From 66b9e401a5ceb86bd6807cc2127aadf9b3674c27 Mon Sep 17 00:00:00 2001
From: Marek Wiewiorski <marek@mwicat.com>
Date: Mon, 19 Aug 2024 21:24:24 +0200
Subject: [PATCH] bugfix: fix "attempt to shift left with overflow" exception
 when 1<<32 expression results in overflow for i32 type

---
 src/reader.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/reader.rs b/src/reader.rs
index afeb8a9..c5bfd8e 100644
--- a/src/reader.rs
+++ b/src/reader.rs
@@ -209,7 +209,11 @@ fn decode_truncated_block_i32(data: &[u8], bit_size: usize) -> Vec<i32> {
         for i in 0..((bit_size + 7) / 8) {
             temp |= (data[byte_offset + i] as i32) << (i * 8);
         }
-        let value = (temp >> bit_remainder) & ((1 << bit_size) - 1);
+        let mut bit_mask: i32 = 0;
+        for i in 0..bit_size {
+            bit_mask |= 1<<i;
+        }
+        let value = (temp >> bit_remainder) & bit_mask;
         samples.push(value);
 
         bit_offset += bit_size;