Legacy Document

Inside Macintosh: Devices /

Chapter 2 - Slot Manager / Slot Manager Reference

Low-Level Routines /

SGetSRsrcPtr

This function is used only by the Macintosh Operating System.

FUNCTION SGetSRsrcPtr (spBlkPtr: SpBlockPtr): OSErr;

spBlkPtr

A pointer to a Slot Manager parameter block.

<--	spsPointer	Ptr	A pointer to an sResource (described in "The sResource," beginning on page 2-7).
-->	spParamData	LongInt	The parameter flags.
-->	spSlot	SignedByte	The slot number of the requested sResource.
-->	spID	SignedByte	The sResource ID of the requested sResource.
-->	spExtDev	SignedByte	The external device identifier.

DESCRIPTION

The SGetSRsrcPtr function finds an sResource given its slot number and sResource ID.
This function can search disabled sResources.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the SGetSRsrcPtr function are

Trap macro	Selector
_Slot Manager	$001D

On entry, register D0 contains the routine selector and register A0 contains the address of the Slot Manager parameter block. When _SlotManager returns, register D0 contains the result code.

Registers on entry
A0	Address of the parameter block
D0	$001D

Registers on exit
D0	Result code

RESULT CODES

noErr	0	No error
smNoMoresRsrcs	-344	Requested sResource not found

SEE ALSO

For information about the high-level routines for locating sResources, see "Finding sResources," beginning on page 2-31.