34c7dc7b53
Implementation of logic to allow dynamic loading and unloading of meshes and models for scenes larger than RAM in progress --HG-- extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%4090
87 lines
3.5 KiB
C++
87 lines
3.5 KiB
C++
//
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// KRBundle.cpp
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// KREngine
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//
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// Copyright 2012 Kearwood Gilbert. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other materials
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// provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// The views and conclusions contained in the software and documentation are those of the
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// authors and should not be interpreted as representing official policies, either expressed
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// or implied, of Kearwood Gilbert.
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//
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#include "KRBundle.h"
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#include "KRContext.h"
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#include <assert.h>
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typedef struct _tar_header
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{
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char file_name[100];
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char file_mode[8];
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char owner_id[8]; // Owner's numeric user ID (OCTAL!)
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char group_id[8]; // Group's numeric user ID (OCTAL!)
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char file_size[12]; // File size in bytes (OCTAL!)
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char mod_time[12]; // Last modification time in numeric Unix time format
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char checksum[8]; // Checksum for header block
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char file_type[1]; // Link indicator (file type)
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char linked_file[100]; // Name of linked file
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} tar_header_type;
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KRBundle::KRBundle(KRContext &context, std::string name, KRDataBlock *pData) : KRContextObject(context)
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{
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m_pData = pData;
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unsigned char *pFile = (unsigned char *)m_pData->getStart();
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while(pFile < m_pData->getEnd() ) {
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tar_header_type *file_header = (tar_header_type *)pFile;
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size_t file_size = strtol(file_header->file_size, NULL, 8);
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pFile += 512; // Skip past the header to the file contents
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if(file_header->file_name[0] != '\0' && file_header->file_name[0] != '.') {
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// We ignore the last two records in the tar file, which are zero'ed out tar_header structures
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KRDataBlock *pFileData = new KRDataBlock();
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if(pFileData->load(pFile, file_size)) {
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context.loadResource(file_header->file_name, pFileData);
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} else {
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delete pFileData;
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assert(false);
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}
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}
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// Advance past the end of the file
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if((file_size & 0x01ff) == 0) {
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// file size is a multiple of 512 bytes, we can just add it
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pFile += file_size;
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} else {
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// We would not be on a 512 byte boundary, round up to the next one
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pFile += (file_size + 0x0200) - (file_size & 0x1ff);
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}
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}
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}
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KRBundle::~KRBundle()
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{
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delete m_pData;
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}
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