Mcucpp

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#include <filesystem/findnodelister.h>
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namespace Mcucpp
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{
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namespace Fs
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{
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	FindNodeLister::FindNodeLister(IFsDriver &driver)
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		:_filePath(nullptr),
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		_driver(driver),
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		_found(false),
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		_pathMatched(false),
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		_foundEntry(nullptr)
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	{
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	}
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	bool FindNodeLister::Find(const uint8_t *filePath, FileSystemEntry *foundEntry)
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	{
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		if(foundEntry == nullptr || filePath == nullptr)
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		{
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			return false;
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		}
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		_filePath = filePath;
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		_currentNode = _driver.RootDirectory();
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		_found = false;
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		_pathMatched = false;
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		_foundEntry = foundEntry;
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		do
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		{
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			if(!_driver.ListDirectory(_currentNode, *this))
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			{
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				return false;
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			}
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			if(!_pathMatched)
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			{
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				return false;
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			}
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		}while(!_found);
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		return true;
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	}
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	bool FindNodeLister::DirectoryEntry(const FileSystemEntry &entry)
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	{
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		if(PathElementMatch(entry.Name()))
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		{
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			_currentNode = entry.Node();
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			_pathMatched = true;
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			*_foundEntry = entry;
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			return false;
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		}
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		else
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		{
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			_pathMatched = false;
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		}
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		return true;
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	}
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	bool FindNodeLister::PathElementMatch(const uint8_t *name)
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	{
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		const uint8_t *pathPtr = _filePath;
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		while(*pathPtr == PathDelim)
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		{
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			pathPtr++;
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		}
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		do
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		{
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			if(*pathPtr == PathDelim)
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			{
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				_filePath = pathPtr;
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				return true;
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			}
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			if(*pathPtr == 0)
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			{
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				_found = true;
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				return true;
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			}
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		}while(*pathPtr++ == *name++);
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		return false;
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	}
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}}