HP 3000 Manuals

HP C/iX Library Reference Manual

realloc 

Changes the size of a block of allocated memory.

Syntax 

     #include <stdlib.h>
     void *realloc (void *ptr, size_t size);

Parameters 

ptr           A pointer to a block of memory previously allocated.

size          The new size, in bytes.

Return Values 

x             A successful call to realloc() returns a pointer to the
              possibly moved block of allocated memory.

NULL          There is not enough available memory.  The block pointed to
              by ptr is left intact, or, size is 0.

Description 

The realloc function changes the size of the block pointed to by ptr to
size bytes and returns a pointer to the block.  The location of the block
may be changed by this function.  The contents are unchanged up to the
lesser of the new and old sizes.

See Also 

malloc(), free(), calloc() ANSI C 4.10.3.4, POSIX.1 8.1

MPE/iX 5.0 Documentation