RESIZE
|
|
dynamic-clause |
|
[GIVING
operand5]
|
| array-clause |
This document covers the following topics:
For an explanation of the symbols used in the syntax diagram, see Syntax Symbols.
Related Statements: EXPAND | REDUCE
Belongs to Function Group: Memory Management Control for Dynamic Variables or X-Arrays.
The RESIZE statement is used to adjust:
the size of a dynamic variable
(dynamic-clause), or
the number of occurrences of X-arrays
(array-clause).
For further information, see also the following sections in the Programming Guide:
Using Dynamic
Variables
Allocating/Freeing Memory Space for a
Dynamic Variable
X-Arrays
Storage
Management of X-Group Arrays
Operand Definition Table:
| Operand | Possible Structure | Possible Formats | Referencing Permitted | Dynamic Definition | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
operand1
|
S | A | A | U | B | no | no | |||||||||||||
operand2
|
C | S | I | no | no | |||||||||||||||
operand3
|
A | G | A | N | P | I | F | B | D | T | L | C | G | O | yes | no | ||||
operand4
|
C | S | N | P | I | no | no | |||||||||||||
operand5
|
S | I4 | no | yes | ||||||||||||||||
Syntax Element Description:
| Syntax Element | Description |
|---|---|
dynamic-clause
|
The RESIZE DYNAMIC statement adjusts the allocated
length of the currently allocated storage of a dynamic variable
(operand1) to the value specified with
operand2. For more information, see
Dynamic
Clause below.
|
operand1
|
operand1 is the dynamic
variable for which the length is to be adjusted.
|
operand2
|
operand2 is used to
specify the new length of the dynamic variable. The value specified must be a
non-negative numeric integer constant or a variable of type Integer4
(I4).
|
array-clause
|
The RESIZE ARRAY statement adjusts the number of
occurrences of the X-array (operand3)
to the upper and lower bound specified with (dim[,dim[,dim]]).
For more information, see Array Clause
below.
|
operand3
|
operand3 is the
X-array. The occurrences of the X-array can be expanded or reduced. The
index notation
of the array is optional. As index notation only the complete range notation
* is allowed for each dimension.
|
dim
|
The lower and upper bound notation
(operand4 or asterisk) to which the
X-array should be expanded is specified here. If the current value of the upper
or lower bound should be used, an asterisk (*) must be specified in place of
operand4. For further information, see
Dimension below.
|
GIVING
operand5
|
If the If the |
[SIZE OF] DYNAMIC [VARIABLE]
operand1
TO
operand2
|
The RESIZE DYNAMIC statement adjusts the allocated length
of a dynamic variable (operand1) to the
value specified with operand2.
When the RESIZE statement is used, the currently allocated
storage size will be adjusted to the requested values, regardless whether it
must be increased or decreased.
[AND RESET] [OCCURRENCES OF] ARRAY
operand3
TO (dim[,dim[,dim]])
|
The RESIZE ARRAY statement adjusts the number of
occurrences of the X-array
(operand3) to the upper and lower bound
specified with (dim[,dim[,dim]]).
The RESET option resets all occurrences of the resized
X-array to its default zero value. By default (no RESET option),
the actual values are kept and the resized (new) occurrences are reset.
An upper or lower bound used in an RESIZE statement must
be exactly the same as the corresponding upper or lower bound defined for the
array.
DEFINE DATA LOCAL
1 #a(I4/1:*)
1 #g(1:*)
2 #ga(I4/1:*)
1 #i(i4)
END-DEFINE
...
*/ resizing #a (1:10)
RESIZE ARRAY #a TO (1:10) /* #a is resized to
RESIZE ARRAY #a TO (*:10) /* 10 occurrences.
/* resizing #ga (1:10,1:20)
RESIZE ARRAY #g TO (1:10) /* 1st dimension is set to (1:10)
RESIZE ARRAY #ga TO (*:*,1:20) /* 1st dimension is dependent and
/* therefore kept with (*:*)
/* 2nd dimension is set to (1:20)
RESIZE ARRAY #a TO (5:10) /* This is rejected because the lower index
/* must be 1 or *
RESIZE ARRAY #a TO (#i:10) /* This is rejected because the lower index
/* must be 1 or *
RESIZE ARRAY #ga TO (1:10,1:20) /* (1:10) for the 1st dimension is rejected
/* because the dimension is dependent and
/* must be specified with (*:*).
For further information, see the following sections in the Programming Guide:
|
|
operand4 |
|
:
|
|
operand4 |
|
| * | * |
The lower and upper bound notation
(operand4 or asterisk) to which the
X-array should be expanded
is specified here. If the current value of the upper or lower bound should be
used, an asterisk (*) may be specified in place of
operand4. In place of *.*,
you may also specify a single asterisk.
The number of dimensions (dim)
must exactly match the defined number of dimensions of the X-array (1, 2, or
3).
If the number of occurrences for a specified dimension is less than the number of the currently allocated occurrences, the number of occurrences is not changed for the corresponding dimension.