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72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* Internal function for converting integers to ASCII.
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Copyright (C) 1994-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _ITOWA_H
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#define _ITOWA_H 1
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#include <features.h>
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#include <wchar.h>
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#include <_itoa.h>
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/* Convert VALUE into ASCII in base BASE (2..36).
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Write backwards starting the character just before BUFLIM.
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Return the address of the first (left-to-right) character in the number.
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Use upper case letters iff UPPER_CASE is nonzero. */
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extern wchar_t *_itowa (unsigned long long int value, wchar_t *buflim,
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unsigned int base, int upper_case);
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static inline wchar_t *
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__attribute__ ((unused, always_inline))
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_itowa_word (_ITOA_WORD_TYPE value, wchar_t *buflim,
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unsigned int base, int upper_case)
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{
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extern const wchar_t _itowa_upper_digits[] attribute_hidden;
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extern const wchar_t _itowa_lower_digits[] attribute_hidden;
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const wchar_t *digits = (upper_case
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? _itowa_upper_digits : _itowa_lower_digits);
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wchar_t *bp = buflim;
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switch (base)
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{
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#define SPECIAL(Base) \
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case Base: \
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do \
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*--bp = digits[value % Base]; \
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while ((value /= Base) != 0); \
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break
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SPECIAL (10);
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SPECIAL (16);
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SPECIAL (8);
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default:
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do
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*--bp = digits[value % base];
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while ((value /= base) != 0);
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}
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return bp;
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}
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#undef SPECIAL
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#if !_ITOA_NEEDED
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/* No need for special long long versions. */
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# define _itowa(value, buf, base, upper_case) \
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_itowa_word (value, buf, base, upper_case)
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#endif
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#endif /* itowa.h */
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