range_ptrinbuf (3)

#include <rangecheck.h>

int range_ptrinbuf(const void* buf,size_t len,const void* ptr);

range_ptrinbuf checks if ptr points to buf[0..len-1].

If the buffer is implausible (buf is NULL or buf+len has an integer overflow), return 0.

If ptr points to one of buf[0], buf[1], ... or buf[len-1], return 1.

Otherwise, return 0.

rangecheck(3)