From 79b7d575324753b0920a1ba4ceab6409ace999e4 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Wed, 14 Mar 2018 20:27:11 +0000
Subject: Add a string_view accessor for MemMap

---
 libadhocutil/fileUtils.h                 | 8 ++++++++
 libadhocutil/unittests/testFileUtils.cpp | 9 +++++++++
 2 files changed, 17 insertions(+)

diff --git a/libadhocutil/fileUtils.h b/libadhocutil/fileUtils.h
index 4224643..56ece22 100644
--- a/libadhocutil/fileUtils.h
+++ b/libadhocutil/fileUtils.h
@@ -4,6 +4,7 @@
 #include <boost/filesystem/path.hpp>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <string_view>
 #include "visibility.h"
 
 namespace AdHoc {
@@ -150,6 +151,13 @@ namespace AdHoc {
 				/// The file data.
 				void * const data;
 
+				template<typename T = char>
+				auto
+				sv() const 
+				{
+					return std::basic_string_view<T>((const T *)data, st.st_size / sizeof(T));
+				}
+
 			private:
 				DLL_PUBLIC void * setupMapInt(int flags) const;
 				DLL_PUBLIC void * setupMap(int flags) const;
diff --git a/libadhocutil/unittests/testFileUtils.cpp b/libadhocutil/unittests/testFileUtils.cpp
index 973b9bb..01f1738 100644
--- a/libadhocutil/unittests/testFileUtils.cpp
+++ b/libadhocutil/unittests/testFileUtils.cpp
@@ -103,6 +103,15 @@ BOOST_AUTO_TEST_CASE( memmap )
 	BOOST_REQUIRE(f.fh);
 	BOOST_REQUIRE_EQUAL(f.getStat().st_mode, 0100644);
 	BOOST_REQUIRE_EQUAL(0, memcmp(f.data, "#define BOOST_TEST_MODULE FileUtils", 35));
+	// String things
+	auto s = f.sv();
+	BOOST_REQUIRE_EQUAL(s.substr(0, 35), "#define BOOST_TEST_MODULE FileUtils");
+	BOOST_REQUIRE_EQUAL(s.length(), f.getStat().st_size);
+	// Objects
+	auto i = f.sv<int>();
+	BOOST_REQUIRE_EQUAL(i[0], *reinterpret_cast<const int *>("#def"));
+	BOOST_REQUIRE_EQUAL(i[1], *reinterpret_cast<const int *>("ine "));
+	BOOST_REQUIRE_EQUAL(i.length(), f.getStat().st_size / sizeof(int));
 }
 
 BOOST_AUTO_TEST_CASE( openmode )
-- 
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