| 1 | //===-- Implementation of strftime function -------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/time/strftime.h" |
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| 10 | #include "hdr/types/size_t.h" |
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| 11 | #include "hdr/types/struct_tm.h" |
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| 12 | #include "src/__support/common.h" |
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| 13 | #include "src/__support/macros/config.h" |
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| 14 | #include "src/stdio/printf_core/writer.h" |
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| 15 | #include "src/time/strftime_core/strftime_main.h" |
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| 16 | |
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| 17 | namespace LIBC_NAMESPACE_DECL { |
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| 18 | |
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| 19 | LLVM_LIBC_FUNCTION(size_t, strftime, |
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| 20 | (char *__restrict buffer, size_t buffsz, |
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| 21 | const char *__restrict format, const tm *timeptr)) { |
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| 22 | printf_core::WriteBuffer<printf_core::Mode< |
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| 23 | printf_core::WriteMode::FILL_BUFF_AND_DROP_OVERFLOW>::value> |
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| 24 | wb(buffer, (buffsz > 0 ? buffsz - 1 : 0)); |
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| 25 | printf_core::Writer writer(wb); |
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| 26 | int ret = strftime_core::strftime_main(&writer, format, timeptr); |
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| 27 | if (buffsz > 0) // if the buffsz is 0 the buffer may be a null pointer. |
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| 28 | wb.buff[wb.buff_cur] = '\0'; |
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| 29 | return (ret < 0 || static_cast<size_t>(ret) > buffsz) ? 0 : ret; |
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| 30 | } |
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| 31 | |
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| 32 | } // namespace LIBC_NAMESPACE_DECL |
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| 33 | |
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