Fix "unsafe narrowing" warnings in absl, 9/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 miscellaneous non-test source files.)

Bug: chromium:1292951
PiperOrigin-RevId: 473054605
Change-Id: Ifd7b24966613ca915511a3a607095508068200b8

2 files changed, 3 insertions, 3 deletions

diff --git a/absl/time/duration.cc b/absl/time/duration.cc
index 1f4cf382..911e80f8 100644
--- a/absl/time/duration.cc
+++ b/absl/time/duration.cc
@@ -617,7 +617,7 @@ timespec ToTimespec(Duration d) {
         rep_lo -= kTicksPerSecond;
       }
     }
-    ts.tv_sec = rep_hi;
+    ts.tv_sec = static_cast<decltype(ts.tv_sec)>(rep_hi);
     if (ts.tv_sec == rep_hi) {  // no time_t narrowing
       ts.tv_nsec = rep_lo / kTicksPerNanosecond;
       return ts;
@@ -691,7 +691,7 @@ namespace {
 char* Format64(char* ep, int width, int64_t v) {
   do {
     --width;
-    *--ep = '0' + (v % 10);  // contiguous digits
+    *--ep = static_cast<char>('0' + (v % 10));  // contiguous digits
   } while (v /= 10);
   while (--width >= 0) *--ep = '0';  // zero pad
   return ep;
diff --git a/absl/time/time.cc b/absl/time/time.cc
index 718b88c8..7256a699 100644
--- a/absl/time/time.cc
+++ b/absl/time/time.cc
@@ -297,7 +297,7 @@ timespec ToTimespec(Time t) {
   timespec ts;
   absl::Duration d = time_internal::ToUnixDuration(t);
   if (!time_internal::IsInfiniteDuration(d)) {
-    ts.tv_sec = time_internal::GetRepHi(d);
+    ts.tv_sec = static_cast<decltype(ts.tv_sec)>(time_internal::GetRepHi(d));
     if (ts.tv_sec == time_internal::GetRepHi(d)) {  // no time_t narrowing
       ts.tv_nsec = time_internal::GetRepLo(d) / 4;  // floor
       return ts;