00001 #ifndef PROTON_INTERNAL_SCALAR_BASE_HPP
00002 #define PROTON_INTERNAL_SCALAR_BASE_HPP
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00025 #include "../binary.hpp"
00026 #include "../decimal.hpp"
00027 #include "../error.hpp"
00028 #include "./export.hpp"
00029 #include "./comparable.hpp"
00030 #include "./type_traits.hpp"
00031 #include "../symbol.hpp"
00032 #include "../timestamp.hpp"
00033 #include "../type_id.hpp"
00034 #include "../types_fwd.hpp"
00035 #include "../uuid.hpp"
00036
00037 #include <iosfwd>
00038 #include <string>
00039 #include <typeinfo>
00040
00041 namespace proton {
00042 class message;
00043
00044 namespace codec {
00045 class decoder;
00046 class encoder;
00047 }
00048
00049 namespace internal {
00050
00051 class scalar_base;
00052 template<class T> T get(const scalar_base& s);
00053
00055 class scalar_base : private comparable<scalar_base> {
00056 public:
00058 PN_CPP_EXTERN type_id type() const;
00059
00060
00061
00064 template <class T> void get(T& x) const { get_(x); }
00065 template <class T> T get() const { T x; get_(x); return x; }
00067
00069 friend PN_CPP_EXTERN bool operator<(const scalar_base& x, const scalar_base& y);
00071 friend PN_CPP_EXTERN bool operator==(const scalar_base& x, const scalar_base& y);
00073 friend PN_CPP_EXTERN std::ostream& operator<<(std::ostream& o, const scalar_base& x);
00074
00075 protected:
00076 PN_CPP_EXTERN scalar_base(const pn_atom_t& a);
00077 PN_CPP_EXTERN scalar_base();
00078 PN_CPP_EXTERN scalar_base(const scalar_base&);
00079 PN_CPP_EXTERN scalar_base& operator=(const scalar_base&);
00080
00081 PN_CPP_EXTERN void put_(bool);
00082 PN_CPP_EXTERN void put_(uint8_t);
00083 PN_CPP_EXTERN void put_(int8_t);
00084 PN_CPP_EXTERN void put_(uint16_t);
00085 PN_CPP_EXTERN void put_(int16_t);
00086 PN_CPP_EXTERN void put_(uint32_t);
00087 PN_CPP_EXTERN void put_(int32_t);
00088 PN_CPP_EXTERN void put_(uint64_t);
00089 PN_CPP_EXTERN void put_(int64_t);
00090 PN_CPP_EXTERN void put_(wchar_t);
00091 PN_CPP_EXTERN void put_(float);
00092 PN_CPP_EXTERN void put_(double);
00093 PN_CPP_EXTERN void put_(timestamp);
00094 PN_CPP_EXTERN void put_(const decimal32&);
00095 PN_CPP_EXTERN void put_(const decimal64&);
00096 PN_CPP_EXTERN void put_(const decimal128&);
00097 PN_CPP_EXTERN void put_(const uuid&);
00098 PN_CPP_EXTERN void put_(const std::string&);
00099 PN_CPP_EXTERN void put_(const symbol&);
00100 PN_CPP_EXTERN void put_(const binary&);
00101 PN_CPP_EXTERN void put_(const char* s);
00102 PN_CPP_EXTERN void put_(const null&);
00103
00104 template<class T> void put(const T& x) { putter<T>::put(*this, x); }
00105
00106 private:
00107 PN_CPP_EXTERN void get_(bool&) const;
00108 PN_CPP_EXTERN void get_(uint8_t&) const;
00109 PN_CPP_EXTERN void get_(int8_t&) const;
00110 PN_CPP_EXTERN void get_(uint16_t&) const;
00111 PN_CPP_EXTERN void get_(int16_t&) const;
00112 PN_CPP_EXTERN void get_(uint32_t&) const;
00113 PN_CPP_EXTERN void get_(int32_t&) const;
00114 PN_CPP_EXTERN void get_(uint64_t&) const;
00115 PN_CPP_EXTERN void get_(int64_t&) const;
00116 PN_CPP_EXTERN void get_(wchar_t&) const;
00117 PN_CPP_EXTERN void get_(float&) const;
00118 PN_CPP_EXTERN void get_(double&) const;
00119 PN_CPP_EXTERN void get_(timestamp&) const;
00120 PN_CPP_EXTERN void get_(decimal32&) const;
00121 PN_CPP_EXTERN void get_(decimal64&) const;
00122 PN_CPP_EXTERN void get_(decimal128&) const;
00123 PN_CPP_EXTERN void get_(uuid&) const;
00124 PN_CPP_EXTERN void get_(std::string&) const;
00125 PN_CPP_EXTERN void get_(symbol&) const;
00126 PN_CPP_EXTERN void get_(binary&) const;
00127 PN_CPP_EXTERN void get_(null&) const;
00128
00129
00130 template <class T, class Enable=void> struct putter {
00131 static void put(scalar_base& s, const T& x) { s.put_(x); }
00132 };
00133 template <class T> struct putter<T, typename enable_if<is_unknown_integer<T>::value>::type> {
00134 static void put(scalar_base& s, const T& x) { s.put_(static_cast<typename known_integer<T>::type>(x)); }
00135 };
00136 template <class T, class Enable=void> struct getter {
00137 static T get(const scalar_base& s) { T x; s.get_(x); return x; }
00138 };
00139 template <class T> struct getter<T, typename enable_if<is_unknown_integer<T>::value>::type> {
00140 static T get(const scalar_base& s) { typename known_integer<T>::type x; s.get_(x); return x; }
00141 };
00142
00143 void ok(pn_type_t) const;
00144 void set(const pn_atom_t&);
00145 void set(const binary& x, pn_type_t t);
00146
00147 pn_atom_t atom_;
00148 binary bytes_;
00149
00151 friend class proton::message;
00152 friend class codec::encoder;
00153 friend class codec::decoder;
00154 template<class T> friend T get(const scalar_base& s) { return scalar_base::getter<T>::get(s); }
00156 };
00157
00158 template <class R, class F> R visit(const scalar_base& s, F f) {
00159 switch(s.type()) {
00160 case BOOLEAN: return f(s.get<bool>());
00161 case UBYTE: return f(s.get<uint8_t>());
00162 case BYTE: return f(s.get<int8_t>());
00163 case USHORT: return f(s.get<uint16_t>());
00164 case SHORT: return f(s.get<int16_t>());
00165 case UINT: return f(s.get<uint32_t>());
00166 case INT: return f(s.get<int32_t>());
00167 case CHAR: return f(s.get<wchar_t>());
00168 case ULONG: return f(s.get<uint64_t>());
00169 case LONG: return f(s.get<int64_t>());
00170 case TIMESTAMP: return f(s.get<timestamp>());
00171 case FLOAT: return f(s.get<float>());
00172 case DOUBLE: return f(s.get<double>());
00173 case DECIMAL32: return f(s.get<decimal32>());
00174 case DECIMAL64: return f(s.get<decimal64>());
00175 case DECIMAL128: return f(s.get<decimal128>());
00176 case UUID: return f(s.get<uuid>());
00177 case BINARY: return f(s.get<binary>());
00178 case STRING: return f(s.get<std::string>());
00179 case SYMBOL: return f(s.get<symbol>());
00180 default: throw conversion_error("invalid scalar type "+type_name(s.type()));
00181 }
00182 }
00183
00184 PN_CPP_EXTERN conversion_error make_coercion_error(const char* cpp_type, type_id amqp_type);
00185
00186 template<class T> struct coerce_op {
00187 template <class U>
00188 typename enable_if<is_convertible<U, T>::value, T>::type operator()(const U& x) {
00189 return static_cast<T>(x);
00190 }
00191 template <class U>
00192 typename enable_if<!is_convertible<U, T>::value, T>::type operator()(const U&) {
00193 throw make_coercion_error(typeid(T).name(), type_id_of<U>::value);
00194 }
00195 };
00196
00197 template <class T> T coerce(const scalar_base& s) { return visit<T>(s, coerce_op<T>()); }
00198
00199 }
00200
00202 PN_CPP_EXTERN std::string to_string(const internal::scalar_base& x);
00203
00204 }
00205
00206 #endif // PROTON_INTERNAL_SCALAR_BASE_HPP