commit 76fe7fb668d8350ec9df586c764ce54a224efdee
Author: Dominik Krenn <dominik.krenn@1tool.com>
Date:   Wed Nov 5 07:52:44 2025 +0100

    init commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f7275bb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+venv/
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..e69de29
diff --git a/mathstream/__init__.py b/mathstream/__init__.py
new file mode 100644
index 0000000..339ac18
--- /dev/null
+++ b/mathstream/__init__.py
@@ -0,0 +1,2 @@
+from .engine import clear_logs, add, sub, mul, div
+from .number import StreamNumber
diff --git a/mathstream/engine.py b/mathstream/engine.py
new file mode 100644
index 0000000..e4da028
--- /dev/null
+++ b/mathstream/engine.py
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+from pathlib import Path
+from .number import StreamNumber, LOG_DIR
+
+def clear_logs():
+    if LOG_DIR.exists():
+        for p in LOG_DIR.glob("*"):
+            p.unlink()
+    LOG_DIR.mkdir(parents=True, exist_ok=True)
+
+def add(num_a: StreamNumber, num_b: StreamNumber) -> StreamNumber:
+    """Digit-by-digit streamed addition."""
+    out_file = LOG_DIR / f"{num_a.hash}_add_{num_b.hash}.bin"
+
+    carry = 0
+    a_buf = list(num_a.stream(1))
+    b_buf = list(num_b.stream(1))
+
+    # align lengths
+    max_len = max(len(a_buf), len(b_buf))
+    a_buf = ["0"] * (max_len - len(a_buf)) + a_buf
+    b_buf = ["0"] * (max_len - len(b_buf)) + b_buf
+
+    with open(out_file, "wb") as out:
+        for i in range(max_len - 1, -1, -1):
+            s = int(a_buf[i]) + int(b_buf[i]) + carry
+            carry, digit = divmod(s, 10)
+            out.write(str(digit).encode())
+        if carry:
+            out.write(str(carry).encode())
+    return StreamNumber(out_file)
+
+def sub(num_a, num_b):
+    """Basic streamed subtraction (assumes a >= b)."""
+    # similar pattern with borrow propagation...
+    pass
+
+def mul(num_a, num_b):
+    """Chunked multiplication using repeated addition."""
+    # create temporary stage files for partial sums
+    pass
+
+def div(num_a, num_b):
+    """Long division, streamed stage by stage."""
+    # create multiple intermediate files: div_stage_1, div_stage_2, etc.
+    pass
diff --git a/mathstream/number.py b/mathstream/number.py
new file mode 100644
index 0000000..a3cc79e
--- /dev/null
+++ b/mathstream/number.py
@@ -0,0 +1,27 @@
+import hashlib
+from pathlib import Path
+
+LOG_DIR = Path("./instance/log")
+
+class StreamNumber:
+    def __init__(self, file_path):
+        self.path = Path(file_path)
+        if not self.path.exists():
+            raise FileNotFoundError(self.path)
+        self.hash = hashlib.sha1(str(self.path).encode()).hexdigest()[:10]
+
+    def __repr__(self):
+        return f"<StreamNumber {self.path.name}>"
+
+    def stream(self, chunk_size=4096):
+        """Yield chunks of digits as strings."""
+        with open(self.path, "r", encoding="utf-8") as f:
+            while chunk := f.read(chunk_size):
+                yield chunk.strip().replace(",", ".")
+
+    def write_stage(self, stage, data: str):
+        """Write intermediate stage result."""
+        stage_file = LOG_DIR / f"{self.hash}_stage_{stage}.bin"
+        with open(stage_file, "wb") as f:
+            f.write(data.encode())
+        return stage_file
diff --git a/mathstream/utils.py b/mathstream/utils.py
new file mode 100644
index 0000000..e69de29