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range_ptrinbuf(3)     DragonFly Library Functions Manual     range_ptrinbuf(3)

NAME
       range_ptrinbuf - range check pointer in buffer

SYNTAX
       #include <rangecheck.h>

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

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

RETURN VALUE
       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.

SEE ALSO
       rangecheck(3)

                                                             range_ptrinbuf(3)