StratoSDK is a framework with a declarative approach similar to Flutter/React, written and designed entirely for Rust.
| 1 | use std::{fs, io, path::PathBuf}; |
| 2 | |
| 3 | use anyhow::Result; |
| 4 | |
| 5 | pub fn post_inc(value: &mut usize) -> usize { |
| 6 | let prev = *value; |
| 7 | *value += 1; |
| 8 | prev |
| 9 | } |
| 10 | |
| 11 | pub fn save_as_file(bytes: &[u8], output_path: PathBuf) -> Result<()> { |
| 12 | let mut content = std::io::Cursor::new(bytes); |
| 13 | if let Some(dir) = output_path.parent() { |
| 14 | fs::create_dir_all(dir)?; |
| 15 | } |
| 16 | let mut outfile = fs::File::create(output_path.as_path())?; |
| 17 | io::copy(&mut content, &mut outfile)?; |
| 18 | Ok(()) |
| 19 | } |
| 20 | |
| 21 | pub fn parse_u32(input: &[u8]) -> Option<u32> { |
| 22 | if input.is_empty() { |
| 23 | return None; |
| 24 | } |
| 25 | let mut num: u32 = 0; |
| 26 | for c in input { |
| 27 | let c = *c as char; |
| 28 | let digit = c.to_digit(10)?; |
| 29 | num = num.checked_mul(10).and_then(|v| v.checked_add(digit))?; |
| 30 | } |
| 31 | Some(num) |
| 32 | } |
| 33 | |
| 34 | pub fn parse_i32(input: &[u8]) -> Option<i32> { |
| 35 | if input.is_empty() { |
| 36 | return None; |
| 37 | } |
| 38 | |
| 39 | let mut negative = false; |
| 40 | let mut input = input; |
| 41 | |
| 42 | if input[0] == b'-' { |
| 43 | negative = true; |
| 44 | input = &input[1..]; |
| 45 | |
| 46 | if input.is_empty() { |
| 47 | return None; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | let mut num: i32 = 0; |
| 52 | for c in input { |
| 53 | let c = *c as char; |
| 54 | let digit = c.to_digit(10)?; |
| 55 | num = num |
| 56 | .checked_mul(10) |
| 57 | .and_then(|v| v.checked_add(digit as i32))?; |
| 58 | } |
| 59 | |
| 60 | if negative { |
| 61 | num = num.checked_neg()?; |
| 62 | } |
| 63 | |
| 64 | Some(num) |
| 65 | } |
| 66 | |
| 67 | #[cfg(test)] |
| 68 | #[path = "util_test.rs"] |
| 69 | mod tests; |
| 70 |