Ex_Getarg - Texas Instruments TI-89 Developer's Manual

1102

EX_getArg

Declaration: EStackIndex EX_getArg (USHORT j )
Category(ies): Utilities
Description: Retrieves a pointer to the jth argument of an ASM program.
ASM programs can be called with arguments from TI-BASIC programs and
from the Home screen author line. The arguments are evaluated and
pushed on the estack from left to right. The left-most argument is deepest
on the estack when the ASM program is called.
Inputs: j
Outputs: Returns pointer to jth argument on the estack or NULL if j is past end of
argument list.
Assumptions: None
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: next_expression_index
Example:
EStackIndex e;
USHORT j;
.
.
.
/* Process each arg until NULL arg encountered */
for (j = 0; (e = EX_getArg(j)) != NULL; j += 1)
{
processArg(e);
}
TI-89 / TI-92 Plus Developer Guide
— Argument number to retrieve. 0 retrieves the right-most argument.
Not for Distribution
Appendix A: System Routines — Utilities
Beta Version January 26, 2001