tclwinfcmd.c

linux系统下的音频通信

	/*
	 * Win32s thinks that "" is the same as "." and then reports EISDIR
	 * instead of ENOENT.
	 */

	errno = ENOENT;
    } else if (errno == EACCES) {
        attr = GetFileAttributes(path);
	if (attr != (DWORD) -1) {
	    if (attr & FILE_ATTRIBUTE_DIRECTORY) {
		/*
		 * Windows NT reports removing a directory as EACCES instead
		 * of EISDIR.
		 */

		errno = EISDIR;
	    } else if (attr & FILE_ATTRIBUTE_READONLY) {
		SetFileAttributes(path, attr & ~FILE_ATTRIBUTE_READONLY);
		if (DeleteFile(path) != FALSE) {
		    return TCL_OK;
		}
		TclWinConvertError(GetLastError());
		SetFileAttributes(path, attr);
	    }
	}
    } else if (errno == ENOENT) {
        attr = GetFileAttributes(path);
	if (attr != (DWORD) -1) {
	    if (attr & FILE_ATTRIBUTE_DIRECTORY) {
	    	/*
		 * Windows 95 reports removing a directory as ENOENT instead 
		 * of EISDIR. 
		 */

		errno = EISDIR;
	    }
	}
    } else if (errno == EINVAL) {
	/*
	 * Windows NT reports removing a char device as EINVAL instead of
	 * EACCES.
	 */

	errno = EACCES;
    }

    return TCL_ERROR;
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpCreateDirectory --
 *
 *      Creates the specified directory.  All parent directories of the
 *	specified directory must already exist.  The directory is
 *	automatically created with permissions so that user can access
 *	the new directory and create new files or subdirectories in it.
 *
 * Results:
 *	If the directory was successfully created, returns TCL_OK.
 *	Otherwise the return value is TCL_ERROR and errno is set to
 *	indicate the error.  Some possible values for errno are:
 *
 *	EACCES:     a parent directory can't be read and/or written.
 *	EEXIST:	    path already exists.
 *	ENOENT:	    a parent directory doesn't exist.
 *
 * Side effects:
 *      A directory is created.
 *
 *---------------------------------------------------------------------------
 */

int
TclpCreateDirectory(
    char *path)			/* Pathname of directory to create */
{
    int error;

    if (CreateDirectory(path, NULL) == 0) {
	error = GetLastError();
	if (TclWinGetPlatformId() == VER_PLATFORM_WIN32s) {
	    if ((error == ERROR_ACCESS_DENIED) 
		    && (GetFileAttributes(path) != (DWORD) -1)) {
		error = ERROR_FILE_EXISTS;
	    }
	}
	TclWinConvertError(error);
	return TCL_ERROR;
    }   
    return TCL_OK;
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpCopyDirectory --
 *
 *      Recursively copies a directory.  The target directory dst must
 *	not already exist.  Note that this function does not merge two
 *	directory hierarchies, even if the target directory is an an
 *	empty directory.
 *
 * Results:
 *	If the directory was successfully copied, returns TCL_OK.
 *	Otherwise the return value is TCL_ERROR, errno is set to indicate
 *	the error, and the pathname of the file that caused the error
 *	is stored in errorPtr.  See TclpCreateDirectory and TclpCopyFile
 *	for a description of possible values for errno.
 *
 * Side effects:
 *      An exact copy of the directory hierarchy src will be created
 *	with the name dst.  If an error occurs, the error will
 *      be returned immediately, and remaining files will not be
 *	processed.
 *
 *---------------------------------------------------------------------------
 */

int
TclpCopyDirectory(
    char *src,			/* Pathname of directory to be copied. */
    char *dst,			/* Pathname of target directory. */
    Tcl_DString *errorPtr)	/* If non-NULL, initialized DString for
				 * error reporting. */
{
    int result;
    Tcl_DString srcBuffer;
    Tcl_DString dstBuffer;

    Tcl_DStringInit(&srcBuffer);
    Tcl_DStringInit(&dstBuffer);
    Tcl_DStringAppend(&srcBuffer, src, -1);
    Tcl_DStringAppend(&dstBuffer, dst, -1);
    result = TraverseWinTree(TraversalCopy, &srcBuffer, &dstBuffer, 
	    errorPtr);
    Tcl_DStringFree(&srcBuffer);
    Tcl_DStringFree(&dstBuffer);
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * TclpRemoveDirectory -- 
 *
 *	Removes directory (and its contents, if the recursive flag is set).
 *
 * Results:
 *	If the directory was successfully removed, returns TCL_OK.
 *	Otherwise the return value is TCL_ERROR, errno is set to indicate
 *	the error, and the pathname of the file that caused the error
 *	is stored in errorPtr.  Some possible values for errno are:
 *
 *	EACCES:     path directory can't be read and/or written.
 *	EEXIST:	    path is a non-empty directory.
 *	EINVAL:	    path is root directory or current directory.
 *	ENOENT:	    path doesn't exist or is "".
 * 	ENOTDIR:    path is not a directory.
 *
 *	EACCES:	    path is a char device (nul:, com1:, etc.) (95)
 *	EINVAL:	    path is a char device (nul:, com1:, etc.) (NT)
 *
 * Side effects:
 *	Directory removed.  If an error occurs, the error will be returned
 *	immediately, and remaining files will not be deleted.
 *
 *----------------------------------------------------------------------
 */

int
TclpRemoveDirectory(
    char *path,			/* Pathname of directory to be removed. */
    int recursive,		/* If non-zero, removes directories that
				 * are nonempty.  Otherwise, will only remove
				 * empty directories. */
    Tcl_DString *errorPtr)	/* If non-NULL, initialized DString for
				 * error reporting. */
{
    int result;
    Tcl_DString buffer;
    DWORD attr;

    if (RemoveDirectory(path) != FALSE) {
	return TCL_OK;
    }
    TclWinConvertError(GetLastError());
    if (path[0] == '\0') {
	/*
	 * Win32s thinks that "" is the same as "." and then reports EACCES
	 * instead of ENOENT.
	 */

	errno = ENOENT;
    }
    if (errno == EACCES) {
	attr = GetFileAttributes(path);
	if (attr != (DWORD) -1) {
	    if ((attr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
		/* 
		 * Windows 95 reports calling RemoveDirectory on a file as an 
		 * EACCES, not an ENOTDIR.
		 */
		
		errno = ENOTDIR;
		goto end;
	    }

	    if (attr & FILE_ATTRIBUTE_READONLY) {
		attr &= ~FILE_ATTRIBUTE_READONLY;
		if (SetFileAttributes(path, attr) == FALSE) {
		    goto end;
		}
		if (RemoveDirectory(path) != FALSE) {
		    return TCL_OK;
		}
		TclWinConvertError(GetLastError());
		SetFileAttributes(path, attr | FILE_ATTRIBUTE_READONLY);
	    }

	    /* 
	     * Windows 95 and Win32s report removing a non-empty directory 
	     * as EACCES, not EEXIST.  If the directory is not empty,
	     * change errno so caller knows what's going on.
	     */

	    if (TclWinGetPlatformId() != VER_PLATFORM_WIN32_NT) {
		HANDLE handle;
		WIN32_FIND_DATA data;
		Tcl_DString buffer;
		char *find;
		int len;

		Tcl_DStringInit(&buffer);
		find = Tcl_DStringAppend(&buffer, path, -1);
		len = Tcl_DStringLength(&buffer);
		if ((len > 0) && (find[len - 1] != '\\')) {
		    Tcl_DStringAppend(&buffer, "\\", 1);
		}
		find = Tcl_DStringAppend(&buffer, "*.*", 3);
		handle = FindFirstFile(find, &data);
		if (handle != INVALID_HANDLE_VALUE) {
		    while (1) {
			if ((strcmp(data.cFileName, ".") != 0)
				&& (strcmp(data.cFileName, "..") != 0)) {
			    /*
			     * Found something in this directory.
			     */

			    errno = EEXIST;
			    break;
			}
			if (FindNextFile(handle, &data) == FALSE) {
			    break;
			}
		    }
		    FindClose(handle);
		}
		Tcl_DStringFree(&buffer);
	    }
	}
    }
    if (errno == ENOTEMPTY) {
	/* 
	 * The caller depends on EEXIST to signify that the directory is
	 * not empty, not ENOTEMPTY. 
	 */

	errno = EEXIST;
    }
    if ((recursive != 0) && (errno == EEXIST)) {
	/*
	 * The directory is nonempty, but the recursive flag has been
	 * specified, so we recursively remove all the files in the directory.
	 */

	Tcl_DStringInit(&buffer);
	Tcl_DStringAppend(&buffer, path, -1);
	result = TraverseWinTree(TraversalDelete, &buffer, NULL, errorPtr);
	Tcl_DStringFree(&buffer);
	return result;
    }

    end:
    if (errorPtr != NULL) {
        Tcl_DStringAppend(errorPtr, path, -1);
    }
    return TCL_ERROR;
}

/*
 *---------------------------------------------------------------------------
 *
 * TraverseWinTree --
 *
 *      Traverse directory tree specified by sourcePtr, calling the function 
 *	traverseProc for each file and directory encountered.  If destPtr 
 *	is non-null, each of name in the sourcePtr directory is appended to 
 *	the directory specified by destPtr and passed as the second argument 
 *	to traverseProc() .
 *
 * Results:
 *      Standard Tcl result.
 *
 * Side effects:
 *      None caused by TraverseWinTree, however the user specified 
 *	traverseProc() may change state.  If an error occurs, the error will
 *      be returned immediately, and remaining files will not be processed.
 *
 *---------------------------------------------------------------------------
 */

static int 
TraverseWinTree(
    TraversalProc *traverseProc,/* Function to call for every file and
				 * directory in source hierarchy. */
    Tcl_DString *sourcePtr,	/* Pathname of source directory to be
				 * traversed. */
    Tcl_DString *targetPtr,	/* Pathname of directory to traverse in
				 * parallel with source directory. */
    Tcl_DString *errorPtr)	/* If non-NULL, an initialized DString for
				 * error reporting. */
{
    DWORD sourceAttr;
    char *source, *target, *errfile;
    int result, sourceLen, targetLen, sourceLenOriginal, targetLenOriginal;
    HANDLE handle;
    WIN32_FIND_DATA data;

    result = TCL_OK;
    source = Tcl_DStringValue(sourcePtr);
    sourceLenOriginal = Tcl_DStringLength(sourcePtr);
    if (targetPtr != NULL) {
	target = Tcl_DStringValue(targetPtr);
	targetLenOriginal = Tcl_DStringLength(targetPtr);
    } else {
	target = NULL;
	targetLenOriginal = 0;
    }

    errfile = NULL;

    sourceAttr = GetFileAttributes(source);
    if (sourceAttr == (DWORD) -1) {
	errfile = source;
	goto end;
    }
    if ((sourceAttr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
	/*
	 * Process the regular file
	 */

	return (*traverseProc)(source, target, sourceAttr, DOTREE_F, errorPtr);
    }

    /*
     * When given the pathname of the form "c:\" (one that already ends
     * with a backslash), must make sure not to add another "\" to the end
     * otherwise it will try to access a network drive.  
     */

    sourceLen = sourceLenOriginal;
    if ((sourceLen > 0) && (source[sourceLen - 1] != '\\')) {
	Tcl_DStringAppend(sourcePtr, "\\", 1);
	sourceLen++;
    }
    source = Tcl_DStringAppend(sourcePtr, "*.*", 3); 
    handle = FindFirstFile(source, &data);
    Tcl_DStringSetLength(sourcePtr, sourceLen);
    if (handle == INVALID_HANDLE_VALUE) {
	/* 
	 * Can't read directory
	 */

	TclWinConvertError(GetLastError());
	errfile = source;
	goto end;
    }

    result = (*traverseProc)(source, target, sourceAttr, DOTREE_PRED, errorPtr);
    if (result != TCL_OK) {
	FindClose(handle);
	return result;
    }

    if (targetPtr != NULL) {
	targetLen = targetLenOriginal;
	if ((targetLen > 0) && (target[targetLen - 1] != '\\')) {
	    target = Tcl_DStringAppend(targetPtr, "\\", 1);
	    targetLen++;
	}
    }

    while (1) {
	if ((strcmp(data.cFileName, ".") != 0)
	        && (strcmp(data.cFileName, "..") != 0)) {
	    /* 
	     * Append name after slash, and recurse on the file. 
	     */

	    Tcl_DStringAppend(sourcePtr, data.cFileName, -1);
	    if (targetPtr != NULL) {
		Tcl_DStringAppend(targetPtr, data.cFileName, -1);
	    }
	    result = TraverseWinTree(traverseProc, sourcePtr, targetPtr, 
		    errorPtr);
	    if (result != TCL_OK) {
		break;
	    }

	    /*
	     * Remove name after slash.
	     */

	    Tcl_DStringSetLength(sourcePtr, sourceLen);
	    if (targetPtr != NULL) {
		Tcl_DStringSetLength(targetPtr, targetLen);
	    }
	}
	if (FindNextFile(handle, &data) == FALSE) {
	    break;
	}
    }
    FindClose(handle);

    /*
     * Strip off the trailing slash we added
     */

    Tcl_DStringSetLength(sourcePtr, sourceLenOriginal);
    source = Tcl_DStringValue(sourcePtr);
    if (targetPtr != NULL) {
	Tcl_DStringSetLength(targetPtr, targetLenOriginal);
	target = Tcl_DStringValue(targetPtr);
    }

    if (result == TCL_OK) {
	/*
	 * Call traverseProc() on a directory after visiting all the
	 * files in that directory.
	 */

	result = (*traverseProc)(source, target, sourceAttr, 
		DOTREE_POSTD, errorPtr);
    }
    end:
    if (errfile != NULL) {
	TclWinConvertError(GetLastError());
	if (errorPtr != NULL) {
	    Tcl_DStringAppend(errorPtr, errfile, -1);
	}
	result = TCL_ERROR;
    }
	    
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * TraversalCopy
 *
 *      Called from TraverseUnixTree in order to execute a recursive
 *      copy of a directory.
 *
 * Results:
 *      Standard Tcl result.