forked from 0ad/0ad
63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
/**
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* =========================================================================
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* File : FilePacker.cpp
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* Project : 0 A.D.
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* Description : Resizable buffer, for writing binary files
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* =========================================================================
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*/
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#include "precompiled.h"
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#include "FilePacker.h"
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#include <string.h>
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#include "lib/res/file/vfs.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// CFilePacker constructor
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// rationale for passing in version + signature here: see header
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CFilePacker::CFilePacker(u32 version, const char magicstr[4])
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{
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// put header in our data array.
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// (size will be updated on every Pack*() call)
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m_Data.resize(12);
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u8* header = (u8*)&m_Data[0];
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strncpy((char*)(header+0), magicstr, 4); // not 0-terminated => no _s
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*(u32*)(header+4) = version;
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*(u32*)(header+8) = 0; // datasize
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// FIXME m_Version: Byte order? -- Simon
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// Write: write out to file all packed data added so far
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void CFilePacker::Write(const char* filename)
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{
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// write out all data (including header)
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if(vfs_store(filename, &m_Data[0], m_Data.size(), FILE_NO_AIO|FILE_WRITE_TO_TARGET) < 0)
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throw PSERROR_File_WriteFailed();
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// PackRaw: pack given number of bytes onto the end of the data stream
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void CFilePacker::PackRaw(const void* rawdata,u32 rawdatalen)
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{
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u32 start=(u32)m_Data.size();
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m_Data.resize(m_Data.size()+rawdatalen);
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cpu_memcpy(&m_Data[start],rawdata,rawdatalen);
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*(u32*)&m_Data[8] += rawdatalen; // FIXME byte order?
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// PackString: pack a string onto the end of the data stream
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void CFilePacker::PackString(const CStr& str)
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{
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u32 len=(u32)str.length();
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PackRaw(&len,sizeof(len));
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PackRaw((const char*) str,len);
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}
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