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Diffstat (limited to 'db/mork/src/morkFile.h')
| -rw-r--r-- | db/mork/src/morkFile.h | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/db/mork/src/morkFile.h b/db/mork/src/morkFile.h new file mode 100644 index 000000000..39242ce73 --- /dev/null +++ b/db/mork/src/morkFile.h @@ -0,0 +1,355 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is mozilla.org code. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either of the GNU General Public License Version 2 or later (the "GPL"), + * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +#ifndef _MORKFILE_ +#define _MORKFILE_ 1 + +#ifndef _MORK_ +#include "mork.h" +#endif + +#ifndef _MORKNODE_ +#include "morkNode.h" +#endif + +#ifndef _MORKOBJECT_ +#include "morkObject.h" +#endif + +//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789 + +/*============================================================================= + * morkFile: abstract file interface + */ + +#define morkDerived_kFile /*i*/ 0x4669 /* ascii 'Fi' */ + +class morkFile /*d*/ : public morkObject, public nsIMdbFile { /* ````` simple file API ````` */ + +// public: // slots inherited from morkNode (meant to inform only) + // nsIMdbHeap* mNode_Heap; + + // mork_base mNode_Base; // must equal morkBase_kNode + // mork_derived mNode_Derived; // depends on specific node subclass + + // mork_access mNode_Access; // kOpen, kClosing, kShut, or kDead + // mork_usage mNode_Usage; // kHeap, kStack, kMember, kGlobal, kNone + // mork_able mNode_Mutable; // can this node be modified? + // mork_load mNode_Load; // is this node clean or dirty? + + // mork_uses mNode_Uses; // refcount for strong refs + // mork_refs mNode_Refs; // refcount for strong refs + weak refs + +// public: // slots inherited from morkObject (meant to inform only) + + // mork_color mBead_Color; // ID for this bead + // morkHandle* mObject_Handle; // weak ref to handle for this object + +// ````` ````` ````` ````` ````` ````` ````` ````` +protected: // protected morkFile members (similar to public domain IronDoc) + virtual ~morkFile(); // assert that CloseFile() executed earlier + + mork_u1 mFile_Frozen; // 'F' => file allows only read access + mork_u1 mFile_DoTrace; // 'T' trace if ev->DoTrace() + mork_u1 mFile_IoOpen; // 'O' => io stream is open (& needs a close) + mork_u1 mFile_Active; // 'A' => file is active and usable + + nsIMdbHeap* mFile_SlotHeap; // heap for Name and other allocated slots + char* mFile_Name; // can be nil if SetFileName() is never called + // mFile_Name convention: managed with morkEnv::CopyString()/FreeString() + + nsIMdbFile* mFile_Thief; // from a call to orkinFile::Steal() + +// { ===== begin morkNode interface ===== +public: // morkNode virtual methods + NS_DECL_ISUPPORTS_INHERITED + virtual void CloseMorkNode(morkEnv* ev) override; // CloseFile() only if open + +public: // morkFile construction & destruction + morkFile(morkEnv* ev, const morkUsage& inUsage, nsIMdbHeap* ioHeap, + nsIMdbHeap* ioSlotHeap); + void CloseFile(morkEnv* ev); // called by CloseMorkNode(); + +private: // copying is not allowed + morkFile(const morkFile& other); + morkFile& operator=(const morkFile& other); + +public: // dynamic type identification + mork_bool IsFile() const + { return IsNode() && mNode_Derived == morkDerived_kFile; } +// } ===== end morkNode methods ===== + +// ````` ````` ````` ````` ````` ````` ````` ````` +public: // public static standard file creation entry point + + static morkFile* OpenOldFile(morkEnv* ev, nsIMdbHeap* ioHeap, + const char* inFilePath, mork_bool inFrozen); + // Choose some subclass of morkFile to instantiate, in order to read + // (and write if not frozen) the file known by inFilePath. The file + // returned should be open and ready for use, and presumably positioned + // at the first byte position of the file. The exact manner in which + // files must be opened is considered a subclass specific detail, and + // other portions or Mork source code don't want to know how it's done. + + static morkFile* CreateNewFile(morkEnv* ev, nsIMdbHeap* ioHeap, + const char* inFilePath); + // Choose some subclass of morkFile to instantiate, in order to read + // (and write if not frozen) the file known by inFilePath. The file + // returned should be created and ready for use, and presumably positioned + // at the first byte position of the file. The exact manner in which + // files must be opened is considered a subclass specific detail, and + // other portions or Mork source code don't want to know how it's done. + +public: // non-poly morkFile methods + + mork_bool FileFrozen() const { return mFile_Frozen == 'F'; } + mork_bool FileDoTrace() const { return mFile_DoTrace == 'T'; } + mork_bool FileIoOpen() const { return mFile_IoOpen == 'O'; } + mork_bool FileActive() const { return mFile_Active == 'A'; } + + void SetFileFrozen(mork_bool b) { mFile_Frozen = (mork_u1) ((b)? 'F' : 0); } + void SetFileDoTrace(mork_bool b) { mFile_DoTrace = (mork_u1) ((b)? 'T' : 0); } + void SetFileIoOpen(mork_bool b) { mFile_IoOpen = (mork_u1) ((b)? 'O' : 0); } + void SetFileActive(mork_bool b) { mFile_Active = (mork_u1) ((b)? 'A' : 0); } + + + mork_bool IsOpenActiveAndMutableFile() const + { return ( IsOpenNode() && FileActive() && !FileFrozen() ); } + // call IsOpenActiveAndMutableFile() before writing a file + + mork_bool IsOpenAndActiveFile() const + { return ( this->IsOpenNode() && this->FileActive() ); } + // call IsOpenAndActiveFile() before using a file + + + nsIMdbFile* GetThief() const { return mFile_Thief; } + void SetThief(morkEnv* ev, nsIMdbFile* ioThief); // ioThief can be nil + + const char* GetFileNameString() const { return mFile_Name; } + void SetFileName(morkEnv* ev, const char* inName); // inName can be nil + static void NilSlotHeapError(morkEnv* ev); + static void NilFileNameError(morkEnv* ev); + static void NonFileTypeError(morkEnv* ev); + + void NewMissingIoError(morkEnv* ev) const; + + void NewFileDownError(morkEnv* ev) const; + // call NewFileDownError() when either IsOpenAndActiveFile() + // is false, or when IsOpenActiveAndMutableFile() is false. + + void NewFileErrnoError(morkEnv* ev) const; + // call NewFileErrnoError() to convert std C errno into AB fault + + mork_size WriteNewlines(morkEnv* ev, mork_count inNewlines); + // WriteNewlines() returns the number of bytes written. + +public: // typesafe refcounting inlines calling inherited morkNode methods + static void SlotWeakFile(morkFile* me, + morkEnv* ev, morkFile** ioSlot) + { morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); } + + static void SlotStrongFile(morkFile* me, + morkEnv* ev, morkFile** ioSlot) + { morkNode::SlotStrongNode((morkNode*) me, ev, (morkNode**) ioSlot); } +public: + virtual mork_pos Length(morkEnv* ev) const = 0; // eof + // nsIMdbFile methods + NS_IMETHOD Tell(nsIMdbEnv* ev, mdb_pos* outPos) const override = 0; + NS_IMETHOD Seek(nsIMdbEnv* ev, mdb_pos inPos, mdb_pos *outPos) override = 0; + NS_IMETHOD Eof(nsIMdbEnv* ev, mdb_pos* outPos) override; + // } ----- end pos methods ----- + + // { ----- begin read methods ----- + NS_IMETHOD Read(nsIMdbEnv* ev, void* outBuf, mdb_size inSize, + mdb_size* outActualSize) override = 0; + NS_IMETHOD Get(nsIMdbEnv* ev, void* outBuf, mdb_size inSize, + mdb_pos inPos, mdb_size* outActualSize) override; + // } ----- end read methods ----- + + // { ----- begin write methods ----- + NS_IMETHOD Write(nsIMdbEnv* ev, const void* inBuf, mdb_size inSize, + mdb_size* outActualSize) override = 0; + NS_IMETHOD Put(nsIMdbEnv* ev, const void* inBuf, mdb_size inSize, + mdb_pos inPos, mdb_size* outActualSize) override; + NS_IMETHOD Flush(nsIMdbEnv* ev) override = 0; + // } ----- end attribute methods ----- + + // { ----- begin path methods ----- + NS_IMETHOD Path(nsIMdbEnv* ev, mdbYarn* outFilePath) override ; + // } ----- end path methods ----- + + // { ----- begin replacement methods ----- + NS_IMETHOD Steal(nsIMdbEnv* ev, nsIMdbFile* ioThief) override = 0; + NS_IMETHOD Thief(nsIMdbEnv* ev, nsIMdbFile** acqThief) override; + // } ----- end replacement methods ----- + + // { ----- begin versioning methods ----- + NS_IMETHOD BecomeTrunk(nsIMdbEnv* ev) override = 0; + + NS_IMETHOD AcquireBud(nsIMdbEnv* ev, nsIMdbHeap* ioHeap, + nsIMdbFile** acqBud) override = 0; + // } ----- end versioning methods ----- + +// } ===== end nsIMdbFile methods ===== + +}; + +/*============================================================================= + * morkStdioFile: concrete file using standard C file io + */ + +#define morkDerived_kStdioFile /*i*/ 0x7346 /* ascii 'sF' */ + +class morkStdioFile /*d*/ : public morkFile { /* `` copied from IronDoc `` */ + +// ````` ````` ````` ````` ````` ````` ````` ````` +protected: // protected morkStdioFile members + + void* mStdioFile_File; + // actually type FILE*, but using opaque void* type + +// { ===== begin morkNode interface ===== +public: // morkNode virtual methods + virtual void CloseMorkNode(morkEnv* ev) override; // CloseStdioFile() only if open + virtual ~morkStdioFile(); // assert that CloseStdioFile() executed earlier + +public: // morkStdioFile construction & destruction + morkStdioFile(morkEnv* ev, const morkUsage& inUsage, + nsIMdbHeap* ioHeap, nsIMdbHeap* ioSlotHeap); + void CloseStdioFile(morkEnv* ev); // called by CloseMorkNode(); + +private: // copying is not allowed + morkStdioFile(const morkStdioFile& other); + morkStdioFile& operator=(const morkStdioFile& other); + +public: // dynamic type identification + mork_bool IsStdioFile() const + { return IsNode() && mNode_Derived == morkDerived_kStdioFile; } +// } ===== end morkNode methods ===== + +public: // typing + static void NonStdioFileTypeError(morkEnv* ev); + +// ````` ````` ````` ````` ````` ````` ````` ````` +public: // compatible with the morkFile::OpenOldFile() entry point + + static morkStdioFile* OpenOldStdioFile(morkEnv* ev, nsIMdbHeap* ioHeap, + const char* inFilePath, mork_bool inFrozen); + + static morkStdioFile* CreateNewStdioFile(morkEnv* ev, nsIMdbHeap* ioHeap, + const char* inFilePath); + + virtual mork_pos Length(morkEnv* ev) const override; // eof + + NS_IMETHOD Tell(nsIMdbEnv* ev, mdb_pos* outPos) const override; + NS_IMETHOD Seek(nsIMdbEnv* ev, mdb_pos inPos, mdb_pos *outPos) override; +// NS_IMETHOD Eof(nsIMdbEnv* ev, mdb_pos* outPos); + // } ----- end pos methods ----- + + // { ----- begin read methods ----- + NS_IMETHOD Read(nsIMdbEnv* ev, void* outBuf, mdb_size inSize, + mdb_size* outActualSize) override; + + // { ----- begin write methods ----- + NS_IMETHOD Write(nsIMdbEnv* ev, const void* inBuf, mdb_size inSize, + mdb_size* outActualSize) override; +// NS_IMETHOD Put(nsIMdbEnv* ev, const void* inBuf, mdb_size inSize, +// mdb_pos inPos, mdb_size* outActualSize); + NS_IMETHOD Flush(nsIMdbEnv* ev) override; + // } ----- end attribute methods ----- + + NS_IMETHOD Steal(nsIMdbEnv* ev, nsIMdbFile* ioThief) override; + + // { ----- begin versioning methods ----- + NS_IMETHOD BecomeTrunk(nsIMdbEnv* ev) override; + + NS_IMETHOD AcquireBud(nsIMdbEnv* ev, nsIMdbHeap* ioHeap, + nsIMdbFile** acqBud) override; + // } ----- end versioning methods ----- + +// } ===== end nsIMdbFile methods ===== + +// ````` ````` ````` ````` ````` ````` ````` ````` + +// ````` ````` ````` ````` ````` ````` ````` ````` +protected: // protected non-poly morkStdioFile methods + + void new_stdio_file_fault(morkEnv* ev) const; + +// ````` ````` ````` ````` ````` ````` ````` ````` +public: // public non-poly morkStdioFile methods + + morkStdioFile(morkEnv* ev, const morkUsage& inUsage, + nsIMdbHeap* ioHeap, nsIMdbHeap* ioSlotHeap, + const char* inName, const char* inMode); + // calls OpenStdio() after construction + + morkStdioFile(morkEnv* ev, const morkUsage& inUsage, + nsIMdbHeap* ioHeap, nsIMdbHeap* ioSlotHeap, + void* ioFile, const char* inName, mork_bool inFrozen); + // calls UseStdio() after construction + + void OpenStdio(morkEnv* ev, const char* inName, const char* inMode); + // Open a new FILE with name inName, using mode flags from inMode. + + void UseStdio(morkEnv* ev, void* ioFile, const char* inName, + mork_bool inFrozen); + // Use an existing file, like stdin/stdout/stderr, which should not + // have the io stream closed when the file is closed. The ioFile + // parameter must actually be of type FILE (but we don't want to make + // this header file include the stdio.h header file). + + void CloseStdio(morkEnv* ev); + // Close the stream io if both and FileActive() and FileIoOpen(), but + // this does not close this instances (like CloseStdioFile() does). + // If stream io was made active by means of calling UseStdio(), + // then this method does little beyond marking the stream inactive + // because FileIoOpen() is false. + +public: // typesafe refcounting inlines calling inherited morkNode methods + static void SlotWeakStdioFile(morkStdioFile* me, + morkEnv* ev, morkStdioFile** ioSlot) + { morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); } + + static void SlotStrongStdioFile(morkStdioFile* me, + morkEnv* ev, morkStdioFile** ioSlot) + { morkNode::SlotStrongNode((morkNode*) me, ev, (morkNode**) ioSlot); } +}; + +//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789 + +#endif /* _MORKFILE_ */ |