neels has uploaded this change for review.

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utils: add unrpad()

In pysim.esim.saip, some encoding steps use rpad(); here is the
counterpart, that will allow to also decode values back.

Related: SYS#6768
Change-Id: I48c23390926f8c9412624edb4481e7f4cd3f4b46
---
M src/osmocom/utils.py
1 file changed, 14 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/python/pyosmocom refs/changes/00/39600/1

diff --git a/src/osmocom/utils.py b/src/osmocom/utils.py
index 5947453..e7053c1 100644
--- a/src/osmocom/utils.py
+++ b/src/osmocom/utils.py
@@ -121,6 +121,20 @@
     return s + c * (l - len(s))
 
 
+def unrpad(s: str, c='f') -> str:
+    """unpad string on the right side -- reverse of rpad().
+    Args:
+            s : string to pad
+            c : padding character
+    Returns:
+            String 's' with all rightmost c stripped.
+    """
+    end = len(s)
+    while end > 0 and s[end - 1] == c:
+        end -= 1
+    return s[:end]
+
+
 def lpad(s: str, l: int, c='f') -> str:
     """pad string on the left side.
     Args:

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