NO_FRIEND_TEMPLATE)
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__is.width (0);
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}
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}
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_CATCH (...) {
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__is.setstate (ios_base::badbit | _RW::__rw_rethrow);
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}
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if (!__gcount)
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__err |= ios_base::failbit;
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if (__err)
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__is.setstate (__err);
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return __is;
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}
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_EXPORT
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template<class _CharT, class _Traits, class _Allocator>
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basic_istream<_CharT, _Traits>&
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getline (basic_istream<_CharT, _Traits>& __is,
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basic_string<_CharT, _Traits, _Allocator>& __str,
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_CharT __delim)
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{
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_RWSTD_ASSERT (0 != __is.rdbuf ());
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const _TYPENAME basic_istream<_CharT, _Traits>::sentry
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__ipfx (__is, true /* noskipws */);
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#ifndef _RWSTD_NO_FRIEND_TEMPLATE
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ios_base::iostate __err = ios_base::goodbit;
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typedef _RWSTD_SIZE_T _SizeT;
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_SizeT __gcount = 0;
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if (__ipfx) {
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__str.clear ();
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// carefuly handle arithmetic overflow
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_SizeT __n = __str.max_size ();
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if (__n + _SizeT (1))
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++__n;
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basic_streambuf<_CharT, _Traits>* const __rdbuf = __is.rdbuf ();
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_TRY {
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for ( ; ; ) {
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typedef _TYPENAME _Traits::int_type int_type;
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const _CharT* const __gptr = __rdbuf->gptr ();
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const _CharT* const __egptr = __rdbuf->egptr ();
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// compute the lesser of the number of characters in the
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// stream buffer and the size of the destination buffer
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_SizeT __navail = __egptr - __gptr;
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if (__n < __navail)
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__navail = __n;
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if (__navail) {
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// find the delimiter in the sequence if it exists
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const _CharT* const __pdel =
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_Traits::find (__gptr, __navail, __delim);
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if (__pdel) {
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__navail = __pdel - __gptr + 1;
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__n -= __navail - 1;
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}
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else if (__n == __navail)
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__n -= --__navail;
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else
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__n -= __navail;
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// store characters excluding the delimiter
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__str.append (__gptr, __navail - !!__pdel);
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__gcount += __navail;
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// advance gptr() by the number of extracted
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// characters, including the delimiter
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__rdbuf->gbump (__navail);
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if (__pdel) {
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break;
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}
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if (2 > __n && _SizeT (__egptr - __gptr) != __navail) {
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__err = ios_base::failbit;
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break;
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}
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}
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else {
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// no data in buffer, trigger underflow()
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// note that streambuf may be unbuffered
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const int_type __c (__rdbuf->sgetc ());
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if (_Traits::eq_int_type (__c, _Traits::eof ())) {
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__err = ios_base::eofbit;
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break;
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}
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const _CharT __ch = _Traits::to_char_type (__c);
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if (_Traits::eq (__ch, __delim)) {
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__rdbuf->sbumpc ();
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__gcount++;
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break;
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}
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if (2 > __n) {
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__err = ios_base::failbit;
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break;
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}
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__str += __ch;
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--__n;
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__rdbuf->sbumpc ();
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// increment gcount only _after_ sbumpc() but _before_
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// the subsequent call to sgetc() to correctly reflect
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// the number of extracted characters in the presence
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// of exceptions thrown from streambuf virtuals
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++__gcount;
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}
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}
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}
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_CATCH (...) {
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__is.setstate (ios_base::badbit | _RW::__rw_rethrow);
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}
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}
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if (!__gcount)
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__err |= ios_base::failbit;
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#else // if defined (_RWSTD_NO_FRIEND_TEMPLATE)
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ios_base::iostate __err = ios_base::failbit;
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if (__ipfx) {
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_TRY {
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__str.clear ();
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const _RWSTD_SIZE_T __max_size = __str.max_size ();
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// FIXME: code commented out to work around an HP aCC 3.14.10
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// bug #JAGac86264
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// typedef _TYPENAME
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// basic_string<_CharT, _Traits, _Allocator>::size_type
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for ( ; ; ) {
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const _TYPENAME _Traits::int_type
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__c (__is.rdbuf ()->sgetc ());
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if (_Traits::eq_int_type (__c, _Traits::eof ())) {
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// 21.3.7.9, p7
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if (__str.size ())
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__err = ios_base::eofbit;
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else
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__err = ios_base::eofbit | ios_base::failbit;
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break;
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}
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if (_Traits::eq (_Traits::to_char_type (__c), __delim)) {
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__is.rdbuf ()->sbumpc ();
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__err = ios_base::goodbit;
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break;
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}
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if (__max_size <= __str.size ())
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break;
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__str.push_back (_Traits::to_char_type (__c));
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__is.rdbuf ()->sbumpc ();
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}
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}
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_CATCH (...) {
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__is.setstate (ios_base::badbit | _RW::__rw_rethrow);
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}
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}
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#endif // _RWSTD_NO_FRIEND_TEMPLATE
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if (__err)
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__is.setstate (__err);
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return __is;
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}
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} // namespace std
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