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//===-- Implementation of strftime function -------------------------------===//
//
// 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 "src/time/strftime.h"
#include "hdr/types/size_t.h"
#include "hdr/types/struct_tm.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
#include "src/stdio/printf_core/writer.h"
#include "src/time/strftime_core/strftime_main.h"
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(size_t, strftime,
(char *__restrict buffer, size_t buffsz,
const char *__restrict format, const tm *timeptr)) {
printf_core::WriteBuffer<printf_core::Mode<
printf_core::WriteMode::FILL_BUFF_AND_DROP_OVERFLOW>::value>
wb(buffer, (buffsz > 0 ? buffsz - 1 : 0));
printf_core::Writer writer(wb);
int ret = strftime_core::strftime_main(&writer, format, timeptr);
if (buffsz > 0) // if the buffsz is 0 the buffer may be a null pointer.
wb.buff[wb.buff_cur] = '\0';
return (ret < 0 || static_cast<size_t>(ret) > buffsz) ? 0 : ret;
}
} // namespace LIBC_NAMESPACE_DECL
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