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93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/* Internal function for converting integers to ASCII.
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Copyright (C) 1994-1999,2002,2003,2007 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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<http://www.gnu.org/licenses/>. */
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#ifndef _ITOA_H
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#define _ITOA_H
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#include <limits.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 char *_itoa (unsigned long long int value, char *buflim,
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unsigned int base, int upper_case);
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extern const char _itoa_upper_digits[];
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extern const char _itoa_upper_digits_internal[] attribute_hidden;
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extern const char _itoa_lower_digits[];
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extern const char _itoa_lower_digits_internal[] attribute_hidden;
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#ifndef NOT_IN_libc
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extern char *_itoa_word (unsigned long value, char *buflim,
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unsigned int base, int upper_case);
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#else
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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
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# if defined IS_IN_rtld
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? INTUSE(_itoa_upper_digits)
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: INTUSE(_itoa_lower_digits)
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# else
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? _itoa_upper_digits
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: _itoa_lower_digits
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# endif
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);
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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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# undef SPECIAL
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#endif
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/* Similar to the _itoa functions, but output starts at buf and pointer
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after the last written character is returned. */
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extern char *_fitoa_word (unsigned long value, char *buf, unsigned int base,
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int upper_case) attribute_hidden;
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extern char *_fitoa (unsigned long long value, char *buf, unsigned int base,
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int upper_case) attribute_hidden;
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#if LONG_MAX == LLONG_MAX
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/* No need for special long long versions. */
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# define _itoa(value, buf, base, upper_case) \
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_itoa_word (value, buf, base, upper_case)
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# define _fitoa(value, buf, base, upper_case) \
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_fitoa_word (value, buf, base, upper_case)
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#endif
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#endif /* itoa.h */
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