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/* -*- 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
*
* 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
#include "mozilla/Path.h"
// 456789_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 ````` */
using PathChar = mozilla::filesystem::Path::value_type;
// 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
PathChar* 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 PathChar* 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 PathChar* 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 PathChar* GetFileNameString() const { return mFile_Name; }
void SetFileName(morkEnv* ev, const PathChar* 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 `` */
using PathChar = mozilla::filesystem::Path::value_type;
// ````` ````` ````` ````` ````` ````` ````` `````
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 PathChar* inFilePath,
mork_bool inFrozen);
static morkStdioFile* CreateNewStdioFile(morkEnv* ev, nsIMdbHeap* ioHeap,
const PathChar* 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 PathChar* inName,
const char* inMode);
// calls OpenStdio() after construction
morkStdioFile(morkEnv* ev, const morkUsage& inUsage, nsIMdbHeap* ioHeap,
nsIMdbHeap* ioSlotHeap, void* ioFile, const PathChar* inName,
mork_bool inFrozen);
// calls UseStdio() after construction
void OpenStdio(morkEnv* ev, const PathChar* inName, const char* inMode);
// Open a new FILE with name inName, using mode flags from inMode.
void UseStdio(morkEnv* ev, void* ioFile, const PathChar* 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);
}
};
// 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
#endif /* _MORKFILE_ */