Fix "unsafe narrowing" warnings in absl, 1/n.

Addresses failures with the following, in some files:
-Wshorten-64-to-32
-Wimplicit-int-conversion
-Wsign-compare
-Wsign-conversion
-Wtautological-unsigned-zero-compare

(This specific CL focuses on .h and win32 .inc files.)

Bug: chromium:1292951
PiperOrigin-RevId: 463835431
Change-Id: If8e5f7f651d5cd96035e23e4623bdb08a7fedabe

4 files changed, 16 insertions, 16 deletions

diff --git a/absl/container/internal/hashtablez_sampler.cc b/absl/container/internal/hashtablez_sampler.cc
index efc1be58..5b8cf341 100644
--- a/absl/container/internal/hashtablez_sampler.cc
+++ b/absl/container/internal/hashtablez_sampler.cc
@@ -215,21 +215,20 @@ void SetHashtablezSampleParameterInternal(int32_t rate) {
   }
 }
 
-int32_t GetHashtablezMaxSamples() {
+size_t GetHashtablezMaxSamples() {
   return GlobalHashtablezSampler().GetMaxSamples();
 }
 
-void SetHashtablezMaxSamples(int32_t max) {
+void SetHashtablezMaxSamples(size_t max) {
   SetHashtablezMaxSamplesInternal(max);
   TriggerHashtablezConfigListener();
 }
 
-void SetHashtablezMaxSamplesInternal(int32_t max) {
+void SetHashtablezMaxSamplesInternal(size_t max) {
   if (max > 0) {
     GlobalHashtablezSampler().SetMaxSamples(max);
   } else {
-    ABSL_RAW_LOG(ERROR, "Invalid hashtablez max samples: %lld",
-                 static_cast<long long>(max));  // NOLINT(runtime/int)
+    ABSL_RAW_LOG(ERROR, "Invalid hashtablez max samples: 0");
   }
 }
 
diff --git a/absl/container/internal/hashtablez_sampler.h b/absl/container/internal/hashtablez_sampler.h
index d4016d8a..a89518bb 100644
--- a/absl/container/internal/hashtablez_sampler.h
+++ b/absl/container/internal/hashtablez_sampler.h
@@ -281,9 +281,9 @@ void SetHashtablezSampleParameter(int32_t rate);
 void SetHashtablezSampleParameterInternal(int32_t rate);
 
 // Sets a soft max for the number of samples that will be kept.
-int32_t GetHashtablezMaxSamples();
-void SetHashtablezMaxSamples(int32_t max);
-void SetHashtablezMaxSamplesInternal(int32_t max);
+size_t GetHashtablezMaxSamples();
+void SetHashtablezMaxSamples(size_t max);
+void SetHashtablezMaxSamplesInternal(size_t max);
 
 // Configuration override.
 // This allows process-wide sampling without depending on order of
diff --git a/absl/container/internal/inlined_vector.h b/absl/container/internal/inlined_vector.h
index 54c92a01..741821fa 100644
--- a/absl/container/internal/inlined_vector.h
+++ b/absl/container/internal/inlined_vector.h
@@ -784,9 +784,9 @@ auto Storage<T, N, A>::Erase(ConstIterator<A> from, ConstIterator<A> to)
     -> Iterator<A> {
   StorageView<A> storage_view = MakeStorageView();
 
-  SizeType<A> erase_size = std::distance(from, to);
-  SizeType<A> erase_index =
-      std::distance(ConstIterator<A>(storage_view.data), from);
+  auto erase_size = static_cast<SizeType<A>>(std::distance(from, to));
+  auto erase_index = static_cast<SizeType<A>>(
+      std::distance(ConstIterator<A>(storage_view.data), from));
   SizeType<A> erase_end_index = erase_index + erase_size;
 
   IteratorValueAdapter<A, MoveIterator<A>> move_values(
diff --git a/absl/container/internal/raw_hash_set.h b/absl/container/internal/raw_hash_set.h
index 8f00f097..b8118cd2 100644
--- a/absl/container/internal/raw_hash_set.h
+++ b/absl/container/internal/raw_hash_set.h
@@ -545,7 +545,7 @@ struct GroupSse2Impl {
 
   // Returns a bitmask representing the positions of slots that match hash.
   BitMask<uint32_t, kWidth> Match(h2_t hash) const {
-    auto match = _mm_set1_epi8(hash);
+    auto match = _mm_set1_epi8(static_cast<char>(hash));
     return BitMask<uint32_t, kWidth>(
         static_cast<uint32_t>(_mm_movemask_epi8(_mm_cmpeq_epi8(match, ctrl))));
   }
@@ -557,7 +557,7 @@ struct GroupSse2Impl {
     return NonIterableBitMask<uint32_t, kWidth>(
         static_cast<uint32_t>(_mm_movemask_epi8(_mm_sign_epi8(ctrl, ctrl))));
 #else
-    auto match = _mm_set1_epi8(static_cast<h2_t>(ctrl_t::kEmpty));
+    auto match = _mm_set1_epi8(static_cast<char>(ctrl_t::kEmpty));
     return NonIterableBitMask<uint32_t, kWidth>(
         static_cast<uint32_t>(_mm_movemask_epi8(_mm_cmpeq_epi8(match, ctrl))));
 #endif
@@ -565,14 +565,14 @@ struct GroupSse2Impl {
 
   // Returns a bitmask representing the positions of empty or deleted slots.
   NonIterableBitMask<uint32_t, kWidth> MaskEmptyOrDeleted() const {
-    auto special = _mm_set1_epi8(static_cast<uint8_t>(ctrl_t::kSentinel));
+    auto special = _mm_set1_epi8(static_cast<char>(ctrl_t::kSentinel));
     return NonIterableBitMask<uint32_t, kWidth>(static_cast<uint32_t>(
         _mm_movemask_epi8(_mm_cmpgt_epi8_fixed(special, ctrl))));
   }
 
   // Returns the number of trailing empty or deleted elements in the group.
   uint32_t CountLeadingEmptyOrDeleted() const {
-    auto special = _mm_set1_epi8(static_cast<uint8_t>(ctrl_t::kSentinel));
+    auto special = _mm_set1_epi8(static_cast<char>(ctrl_t::kSentinel));
     return TrailingZeros(static_cast<uint32_t>(
         _mm_movemask_epi8(_mm_cmpgt_epi8_fixed(special, ctrl)) + 1));
   }
@@ -635,7 +635,8 @@ struct GroupAArch64Impl {
     // Clang and GCC optimize countr_zero to rbit+clz without any check for 0,
     // so we should be fine.
     constexpr uint64_t bits = 0x0101010101010101ULL;
-    return countr_zero((mask | ~(mask >> 7)) & bits) >> 3;
+    return static_cast<uint32_t>(countr_zero((mask | ~(mask >> 7)) & bits) >>
+                                 3);
   }
 
   void ConvertSpecialToEmptyAndFullToDeleted(ctrl_t* dst) const {