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yaml --- r: 334295 b: refs/heads/master c: 12f008b h: refs/heads/master i: 334293: bc879d7 334291: 4f67706 334287: 1507654 v: v3
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David Howells
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Rusty Russell
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Oct 8, 2012
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/* mpi-cmp.c - MPI functions | ||
* Copyright (C) 1998, 1999 Free Software Foundation, Inc. | ||
* | ||
* This file is part of GnuPG. | ||
* | ||
* GnuPG is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation; either version 2 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* GnuPG is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program; if not, write to the Free Software | ||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | ||
*/ | ||
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#include "mpi-internal.h" | ||
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int mpi_cmp_ui(MPI u, unsigned long v) | ||
{ | ||
mpi_limb_t limb = v; | ||
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mpi_normalize(u); | ||
if (!u->nlimbs && !limb) | ||
return 0; | ||
if (u->sign) | ||
return -1; | ||
if (u->nlimbs > 1) | ||
return 1; | ||
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if (u->d[0] == limb) | ||
return 0; | ||
else if (u->d[0] > limb) | ||
return 1; | ||
else | ||
return -1; | ||
} | ||
EXPORT_SYMBOL_GPL(mpi_cmp_ui); | ||
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int mpi_cmp(MPI u, MPI v) | ||
{ | ||
mpi_size_t usize, vsize; | ||
int cmp; | ||
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mpi_normalize(u); | ||
mpi_normalize(v); | ||
usize = u->nlimbs; | ||
vsize = v->nlimbs; | ||
if (!u->sign && v->sign) | ||
return 1; | ||
if (u->sign && !v->sign) | ||
return -1; | ||
if (usize != vsize && !u->sign && !v->sign) | ||
return usize - vsize; | ||
if (usize != vsize && u->sign && v->sign) | ||
return vsize + usize; | ||
if (!usize) | ||
return 0; | ||
cmp = mpihelp_cmp(u->d, v->d, usize); | ||
if (!cmp) | ||
return 0; | ||
if ((cmp < 0 ? 1 : 0) == (u->sign ? 1 : 0)) | ||
return 1; | ||
return -1; | ||
} | ||
EXPORT_SYMBOL_GPL(mpi_cmp); |