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Add variant of Ref::get_stored_hash() to get stored hash with custom hasher

This commit is contained in:
Matthias Beyer 2016-09-05 14:23:47 +02:00
parent 5399b8ca7b
commit 55846168dc
1 changed files with 7 additions and 2 deletions
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9
libimagref/src/reference.rs
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@ -239,8 +239,13 @@ impl<'a> Ref<'a> {
/// Get the hash of the link target which is stored in the ref object
pub fn get_stored_hash(&self) -> Result<String> {
let hasher_name = DefaultHasher::new().hash_name();
match self.0.get_header().read(&format!("ref.content_hash.{}", hasher_name)[..]) {
self.get_stored_hash_with_hasher(&DefaultHasher::new())
}
/// Get the hahs of the link target which is stored in the ref object, which is hashed with a
/// custom Hasher instance.
pub fn get_stored_hash_with_hasher<H: Hasher>(&self, h: &H) -> Result<String> {
match self.0.get_header().read(&format!("ref.content_hash.{}", h.hash_name())[..]) {
// content hash stored...
Ok(Some(Value::String(s))) => Ok(s),