1 files changed, 31 insertions, 0 deletions

diff --git a/pyecsca/edit.py b/pyecsca/edit.py
new file mode 100644
index 0000000..7fe364d
--- /dev/null
+++ b/pyecsca/edit.py
@@ -0,0 +1,31 @@
+from copy import copy
+from typing import Union, Tuple, Any
+from public import public
+import numpy as np
+
+from .trace import Trace
+
+
+@public
+def trim(trace: Trace, start: int = None, end: int = None) -> Trace:
+    if start is None:
+        start = 0
+    if end is None:
+        end = len(trace.samples)
+    if start > end:
+        raise ValueError("Invalid trim arguments.")
+    return Trace(copy(trace.title), copy(trace.data), trace.samples[start:end].copy())
+
+
+@public
+def reverse(trace: Trace) -> Trace:
+    return Trace(copy(trace.title), copy(trace.data), np.flipud(trace.samples))
+
+
+@public
+def pad(trace: Trace, lengths: Union[Tuple[int, int], int], values: Union[Tuple[Any, Any], Any] = (0, 0)) -> Trace:
+    if not isinstance(lengths, tuple):
+        lengths = (lengths, lengths)
+    if not isinstance(values, tuple):
+        values = (values, values)
+    return Trace(copy(trace.title), copy(trace.data), np.pad(trace.samples, lengths, "constant", constant_values=values))