diff options
Diffstat (limited to 'source/blender/readstreamglue/intern/BLO_readStreamGlue.c')
| -rw-r--r-- | source/blender/readstreamglue/intern/BLO_readStreamGlue.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/source/blender/readstreamglue/intern/BLO_readStreamGlue.c b/source/blender/readstreamglue/intern/BLO_readStreamGlue.c new file mode 100644 index 00000000000..5f2754d8628 --- /dev/null +++ b/source/blender/readstreamglue/intern/BLO_readStreamGlue.c @@ -0,0 +1,228 @@ +/** + * $Id$ + * + * ***** 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; +} + |