1 |
/*************************************************************************** |
/*************************************************************************** |
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* * |
* * |
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* libgig - C++ cross-platform Gigasampler format file loader library * |
* libgig - C++ cross-platform Gigasampler format file access library * |
4 |
* * |
* * |
5 |
* Copyright (C) 2003-2005 by Christian Schoenebeck * |
* Copyright (C) 2003-2007 by Christian Schoenebeck * |
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* <cuse@users.sourceforge.net> * |
* <cuse@users.sourceforge.net> * |
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* * |
* * |
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* This library is free software; you can redistribute it and/or modify * |
* This library is free software; you can redistribute it and/or modify * |
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***************************************************************************/ |
***************************************************************************/ |
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#include <string.h> |
#include <string.h> |
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#include <sstream> |
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26 |
#include "RIFF.h" |
#include "RIFF.h" |
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#include "helper.h" |
29 |
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30 |
namespace RIFF { |
namespace RIFF { |
31 |
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32 |
// *************** Helper Functions ************** |
// *************** Internal functions ************** |
33 |
// * |
// * |
34 |
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|
35 |
template<class T> inline String ToString(T o) { |
/// Returns a human readable path of the given chunk. |
36 |
std::stringstream ss; |
String __resolveChunkPath(Chunk* pCk) { |
37 |
ss << o; |
String sPath; |
38 |
return ss.str(); |
for (Chunk* pChunk = pCk; pChunk; pChunk = pChunk->GetParent()) { |
39 |
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if (pChunk->GetChunkID() == CHUNK_ID_LIST) { |
40 |
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List* pList = (List*) pChunk; |
41 |
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sPath = "->'" + pList->GetListTypeString() + "'" + sPath; |
42 |
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} else { |
43 |
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sPath = "->'" + pChunk->GetChunkIDString() + "'" + sPath; |
44 |
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} |
45 |
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} |
46 |
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return sPath; |
47 |
} |
} |
48 |
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49 |
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58 |
ulPos = 0; |
ulPos = 0; |
59 |
pParent = NULL; |
pParent = NULL; |
60 |
pChunkData = NULL; |
pChunkData = NULL; |
61 |
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ulChunkDataSize = 0; |
62 |
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ChunkID = CHUNK_ID_RIFF; |
63 |
this->pFile = pFile; |
this->pFile = pFile; |
64 |
} |
} |
65 |
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|
72 |
pParent = Parent; |
pParent = Parent; |
73 |
ulPos = 0; |
ulPos = 0; |
74 |
pChunkData = NULL; |
pChunkData = NULL; |
75 |
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ulChunkDataSize = 0; |
76 |
ReadHeader(StartPos); |
ReadHeader(StartPos); |
77 |
} |
} |
78 |
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|
82 |
this->pParent = pParent; |
this->pParent = pParent; |
83 |
ulPos = 0; |
ulPos = 0; |
84 |
pChunkData = NULL; |
pChunkData = NULL; |
85 |
|
ulChunkDataSize = 0; |
86 |
ChunkID = uiChunkID; |
ChunkID = uiChunkID; |
87 |
CurrentChunkSize = 0; |
CurrentChunkSize = 0; |
88 |
NewChunkSize = uiBodySize; |
NewChunkSize = uiBodySize; |
89 |
} |
} |
90 |
|
|
91 |
Chunk::~Chunk() { |
Chunk::~Chunk() { |
92 |
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if (CurrentChunkSize != NewChunkSize) pFile->UnlogResized(this); |
93 |
if (pChunkData) delete[] pChunkData; |
if (pChunkData) delete[] pChunkData; |
94 |
} |
} |
95 |
|
|
101 |
if (lseek(pFile->hFileRead, fPos, SEEK_SET) != -1) { |
if (lseek(pFile->hFileRead, fPos, SEEK_SET) != -1) { |
102 |
read(pFile->hFileRead, &ChunkID, 4); |
read(pFile->hFileRead, &ChunkID, 4); |
103 |
read(pFile->hFileRead, &CurrentChunkSize, 4); |
read(pFile->hFileRead, &CurrentChunkSize, 4); |
104 |
|
#elif defined(WIN32) |
105 |
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if (SetFilePointer(pFile->hFileRead, fPos, NULL/*32 bit*/, FILE_BEGIN) != INVALID_SET_FILE_POINTER) { |
106 |
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DWORD dwBytesRead; |
107 |
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ReadFile(pFile->hFileRead, &ChunkID, 4, &dwBytesRead, NULL); |
108 |
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ReadFile(pFile->hFileRead, &CurrentChunkSize, 4, &dwBytesRead, NULL); |
109 |
#else |
#else |
110 |
if (!fseek(pFile->hFileRead, fPos, SEEK_SET)) { |
if (!fseek(pFile->hFileRead, fPos, SEEK_SET)) { |
111 |
fread(&ChunkID, 4, 1, pFile->hFileRead); |
fread(&ChunkID, 4, 1, pFile->hFileRead); |
113 |
#endif // POSIX |
#endif // POSIX |
114 |
#if WORDS_BIGENDIAN |
#if WORDS_BIGENDIAN |
115 |
if (ChunkID == CHUNK_ID_RIFF) { |
if (ChunkID == CHUNK_ID_RIFF) { |
116 |
bEndianNative = false; |
pFile->bEndianNative = false; |
117 |
} |
} |
118 |
#else // little endian |
#else // little endian |
119 |
if (ChunkID == CHUNK_ID_RIFX) { |
if (ChunkID == CHUNK_ID_RIFX) { |
154 |
write(pFile->hFileWrite, &uiNewChunkID, 4); |
write(pFile->hFileWrite, &uiNewChunkID, 4); |
155 |
write(pFile->hFileWrite, &uiNewChunkSize, 4); |
write(pFile->hFileWrite, &uiNewChunkSize, 4); |
156 |
} |
} |
157 |
|
#elif defined(WIN32) |
158 |
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if (SetFilePointer(pFile->hFileWrite, fPos, NULL/*32 bit*/, FILE_BEGIN) != INVALID_SET_FILE_POINTER) { |
159 |
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DWORD dwBytesWritten; |
160 |
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WriteFile(pFile->hFileWrite, &uiNewChunkID, 4, &dwBytesWritten, NULL); |
161 |
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WriteFile(pFile->hFileWrite, &uiNewChunkSize, 4, &dwBytesWritten, NULL); |
162 |
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} |
163 |
#else |
#else |
164 |
if (!fseek(pFile->hFileWrite, fPos, SEEK_SET)) { |
if (!fseek(pFile->hFileWrite, fPos, SEEK_SET)) { |
165 |
fwrite(&uiNewChunkID, 4, 1, pFile->hFileWrite); |
fwrite(&uiNewChunkID, 4, 1, pFile->hFileWrite); |
243 |
std::cout << "Chunk::GetState()" << std::endl; |
std::cout << "Chunk::GetState()" << std::endl; |
244 |
#endif // DEBUG |
#endif // DEBUG |
245 |
#if POSIX |
#if POSIX |
246 |
if (pFile->hFileRead == 0) return stream_closed; |
if (pFile->hFileRead == 0) return stream_closed; |
247 |
|
#elif defined (WIN32) |
248 |
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if (pFile->hFileRead == INVALID_HANDLE_VALUE) |
249 |
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return stream_closed; |
250 |
#else |
#else |
251 |
if (pFile->hFileRead == NULL) return stream_closed; |
if (pFile->hFileRead == NULL) return stream_closed; |
252 |
#endif // POSIX |
#endif // POSIX |
280 |
unsigned long readWords = read(pFile->hFileRead, pData, WordCount * WordSize); |
unsigned long readWords = read(pFile->hFileRead, pData, WordCount * WordSize); |
281 |
if (readWords < 1) return 0; |
if (readWords < 1) return 0; |
282 |
readWords /= WordSize; |
readWords /= WordSize; |
283 |
|
#elif defined(WIN32) |
284 |
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if (SetFilePointer(pFile->hFileRead, ulStartPos + ulPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) return 0; |
285 |
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DWORD readWords; |
286 |
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ReadFile(pFile->hFileRead, pData, WordCount * WordSize, &readWords, NULL); |
287 |
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if (readWords < 1) return 0; |
288 |
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readWords /= WordSize; |
289 |
#else // standard C functions |
#else // standard C functions |
290 |
if (fseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET)) return 0; |
if (fseek(pFile->hFileRead, ulStartPos + ulPos, SEEK_SET)) return 0; |
291 |
unsigned long readWords = fread(pData, WordSize, WordCount, pFile->hFileRead); |
unsigned long readWords = fread(pData, WordSize, WordCount, pFile->hFileRead); |
327 |
* @see Resize() |
* @see Resize() |
328 |
*/ |
*/ |
329 |
unsigned long Chunk::Write(void* pData, unsigned long WordCount, unsigned long WordSize) { |
unsigned long Chunk::Write(void* pData, unsigned long WordCount, unsigned long WordSize) { |
330 |
if (pFile->Mode == stream_mode_read) |
if (pFile->Mode != stream_mode_read_write) |
331 |
throw Exception("Writing chunk data in read-only file access mode was attempted"); |
throw Exception("Cannot write data to chunk, file has to be opened in read+write mode first"); |
332 |
if (ulPos >= CurrentChunkSize || ulPos + WordCount * WordSize >= CurrentChunkSize) |
if (ulPos >= CurrentChunkSize || ulPos + WordCount * WordSize > CurrentChunkSize) |
333 |
throw Exception("End of chunk reached while trying to write data"); |
throw Exception("End of chunk reached while trying to write data"); |
334 |
if (!pFile->bEndianNative && WordSize != 1) { |
if (!pFile->bEndianNative && WordSize != 1) { |
335 |
switch (WordSize) { |
switch (WordSize) { |
355 |
unsigned long writtenWords = write(pFile->hFileWrite, pData, WordCount * WordSize); |
unsigned long writtenWords = write(pFile->hFileWrite, pData, WordCount * WordSize); |
356 |
if (writtenWords < 1) throw Exception("POSIX IO Error while trying to write chunk data"); |
if (writtenWords < 1) throw Exception("POSIX IO Error while trying to write chunk data"); |
357 |
writtenWords /= WordSize; |
writtenWords /= WordSize; |
358 |
|
#elif defined(WIN32) |
359 |
|
if (SetFilePointer(pFile->hFileWrite, ulStartPos + ulPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) { |
360 |
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throw Exception("Could not seek to position " + ToString(ulPos) + |
361 |
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" in chunk (" + ToString(ulStartPos + ulPos) + " in file)"); |
362 |
|
} |
363 |
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DWORD writtenWords; |
364 |
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WriteFile(pFile->hFileWrite, pData, WordCount * WordSize, &writtenWords, NULL); |
365 |
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if (writtenWords < 1) throw Exception("Windows IO Error while trying to write chunk data"); |
366 |
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writtenWords /= WordSize; |
367 |
#else // standard C functions |
#else // standard C functions |
368 |
if (fseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET)) { |
if (fseek(pFile->hFileWrite, ulStartPos + ulPos, SEEK_SET)) { |
369 |
throw Exception("Could not seek to position " + ToString(ulPos) + |
throw Exception("Could not seek to position " + ToString(ulPos) + |
710 |
* |
* |
711 |
* <b>Caution:</b> the buffer pointer will be invalidated once |
* <b>Caution:</b> the buffer pointer will be invalidated once |
712 |
* File::Save() was called. You have to call LoadChunkData() again to |
* File::Save() was called. You have to call LoadChunkData() again to |
713 |
* get a new pointer whenever File::Save() was called. |
* get a new, valid pointer whenever File::Save() was called. |
714 |
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* |
715 |
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* You can call LoadChunkData() again if you previously scheduled to |
716 |
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* enlarge this chunk with a Resize() call. In that case the buffer will |
717 |
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* be enlarged to the new, scheduled chunk size and you can already |
718 |
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* place the new chunk data to the buffer and finally call File::Save() |
719 |
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* to enlarge the chunk physically and write the new data in one rush. |
720 |
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* This approach is definitely recommended if you have to enlarge and |
721 |
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* write new data to a lot of chunks. |
722 |
* |
* |
723 |
* @returns a pointer to the data in RAM on success, NULL otherwise |
* @returns a pointer to the data in RAM on success, NULL otherwise |
724 |
|
* @throws Exception if data buffer could not be enlarged |
725 |
* @see ReleaseChunkData() |
* @see ReleaseChunkData() |
726 |
*/ |
*/ |
727 |
void* Chunk::LoadChunkData() { |
void* Chunk::LoadChunkData() { |
728 |
if (!pChunkData) { |
if (!pChunkData && pFile->Filename != "") { |
729 |
#if POSIX |
#if POSIX |
730 |
if (lseek(pFile->hFileRead, ulStartPos, SEEK_SET) == -1) return NULL; |
if (lseek(pFile->hFileRead, ulStartPos, SEEK_SET) == -1) return NULL; |
731 |
pChunkData = new uint8_t[GetSize()]; |
#elif defined(WIN32) |
732 |
if (!pChunkData) return NULL; |
if (SetFilePointer(pFile->hFileRead, ulStartPos, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER) return NULL; |
|
unsigned long readWords = read(pFile->hFileRead, pChunkData, GetSize()); |
|
733 |
#else |
#else |
734 |
if (fseek(pFile->hFileRead, ulStartPos, SEEK_SET)) return NULL; |
if (fseek(pFile->hFileRead, ulStartPos, SEEK_SET)) return NULL; |
735 |
pChunkData = new uint8_t[GetSize()]; |
#endif // POSIX |
736 |
|
unsigned long ulBufferSize = (CurrentChunkSize > NewChunkSize) ? CurrentChunkSize : NewChunkSize; |
737 |
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pChunkData = new uint8_t[ulBufferSize]; |
738 |
if (!pChunkData) return NULL; |
if (!pChunkData) return NULL; |
739 |
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memset(pChunkData, 0, ulBufferSize); |
740 |
|
#if POSIX |
741 |
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unsigned long readWords = read(pFile->hFileRead, pChunkData, GetSize()); |
742 |
|
#elif defined(WIN32) |
743 |
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DWORD readWords; |
744 |
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ReadFile(pFile->hFileRead, pChunkData, GetSize(), &readWords, NULL); |
745 |
|
#else |
746 |
unsigned long readWords = fread(pChunkData, 1, GetSize(), pFile->hFileRead); |
unsigned long readWords = fread(pChunkData, 1, GetSize(), pFile->hFileRead); |
747 |
#endif // POSIX |
#endif // POSIX |
748 |
if (readWords != GetSize()) { |
if (readWords != GetSize()) { |
749 |
delete[] pChunkData; |
delete[] pChunkData; |
750 |
return (pChunkData = NULL); |
return (pChunkData = NULL); |
751 |
} |
} |
752 |
|
ulChunkDataSize = ulBufferSize; |
753 |
|
} else if (NewChunkSize > ulChunkDataSize) { |
754 |
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uint8_t* pNewBuffer = new uint8_t[NewChunkSize]; |
755 |
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if (!pNewBuffer) throw Exception("Could not enlarge chunk data buffer to " + ToString(NewChunkSize) + " bytes"); |
756 |
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memset(pNewBuffer, 0 , NewChunkSize); |
757 |
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memcpy(pNewBuffer, pChunkData, ulChunkDataSize); |
758 |
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delete[] pChunkData; |
759 |
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pChunkData = pNewBuffer; |
760 |
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ulChunkDataSize = NewChunkSize; |
761 |
} |
} |
762 |
return pChunkData; |
return pChunkData; |
763 |
} |
} |
787 |
* |
* |
788 |
* <b>Caution:</b> You cannot directly write to enlarged chunks before |
* <b>Caution:</b> You cannot directly write to enlarged chunks before |
789 |
* calling File::Save() as this might exceed the current chunk's body |
* calling File::Save() as this might exceed the current chunk's body |
790 |
* boundary. |
* boundary! |
791 |
* |
* |
792 |
* @param iNewSize - new chunk body size in bytes (must be greater than zero) |
* @param iNewSize - new chunk body size in bytes (must be greater than zero) |
793 |
* @throws RIFF::Exception if \a iNewSize is less than 1 |
* @throws RIFF::Exception if \a iNewSize is less than 1 |
794 |
* @see File::Save() |
* @see File::Save() |
795 |
*/ |
*/ |
796 |
void Chunk::Resize(int iNewSize) { |
void Chunk::Resize(int iNewSize) { |
797 |
if (iNewSize <= 0) throw Exception("Chunk size must be at least one byte"); |
if (iNewSize <= 0) |
798 |
|
throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(this)); |
799 |
|
if (NewChunkSize == iNewSize) return; |
800 |
NewChunkSize = iNewSize; |
NewChunkSize = iNewSize; |
801 |
pFile->LogAsResized(this); |
pFile->LogAsResized(this); |
802 |
} |
} |
814 |
* (including its header size of course) |
* (including its header size of course) |
815 |
*/ |
*/ |
816 |
unsigned long Chunk::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) { |
unsigned long Chunk::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) { |
817 |
unsigned long ulOriginalPos = ulWritePos; |
const unsigned long ulOriginalPos = ulWritePos; |
818 |
ulWritePos += CHUNK_HEADER_SIZE; |
ulWritePos += CHUNK_HEADER_SIZE; |
819 |
|
|
820 |
|
if (pFile->Mode != stream_mode_read_write) |
821 |
|
throw Exception("Cannot write list chunk, file has to be opened in read+write mode"); |
822 |
|
|
823 |
// if the whole chunk body was loaded into RAM |
// if the whole chunk body was loaded into RAM |
824 |
if (pChunkData) { |
if (pChunkData) { |
825 |
// in case the chunk size was changed, reallocate the data in RAM with the chunk's new size |
// make sure chunk data buffer in RAM is at least as large as the new chunk size |
826 |
if (NewChunkSize != CurrentChunkSize) { |
LoadChunkData(); |
|
uint8_t* pNewBuffer = new uint8_t[NewChunkSize]; |
|
|
if (NewChunkSize > CurrentChunkSize) { |
|
|
memcpy(pNewBuffer, pChunkData, CurrentChunkSize); |
|
|
memset(pNewBuffer + CurrentChunkSize, 0, NewChunkSize - CurrentChunkSize); |
|
|
} else { |
|
|
memcpy(pNewBuffer, pChunkData, NewChunkSize); |
|
|
} |
|
|
delete[] pChunkData; |
|
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pChunkData = pNewBuffer; |
|
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} |
|
|
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|
827 |
// write chunk data from RAM persistently to the file |
// write chunk data from RAM persistently to the file |
828 |
#if POSIX |
#if POSIX |
829 |
lseek(pFile->hFileWrite, ulWritePos, SEEK_SET); |
lseek(pFile->hFileWrite, ulWritePos, SEEK_SET); |
830 |
if (write(pFile->hFileWrite, pChunkData, NewChunkSize) != NewChunkSize) { |
if (write(pFile->hFileWrite, pChunkData, NewChunkSize) != NewChunkSize) { |
831 |
throw Exception("Writing Chunk data (from RAM) failed"); |
throw Exception("Writing Chunk data (from RAM) failed"); |
832 |
} |
} |
833 |
|
#elif defined(WIN32) |
834 |
|
SetFilePointer(pFile->hFileWrite, ulWritePos, NULL/*32 bit*/, FILE_BEGIN); |
835 |
|
DWORD dwBytesWritten; |
836 |
|
WriteFile(pFile->hFileWrite, pChunkData, NewChunkSize, &dwBytesWritten, NULL); |
837 |
|
if (dwBytesWritten != NewChunkSize) { |
838 |
|
throw Exception("Writing Chunk data (from RAM) failed"); |
839 |
|
} |
840 |
#else |
#else |
841 |
fseek(pFile->hFileWrite, ulWritePos, SEEK_SET); |
fseek(pFile->hFileWrite, ulWritePos, SEEK_SET); |
842 |
if (fwrite(pChunkData, 1, NewChunkSize, pFile->hFileWrite) != NewChunkSize) { |
if (fwrite(pChunkData, 1, NewChunkSize, pFile->hFileWrite) != NewChunkSize) { |
847 |
// move chunk data from the end of the file to the appropriate position |
// move chunk data from the end of the file to the appropriate position |
848 |
int8_t* pCopyBuffer = new int8_t[4096]; |
int8_t* pCopyBuffer = new int8_t[4096]; |
849 |
unsigned long ulToMove = (NewChunkSize < CurrentChunkSize) ? NewChunkSize : CurrentChunkSize; |
unsigned long ulToMove = (NewChunkSize < CurrentChunkSize) ? NewChunkSize : CurrentChunkSize; |
850 |
|
#if defined(WIN32) |
851 |
|
DWORD iBytesMoved = 1; // we have to pass it via pointer to the Windows API, thus the correct size must be ensured |
852 |
|
#else |
853 |
int iBytesMoved = 1; |
int iBytesMoved = 1; |
854 |
|
#endif |
855 |
for (unsigned long ulOffset = 0; iBytesMoved > 0; ulOffset += iBytesMoved, ulToMove -= iBytesMoved) { |
for (unsigned long ulOffset = 0; iBytesMoved > 0; ulOffset += iBytesMoved, ulToMove -= iBytesMoved) { |
856 |
iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096; |
iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096; |
857 |
#if POSIX |
#if POSIX |
859 |
iBytesMoved = read(pFile->hFileRead, pCopyBuffer, iBytesMoved); |
iBytesMoved = read(pFile->hFileRead, pCopyBuffer, iBytesMoved); |
860 |
lseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET); |
lseek(pFile->hFileWrite, ulWritePos + ulOffset, SEEK_SET); |
861 |
iBytesMoved = write(pFile->hFileWrite, pCopyBuffer, iBytesMoved); |
iBytesMoved = write(pFile->hFileWrite, pCopyBuffer, iBytesMoved); |
862 |
|
#elif defined(WIN32) |
863 |
|
SetFilePointer(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, NULL/*32 bit*/, FILE_BEGIN); |
864 |
|
ReadFile(pFile->hFileRead, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL); |
865 |
|
SetFilePointer(pFile->hFileWrite, ulWritePos + ulOffset, NULL/*32 bit*/, FILE_BEGIN); |
866 |
|
WriteFile(pFile->hFileWrite, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL); |
867 |
#else |
#else |
868 |
fseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET); |
fseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET); |
869 |
iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, pFile->hFileRead); |
iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, pFile->hFileRead); |
885 |
|
|
886 |
// add pad byte if needed |
// add pad byte if needed |
887 |
if ((ulStartPos + NewChunkSize) % 2 != 0) { |
if ((ulStartPos + NewChunkSize) % 2 != 0) { |
888 |
char cPadByte = 0; |
const char cPadByte = 0; |
889 |
#if POSIX |
#if POSIX |
890 |
|
lseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET); |
891 |
write(pFile->hFileWrite, &cPadByte, 1); |
write(pFile->hFileWrite, &cPadByte, 1); |
892 |
|
#elif defined(WIN32) |
893 |
|
SetFilePointer(pFile->hFileWrite, ulStartPos + NewChunkSize, NULL/*32 bit*/, FILE_BEGIN); |
894 |
|
DWORD dwBytesWritten; |
895 |
|
WriteFile(pFile->hFileWrite, &cPadByte, 1, &dwBytesWritten, NULL); |
896 |
#else |
#else |
897 |
|
fseek(pFile->hFileWrite, ulStartPos + NewChunkSize, SEEK_SET); |
898 |
fwrite(&cPadByte, 1, 1, pFile->hFileWrite); |
fwrite(&cPadByte, 1, 1, pFile->hFileWrite); |
899 |
#endif |
#endif |
900 |
return ulStartPos + NewChunkSize + 1; |
return ulStartPos + NewChunkSize + 1; |
1148 |
Chunk* List::AddSubChunk(uint32_t uiChunkID, uint uiBodySize) { |
Chunk* List::AddSubChunk(uint32_t uiChunkID, uint uiBodySize) { |
1149 |
if (uiBodySize == 0) throw Exception("Chunk body size must be at least 1 byte"); |
if (uiBodySize == 0) throw Exception("Chunk body size must be at least 1 byte"); |
1150 |
if (!pSubChunks) LoadSubChunks(); |
if (!pSubChunks) LoadSubChunks(); |
1151 |
Chunk* pNewChunk = new Chunk(pFile, this, uiChunkID, uiBodySize); |
Chunk* pNewChunk = new Chunk(pFile, this, uiChunkID, 0); |
1152 |
pSubChunks->push_back(pNewChunk); |
pSubChunks->push_back(pNewChunk); |
1153 |
(*pSubChunksMap)[uiChunkID] = pNewChunk; |
(*pSubChunksMap)[uiChunkID] = pNewChunk; |
1154 |
pFile->ResizedChunks.push_back(pNewChunk); |
pNewChunk->Resize(uiBodySize); |
1155 |
return pNewChunk; |
return pNewChunk; |
1156 |
} |
} |
1157 |
|
|
1158 |
|
/** @brief Moves a sub chunk. |
1159 |
|
* |
1160 |
|
* Moves a sub chunk from one position in a list to another |
1161 |
|
* position in the same list. The pSrc chunk is placed before the |
1162 |
|
* pDst chunk. |
1163 |
|
* |
1164 |
|
* @param pSrc - sub chunk to be moved |
1165 |
|
* @param pDst - the position to move to. pSrc will be placed |
1166 |
|
* before pDst. If pDst is 0, pSrc will be placed |
1167 |
|
* last in list. |
1168 |
|
*/ |
1169 |
|
void List::MoveSubChunk(Chunk* pSrc, Chunk* pDst) { |
1170 |
|
if (!pSubChunks) LoadSubChunks(); |
1171 |
|
pSubChunks->remove(pSrc); |
1172 |
|
ChunkList::iterator iter = find(pSubChunks->begin(), pSubChunks->end(), pDst); |
1173 |
|
pSubChunks->insert(iter, pSrc); |
1174 |
|
} |
1175 |
|
|
1176 |
/** @brief Creates a new list sub chunk. |
/** @brief Creates a new list sub chunk. |
1177 |
* |
* |
1178 |
* Creates and adds a new list sub chunk to this list chunk. Note that |
* Creates and adds a new list sub chunk to this list chunk. Note that |
1194 |
* |
* |
1195 |
* Removes the sub chunk given by \a pSubChunk from this list and frees |
* Removes the sub chunk given by \a pSubChunk from this list and frees |
1196 |
* it completely from RAM. The given chunk can either be a normal sub |
* it completely from RAM. The given chunk can either be a normal sub |
1197 |
* chunk or a list sub chunk. You should call File::Save() to make this |
* chunk or a list sub chunk. In case the given chunk is a list chunk, |
1198 |
* change persistent at any time. |
* all its subchunks (if any) will be removed recursively as well. You |
1199 |
|
* should call File::Save() to make this change persistent at any time. |
1200 |
* |
* |
1201 |
* @param pSubChunk - sub chunk or sub list chunk to be removed |
* @param pSubChunk - sub chunk or sub list chunk to be removed |
1202 |
*/ |
*/ |
1227 |
#if POSIX |
#if POSIX |
1228 |
lseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
lseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
1229 |
read(pFile->hFileRead, &ListType, 4); |
read(pFile->hFileRead, &ListType, 4); |
1230 |
|
#elif defined(WIN32) |
1231 |
|
SetFilePointer(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, NULL/*32 bit*/, FILE_BEGIN); |
1232 |
|
DWORD dwBytesRead; |
1233 |
|
ReadFile(pFile->hFileRead, &ListType, 4, &dwBytesRead, NULL); |
1234 |
#else |
#else |
1235 |
fseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
fseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
1236 |
fread(&ListType, 4, 1, pFile->hFileRead); |
fread(&ListType, 4, 1, pFile->hFileRead); |
1251 |
#if POSIX |
#if POSIX |
1252 |
lseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
lseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
1253 |
write(pFile->hFileWrite, &ListType, 4); |
write(pFile->hFileWrite, &ListType, 4); |
1254 |
|
#elif defined(WIN32) |
1255 |
|
SetFilePointer(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, NULL/*32 bit*/, FILE_BEGIN); |
1256 |
|
DWORD dwBytesWritten; |
1257 |
|
WriteFile(pFile->hFileWrite, &ListType, 4, &dwBytesWritten, NULL); |
1258 |
#else |
#else |
1259 |
fseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
fseek(pFile->hFileWrite, fPos + CHUNK_HEADER_SIZE, SEEK_SET); |
1260 |
fwrite(&ListType, 4, 1, pFile->hFileWrite); |
fwrite(&ListType, 4, 1, pFile->hFileWrite); |
1268 |
if (!pSubChunks) { |
if (!pSubChunks) { |
1269 |
pSubChunks = new ChunkList(); |
pSubChunks = new ChunkList(); |
1270 |
pSubChunksMap = new ChunkMap(); |
pSubChunksMap = new ChunkMap(); |
1271 |
|
#if defined(WIN32) |
1272 |
|
if (pFile->hFileRead == INVALID_HANDLE_VALUE) return; |
1273 |
|
#else |
1274 |
if (!pFile->hFileRead) return; |
if (!pFile->hFileRead) return; |
1275 |
|
#endif |
1276 |
unsigned long uiOriginalPos = GetPos(); |
unsigned long uiOriginalPos = GetPos(); |
1277 |
SetPos(0); // jump to beginning of list chunk body |
SetPos(0); // jump to beginning of list chunk body |
1278 |
while (RemainingBytes() >= CHUNK_HEADER_SIZE) { |
while (RemainingBytes() >= CHUNK_HEADER_SIZE) { |
1298 |
} |
} |
1299 |
} |
} |
1300 |
|
|
1301 |
|
void List::LoadSubChunksRecursively() { |
1302 |
|
for (List* pList = GetFirstSubList(); pList; pList = GetNextSubList()) |
1303 |
|
pList->LoadSubChunksRecursively(); |
1304 |
|
} |
1305 |
|
|
1306 |
/** @brief Write list chunk persistently e.g. to disk. |
/** @brief Write list chunk persistently e.g. to disk. |
1307 |
* |
* |
1308 |
* Stores the list chunk persistently to its actual "physical" file. All |
* Stores the list chunk persistently to its actual "physical" file. All |
1318 |
* (including its header size of course) |
* (including its header size of course) |
1319 |
*/ |
*/ |
1320 |
unsigned long List::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) { |
unsigned long List::WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset) { |
1321 |
unsigned long ulOriginalPos = ulWritePos; |
const unsigned long ulOriginalPos = ulWritePos; |
1322 |
ulWritePos += LIST_HEADER_SIZE; |
ulWritePos += LIST_HEADER_SIZE; |
1323 |
|
|
1324 |
|
if (pFile->Mode != stream_mode_read_write) |
1325 |
|
throw Exception("Cannot write list chunk, file has to be opened in read+write mode"); |
1326 |
|
|
1327 |
// write all subchunks (including sub list chunks) recursively |
// write all subchunks (including sub list chunks) recursively |
1328 |
if (pSubChunks) { |
if (pSubChunks) { |
1329 |
for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) { |
for (ChunkList::iterator iter = pSubChunks->begin(), end = pSubChunks->end(); iter != end; ++iter) { |
1335 |
CurrentChunkSize = NewChunkSize = ulWritePos - ulOriginalPos - LIST_HEADER_SIZE; |
CurrentChunkSize = NewChunkSize = ulWritePos - ulOriginalPos - LIST_HEADER_SIZE; |
1336 |
WriteHeader(ulOriginalPos); |
WriteHeader(ulOriginalPos); |
1337 |
|
|
1338 |
|
// offset of this list chunk in new written file may have changed |
1339 |
|
ulStartPos = ulOriginalPos + LIST_HEADER_SIZE; |
1340 |
|
|
1341 |
return ulWritePos; |
return ulWritePos; |
1342 |
} |
} |
1343 |
|
|
1368 |
* "from scratch". Note: there must be no empty chunks or empty list |
* "from scratch". Note: there must be no empty chunks or empty list |
1369 |
* chunks when trying to make the new RIFF file persistent with Save()! |
* chunks when trying to make the new RIFF file persistent with Save()! |
1370 |
* |
* |
1371 |
* @see AddSubChunk(), AddSubList() |
* Note: by default, the RIFF file will be saved in native endian |
1372 |
*/ |
* format; that is, as a RIFF file on little-endian machines and |
1373 |
File::File() : List(this) { |
* as a RIFX file on big-endian. To change this behaviour, call |
1374 |
|
* SetByteOrder() before calling Save(). |
1375 |
|
* |
1376 |
|
* @param FileType - four-byte identifier of the RIFF file type |
1377 |
|
* @see AddSubChunk(), AddSubList(), SetByteOrder() |
1378 |
|
*/ |
1379 |
|
File::File(uint32_t FileType) : List(this) { |
1380 |
|
#if defined(WIN32) |
1381 |
|
hFileRead = hFileWrite = INVALID_HANDLE_VALUE; |
1382 |
|
#else |
1383 |
hFileRead = hFileWrite = 0; |
hFileRead = hFileWrite = 0; |
1384 |
|
#endif |
1385 |
|
Mode = stream_mode_closed; |
1386 |
bEndianNative = true; |
bEndianNative = true; |
1387 |
ulStartPos = RIFF_HEADER_SIZE; |
ulStartPos = RIFF_HEADER_SIZE; |
1388 |
|
ListType = FileType; |
1389 |
} |
} |
1390 |
|
|
1391 |
/** @brief Load existing RIFF file. |
/** @brief Load existing RIFF file. |
1407 |
hFileRead = hFileWrite = 0; |
hFileRead = hFileWrite = 0; |
1408 |
throw RIFF::Exception("Can't open \"" + path + "\""); |
throw RIFF::Exception("Can't open \"" + path + "\""); |
1409 |
} |
} |
1410 |
|
#elif defined(WIN32) |
1411 |
|
hFileRead = hFileWrite = CreateFile( |
1412 |
|
path.c_str(), GENERIC_READ, |
1413 |
|
FILE_SHARE_READ | FILE_SHARE_WRITE, |
1414 |
|
NULL, OPEN_EXISTING, |
1415 |
|
FILE_ATTRIBUTE_NORMAL, NULL |
1416 |
|
); |
1417 |
|
if (hFileRead == INVALID_HANDLE_VALUE) { |
1418 |
|
hFileRead = hFileWrite = INVALID_HANDLE_VALUE; |
1419 |
|
throw RIFF::Exception("Can't open \"" + path + "\""); |
1420 |
|
} |
1421 |
#else |
#else |
1422 |
hFileRead = hFileWrite = fopen(path.c_str(), "rb"); |
hFileRead = hFileWrite = fopen(path.c_str(), "rb"); |
1423 |
if (!hFile) throw RIFF::Exception("Can't open \"" + path + "\""); |
if (!hFileRead) throw RIFF::Exception("Can't open \"" + path + "\""); |
1424 |
#endif // POSIX |
#endif // POSIX |
1425 |
|
Mode = stream_mode_read; |
1426 |
ulStartPos = RIFF_HEADER_SIZE; |
ulStartPos = RIFF_HEADER_SIZE; |
1427 |
ReadHeader(0); |
ReadHeader(0); |
1428 |
if (ChunkID != CHUNK_ID_RIFF) { |
if (ChunkID != CHUNK_ID_RIFF) { |
1459 |
hFileRead = hFileWrite = 0; |
hFileRead = hFileWrite = 0; |
1460 |
throw Exception("Could not (re)open file \"" + Filename + "\" in read mode"); |
throw Exception("Could not (re)open file \"" + Filename + "\" in read mode"); |
1461 |
} |
} |
1462 |
|
#elif defined(WIN32) |
1463 |
|
if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead); |
1464 |
|
hFileRead = hFileWrite = CreateFile( |
1465 |
|
Filename.c_str(), GENERIC_READ, |
1466 |
|
FILE_SHARE_READ | FILE_SHARE_WRITE, |
1467 |
|
NULL, OPEN_EXISTING, |
1468 |
|
FILE_ATTRIBUTE_NORMAL, NULL |
1469 |
|
); |
1470 |
|
if (hFileRead == INVALID_HANDLE_VALUE) { |
1471 |
|
hFileRead = hFileWrite = INVALID_HANDLE_VALUE; |
1472 |
|
throw Exception("Could not (re)open file \"" + Filename + "\" in read mode"); |
1473 |
|
} |
1474 |
#else |
#else |
1475 |
if (hFileRead) fclose(hFileRead); |
if (hFileRead) fclose(hFileRead); |
1476 |
hFileRead = hFileWrite = fopen(path.c_str(), "rb"); |
hFileRead = hFileWrite = fopen(Filename.c_str(), "rb"); |
1477 |
if (!hFileRead) throw Exception("Could not (re)open file \"" + Filename + "\" in read mode"); |
if (!hFileRead) throw Exception("Could not (re)open file \"" + Filename + "\" in read mode"); |
1478 |
#endif |
#endif |
1479 |
__resetPos(); // reset read/write position of ALL 'Chunk' objects |
__resetPos(); // reset read/write position of ALL 'Chunk' objects |
1480 |
return true; |
break; |
1481 |
case stream_mode_read_write: |
case stream_mode_read_write: |
1482 |
#if POSIX |
#if POSIX |
1483 |
if (hFileRead) close(hFileRead); |
if (hFileRead) close(hFileRead); |
1486 |
hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK); |
hFileRead = hFileWrite = open(Filename.c_str(), O_RDONLY | O_NONBLOCK); |
1487 |
throw Exception("Could not open file \"" + Filename + "\" in read+write mode"); |
throw Exception("Could not open file \"" + Filename + "\" in read+write mode"); |
1488 |
} |
} |
1489 |
|
#elif defined(WIN32) |
1490 |
|
if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead); |
1491 |
|
hFileRead = hFileWrite = CreateFile( |
1492 |
|
Filename.c_str(), |
1493 |
|
GENERIC_READ | GENERIC_WRITE, |
1494 |
|
FILE_SHARE_READ, |
1495 |
|
NULL, OPEN_ALWAYS, |
1496 |
|
FILE_ATTRIBUTE_NORMAL, NULL |
1497 |
|
); |
1498 |
|
if (hFileRead == INVALID_HANDLE_VALUE) { |
1499 |
|
hFileRead = hFileWrite = CreateFile( |
1500 |
|
Filename.c_str(), GENERIC_READ, |
1501 |
|
FILE_SHARE_READ | FILE_SHARE_WRITE, |
1502 |
|
NULL, OPEN_EXISTING, |
1503 |
|
FILE_ATTRIBUTE_NORMAL, NULL |
1504 |
|
); |
1505 |
|
throw Exception("Could not (re)open file \"" + Filename + "\" in read+write mode"); |
1506 |
|
} |
1507 |
#else |
#else |
1508 |
if (hFileRead) fclose(hFileRead); |
if (hFileRead) fclose(hFileRead); |
1509 |
hFileRead = hFileWrite = fopen(path.c_str(), "r+b"); |
hFileRead = hFileWrite = fopen(Filename.c_str(), "r+b"); |
1510 |
if (!hFileRead) { |
if (!hFileRead) { |
1511 |
hFileRead = hFileWrite = fopen(path.c_str(), "rb"); |
hFileRead = hFileWrite = fopen(Filename.c_str(), "rb"); |
1512 |
throw Exception("Could not open file \"" + Filename + "\" in read+write mode"); |
throw Exception("Could not open file \"" + Filename + "\" in read+write mode"); |
1513 |
} |
} |
1514 |
#endif |
#endif |
1515 |
__resetPos(); // reset read/write position of ALL 'Chunk' objects |
__resetPos(); // reset read/write position of ALL 'Chunk' objects |
1516 |
return true; |
break; |
1517 |
|
case stream_mode_closed: |
1518 |
|
#if POSIX |
1519 |
|
if (hFileRead) close(hFileRead); |
1520 |
|
if (hFileWrite) close(hFileWrite); |
1521 |
|
#elif defined(WIN32) |
1522 |
|
if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead); |
1523 |
|
if (hFileWrite != INVALID_HANDLE_VALUE) CloseHandle(hFileWrite); |
1524 |
|
#else |
1525 |
|
if (hFileRead) fclose(hFileRead); |
1526 |
|
if (hFileWrite) fclose(hFileWrite); |
1527 |
|
#endif |
1528 |
|
hFileRead = hFileWrite = 0; |
1529 |
|
break; |
1530 |
default: |
default: |
1531 |
throw Exception("Unknown file access mode"); |
throw Exception("Unknown file access mode"); |
1532 |
} |
} |
1533 |
|
Mode = NewMode; |
1534 |
|
return true; |
1535 |
} |
} |
1536 |
return false; |
return false; |
1537 |
} |
} |
1538 |
|
|
1539 |
|
/** @brief Set the byte order to be used when saving. |
1540 |
|
* |
1541 |
|
* Set the byte order to be used in the file. A value of |
1542 |
|
* endian_little will create a RIFF file, endian_big a RIFX file |
1543 |
|
* and endian_native will create a RIFF file on little-endian |
1544 |
|
* machines and RIFX on big-endian machines. |
1545 |
|
* |
1546 |
|
* @param Endian - endianess to use when file is saved. |
1547 |
|
*/ |
1548 |
|
void File::SetByteOrder(endian_t Endian) { |
1549 |
|
#if WORDS_BIGENDIAN |
1550 |
|
bEndianNative = Endian != endian_little; |
1551 |
|
#else |
1552 |
|
bEndianNative = Endian != endian_big; |
1553 |
|
#endif |
1554 |
|
} |
1555 |
|
|
1556 |
/** @brief Save changes to same file. |
/** @brief Save changes to same file. |
1557 |
* |
* |
1558 |
* Make all changes of all chunks persistent by writing them to the |
* Make all changes of all chunks persistent by writing them to the |
1564 |
* chunk or any kind of IO error occured |
* chunk or any kind of IO error occured |
1565 |
*/ |
*/ |
1566 |
void File::Save() { |
void File::Save() { |
1567 |
|
// make sure the RIFF tree is built (from the original file) |
1568 |
|
LoadSubChunksRecursively(); |
1569 |
|
|
1570 |
// reopen file in write mode |
// reopen file in write mode |
1571 |
bool bModeWasChanged = SetMode(stream_mode_read_write); |
SetMode(stream_mode_read_write); |
1572 |
|
|
1573 |
// to be able to save the whole file without loading everything into |
// to be able to save the whole file without loading everything into |
1574 |
// RAM and without having to store the data in a temporary file, we |
// RAM and without having to store the data in a temporary file, we |
1580 |
// first we sum up all positive chunk size changes (and skip all negative ones) |
// first we sum up all positive chunk size changes (and skip all negative ones) |
1581 |
unsigned long ulPositiveSizeDiff = 0; |
unsigned long ulPositiveSizeDiff = 0; |
1582 |
for (ChunkList::iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) { |
for (ChunkList::iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) { |
1583 |
if ((*iter)->GetNewSize() == 0) throw Exception("There is at least one empty chunk (zero size)"); |
if ((*iter)->GetNewSize() == 0) { |
1584 |
unsigned long ulDiff = (*iter)->GetNewSize() - (*iter)->GetSize() + 1L; // +1 in case we have to add a pad byte |
throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(*iter)); |
1585 |
if (ulDiff > 0) ulPositiveSizeDiff += ulDiff; |
} |
1586 |
|
if ((*iter)->GetNewSize() + 1L > (*iter)->GetSize()) { |
1587 |
|
unsigned long ulDiff = (*iter)->GetNewSize() - (*iter)->GetSize() + 1L; // +1 in case we have to add a pad byte |
1588 |
|
ulPositiveSizeDiff += ulDiff; |
1589 |
|
} |
1590 |
} |
} |
1591 |
|
|
1592 |
unsigned long ulWorkingFileSize = GetFileSize(); |
unsigned long ulWorkingFileSize = GetFileSize(); |
1599 |
// ... and move current data by the same amount towards end of file. |
// ... and move current data by the same amount towards end of file. |
1600 |
int8_t* pCopyBuffer = new int8_t[4096]; |
int8_t* pCopyBuffer = new int8_t[4096]; |
1601 |
const unsigned long ulFileSize = GetSize() + RIFF_HEADER_SIZE; |
const unsigned long ulFileSize = GetSize() + RIFF_HEADER_SIZE; |
1602 |
int iBytesMoved = 1; |
#if defined(WIN32) |
1603 |
|
DWORD iBytesMoved = 1; // we have to pass it via pointer to the Windows API, thus the correct size must be ensured |
1604 |
|
#else |
1605 |
|
int iBytesMoved = 1; |
1606 |
|
#endif |
1607 |
for (unsigned long ulPos = 0; iBytesMoved > 0; ulPos += iBytesMoved) { |
for (unsigned long ulPos = 0; iBytesMoved > 0; ulPos += iBytesMoved) { |
1608 |
const unsigned long ulToMove = ulFileSize - ulPos; |
const unsigned long ulToMove = ulFileSize - ulPos; |
1609 |
iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096; |
iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096; |
1612 |
iBytesMoved = read(hFileRead, pCopyBuffer, iBytesMoved); |
iBytesMoved = read(hFileRead, pCopyBuffer, iBytesMoved); |
1613 |
lseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET); |
lseek(hFileWrite, ulPos + ulPositiveSizeDiff, SEEK_SET); |
1614 |
iBytesMoved = write(hFileWrite, pCopyBuffer, iBytesMoved); |
iBytesMoved = write(hFileWrite, pCopyBuffer, iBytesMoved); |
1615 |
|
#elif defined(WIN32) |
1616 |
|
SetFilePointer(hFileRead, ulPos, NULL/*32 bit*/, FILE_BEGIN); |
1617 |
|
ReadFile(hFileRead, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL); |
1618 |
|
SetFilePointer(hFileWrite, ulPos + ulPositiveSizeDiff, NULL/*32 bit*/, FILE_BEGIN); |
1619 |
|
WriteFile(hFileWrite, pCopyBuffer, iBytesMoved, &iBytesMoved, NULL); |
1620 |
#else |
#else |
1621 |
fseek(hFileRead, ulPos, SEEK_SET); |
fseek(hFileRead, ulPos, SEEK_SET); |
1622 |
iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, hFileRead); |
iBytesMoved = fread(pCopyBuffer, 1, iBytesMoved, hFileRead); |
1629 |
} |
} |
1630 |
|
|
1631 |
// rebuild / rewrite complete RIFF tree |
// rebuild / rewrite complete RIFF tree |
1632 |
unsigned long ulTotalSize = WriteChunk(0, ulPositiveSizeDiff); |
unsigned long ulTotalSize = WriteChunk(0, ulPositiveSizeDiff); |
1633 |
|
unsigned long ulActualSize = __GetFileSize(hFileWrite); |
1634 |
|
|
1635 |
// resize file to the final size |
// resize file to the final size |
1636 |
if (ulTotalSize < ulWorkingFileSize) ResizeFile(ulTotalSize); |
if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize); |
1637 |
|
|
1638 |
// forget all resized chunks |
// forget all resized chunks |
1639 |
ResizedChunks.clear(); |
ResizedChunks.clear(); |
|
|
|
|
// reopen file in read mode |
|
|
if (bModeWasChanged) SetMode(stream_mode_read); |
|
1640 |
} |
} |
1641 |
|
|
1642 |
/** @brief Save changes to another file. |
/** @brief Save changes to another file. |
1644 |
* Make all changes of all chunks persistent by writing them to another |
* Make all changes of all chunks persistent by writing them to another |
1645 |
* file. <b>Caution:</b> this method is optimized for writing to |
* file. <b>Caution:</b> this method is optimized for writing to |
1646 |
* <b>another</b> file, do not use it to save the changes to the same |
* <b>another</b> file, do not use it to save the changes to the same |
1647 |
* file! Use File::Save() in that case instead! |
* file! Use File::Save() in that case instead! Ignoring this might |
1648 |
|
* result in a corrupted file, especially in case chunks were resized! |
1649 |
* |
* |
1650 |
* After calling this method, this File object will be associated with |
* After calling this method, this File object will be associated with |
1651 |
* the new file (given by \a path) afterwards. |
* the new file (given by \a path) afterwards. |
1653 |
* @param path - path and file name where everything should be written to |
* @param path - path and file name where everything should be written to |
1654 |
*/ |
*/ |
1655 |
void File::Save(const String& path) { |
void File::Save(const String& path) { |
1656 |
|
//TODO: we should make a check here if somebody tries to write to the same file and automatically call the other Save() method in that case |
1657 |
|
|
1658 |
|
// make sure the RIFF tree is built (from the original file) |
1659 |
|
LoadSubChunksRecursively(); |
1660 |
|
|
1661 |
|
if (Filename.length() > 0) SetMode(stream_mode_read); |
1662 |
// open the other (new) file for writing and truncate it to zero size |
// open the other (new) file for writing and truncate it to zero size |
1663 |
#if POSIX |
#if POSIX |
1664 |
hFileWrite = open(path.c_str(), O_RDWR | O_CREAT | O_TRUNC); |
hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP); |
1665 |
if (hFileWrite < 0) { |
if (hFileWrite < 0) { |
1666 |
hFileWrite = hFileRead; |
hFileWrite = hFileRead; |
1667 |
throw Exception("Could not open file \"" + path + "\" for writing"); |
throw Exception("Could not open file \"" + path + "\" for writing"); |
1668 |
} |
} |
1669 |
|
#elif defined(WIN32) |
1670 |
|
hFileWrite = CreateFile( |
1671 |
|
path.c_str(), GENERIC_WRITE, FILE_SHARE_READ, |
1672 |
|
NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL |
1673 |
|
); |
1674 |
|
if (hFileWrite == INVALID_HANDLE_VALUE) { |
1675 |
|
hFileWrite = hFileRead; |
1676 |
|
throw Exception("Could not open file \"" + path + "\" for writing"); |
1677 |
|
} |
1678 |
#else |
#else |
1679 |
hFileWrite = fopen(path.c_str(), "w+b"); |
hFileWrite = fopen(path.c_str(), "w+b"); |
1680 |
if (!hFileWrite) { |
if (!hFileWrite) { |
1682 |
throw Exception("Could not open file \"" + path + "\" for writing"); |
throw Exception("Could not open file \"" + path + "\" for writing"); |
1683 |
} |
} |
1684 |
#endif // POSIX |
#endif // POSIX |
1685 |
|
Mode = stream_mode_read_write; |
1686 |
|
|
1687 |
// write complete RIFF tree to the other (new) file |
// write complete RIFF tree to the other (new) file |
1688 |
WriteChunk(0, 0); |
unsigned long ulTotalSize = WriteChunk(0, 0); |
1689 |
|
unsigned long ulActualSize = __GetFileSize(hFileWrite); |
1690 |
|
|
1691 |
|
// resize file to the final size (if the file was originally larger) |
1692 |
|
if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize); |
1693 |
|
|
1694 |
// forget all resized chunks |
// forget all resized chunks |
1695 |
ResizedChunks.clear(); |
ResizedChunks.clear(); |
1696 |
|
|
1697 |
|
#if POSIX |
1698 |
|
if (hFileWrite) close(hFileWrite); |
1699 |
|
#elif defined(WIN32) |
1700 |
|
if (hFileWrite != INVALID_HANDLE_VALUE) CloseHandle(hFileWrite); |
1701 |
|
#else |
1702 |
|
if (hFileWrite) fclose(hFileWrite); |
1703 |
|
#endif |
1704 |
|
hFileWrite = hFileRead; |
1705 |
|
|
1706 |
// associate new file with this File object from now on |
// associate new file with this File object from now on |
1707 |
Filename = path; |
Filename = path; |
1708 |
stream_mode_t oldMode = Mode; |
Mode = (stream_mode_t) -1; // Just set it to an undefined mode ... |
1709 |
Mode = (stream_mode_t) -1; // Just set it to an undefined mode ... |
SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles. |
|
SetMode(oldMode); // ... so SetMode() has to reopen the file handles. |
|
1710 |
} |
} |
1711 |
|
|
1712 |
void File::ResizeFile(unsigned long ulNewSize) { |
void File::ResizeFile(unsigned long ulNewSize) { |
1713 |
#if POSIX |
#if POSIX |
1714 |
if (ftruncate(hFileWrite, ulNewSize) < 0) |
if (ftruncate(hFileWrite, ulNewSize) < 0) |
1715 |
throw Exception("Could not resize file \"" + Filename + "\""); |
throw Exception("Could not resize file \"" + Filename + "\""); |
1716 |
|
#elif defined(WIN32) |
1717 |
|
if ( |
1718 |
|
SetFilePointer(hFileWrite, ulNewSize, NULL/*32 bit*/, FILE_BEGIN) == INVALID_SET_FILE_POINTER || |
1719 |
|
!SetEndOfFile(hFileWrite) |
1720 |
|
) throw Exception("Could not resize file \"" + Filename + "\""); |
1721 |
#else |
#else |
1722 |
# error Sorry, this version of libgig only supports POSIX systems yet. |
# error Sorry, this version of libgig only supports POSIX and Windows systems yet. |
1723 |
# error Reason: portable implementation of RIFF::File::ResizeFile() is missing! |
# error Reason: portable implementation of RIFF::File::ResizeFile() is missing (yet)! |
1724 |
#endif |
#endif |
1725 |
} |
} |
1726 |
|
|
1730 |
#endif // DEBUG |
#endif // DEBUG |
1731 |
#if POSIX |
#if POSIX |
1732 |
if (hFileRead) close(hFileRead); |
if (hFileRead) close(hFileRead); |
1733 |
|
#elif defined(WIN32) |
1734 |
|
if (hFileRead != INVALID_HANDLE_VALUE) CloseHandle(hFileRead); |
1735 |
#else |
#else |
1736 |
if (hFileRead) fclose(hFileRead); |
if (hFileRead) fclose(hFileRead); |
1737 |
#endif // POSIX |
#endif // POSIX |
1741 |
ResizedChunks.push_back(pResizedChunk); |
ResizedChunks.push_back(pResizedChunk); |
1742 |
} |
} |
1743 |
|
|
1744 |
|
void File::UnlogResized(Chunk* pResizedChunk) { |
1745 |
|
ResizedChunks.remove(pResizedChunk); |
1746 |
|
} |
1747 |
|
|
1748 |
unsigned long File::GetFileSize() { |
unsigned long File::GetFileSize() { |
1749 |
#if POSIX |
return __GetFileSize(hFileRead); |
1750 |
|
} |
1751 |
|
|
1752 |
|
#if POSIX |
1753 |
|
unsigned long File::__GetFileSize(int hFile) { |
1754 |
struct stat filestat; |
struct stat filestat; |
1755 |
fstat(hFileRead, &filestat); |
fstat(hFile, &filestat); |
1756 |
long size = filestat.st_size; |
long size = filestat.st_size; |
|
#else // standard C functions |
|
|
long curpos = ftell(hFileRead); |
|
|
fseek(hFileRead, 0, SEEK_END); |
|
|
long size = ftell(hFileRead); |
|
|
fseek(hFileRead, curpos, SEEK_SET); |
|
|
#endif // POSIX |
|
1757 |
return size; |
return size; |
1758 |
} |
} |
1759 |
|
#elif defined(WIN32) |
1760 |
|
unsigned long File::__GetFileSize(HANDLE hFile) { |
1761 |
|
DWORD dwSize = ::GetFileSize(hFile, NULL /*32bit*/); |
1762 |
|
if (dwSize == INVALID_FILE_SIZE) |
1763 |
|
throw Exception("Windows FS error: could not determine file size"); |
1764 |
|
return dwSize; |
1765 |
|
} |
1766 |
|
#else // standard C functions |
1767 |
|
unsigned long File::__GetFileSize(FILE* hFile) { |
1768 |
|
long curpos = ftell(hFile); |
1769 |
|
fseek(hFile, 0, SEEK_END); |
1770 |
|
long size = ftell(hFile); |
1771 |
|
fseek(hFile, curpos, SEEK_SET); |
1772 |
|
return size; |
1773 |
|
} |
1774 |
|
#endif |
1775 |
|
|
1776 |
|
|
1777 |
// *************** Exception *************** |
// *************** Exception *************** |