35 lines
1022 B
Rust
35 lines
1022 B
Rust
use crate::matrix::MatrixGF2;
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use rand::RngExt;
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pub fn generate_random_h(rows: usize, cols: usize, wc: usize, wr: usize) -> MatrixGF2 {
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assert_eq!(rows * wr, cols * wc, "Erreur");
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loop {
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let mut data = vec![0; rows * cols];
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let mut row_w = vec![0; rows];
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let mut rng = rand::rng();
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let mut success = true;
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for c in 0..cols {
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let mut ones_placed = 0;
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let mut avail_rows: Vec<usize> = (0..rows).filter(|&r| row_w[r] < wr).collect();
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if avail_rows.len() < wc {
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// Les problèmes...
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success = false;
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break;
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}
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while ones_placed < wc {
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let id = rng.random_range(0..avail_rows.len());
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let r = avail_rows.remove(id);
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data[r * cols + c] = 1;
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row_w[r] += 1;
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ones_placed += 1;
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}
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}
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if success {
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return MatrixGF2::new(rows, cols, data);
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}
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}
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}
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