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/* Copyright (C) 2004 Garrett A. Kajmowicz |
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This file is part of the uClibc++ Library. |
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
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License along with this library; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include |
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#include |
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#include |
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#ifndef __STD_HEADER_ISTREAM_HELPERS |
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#define __STD_HEADER_ISTREAM_HELPERS 1 |
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#pragma GCC visibility push(default) |
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namespace std{ |
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/* We are making the following template class for serveral reasons. Firstly, |
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* we want to keep the main istream code neat and tidy. Secondly, we want it |
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* to be easy to do partial specialization of the istream code so that it can |
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* be expanded and put into the library. This will allow us to make application |
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* code smaller at the expense of increased library size. This is a fair |
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* trade-off when there are multiple applications being compiled. Also, this |
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* feature will be used optionally via configuration options. It will also |
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* allow us to keep the code bases in sync, dramatically simplifying the |
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* maintenance required. We specialized for char because wchar and others |
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* require different scanf functions |
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*/ |
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template _UCXXEXPORT |
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basic_string _readToken(basic_istream& stream) |
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{ |
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basic_string temp; |
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typename traits::int_type c; |
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while(true){ |
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c = stream.rdbuf()->sgetc(); |
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if(c != traits::eof() && isspace(c) == false){ |
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stream.rdbuf()->sbumpc(); |
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temp.append(1, traits::to_char_type(c)); |
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}else{ |
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break; |
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} |
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} |
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if (temp.size() == 0) |
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stream.setstate(ios_base::eofbit|ios_base::failbit); |
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return temp; |
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} |
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template _UCXXEXPORT |
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basic_string _readTokenDecimal(basic_istream& stream) |
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{ |
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basic_string temp; |
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typename traits::int_type c; |
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while(true){ |
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c = stream.rdbuf()->sgetc(); |
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if(c != traits::eof() && isspace(c) == false && ( |
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isdigit(c) || |
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c == '.' || |
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c == ',' || |
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((c == '-' || c == '+') && temp.size() == 0) ) |
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){ |
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stream.rdbuf()->sbumpc(); |
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temp.append(1, traits::to_char_type(c)); |
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}else{ |
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break; |
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} |
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} |
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if (temp.size() == 0) |
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stream.setstate(ios_base::eofbit|ios_base::failbit); |
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return temp; |
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} |
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#ifdef __UCLIBCXX_EXPAND_ISTREAM_CHAR__ |
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template <> _UCXXEXPORT string _readToken >(istream & stream); |
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#endif |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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static void readin(basic_istream& stream, dataType & var); |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, bool & var) |
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{ |
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/* 22.4.2.1.2.4 */ |
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basic_string temp; |
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temp = _readToken( stream); |
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if (stream.flags() & ios_base::boolalpha) { |
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if (temp == "true") // truename() |
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var = true; |
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else { |
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var = false; |
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if (temp != "false") // falsename() |
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stream.setstate(ios_base::failbit); |
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} |
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} else { |
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long int i = 0; |
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int ret; |
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if (stream.flags() & ios_base::dec) { |
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ret = sscanf(temp.c_str(), "%ld", &i ); |
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} else { |
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if (stream.flags() & ios_base::oct) { |
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ret = sscanf(temp.c_str(), "%lo", (unsigned long int *)(&i)); |
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} else if (stream.flags() & ios_base::hex) { |
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if (stream.flags() & ios_base::uppercase) { |
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ret = sscanf(temp.c_str(), "%lX", (unsigned long int *)(&i)); |
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} else { |
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ret = sscanf(temp.c_str(), "%lx", (unsigned long int *)(&i)); |
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} |
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} else { |
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ret = sscanf(temp.c_str(), "%li", &i); |
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} |
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} |
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if (ret != 1 || i >> 1) |
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stream.setstate(ios_base::failbit); |
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var = ret == 1 && bool(i); |
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} |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, short & var) |
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{ |
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basic_string temp; |
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if(stream.flags() & ios_base::dec){ |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%hd", &var ); |
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}else{ |
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temp = _readToken( stream); |
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if( stream.flags() & ios_base::oct){ |
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sscanf(temp.c_str(), "%ho", (unsigned short int *)(&var) ); |
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}else if(stream.flags() & ios_base::hex){ |
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if(stream.flags() & ios_base::uppercase){ |
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sscanf(temp.c_str(), "%hX", (unsigned short int *)(&var) ); |
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}else{ |
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sscanf(temp.c_str(), "%hx", (unsigned short int *)(&var) ); |
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} |
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}else{ |
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sscanf(temp.c_str(), "%hi", &var); |
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} |
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} |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, unsigned short & var) |
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{ |
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basic_string temp; |
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if(stream.flags() & ios_base::dec){ |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%hu", &var ); |
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}else{ |
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temp = _readToken( stream); |
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if( stream.flags() & ios_base::oct){ |
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sscanf(temp.c_str(), "%ho", &var); |
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}else if(stream.flags() & ios_base::hex){ |
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if(stream.flags() & ios_base::uppercase){ |
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sscanf(temp.c_str(), "%hX", &var ); |
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}else{ |
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sscanf(temp.c_str(), "%hx", &var); |
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} |
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}else{ |
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sscanf(temp.c_str(), "%hi", (signed short int*)(&var) ); |
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} |
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} |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, int & var) |
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{ |
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basic_string temp; |
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if(stream.flags() & ios_base::dec){ |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%d", &var ); |
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}else{ |
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temp = _readToken( stream); |
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if( stream.flags() & ios_base::oct){ |
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sscanf(temp.c_str(), "%o", (unsigned int *)(&var) ); |
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}else if(stream.flags() & ios_base::hex){ |
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if(stream.flags() & ios_base::uppercase){ |
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sscanf(temp.c_str(), "%X", (unsigned int *)(&var) ); |
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}else{ |
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sscanf(temp.c_str(), "%x", (unsigned int *)(&var) ); |
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} |
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}else{ |
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sscanf(temp.c_str(), "%i", &var); |
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} |
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} |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, unsigned int & var) |
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{ |
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basic_string temp; |
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if(stream.flags() & ios_base::dec){ |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%u", &var ); |
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}else{ |
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temp = _readToken( stream); |
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if( stream.flags() & ios_base::oct){ |
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sscanf(temp.c_str(), "%o", (unsigned int *)(&var) ); |
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}else if(stream.flags() & ios_base::hex){ |
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if(stream.flags() & ios_base::uppercase){ |
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sscanf(temp.c_str(), "%X", (unsigned int *)(&var) ); |
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}else{ |
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sscanf(temp.c_str(), "%x", (unsigned int *)(&var) ); |
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} |
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}else{ |
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sscanf(temp.c_str(), "%i", (int *)(&var) ); |
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} |
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} |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, long int & var) |
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{ |
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basic_string temp; |
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if(stream.flags() & ios_base::dec){ |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%ld", &var ); |
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}else{ |
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temp = _readToken( stream); |
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if( stream.flags() & ios_base::oct){ |
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sscanf(temp.c_str(), "%lo", (unsigned long int *)(&var) ); |
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}else if(stream.flags() & ios_base::hex){ |
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if(stream.flags() & ios_base::uppercase){ |
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sscanf(temp.c_str(), "%lX", (unsigned long int *)(&var) ); |
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}else{ |
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sscanf(temp.c_str(), "%lx", (unsigned long int *)(&var) ); |
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} |
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}else{ |
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sscanf(temp.c_str(), "%li", (long int *)(&var) ); |
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} |
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} |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, unsigned long int & var) |
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{ |
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basic_string temp; |
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if(stream.flags() & ios_base::dec){ |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%lu", &var ); |
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}else{ |
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temp = _readToken( stream); |
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if( stream.flags() & ios_base::oct){ |
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sscanf(temp.c_str(), "%lo", &var ); |
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}else if(stream.flags() & ios_base::hex){ |
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if(stream.flags() & ios_base::uppercase){ |
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sscanf(temp.c_str(), "%lX", &var ); |
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}else{ |
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sscanf(temp.c_str(), "%lx", &var); |
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} |
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}else{ |
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sscanf(temp.c_str(), "%li", (long int *)(&var) ); |
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} |
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} |
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} |
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}; |
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#ifdef __UCLIBCXX_HAS_FLOATS__ |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, float & var) |
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{ |
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basic_string temp; |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%g", &var); |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, double & var) |
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{ |
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basic_string temp; |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%lg", &var); |
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} |
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}; |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, long double & var) |
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{ |
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basic_string temp; |
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temp = _readTokenDecimal( stream); |
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sscanf(temp.c_str(), "%Lg", &var); |
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} |
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}; |
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#endif // ifdef __UCLIBCXX_HAS_FLOATS__ |
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template class _UCXXEXPORT __istream_readin{ |
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public: |
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inline static void readin(basic_istream& stream, void* & var) |
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{ |
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basic_string temp; |
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temp = _readToken( stream); |
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sscanf(temp.c_str(), "%p", &var); |
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} |
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}; |
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template void __skipws(basic_istream& is){ |
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const typename basic_istream::int_type eof = traits::eof(); |
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typename basic_istream::int_type c; |
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//While the next character normally read doesn't equal eof |
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//and that character is a space, advance to the next read position |
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//Thus itterating through all whitespace until we get to the meaty stuff |
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while ( |
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!traits::eq_int_type((c = is.rdbuf()->sgetc()), eof) |
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&& isspace(c) |
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) { |
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is.rdbuf()->sbumpc(); |
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} |
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if(traits::eq_int_type(c, eof)){ |
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is.setstate(ios_base::eofbit); |
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} |
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} |
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} |
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#pragma GCC visibility pop |
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#endif |
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