From ac0f5a1011276f5209b38e3ac182985cf5997f6a Mon Sep 17 00:00:00 2001
From: xoy <felix@erstfeld.net>
Date: Mon, 16 Oct 2023 19:06:54 +0200
Subject: [PATCH] [First Commit]

Primenumber generator
---
 .gitignore                    |  1 +
 cache/primenumbers/0          |  1 +
 cache/primenumbers/1          |  1 +
 cache/primenumbers/last_index |  1 +
 main.py                       |  6 +++++
 primenumbers.py               | 46 +++++++++++++++++++++++++++++++++++
 util.py                       | 13 ++++++++++
 7 files changed, 69 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 cache/primenumbers/0
 create mode 100644 cache/primenumbers/1
 create mode 100644 cache/primenumbers/last_index
 create mode 100644 main.py
 create mode 100644 primenumbers.py
 create mode 100644 util.py

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ba0430d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__/
\ No newline at end of file
diff --git a/cache/primenumbers/0 b/cache/primenumbers/0
new file mode 100644
index 0000000..56a6051
--- /dev/null
+++ b/cache/primenumbers/0
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git a/cache/primenumbers/1 b/cache/primenumbers/1
new file mode 100644
index 0000000..d8263ee
--- /dev/null
+++ b/cache/primenumbers/1
@@ -0,0 +1 @@
+2
\ No newline at end of file
diff --git a/cache/primenumbers/last_index b/cache/primenumbers/last_index
new file mode 100644
index 0000000..56a6051
--- /dev/null
+++ b/cache/primenumbers/last_index
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..aa91d51
--- /dev/null
+++ b/main.py
@@ -0,0 +1,6 @@
+from primenumbers import primenumbers as pn
+
+
+if __name__ == "__main__":
+    P = pn()
+    P.generate(10000)
\ No newline at end of file
diff --git a/primenumbers.py b/primenumbers.py
new file mode 100644
index 0000000..558e099
--- /dev/null
+++ b/primenumbers.py
@@ -0,0 +1,46 @@
+from util import read_file, write_file, append_file
+from sys import maxsize
+
+class primenumbers:
+    def __init__(self, cache: str = "./cache/primenumbers/") -> None:
+        self.p_last_index    : int
+        self.p_current_index : int
+        self.p_current_number: int
+
+        self.p_cache = cache
+
+        self.p_last_index = int(read_file(self.p_cache+"last_index")[0])
+        self.p_current_index = self.p_last_index + 1
+        self.p_current_number = int(read_file(self.p_cache+str(self.p_last_index))[0])
+        if self.p_current_number == maxsize:
+            print("Max int size reached!")
+            exit()
+        self.p_current_number += 1
+
+        print(f"Last index      : {self.p_last_index}")
+        print(f"Current index   : {self.p_current_index}")
+        print(f"Current number  : {self.p_current_number}")
+
+    def generate(self, iterations: int = -1):
+        print(f"Generating {iterations} primenumbers:")
+        iteration: int = 0
+        while(iterations == -1 or iteration < iterations):
+            is_primenumber = True
+            for i in range(1, self.p_current_index):
+                if self.check_modulo(self.p_current_number, int(read_file(self.p_cache+str(i))[0])):
+                    is_primenumber = False
+                    break
+            if is_primenumber:
+                print(f"\nPrimenumber found: {self.p_current_number}\n")
+                write_file(self.p_cache+str(self.p_current_index), str(self.p_current_number))
+                self.p_last_index = self.p_current_index
+                write_file(self.p_cache+"last_index", str(self.p_last_index))
+                self.p_current_index += 1
+            if self.p_current_number == maxsize:
+                print("Max int size reached!")
+                break
+            self.p_current_number += 1
+            iteration += 1
+
+    def check_modulo(self, a: int, b: int) -> bool:
+        return a % b == 0
\ No newline at end of file
diff --git a/util.py b/util.py
new file mode 100644
index 0000000..ac36626
--- /dev/null
+++ b/util.py
@@ -0,0 +1,13 @@
+def read_file(filepath: str) -> list[str]:
+    file = open(filepath, "r")
+    return file.readlines()
+
+def write_file(filepath: str, insert_string: str) -> bool:
+    file = open(filepath, "w")
+    file.write(insert_string)
+    file.close()
+
+def append_file(filepath: str, append_string: str) -> bool:
+    file = open(filepath, "a")
+    file.write(append_string)
+    file.close()