UTrealloc
Routine
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void *UTrealloc (void *ptr, int size)
Purpose
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Reallocate a block of memory
Description
This routine invokes the system routine realloc to reallocate a block of
memory. Given a pointer to a block of memory allocated by UTmalloc or
UTrealloc, this routine returns a pointer to a (possiby moved) block of
memory of the given size. The contents will be unchanged up to the lesser of
the new and old sizes. Unlike the system routine realloc, this routine uses
a signed value for the size of the block of memory requested. If the size
requested is less than or equal to zero, any previous memory allocated is
freed up and a NULL pointer is returned. This is not an error condition.
However, if the system routine realloc returns an error, an error message is
printed and execution is terminated. The block of memory allocated can be
freed up using UTfree.
Parameters
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<- void *UTrealloc
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Pointer to the new allocated memory. This should be cast to the
appropriate pointer type.
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-> void *ptr
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Pointer to the old block of memory. If ptr is NULL, this routine does
the initial allocation.
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-> int size
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Size of the new memory block to be allocated. This is a signed value.
If size is less than or equal to zero, a NULL pointer is returned.
Author / revision
P. Kabal
/ Revision 1.11 2003/05/09
See Also
UTfree,
UTmalloc
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