security-and-privacy/gnupg
security-and-privacy/gnupg
1
0
Fork 0
mirror of git://git.gnupg.org/gnupg.git synced 2025-07-03 22:56:33 +02:00
Code Activity

See ChangeLog: Fri Jul 2 11:45:54 CEST 1999 Werner Koch

Browse source
This commit is contained in:
Werner Koch 1999-07-02 09:50:57 +00:00
parent 28eb86c006
commit 86abac78a2
15 changed files with 366 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files

48
mpi/mpi-bit.c
View file

@ -212,3 +212,51 @@ mpi_rshift( MPI x, MPI a, unsigned n )
x->nlimbs = xsize;
}
/****************
* Shift A by COUNT limbs to the left
* This is used only within the MPI library
*/
void
mpi_lshift_limbs( MPI a, unsigned int count )
{
mpi_ptr_t ap = a->d;
int n = a->nlimbs;
int i;
if( !count || !n )
return;
RESIZE_IF_NEEDED( a, n+count );
for( i = n-1; i >= 0; i-- )
ap[i+count] = ap[i];
for(i=0; i < count; i++ )
ap[i] = 0;
a->nlimbs += count;
}
/****************
* Shift A by COUNT limbs to the right
* This is used only within the MPI library
*/
void
mpi_rshift_limbs( MPI a, unsigned int count )
{
mpi_ptr_t ap = a->d;
mpi_size_t n = a->nlimbs;
unsigned int i;
if( count >= n ) {
a->nlimbs = 0;
return;
}
for( i = 0; i < n - count; i++ )
ap[i] = ap[i+count];
ap[i] = 0;
a->nlimbs -= count;
}