//----------------------------------------------------------------------------
//
int
TextureMemoryLayout::getBlockOffset(int bufferWidth, int posX, int posY, int pixMode)
{
int horizPages, vertPages;
int numPages = 0;
int blockNumber = 0;
PixelType pType = modeToPixelType(pixMode);
const PixelFormatLayout &pf = pixelFormat[pType];
// First figure out how many pages are above
vertPages = posY / pf.pageSize.height;
if (vertPages) {
horizPages = bufferWidth / pf.pageSize.width;
posY -= vertPages * pf.pageSize.height;
numPages += vertPages * horizPages;
}
// Now how many are to the left
horizPages = posX / pf.pageSize.width;
if (horizPages) {
posX -= horizPages * pf.pageSize.width;
numPages += horizPages;
}
// Now figure out where we are within the page
int horizBlocks, vertBlocks;
horizBlocks = posX / pf.blockSize.width;
vertBlocks = posY / pf.blockSize.height;
blockNumber = getBlockNumber(horizBlocks, vertBlocks, pixMode);
return (numPages * 32) + blockNumber;
}
/**
* Allocates a free physical page of memory.
* This is chosen using a round robin algorithm, to even out the wear on the physical device.
* @return NULL on error, page address on success
*/
uint32_t* MicroBitFileSystem::getFreePage()
{
// Walk the file table, starting at the last allocated block, looking for an unused page.
int blocksPerPage = (PAGE_SIZE / MBFS_BLOCK_SIZE);
// get a handle on the next physical page.
uint16_t currentPage = getBlockNumber(getPage(lastBlockAllocated));
uint16_t page = (currentPage + blocksPerPage) % fileSystemSize;
uint16_t recyclablePage = 0;
// Walk around the file table, looking for a free page.
while (page != currentPage)
{
bool empty = true;
bool deleted = false;
uint16_t next;
for (int i = 0; i < blocksPerPage; i++)
{
next = getNextFileBlock(page + i);
if (next == MBFS_DELETED)
deleted = true;
else if (next != MBFS_UNUSED)
{
empty = false;
break;
}
}
// See if we found one...
if (empty)
{
lastBlockAllocated = page;
return getBlock(page);
}
// make note of the first unused but un-erased page we find (if any).
if (deleted && !recyclablePage)
recyclablePage = page;
page = (page + blocksPerPage) % fileSystemSize;
}
// No empty pages are available, but we may be able to recycle one.
if (recyclablePage)
{
uint32_t *address = getBlock(recyclablePage);
flash.erase_page(address);
return address;
}
// Nothing available at all. Use the default.
flash.erase_page(defaultScratchPage);
return defaultScratchPage;
}
void EtherIPC::connectedToServer() {
done();
getClientVersion();
getBlockNumber(); // initial
fTimer.start(); // should happen after filter creation, might need to move into last filter response handler
EtherLog::logMsg("Connected to IPC socket");
emit connectToServerDone();
emit connectionStateChanged();
}
/**
* Gets a random map block from a given terrain, using either the groups or the blocks defined.
* @param terrain the terrain to pick a block from.
* @return Pointer to a randomly chosen map block, given the options available.
*/
MapBlock *MapScript::getNextBlock(RuleTerrain *terrain)
{
if (_blocks.empty())
{
return terrain->getRandomMapBlock(_sizeX * 10, _sizeY * 10, getGroupNumber());
}
int result = getBlockNumber();
if (result < (int)(terrain->getMapBlocks()->size()) && result != MT_UNDEFINED)
{
return terrain->getMapBlocks()->at((size_t)(result));
}
return 0;
}
void EtherIPC::onTimer() {
getPeerCount();
getSyncing();
if ( !fBlockFilterID.isEmpty() && !fSyncing ) {
getFilterChanges(fBlockFilterID);
} else {
getBlockNumber();
}
if ( !fEventFilterID.isEmpty() ) {
getFilterChanges(fEventFilterID);
}
}
void EtherIPC::connectedToServer() {
done();
getClientVersion();
getBlockNumber(); // initial
newBlockFilter();
getNetVersion();
if ( fStarting == 1 ) {
fExternal = true;
emit externalChanged(true);
fGethLog.append("Attached to external geth, see logs in terminal window.");
}
fStarting = 3;
EtherLog::logMsg("Connected to IPC socket");
}
void writeINODEData(INODE * inodeP, char c, unsigned int offset)
{
if(offset > inodeP->length){
while(inodeP->length < offset){
writeINODEData(inodeP, '\0');
}
writeINODEData(inodeP, c, offset);
}
else{
int blockNumber = getBlockNumber(inodeP, offset);
if(blockNumber == NULL){
return ;
}
BLOCK * blockP = getBlock(blockNumber);
char * mem = (char *)Malloc(superBlockPointer->blockSize);
readBlock(blockP, mem);
mem[offset % superBlockPointer->blockSize] = c;
writeBlock(blockP, mem);
free(mem);
freeBlock(blockP);
}
}
Symmetrizer::QuantumNumbers StatesClassification::getQuantumNumbers(FockState in) const
{
return BlockToQuantum.find(getBlockNumber(in))->second;
}
const FockState StatesClassification::getFockState( QuantumNumbers in, InnerQuantumState m) const
{
if ( Status < Computed ) { ERROR("StatesClassification is not computed yet."); throw (exStatusMismatch()); };
return getFockState(getBlockNumber(in),m);
}
bool ossimOpenJpegNitfReader::uncompressJpegBlock(ossim_uint32 x,
ossim_uint32 y)
{
ossim_uint32 blockNumber = getBlockNumber(ossimIpt(x,y));
if (traceDebug())
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< "ossimNitfTileSource::uncompressJpegBlock DEBUG:"
<< "\nblockNumber: " << blockNumber
<< "\noffset to block: " << theNitfBlockOffset[blockNumber]
<< "\nblock size: " << theNitfBlockSize[blockNumber]
<< std::endl;
}
// Seek to the block.
theFileStr.seekg(theNitfBlockOffset[blockNumber], ios::beg);
//---
// Get a buffer to read the compressed block into. If all the blocks are
// the same size this will be theCompressedBuf; else we will make our own.
//---
ossim_uint8* compressedBuf = &theCompressedBuf.front();
if (!compressedBuf)
{
compressedBuf = new ossim_uint8[theNitfBlockSize[blockNumber]];
}
// Read the block into memory. We could store this
if (!theFileStr.read((char*)compressedBuf, theNitfBlockSize[blockNumber]))
{
theFileStr.clear();
ossimNotify(ossimNotifyLevel_FATAL)
<< "ossimNitfTileSource::loadBlock Read Error!"
<< "\nReturning error..." << endl;
theErrorStatus = ossimErrorCodes::OSSIM_ERROR;
delete [] compressedBuf;
compressedBuf = 0;
return false;
}
ossimOpenJpegDecoder decoder;
try
{
//theCacheTile = decoder.decodeBuffer(compressedBuf,
// theNitfBlockSize[blockNumber]);
}
catch (const ossimException& e)
{
ossimNotify(ossimNotifyLevel_FATAL)
<< e.what() << std::endl;
theErrorStatus = ossimErrorCodes::OSSIM_ERROR;
}
// If theCompressedBuf is null that means we allocated the compressedBuf.
if (theCompressedBuf.size() == 0)
{
delete [] compressedBuf;
compressedBuf = 0;
}
if (theErrorStatus == ossimErrorCodes::OSSIM_ERROR)
{
return false;
}
return true;
}
/**
* Allocate a free DiretoryEntry in the given directory, extending and refreshing the directory block if necessary.
*
* @param directory The directory to add a DirectoryEntry to
* @return A pointer to the new DirectoryEntry for the given file, or NULL if it was not possible to allocated resources.
*/
DirectoryEntry* MicroBitFileSystem::createDirectoryEntry(DirectoryEntry *directory)
{
Directory *dir;
uint16_t block;
DirectoryEntry *dirent;
DirectoryEntry *empty = NULL;
DirectoryEntry *invalid = NULL;
// Try to find an unused entry in the directory.
block = directory->first_block;
dir = (Directory *)getBlock(block);
dirent = &dir->entry[0];
// Iterate through the directory entries until we find and unused entry, or run out of space.
while (1)
{
// Scan through each of the blocks in the directory
if ((uint32_t)(dirent+1) > (uint32_t)dir + MBFS_BLOCK_SIZE)
{
block = getNextFileBlock(block);
if (block == MBFS_EOF)
break;
dir = (Directory *)getBlock(block);
dirent = &dir->entry[0];
}
// If we find an empty slot, use that.
if (dirent->flags & MBFS_DIRECTORY_ENTRY_FREE)
{
empty = dirent;
break;
}
// Record the first invalid block we find (used, but then deleted).
if ((dirent->flags & MBFS_DIRECTORY_ENTRY_VALID) == 0 && invalid == NULL)
invalid = dirent;
// Move onto the next entry.
dirent++;
}
// Now choose the best available slot, giving preference to entries that would avoid a FLASH page erase opreation.
dirent = NULL;
// Ideally, choose an unused entry within an existing block.
if (empty)
{
dirent = empty;
}
// if not possible, try to re-use a second-hand block that has been freed. This will result in an erase operation of the block,
// but will not consume any more resources.
else if (invalid)
{
dirent = invalid;
uint16_t b = getBlockNumber(dirent);
recycleBlock(b, MBFS_BLOCK_TYPE_DIRECTORY);
}
// If nothing is available, extend the directory with a new block.
else
{
// Allocate a new logical block
uint16_t newBlock = getFreeBlock();
if (newBlock == 0)
return NULL;
// Append this to the directory
uint16_t lastBlock = directory->first_block;
while (getNextFileBlock(lastBlock) != MBFS_EOF)
lastBlock = getNextFileBlock(lastBlock);
// Append the block.
fileTableWrite(lastBlock, newBlock);
fileTableWrite(newBlock, MBFS_EOF);
dirent = (DirectoryEntry *)getBlock(newBlock);
}
return dirent;
}
/**
* Refresh the physical page associated with the given block.
* Any logical blocks marked for deletion on that page are recycled.
*
* @param block the block to recycle.
* @param type One of MBFS_BLOCK_TYPE_FILE, MBFS_BLOCK_TYPE_DIRECTORY, MBFS_BLOCK_TYPE_FILETABLE.
* Erases and regenerates the given block, recycling and data marked for deletion.
* @return MICROBIT_OK on success.
*/
int MicroBitFileSystem::recycleBlock(uint16_t block, int type)
{
uint32_t *page = getPage(block);
uint32_t* scratch = getFreePage();
uint8_t *write = (uint8_t *)scratch;
uint16_t b = getBlockNumber(page);
for (int i = 0; i < PAGE_SIZE / MBFS_BLOCK_SIZE; i++)
{
// If we have an unused or deleted block, there's nothing to do - allow the block to be recycled.
if (fileSystemTable[b] == MBFS_DELETED || fileSystemTable[b] == MBFS_UNUSED)
{}
// If we have been asked to recycle a valid directory block, recycle individual entries where possible.
else if (b == block && type == MBFS_BLOCK_TYPE_DIRECTORY)
{
DirectoryEntry *direntIn = (DirectoryEntry *)getBlock(b);
DirectoryEntry *direntOut = (DirectoryEntry *)write;
for (uint16_t entry = 0; entry < MBFS_BLOCK_SIZE / sizeof(DirectoryEntry); entry++)
{
if (direntIn->flags & MBFS_DIRECTORY_ENTRY_VALID)
flash.flash_write((uint32_t *)direntOut, (uint32_t *)direntIn, sizeof(DirectoryEntry));
direntIn++;
direntOut++;
}
}
// All blocks before the root directory are the FileTable.
// Recycle any entries marked as DELETED to UNUSED.
else if (getBlock(b) < (uint32_t *)rootDirectory)
{
uint16_t *tableIn = (uint16_t *)getBlock(b);
uint16_t *tableOut = (uint16_t *)write;
for (int entry = 0; entry < MBFS_BLOCK_SIZE / 2; entry++)
{
if (*tableIn != MBFS_DELETED)
flash.flash_write(tableOut, tableIn, 2);
tableIn++;
tableOut++;
}
}
// Copy all other VALID blocks directly into the scratch page.
else
flash.flash_write(write, getBlock(b), MBFS_BLOCK_SIZE);
// move on to next block.
write += MBFS_BLOCK_SIZE;
b++;
}
// Now refresh the page originally holding the block.
flash.erase_page(page);
flash.flash_write(page, scratch, PAGE_SIZE);
return MICROBIT_OK;
}
