Total Complexity | 53 |
Total Lines | 354 |
Duplicated Lines | 0 % |
Changes | 0 |
Complex classes like MathAbstract often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use MathAbstract, and based on these observations, apply Extract Interface, too.
1 | <?php |
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15 | abstract class MathAbstract |
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16 | { |
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17 | /** |
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18 | * Default precision |
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19 | */ |
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20 | const PRECISION = 9; |
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21 | |||
22 | /** |
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23 | * base <= 64 charlist |
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24 | */ |
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25 | const BASECHAR_64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; |
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26 | |||
27 | /** |
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28 | * base <= 62 char list |
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29 | */ |
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30 | const BASECHAR_62 = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; |
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31 | |||
32 | /** |
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33 | * base <= 36 charlist |
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34 | */ |
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35 | const BASECHAR_36 = '0123456789abcdefghijklmnopqrstuvwxyz'; |
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36 | |||
37 | /** |
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38 | * base char cache for all supported bases (bellow 64) |
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39 | * |
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40 | * @var string[] |
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41 | */ |
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42 | protected static $baseChars = [ |
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43 | 36 => self::BASECHAR_36, |
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44 | 62 => self::BASECHAR_62, |
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45 | 64 => self::BASECHAR_64, |
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46 | ]; |
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47 | |||
48 | /** |
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49 | * if set, will be used as default for all consecutive instances |
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50 | * |
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51 | * @var int |
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52 | */ |
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53 | protected static $globalPrecision; |
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54 | |||
55 | /** |
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56 | * Used in static context, aligned with $globalPrecision, default to self::PRECISION |
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57 | * |
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58 | * @var int |
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59 | */ |
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60 | protected static $staticPrecision = self::PRECISION; |
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61 | |||
62 | /** |
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63 | * @var bool |
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64 | */ |
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65 | protected static $gmpSupport; |
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66 | |||
67 | /** |
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68 | * @var string |
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69 | */ |
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70 | protected $number; |
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71 | |||
72 | /** |
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73 | * Instance precision, initialized with globalPrecision, default to self::PRECISION |
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74 | * |
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75 | * @var int |
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76 | */ |
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77 | protected $precision = self::PRECISION; |
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78 | |||
79 | /** |
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80 | * Math constructor. |
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81 | * |
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82 | * @param string|static $number |
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83 | * |
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84 | * @throws \InvalidArgumentException |
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85 | */ |
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86 | public function __construct($number) |
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87 | { |
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88 | if (isset(static::$globalPrecision)) { |
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89 | $this->precision = static::$globalPrecision; |
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90 | } |
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91 | |||
92 | $this->number = static::validateInputNumber($number); |
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93 | } |
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94 | |||
95 | /** |
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96 | * @return string |
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97 | */ |
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98 | public function __toString() |
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99 | { |
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100 | return static::normalizeNumber($this->number); |
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101 | } |
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102 | |||
103 | /** |
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104 | * @return string |
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105 | */ |
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106 | public function getNumber() |
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107 | { |
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108 | return $this->number; |
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109 | } |
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110 | |||
111 | /** |
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112 | * @param string $number |
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113 | * |
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114 | * @throws \InvalidArgumentException |
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115 | * |
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116 | * @return static |
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117 | */ |
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118 | public static function number($number) |
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121 | } |
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122 | |||
123 | /** |
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124 | * @param int $precision |
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125 | */ |
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126 | public static function setGlobalPrecision($precision) |
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127 | { |
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128 | // even INT_32 should be enough precision |
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129 | static::$globalPrecision = max(0, (int) $precision); |
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130 | static::$staticPrecision = static::$globalPrecision; |
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131 | } |
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132 | |||
133 | /** |
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134 | * @param int $precision |
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135 | * |
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136 | * @return $this |
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137 | */ |
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138 | public function setPrecision($precision) |
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139 | { |
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140 | // even INT_32 should be enough precision |
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141 | $this->precision = max(0, (int) $precision); |
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142 | |||
143 | return $this; |
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144 | } |
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145 | |||
146 | /** |
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147 | * @param bool $disable |
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148 | * |
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149 | * @return bool |
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150 | */ |
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151 | public static function gmpSupport($disable = false) |
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152 | { |
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153 | if ($disable) { |
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154 | return static::$gmpSupport = false; |
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155 | } |
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156 | |||
157 | return static::$gmpSupport = function_exists('gmp_init'); |
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158 | } |
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159 | |||
160 | /** |
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161 | * convert any based value bellow or equals to 64 to its decimal value |
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162 | * |
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163 | * @param string $number |
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164 | * @param int $base |
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165 | * |
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166 | * @throws \InvalidArgumentException |
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167 | * |
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168 | * @return static |
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169 | */ |
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170 | public static function fromBase($number, $base) |
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171 | { |
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172 | // cleanup |
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173 | $number = trim($number); |
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174 | $baseChar = static::getBaseChar($base); |
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175 | // Convert string to lower case since base36 or less is case insensitive |
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176 | if ($base < 37) { |
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177 | $number = strtolower($number); |
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178 | } |
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179 | |||
180 | // clean up the input string if it uses particular input formats |
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181 | switch ($base) { |
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182 | case 16: |
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183 | // remove 0x from start of string |
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184 | if (substr($number, 0, 2) === '0x') { |
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185 | $number = substr($number, 2); |
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186 | } |
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187 | break; |
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188 | case 8: |
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189 | // remove the 0 from the start if it exists - not really required |
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190 | if ($number[0] === 0) { |
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191 | $number = substr($number, 1); |
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192 | } |
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193 | break; |
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194 | case 2: |
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195 | // remove an 0b from the start if it exists |
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196 | if (substr($number, 0, 2) === '0b') { |
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197 | $number = substr($number, 2); |
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198 | } |
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199 | break; |
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200 | case 64: |
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201 | // remove padding chars: = |
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202 | $number = rtrim($number, '='); |
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203 | break; |
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204 | } |
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205 | |||
206 | // only support positive integers |
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207 | $number = ltrim($number, '-'); |
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208 | if ($number === '' || strpos($number, '.') !== false) { |
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209 | throw new \InvalidArgumentException('Argument number is not an integer'); |
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210 | } |
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211 | |||
212 | if (trim($number, $baseChar[0]) === '') { |
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213 | return new static('0'); |
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214 | } |
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215 | |||
216 | if (static::$gmpSupport && $base <= 62) { |
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217 | return new static(static::baseConvert($number, $base, 10)); |
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218 | } |
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219 | |||
220 | // By now we know we have a correct base and number |
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221 | $result = ''; |
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222 | $numberLen = strlen($number); |
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223 | // Now loop through each digit in the number |
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224 | for ($i = $numberLen - 1; $i >= 0; --$i) { |
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225 | $char = $number[$i]; // extract the last char from the number |
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226 | $ord = strpos($baseChar, $char); // get the decimal value |
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227 | if ($ord === false || $ord > $base) { |
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228 | throw new \InvalidArgumentException('Argument number is invalid'); |
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229 | } |
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230 | |||
231 | // Now convert the value+position to decimal |
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232 | $result = bcadd($result, bcmul($ord, bcpow($base, ($numberLen - $i - 1)))); |
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233 | } |
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234 | |||
235 | return new static($result ? $result : '0'); |
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236 | } |
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237 | |||
238 | /** |
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239 | * @return bool |
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240 | */ |
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241 | public function isPositive() |
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242 | { |
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243 | return $this->number[0] !== '-'; |
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244 | } |
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245 | |||
246 | /** |
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247 | * @return bool |
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248 | */ |
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249 | public function hasDecimals() |
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252 | } |
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253 | |||
254 | /** |
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255 | * @return $this |
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256 | */ |
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257 | public function normalize() |
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258 | { |
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259 | $this->number = static::normalizeNumber($this->number); |
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260 | |||
261 | return $this; |
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262 | } |
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263 | |||
264 | /** |
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265 | * There is no way around it, if you want to trust bcmath |
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266 | * you need to feed it with VALID numbers |
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267 | * Things like '1.1.1' or '12E16'are all 0 in bcmath world |
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268 | * |
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269 | * @param mixed $number |
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270 | * |
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271 | * @return bool |
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272 | */ |
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273 | public static function isNumber($number) |
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274 | { |
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275 | return (bool) preg_match('`^([+-]{1})?([0-9]+(\.[0-9]+)?|\.[0-9]+)$`', $number); |
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276 | } |
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277 | |||
278 | /** |
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279 | * removes preceding / trailing 0, + and ws |
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280 | * |
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281 | * @param string $number |
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282 | * @param string|null $default |
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283 | * |
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284 | * @return string|null |
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285 | */ |
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286 | public static function normalizeNumber($number, $default = null) |
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287 | { |
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288 | if (!static::isNumber($number)) { |
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289 | return $default; |
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290 | } |
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291 | |||
292 | $sign = $number[0] === '-' ? '-' : ''; |
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293 | $number = ltrim((string) $number, '0+-'); |
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294 | |||
295 | if (strpos($number, '.') !== false) { |
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296 | // also clear trailing 0 |
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297 | list($number, $dec) = explode('.', $number); |
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298 | $dec = rtrim($dec, '0.'); |
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299 | $number = ($number ? $number : '0') . ($dec ? '.' . $dec : ''); |
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300 | } |
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301 | |||
302 | return $number ? $sign . $number : '0'; |
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303 | } |
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304 | |||
305 | /** |
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306 | * @param int $base |
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307 | * @param int $max |
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308 | * |
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309 | * @throws \InvalidArgumentException |
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310 | * |
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311 | * @return string |
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312 | */ |
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313 | public static function getBaseChar($base, $max = 64) |
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314 | { |
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315 | $base = (int) $base; |
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316 | if ($base < 2 || $base > $max || $base > 64) { |
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317 | throw new \InvalidArgumentException('Argument base is not valid, base 2 to 64 are supported'); |
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318 | } |
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319 | |||
320 | if (!isset(static::$baseChars[$base])) { |
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321 | if ($base > 62) { |
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322 | static::$baseChars[$base] = ($base == 64) ? static::BASECHAR_64 : substr(static::BASECHAR_64, 0, $base); |
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323 | } elseif ($base > 36) { |
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324 | static::$baseChars[$base] = ($base == 62) ? static::BASECHAR_62 : substr(static::BASECHAR_62, 0, $base); |
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325 | } else { |
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326 | static::$baseChars[$base] = ($base == 36) ? static::BASECHAR_36 : substr(static::BASECHAR_36, 0, $base); |
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327 | } |
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328 | } |
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329 | |||
330 | return static::$baseChars[$base]; |
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331 | } |
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332 | |||
333 | /** |
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334 | * @param string|static $number |
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335 | * |
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336 | * @throws \InvalidArgumentException |
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337 | * |
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338 | * @return string |
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339 | */ |
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340 | protected static function validateInputNumber($number) |
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352 | } |
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353 | |||
354 | /** |
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355 | * @param int|string $integer |
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356 | * |
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357 | * @throws \InvalidArgumentException |
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358 | * |
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359 | * @return string |
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360 | */ |
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361 | protected static function validatePositiveInteger($integer) |
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362 | { |
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369 | } |
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370 | } |
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371 |