78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/* Internal function for converting integers to ASCII.
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Copyright (C) 1994-2013 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _ITOA_H
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#define _ITOA_H
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/* Convert VALUE into ASCII in base BASE (2..16).
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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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static const char _itoa_lower_digits[16] = "0123456789abcdef";
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static const char _itoa_upper_digits[16] = "0123456789ABCDEF";
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static inline char * __attribute__ ((unused, always_inline))
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_itoa_word (unsigned long value, char *buflim,
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unsigned int base, int upper_case)
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{
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const char *digits = (upper_case ? _itoa_upper_digits : _itoa_lower_digits);
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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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*--buflim = 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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*--buflim = digits[value % base];
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while ((value /= base) != 0);
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}
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return buflim;
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}
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static inline char * __attribute__ ((unused, always_inline))
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_itoa (uint64_t value, char *buflim,
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unsigned int base, int upper_case)
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{
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const char *digits = (upper_case ? _itoa_upper_digits : _itoa_lower_digits);
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switch (base)
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{
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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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*--buflim = digits[value % base];
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while ((value /= base) != 0);
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}
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return buflim;
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}
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# undef SPECIAL
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#endif /* itoa.h */
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