chore(3p/nix): apply google-readability-casting r/1619

Command run: jq <compile_commands.json -r 'map(.file)|.[]' | grep -v '/generated/' | parallel clang-tidy -p compile_commands.json -checks=-*,google-readability-casting --fix

Manual fixes applied in src/nix-env/nix-env.cc, src/libstore/store-api.cc

Change-Id: I406b4be9368c557ca59329bf6f7002704e955f8d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1557
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: tazjin <mail@tazj.in>

1 files changed, 3 insertions, 2 deletions

diff --git a/third_party/nix/src/libstore/gc.cc b/third_party/nix/src/libstore/gc.cc
index a491d7e32c48..596046e4f324 100644
--- a/third_party/nix/src/libstore/gc.cc
+++ b/third_party/nix/src/libstore/gc.cc
@@ -241,7 +241,8 @@ void LocalStore::findTempRoots(FDs& fds, Roots& tempRoots, bool censor) {
     std::string::size_type pos = 0;
     std::string::size_type end;
 
-    while ((end = contents.find((char)0, pos)) != std::string::npos) {
+    while ((end = contents.find(static_cast<char>(0), pos)) !=
+           std::string::npos) {
       Path root(contents, pos, end - pos);
       DLOG(INFO) << "got temporary root " << root;
       assertStorePath(root);
@@ -916,7 +917,7 @@ void LocalStore::autoGC(bool sync) {
       throw SysError("getting filesystem info about '%s'", realStoreDir);
     }
 
-    return (uint64_t)st.f_bavail * st.f_bsize;
+    return static_cast<uint64_t>(st.f_bavail) * st.f_bsize;
   };
 
   std::shared_future<void> future;