1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
|
<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Locale
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/
/**
* Utility class for proxying math function to bcmath functions, if present,
* otherwise to PHP builtin math operators, with limited detection of overflow conditions.
* Sampling of PHP environments and platforms suggests that at least 80% to 90% support bcmath.
* Thus, this file should be as light as possible.
*
* @category Zend
* @package Zend_Locale
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Locale_Math
{
// support unit testing without using bcmath functions
public static $_bcmathDisabled = false;
public static $add = array('Zend_Locale_Math', 'Add');
public static $sub = array('Zend_Locale_Math', 'Sub');
public static $pow = array('Zend_Locale_Math', 'Pow');
public static $mul = array('Zend_Locale_Math', 'Mul');
public static $div = array('Zend_Locale_Math', 'Div');
public static $comp = array('Zend_Locale_Math', 'Comp');
public static $sqrt = array('Zend_Locale_Math', 'Sqrt');
public static $mod = array('Zend_Locale_Math', 'Mod');
public static $scale = 'bcscale';
public static function isBcmathDisabled()
{
return self::$_bcmathDisabled;
}
/**
* Surprisingly, the results of this implementation of round()
* prove better than the native PHP round(). For example, try:
* round(639.795, 2);
* round(267.835, 2);
* round(0.302515, 5);
* round(0.36665, 4);
* then try:
* Zend_Locale_Math::round('639.795', 2);
*/
public static function round($op1, $precision = 0)
{
if (self::$_bcmathDisabled) {
$op1 = round($op1, $precision);
if (strpos((string) $op1, 'E') === false) {
return self::normalize(round($op1, $precision));
}
}
if (strpos($op1, 'E') !== false) {
$op1 = self::floatalize($op1);
}
$op1 = trim(self::normalize($op1));
$length = strlen($op1);
if (($decPos = strpos($op1, '.')) === false) {
$op1 .= '.0';
$decPos = $length;
$length += 2;
}
if ($precision < 0 && abs($precision) > $decPos) {
return '0';
}
$digitsBeforeDot = $length - ($decPos + 1);
if ($precision >= ($length - ($decPos + 1))) {
return $op1;
}
if ($precision === 0) {
$triggerPos = 1;
$roundPos = -1;
} elseif ($precision > 0) {
$triggerPos = $precision + 1;
$roundPos = $precision;
} else {
$triggerPos = $precision;
$roundPos = $precision -1;
}
$triggerDigit = $op1[$triggerPos + $decPos];
if ($precision < 0) {
// zero fill digits to the left of the decimal place
$op1 = substr($op1, 0, $decPos + $precision) . str_pad('', abs($precision), '0');
}
if ($triggerDigit >= '5') {
if ($roundPos + $decPos == -1) {
return str_pad('1', $decPos + 1, '0');
}
$roundUp = str_pad('', $length, '0');
$roundUp[$decPos] = '.';
$roundUp[$roundPos + $decPos] = '1';
if ($op1 > 0) {
if (self::$_bcmathDisabled) {
return Zend_Locale_Math_PhpMath::Add($op1, $roundUp, $precision);
}
return self::Add($op1, $roundUp, $precision);
} else {
if (self::$_bcmathDisabled) {
return Zend_Locale_Math_PhpMath::Sub($op1, $roundUp, $precision);
}
return self::Sub($op1, $roundUp, $precision);
}
} elseif ($precision >= 0) {
return substr($op1, 0, $decPos + ($precision ? $precision + 1: 0));
}
return (string) $op1;
}
/**
* Convert a scientific notation to float
* Additionally fixed a problem with PHP <= 5.2.x with big integers
*
* @param string $value
*/
public static function floatalize($value)
{
$value = strtoupper($value);
if (strpos($value, 'E') === false) {
return $value;
}
$number = substr($value, 0, strpos($value, 'E'));
if (strpos($number, '.') !== false) {
$post = strlen(substr($number, strpos($number, '.') + 1));
$mantis = substr($value, strpos($value, 'E') + 1);
if ($mantis < 0) {
$post += abs((int) $mantis);
}
$value = number_format($value, $post, '.', '');
} else {
$value = number_format($value, 0, '.', '');
}
return $value;
}
/**
* Normalizes an input to standard english notation
* Fixes a problem of BCMath with setLocale which is PHP related
*
* @param integer $value Value to normalize
* @return string Normalized string without BCMath problems
*/
public static function normalize($value)
{
$convert = localeconv();
$value = str_replace($convert['thousands_sep'], "",(string) $value);
$value = str_replace($convert['positive_sign'], "", $value);
$value = str_replace($convert['decimal_point'], ".",$value);
if (!empty($convert['negative_sign']) and (strpos($value, $convert['negative_sign']))) {
$value = str_replace($convert['negative_sign'], "", $value);
$value = "-" . $value;
}
return $value;
}
/**
* Localizes an input from standard english notation
* Fixes a problem of BCMath with setLocale which is PHP related
*
* @param integer $value Value to normalize
* @return string Normalized string without BCMath problems
*/
public static function localize($value)
{
$convert = localeconv();
$value = str_replace(".", $convert['decimal_point'], (string) $value);
if (!empty($convert['negative_sign']) and (strpos($value, "-"))) {
$value = str_replace("-", $convert['negative_sign'], $value);
}
return $value;
}
/**
* Changes exponential numbers to plain string numbers
* Fixes a problem of BCMath with numbers containing exponents
*
* @param integer $value Value to erase the exponent
* @param integer $scale (Optional) Scale to use
* @return string
*/
public static function exponent($value, $scale = null)
{
if (!extension_loaded('bcmath')) {
return $value;
}
$split = explode('e', $value);
if (count($split) == 1) {
$split = explode('E', $value);
}
if (count($split) > 1) {
$value = bcmul($split[0], bcpow(10, $split[1], $scale), $scale);
}
return $value;
}
/**
* BCAdd - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param string $op2
* @param integer $scale
* @return string
*/
public static function Add($op1, $op2, $scale = null)
{
$op1 = self::exponent($op1, $scale);
$op2 = self::exponent($op2, $scale);
return bcadd($op1, $op2, $scale);
}
/**
* BCSub - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param string $op2
* @param integer $scale
* @return string
*/
public static function Sub($op1, $op2, $scale = null)
{
$op1 = self::exponent($op1, $scale);
$op2 = self::exponent($op2, $scale);
return bcsub($op1, $op2, $scale);
}
/**
* BCPow - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param string $op2
* @param integer $scale
* @return string
*/
public static function Pow($op1, $op2, $scale = null)
{
$op1 = self::exponent($op1, $scale);
$op2 = self::exponent($op2, $scale);
return bcpow($op1, $op2, $scale);
}
/**
* BCMul - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param string $op2
* @param integer $scale
* @return string
*/
public static function Mul($op1, $op2, $scale = null)
{
$op1 = self::exponent($op1, $scale);
$op2 = self::exponent($op2, $scale);
return bcmul($op1, $op2, $scale);
}
/**
* BCDiv - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param string $op2
* @param integer $scale
* @return string
*/
public static function Div($op1, $op2, $scale = null)
{
$op1 = self::exponent($op1, $scale);
$op2 = self::exponent($op2, $scale);
return bcdiv($op1, $op2, $scale);
}
/**
* BCSqrt - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param integer $scale
* @return string
*/
public static function Sqrt($op1, $scale = null)
{
$op1 = self::exponent($op1, $scale);
return bcsqrt($op1, $scale);
}
/**
* BCMod - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param string $op2
* @return string
*/
public static function Mod($op1, $op2)
{
$op1 = self::exponent($op1);
$op2 = self::exponent($op2);
return bcmod($op1, $op2);
}
/**
* BCComp - fixes a problem of BCMath and exponential numbers
*
* @param string $op1
* @param string $op2
* @param integer $scale
* @return string
*/
public static function Comp($op1, $op2, $scale = null)
{
$op1 = self::exponent($op1, $scale);
$op2 = self::exponent($op2, $scale);
return bccomp($op1, $op2, $scale);
}
}
if (!extension_loaded('bcmath')
|| (defined('TESTS_ZEND_LOCALE_BCMATH_ENABLED') && !TESTS_ZEND_LOCALE_BCMATH_ENABLED)
) {
Zend_Locale_Math_PhpMath::disable();
}
|
