/xampp/php/PEAR/Math/IntegerOp.php

https://github.com/edmondscommerce/XAMPP-Magento-Demo-Site · PHP · 404 lines · 237 code · 17 blank · 150 comment · 37 complexity · adb31c2caa6c9971d671948c9f21b954 MD5 · raw file 

    

  1. <?php
    2. 

  2. //
    3. 

  3. // +----------------------------------------------------------------------+
    4. 

  4. // | PHP Version 4                                                        |
    5. 

  5. // +----------------------------------------------------------------------+
    6. 

  6. // | Copyright (c) 1997-2002 The PHP Group                                |
    7. 

  7. // +----------------------------------------------------------------------+
    8. 

  8. // | This source file is subject to version 2.0 of the PHP license,       |
    9. 

  9. // | that is bundled with this package in the file LICENSE, and is        |
    10. 

  10. // | available at through the world-wide-web at                           |
    11. 

  11. // | http://www.php.net/license/2_02.txt.                                 |
    12. 

  12. // | If you did not receive a copy of the PHP license and are unable to   |
    13. 

  13. // | obtain it through the world-wide-web, please send a note to          |
    14. 

  14. // | license@php.net so we can mail you a copy immediately.               |
    15. 

  15. // +----------------------------------------------------------------------+
    16. 

  16. // | Authors: Jesus M. Castagnetto <jmcastagnetto@php.net>                |
    17. 

  17. // +----------------------------------------------------------------------+
    18. 

  18. //
    19. 

  19. // $Id: IntegerOp.php,v 1.1 2003/01/02 01:55:05 jmcastagnetto Exp $
    20. 

  20. //
    21. 

  21. 

  22. include_once 'Math/Integer.php';
    23. 

  23. 

  24. /**
    25. 

  25.  * Class implementing operations on Math_Integer objects. If available it
    26. 

  26.  * will use the GMP or BCMATH libraries. Will default to the standard PHP
    27. 

  27.  * integer representation otherwise.
    28. 

  28.  * 
    29. 

  29.  * The operations are implemented as static methods of the class.
    30. 

  30.  *
    31. 

  31.  * @author  Jesus M. Castagnetto <jmcastagnetto@php.net>
    32. 

  32.  * @version 0.8
    33. 

  33.  * @access  public
    34. 

  34.  * @package Math_Integer
    35. 

  35.  */
    36. 

  36. class Math_IntegerOp {/*{{{*/
    37. 

  37. 

  38.     /**
    39. 

  39.      * Checks if the given parameter is a Math_Integer object
    40. 

  40.      *
    41. 

  41.      * @param object Math_Integer $int1
    42. 

  42.      * @return boolean TRUE if parameter is an instance of Math_Integer, FALSE otherwise
    43. 

  43.      * @access public
    44. 

  44.      */
    45. 

  45.     function isMath_Integer(&$int) {/*{{{*/
    46. 

  46.         if (function_exists('is_a')) {
    47. 

  47.             return is_a($int, 'Math_Integer');
    48. 

  48.         } else {
    49. 

  49.             return get_class($int) == 'math_integer' 
    50. 

  50.                     || is_subclass_of($int, 'math_integer');
    51. 

  51.         }
    52. 

  52.     }/*}}}*/
    53. 

  53. 

  54.     /**
    55. 

  55.      * Add two Math_Integer objects: $i1 + $i2
    56. 

  56.      *
    57. 

  57.      * @param object Math_Integer $int1
    58. 

  58.      * @param object Math_Integer $int2
    59. 

  59.      * @return object Math_Integer on success, PEAR_Error otherwise
    60. 

  60.      * @access public
    61. 

  61.      */
    62. 

  62.     function &add(&$int1, &$int2) {/*{{{*/
    63. 

  63.         if (PEAR::isError($err = Math_IntegerOp::_validInts($int1, $int2))) {
    64. 

  64.             return $err;
    65. 

  65.         }
    66. 

  66.         switch (MATH_INTLIB) {/*{{{*/
    67. 

  67.             case 'gmp' :
    68. 

  68.                 $tmp = gmp_strval(gmp_add($int1->getValue(), $int2->getValue()));
    69. 

  69.                 break;
    70. 

  70.             case 'bcmath' :
    71. 

  71.                 $tmp = bcadd($int1->getValue(), $int2->getValue());
    72. 

  72.                 break;
    73. 

  73.             case 'std' :
    74. 

  74.                 $tmp = $int1->getValue() + $int2->getValue(); 
    75. 

  75.                 break;
    76. 

  76.         }/*}}}*/
    77. 

  77.         return new Math_Integer($tmp);
    78. 

  78.     }/*}}}*/
    79. 

  79. 

  80.     /**
    81. 

  81.      * Substract two Math_Integer objects: $i1 - $i2
    82. 

  82.      *
    83. 

  83.      * @param object Math_Integer $int1
    84. 

  84.      * @param object Math_Integer $int2
    85. 

  85.      * @return object Math_Integer on success, PEAR_Error otherwise
    86. 

  86.      * @access public
    87. 

  87.      */
    88. 

  88.     function &sub(&$int1, &$int2) {/*{{{*/
    89. 

  89.         if (PEAR::isError($err = Math_IntegerOp::_validInts($int1, $int2))) {
    90. 

  90.             return $err;
    91. 

  91.         }
    92. 

  92.         switch (MATH_INTLIB) {/*{{{*/
    93. 

  93.             case 'gmp' :
    94. 

  94.                 $tmp = gmp_strval(gmp_sub($int1->getValue(), $int2->getValue()));
    95. 

  95.                 break;
    96. 

  96.             case 'bcmath' :
    97. 

  97.                 $tmp = bcsub($int1->getValue(), $int2->getValue());
    98. 

  98.                 break;
    99. 

  99.             case 'std' :
    100. 

  100.                 $tmp = $int1->getValue() - $int2->getValue(); 
    101. 

  101.                 break;
    102. 

  102.         }/*}}}*/
    103. 

  103.         return new Math_Integer($tmp);
    104. 

  104.     }/*}}}*/
    105. 

  105. 

  106.     /**
    107. 

  107.      * Multiply two Math_Integer objects: $i1 * $i2
    108. 

  108.      *
    109. 

  109.      * @param object Math_Integer $int1
    110. 

  110.      * @param object Math_Integer $int2
    111. 

  111.      * @return object Math_Integer on success, PEAR_Error otherwise
    112. 

  112.      * @access public
    113. 

  113.      */
    114. 

  114.     function &mul(&$int1, &$int2) {/*{{{*/
    115. 

  115.         if (PEAR::isError($err = Math_IntegerOp::_validInts($int1, $int2))) {
    116. 

  116.             return $err;
    117. 

  117.         }
    118. 

  118.         switch (MATH_INTLIB) {/*{{{*/
    119. 

  119.             case 'gmp' :
    120. 

  120.                 $tmp = gmp_strval(gmp_mul($int1->getValue(), $int2->getValue()));
    121. 

  121.                 break;
    122. 

  122.             case 'bcmath' :
    123. 

  123.                 $tmp = bcmul($int1->getValue(), $int2->getValue());
    124. 

  124.                 break;
    125. 

  125.             case 'std' :
    126. 

  126.                 $tmp = $int1->getValue() * $int2->getValue(); 
    127. 

  127.                 break;
    128. 

  128.         }/*}}}*/
    129. 

  129.         return new Math_Integer($tmp);
    130. 

  130.     }/*}}}*/
    131. 

  131. 

  132.     /**
    133. 

  133.      * Divide two Math_Integer objects: $i1 / $i2
    134. 

  134.      *
    135. 

  135.      * @param object Math_Integer $int1
    136. 

  136.      * @param object Math_Integer $int2
    137. 

  137.      * @return object Math_Integer on success, PEAR_Error otherwise
    138. 

  138.      * @access public
    139. 

  139.      */
    140. 

  140.     function &div(&$int1, &$int2) {/*{{{*/
    141. 

  141.         if (PEAR::isError($err = Math_IntegerOp::_validInts($int1, $int2))) {
    142. 

  142.             return $err;
    143. 

  143.         }
    144. 

  144.         switch (MATH_INTLIB) {/*{{{*/
    145. 

  145.             case 'gmp' :
    146. 

  146.                 $tmp = gmp_strval(gmp_div($int1->getValue(), $int2->getValue()));
    147. 

  147.                 break;
    148. 

  148.             case 'bcmath' :
    149. 

  149.                 $tmp = bcdiv($int1->getValue(), $int2->getValue());
    150. 

  150.                 break;
    151. 

  151.             case 'std' :
    152. 

  152.                 $tmp = intval($int1->getValue() / $int2->getValue()); 
    153. 

  153.                 break;
    154. 

  154.         }/*}}}*/
    155. 

  155.         return new Math_Integer($tmp);
    156. 

  156.     }/*}}}*/
    157. 

  157. 

  158.     /**
    159. 

  159.      * Calculate the modulus of $i1 and $i2: $i1 % $i2
    160. 

  160.      *
    161. 

  161.      * @param object Math_Integer $int1
    162. 

  162.      * @param object Math_Integer $int2
    163. 

  163.      * @return object Math_Integer on success, PEAR_Error otherwise
    164. 

  164.      * @access public
    165. 

  165.      */
    166. 

  166.     function &mod(&$int1, &$int2) {/*{{{*/
    167. 

  167.         if (PEAR::isError($err = Math_IntegerOp::_validInts($int1, $int2))) {
    168. 

  168.             return $err;
    169. 

  169.         }
    170. 

  170.         switch (MATH_INTLIB) {/*{{{*/
    171. 

  171.             case 'gmp' :
    172. 

  172.                 $tmp = gmp_strval(gmp_mod($int1->getValue(), $int2->getValue()));
    173. 

  173.                 break;
    174. 

  174.             case 'bcmath' :
    175. 

  175.                 $tmp = bcmod($int1->getValue(), $int2->getValue());
    176. 

  176.                 break;
    177. 

  177.             case 'std' :
    178. 

  178.                 $tmp = $int1->getValue() % $int2->getValue(); 
    179. 

  179.                 break;
    180. 

  180.         }/*}}}*/
    181. 

  181.         return new Math_Integer($tmp);
    182. 

  182.     }/*}}}*/
    183. 

  183. 

  184.     /**
    185. 

  185.      * Raise $i1 to the $i2 exponent: $i1^$i2
    186. 

  186.      *
    187. 

  187.      * @param object Math_Integer $int1
    188. 

  188.      * @param object Math_Integer $int2
    189. 

  189.      * @return object Math_Integer on success, PEAR_Error otherwise
    190. 

  190.      * @access public
    191. 

  191.      */
    192. 

  192.     function &pow(&$int1, &$int2) {/*{{{*/
    193. 

  193.         if (PEAR::isError($err = Math_IntegerOp::_validInts($int1, $int2))) {
    194. 

  194.             return $err;
    195. 

  195.         }
    196. 

  196.         switch (MATH_INTLIB) {/*{{{*/
    197. 

  197.             case 'gmp' :
    198. 

  198.                 $tmp = gmp_strval(gmp_pow($int1->getValue(), (int) $int2->toString()));
    199. 

  199.                 break;
    200. 

  200.             case 'bcmath' :
    201. 

  201.                 $tmp = bcpow($int1->getValue(), $int2->getValue());
    202. 

  202.                 break;
    203. 

  203.             case 'std' :
    204. 

  204.                 $tmp = pow($int1->getValue(), $int2->getValue()); 
    205. 

  205.                 break;
    206. 

  206.         }/*}}}*/
    207. 

  207.         return new Math_Integer($tmp);
    208. 

  208.     }/*}}}*/
    209. 

  209. 

  210.     /**
    211. 

  211.      * Compare two Math_Integer objects.
    212. 

  212.      * if $i1 > $i2, returns +1,
    213. 

  213.      * if $i1 == $i2, returns +0,
    214. 

  214.      * if $i1 < $i2, returns -1,
    215. 

  215.      *
    216. 

  216.      * @param object Math_Integer $int1
    217. 

  217.      * @param object Math_Integer $int2
    218. 

  218.      * @return mixed and integer on success, PEAR_Error otherwise
    219. 

  219.      * @access public
    220. 

  220.      * @see Math_IntegerOp::sign
    221. 

  221.      */
    222. 

  222.     function &compare(&$int1, &$int2) {/*{{{*/
    223. 

  223.         if (PEAR::isError($err = Math_IntegerOp::_validInts($int1, $int2))) {
    224. 

  224.             return $err;
    225. 

  225.         }
    226. 

  226.         switch (MATH_INTLIB) {/*{{{*/
    227. 

  227.             case 'gmp' :
    228. 

  228.                 $cmp = gmp_cmp($int1->getValue(), $int2->getValue());
    229. 

  229.                 break;
    230. 

  230.             case 'bcmath' :
    231. 

  231.                 $cmp = bccomp($int1->getValue(), $int2->getValue());
    232. 

  232.                 break;
    233. 

  233.             case 'std' :
    234. 

  234.                 $cmp = $int1->getValue() - $int2->getValue(); 
    235. 

  235.                 break;
    236. 

  236.         }/*}}}*/
    237. 

  237.         return Math_IntegerOp::sign(new Math_Integer($cmp));
    238. 

  238.     }/*}}}*/
    239. 

  239. 

  240.     /**
    241. 

  241.      * Returns the sign of a Math_Integer number
    242. 

  242.      * if $i1 > 0, returns +1,
    243. 

  243.      * if $i1 == 0, returns +0,
    244. 

  244.      * if $i1 < 0, returns -1,
    245. 

  245.      *
    246. 

  246.      * @param object Math_Integer $int1
    247. 

  247.      * @return mixed and integer on success, PEAR_Error otherwise
    248. 

  248.      * @access public
    249. 

  249.      */
    250. 

  250.     function &sign(&$int1) {/*{{{*/
    251. 

  251.         if (PEAR::isError($err = Math_IntegerOp::_validInt($int1))) {
    252. 

  252.             return $err;
    253. 

  253.         }
    254. 

  254.         switch (MATH_INTLIB) {/*{{{*/
    255. 

  255.             case 'gmp' :
    256. 

  256.                 return gmp_sign($int1->getValue());
    257. 

  257.                 break;
    258. 

  258.             case 'bcmath' :
    259. 

  259.             case 'std' :
    260. 

  260.                 $tmp = $int1->getValue();
    261. 

  261.                 if ($tmp > 0) {
    262. 

  262.                     return 1;
    263. 

  263.                 } elseif ($tmp < 0) {
    264. 

  264.                     return -1;
    265. 

  265.                 } else { // $tmp == 0
    266. 

  266.                     return 0;
    267. 

  267.                 }
    268. 

  268.                 break;
    269. 

  269.         }/*}}}*/
    270. 

  270.     }/*}}}*/
    271. 

  271. 

  272.     /**
    273. 

  273.      * Returns the negative of a Math_Integer number: -1 * $i1
    274. 

  274.      *
    275. 

  275.      * @param object Math_Integer $int1
    276. 

  276.      * @return object Math_Integer on success, PEAR_Error otherwise
    277. 

  277.      * @access public
    278. 

  278.      */
    279. 

  279.     function &neg(&$int1) {/*{{{*/
    280. 

  280.         if (PEAR::isError($err = Math_IntegerOp::_validInt($int1))) {
    281. 

  281.             return $err;
    282. 

  282.         }
    283. 

  283.         switch (MATH_INTLIB) {/*{{{*/
    284. 

  284.             case 'gmp' :
    285. 

  285.                 $tmp = gmp_strval(gmp_neg($int1->getValue()));
    286. 

  286.                 break;
    287. 

  287.             case 'bcmath' :
    288. 

  288.                 $tmp = bcmul(-1, $int1->getValue());
    289. 

  289.                 break;
    290. 

  290.             case 'std' :
    291. 

  291.                 $tmp = -1 * $int1->getValue();
    292. 

  292.                 break;
    293. 

  293.         }/*}}}*/
    294. 

  294.         return new Math_Integer($tmp);
    295. 

  295.     }/*}}}*/
    296. 

  296. 

  297.     /**
    298. 

  298.      * Returns the (integer) square root of a Math_Integer number
    299. 

  299.      *
    300. 

  300.      * @param object Math_Integer $int1
    301. 

  301.      * @return object Math_Integer on success, PEAR_Error otherwise
    302. 

  302.      * @access public
    303. 

  303.      */
    304. 

  304.     function &sqrt(&$int1) {/*{{{*/
    305. 

  305.         if (PEAR::isError($err = Math_IntegerOp::_validInt($int1))) {
    306. 

  306.             return $err;
    307. 

  307.         }
    308. 

  308.         switch (MATH_INTLIB) {/*{{{*/
    309. 

  309.             case 'gmp' :
    310. 

  310.                 $tmp = gmp_strval(gmp_sqrt($int1->getValue()));
    311. 

  311.                 break;
    312. 

  312.             case 'bcmath' :
    313. 

  313.                 $tmp = bcsqrt(-1, $int1->getValue());
    314. 

  314.                 break;
    315. 

  315.             case 'std' :
    316. 

  316.                 $tmp = intval(sqrt($int1->getValue()));
    317. 

  317.                 break;
    318. 

  318.         }/*}}}*/
    319. 

  319.         return new Math_Integer($tmp);
    320. 

  320.     }/*}}}*/
    321. 

  321. 

  322.     /**
    323. 

  323.      * Returns the absolute value of a Math_Integer number
    324. 

  324.      *
    325. 

  325.      * @param object Math_Integer $int1
    326. 

  326.      * @return object Math_Integer on success, PEAR_Error otherwise
    327. 

  327.      * @access public
    328. 

  328.      */
    329. 

  329.     function &abs(&$int1) {/*{{{*/
    330. 

  330.         if (PEAR::isError($err = Math_IntegerOp::_validInt($int1))) {
    331. 

  331.             return $err;
    332. 

  332.         }
    333. 

  333.         switch (MATH_INTLIB) {/*{{{*/
    334. 

  334.             case 'gmp' :
    335. 

  335.                 $tmp = gmp_strval(gmp_abs($int1->getValue()));
    336. 

  336.                 break;
    337. 

  337.             case 'bcmath' :
    338. 

  338.                 if ($int1->getValue() < 0) {
    339. 

  339.                     $tmp = bcmul(-1, $int1->getValue());
    340. 

  340.                 } else {
    341. 

  341.                     $tmp = $int1->getValue();
    342. 

  342.                 }
    343. 

  343.                 break;
    344. 

  344.             case 'std' :
    345. 

  345.                 $tmp = abs($int1->getValue());
    346. 

  346.                 break;
    347. 

  347.         }/*}}}*/
    348. 

  348.         return new Math_Integer($tmp);
    349. 

  349.     }/*}}}*/
    350. 

  350. 

  351.     /**
    352. 

  352.      * Checks that the 2 passed objects are valid Math_Integer numbers.
    353. 

  353.      * The objects must be instances of Math_Integer and have been properly
    354. 

  354.      * initialized.
    355. 

  355.      *
    356. 

  356.      * @param object Math_Integer $int1
    357. 

  357.      * @param object Math_Integer $int2
    358. 

  358.      * @return mixed TRUE if both are Math_Integer objects, PEAR_Error otherwise
    359. 

  359.      * @access private
    360. 

  360.      */
    361. 

  361.     function _validInts(&$int1, &$int2) {/*{{{*/
    362. 

  362.         $err1 = Math_IntegerOp::_validInt($int1);
    363. 

  363.         $err2 = Math_IntegerOp::_validInt($int2);
    364. 

  364.         $error = '';
    365. 

  365.         if (PEAR::isError($err1)) {
    366. 

  366.             $error .= 'First parameter: '.$err1->getMessage();
    367. 

  367.         }
    368. 

  368.         if (PEAR::isError($err2)) {
    369. 

  369.             $error .= ' Second parameter: '.$err2->getMessage();
    370. 

  370.         }
    371. 

  371.         if (!empty($error)) {
    372. 

  372.             return PEAR::raiseError($error);
    373. 

  373.         } else {
    374. 

  374.             return true;
    375. 

  375.         }
    376. 

  376.     }/*}}}*/
    377. 

  377. 

  378.     /**
    379. 

  379.      * Checks that the passed object is a valid Math_Integer number.
    380. 

  380.      * The object must be an instance of Math_Integer and have been properly
    381. 

  381.      * initialized.
    382. 

  382.      *
    383. 

  383.      * @param object Math_Integer $int1
    384. 

  384.      * @return mixed TRUE if is a Math_Integer object, PEAR_Error otherwise
    385. 

  385.      * @access private
    386. 

  386.      */
    387. 

  387.     function _validInt(&$int1) {/*{{{*/
    388. 

  388.         $error = '';
    389. 

  389.         if (!Math_IntegerOp::isMath_Integer($int1)) {
    390. 

  390.             $error = 'Is not a Math_Integer object.';
    391. 

  391.         } elseif (!$int1->initialized()) {
    392. 

  392.             $error = 'Math_Integer object is uninitalized.';
    393. 

  393.         }
    394. 

  394.         if (!empty($error)) {
    395. 

  395.             return PEAR::raiseError($error);
    396. 

  396.         } else {
    397. 

  397.             return true;
    398. 

  398.         }
    399. 

  399.     }/*}}}*/
    400. 

  400. }/*}}} end of Math_IntegerOp */
    401. 

  401. 

  402. // vim: ts=4:sw=4:et:
    403. 

  403. // vim6: fdl=1:
    404. 

  404. ?>
    405.