54
Chapter 7: Flash Application Layout
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
The var and func keywords describe object frame variables and functions. FDL
creates macros which let you retrieve and change the values of attribute slots
and call functions in method slots. These created macros require the pointer to
an object frame as their first parameter.
Every application has an object frame interface to the OS. The app’s object
frame also serves as a shared-code library interface. As a convenience, so you
do not have to find the address of the app’s object frame, the keywords
appvar
and
appfunc
create macros which access an app’s object frame attributes given
its app ID.
Note:
The first parameter of a func declaration must be type pFrame, the first parameter of an
appfunc declaration must be type AppID.
The slot-number is an optional decimal (0 – 4294967295) or hexadecimal
(0x0 – 0xFFFFFFFF) number which identifies the slot which the variable or
method occupies. Subsequent slot-numbers are automatically incremented
unless a new value is supplied.
Since attribute slots are 32-bit values, types should declare values which fit in
32-bits, integers and pointers.
Note:
Functions which return nothing may declare a return type of void.
The FDL compiler accepts one command line parameter, the name of the file to
compile. It outputs a file of the same name with a .h extension. The output file
contains C macros for accessing object frame attributes and calling frame
methods. The resulting header file is suitable to include in your C source file.
Here is the actual header output file after running the FDL compiler on fileio.fdl in
section
7.3.3.1. Creating the Library Interface
.
/* FILE: fileio.h
CREATED: 2000.04.13 09:10
INPUT: fileio.fdl
GENERATOR: Frame Description Language compiler, version 2.000
*/
/* int * PlayerFileTableCount */
#define OO_PLAYER_FILE_TABLE_COUNT (65536)
➊
#define GetPlayerFileTableCount(obj) \
➋
(int *)OO_GetAppAttr(obj,65536)
#define SetPlayerFileTableCount(obj,value) \
➌
OO_SetAppAttr(obj,65536,(void *)value)
To Next Page
Loading...
Need help?
General
