Add random file fuzzing functions

hexlib/rand.py

@@ -0,0 +1,20 @@
+import random
+
+
+def fuzz(buf: bytes, n: int, width: int):
+    fuzzed = bytearray(buf)
+    for _ in range(n):
+        i = random.randint(0, len(buf))
+        for off in range(width):
+            if i + off < len(buf):
+                fuzzed[i + off] = fuzzed[i + off] + 1
+    return fuzzed
+
+
+def fuzz_file(file_in: str, out_files: list, n: int, width: int):
+    with open(file_in, "rb") as f:
+        buf = f.read()
+        for out_path in out_files:
+            with open(out_path, "wb") as out:
+                out.write(fuzz(buf, n, width))
+

setup.py

@@ -2,7 +2,7 @@ from setuptools import setup
 
 setup(
     name="hexlib",
-    version="1.6",
+    version="1.7",
     description="Misc utility methods",
     author="simon987",
     author_email="me@simon987.net",