Zilog Z8F0130 - Manual (Page 481)

UM013037-1212 realloc
Zilog Developer Studio II – Z8 Encore!
User Manual
457
Synopsis
#include

int rand(void)
Returns
A pseudorandom integer.
Example
int i;

srand(1001);

i=rand();
realloc
Changes the size of the object pointed to by ptr to the size specified by size. The contents
of the object are unchanged up to the lesser of the new and old sizes. If ptr is a null pointer,
the
realloc function behaves similarly to the malloc function for the specified size.
Otherwise, if ptr does not match a pointer earlier returned by the calloc , malloc , or
realloc function, or if the space has been deallocated by a call to the free or realloc
function, the behavior is undefined. If the space cannot be allocated, the realloc func-
tion returns a null pointer and the object pointed to by ptr is unchanged. If size is zero, the
realloc function returns a null pointer and, if ptr is not a null pointer, the object it points
to is freed.
Synopsis
#include

void *realloc(void *ptr, size_t size);
Returns
Returns a pointer to the start (lowest byte address) of the possibly moved object.
Example
char *buf;

buf=(char *) malloc(40*sizeof(char));

buf=(char *) realloc(buf, 80*sizeof(char));

if(buf !=NULL)

/*success*/

else

/*fail*/