[flang-commits] [flang] FDATE extension implementation: get date and time in ctime format (PR #71222)

[David Truby via flang-commits]

================
@@ -125,6 +126,33 @@ static bool FitsInDescriptor(
       kind, terminator, value);
 }
 
+void removeNewLine(char *str) {
+  char *newlinePos = strchr(str, '\n');
+  if (newlinePos != NULL) {
+    *newlinePos = '\0'; // Replace with null terminator
+  }
+}
+
+std::int32_t RTNAME(FDate)(const Descriptor *value, const Descriptor *errmsg) {
+  FillWithSpaces(*value);
+
+  time_t current_time;
+  time(&current_time);
+
+  char *time_string = ctime(&current_time);
----------------
DavidTruby wrote:

`ctime` isn't thread safe, but I'm not sure there's a cross platform C function that is; glibc has `ctime_r` but I don't think that exists on Windows or MacOS. I also think we can't depend on the non-header parts of the C++ standard library so we likely can't use `<chrono>`, which _is_ thread safe. Someone else might have a better idea of what to do here. @jeanPerier is my recollection about usage of the C++ standard library correct here?

https://github.com/llvm/llvm-project/pull/71222