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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 read stream data processors
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "zlib.h"
#include "GEN_messaging.h"
#include "BLO_readStreamGlue.h"
#include "BLO_readStreamGlueLoopBack.h"
#include "BLO_readfile.h"
#include "BLO_inflate.h"
#include "BLO_decrypt.h"
#include "BLO_verify.h"
unsigned int
correctByteOrder(
unsigned int x)
{
unsigned char *s = (unsigned char *)&x;
return (unsigned int)(s[0] << 24 | s[1] << 16 | s[2] << 8 | s[3]);
}
int
readStreamGlue(
void * endControl,
struct readStreamGlueStruct **control,
unsigned char *data,
unsigned int dataIn)
{
int err = 0;
if (NULL == *control) {
/* we are called for the first time; play constructor */
*control = malloc(sizeof (struct readStreamGlueStruct));
if (*control == NULL) {
err = BRS_SETFUNCTION(BRS_READSTREAMGLUE) |
BRS_SETGENERR(BRS_MALLOC);
return err;
}
(*control)->totalStreamLength = 0;
(*control)->streamDone = 0;
(*control)->dataProcessorType = UNKNOWN;
memset((*control)->headerbuffer, 0, STREAMGLUEHEADERSIZE);
(*control)->begin = NULL;
(*control)->process = NULL;
(*control)->end = NULL;
}
/* First check if we have our header filled in yet */
if ((dataIn > 0) && ((*control)->dataProcessorType == 0)) {
unsigned int processed;
processed = ((dataIn + (*control)->streamDone) <= STREAMGLUEHEADERSIZE)
? dataIn : STREAMGLUEHEADERSIZE;
memcpy((*control)->headerbuffer + (*control)->streamDone,
data, processed);
(*control)->streamDone += processed;
dataIn -= processed;
data += processed;
if ((*control)->streamDone == STREAMGLUEHEADERSIZE) {
/* we have the whole header, absorb it */
struct streamGlueHeaderStruct *header;
uint32_t crc;
header = (struct streamGlueHeaderStruct *)
(*control)->headerbuffer;
(*control)->totalStreamLength =
ntohl(header->totalStreamLength);
(*control)->dataProcessorType =
ntohl(header->dataProcessorType);
crc = crc32(0L, (const Bytef *) header, STREAMGLUEHEADERSIZE - 4);
if (header->magic == 'A') {
#ifndef NDEBUG
fprintf(GEN_errorstream,
"streamGlue header read. Magic confirmed\n");
#endif
} else {
err = BRS_SETFUNCTION(BRS_READSTREAMGLUE) |
BRS_SETGENERR(BRS_MAGIC);
free(*control);
(*control) = NULL;
return err;
#ifndef NDEBUG
fprintf(GEN_errorstream,
"ERROR streamGlue header read. Magic NOT confirmed (%c)\n",
header->magic);
#endif
}
if (crc == ntohl(header->crc)) {
#ifndef NDEBUG
fprintf(GEN_errorstream,
"streamGlue header CRC correct\n");
#endif
} else {
err = BRS_SETFUNCTION(BRS_READSTREAMGLUE) |
BRS_SETGENERR(BRS_CRCHEADER);
free(*control);
(*control) = NULL;
return err;
#ifndef NDEBUG
fprintf(GEN_errorstream,
"ERROR streamGlue header CRC NOT correct\n");
#endif
}
// No more header-> usage from this point !
#ifndef NDEBUG
fprintf(GEN_errorstream,
"read action %d will get %u raw bytes\n",
(*control)->dataProcessorType,
(unsigned int) (*control)->totalStreamLength);
#endif
/* Set pointers to the correct dataprocessor functions */
switch ((*control)->dataProcessorType) {
case DUMPTOMEMORY:
case DUMPFROMMEMORY:
(*control)->begin = blo_readstreamfile_begin;
(*control)->process = blo_readstreamfile_process;
(*control)->end = blo_readstreamfile_end;
break;
case READBLENFILE:
case WRITEBLENFILE:
(*control)->begin = readStreamGlueLoopBack_begin;
(*control)->process = readStreamGlueLoopBack_process;
(*control)->end = readStreamGlueLoopBack_end;
break;
case INFLATE:
case DEFLATE:
(*control)->begin = BLO_inflate_begin;
(*control)->process = BLO_inflate_process;
(*control)->end = BLO_inflate_end;
break;
case DECRYPT:
case ENCRYPT:
(*control)->begin = BLO_decrypt_begin;
(*control)->process = BLO_decrypt_process;
(*control)->end = BLO_decrypt_end;
break;
case VERIFY:
case SIGN:
(*control)->begin = BLO_verify_begin;
(*control)->process = BLO_verify_process;
(*control)->end = BLO_verify_end;
break;
default:
err = BRS_SETFUNCTION(BRS_READSTREAMGLUE) |
BRS_SETSPECERR(BRS_UNKNOWN);
(*control) = NULL;
free(*control);
return err;
#ifndef NDEBUG
fprintf(GEN_errorstream,
"unknown dataProcessorType %d\n",
(*control)->dataProcessorType);
#endif
break;
}
/* Call the dataprocessors begin() and
* store its (*control) struct pointer */
(*control)->ProcessorTypeControlStruct =
(*(*control)->begin)(endControl);
if ((*control)->ProcessorTypeControlStruct == NULL) {
free(*control);
(*control) = NULL;
return err;
}
}
}
/* Is there really (still) new data available ? */
if (dataIn > 0) {
err = (*(*control)->process)((*control)->ProcessorTypeControlStruct,
data, dataIn);
if (err) {
free(*control);
(*control) = NULL;
return err;
}
(*control)->streamDone += dataIn;
}
if ((*control)->streamDone == (*control)->totalStreamLength +
STREAMGLUEHEADERSIZE) {
err = (*(*control)->end)((*control)->ProcessorTypeControlStruct);
free(*control);
(*control) = NULL;
}
return err;
}
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