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/**
* $Id$
*
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU 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.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
* connect the data stream processors
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "zlib.h"
#include "GEN_messaging.h"
#include "BLO_writeStreamGlue.h"
#include "BLO_dumpFromMemory.h"
#include "BLO_writeblenfile.h"
#include "BLO_deflate.h"
#include "BLO_encrypt.h"
#include "BLO_sign.h"
/**
* streamGlueWrite does not really stream; it buffers all data it gets
* because it needs everything to create the header, which is in front
* of the data (to make reading easier, which occurs much more often
* than writing and is thus more important to optimize for).
* @param streamControl contains a list of Glue actions. Every
* streamGlueWrite constructor eats up the next first action.
*/
int
writeStreamGlue(
struct streamGlueControlStruct *streamGlueControl,
struct writeStreamGlueStruct **streamGlue,
unsigned char *data,
unsigned int dataIn,
int finishUp)
{
int err = 0;
if (NULL == *streamGlue) {
/* we are called for the first time; play constructor */
(*streamGlue) = malloc(sizeof(struct writeStreamGlueStruct));
if (!(*streamGlue)) {
err = BWS_SETFUNCTION(BWS_WRITESTREAMGLUE) |
BWS_SETGENERR(BWS_MALLOC);
return err;
}
(*streamGlue)->dataProcessorType =
streamGlueControlGetNextAction(streamGlueControl);
(*streamGlue)->streamBufferCount = 0;
(*streamGlue)->streamBuffer = NULL;
}
if (dataIn > 0) {
/* simply buffer it */
(*streamGlue)->streamBuffer = realloc((*streamGlue)->streamBuffer,
dataIn + (*streamGlue)->streamBufferCount);
if (!(*streamGlue)->streamBuffer) {
err = BWS_SETFUNCTION(BWS_WRITESTREAMGLUE) |
BWS_SETGENERR(BWS_MALLOC);
free(*streamGlue);
return err;
}
memcpy((*streamGlue)->streamBuffer + (*streamGlue)->streamBufferCount,
data, dataIn);
(*streamGlue)->streamBufferCount += dataIn;
}
if (finishUp) {
/* all data is in, create header and call data processor */
/* first create the streamGlueHeaderStruct */
struct streamGlueHeaderStruct *streamGlueHeader;
streamGlueHeader = malloc(STREAMGLUEHEADERSIZE);
if (!streamGlueHeader) {
err = BWS_SETFUNCTION(BWS_WRITESTREAMGLUE) |
BWS_SETGENERR(BWS_MALLOC);
free((*streamGlue)->streamBuffer);
free(*streamGlue);
return err;
}
streamGlueHeader->magic = 'A';
streamGlueHeader->totalStreamLength = 0; // set in the actions _end
streamGlueHeader->dataProcessorType =
htonl((*streamGlue)->dataProcessorType);
streamGlueHeader->crc = 0; // set in in the actions _end
#ifndef NDEBUG
fprintf(GEN_errorstream,
"streamGlue: write %d gets %u data + %u streamGlueHeader = %u\n",
(*streamGlue)->dataProcessorType,
(*streamGlue)->streamBufferCount,
STREAMGLUEHEADERSIZE,
(*streamGlue)->streamBufferCount + STREAMGLUEHEADERSIZE);
#endif
/* all data ready, start the right data processor */
switch ((*streamGlue)->dataProcessorType) {
case DUMPFROMMEMORY:
err = BLO_dumpFromMemory((*streamGlue)->streamBuffer,
(*streamGlue)->streamBufferCount,
streamGlueHeader);
break;
case DEFLATE:
err = BLO_deflate((*streamGlue)->streamBuffer,
(*streamGlue)->streamBufferCount,
streamGlueHeader);
break;
case ENCRYPT:
err = BLO_encrypt((*streamGlue)->streamBuffer,
(*streamGlue)->streamBufferCount,
streamGlueHeader);
break;
case SIGN:
err = BLO_sign((*streamGlue)->streamBuffer,
(*streamGlue)->streamBufferCount,
streamGlueHeader);
break;
case WRITEBLENFILE:
err = BLO_writeblenfile((*streamGlue)->streamBuffer,
(*streamGlue)->streamBufferCount,
streamGlueHeader);
break;
default:
#ifndef NDEBUG
fprintf(GEN_errorstream,
"unknown dataProcessorType %d\n",
(*streamGlue)->dataProcessorType);
#endif
err = BWS_SETFUNCTION(BWS_WRITESTREAMGLUE) |
BWS_SETSPECERR(BWS_UNKNOWN);
break;
}
free(streamGlueHeader);
free((*streamGlue)->streamBuffer);
free(*streamGlue);
}
return err;
}
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