tclwinfcmd.c

这是leon3处理器的交叉编译链

    Tcl_Interp *interp,		/* The interp that has the error */
    Tcl_Obj *fileName)	        /* The name of the file which caused the 
				 * error. */
{
    TclWinConvertError(GetLastError());
    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), 
			   "could not read \"", Tcl_GetString(fileName), 
			   "\": ", Tcl_PosixError(interp), 
			   (char *) NULL);
}

/*
 *----------------------------------------------------------------------
 *
 * GetWinFileAttributes --
 *
 *      Returns a Tcl_Obj containing the value of a file attribute.
 *	This routine gets the -hidden, -readonly or -system attribute.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *	will have ref count 0. If the return value is not TCL_OK,
 *	attributePtrPtr is not touched.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */

static int
GetWinFileAttributes(
    Tcl_Interp *interp,		/* The interp we are using for errors. */
    int objIndex,		/* The index of the attribute. */
    Tcl_Obj *fileName,	        /* The name of the file. */
    Tcl_Obj **attributePtrPtr)	/* A pointer to return the object with. */
{
    DWORD result;
    CONST TCHAR *nativeName;
    int attr;
    
    nativeName = Tcl_FSGetNativePath(fileName);
    result = (*tclWinProcs->getFileAttributesProc)(nativeName);

    if (result == 0xffffffff) {
	StatError(interp, fileName);
	return TCL_ERROR;
    }

    attr = (int)(result & attributeArray[objIndex]);
    if ((objIndex == WIN_HIDDEN_ATTRIBUTE) && (attr != 0)) {
	/* 
	 * It is hidden.  However there is a bug on some Windows
	 * OSes in which root volumes (drives) formatted as NTFS
	 * are declared hidden when they are not (and cannot be).
	 * 
	 * We test for, and fix that case, here.
	 */
	int len;
	char *str = Tcl_GetStringFromObj(fileName,&len);
	if (len < 4) {
	    if (len == 0) {
		/* 
		 * Not sure if this is possible, but we pass it on
		 * anyway 
		 */
	    } else if (len == 1 && (str[0] == '/' || str[0] == '\\')) {
		/* Path is pointing to the root volume */
		attr = 0;
	    } else if ((str[1] == ':') 
		       && (len == 2 || (str[2] == '/' || str[2] == '\\'))) {
		/* Path is of the form 'x:' or 'x:/' or 'x:\' */
		attr = 0;
	    }
	}
    }
    *attributePtrPtr = Tcl_NewBooleanObj(attr);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ConvertFileNameFormat --
 *
 *      Returns a Tcl_Obj containing either the long or short version of the 
 *	file name.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *	will have ref count 0. If the return value is not TCL_OK,
 *	attributePtrPtr is not touched.
 *	
 *	Warning: if you pass this function a drive name like 'c:' it
 *	will actually return the current working directory on that
 *	drive.  To avoid this, make sure the drive name ends in a
 *	slash, like this 'c:/'.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */

static int
ConvertFileNameFormat(
    Tcl_Interp *interp,		/* The interp we are using for errors. */
    int objIndex,		/* The index of the attribute. */
    Tcl_Obj *fileName,   	/* The name of the file. */
    int longShort,		/* 0 to short name, 1 to long name. */
    Tcl_Obj **attributePtrPtr)	/* A pointer to return the object with. */
{
    int pathc, i;
    Tcl_Obj *splitPath;
    int result = TCL_OK;

    splitPath = Tcl_FSSplitPath(fileName, &pathc);

    if (splitPath == NULL || pathc == 0) {
	if (interp != NULL) {
	    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), 
		"could not read \"", Tcl_GetString(fileName),
		"\": no such file or directory", 
		(char *) NULL);
	}
	result = TCL_ERROR;
	goto cleanup;
    }
    
    for (i = 0; i < pathc; i++) {
	Tcl_Obj *elt;
	char *pathv;
	int pathLen;
	Tcl_ListObjIndex(NULL, splitPath, i, &elt);
	
	pathv = Tcl_GetStringFromObj(elt, &pathLen);
	if ((pathv[0] == '/')
		|| ((pathLen == 3) && (pathv[1] == ':'))
		|| (strcmp(pathv, ".") == 0)
		|| (strcmp(pathv, "..") == 0)) {
	    /*
	     * Handle "/", "//machine/export", "c:/", "." or ".." by just
	     * copying the string literally.  Uppercase the drive letter,
	     * just because it looks better under Windows to do so.
	     */

	    simple:
	    /* Here we are modifying the string representation in place */
	    /* I believe this is legal, since this won't affect any 
	     * file representation this thing may have. */
	    pathv[0] = (char) Tcl_UniCharToUpper(UCHAR(pathv[0]));
	} else {
	    Tcl_Obj *tempPath;
	    Tcl_DString ds;
	    Tcl_DString dsTemp;
	    TCHAR *nativeName;
	    char *tempString;
	    int tempLen;
	    WIN32_FIND_DATAT data;
	    HANDLE handle;
	    DWORD attr;

	    tempPath = Tcl_FSJoinPath(splitPath, i+1);
	    Tcl_IncrRefCount(tempPath);
	    /* 
	     * We'd like to call Tcl_FSGetNativePath(tempPath)
	     * but that is likely to lead to infinite loops 
	     */
	    Tcl_DStringInit(&ds);
	    tempString = Tcl_GetStringFromObj(tempPath,&tempLen);
	    nativeName = Tcl_WinUtfToTChar(tempString, tempLen, &ds);
	    Tcl_DecrRefCount(tempPath);
	    handle = (*tclWinProcs->findFirstFileProc)(nativeName, &data);
	    if (handle == INVALID_HANDLE_VALUE) {
		/*
		 * FindFirstFile() doesn't like root directories.  We 
		 * would only get a root directory here if the caller
		 * specified "c:" or "c:." and the current directory on the
		 * drive was the root directory
		 */

		attr = (*tclWinProcs->getFileAttributesProc)(nativeName);
		if ((attr != 0xFFFFFFFF) && (attr & FILE_ATTRIBUTE_DIRECTORY)) {
		    Tcl_DStringFree(&ds);
		    goto simple;
		}
	    }

	    if (handle == INVALID_HANDLE_VALUE) {
		Tcl_DStringFree(&ds);
		if (interp != NULL) {
		    StatError(interp, fileName);
		}
		result = TCL_ERROR;
		goto cleanup;
	    }
	    if (tclWinProcs->useWide) {
		nativeName = (TCHAR *) data.w.cAlternateFileName;
		if (longShort) {
		    if (data.w.cFileName[0] != '\0') {
			nativeName = (TCHAR *) data.w.cFileName;
		    } 
		} else {
		    if (data.w.cAlternateFileName[0] == '\0') {
			nativeName = (TCHAR *) data.w.cFileName;
		    }
		}
	    } else {
		nativeName = (TCHAR *) data.a.cAlternateFileName;
		if (longShort) {
		    if (data.a.cFileName[0] != '\0') {
			nativeName = (TCHAR *) data.a.cFileName;
		    } 
		} else {
		    if (data.a.cAlternateFileName[0] == '\0') {
			nativeName = (TCHAR *) data.a.cFileName;
		    }
		}
	    }

	    /*
	     * Purify reports a extraneous UMR in Tcl_WinTCharToUtf() trying 
	     * to dereference nativeName as a Unicode string.  I have proven 
	     * to myself that purify is wrong by running the following 
	     * example when nativeName == data.w.cAlternateFileName and 
	     * noting that purify doesn't complain about the first line,
	     * but does complain about the second.
	     *
	     *	fprintf(stderr, "%d\n", data.w.cAlternateFileName[0]);
	     *	fprintf(stderr, "%d\n", ((WCHAR *) nativeName)[0]);
	     */

	    Tcl_DStringInit(&dsTemp);
	    Tcl_WinTCharToUtf(nativeName, -1, &dsTemp);
	    /* Deal with issues of tildes being absolute */
	    if (Tcl_DStringValue(&dsTemp)[0] == '~') {
		tempPath = Tcl_NewStringObj("./",2);
		Tcl_AppendToObj(tempPath, Tcl_DStringValue(&dsTemp), 
				Tcl_DStringLength(&dsTemp));
	    } else {
		tempPath = Tcl_NewStringObj(Tcl_DStringValue(&dsTemp), 
					    Tcl_DStringLength(&dsTemp));
	    }
	    Tcl_ListObjReplace(NULL, splitPath, i, 1, 1, &tempPath);
	    Tcl_DStringFree(&ds);
	    Tcl_DStringFree(&dsTemp);
	    FindClose(handle);
	}
    }

    *attributePtrPtr = Tcl_FSJoinPath(splitPath, -1);

cleanup:
    if (splitPath != NULL) {
	Tcl_DecrRefCount(splitPath);
    }
  
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * GetWinFileLongName --
 *
 *      Returns a Tcl_Obj containing the long version of the file
 *	name.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *	will have ref count 0. If the return value is not TCL_OK,
 *	attributePtrPtr is not touched.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */

static int
GetWinFileLongName(
    Tcl_Interp *interp,		/* The interp we are using for errors. */
    int objIndex,		/* The index of the attribute. */
    Tcl_Obj *fileName,  	/* The name of the file. */
    Tcl_Obj **attributePtrPtr)	/* A pointer to return the object with. */
{
    return ConvertFileNameFormat(interp, objIndex, fileName, 1, attributePtrPtr);
}

/*
 *----------------------------------------------------------------------
 *
 * GetWinFileShortName --
 *
 *      Returns a Tcl_Obj containing the short version of the file
 *	name.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *	will have ref count 0. If the return value is not TCL_OK,
 *	attributePtrPtr is not touched.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */

static int
GetWinFileShortName(
    Tcl_Interp *interp,		/* The interp we are using for errors. */
    int objIndex,		/* The index of the attribute. */
    Tcl_Obj *fileName,  	/* The name of the file. */
    Tcl_Obj **attributePtrPtr)	/* A pointer to return the object with. */
{
    return ConvertFileNameFormat(interp, objIndex, fileName, 0, attributePtrPtr);
}

/*
 *----------------------------------------------------------------------
 *
 * SetWinFileAttributes --
 *
 *	Set the file attributes to the value given by attributePtr.
 *	This routine sets the -hidden, -readonly, or -system attributes.
 *
 * Results:
 *      Standard TCL error.
 *
 * Side effects:
 *      The file's attribute is set.
 *
 *----------------------------------------------------------------------
 */

static int
SetWinFileAttributes(
    Tcl_Interp *interp,		/* The interp we are using for errors. */
    int objIndex,		/* The index of the attribute. */
    Tcl_Obj *fileName,  	/* The name of the file. */
    Tcl_Obj *attributePtr)	/* The new value of the attribute. */
{
    DWORD fileAttributes;
    int yesNo;
    int result;
    CONST TCHAR *nativeName;

    nativeName = Tcl_FSGetNativePath(fileName);
    fileAttributes = (*tclWinProcs->getFileAttributesProc)(nativeName);

    if (fileAttributes == 0xffffffff) {
	StatError(interp, fileName);
	return TCL_ERROR;
    }

    result = Tcl_GetBooleanFromObj(interp, attributePtr, &yesNo);
    if (result != TCL_OK) {
	return result;
    }

    if (yesNo) {
	fileAttributes |= (attributeArray[objIndex]);
    } else {
	fileAttributes &= ~(attributeArray[objIndex]);
    }

    if (!(*tclWinProcs->setFileAttributesProc)(nativeName, fileAttributes)) {
	StatError(interp, fileName);
	return TCL_ERROR;
    }

    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * SetWinFileLongName --
 *
 *	The attribute in question is a readonly attribute and cannot
 *	be set.
 *
 * Results:
 *      TCL_ERROR
 *
 * Side effects:
 *      The object result is set to a pertinent error message.
 *
 *----------------------------------------------------------------------
 */

static int
CannotSetAttribute(
    Tcl_Interp *interp,		/* The interp we are using for errors. */
    int objIndex,		/* The index of the attribute. */
    Tcl_Obj *fileName,	        /* The name of the file. */
    Tcl_Obj *attributePtr)	/* The new value of the attribute. */
{
    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), 
	    "cannot set attribute \"", tclpFileAttrStrings[objIndex],
	    "\" for file \"", Tcl_GetString(fileName), 
	    "\": attribute is readonly", 
	    (char *) NULL);
    return TCL_ERROR;
}


/*
 *---------------------------------------------------------------------------
 *
 * TclpObjListVolumes --
 *
 *	Lists the currently mounted volumes
 *
 * Results:
 *	The list of volumes.
 *
 * Side effects:
 *	None
 *
 *---------------------------------------------------------------------------
 */

Tcl_Obj*
TclpObjListVolumes(void)
{
    Tcl_Obj *resultPtr, *elemPtr;
    char buf[40 * 4];		/* There couldn't be more than 30 drives??? */
    int i;
    char *p;

    resultPtr = Tcl_NewObj();

    /*
     * On Win32s:
     * GetLogicalDriveStrings() isn't implemented.
     * GetLogicalDrives() returns incorrect information.
     */

    if (GetLogicalDriveStringsA(sizeof(buf), buf) == 0) {
	/*
	 * GetVolumeInformation() will detects all drives, but causes
	 * chattering on empty floppy drives.  We only do this if 
	 * GetLogicalDriveStrings() didn't work.  It has also been reported
	 * that on some laptops it takes a while for GetVolumeInformation()
	 * to return when pinging an empty floppy drive, another reason to 
	 * try to avoid calling it.
	 */

	buf[1] = ':';
	buf[2] = '/';
	buf[3] = '\0';

	for (i = 0; i < 26; i++) {
	    buf[0] = (char) ('a' + i);
	    if (GetVolumeInformationA(buf, NULL, 0, NULL, NULL, NULL, NULL, 0)  
		    || (GetLastError() == ERROR_NOT_READY)) {
		elemPtr = Tcl_NewStringObj(buf, -1);
		Tcl_ListObjAppendElement(NULL, resultPtr, elemPtr);
	    }
	}
    } else {
	for (p = buf; *p != '\0'; p += 4) {
	    p[2] = '/';
	    elemPtr = Tcl_NewStringObj(p, -1);
	    Tcl_ListObjAppendElement(NULL, resultPtr, elemPtr);
	}
    }
    
    Tcl_IncrRefCount(resultPtr);
    return resultPtr;
}