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/* FreeRDP: A Remote Desktop Protocol Client
* Routines to set a chunk of memory to a constant.
* vi:ts=4 sw=4:
*
* (c) Copyright 2012 Hewlett-Packard Development Company, L.P.
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing
* permissions and limitations under the License.
*
*/
#include <freerdp/config.h>
#include <string.h>
#include <freerdp/types.h>
#include <freerdp/primitives.h>
#include "prim_internal.h"
/* ========================================================================= */
static pstatus_t general_set_8u(BYTE val, BYTE* pDst, UINT32 len)
{
memset((void*)pDst, (int)val, (size_t)len);
return PRIMITIVES_SUCCESS;
}
/* ------------------------------------------------------------------------- */
static pstatus_t general_zero(void* pDst, size_t len)
{
memset(pDst, 0, len);
return PRIMITIVES_SUCCESS;
}
/* ========================================================================= */
static pstatus_t general_set_32s(INT32 val, INT32* pDst, UINT32 len)
{
INT32* dptr = (INT32*)pDst;
size_t span = 0;
size_t remaining = 0;
primitives_t* prims = NULL;
if (len < 256)
{
while (len--)
*dptr++ = val;
return PRIMITIVES_SUCCESS;
}
/* else quadratic growth memcpy algorithm */
span = 1;
*dptr = val;
remaining = len - 1;
prims = primitives_get();
while (remaining)
{
size_t thiswidth = span;
if (thiswidth > remaining)
thiswidth = remaining;
prims->copy_8u((BYTE*)dptr, (BYTE*)(dptr + span), thiswidth << 2);
remaining -= thiswidth;
span <<= 1;
}
return PRIMITIVES_SUCCESS;
}
/* ------------------------------------------------------------------------- */
static pstatus_t general_set_32u(UINT32 val, UINT32* pDst, UINT32 len)
{
UINT32* dptr = (UINT32*)pDst;
size_t span = 0;
size_t remaining = 0;
primitives_t* prims = NULL;
if (len < 256)
{
while (len--)
*dptr++ = val;
return PRIMITIVES_SUCCESS;
}
/* else quadratic growth memcpy algorithm */
span = 1;
*dptr = val;
remaining = len - 1;
prims = primitives_get();
while (remaining)
{
size_t thiswidth = span;
if (thiswidth > remaining)
thiswidth = remaining;
prims->copy_8u((BYTE*)dptr, (BYTE*)(dptr + span), thiswidth << 2);
remaining -= thiswidth;
span <<= 1;
}
return PRIMITIVES_SUCCESS;
}
/* ------------------------------------------------------------------------- */
void primitives_init_set(primitives_t* prims)
{
/* Start with the default. */
prims->set_8u = general_set_8u;
prims->set_32s = general_set_32s;
prims->set_32u = general_set_32u;
prims->zero = general_zero;
}
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