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/* void * realloc( void *, size_t )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#ifndef REGTEST
/* TODO: Primitive placeholder. Improve. */
void * realloc( void * ptr, size_t size )
{
void * newptr = NULL;
if ( ptr == NULL )
{
return malloc( size );
}
if ( size > 0 )
{
struct _PDCLIB_memnode_t * baseptr = (struct _PDCLIB_memnode_t *)( (char *)ptr - sizeof( struct _PDCLIB_memnode_t ) );
if ( baseptr->size >= size )
{
/* Current memnode is large enough; nothing to do. */
return ptr;
}
else
{
/* Get larger memnode and copy over contents. */
if ( ( newptr = malloc( size ) ) == NULL )
{
return NULL;
}
memcpy( newptr, ptr, baseptr->size );
}
}
free( ptr );
return newptr;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
int main( void )
{
/* tests covered in malloc test driver */
return TEST_RESULTS;
}
#endif
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