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