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61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 7 |
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+----------------------------------------------------------------------+
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| Copyright (c) 2006-2016 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Keyur Govande <kgovande@gmail.com> |
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+----------------------------------------------------------------------+
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*/
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#ifndef MYSQL_FLOAT_TO_DOUBLE_H
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#define MYSQL_FLOAT_TO_DOUBLE_H
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#include "main/php.h"
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#include <float.h>
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#include "main/snprintf.h"
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#define MAX_CHAR_BUF_LEN 255
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#ifndef FLT_DIG
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# define FLT_DIG 6
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#endif
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/*
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* Convert from a 4-byte float to a 8-byte decimal by first converting
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* the float to a string, and then the string to a double.
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* The decimals argument specifies the precision of the output. If decimals
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* is less than zero, then a gcvt(3) like logic is used with the significant
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* digits set to FLT_DIG i.e. 6.
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*/
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static inline double mysql_float_to_double(float fp4, int decimals) {
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char num_buf[MAX_CHAR_BUF_LEN]; /* Over allocated */
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if (decimals < 0) {
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php_gcvt(fp4, FLT_DIG, '.', 'e', num_buf);
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} else {
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php_sprintf(num_buf, "%.*f", decimals, fp4);
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}
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return zend_strtod(num_buf, NULL);
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: noet sw=4 ts=4 fdm=marker
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* vim<600: noet sw=4 ts=4
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*/
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#endif /* MYSQL_FLOAT_TO_DOUBLE_H */
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