core API: move StrChunks* to metadata

core/src/util/mod.rs

@@ -29,32 +29,6 @@ pub fn powm(base: &BigUint, exp: &BigUint, modulus: &BigUint) -> BigUint {
     result
 }
 
-pub struct StrChunks<'s>(&'s str, usize);
-
-pub trait StrChunksExt {
-    fn chunks(&self, size: usize) -> StrChunks;
-}
-
-impl StrChunksExt for str {
-    fn chunks(&self, size: usize) -> StrChunks {
-        StrChunks(self, size)
-    }
-}
-
-impl<'s> Iterator for StrChunks<'s> {
-    type Item = &'s str;
-    fn next(&mut self) -> Option<&'s str> {
-        let &mut StrChunks(data, size) = self;
-        if data.is_empty() {
-            None
-        } else {
-            let ret = Some(&data[..size]);
-            self.0 = &data[size..];
-            ret
-        }
-    }
-}
-
 pub trait ReadSeek: ::std::io::Read + ::std::io::Seek {}
 impl<T: ::std::io::Read + ::std::io::Seek> ReadSeek for T {}
 

metadata/src/lib.rs

@@ -14,7 +14,6 @@ use linear_map::LinearMap;
 use core::mercury::MercuryError;
 use core::session::Session;
 use core::spotify_id::{FileId, SpotifyId};
-use core::util::StrChunksExt;
 
 pub use protocol::metadata::AudioFile_Format as FileFormat;
 
@@ -215,3 +214,29 @@ impl Metadata for Artist {
         }
     }
 }
+
+struct StrChunks<'s>(&'s str, usize);
+
+trait StrChunksExt {
+    fn chunks(&self, size: usize) -> StrChunks;
+}
+
+impl StrChunksExt for str {
+    fn chunks(&self, size: usize) -> StrChunks {
+        StrChunks(self, size)
+    }
+}
+
+impl<'s> Iterator for StrChunks<'s> {
+    type Item = &'s str;
+    fn next(&mut self) -> Option<&'s str> {
+        let &mut StrChunks(data, size) = self;
+        if data.is_empty() {
+            None
+        } else {
+            let ret = Some(&data[..size]);
+            self.0 = &data[size..];
+            ret
+        }
+    }
+}