more t5 stuffs

src/Common/Game/T5/CommonT5.cpp

@@ -0,0 +1,55 @@
+#include "CommonT5.h"
+
+#include <cctype>
+
+int CommonT5::Com_HashKey(const char* str, const int maxLen)
+{
+    if (str == nullptr)
+        return 0;
+
+    int hash = 0;
+    for (int i = 0; i < maxLen; i++)
+    {
+        if (str[i] == '\0')
+            break;
+
+        hash += str[i] * (0x77 + i);
+    }
+
+    return hash ^ ((hash ^ (hash >> 10)) >> 10);
+}
+
+int CommonT5::Com_HashString(const char* str)
+{
+    if (!str)
+        return 0;
+
+    auto result = 0x1505;
+    auto offset = 0;
+    while (str[offset])
+    {
+        const auto c = tolower(str[offset++]);
+        result = c + 33 * result;
+    }
+
+    return result;
+}
+
+int CommonT5::Com_HashString(const char* str, const int len)
+{
+    if (!str)
+        return 0;
+
+    int result = 0x1505;
+    int offset = 0;
+    while (str[offset])
+    {
+        if (len > 0 && offset >= len)
+            break;
+
+        const int c = tolower(str[offset++]);
+        result = c + 33 * result;
+    }
+
+    return result;
+}

src/Common/Game/T5/CommonT5.h

@@ -0,0 +1,9 @@
+#pragma once
+
+class CommonT5
+{
+public:
+    static int Com_HashKey(const char* str, int maxLen);
+    static int Com_HashString(const char* str);
+    static int Com_HashString(const char* str, int len);
+};