SIMPLE SOLUTIONS

RANGE_BUFINBUF - reference manual online

Range check for buf in buffer.

Chapter
range_bufinbuf(3)                    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_strinā€ buf, 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)
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range_bufinbuf(3) referred by rangecheck(3)
refer to rangecheck(3)