FreeRDP/libfreerdp/primitives/prim_set.c

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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.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
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#include <string.h>
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#include <freerdp/types.h>
#include <freerdp/primitives.h>
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#include "prim_internal.h"
#include "prim_set.h"
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/* ========================================================================= */
pstatus_t general_set_8u(
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BYTE val,
BYTE *pDst,
INT32 len)
{
memset((void *) pDst, (int) val, (size_t) len);
return PRIMITIVES_SUCCESS;
}
/* ------------------------------------------------------------------------- */
pstatus_t general_zero(
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void *pDst,
size_t len)
{
memset(pDst, 0, len);
return PRIMITIVES_SUCCESS;
}
/* ========================================================================= */
pstatus_t general_set_32s(
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INT32 val,
INT32 *pDst,
INT32 len)
{
INT32 *dptr = (INT32 *) pDst;
size_t span, remaining;
primitives_t *prims;
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;
}
/* ------------------------------------------------------------------------- */
pstatus_t general_set_32u(
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UINT32 val,
UINT32 *pDst,
INT32 len)
{
UINT32 *dptr = (UINT32 *) pDst;
size_t span, remaining;
primitives_t *prims;
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(
const primitives_hints_t *hints,
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;
primitives_init_set_opt(hints, prims);
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}
/* ------------------------------------------------------------------------- */
void primitives_deinit_set(
primitives_t *prims)
{
/* Nothing to do. */
}