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use std::ffi::{CStr, CString}; use std::fmt; use std::marker::PhantomData; use std::ptr; use std::str::from_utf8_unchecked; use super::{Iter, Owned}; use ffi::*; pub struct Ref<'a> { ptr: *const AVDictionary, _marker: PhantomData<&'a ()>, } impl<'a> Ref<'a> { pub unsafe fn wrap(ptr: *const AVDictionary) -> Self { Ref { ptr, _marker: PhantomData, } } pub unsafe fn as_ptr(&self) -> *const AVDictionary { self.ptr } } impl<'a> Ref<'a> { pub fn get(&'a self, key: &str) -> Option<&'a str> { unsafe { let key = CString::new(key).unwrap(); let entry = av_dict_get(self.as_ptr(), key.as_ptr(), ptr::null_mut(), 0); if entry.is_null() { None } else { Some(from_utf8_unchecked( CStr::from_ptr((*entry).value).to_bytes(), )) } } } pub fn iter(&self) -> Iter { unsafe { Iter::new(self.as_ptr()) } } pub fn to_owned<'b>(&self) -> Owned<'b> { self.iter().collect() } } impl<'a> IntoIterator for &'a Ref<'a> { type Item = (&'a str, &'a str); type IntoIter = Iter<'a>; fn into_iter(self) -> Self::IntoIter { self.iter() } } impl<'a> fmt::Debug for Ref<'a> { fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { fmt.debug_map().entries(self.iter()).finish() } }