43 lines
913 B
Rust
43 lines
913 B
Rust
use std::time::{SystemTime, UNIX_EPOCH};
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use rand_mt::Mt64;
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pub fn cur_timestamp_ms() -> u64 {
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SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.unwrap()
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.as_millis() as u64
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}
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pub fn cur_timestamp() -> u64 {
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SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.unwrap()
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.as_secs() as u64
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}
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pub fn generate_xorpad(seed: u64) -> Box<[u8]> {
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let mut mt = Mt64::new(seed);
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let new_seed = mt.next_u64();
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mt.reseed(new_seed);
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mt.next_u64();
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let mut buf = Vec::with_capacity(4096);
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for _ in 0..512 {
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buf.extend(mt.next_u64().to_be_bytes());
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}
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buf.into()
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}
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pub fn xor(bytes: &mut [u8], key: &[u8]) {
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for i in 0..bytes.len() {
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bytes[i] ^= key[i % key.len()];
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}
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}
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pub fn hash_str(value: &str) -> u32 {
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value.chars().fold(0, |hash, c| {
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(((c as u64) + 131 * hash as u64) & 0xFFFFFFFF) as u32
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})
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}
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