C++ Library containing a lot of needful things: Stack Trace, Command Line Parser, Resource Handling, Configuration Files, Unix Command Execution, Directories, Regular Expressions, Tokenizer, Function Trace, Standard Extensions.
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112 lines
4.0 KiB
112 lines
4.0 KiB
/*! @file |
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@id $Id$ |
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*/ |
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// 1 2 3 4 5 6 7 8 |
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// 45678901234567890123456789012345678901234567890123456789012345678901234567890 |
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#ifndef __MRW__IOMANIP__ |
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#define __MRW__IOMANIP__ |
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#include <stdexcept> |
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#include <sstream> |
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#include <string> |
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#include <iomanip> |
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// check if code is compiled with a new C++11 compiler |
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// otherwise there is a fallback wich makes everything much more compliacted |
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#ifndef MRW__OLD_PRE11_COMPILER |
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#if __cplusplus < 201103L |
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/// Code is compiled with an old non C++11 standard compliant compiler |
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/** There are workarounds for old non C++11 compatible |
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compilers. These workarounds are deprecated, but will remain until |
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most compilers fully support C++11. So this workaround will be |
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removed in future releases, when support for C++11 is more |
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common. Only rely on this workaround, if you really have to. |
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@see oldcompiler for details on usage */ |
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#define MRW__OLD_PRE11_COMPILER |
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#warning You need a C++11 compliant compiler, on gcc use option -std=c++11 |
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#warning emulating C++11 - this changes the way you use the library |
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#warning this is deprecated and will be removed in future releases |
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#warning refere to the library documentation for more details |
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#endif |
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#endif |
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namespace mrw { |
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//! IO-Manipulator to split long lines into several shorter lines. |
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template <class _CharT = char, class _Traits = std::char_traits<_CharT> > |
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class basic_split /*: public std::basic_ostream<_CharT, _Traits>*/ { |
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public: |
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basic_split(const basic_split& o): |
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_width(o._width), |
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_indent(o._indent), |
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_fill(o._fill), |
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_buffer(o._buffer.str()), |
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_os(o._os) { |
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} |
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basic_split(int width=80, int indent=0, char fill=' '): |
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_width(width), _indent(indent), _fill(fill), _os(0) { |
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if (_width<_indent) |
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#ifdef MRW__OLD_PRE11_COMPILER |
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throw std::runtime_error(((std::stringstream&) |
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(std::stringstream() |
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<<"wrong use of split: width is "<<_width |
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<<" but should be larger than indent," |
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<<" which is "<<_indent)).str()); |
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#else |
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throw std::runtime_error("wrong use of split: width is "+ |
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std::to_string(_width)+ |
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" but should be larger than indent," |
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" which is "+std::to_string(_indent)); |
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#endif |
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} |
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virtual ~basic_split() { |
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flush(); |
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} |
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friend basic_split& operator<<(std::basic_ostream<_CharT, _Traits>& os, |
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const basic_split& s) { |
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if (s._os!=&os) { |
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const_cast<basic_split&>(s).flush(); |
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const_cast<basic_split&>(s)._os = &os; |
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} |
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return const_cast<basic_split&>(s); |
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} |
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template <typename T> basic_split& operator<<(const T& t) { |
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if (!_os) |
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throw std::runtime_error("wrong use of split, it is an io" |
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" manipulator and must be used within" |
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" a stream"); |
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_buffer<<t; |
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while (_buffer.str().size()>=_width-_indent) { |
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if (_indent) *_os<<std::setw(_indent)<<std::setfill(_fill)<<_fill; |
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std::string::size_type pos |
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(_buffer.str().find_last_of(' ', _width-_indent)); |
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std::string::size_type next(pos+1); |
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if (pos==std::string::npos) { |
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pos=_width-_indent; |
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next=pos; |
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} |
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*_os<<_buffer.str().substr(0, pos)<<std::endl; |
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_buffer.str(_buffer.str().substr(next)); |
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} |
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return *this; |
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} |
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private: |
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void flush() { |
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if (_os) { |
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if (_indent) *_os<<std::setw(_indent)<<std::setfill(_fill)<<_fill; |
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*_os<<_buffer.str(); |
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_buffer.clear(); |
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} |
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} |
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private: |
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int _width; |
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int _indent; |
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char _fill; |
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std::stringstream _buffer; |
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std::basic_ostream<_CharT, _Traits>* _os; |
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}; |
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typedef basic_split<char> ssplit; |
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} |
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#endif
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