GET RESOURCE
GET RESOURCE ( resType ; resID ; resData {; resFile} )
| Parameter | Type | Description | |
|---|---|---|---|
| resType | Text | → | 4-character resource type |
| resID | Integer | → | Resource ID number |
| resData | Blob | → | BLOB field or variable to receive the data |
| ← | Contents of the resource | ||
| resFile | Time | → | Resource file reference number, or all open resource files, if omitted |
This command is not thread-safe, it cannot be used in preemptive code.
Description
The GET RESOURCE command returns in the BLOB field or variable resData the contents of the resource whose type and ID is passed in resType and resID.
Important: You must pass a 4-character string in resType.
If the resource is not found, the resData parameter is left unchanged and the OK variable is set to 0 (zero).
If you pass a valid resource file reference number in resFile, the resource is searched for in that file only. If you do not pass resFile, the first occurrence of the resource found in the resource files chain is returned.
Note: A resource can be at least several megabytes in size.
Platform independence
Remember that you are working with Mac OS-based resources. No matter what the platform, internal resource data such as Long Integer is stored using Macintosh byte ordering. On Windows, the data for standard resources (such as string list and pictures resources) is automatically byte swapped when necessary. On the other hand, if you create and use your own internal data structures, it is up to you to byte swap the data you extract from the BLOB (i.e., passing Macintosh byte ordering to a command such as BLOB to longint).
Example
See the example for the command.
System variables and sets
If the resource is found, OK is set to 1. Otherwise, it is set to 0 (zero).
Error management
If there is not enough memory to load the resource, an error is generated. You can catch this error with an error-handling method installed using ON ERR CALL.
See also
Resources