openpgp: Combine Signature4::signature_alive and its _at variant.

  - Combine Signature4::signature_alive and
    Signature4::signature_alive_at.

  - Use an Into<Option<time::Tm>> to distinguish the two previous
    cases: the current time (None), and a specific time (a time::Tm).

1 files changed, 9 insertions, 12 deletions

diff --git a/openpgp-ffi/src/packet/signature.rs b/openpgp-ffi/src/packet/signature.rs
index ed0691f9..636318b3 100644
--- a/openpgp-ffi/src/packet/signature.rs
+++ b/openpgp-ffi/src/packet/signature.rs
@@ -116,23 +116,20 @@ fn pgp_signature_is_group_key(sig: *const Signature) -> bool {
 }
 
 
-/// Returns whether the signature is alive.
-///
-/// A signature is alive if the creation date is in the past, and the
-/// signature has not expired.
-#[::sequoia_ffi_macros::extern_fn] #[no_mangle] pub extern "C"
-fn pgp_signature_alive(sig: *const Signature) -> bool {
-    sig.ref_raw().signature_alive()
-}
-
 /// Returns whether the signature is alive at the specified time.
 ///
+/// If `when` is 0, then the current time is used.
+///
 /// A signature is alive if the creation date is in the past, and the
 /// signature has not expired at the specified time.
 #[::sequoia_ffi_macros::extern_fn] #[no_mangle] pub extern "C"
-fn pgp_signature_alive_at(sig: *const Signature, when: time_t) -> bool {
-    sig.ref_raw()
-        .signature_alive_at(time::at(time::Timespec::new(when as i64, 0)))
+fn pgp_signature_alive(sig: *const Signature, when: time_t) -> bool {
+    let t = if when == 0 {
+        None
+    } else {
+        Some(time::at(time::Timespec::new(when as i64, 0)))
+    };
+    sig.ref_raw().signature_alive(t)
 }
 
 /// Returns whether the signature is expired at the specified time.