From a873c1c83cffdce872361b738bfa32ce04507a07 Mon Sep 17 00:00:00 2001
From: Pasukhin Dmitry <dpasukhi@opencascade.com>
Date: Sat, 6 Dec 2025 19:17:37 +0000
Subject: [PATCH] Coding - Refactor RWStepAP214 module to use custom hasher for
 string_view types (#888)

- Introduced StringViewHasher for efficient hashing of std::string_view using OCCT utilities.
- Updated THE_TYPENUMS and THE_TYPESHOR maps to utilize StringViewDataMap with the new hasher.
- Modified initialization functions to accept the new map type for better type safety and clarity.
---
 .../RWStepAP214_ReadWriteModule.cxx           | 27 +++++++++++++++----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/src/DataExchange/TKDESTEP/RWStepAP214/RWStepAP214_ReadWriteModule.cxx b/src/DataExchange/TKDESTEP/RWStepAP214/RWStepAP214_ReadWriteModule.cxx
index 4b791cb131..e0a6bcd430 100644
--- a/src/DataExchange/TKDESTEP/RWStepAP214/RWStepAP214_ReadWriteModule.cxx
+++ b/src/DataExchange/TKDESTEP/RWStepAP214/RWStepAP214_ReadWriteModule.cxx
@@ -2979,15 +2979,32 @@ static constexpr std::string_view s_CGRR("CGRR");
 
 // -- Definition of the libraries --
 
+// Hasher for std::string_view using OCCT hash utilities.
+struct StringViewHasher
+{
+  size_t operator()(const std::string_view& theKey) const noexcept
+  {
+    const int aLen = static_cast<int>(theKey.size());
+    return opencascade::hashBytes(theKey.data(), aLen);
+  }
+
+  bool operator()(const std::string_view& theK1, const std::string_view& theK2) const noexcept
+  {
+    return theK1 == theK2;
+  }
+};
+
+using StringViewDataMap = NCollection_DataMap<std::string_view, Standard_Integer, StringViewHasher>;
+
 // Static maps for theTypenums and theTypeshor
-NCollection_DataMap<std::string_view, Standard_Integer> THE_TYPENUMS;
+static StringViewDataMap THE_TYPENUMS;
 // Static map for theTypeshor
-NCollection_DataMap<std::string_view, Standard_Integer> THE_TYPESHOR;
+static StringViewDataMap THE_TYPESHOR;
 // Static allocator for the maps
-Handle(NCollection_IncAllocator) THE_INC_ALLOCATOR;
+static Handle(NCollection_IncAllocator) THE_INC_ALLOCATOR;
 
 // Initialize theTypenums map
-static void initializeTypenums(NCollection_DataMap<std::string_view, Standard_Integer>& theTypenums)
+static void initializeTypenums(StringViewDataMap& theTypenums)
 {
   theTypenums.Clear(THE_INC_ALLOCATOR);
   theTypenums.ReSize(1024);
@@ -3743,7 +3760,7 @@ static void initializeTypenums(NCollection_DataMap<std::string_view, Standard_In
 }
 
 // Initialize theTypeshor map
-static void initializeTypeshor(NCollection_DataMap<std::string_view, Standard_Integer>& theTypeshor)
+static void initializeTypeshor(StringViewDataMap& theTypeshor)
 {
   theTypeshor.Clear(THE_INC_ALLOCATOR);
   theTypeshor.ReSize(528);