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

[Petr Hosek via libc-commits]

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In-Reply-To: <llvm.org/llvm/llvm-project/pull/110363 at github.com>


================
@@ -0,0 +1,215 @@
+//===-- Implementation of timezone functions ------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <fcntl.h>
+#include <stdio.h> // TODO: Remove all printf functions
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "src/__support/common.h"
+#include "src/time/timezone.h"
+
+namespace LIBC_NAMESPACE_DECL {
+namespace timezone {
+
+tzset *get_tzset(int fd, size_t filesize) {
+  static tzset result;
+
+  int64_t magic;
+  unsigned char version;
+  __int128_t reserved;
+  uint32_t tzh_ttisutcnt;
+  uint32_t tzh_ttisstdcnt;
+  uint32_t tzh_leapcnt;
+  uint32_t tzh_timecnt;
+  uint32_t tzh_typecnt;
+  uint32_t tzh_charcnt;
+
+  size_t i;
+  __uint128_t tmp;
+
+  unsigned char hdr[filesize];
----------------
petrhosek wrote:

Define the local variables only when needed to limit their scope.

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