From 17f43a079be5fdbb38d7992c21acda89ad91bbbd Mon Sep 17 00:00:00 2001
From: jatin <jatinchowdhury18@gmail.com>
Date: Sun, 7 Jul 2024 11:15:24 -0700
Subject: [PATCH] Adding arena helpers

---
 .../DataStructures/chowdsp_StringHelpers.h    |  5 ++++
 .../Helpers/chowdsp_ArenaHelpers.h            | 26 +++++++++++++++++++
 .../chowdsp_data_structures.h                 |  1 +
 3 files changed, 32 insertions(+)
 create mode 100644 modules/common/chowdsp_data_structures/Helpers/chowdsp_ArenaHelpers.h

diff --git a/modules/common/chowdsp_core/DataStructures/chowdsp_StringHelpers.h b/modules/common/chowdsp_core/DataStructures/chowdsp_StringHelpers.h
index fa6662bae..5725ae15e 100644
--- a/modules/common/chowdsp_core/DataStructures/chowdsp_StringHelpers.h
+++ b/modules/common/chowdsp_core/DataStructures/chowdsp_StringHelpers.h
@@ -8,5 +8,10 @@ inline juce::String toString (const std::string_view& sv) noexcept
 {
     return juce::String::fromUTF8 (sv.data(), (int) sv.size());
 }
+
+inline std::string_view toStringView (const juce::String& str) noexcept
+{
+    return { str.toRawUTF8(), str.getNumBytesAsUTF8() };
+}
 #endif
 } // namespace chowdsp
diff --git a/modules/common/chowdsp_data_structures/Helpers/chowdsp_ArenaHelpers.h b/modules/common/chowdsp_data_structures/Helpers/chowdsp_ArenaHelpers.h
new file mode 100644
index 000000000..d10371872
--- /dev/null
+++ b/modules/common/chowdsp_data_structures/Helpers/chowdsp_ArenaHelpers.h
@@ -0,0 +1,26 @@
+#pragma once
+
+namespace chowdsp::arena
+{
+template <typename T, typename I, typename Arena>
+std::span<T> make_span (Arena& arena, I size, size_t alignment = alignof (T))
+{
+  return { arena.template allocate<T> (size, alignment), static_cast<size_t> (size) };
+}
+
+template <typename Arena>
+std::string_view alloc_string (Arena& arena, const std::string_view& str)
+{
+  auto* data = arena.template allocate<char> (str.size());
+  std::copy (str.begin(), str.end(), data);
+  return std::string_view { data, str.size() }; // NOLINT
+};
+
+#if CHOWDSP_USING_JUCE
+template <typename Arena>
+std::string_view alloc_string (Arena& arena, const juce::String& str)
+{
+  return alloc_string (arena, toStringView (str));
+}
+#endif
+}
diff --git a/modules/common/chowdsp_data_structures/chowdsp_data_structures.h b/modules/common/chowdsp_data_structures/chowdsp_data_structures.h
index 17bcfba03..0ee7a2429 100644
--- a/modules/common/chowdsp_data_structures/chowdsp_data_structures.h
+++ b/modules/common/chowdsp_data_structures/chowdsp_data_structures.h
@@ -46,6 +46,7 @@ BEGIN_JUCE_MODULE_DECLARATION
 #include "Allocators/chowdsp_ArenaAllocator.h"
 #include "Allocators/chowdsp_ChainedArenaAllocator.h"
 #include "Allocators/chowdsp_STLArenaAllocator.h"
+#include "Helpers/chowdsp_ArenaHelpers.h"
 
 #include "Structures/chowdsp_BucketArray.h"
 #include "Structures/chowdsp_AbstractTree.h"