Support for int128 to string type conversion.

PiperOrigin-RevId: 542269673
Change-Id: Ib6f7e9a57f83d73dd6fb9c45fc9f85ff0fdd75fe

1 files changed, 12 insertions, 0 deletions

diff --git a/absl/numeric/int128.cc b/absl/numeric/int128.cc
index 6ffe43d5..daa32b51 100644
--- a/absl/numeric/int128.cc
+++ b/absl/numeric/int128.cc
@@ -202,6 +202,10 @@ std::string Uint128ToFormattedString(uint128 v, std::ios_base::fmtflags flags) {
 
 }  // namespace
 
+std::string uint128::ToString() const {
+  return Uint128ToFormattedString(*this, std::ios_base::dec);
+}
+
 std::ostream& operator<<(std::ostream& os, uint128 v) {
   std::ios_base::fmtflags flags = os.flags();
   std::string rep = Uint128ToFormattedString(v, flags);
@@ -285,6 +289,14 @@ int128 operator%(int128 lhs, int128 rhs) {
 }
 #endif  // ABSL_HAVE_INTRINSIC_INT128
 
+std::string int128::ToString() const {
+  std::string rep;
+  if (Int128High64(*this) < 0) rep = "-";
+  rep.append(Uint128ToFormattedString(UnsignedAbsoluteValue(*this),
+                                      std::ios_base::dec));
+  return rep;
+}
+
 std::ostream& operator<<(std::ostream& os, int128 v) {
   std::ios_base::fmtflags flags = os.flags();
   std::string rep;