emitter.h

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#ifndef EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66_PM
#define EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66_PM

#if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
#pragma once
#endif


#include "yaml-cpp-pm/dll.h"
#include "yaml-cpp-pm/binary.h"
#include "yaml-cpp-pm/emittermanip.h"
#include "yaml-cpp-pm/ostream.h"
#include "yaml-cpp-pm/noncopyable.h"
#include "yaml-cpp-pm/null.h"
#include <memory>
#include <string>
#include <sstream>

namespace YAML_PM
{
        class EmitterState;
        
        class YAML_CPP_API Emitter: private noncopyable
        {
        public:
                Emitter();
                ~Emitter();
                
                // output
                const char *c_str() const;
                unsigned size() const;
                
                // state checking
                bool good() const;
                const std::string GetLastError() const;
                
                // global setters
                bool SetOutputCharset(EMITTER_MANIP value);
                bool SetStringFormat(EMITTER_MANIP value);
                bool SetBoolFormat(EMITTER_MANIP value);
                bool SetIntBase(EMITTER_MANIP value);
                bool SetSeqFormat(EMITTER_MANIP value);
                bool SetMapFormat(EMITTER_MANIP value);
                bool SetIndent(unsigned n);
                bool SetPreCommentIndent(unsigned n);
                bool SetPostCommentIndent(unsigned n);
        bool SetFloatPrecision(unsigned n);
        bool SetDoublePrecision(unsigned n);
                
                // local setters
                Emitter& SetLocalValue(EMITTER_MANIP value);
                Emitter& SetLocalIndent(const _Indent& indent);
        Emitter& SetLocalPrecision(const _Precision& precision);
                
                // overloads of write
                Emitter& Write(const std::string& str);
                Emitter& Write(bool b);
                Emitter& Write(char ch);
                Emitter& Write(const _Alias& alias);
                Emitter& Write(const _Anchor& anchor);
                Emitter& Write(const _Tag& tag);
                Emitter& Write(const _Comment& comment);
                Emitter& Write(const _Null& null);
                Emitter& Write(const Binary& binary);
                
                template <typename T>
                Emitter& WriteIntegralType(T value);
                
                template <typename T>
                Emitter& WriteStreamable(T value);

        private:
                void PreWriteIntegralType(std::stringstream& str);
                void PreWriteStreamable(std::stringstream& str);
                void PostWriteIntegralType(const std::stringstream& str);
                void PostWriteStreamable(const std::stringstream& str);
        
        template<typename T> void SetStreamablePrecision(std::stringstream&) {}
        unsigned GetFloatPrecision() const;
        unsigned GetDoublePrecision() const;
        
        private:
                void PreAtomicWrite();
                bool GotoNextPreAtomicState();
                void PostAtomicWrite();
                void EmitSeparationIfNecessary();
                
                void EmitBeginDoc();
                void EmitEndDoc();
                void EmitBeginSeq();
                void EmitEndSeq();
                void EmitBeginMap();
                void EmitEndMap();
                void EmitKey();
                void EmitValue();
                void EmitNewline();
                void EmitKindTag();
                void EmitTag(bool verbatim, const _Tag& tag);
                
                const char *ComputeFullBoolName(bool b) const;
                bool CanEmitNewline() const;
                
        private:
                ostream m_stream;
                std::auto_ptr <EmitterState> m_pState;
        };
        
        template <typename T>
        inline Emitter& Emitter::WriteIntegralType(T value)
        {
                if(!good())
                        return *this;
                
                std::stringstream str;
                PreWriteIntegralType(str);
                str << value;
                PostWriteIntegralType(str);
                return *this;
        }

        template <typename T>
        inline Emitter& Emitter::WriteStreamable(T value)
        {
                if(!good())
                        return *this;
                
                std::stringstream str;
                PreWriteStreamable(str);
        SetStreamablePrecision<T>(str);
                str << value;
                PostWriteStreamable(str);
                return *this;
        }
        
    template<>
    inline void Emitter::SetStreamablePrecision<float>(std::stringstream& str)
    {
                str.precision(GetFloatPrecision());
    }

    template<>
    inline void Emitter::SetStreamablePrecision<double>(std::stringstream& str)
    {
                str.precision(GetDoublePrecision());
    }

        // overloads of insertion
        inline Emitter& operator << (Emitter& emitter, const std::string& v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, bool v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, char v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, unsigned char v) { return emitter.Write(static_cast<char>(v)); }
        inline Emitter& operator << (Emitter& emitter, const _Alias& v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, const _Anchor& v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, const _Tag& v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, const _Comment& v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, const _Null& v) { return emitter.Write(v); }
        inline Emitter& operator << (Emitter& emitter, const Binary& b) { return emitter.Write(b); }

        inline Emitter& operator << (Emitter& emitter, const char *v) { return emitter.Write(std::string(v)); }

        inline Emitter& operator << (Emitter& emitter, int v) { return emitter.WriteIntegralType(v); }
        inline Emitter& operator << (Emitter& emitter, unsigned int v) { return emitter.WriteIntegralType(v); }
        inline Emitter& operator << (Emitter& emitter, short v) { return emitter.WriteIntegralType(v); }
        inline Emitter& operator << (Emitter& emitter, unsigned short v) { return emitter.WriteIntegralType(v); }
        inline Emitter& operator << (Emitter& emitter, long v) { return emitter.WriteIntegralType(v); }
        inline Emitter& operator << (Emitter& emitter, unsigned long v) { return emitter.WriteIntegralType(v); }
        inline Emitter& operator << (Emitter& emitter, long long v) { return emitter.WriteIntegralType(v); }
        inline Emitter& operator << (Emitter& emitter, unsigned long long v) { return emitter.WriteIntegralType(v); }

        inline Emitter& operator << (Emitter& emitter, float v) { return emitter.WriteStreamable(v); }
        inline Emitter& operator << (Emitter& emitter, double v) { return emitter.WriteStreamable(v); }

        inline Emitter& operator << (Emitter& emitter, EMITTER_MANIP value) {
                return emitter.SetLocalValue(value);
        }
        
        inline Emitter& operator << (Emitter& emitter, _Indent indent) {
                return emitter.SetLocalIndent(indent);
        }
    
    inline Emitter& operator << (Emitter& emitter, _Precision precision) {
        return emitter.SetLocalPrecision(precision);
    }
}

#endif // EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66_PM