let mut bytes = BytesMut::new(); bytes.put_slice(&req_bytes); return Some(Ok(bytes)); } } } #[inline] pub async fn next_timeout(&mut self, ms: u64) -> Option<Result<BytesMut, Error>> { if let Ok(res) = tokio::time::timeout(std::time::Duration::from_millis(ms), self...
幸运的是,rust提供了获取字符串元素的方法。 如果要操作标量值,可以使用chars()方法: for c in "नमस्ते".chars() { println!("{}", c); } न म स ् त े 1. 2. 3. 4. 5. 6. 7. 8. 9. bytes方法返回每一个原始字节: for b in "नमस्ते"...
unsafe { let s = CStr::from_bytes_with_nul(s.as_bytes()).expect("&str to cstr failed"); return output::get_strlen(s.as_ptr() as *mut i8); } } fn main() { c_say_hello(); println!("2+3={}",c_num(2,3)); //c中字符串以\0结 println!("\"hello world\" len is {...
("{}", String::from_utf8(buf.to_vec()).unwrap());print!("{}",encode(&buf, size)); } }fnencode(bytes: &[u8], size:usize)->String{letmutbuf= String::new();leti=0;formutiin0..(size /3) { i = i *3;letf= bytes[i];lets= bytes[i +1];lett= bytes[i +2]; buf.p...
相反,Rust的原生整数类型是精确大小的类型:i8、i16、i32、i64和i128分别是8、16、32、64和128位的有符号整数,而u8、u16、u32、u64和u128是其无符号变体。Rust还提供了isize和usize,它们对应于intptr_t和uintptr_t11。对齐要求与C语言完全相同。
网上只有 "123" 转成 123的例子, 可是我需要 "B8" 转 184 的功能呀, 只能自己撸一个 fnparse_hex_str(str:&String)->u64{letmutrst:u64=0;letlen=str.len();str.to_ascii_uppercase().bytes().enumerate().for_each(|(i,c)|{leta='A'asu8;letzero='0'asu8;letm=ifc>=a{c-a+10}else...
fn calculate_hash(index: &u64, timestamp: &u128, data: &String, previous_hash: &String) -> String { let message = format!("{}{}{}{}", index, timestamp, data, previous_hash); // 使用合适的哈希算法,这里简化处理 hex::encode(sha2::Sha256::digest(message.as_bytes())) ...
Suggest {to,from}_ne_bytes for transmutations between arrays and integers, etc #136083 commented on Mar 8, 2025 • 0 new comments Weekly `cargo update` #136077 commented on Mar 13, 2025 • 0 new comments x86-retpoline flag (target modifier) to enable retpoline-related target ...
Machine: Advanced Micro Devices X86-64 Version: 0x1 Entry point address: 0x0 Start of program headers: 0 (bytes into file) Start of section headers: 520 (bytes into file) Flags: 0x0 Size of this header: 64 (bytes) Size of program headers: 0 (bytes) ...
let bytes = s.as_bytes(); 接下来,使用 iter 方法在字节数组上创建一个迭代器: for(i, &item)inbytes.iter().enumerate() { 上述代码中, iter 方法返回集合中的每一个元素,而 enumerate 包装了 iter 的结果,将这些元素作为元组的一部分来返回。enumerate 返回的元组中,第一个元素是索引,第二个元素是集...