1 | // This file is a part of Framsticks SDK. http://www.framsticks.com/ |
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2 | // Copyright (C) 1999-2015 Maciej Komosinski and Szymon Ulatowski. |
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3 | // See LICENSE.txt for details. |
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4 | |
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5 | #ifndef _EXTVALUE_H_ |
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6 | #define _EXTVALUE_H_ |
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7 | |
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8 | #include "sstring.h" |
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9 | #include <frams/param/param.h> |
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10 | #include <common/nonstd_stl.h> |
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11 | #include <common/threads.h> |
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12 | |
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13 | #define EXTVALUEUNION |
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14 | template <int A, int B> struct CompileTimeMax { enum { val = A > B ? A : B }; }; |
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15 | #define EXTVALUEUNIONSIZE CompileTimeMax<sizeof(ExtObject),sizeof(SString)>::val |
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16 | |
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17 | enum ExtPType |
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18 | { |
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19 | TUnknown = 0, TInt, TDouble, TString, TObj, TInvalid |
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20 | }; |
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21 | |
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22 | /** |
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23 | destructable object |
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24 | */ |
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25 | class DestrBase |
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26 | { |
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27 | public: |
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28 | int refcount; |
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29 | DestrBase() :refcount(0) {} |
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30 | void incref() { refcount++; } |
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31 | void decref() { refcount--; if (refcount == 0) delete this; } |
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32 | virtual ~DestrBase() {} |
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33 | }; |
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34 | |
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35 | /** |
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36 | object reference. |
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37 | */ |
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38 | class ExtObject |
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39 | { |
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40 | int subtype; //< 0/1=Generic/DPC Object, 0/2=Standalone/Shared Param |
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41 | void incref() const; |
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42 | void decref() const; |
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43 | public: |
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44 | union { |
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45 | void* object; //< generic object, will use param |
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46 | DestrBase *dbobject; //< object with refcounting, will be deleted if refcount goes to 0 |
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47 | }; |
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48 | union { |
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49 | Param* param; //< if object!=0 |
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50 | ParamInterface *paraminterface; //< if object==0 |
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51 | }; |
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52 | |
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53 | void copyFrom(const ExtObject& src) { subtype = src.subtype; object = src.object; param = src.param; } |
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54 | |
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55 | void* operator new(size_t s, void* mem){ return mem; } |
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56 | #ifdef _MSC_VER |
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57 | void operator delete(void* mem, void* t) {} |
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58 | #endif |
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59 | void* operator new(size_t s){ return malloc(sizeof(ExtObject)); } |
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60 | void operator delete(void* mem) { free(mem); } |
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61 | ///@param tmp_param can be used for temporary storage, the result ParamInterface* is only valid for as long as tmp_param is valid |
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62 | ParamInterface *getParamInterface(Param &tmp_param) const { if (subtype & 2){ tmp_param.setParamTab(param->getParamTab()); tmp_param.select(object); return &tmp_param; } return paraminterface; } |
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63 | const char* interfaceName() const { if (isEmpty()) return "Empty"; return (subtype & 2) ? param->getName() : paraminterface->getName(); } |
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64 | bool matchesInterfaceName(ParamInterface* pi) const { return !strcmp(interfaceName(), pi->getName()); } |
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65 | void* getTarget() const { return (subtype & 1) ? dbobject : object; } |
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66 | void* getTarget(const char* classname, bool through_barrier = true, bool warn = true) const; |
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67 | void setEmpty() { decref(); subtype = 0; param = NULL; object = NULL; } |
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68 | int isEmpty() const { return !param; } |
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69 | static const ExtObject& empty() { static const ExtObject& e((ParamInterface*)NULL); return e; } |
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70 | ExtObject(const ExtObject& src) { src.incref(); copyFrom(src); } |
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71 | void operator=(const ExtObject& src) { src.incref(); decref(); copyFrom(src); } |
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72 | bool makeUnique();//< @return false if nothing has changed |
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73 | |
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74 | bool operator==(const ExtObject& src) const; |
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75 | |
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76 | SString toString() const; |
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77 | SString serialize_inner() const; |
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78 | SString serialize() const; |
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79 | |
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80 | ExtObject(Param *p, void *o) :subtype(2), object(o), param(p){} |
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81 | ExtObject(ParamInterface *p = 0) :subtype(0), object(0), paraminterface(p){} |
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82 | ExtObject(Param *p, DestrBase *o) :subtype(1 + 2), dbobject(o), param(p){ incref(); } |
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83 | ExtObject(ParamInterface *p, DestrBase *o) :subtype(1), dbobject(o), paraminterface(p){ incref(); } |
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84 | |
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85 | ~ExtObject(){ decref(); } |
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86 | |
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87 | class Serialization |
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88 | { |
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89 | std::vector<ExtObject> refs; |
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90 | int level; |
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91 | public: |
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92 | Serialization() :level(0) {} |
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93 | void begin(); |
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94 | void end(); |
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95 | int add(const ExtObject& o); |
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96 | void replace(const ExtObject& o, const ExtObject& other); |
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97 | void remove(const ExtObject& o); |
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98 | const ExtObject* get(int ref); |
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99 | }; |
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100 | |
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101 | static THREAD_LOCAL_DECL(Serialization, serialization); |
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102 | }; |
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103 | |
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104 | class ExtValue |
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105 | { |
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106 | public: |
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107 | ExtPType type; |
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108 | #ifdef EXTVALUEUNION |
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109 | long data[(EXTVALUEUNIONSIZE + sizeof(long) - 1) / sizeof(long)]; |
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110 | paInt& idata() const { return (paInt&)data[0]; }; |
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111 | double& ddata() const { return *(double*)data; }; |
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112 | ExtObject& odata() const { return *(ExtObject*)data; }; |
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113 | SString& sdata() const { return *(SString*)data; }; |
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114 | #else |
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115 | union { |
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116 | paInt i; |
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117 | double d; |
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118 | SString *s; |
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119 | ExtObject *o; |
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120 | }; |
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121 | paInt& idata() const {return (paInt&)i;}; |
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122 | double& ddata() const {return (double&)d;}; |
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123 | ExtObject& odata() const {return *o;}; |
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124 | SString& sdata() const {return *s;}; |
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125 | #endif |
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126 | |
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127 | void* operator new(size_t s, void* mem){ return mem; } |
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128 | void* operator new(size_t s){ return ::operator new(s); } |
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129 | |
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130 | ExtValue() :type(TUnknown){} |
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131 | ~ExtValue() { setEmpty(); } |
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132 | ExtValue(paInt v) { seti(v); } |
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133 | ExtValue(double v) { setd(v); } |
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134 | ExtValue(const SString &v) { sets(v); } |
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135 | ExtValue(const ExtObject &srco) { seto(srco); } |
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136 | static ExtValue invalid() { ExtValue v; v.setInvalid(); return v; } |
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137 | static const ExtValue& empty() { static const ExtValue v; return v; } |
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138 | static const ExtValue& zero() { static const ExtValue v(0); return v; } |
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139 | |
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140 | enum CompareResult |
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141 | { |
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142 | ResultLower = -1, ResultEqual = 0, ResultHigher = 1, |
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143 | ResultEqualUnordered, |
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144 | ResultUnequal_RelaxedEqual, |
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145 | ResultUnequal_RelaxedUnequal, |
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146 | ResultMismatch_RelaxedUnequal, |
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147 | ResultMismatch |
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148 | }; |
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149 | // performs all script value comparisons. |
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150 | // relaxed comparison (internal use only, not available in scripts) works like regular == with additional null~=0, notnull!~0 |
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151 | // and is used for pseudo-boolean conversion allowing for expressions like "if (null) ..." |
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152 | CompareResult compare(const ExtValue& src) const; |
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153 | |
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154 | enum CmpOperator { CmpFIRST, CmpEQ = CmpFIRST, CmpNE, CmpGE, CmpLE, CmpGT, CmpLT,/*relaxed (not)equal*/CmpREQ, CmpRNE }; |
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155 | static const char* cmp_op_names[]; |
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156 | struct CmpContext { const ExtValue *v1, *v2; }; |
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157 | // interpret compare() result, optional context controls error messages |
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158 | // @return 0=false, 1=true, -1=undefined (null in script) |
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159 | static int interpretCompare(CmpOperator op, CompareResult result, CmpContext *context = NULL); |
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160 | |
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161 | void divInt(paInt a); |
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162 | void divDouble(double a); |
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163 | |
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164 | int operator==(const ExtValue& src) const; |
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165 | void operator+=(const ExtValue& src); |
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166 | void operator-=(const ExtValue& src); |
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167 | void operator*=(const ExtValue& src); |
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168 | void operator/=(const ExtValue& src); |
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169 | void operator%=(const ExtValue& src); |
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170 | void operator=(const ExtValue& src) |
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171 | { |
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172 | setr(src); |
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173 | } |
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174 | ExtValue(const ExtValue& src) |
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175 | :type(TUnknown) { |
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176 | set(src); |
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177 | } |
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178 | void setEmpty(); |
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179 | void setInvalid() { setEmpty(); type = TInvalid; } |
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180 | bool makeUnique() { return (type == TObj) && odata().makeUnique(); } //< @return false if nothing has changed |
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181 | ExtPType getType() const { return type; } |
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182 | void *getObjectTarget(const char* classname, bool warn = true) const; |
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183 | void setInt(paInt v) { if (type != TInt) setri(v); else idata() = v; } |
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184 | void setDouble(double v) { if (type != TDouble) setrd(v); else ddata() = v; } |
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185 | void setString(const SString &v) { if (type != TString) setrs(v); else sdata() = v; } |
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186 | void setObject(const ExtObject &src) { if (type != TObj) setro(src); else odata() = src; } |
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187 | static bool parseInt(const char* s, paInt &result, bool strict, bool error); |
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188 | static bool parseDouble(const char* s, double &result, bool error); |
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189 | static paInt getInt(const char* s, bool strict = false);//< @param strict=true will fail on floating point |
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190 | static double getDouble(const char* s); |
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191 | paInt getInt() const; |
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192 | double getDouble() const; |
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193 | SString getString() const; |
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194 | const SString* getStringPtr() const;//< @return pointer to the internal sstring object or NULL if the current type is not string |
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195 | SString serialize() const; |
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196 | ExtObject getObject() const; |
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197 | bool isNull() const { return (type == TUnknown) || ((type == TObj) && odata().isEmpty()); } |
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198 | SString typeDescription() const;//< @return human readable type name (used in error messages) |
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199 | SString typeAndValue() const;//< @return type and value (used in error messages) |
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200 | const char* parseNumber(const char* in, ExtPType strict_type = TUnknown); |
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201 | const char* deserialize(const char* in);//< @return first character after the succesfully parsed string or NULL if failed |
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202 | const char* deserialize_inner(const char* in); |
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203 | static ParamInterface *findDeserializableClass(const char* name); |
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204 | static PtrListTempl<ParamInterface*> &getDeserializableClasses(); |
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205 | template<typename T> class AddDeserializable |
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206 | { |
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207 | public: |
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208 | AddDeserializable() { ExtValue::getDeserializableClasses() += &T::getStaticParam(); } |
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209 | }; |
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210 | |
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211 | static SString format(SString& fmt, const ExtValue **values, int count); |
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212 | |
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213 | ExtValue getExtType(); |
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214 | |
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215 | private: // setrx - release and set, setx - assume released |
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216 | void setr(const ExtValue& src){ setEmpty(); set(src); } |
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217 | void set(const ExtValue& src); |
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218 | void setri(paInt v) { setEmpty(); seti(v); } |
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219 | void setrd(double v) { setEmpty(); setd(v); } |
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220 | void seti(paInt v) { type = TInt; idata() = v; } |
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221 | void setd(double v) { type = TDouble; ddata() = v; } |
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222 | #ifdef EXTVALUEUNION |
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223 | void setrs(const SString &v) { setEmpty(); sets(v); } |
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224 | void setro(const ExtObject &src) { setEmpty(); seto(src); } |
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225 | void sets(const SString &v) { type = TString; new(data)SString(v); } |
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226 | void seto(const ExtObject &src) { type = TObj; new(data)ExtObject(src); } |
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227 | #else |
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228 | void setrs(const SString &v) {setEmpty();sets(v);} |
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229 | void setro(const ExtObject &src) {setEmpty();seto(src);} |
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230 | void sets(const SString &v) {type=TString;s=new SString(v);} |
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231 | void seto(const ExtObject &src) {type=TObj;o=new ExtObject(src);} |
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232 | #endif |
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233 | |
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234 | }; |
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235 | |
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236 | #define REGISTER_DESERIALIZABLE(name) ExtValue::AddDeserializable<name> deserializable_autoinit_ ## name; |
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237 | |
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238 | #endif |
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