[libcxx-commits] [libcxx] [libc++][chrono] Loads leap-seconds.list in tzdb. (PR #82113)

[via libcxx-commits]

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@@ -622,6 +623,36 @@ static void __parse_tzdata(tzdb& __db, __tz::__rules_storage_type& __rules, istr
   }
 }
 
+static void __parse_leap_seconds(vector<leap_second>& __leap_seconds, istream&& __input) {
+  // The file stores dates since 1 January 1900, 00:00:00, we want
+  // seconds since 1 January 1970.
+  constexpr auto __offset = sys_days{1970y / January / 1} - sys_days{1900y / January / 1};
+
+  while (true) {
+    switch (__input.peek()) {
+    case istream::traits_type::eof():
+      return;
+
+    case ' ':
+    case '\t':
+    case '\n':
+      __input.get();
+      continue;
+
+    case '#':
+      chrono::__skip_line(__input);
+      continue;
+    }
+
+    sys_seconds __date = sys_seconds{seconds{chrono::__parse_integral(__input, false)}} - __offset;
+    chrono::__skip_mandatory_whitespace(__input);
+    seconds __value{chrono::__parse_integral(__input, false)};
+    chrono::__skip_line(__input);
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EricWF wrote:

Could you please give the chrono parsing functions a different namespace?

https://github.com/llvm/llvm-project/pull/82113