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Lots of stuff
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elasota
207
PortabilityLayer/FileManager.cpp
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207
PortabilityLayer/FileManager.cpp
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#include "FileManager.h"
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#include "HostFileSystem.h"
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#include "HostMemoryBuffer.h"
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#include "MemReaderStream.h"
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#include "MacBinary2.h"
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#include "MacFileMem.h"
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#include "PLPasStr.h"
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#include "PLErrorCodes.h"
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#include <vector>
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namespace PortabilityLayer
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{
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class VirtualFile;
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class FileManagerImpl final : public FileManager
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{
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public:
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bool FileExists(uint32_t dirID, const PLPasStr &filename) override;
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int OpenFileDF(uint32_t dirID, const PLPasStr &filename, EFilePermission filePermission, short *outRefNum) override;
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int OpenFileRF(uint32_t dirID, const PLPasStr &filename, EFilePermission filePermission, short *outRefNum) override;
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int RawOpenFileDF(uint32_t dirID, const PLPasStr &filename, EFilePermission filePermission, bool ignoreMeta, IOStream **outStream) override;
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int RawOpenFileRF(uint32_t dirID, const PLPasStr &filename, EFilePermission filePermission, bool ignoreMeta, IOStream **outStream) override;
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static FileManagerImpl *GetInstance();
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private:
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typedef char ExtendedFileName_t[64 + 4];
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struct OpenedFile
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{
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EVirtualDirectory m_dirID;
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PascalStr<64> m_fileName;
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IOStream *m_stream;
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};
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int OpenFileFork(uint32_t dirID, const PLPasStr &filename, const char *ext, EFilePermission permission, short *outRefNum);
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int RawOpenFileFork(uint32_t dirID, const PLPasStr &filename, const char *ext, EFilePermission permission, bool ignoreMeta, IOStream **outStream);
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static bool ConstructFilename(ExtendedFileName_t& extFN, const PLPasStr &fn, const char *extension);
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std::vector<OpenedFile> m_refs;
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static FileManagerImpl ms_instance;
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};
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bool FileManagerImpl::FileExists(uint32_t dirID, const PLPasStr &filename)
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{
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ExtendedFileName_t extFN;
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if (!ConstructFilename(extFN, filename, ".gpf"))
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return false;
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return HostFileSystem::GetInstance()->FileExists(static_cast<EVirtualDirectory>(dirID), extFN);
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}
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int FileManagerImpl::OpenFileDF(uint32_t dirID, const PLPasStr &filename, EFilePermission permission, short *outRefNum)
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{
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return OpenFileFork(dirID, filename, ".gpd", permission, outRefNum);
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}
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int FileManagerImpl::OpenFileRF(uint32_t dirID, const PLPasStr &filename, EFilePermission permission, short *outRefNum)
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{
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return OpenFileFork(dirID, filename, ".gpr", permission, outRefNum);
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}
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int FileManagerImpl::RawOpenFileDF(uint32_t dirID, const PLPasStr &filename, EFilePermission permission, bool ignoreMeta, IOStream **outStream)
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{
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return RawOpenFileFork(dirID, filename, ".gpd", permission, ignoreMeta, outStream);
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}
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int FileManagerImpl::RawOpenFileRF(uint32_t dirID, const PLPasStr &filename, EFilePermission permission, bool ignoreMeta, IOStream **outStream)
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{
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return RawOpenFileFork(dirID, filename, ".gpr", permission, ignoreMeta, outStream);
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}
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FileManagerImpl *FileManagerImpl::GetInstance()
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{
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return &ms_instance;
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}
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int FileManagerImpl::OpenFileFork(uint32_t dirID, const PLPasStr &filename, const char *extension, EFilePermission permission, short *outRefNum)
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{
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const size_t numRefs = m_refs.size();
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size_t refIndex = m_refs.size();
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for (size_t i = 0; i < numRefs; i++)
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{
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if (m_refs[i].m_stream == nullptr)
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{
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refIndex = i;
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break;
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}
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}
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if (refIndex == 0x7fff)
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return tmfoErr;
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IOStream *stream = nullptr;
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int openError = RawOpenFileFork(dirID, filename, extension, permission, false, &stream);
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if (openError != 0)
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return openError;
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if (refIndex == numRefs)
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m_refs.push_back(OpenedFile());
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OpenedFile &of = m_refs[refIndex];
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of.m_stream = stream;
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of.m_dirID = static_cast<EVirtualDirectory>(dirID);
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of.m_fileName.Set(filename.Length(), filename.Chars());
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*outRefNum = static_cast<short>(refIndex + 1);
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return noErr;
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}
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int FileManagerImpl::RawOpenFileFork(uint32_t dirID, const PLPasStr &filename, const char *ext, EFilePermission permission, bool ignoreMeta, IOStream **outStream)
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{
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ExtendedFileName_t gpfExtFN;
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ExtendedFileName_t extFN;
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if (filename.Length() > 63)
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return bdNamErr;
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if (!ignoreMeta)
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{
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if (!ConstructFilename(gpfExtFN, filename, ".gpf"))
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return bdNamErr;
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if (!HostFileSystem::GetInstance()->FileExists(static_cast<EVirtualDirectory>(dirID), gpfExtFN))
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return fnfErr;
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}
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const bool needToCreate = !(ignoreMeta || HostFileSystem::GetInstance()->FileExists(static_cast<EVirtualDirectory>(dirID), extFN));
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if (!ConstructFilename(extFN, filename, ext))
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return bdNamErr;
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IOStream *fstream = nullptr;
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switch (permission)
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{
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case EFilePermission_Any:
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fstream = HostFileSystem::GetInstance()->OpenFile(static_cast<EVirtualDirectory>(dirID), extFN, true, needToCreate);
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if (fstream)
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permission = EFilePermission_ReadWrite;
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else
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{
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permission = EFilePermission_Read;
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fstream = HostFileSystem::GetInstance()->OpenFile(static_cast<EVirtualDirectory>(dirID), extFN, false, needToCreate);
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}
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break;
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case EFilePermission_Read:
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fstream = HostFileSystem::GetInstance()->OpenFile(static_cast<EVirtualDirectory>(dirID), extFN, false, needToCreate);
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break;
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case EFilePermission_ReadWrite:
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fstream = HostFileSystem::GetInstance()->OpenFile(static_cast<EVirtualDirectory>(dirID), extFN, true, needToCreate);
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break;
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}
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if (!fstream)
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return permErr;
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*outStream = fstream;
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return noErr;
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}
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bool FileManagerImpl::ConstructFilename(ExtendedFileName_t& extFN, const PLPasStr &fn, const char *extension)
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{
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const size_t fnameSize = fn.Length();
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if (fnameSize >= 64)
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return false;
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memcpy(extFN, fn.Chars(), fnameSize);
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memcpy(extFN + fnameSize, extension, strlen(extension) + 1);
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for (size_t i = 0; i < fnameSize; i++)
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{
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const char c = extFN[i];
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if (c >= '0' && c <= '9')
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continue;
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if (c == '_')
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continue;
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if (c == ' ' && i != 0 && i != fnameSize - 1)
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continue;
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if (c >= 'a' && c <= 'z')
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continue;
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if (c >= 'A' && c <= 'Z')
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continue;
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return false;
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}
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return true;
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}
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FileManagerImpl FileManagerImpl::ms_instance;
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FileManager *FileManager::GetInstance()
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{
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return FileManagerImpl::GetInstance();
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}
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}
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