From d3244dc7772d11041314554e5862c0dfb6cfb265 Mon Sep 17 00:00:00 2001
From: Capostrophic <alexdobrohotov@yandex.ru>
Date: Tue, 10 Mar 2020 22:50:12 +0300
Subject: [PATCH] Don't save space in compressed BSA hash generation

---
 components/bsa/compressedbsafile.cpp | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/components/bsa/compressedbsafile.cpp b/components/bsa/compressedbsafile.cpp
index ba96ee8de..d0bebe3c1 100644
--- a/components/bsa/compressedbsafile.cpp
+++ b/components/bsa/compressedbsafile.cpp
@@ -422,7 +422,8 @@ void CompressedBSAFile::convertCompressedSizesToUncompressed()
 std::uint64_t CompressedBSAFile::generateHash(std::string stem, std::string extension) const
 {
     size_t len = stem.length();
-    if (len == 0) return 0;
+    if (len == 0)
+        return 0;
     std::uint64_t hash = 0;
     unsigned int hash2 = 0;
     Misc::StringUtils::lowerCaseInPlace(stem);
@@ -434,12 +435,19 @@ std::uint64_t CompressedBSAFile::generateHash(std::string stem, std::string exte
         for (const char &c : extension)
             hash = hash * 0x1003f + c;
     }
-    for (size_t i = 1; i < len-2 && len > 3; i++)
-        hash2 = hash2 * 0x1003f + stem[i];
+    if (len >= 4)
+    {
+        for (size_t i = 1; i < len-2; i++)
+            hash2 = hash2 * 0x1003f + stem[i];
+    }
     hash = (hash + hash2) << 32;
     hash2 = (stem[0] << 24) | (len << 16);
-    if (len >= 3) hash2 |= stem[len-2] << 8;
-    if (len >= 2) hash2 |= stem[len-1];
+    if (len >= 2)
+    {
+        if (len >= 3)
+            hash2 |= stem[len-2] << 8;
+        hash2 |= stem[len-1];
+    }
     if (!extension.empty())
     {
         if (extension == ".kf")       hash2 |= 0x80;