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resource(n) Tcl Built-In Commands resource(n)
NAME
resource - Manipulate Macintosh resources
SYNOPSIS
resource option ?arg arg ...?
DESCRIPTION
The resource command provides some generic operations for dealing with
Macintosh resources. This command is only supported on the Macintosh
platform. Each Macintosh file consists of two forks: a data fork and a
resource fork. You use the normal open, puts, close, etc. commands to
manipulate the data fork. You must use this command, however, to
interact with the resource fork. Option indicates what resource com-
mand to perform. Any unique abbreviation for option is acceptable.
The valid options are:
resource close rsrcRef
Closes the given resource reference (obtained from resource
open). Resources from that resource file will no longer be
available.
resource delete ?options? resourceType
This command will delete the resource specified by options and
type resourceType (see RESOURCE TYPES below). The options give
you several ways to specify the resource to be deleted.
-id resourceId
If the -id option is given the id resourceId (see
RESOURCE IDS below) is used to specify the resource to be
deleted. The id must be a number - to specify a name use
the -name option.
-name resourceName
If -name is specified, the resource named resourceName
will be deleted. If the -id is also provided, then there
must be a resource with BOTH this name and this id. If
no name is provided, then the id will be used regardless
of the name of the actual resource.
-file resourceRef
If the -file option is specified then the resource will
be deleted from the file pointed to by resourceRef. Oth-
erwise the first resource with the given resourceName and
or resourceId which is found on the resource file path
will be deleted. To inspect the file path, use the
resource files command.
resource files ?resourceRef?
If resourceRefis not provided, this command returns a Tcl list
of the resource references for all the currently open resource
files. The list is in the normal Macintosh search order for
resources. If resourceRef is specified, the command will return
the path to the file whose resource fork is represented by that
token.
resource list resourceType ?resourceRef?
List all of the resources ids of type resourceType (see RESOURCE
TYPES below). If resourceRef is specified then the command will
limit the search to that particular resource file. Otherwise,
all resource files currently opened by the application will be
searched. A Tcl list of either the resource name's or resource
id's of the found resources will be returned. See the RESOURCE
IDS section below for more details about what a resource id is.
resource open fileName ?access?
Open the resource for the file fileName. Standard file access
permissions may also be specified (see the manual entry for open
for details). A resource reference (resourceRef) is returned
that can be used by the other resource commands. An error can
occur if the file doesn't exist or the file does not have a
resource fork. However, if you open the file with write permis-
sions the file and/or resource fork will be created instead of
generating an error.
resource read resourceType resourceId ?resourceRef?
Read the entire resource of type resourceType (see RESOURCE
TYPES below) and the name or id of resourceId (see RESOURCE IDS
below) into memory and return the result. If resourceRef is
specified we limit our search to that resource file, otherwise
we search all open resource forks in the application. It is
important to note that most Macintosh resource use a binary for-
mat and the data returned from this command may have embedded
NULLs or other non-ASCII data.
resource types ?resourceRef?
This command returns a Tcl list of all resource types (see
RESOURCE TYPES below) found in the resource file pointed to by
resourceRef. If resourceRef is not specified it will return all
the resource types found in every resource file currently opened
by the application.
resource write ?options? resourceType data
This command will write the passed in data as a new resource of
type resourceType (see RESOURCE TYPES below). Several options
are available that describe where and how the resource is
stored.
-id resourceId
If the -id option is given the id resourceId (see
RESOURCE IDS below) is used for the new resource, other-
wise a unique id will be generated that will not conflict
with any existing resource. However, the id must be a
number - to specify a name use the -name option.
-name resourceName
If -name is specified the resource will be named
resourceName, otherwise it will have the empty string as
the name.
-file resourceRef
If the -file option is specified then the resource will
be written in the file pointed to by resourceRef, other-
wise the most recently open resource will be used.
-force If the target resource already exists, then by default
Tcl will not overwrite it, but raise an error instead.
Use the -force flag to force overwriting the extant
resource.
RESOURCE TYPES
Resource types are defined as a four character string that is then
mapped to an underlying id. For example, TEXT refers to the Macintosh
resource type for text. The type STR# is a list of counted strings.
All Macintosh resources must be of some type. See Macintosh documenta-
tion for a more complete list of resource types that are commonly used.
RESOURCE IDS
For this command the notion of a resource id actually refers to two
ideas in Macintosh resources. Every place you can use a resource Id
you can use either the resource name or a resource number. Names are
always searched or returned in preference to numbers. For example, the
resource list command will return names if they exist or numbers if the
name is NULL.
PORTABILITY ISSUES
The resource command is only available on Macintosh.
SEE ALSO
open(n)
KEYWORDS
open, resource
Tcl 8.0 resource(n)
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