From 6ac47429e8f6e281b741c9970b0bef9568db8291 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Th=C3=A9o=20LUDWIG?= <contact@theoludwig.fr>
Date: Wed, 25 Sep 2024 12:53:28 +0200
Subject: [PATCH] feat: use `double` instead of `float` for better precision

BREAKING CHANGE: Functions signatures changed
in the `mathematics` module.

BREAKING CHANGE: Renamed `MATHEMATICS_FLOAT_PRECISION` to `MATHEMATICS_DOUBLE_PRECISION`
---
 lib/mathematics.c | 12 ++++++------
 lib/mathematics.h | 12 ++++++------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/lib/mathematics.c b/lib/mathematics.c
index 957880a..158316f 100644
--- a/lib/mathematics.c
+++ b/lib/mathematics.c
@@ -1,7 +1,7 @@
 #include "mathematics.h"
 
-bool mathematics_equals(const float number1, const float number2) {
-  return (number1 - number2) < MATHEMATICS_FLOAT_PRECISION;
+bool mathematics_equals(const double number1, const double number2) {
+  return (number1 - number2) < MATHEMATICS_DOUBLE_PRECISION;
 }
 
 unsigned long long mathematics_absolute_value(const long long number) {
@@ -15,9 +15,9 @@ unsigned long long mathematics_pow(unsigned long long base, unsigned long long e
   return exponent == 0 ? 1 : base * mathematics_pow(base, exponent - 1);
 }
 
-float mathematics_root(float number, unsigned int nth_root) {
-  float result = number;
-  float previous_result = 0;
+double mathematics_root(double number, unsigned int nth_root) {
+  double result = number;
+  double previous_result = 0;
   while (!mathematics_equals(result, previous_result)) {
     result = (((nth_root - 1) * previous_result) + (number / mathematics_pow(result, nth_root - 1))) / nth_root;
     previous_result = result;
@@ -25,7 +25,7 @@ float mathematics_root(float number, unsigned int nth_root) {
   return result;
 }
 
-float mathematics_square_root(float number) {
+double mathematics_square_root(double number) {
   return mathematics_root(number, 2);
 }
 
diff --git a/lib/mathematics.h b/lib/mathematics.h
index 86ab87e..66b56f7 100644
--- a/lib/mathematics.h
+++ b/lib/mathematics.h
@@ -1,7 +1,7 @@
 #ifndef __LIBCPROJECT_MATHEMATICS__
 #define __LIBCPROJECT_MATHEMATICS__
 
-#define MATHEMATICS_FLOAT_PRECISION 0.00000001
+#define MATHEMATICS_DOUBLE_PRECISION 0.0000000001
 
 #include <errno.h>
 #include <stdbool.h>
@@ -18,7 +18,7 @@
  * @return false
  * @since v1.0.0
  */
-bool mathematics_equals(const float number1, const float number2);
+bool mathematics_equals(const double number1, const double number2);
 
 /**
  * @brief Get the absolute value of a number.
@@ -44,19 +44,19 @@ unsigned long long mathematics_pow(unsigned long long base, unsigned long long e
  *
  * @param number
  * @param nth_root
- * @return float
+ * @return double
  * @since v1.0.0
  */
-float mathematics_root(float number, unsigned int nth_root);
+double mathematics_root(double number, unsigned int nth_root);
 
 /**
  * @brief Calculates the square root of a number using Heron's method.
  *
  * @param number
- * @return float
+ * @return double
  * @since v1.0.0
  */
-float mathematics_square_root(float number);
+double mathematics_square_root(double number);
 
 /**
  * @brief Calculates the factorial of a number.