an> 
<p class="level1">To replace malloc() 
<p class="level0"><a name="void"></a><span class="nroffip">void free_callback(void *ptr);</span> 
<p class="level1">To replace free() 
<p class="level0"><a name="void"></a><span class="nroffip">void *realloc_callback(void *ptr, size_t size);</span> 
<p class="level1">To replace realloc() 
<p class="level0"><a name="char"></a><span class="nroffip">char *strdup_callback(const char *str);</span> 
<p class="level1">To replace strdup() 
<p class="level0"><a name="void"