Replaced adler32.c with adler32.pypython-adler32

The task is rather easier in Python and this way we have a ready to run
script instead of a tool that needs compilation first. Execution speed
is about the same.

Goodbye little C program, we had a good time!

1 files changed, 20 insertions, 0 deletions

diff --git a/client/adler32.py b/client/adler32.py
new file mode 100755
index 0000000..65260e0
--- /dev/null
+++ b/client/adler32.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+import sys
+import zlib
+
+def adler32(file):
+    with open(file, 'rb') as f:
+        checksum = zlib.adler32(f.read())
+    return f'{checksum:08x}'
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print(f"Usage: {sys.argv[0]} <file1> [file2] [file3] ...")
+        sys.exit(1)
+
+    for filename in sys.argv[1:]:
+        try:
+            print(adler32(filename))
+        except IOError as e:
+            print(f"Error: Could not read file '{filename}' - {e}")
+            sys.exit(1)