1 | #include <iostream> |
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2 | #include <string> |
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3 | #include <sstream> |
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4 | #include <stdlib.h> |
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5 | #include <errno.h> |
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6 | |
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7 | #ifndef _RpDICT_H |
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8 | #include "RpDict.h" |
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9 | #endif |
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10 | |
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11 | #include "RpUnitsStd.h" |
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12 | |
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13 | #ifndef _RpUNITS_H |
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14 | #define _RpUNITS_H |
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15 | |
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16 | class RpUnits; |
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17 | |
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18 | class unit |
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19 | { |
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20 | |
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21 | public: |
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22 | |
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23 | const std::string getUnits(){ return units; }; |
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24 | double getExponent() {return exponent;}; |
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25 | RpUnits * getBasis() {return basis;}; |
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26 | |
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27 | friend class RpUnits; |
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28 | |
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29 | private: |
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30 | const std::string units; |
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31 | double exponent; |
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32 | // RpUnits* basis[4]; |
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33 | RpUnits* basis; |
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34 | |
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35 | unit* prev; |
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36 | unit* next; |
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37 | |
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38 | unit ( |
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39 | const std::string& units, |
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40 | double& exponent, |
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41 | // RpUnits** basis, |
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42 | RpUnits* basis, |
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43 | unit* next |
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44 | ) |
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45 | : units (units), |
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46 | exponent (exponent), |
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47 | basis (basis), |
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48 | prev (NULL), |
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49 | next (next) |
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50 | { }; |
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51 | |
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52 | |
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53 | void newExponent(double newExponent) {exponent = newExponent;}; |
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54 | |
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55 | |
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56 | }; |
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57 | |
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58 | // simple class to hold info about a conversion. |
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59 | // holds where we are converting from |
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60 | // holds where we are converting to |
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61 | // hold the pointer to a function to do the forward conversion (from->to) |
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62 | // hold the pointer to a function to do the backward conversion (to->from) |
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63 | // |
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64 | class conversion |
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65 | { |
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66 | public: |
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67 | |
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68 | const RpUnits* getFrom() { return (const RpUnits*) fromPtr; }; |
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69 | const RpUnits* getTo() { return (const RpUnits*) toPtr; }; |
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70 | |
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71 | friend class RpUnits; |
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72 | |
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73 | private: |
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74 | |
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75 | RpUnits* fromPtr; |
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76 | RpUnits* toPtr; |
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77 | double (*convForwFxnPtr)(double); |
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78 | double (*convBackFxnPtr)(double); |
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79 | void* (*convForwFxnPtrVoid)(void*, void*); |
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80 | void* convForwData; |
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81 | void* (*convBackFxnPtrVoid)(void*, void*); |
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82 | void* convBackData; |
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83 | |
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84 | conversion* prev; |
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85 | conversion* next; |
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86 | |
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87 | // constructor |
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88 | // private because i only want RpUnits to be able to |
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89 | // create a conversion |
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90 | conversion ( |
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91 | RpUnits* fromPtr, |
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92 | RpUnits* toPtr, |
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93 | double (*convForwFxnPtr)(double), |
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94 | double (*convBackFxnPtr)(double), |
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95 | conversion* prev, |
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96 | conversion* next |
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97 | ) |
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98 | : fromPtr (fromPtr), |
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99 | toPtr (toPtr), |
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100 | convForwFxnPtr (convForwFxnPtr), |
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101 | convBackFxnPtr (convBackFxnPtr), |
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102 | convForwFxnPtrVoid (NULL), |
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103 | convForwData (NULL), |
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104 | convBackFxnPtrVoid (NULL), |
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105 | convBackData (NULL), |
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106 | prev (prev), |
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107 | next (next) |
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108 | { |
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109 | }; |
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110 | |
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111 | conversion ( |
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112 | RpUnits* fromPtr, |
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113 | RpUnits* toPtr, |
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114 | void* (*convForwFxnPtrVoid)(void*, void*), |
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115 | void* convForwData, |
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116 | void* (*convBackFxnPtrVoid)(void*, void*), |
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117 | void* convBackData, |
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118 | conversion* prev, |
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119 | conversion* next |
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120 | ) |
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121 | : fromPtr (fromPtr), |
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122 | toPtr (toPtr), |
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123 | convForwFxnPtr (NULL), |
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124 | convBackFxnPtr (NULL), |
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125 | convForwFxnPtrVoid (convForwFxnPtrVoid), |
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126 | convForwData (convForwData), |
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127 | convBackFxnPtrVoid (convBackFxnPtrVoid), |
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128 | convBackData (convBackData), |
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129 | prev (prev), |
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130 | next (next) |
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131 | { |
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132 | }; |
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133 | |
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134 | // copy constructor |
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135 | |
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136 | // destructor |
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137 | }; |
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138 | |
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139 | // used by the RpUnits class to create a linked list of the conversions |
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140 | // associated with the specific unit. |
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141 | // |
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142 | // we could templitize this and make a generic linked list |
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143 | // or could use generic linked list class from book programming with objects |
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144 | // |
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145 | class convEntry |
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146 | { |
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147 | |
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148 | public: |
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149 | |
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150 | friend class RpUnits; |
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151 | |
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152 | private: |
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153 | |
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154 | conversion* conv; |
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155 | convEntry* prev; |
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156 | convEntry* next; |
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157 | |
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158 | convEntry ( |
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159 | conversion* conv, |
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160 | convEntry* prev, |
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161 | convEntry* next |
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162 | ) |
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163 | : conv (conv), |
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164 | prev (prev), |
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165 | next (next) |
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166 | { }; |
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167 | |
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168 | /* |
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169 | ~convEntry() |
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170 | { |
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171 | |
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172 | } |
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173 | */ |
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174 | }; |
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175 | |
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176 | class RpUnits |
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177 | { |
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178 | /* |
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179 | * helpful units site |
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180 | * http://aurora.regenstrief.org/~gunther/units.html |
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181 | */ |
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182 | |
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183 | public: |
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184 | |
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185 | // users member fxns |
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186 | std::string getUnits(); |
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187 | std::string getUnitsName(); |
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188 | double getExponent(); |
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189 | RpUnits* getBasis(); |
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190 | |
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191 | // convert from one RpUnits to another if the conversion is defined |
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192 | double convert(RpUnits* toUnits, double val, int* result = NULL); |
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193 | // convert from one RpUnits to another if the conversion is defined |
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194 | void* convert(RpUnits* toUnits, void* val, int* result = NULL); |
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195 | // convert from one RpUnits to another if the conversion is defined |
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196 | double convert(std::string, double val); |
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197 | // convert from one RpUnits to another if the conversion is defined |
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198 | std::string convert ( RpUnits* toUnits, |
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199 | double val, |
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200 | int showUnits = 0, |
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201 | int* result = NULL ); |
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202 | |
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203 | static std::string convert ( std::string val, |
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204 | std::string toUnits, |
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205 | int showUnits, |
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206 | int* result = NULL ); |
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207 | |
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208 | // dictionary to store the units. |
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209 | // static RpDict<std::string,RpUnits> dict; |
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210 | |
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211 | // turn the current unit to the metric system |
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212 | // this should only be used for units that are part of the |
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213 | // metric system. doesnt deal with exponents, just prefixes |
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214 | double makeBasis(double value, int* result = NULL); |
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215 | RpUnits & makeBasis(double* value, int* result = NULL); |
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216 | |
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217 | static int makeMetric(RpUnits * basis); |
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218 | |
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219 | // find an RpUnits object that should exist in RpUnitsTable |
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220 | // returns 0 on success (object was found) |
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221 | // returns !0 on failure (object not found) |
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222 | static RpUnits* find(std::string key) |
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223 | { |
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224 | // dict.find seems to return a (RpUnits* const) so i had to |
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225 | // cast it as a (RpUnits*) |
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226 | |
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227 | // dict pointer |
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228 | // RpUnits* unitEntry = (RpUnits*) *(dict.find(key).getValue()); |
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229 | RpUnits* unitEntry = (RpUnits*) *(dict->find(key).getValue()); |
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230 | |
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231 | // RpUnits* unitEntry = (RpUnits*) dEntr.getValue(); |
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232 | |
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233 | // dict pointer |
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234 | // if (unitEntry == (RpUnits*)dict.getNullEntry().getValue()) { |
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235 | if (unitEntry == (RpUnits*)dict->getNullEntry().getValue()) { |
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236 | unitEntry = NULL; |
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237 | } |
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238 | |
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239 | return unitEntry; |
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240 | }; |
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241 | |
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242 | // user calls define to add a RpUnits object or to add a relation rule |
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243 | // |
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244 | // add RpUnits Object |
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245 | static RpUnits * define(const std::string units, RpUnits * basis); |
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246 | // |
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247 | // add relation rule |
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248 | |
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249 | static RpUnits * define(RpUnits* from, |
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250 | RpUnits* to, |
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251 | double (*convForwFxnPtr)(double), |
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252 | double (*convBackFxnPtr)(double)); |
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253 | |
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254 | static RpUnits * define(RpUnits* from, |
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255 | RpUnits* to, |
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256 | void* (*convForwFxnPtr)(void*, void*), |
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257 | void* convForwData, |
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258 | void* (*convBackFxnPtr)(void*, void*), |
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259 | void* convBackData); |
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260 | |
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261 | // populate the dictionary with a set of units specified by group |
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262 | // if group equals......................then load................ |
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263 | // "all" load all available units |
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264 | // "energy" load units related to length |
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265 | // "length" load units related to length |
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266 | // "temp" load units related to temperature |
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267 | // "time" load units related to time |
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268 | // (no other groups have been created) |
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269 | |
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270 | static int addPresets (std::string group); |
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271 | |
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272 | // undefining a relation rule is probably not needed |
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273 | // int undefine(); // delete a relation |
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274 | |
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275 | // convert fxn will be taken care of in the RpUnitsConversion class |
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276 | // i think |
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277 | // int convert(const char* from, const char* to); |
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278 | |
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279 | // why are these functions friends... |
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280 | // probably need to find a better way to let RpUnits |
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281 | // use the RpDict and RpDictEntry fxns |
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282 | friend class RpDict<std::string,RpUnits*>; |
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283 | friend class RpDictEntry<std::string,RpUnits*>; |
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284 | |
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285 | // copy constructor |
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286 | RpUnits ( const RpUnits& myRpUnit ) |
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287 | { |
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288 | |
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289 | /* |
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290 | from = myRpUnit.from; |
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291 | to = myRpUnit.to; |
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292 | convertForw = myRpUnit.convertForw; |
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293 | convertBack = myRpUnit.convertBack; |
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294 | */ |
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295 | |
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296 | // copy constructor for unit |
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297 | unit* tmp = NULL; |
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298 | unit* newUnit = NULL; |
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299 | unit* p = myRpUnit.head; |
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300 | |
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301 | while (p != NULL) { |
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302 | newUnit = new unit(p->units, p->exponent,p->basis,NULL); |
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303 | |
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304 | newUnit->prev = tmp; |
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305 | if (tmp) { |
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306 | tmp->next = newUnit; |
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307 | } |
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308 | |
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309 | tmp = newUnit; |
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310 | p = p->next; |
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311 | } |
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312 | |
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313 | if (tmp) { |
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314 | while (tmp->prev != NULL) { |
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315 | tmp = tmp->prev; |
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316 | } |
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317 | } |
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318 | |
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319 | head = tmp; |
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320 | |
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321 | }; |
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322 | |
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323 | private: |
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324 | |
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325 | // i hope to replace these vars with a small class representing a |
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326 | // of a linked list of units. that way we can handle complex units. |
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327 | // this will also require that we move the getUnits, getExponent, |
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328 | // and getBasis, makeBasis functionality into the smaller class, |
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329 | // that represents each part of the units. we should keep getUnits, |
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330 | // getBasis, and makeBasis in this class, but modify them to go |
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331 | // through the linked list of units and combine the units back into |
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332 | // what the caller expects to see. |
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333 | // ie. cm2/Vms (mobility), will be split into the objects cm2, V, ms |
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334 | // when getUnits is called, the user should see cm2/Vms again. |
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335 | // for basis, possibly let the user choose a basis, and for makeBasis |
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336 | // move through the linked list, only converting the metric elements. |
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337 | // |
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338 | |
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339 | // used by the RpUnits when defining units elements |
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340 | unit* head; |
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341 | |
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342 | // linked list of units this RpUnit can convert to |
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343 | convEntry* convList; |
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344 | |
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345 | // used by the RpUnits when defining conversion elements |
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346 | conversion* conv; |
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347 | |
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348 | // dictionary to store the units. |
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349 | // dict pointer |
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350 | // static RpDict<std::string,RpUnits*> dict; |
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351 | static RpDict<std::string,RpUnits*>* dict; |
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352 | |
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353 | // create a units element |
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354 | // class takes in three pieces of info |
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355 | // 1) string describing the units |
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356 | // 2) double describing the exponent |
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357 | // 3) pointer to RpUnits object describing the basis |
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358 | // of the units (the fundamental unit) |
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359 | // |
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360 | RpUnits ( |
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361 | const std::string& units, |
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362 | double& exponent, |
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363 | // RpUnits* basis[] |
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364 | RpUnits* basis |
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365 | ) |
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366 | : head ( new unit( units, exponent, basis, NULL) ), |
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367 | convList (NULL), |
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368 | conv (NULL) |
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369 | {}; |
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370 | |
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371 | // create a conversion element |
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372 | |
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373 | RpUnits ( |
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374 | RpUnits* from, |
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375 | RpUnits* to, |
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376 | double (*convForwFxnPtr)(double), |
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377 | double (*convBackFxnPtr)(double), |
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378 | conversion* prev, |
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379 | conversion* next |
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380 | ) |
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381 | : head (NULL), |
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382 | convList (NULL), |
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383 | conv (new conversion |
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384 | (from,to,convForwFxnPtr,convBackFxnPtr,prev,next)) |
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385 | { |
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386 | connectConversion(from); |
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387 | connectConversion(to); |
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388 | }; |
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389 | |
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390 | RpUnits ( |
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391 | RpUnits* from, |
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392 | RpUnits* to, |
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393 | void* (*convForwFxnPtr)(void*, void*), |
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394 | void* convForwData, |
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395 | void* (*convBackFxnPtr)(void*, void*), |
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396 | void* convBackData, |
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397 | conversion* prev, |
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398 | conversion* next |
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399 | ) |
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400 | : head (NULL), |
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401 | convList (NULL), |
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402 | conv (new conversion ( from, to, |
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403 | convForwFxnPtr, convForwData, |
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404 | convBackFxnPtr, convBackData, |
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405 | prev, next |
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406 | ) |
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407 | ) |
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408 | { |
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409 | connectConversion(from); |
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410 | connectConversion(to); |
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411 | }; |
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412 | |
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413 | // default destructor |
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414 | // |
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415 | //~RpUnits (); |
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416 | ~RpUnits () |
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417 | { |
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418 | // clean up dynamic memory |
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419 | |
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420 | unit* p = head; |
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421 | while (p != NULL) { |
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422 | unit* tmp = p; |
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423 | p = p->next; |
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424 | delete tmp; |
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425 | } |
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426 | } |
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427 | |
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428 | void RpUnits::connectConversion(RpUnits* myRpUnit); |
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429 | |
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430 | void RpUnits::fillMetricMap(); |
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431 | |
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432 | // create the container keeping track of defined units |
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433 | // returns 0 on success (table created or already exists) |
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434 | // returns !0 on failure (table not created or cannot exist) |
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435 | int RpUnits::createUnitsTable(); |
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436 | |
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437 | // insert new RpUnits object into RpUnitsTable |
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438 | // returns 0 on success (object inserted or already exists) |
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439 | // returns !0 on failure (object cannot be inserted or dne) |
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440 | int RpUnits::insert(std::string key); |
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441 | |
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442 | // link two RpUnits objects that already exist in RpUnitsTable |
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443 | // returns 0 on success (linking within table was successful) |
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444 | // returns !0 on failure (linking was not successful) |
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445 | int RpUnits::link(RpUnits * unitA); |
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446 | |
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447 | |
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448 | static int pre_compare( std::string& units, RpUnits* basis = NULL); |
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449 | void addUnit( const std::string& units, |
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450 | double & exponent, |
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451 | RpUnits * basis |
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452 | ); |
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453 | |
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454 | static int addPresetAll(); |
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455 | static int addPresetEnergy(); |
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456 | static int addPresetLength(); |
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457 | static int addPresetTemp(); |
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458 | static int addPresetTime(); |
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459 | |
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460 | |
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461 | }; |
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462 | |
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463 | /*--------------------------------------------------------------------------*/ |
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464 | /*--------------------------------------------------------------------------*/ |
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465 | |
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466 | // #include "../src/RpUnits.cc" |
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467 | |
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468 | #endif |
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