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//===-- Format specifier converter for strftime -----------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIBC_SRC_STDIO_STRFTIME_CORE_CONVERTER_H
#define LLVM_LIBC_SRC_STDIO_STRFTIME_CORE_CONVERTER_H
#include "hdr/types/struct_tm.h"
#include "src/__support/macros/config.h"
#include "src/stdio/printf_core/writer.h"
#include "src/time/strftime_core/core_structs.h"
#include "composite_converter.h"
#include "num_converter.h"
#include "str_converter.h"
namespace LIBC_NAMESPACE_DECL {
namespace strftime_core {
// convert will call a conversion function to convert the FormatSection into
// its string representation, and then that will write the result to the
// writer.
template <printf_core::WriteMode write_mode>
int convert(printf_core::Writer<write_mode> *writer,
const FormatSection &to_conv, const tm *timeptr) {
// TODO: Implement the locale support.
// Currently locale flags are ignored, as described by the posix standard for
// the default locale.
if (!to_conv.has_conv)
return writer->write(to_conv.raw_string);
switch (to_conv.conv_name) {
// The cases are grouped by type, then alphabetized with lowercase before
// uppercase.
// raw conversions
case '%':
return writer->write("%");
case 'n':
return writer->write("\n");
case 't':
return writer->write("\t");
// numeric conversions
case 'C': // Century [00-99]
case 'd': // Day of the month [01-31]
case 'e': // Day of the month [1-31]
case 'g': // last 2 digits of ISO year [00-99]
case 'G': // ISO year
case 'H': // 24-hour format [00-23]
case 'I': // 12-hour format [01-12]
case 'j': // Day of the year [001-366]
case 'm': // Month of the year [01-12]
case 'M': // Minute of the hour [00-59]
case 's': // Seconds since the epoch
case 'S': // Second of the minute [00-60]
case 'u': // ISO day of the week ([1-7] starting Monday)
case 'U': // Week of the year ([00-53] week 1 starts on first *Sunday*)
case 'V': // ISO week number ([01-53], 01 is first week majority in this year)
case 'w': // Day of week ([0-6] starting Sunday)
case 'W': // Week of the year ([00-53] week 1 starts on first *Monday*)
case 'y': // Year of the Century [00-99]
case 'Y': // Full year
return convert_int(writer, to_conv, timeptr);
// string conversions
case 'a': // Abbreviated weekday name
case 'A': // Full weekday name
case 'b': // Abbreviated month name
case 'B': // Full month name
case 'h': // same as %b
case 'p': // AM/PM designation
return convert_str(writer, to_conv, timeptr);
// composite conversions
case 'c': // locale specified date and time
case 'D': // %m/%d/%y (month/day/year)
case 'F': // %Y-%m-%d (year-month-day)
case 'r': // %I:%M:%S %p (hour:minute:second AM/PM)
case 'R': // %H:%M (hour:minute)
case 'T': // %H:%M:%S (hour:minute:second)
case 'x': // locale specified date
case 'X': // locale specified time
return convert_composite(writer, to_conv, timeptr);
// timezone conversions
case 'z': // Timezone offset (+/-hhmm) (num conv)
case 'Z': // Timezone name (string conv)
// the standard says if no time zone is determinable, write no characters.
// Leave this here until time zones are implemented.
return 0;
default:
return writer->write(to_conv.raw_string);
}
return 0;
}
} // namespace strftime_core
} // namespace LIBC_NAMESPACE_DECL
#endif // LLVM_LIBC_SRC_STDIO_STRFTIME_CORE_CONVERTER_H
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