ostream_helpers

/*	Copyright (C) 2004 Garrett A. Kajmowicz

	This file is part of the uClibc++ Library.

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this library; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <basic_definitions>
#include <cstddef>
#include <ios>
#include <cctype>
#include <string>

#ifndef __STD_HEADER_OSTREAM_HELPERS
#define __STD_HEADER_OSTREAM_HELPERS 1

#pragma GCC visibility push(default)

namespace std{

	/* We are making the following template class for serveral reasons.  Firstly,
	 * we want to keep the main ostream code neat and tidy.  Secondly, we want it
	 * to be easy to do partial specialization of the ostream code so that it can
	 * be expanded and put into the library.  This will allow us to make application
	 * code smaller at the expense of increased library size.  This is a fair
	 * trade-off when there are multiple applications being compiled.  Also, this
	 * feature will be used optionally via configuration options.  It will also
	 * allow us to keep the code bases in sync, dramatically simplifying the
	 * maintenance required.  We specialized for char because wchar and others
	 * require different scanf functions
	 */



	template <class traits, class charT, class dataType> class _UCXXEXPORT __ostream_printout{
	public:
		static void printout(basic_ostream<charT,traits>& stream, const dataType n);
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, char, signed long int>{
	public:
		static void printout(basic_ostream<char, traits >& stream, const signed long int n)
		{
			char buffer[20];
			const char * c_ld = "%ld";
			const char * c_lo = "%lo";
			const char * c_lX = "%lX";
			const char * c_lx = "%lx";
			const char * c_hashlo = "%#lo";
			const char * c_hashlX = "%#lX";
			const char * c_hashlx = "%#lx";

			const char * formatString=0;

			if( stream.flags() & ios_base::dec){
				formatString = c_ld;
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					formatString = c_hashlo;
				}else{
					formatString = c_lo;
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						formatString = c_hashlX;
					}else{
						formatString = c_hashlx;
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						formatString = c_lX;
					}else{
						formatString = c_lx;
					}
				}
			}

			stream.printout(buffer, snprintf(buffer, 20, formatString, n) );

			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}

		}
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, char, unsigned long int>{
	public:
		static void printout(basic_ostream<char, traits >& stream, const unsigned long int n)
		{
			char buffer[20];
			const char * c_lo = "%lo";
			const char * c_lu = "%lu";
			const char * c_lX = "%lX";
			const char * c_lx = "%lx";
			const char * c_hashlo = "%#lo";
			const char * c_hashlX = "%#lX";
			const char * c_hashlx = "%#lx";
			const char * formatString=0;

			if( stream.flags() & ios_base::dec){
				formatString = c_lu;
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					formatString = c_hashlo;
				}else{
					formatString = c_lo;
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						formatString = c_hashlX;
					}else{
						formatString = c_hashlx;
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						formatString = c_lX;
					}else{
						formatString = c_lx;
					}
				}
			}

			stream.printout(buffer, snprintf(buffer, 20, formatString, n));
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

#ifndef __STRICT_ANSI__

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, char, signed long long int>{
	public:
		static void printout(basic_ostream<char, traits >& stream, const signed long long int n)
		{
			char buffer[28];
			const char * lld = "%lld";
			const char * llo = "%llo";
			const char * llX = "%llX";
			const char * llx = "%llx";
			const char * hashllo = "%#llo";
			const char * hashllX = "%#llX";
			const char * hashllx = "%#llx";
			const char * formatString=0;

			if( stream.flags() & ios_base::dec){
				formatString = lld;
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					formatString = hashllo;
				}else{
					formatString = llo;
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						formatString = hashllX;
					}else{
						formatString = hashllx;
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						formatString = llX;
					}else{
						formatString = llx;
					}
				}
			}

			stream.printout(buffer, snprintf(buffer, 27, formatString, n) );

			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, char, unsigned long long int>{
	public:
		static void printout(basic_ostream<char, traits >& stream, const unsigned long long int n)
		{
			char buffer[28];
			const char * llo = "%llo";
			const char * llu = "%llu";
			const char * llX = "%llX";
			const char * llx = "%llx";
			const char * hashllo = "%#llo";
			const char * hashllX = "%#llX";
			const char * hashllx = "%#llx";
			const char * formatString=0;

			if( stream.flags() & ios_base::dec){
				formatString = llu;
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					formatString = hashllo;
				}else{
					formatString = llo;
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						formatString = hashllX;
					}else{
						formatString = hashllx;
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						formatString = llX;
					}else{
						formatString = llx;
					}
				}
			}

			stream.printout(buffer, snprintf(buffer, 27, formatString, n) );

			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};


#endif	//__STRICT_ANSI__

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, char, float>{
	public:
		static void printout(basic_ostream<char, traits >& stream, const float f)
		{
			char buffer[32];
			int length;
			
#ifdef __AVR__
			length = strlen(dtostrf(f, static_cast<int>(stream.width()), static_cast<int>(stream.precision()), buffer));

#else
			length = snprintf(buffer, 32, "%*.*f",static_cast<int>(stream.width()),static_cast<int>(stream.precision()), f);
#endif

			stream.printout(buffer, length);
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, char, double>{
	public:
		static void printout(basic_ostream<char, traits >& stream, const double f)
		{
			char buffer[32];
			int length;
			if(stream.flags() & ios_base::scientific){
				if(stream.flags() & ios_base::uppercase){
#if defined( __AVR__ )
					length = strlen(dtostre(f, buffer, static_cast<int>(stream.precision()),  0x04 ));
#else		
					length = snprintf(buffer, 32, "%*.*E", static_cast<int>(stream.width()),static_cast<int>(stream.precision()), f);
#endif
				}else{
#if defined( __AVR__ )
					length = strlen(dtostre(f, buffer, static_cast<int>(stream.precision()), 0));
#else				
					length = snprintf(buffer, 32, "%*.*e", static_cast<int>(stream.width()),static_cast<int>(stream.precision()), f);
#endif					
				}
			} else if(stream.flags() & ios_base::fixed){
#if defined( __AVR__ )
				length = strlen(dtostrf(f, static_cast<int>(stream.width()), static_cast<int>(stream.precision()), buffer));
#else			
				length = snprintf(buffer, 32, "%*.*f",static_cast<int>(stream.width()),static_cast<int>(stream.precision()), f);
#endif				
			} else {
#if defined( __AVR__ )
				length = strlen(dtostrf(f, static_cast<int>(stream.width()), static_cast<int>(stream.precision()), buffer));
#else			
				length = snprintf(buffer, 32, "%*.*g",static_cast<int>(stream.width()),static_cast<int>(stream.precision()), f);
#endif				
			}
			stream.printout(buffer, length);
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, char, long double>{
	public:
		static void printout(basic_ostream<char, traits >& stream, const long double f)
		{
			char buffer[32];
			int length;
			if(stream.flags() & ios_base::scientific){
				if(stream.flags() & ios_base::uppercase){
					length = snprintf(buffer, 32, "%*.*LE", static_cast<int>(stream.width()), static_cast<int>(stream.precision()), f);
				}else{
					length = snprintf(buffer, 32, "%*.*Le", static_cast<int>(stream.width()), static_cast<int>(stream.precision()), f);
				}
			} else if(stream.flags() & ios_base::fixed){
				length = snprintf(buffer, 32, "%*.*Lf", static_cast<int>(stream.width()), static_cast<int>(stream.precision()), f);
			} else {
				length = snprintf(buffer, 32, "%*.*Lg", static_cast<int>(stream.width()), static_cast<int>(stream.precision()), f);
			}
			stream.printout(buffer, length);
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}

		}
	};

#ifdef __UCLIBCXX_HAS_WCHAR__
	template <class traits> class _UCXXEXPORT __ostream_printout<traits, wchar_t, signed long int>{
	public:
		static void printout(basic_ostream<wchar_t, traits >& stream, const signed long int n)
		{
			wchar_t buffer[20];
			if( stream.flags() & ios_base::dec){
				stream.printout(buffer, swprintf(buffer, 20, L"%ld", n));
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					stream.printout(buffer, swprintf(buffer, 20, L"%#lo", n));
				}else{
					stream.printout(buffer, swprintf(buffer, 20, L"%lo", n) );
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 20, L"%#lX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 20, L"%#lx", n) );
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 20, L"%lX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 20, L"%lx", n) );
					}
				}
			}
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, wchar_t, unsigned long int>{
	public:
		static void printout(basic_ostream<wchar_t, traits >& stream, const unsigned long int n)
		{
			wchar_t buffer[20];
			if( stream.flags() & ios_base::dec){
				stream.printout(buffer, swprintf(buffer, 20, L"%lu", n));
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					stream.printout(buffer, swprintf(buffer, 20, L"%#lo", n));
				}else{
					stream.printout(buffer, swprintf(buffer, 20, L"%lo", n) );
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 20, L"%#lX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 20, L"%#lx", n) );
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 20, L"%lX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 20, L"%lx", n) );
					}
				}
			}
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

#ifndef __STRICT_ANSI__

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, wchar_t, signed long long int>{
	public:
		static void printout(basic_ostream<wchar_t, traits >& stream, const signed long long int n)
		{
			wchar_t buffer[28];
			if( stream.flags() & ios_base::dec){
				stream.printout(buffer, swprintf(buffer, 27, L"%lld", n));
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					stream.printout(buffer, swprintf(buffer, 27, L"%#llo", n));
				}else{
					stream.printout(buffer, swprintf(buffer, 27, L"%llo", n) );
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 27, L"%#llX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 27, L"%#llx", n) );
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 27, L"%llX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 27, L"%llx", n) );
					}
				}
			}
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, wchar_t, unsigned long long int>{
	public:
		static void printout(basic_ostream<wchar_t, traits >& stream, const unsigned long long int n)
		{
			wchar_t buffer[28];
			if( stream.flags() & ios_base::dec){
				stream.printout(buffer, swprintf(buffer, 27, L"%llu", n));
			}else if( stream.flags() & ios_base::oct){
				if( stream.flags() & ios_base::showbase){
					stream.printout(buffer, swprintf(buffer, 27, L"%#llo", n));
				}else{
					stream.printout(buffer, swprintf(buffer, 27, L"%llo", n) );
				}
			}else if (stream.flags() & ios_base::hex){
				if(stream.flags() & ios_base::showbase){
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 27, L"%#llX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 27, L"%#llx", n) );
					}
				}else{
					if(stream.flags() & ios_base::uppercase){
						stream.printout(buffer, swprintf(buffer, 27, L"%llX", n) );
					}else{
						stream.printout(buffer, swprintf(buffer, 27, L"%llx", n) );
					}
				}
			}
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};


#endif	//__STRICT_ANSI__

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, wchar_t, double>{
	public:
		static void printout(basic_ostream<wchar_t, traits >& stream, const double f)
		{
			wchar_t buffer[32];
			wchar_t format_string[32];
			if(stream.flags() & ios_base::scientific){
				if(stream.flags() & ios_base::uppercase){
					swprintf(format_string, 32, L"%%%u.%uE", static_cast<int>(stream.width()), static_cast<unsigned int>(stream.precision()));
				}else{
					swprintf(format_string, 32, L"%%%u.%ue", static_cast<int>(stream.width()), static_cast<unsigned int>(stream.precision()));
				}
			} else if(stream.flags() & ios_base::fixed){
				swprintf(format_string, 32, L"%%%u.%uf", static_cast<int>(stream.width()), static_cast<unsigned int>(stream.precision()));
			} else {
				swprintf(format_string, 32, L"%%%u.%ug", static_cast<int>(stream.width()), static_cast<unsigned int>(stream.precision()));
			}
			stream.printout(buffer, swprintf(buffer, 32, format_string, f) );
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

	template <class traits> class _UCXXEXPORT __ostream_printout<traits, wchar_t, long double>{
	public:
		static void printout(basic_ostream<wchar_t, traits >& stream, const long double f)
		{
			wchar_t buffer[32];
			wchar_t format_string[32];
			if(stream.flags() & ios_base::scientific){
				if(stream.flags() & ios_base::uppercase){
					swprintf(format_string, 32, L"%%%u.%uLE", static_cast<unsigned int>(stream.width()), static_cast<unsigned int>(stream.precision()));
				}else{
					swprintf(format_string, 32, L"%%%u.%uLe", static_cast<unsigned int>(stream.width()), static_cast<unsigned int>(stream.precision()));
				}
			} else if(stream.flags() & ios_base::fixed){
				swprintf(format_string, 32, L"%%%u.%uLf", static_cast<unsigned int>(stream.width()), static_cast<unsigned int>(stream.precision()));
			} else {
				swprintf(format_string, 32, L"%%%u.%uLg", static_cast<unsigned int>(stream.width()), static_cast<unsigned int>(stream.precision()));
			}
			stream.printout(buffer, swprintf(buffer, 32, format_string, f) );
			if(stream.flags() & ios_base::unitbuf){
				stream.flush();
			}
		}
	};

#endif //__UCLIBCXX_HAS_WCHAR__

}

#pragma GCC visibility pop

#endif