[libc-commits] [libc] [libc] implement localtime (PR #110363)

[Зишан Мирза via libc-commits]

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@@ -129,6 +154,27 @@ int64_t update_from_seconds(int64_t total_seconds, struct tm *tm) {
   if (years > INT_MAX || years < INT_MIN)
     return time_utils::out_of_range();
 
+  char *timezone = (char *)malloc(sizeof(char) * TimeConstants::TIMEZONE_SIZE);
+  timezone = getenv("TZ");
+  FILE *fp = NULL;
+  if (timezone == NULL) {
+    timezone =
+        (char *)realloc(timezone, sizeof(char) * TimeConstants::TIMEZONE_SIZE);
+    fp = fopen("/etc/timezone", "rb");
+    if (fp == NULL) {
+      return time_utils::out_of_range();
+    }
+
+    acquire_file(fp, timezone, TimeConstants::TIMEZONE_SIZE);
+  }
+
+  if (fp != NULL && file_usage == 0) {
+    release_file(fp, timezone);
+    return time_utils::out_of_range();
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zimirza wrote:

Thank you for the feedback. I have now used stack allocation of memory instead of heap allocation.

https://github.com/llvm/llvm-project/pull/110363