64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* mtox -- Convert OPERAND to hexadecimal and return a malloc'ed string
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with the result of the conversion.
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Copyright 1991, 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <string.h>
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#include "mp.h"
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "longlong.h"
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char *
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mtox (const MINT *x)
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{
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mp_size_t xsize = x->_mp_size;
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mp_ptr xp;
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mp_size_t xsign;
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unsigned char *str, *s;
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size_t str_size, alloc_size, i;
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xsign = xsize;
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if (xsize < 0)
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xsize = -xsize;
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/* digits, plus '\0', plus possible '-', for an exact size */
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xp = x->_mp_d;
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MPN_SIZEINBASE_16 (alloc_size, xp, xsize);
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alloc_size += 1 + (xsign < 0);
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str = (unsigned char *) (*__gmp_allocate_func) (alloc_size);
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s = str;
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if (xsign < 0)
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*s++ = '-';
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str_size = mpn_get_str (s, 16, xp, xsize);
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ASSERT (str_size <= alloc_size - (xsign < 0));
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ASSERT (str_size == 1 || *s != 0);
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for (i = 0; i < str_size; i++)
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s[i] = "0123456789abcdef"[s[i]];
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s[str_size] = 0;
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ASSERT (strlen (str) + 1 == alloc_size);
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return (char *) str;
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}
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