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range_bufinbuf(3)     DragonFly Library Functions Manual     range_bufinbuf(3)

NAME
       range_bufinbuf - range check for buf in buffer

SYNTAX
       #include <rangecheck.h>

       int range_bufinbuf(const void* buf1,size_t len1,
                          const void* buf2,size_t len2);

DESCRIPTION
       range_bufinbuf checks that the buffer buf2[0..len2-1] lies entirely in
       buf1[0..len1].

       If the buffer is 0-terminated and you don't know the length beforehand,
       use range_strinbuf, range_str2inbuf or range_str4inbuf instead.

RETURN VALUE
       If one of the buffers is implausible (buf is NULL or buf+len has an
       integer overflow), return 0.

       If the buf2[0..len2-1] lies before or after buf1[0..len1-1], return 0.

       Otherwise, return 1.

SEE ALSO
       rangecheck(3)

                                                             range_bufinbuf(3)