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path: root/pwmanager/libcrypt/mpi/mpi-cmp.c
authorzautrix <zautrix>2004-10-19 20:16:14 (UTC)
committer zautrix <zautrix>2004-10-19 20:16:14 (UTC)
commiteca49bb06a71980ef61d078904573f25890fc7f2 (patch) (side-by-side diff)
treec5338e3b12430248979a9ac2c1c7e6646ea9ecdf /pwmanager/libcrypt/mpi/mpi-cmp.c
parent53cc32b6e7b1f672bf91b2baf2df6c1e8baf3e0a (diff)
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Initial revision
Diffstat (limited to 'pwmanager/libcrypt/mpi/mpi-cmp.c') (more/less context) (ignore whitespace changes)
-rw-r--r--pwmanager/libcrypt/mpi/mpi-cmp.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/pwmanager/libcrypt/mpi/mpi-cmp.c b/pwmanager/libcrypt/mpi/mpi-cmp.c
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+++ b/pwmanager/libcrypt/mpi/mpi-cmp.c
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+/* mpi-cmp.c - MPI functions
+ * Copyright (C) 1998, 1999, 2001, 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "mpi-internal.h"
+
+int
+gcry_mpi_cmp_ui( gcry_mpi_t u, unsigned long v )
+{
+ mpi_limb_t limb = v;
+
+ _gcry_mpi_normalize( u );
+ if( !u->nlimbs && !limb )
+ return 0;
+ if( u->sign )
+ return -1;
+ if( u->nlimbs > 1 )
+ return 1;
+
+ if( u->d[0] == limb )
+ return 0;
+ else if( u->d[0] > limb )
+ return 1;
+ else
+ return -1;
+}
+
+int
+gcry_mpi_cmp( gcry_mpi_t u, gcry_mpi_t v )
+{
+ mpi_size_t usize, vsize;
+ int cmp;
+
+ _gcry_mpi_normalize( u );
+ _gcry_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;
+ if( !(cmp = _gcry_mpih_cmp( u->d, v->d, usize )) )
+ return 0;
+ if( (cmp < 0?1:0) == (u->sign?1:0))
+ return 1;
+ return -1;
+}
+
+