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/*
* mp32number.c
*
* Multiple precision numbers, code
*
* Copyright (c) 1997, 1998, 1999, 2000, 2001 Virtual Unlimited B.V.
*
* Author: Bob Deblier <bob@virtualunlimited.com>
*
* This library 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.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#define BEECRYPT_DLL_EXPORT
#include "mp32number.h"
#include "mp32.h"
#if HAVE_STDLIB_H
# include <stdlib.h>
#endif
#if HAVE_MALLOC_H
# include <malloc.h>
#endif
void mp32nzero(mp32number* n)
{
n->size = 0;
n->data = (uint32*) 0;
}
void mp32nsize(mp32number* n, uint32 size)
{
if (size)
{
if (n->data)
{
if (n->size != size)
n->data = (uint32*) realloc(n->data, size * sizeof(uint32));
}
else
n->data = (uint32*) malloc(size * sizeof(uint32));
if (n->data == (uint32*) 0)
n->size = 0;
else
n->size = size;
}
else if (n->data)
{
free(n->data);
n->data = (uint32*) 0;
n->size = 0;
}
}
void mp32ninit(mp32number* n, uint32 size, const uint32* data)
{
n->size = size;
n->data = (uint32*) malloc(size * sizeof(uint32));
if (n->data)
mp32copy(size, n->data, data);
}
void mp32nfree(mp32number* n)
{
if (n->data)
{
free(n->data);
n->data = (uint32*) 0;
}
n->size = 0;
}
void mp32ncopy(mp32number* n, const mp32number* copy)
{
mp32nset(n, copy->size, copy->data);
}
void mp32nwipe(mp32number* n)
{
mp32zero(n->size, n->data);
}
void mp32nset(mp32number* n, uint32 size, const uint32* data)
{
if (size)
{
if (n->data)
{
if (n->size != size)
n->data = (uint32*) realloc(n->data, size * sizeof(uint32));
}
else
n->data = (uint32*) malloc(size * sizeof(uint32));
if (n->data)
mp32copy(n->size = size, n->data, data);
else
n->size = 0;
}
else if (n->data)
{
free(n->data);
n->data = (uint32*) 0;
n->size = 0;
}
}
void mp32nsetw(mp32number* n, uint32 val)
{
if (n->data)
{
if (n->size != 1)
n->data = (uint32*) realloc(n->data, sizeof(uint32));
}
else
n->data = (uint32*) malloc(sizeof(uint32));
if (n->data)
{
n->size = 1;
n->data[0] = val;
}
else
n->size = 0;
}
void mp32nsethex(mp32number* n, const char* hex)
{
uint32 length = strlen(hex);
uint32 size = (length+7) >> 3;
uint8 rem = (uint8)(length & 0x7);
if (n->data)
{
if (n->size != size)
n->data = (uint32*) realloc(n->data, size * sizeof(uint32));
}
else
n->data = (uint32*) malloc(size * sizeof(uint32));
if (n->data)
{
register uint32 val = 0;
register uint32* dst = n->data;
register char ch;
n->size = size;
while (length-- > 0)
{
ch = *(hex++);
val <<= 4;
if (ch >= '0' && ch <= '9')
val += (ch - '0');
else if (ch >= 'A' && ch <= 'F')
val += (ch - 'A') + 10;
else if (ch >= 'a' && ch <= 'f')
val += (ch - 'a') + 10;
if ((length & 0x7) == 0)
{
*(dst++) = val;
val = 0;
}
}
if (rem)
*dst = val;
}
else
n->size = 0;
}
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