From 1c2b78a3f2e2de49f5990afdad1e7b4a8716534b Mon Sep 17 00:00:00 2001
From: meh <meh@schizofreni.co>
Date: Tue, 12 May 2015 03:12:55 +0200
Subject: [PATCH] util/dictionary: add Dictionary

---
 src/lib.rs             |  1 +
 src/util/dictionary.rs | 36 ++++++++++++++++++++++++++++++++++++
 src/util/mod.rs        |  1 +
 3 files changed, 38 insertions(+)
 create mode 100644 src/util/dictionary.rs

diff --git a/src/lib.rs b/src/lib.rs
index e8c01e6..e36755a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,3 +7,4 @@ extern crate ffmpeg_sys as ffi;
 
 pub mod util;
 pub use util::error::Error;
+pub use util::dictionary::Dictionary;
diff --git a/src/util/dictionary.rs b/src/util/dictionary.rs
new file mode 100644
index 0000000..69ef36c
--- /dev/null
+++ b/src/util/dictionary.rs
@@ -0,0 +1,36 @@
+use std::marker::PhantomData;
+use std::ptr;
+
+use ffi::*;
+
+pub struct Dictionary<'a> {
+	pub ptr: *mut AVDictionary,
+
+	own:     bool,
+	_marker: PhantomData<&'a i32>,
+}
+
+impl<'a> Dictionary<'a> {
+	pub fn new() -> Self {
+		Dictionary { ptr: ptr::null_mut(), own: true, _marker: PhantomData }
+	}
+
+	pub fn wrap(ptr: *mut AVDictionary) -> Self {
+		Dictionary { ptr: ptr, own: false, _marker: PhantomData }
+	}
+
+	pub fn take(&mut self) -> *mut AVDictionary {
+		self.own = false;
+		self.ptr
+	}
+}
+
+impl<'a> Drop for Dictionary<'a> {
+	fn drop(&mut self) {
+		unsafe {
+			if self.own && self.ptr != ptr::null_mut() {
+				av_dict_free(&mut self.ptr);
+			}
+		}
+	}
+}
diff --git a/src/util/mod.rs b/src/util/mod.rs
index 4b7ef5a..a4a5f89 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -1,3 +1,4 @@
+pub mod dictionary;
 pub mod error;
 
 use std::ffi::CStr;