From c8c12d9c5431dc046251155aeebb05efa074d17d Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Wed, 15 Jul 2020 20:40:53 -0700
Subject: [PATCH] add allocArray()

---
 src/pvxs/sharedArray.h |  3 +++
 src/sharedarray.cpp    | 25 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/src/pvxs/sharedArray.h b/src/pvxs/sharedArray.h
index ee2195a..ea91a2c 100644
--- a/src/pvxs/sharedArray.h
+++ b/src/pvxs/sharedArray.h
@@ -47,6 +47,9 @@ std::ostream& operator<<(std::ostream& strm, ArrayType code);
 PVXS_API
 size_t elementSize(ArrayType type);
 
+//! Return a void array usable for the given storage type
+shared_array<void> allocArray(ArrayType type, size_t count);
+
 namespace detail {
 template<typename T>
 struct CaptureCode;
diff --git a/src/sharedarray.cpp b/src/sharedarray.cpp
index 840b9c3..f7d8cfa 100644
--- a/src/sharedarray.cpp
+++ b/src/sharedarray.cpp
@@ -62,6 +62,31 @@ size_t elementSize(ArrayType type)
     throw std::logic_error("Invalid ArrayType");
 }
 
+shared_array<void> allocArray(ArrayType type, size_t count)
+{
+    switch(type) {
+#define CASE(CODE, TYPE) case ArrayType::CODE: return shared_array<TYPE>(count).castTo<void>()
+    CASE(Bool, bool);
+    CASE(UInt8, uint8_t);
+    CASE(UInt16, uint16_t);
+    CASE(UInt32, uint32_t);
+    CASE(UInt64, uint64_t);
+    CASE(Int8, int8_t);
+    CASE(Int16, int16_t);
+    CASE(Int32, int32_t);
+    CASE(Int64, int64_t);
+    CASE(Float32, float);
+    CASE(Float64, double);
+    CASE(String, std::string);
+    CASE(Value, Value);
+#undef CASE
+    case ArrayType::Null:
+        break;
+    }
+
+    throw std::logic_error("Invalid ArrayType");
+}
+
 namespace detail {
 
 namespace {