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62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
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/* mpn_add_1 --
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Copyright (C) 1993, 1994 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 Library General Public License as published by
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the Free Software Foundation; either version 2 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 Library General Public
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License for more details.
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You should have received a copy of the GNU Library 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#define __mpn_add_1 __noname
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#include "gmp.h"
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#undef __mpn_add_1
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#include "gmp-impl.h"
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mp_limb
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__mpn_add_1 (res_ptr, s1_ptr, s1_size, s2_limb)
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register mp_ptr res_ptr;
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register mp_srcptr s1_ptr;
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register mp_size_t s1_size;
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register mp_limb s2_limb;
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{
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register mp_limb x;
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x = *s1_ptr++;
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s2_limb = x + s2_limb;
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*res_ptr++ = s2_limb;
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if (s2_limb < x)
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{
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while (--s1_size != 0)
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{
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x = *s1_ptr++ + 1;
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*res_ptr++ = x;
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if (x != 0)
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goto fin;
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}
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return 1;
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}
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fin:
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if (res_ptr != s1_ptr)
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{
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mp_size_t i;
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for (i = 0; i < s1_size - 1; i++)
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res_ptr[i] = s1_ptr[i];
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}
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return 0;
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}
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