[tor-commits] [tor/master] minimize scope for unsafe

[nickm]

commit 0c04b54d4d78f7f3117948358b3d05e644fa1aeb
Author: Chelsea Holland Komlo <m...@chelseakomlo.com>
Date:   Thu Sep 28 03:08:37 2017 +0000

    minimize scope for unsafe
    
    update documentation
    
    missing check for null
---
 src/common/rust_types.c       | 2 +-
 src/or/protover_rust.c        | 2 +-
 src/rust/external/external.rs | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/common/rust_types.c b/src/common/rust_types.c
index d116b515b..1b6dd3990 100644
--- a/src/common/rust_types.c
+++ b/src/common/rust_types.c
@@ -26,7 +26,7 @@ move_rust_str_to_c_and_free(rust_str_ref_t src, char **dest)
   }
 
   if (!dest) {
-    log_warn(LD_BUG, "Received a null pointer from caller to protover rust. "
+    log_warn(LD_BUG, "Received a null pointer from caller to rust. "
              "This results in a memory leak due to not freeing the rust "
              "string that was meant to be copied..");
     return;
diff --git a/src/or/protover_rust.c b/src/or/protover_rust.c
index ebe815357..261555d1e 100644
--- a/src/or/protover_rust.c
+++ b/src/or/protover_rust.c
@@ -85,7 +85,7 @@ protover_all_supported(const char *s, char **missing_out)
   rust_str_ref_t missing_out_copy = NULL;
   int is_supported  = rust_protover_all_supported(s, &missing_out_copy);
 
-  if (!is_supported) {
+  if (!is_supported && missing_out_copy != NULL) {
     move_rust_str_to_c_and_free(missing_out_copy, missing_out);
   }
 
diff --git a/src/rust/external/external.rs b/src/rust/external/external.rs
index 0e8d1eb0d..f3267949c 100644
--- a/src/rust/external/external.rs
+++ b/src/rust/external/external.rs
@@ -24,6 +24,6 @@ pub fn c_tor_version_as_new_as(platform: &str, cutoff: &str) 
-> bool {
     let result: c_int;
     unsafe {
         result = tor_version_as_new_as(c_platform.as_ptr(), c_cutoff.as_ptr());
-        result == 1
     }
+    result == 1
 }



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