HP 3000 Manuals HP 3000 Manuals
func cstx
Coerces an expression into a CSTX absolute code pointer (ACPTR).
Syntax
cstx (value)
CM program segments are loaded into the CSTX. CM library segments are
loaded into the CST.
During the evaluation of the parameter to the CSTX function, the CM
search path is limited to the program file (PROG).
Formal Declaration
cstx:cstx (value:any)
Parameters
value An expression to be coerced. All types are valid.
Derivation of the CSTX Bit Pattern
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| | |
| Parameter Type | Action |
| | |
--------------------------------------------------------------------------------------------
| | |
| BOOL | 0.1 if TRUE, 0.0 if FALSE. |
| | |
--------------------------------------------------------------------------------------------
| | |
| U16 | Set the high-order 32 bits (SID or segment part) to zero. |
| S16 | Right justify the original 16-bit value in the low-order 32 |
| | bits (offset part) with zero fill. |
| | |
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| | |
| U32 | Set the high-order 32 bits (SID or segment part) to zero. |
| S32 | Transfer the original bit pattern into the low-order 32 bits |
| SPTR | (offset part) unchanged. |
| | |
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| | |
| LPTR SYS | Transfer both parts of the address unchanged. |
| PROG USER | |
| GRP TRANS | |
| PUB CST | |
| LGRP CSTX | |
| LPUB | |
| | |
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| | |
| 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. |
| | |
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Examples
%cmdebug > wl cstx(12.304)
CSTX %12.304
Coerce the simple long pointer into a CSTX absolute code pointer.
%cmdebug > wl cstx( sort )
CSTX %4.3302
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 cstx(sys(24.630))
CSTX %24.630
The coercion simply changes the associated absolute file. Note that no
complicated conversion or range checking is performed.
Limitations, Restrictions
none