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Coerce an expression into a PROG logical code pointer (LCPTR).
Syntax
prog (value)
During the evaluation of the parameter to this function, the search path used
for procedure name lookups is restricted to the program file (PROG).
Formal Declaration
prog:prog (value:any)
Parameters
- value
An expression to be coerced. All types are valid.
Table 10-9 Derivation of PROG LGRP Bit Pattern
Parameter Type |
Action |
BOOL | 0.1 if TRUE, 0.0 if FALSE. |
U16 U32 SPTR | Set the SID part to zero. Right
justify the original value in the low-order 32 bits of the offset
part with zero fill. |
S16 S32 S64 | Set the SID part to zero. Right
justify the original value in the low-order 32 bits of the offset
part with sign extension. |
LONG Class | Transfer both parts of the address
unchanged. |
EADDR SADDR | Transfer the SID part unchanged.
Transfer the low-order 32 bits of the offset part. |
STR | Transfer the ASCII bit pattern for the last eight
characters in the string. Strings shorter than eight characters are treated
as if they were extended on the left with nulls. |
Examples
%cmdebug > wl prog(12.304)
PROG %12.304
Coerce the simple long pointer into a PROG logical code pointer.
%cmdebug > wl prog( sort )
PROG %2.346
Print the address of the procedure named sort. Note that the search
path used for procedure name lookups is restricted to the program file
(PROG).
%cmdebug > wl prog(pub(24.630))
PROG %24.630
The coercion simply changes the associated logical file. The pointer's bit
pattern remains unchanged.
$nmdat > wl prog( 1 )
PROG $0.1
$nmdat > wl prog( ffff )
PROG $0.ffff
$nmdat > wl prog( 1234abcd )
PROG $0.1234abcd
$nmdat > wl prog( -1 )
PROG $0.ffffffff
$nmdat > wl prog( 1234.5678 )
PROG $1234.5678
$nmdat > wl prog( true )
PROG $0.1
$nmdat > wl prog( "ABCDEFG" )
PROG $414243.44454647
$nmdat > wl prog( grp(1.2) )
PROG $1.2
Limitations, Restrictions
none
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