Function msgpack_document_len 

pub fn msgpack_document_len(
    bytes: &[u8],
    max_depth: usize,
) -> Result<usize, MsgpackStructureError>

Runs the walk check_msgpack_structure describes and returns the length, in bytes, of the document at the start of bytes.

It accepts and rejects exactly what check_msgpack_structure does. The walk stops where the document ends, so the length is at least 1 and at most bytes.len(), and a length below bytes.len() means trailing bytes follow. A caller that requires the input to be exactly one document compares the two instead of walking the input a second time.

Errors

The same MsgpackStructureError, for the same inputs, as check_msgpack_structure.

Examples

use cachekit_core::msgpack_document_len;

// nil, then two bytes the walk never reads (so 0xc1 is not rejected here).
let input = [0xc0, 0xc1, 0xff];
assert_eq!(msgpack_document_len(&input, 100), Ok(1));

// [[nil], "x"]: five bytes, the whole input.
let doc = [0x92, 0x91, 0xc0, 0xa1, b'x'];
assert_eq!(msgpack_document_len(&doc, 100), Ok(doc.len()));