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/*
* tclFileSystem.h --
*
* This file contains the common defintions and prototypes for use by
* Tcl's filesystem and path handling layers.
*
* Copyright (c) 2003 Vince Darley.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#ifndef _TCLFILESYSTEM
#define _TCLFILESYSTEM
#include "tcl.h"
/*
* struct FilesystemRecord --
*
* A filesystem record is used to keep track of each filesystem currently
* registered with the core, in a linked list. Pointers to these structures
* are also kept by each "path" Tcl_Obj, and we must retain a refCount on the
* number of such references.
*/
typedef struct FilesystemRecord {
ClientData clientData; /* Client specific data for the new filesystem
* (can be NULL) */
Tcl_Filesystem *fsPtr; /* Pointer to filesystem dispatch table. */
int fileRefCount; /* How many Tcl_Obj's use this filesystem. */
struct FilesystemRecord *nextPtr;
/* The next filesystem registered to Tcl, or
* NULL if no more. */
struct FilesystemRecord *prevPtr;
/* The previous filesystem registered to Tcl,
* or NULL if no more. */
} FilesystemRecord;
/*
* This structure holds per-thread private copy of the current directory
* maintained by the global cwdPathPtr. This structure holds per-thread
* private copies of some global data. This way we avoid most of the
* synchronization calls which boosts performance, at cost of having to update
* this information each time the corresponding epoch counter changes.
*/
typedef struct ThreadSpecificData {
int initialized;
int cwdPathEpoch;
int filesystemEpoch;
Tcl_Obj *cwdPathPtr;
ClientData cwdClientData;
FilesystemRecord *filesystemList;
int claims;
} ThreadSpecificData;
/*
* The internal TclFS API provides routines for handling and manipulating
* paths efficiently, taking direct advantage of the "path" Tcl_Obj type.
*
* These functions are not exported at all at present.
*/
MODULE_SCOPE int TclFSCwdPointerEquals(Tcl_Obj **pathPtrPtr);
MODULE_SCOPE int TclFSMakePathFromNormalized(Tcl_Interp *interp,
Tcl_Obj *pathPtr, ClientData clientData);
MODULE_SCOPE int TclFSNormalizeToUniquePath(Tcl_Interp *interp,
Tcl_Obj *pathPtr, int startAt,
ClientData *clientDataPtr);
MODULE_SCOPE Tcl_Obj * TclFSMakePathRelative(Tcl_Interp *interp,
Tcl_Obj *pathPtr, Tcl_Obj *cwdPtr);
MODULE_SCOPE Tcl_Obj * TclFSInternalToNormalized(
Tcl_Filesystem *fromFilesystem,
ClientData clientData,
FilesystemRecord **fsRecPtrPtr);
MODULE_SCOPE int TclFSEnsureEpochOk(Tcl_Obj *pathPtr,
Tcl_Filesystem **fsPtrPtr);
MODULE_SCOPE void TclFSSetPathDetails(Tcl_Obj *pathPtr,
FilesystemRecord *fsRecPtr,
ClientData clientData);
MODULE_SCOPE Tcl_Obj * TclFSNormalizeAbsolutePath(Tcl_Interp *interp,
Tcl_Obj *pathPtr, ClientData *clientDataPtr);
/*
* Private shared variables for use by tclIOUtil.c and tclPathObj.c
*/
MODULE_SCOPE Tcl_Filesystem tclNativeFilesystem;
MODULE_SCOPE Tcl_ThreadDataKey tclFsDataKey;
/*
* Private shared functions for use by tclIOUtil.c, tclPathObj.c and
* tclFileName.c, and any platform-specific filesystem code.
*/
MODULE_SCOPE Tcl_PathType TclFSGetPathType(Tcl_Obj *pathPtr,
Tcl_Filesystem **filesystemPtrPtr,
int *driveNameLengthPtr);
MODULE_SCOPE Tcl_PathType TclFSNonnativePathType(CONST char *pathPtr,
int pathLen, Tcl_Filesystem **filesystemPtrPtr,
int *driveNameLengthPtr, Tcl_Obj **driveNameRef);
MODULE_SCOPE Tcl_PathType TclGetPathType(Tcl_Obj *pathPtr,
Tcl_Filesystem **filesystemPtrPtr,
int *driveNameLengthPtr, Tcl_Obj **driveNameRef);
MODULE_SCOPE int TclFSEpochOk(int filesystemEpoch);
MODULE_SCOPE int TclFSCwdIsNative(void);
MODULE_SCOPE Tcl_Obj * TclWinVolumeRelativeNormalize(Tcl_Interp *interp,
CONST char *path, Tcl_Obj **useThisCwdPtr);
MODULE_SCOPE Tcl_FSPathInFilesystemProc TclNativePathInFilesystem;
MODULE_SCOPE Tcl_FSCreateInternalRepProc TclNativeCreateNativeRep;
#endif /* _TCLFILESYSTEM */
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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