Function solana_rbpf::syscalls::gather_bytes

pub fn gather_bytes<E: UserDefinedError>(
    arg1: u64, 
    arg2: u64, 
    arg3: u64, 
    arg4: u64, 
    arg5: u64, 
    _ro_regions: &[MemoryRegion], 
    _rw_regions: &[MemoryRegion]
) -> Result<u64, EbpfError<E>>

The idea is to assemble five bytes into a single u64. For compatibility with the syscalls API, each argument must be a u64.

Examples

use solana_rbpf::syscalls::gather_bytes;
use solana_rbpf::memory_region::MemoryRegion;
use solana_rbpf::user_error::UserError;

let regions = [MemoryRegion::default()];
let gathered = gather_bytes::<UserError>(0x11, 0x22, 0x33, 0x44, 0x55, &regions, &regions).unwrap();
assert_eq!(gathered, 0x1122334455);