[libc-commits] [libc] [libc] Implement strftime (PR #111305)

[Michael Jones via libc-commits]

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@@ -0,0 +1,55 @@
+//===-- Format specifier converter for printf -------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See htto_conv.times://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_STDIO_STRFTIME_CORE_STR_CONVERTER_H
+#define LLVM_LIBC_SRC_STDIO_STRFTIME_CORE_STR_CONVERTER_H
+
+#include "src/__support/CPP/string_view.h"
+#include "src/__support/integer_to_string.h"
+#include "src/stdio/printf_core/writer.h"
+#include "src/time/strftime_core/core_structs.h"
+#include "src/time/strftime_core/time_internal_def.h"
+
+namespace LIBC_NAMESPACE_DECL {
+namespace strftime_core {
+
+int write_str(printf_core::Writer *writer, const FormatSection &to_conv) {
+  cpp::string_view str;
+  auto &time = *to_conv.time;
+  switch (to_conv.conv_name) {
+  case 'a':
+    str = safe_abbreviated_day_name(time.tm_wday);
+    break;
+  case 'A':
+    str = safe_day_name(time.tm_wday);
+    break;
+  case 'b':
+    str = safe_abbreviated_month_name(time.tm_mon);
+    break;
+  case 'B':
+    str = safe_month_name(time.tm_mon);
+    break;
+  case 'p':
+    str = to_conv.time->tm_hour >= 12 ? default_PM_str : default_AM_str;
+    break;
+  case 'z':
+    str = default_timezone_offset;
+    break;
+  case 'Z':
+    str = default_timezone_name;
+    break;
+  default:
+    return writer->write(to_conv.raw_string);
+  }
+  return writer->write(str);
+}
----------------
michaelrj-google wrote:

why is this separate from the main `switch` in `converter.cpp`?

https://github.com/llvm/llvm-project/pull/111305