From 48210e6925658163952e458a4d13629ffdb0cea3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20G=C3=BCndling?= <felix.guendling@gmail.com>
Date: Thu, 10 Oct 2024 13:05:34 +0200
Subject: [PATCH] I/O helpers

---
 include/cista/io.h | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 include/cista/io.h

diff --git a/include/cista/io.h b/include/cista/io.h
new file mode 100644
index 00000000..36dba58e
--- /dev/null
+++ b/include/cista/io.h
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <filesystem>
+
+#include "cista/memory_holder.h"
+#include "cista/serialization.h"
+
+namespace cista {
+
+template <mode Mode = mode::WITH_STATIC_VERSION | mode::WITH_INTEGRITY,
+          typename T>
+void write(std::filesystem::path const& p, T const& w) {
+  auto mmap =
+      cista::mmap{p.generic_string().c_str(), cista::mmap::protection::WRITE};
+  auto writer = cista::buf<cista::mmap>(std::move(mmap));
+  cista::serialize<Mode>(writer, w);
+}
+
+template <mode Mode = mode::WITH_STATIC_VERSION | mode::WITH_INTEGRITY,
+          typename T>
+void write(std::filesystem::path const& p, wrapped<T> const& w) {
+  write<Mode>(p, *w);
+}
+
+template <typename T,
+          mode Mode = mode::WITH_STATIC_VERSION | mode::WITH_INTEGRITY>
+cista::wrapped<T> read(std::filesystem::path const& p) {
+  auto b = cista::file{p.generic_string().c_str(), "r"}.content();
+  auto const ptr = cista::deserialize<T, Mode>(b);
+  auto mem = cista::memory_holder{std::move(b)};
+  return cista::wrapped{std::move(mem), ptr};
+}
+
+template <typename T,
+          mode Mode = mode::WITH_STATIC_VERSION | mode::WITH_INTEGRITY>
+cista::wrapped<T> read_mmap(std::filesystem::path const& p) {
+  auto mmap =
+      cista::mmap{p.generic_string().c_str(), cista::mmap::protection::READ};
+  auto const ptr = cista::deserialize<T, Mode>(mmap);
+  auto mem = cista::memory_holder{buf{std::move(mmap)}};
+  return cista::wrapped{std::move(mem), ptr};
+}
+
+}  // namespace cista
\ No newline at end of file