From b343675fa783b89273726605e2d16c3ac771c410 Mon Sep 17 00:00:00 2001
From: zeefaad <zefad83@gmail.com>
Date: Fri, 13 Feb 2026 17:13:11 +0100
Subject: [PATCH] vraiment la merde

---
 Code/ldpc/src/decoder/bit_flip.rs |  2 +-
 Code/ldpc/src/main.rs             |  4 +++-
 Code/ldpc/src/simulation.rs       | 14 +++++++++++---
 Code/ldpc/src/utils.rs            | 26 ++++++++++++++++++++++++++
 4 files changed, 41 insertions(+), 5 deletions(-)
 create mode 100644 Code/ldpc/src/utils.rs

diff --git a/Code/ldpc/src/decoder/bit_flip.rs b/Code/ldpc/src/decoder/bit_flip.rs
index 9cc2ba3..bd57994 100644
--- a/Code/ldpc/src/decoder/bit_flip.rs
+++ b/Code/ldpc/src/decoder/bit_flip.rs
@@ -35,7 +35,7 @@ impl<'a> BitFlipDecoder<'a> {
                 }
             }
 
-            println!("poid syndome: {s_w}");
+            // println!("poid syndome: {s_w}");
             // Aucune erreurs
             if s_w == 0 {
                 return Some(curr_bits);
diff --git a/Code/ldpc/src/main.rs b/Code/ldpc/src/main.rs
index 4a42bd4..76ebf54 100644
--- a/Code/ldpc/src/main.rs
+++ b/Code/ldpc/src/main.rs
@@ -7,6 +7,7 @@ mod encoder;
 mod matrix;
 mod simulation;
 mod tanner;
+mod utils;
 
 use analysis::{AnalysisConfig, Analyzer, DecoderAlgorithm};
 
@@ -28,5 +29,6 @@ fn main() {
     // let res = Analyzer::run_batch(config);
     // Analyzer::save_csv(&res, "ldpc_analysis_results.csv");
 
-    simulation::run_simulation(300, 3, 6, 0.012);
+    let message = "Je";
+    simulation::run_simulation(message, 3, 6, 0.02);
 }
diff --git a/Code/ldpc/src/simulation.rs b/Code/ldpc/src/simulation.rs
index 6eac35f..530426d 100644
--- a/Code/ldpc/src/simulation.rs
+++ b/Code/ldpc/src/simulation.rs
@@ -6,12 +6,15 @@ use crate::code::{self, LdpcCode};
 use crate::construction::random::{generate_random_h, generate_random_h_for_k};
 use crate::decoder::bit_flip::BitFlipDecoder;
 use crate::encoder::dense::DenseEncoder;
+use crate::utils;
 use rand::{Rng, RngExt};
 
-pub fn run_simulation(k: usize, wc: usize, wr: usize, error_prob: f64) {
+pub fn run_simulation(text: &str, wc: usize, wr: usize, error_prob: f64) {
+    let mut message_bits = utils::string_to_bits(text);
+    let k = message_bits.len();
     println!(
-        "\nSimulation LDPC : k = {} bits, wc = {}, wr = {}, p = {:.2}",
-        k, wc, wr, error_prob
+        "\nSimulation LDPC : k = {} bits, wc = {}, wr = {}, p = {:.2}, text : {}",
+        k, wc, wr, error_prob, text
     );
 
     println!("Construction");
@@ -68,17 +71,22 @@ pub fn run_simulation(k: usize, wc: usize, wr: usize, error_prob: f64) {
 
     match decoder.decode(&received, max_iter) {
         Some(decoded) => {
+            let decoded_message = &decoded[0..encoder.k];
+            let res_text = utils::bits_to_string(decoded_message);
             if decoded == codeword {
                 println!("  -> Réussite");
             } else {
                 println!("  -> Echec : le decoder a convergé vers un mauvais codeword");
             }
+            println!("  -> Texte recu : {}", res_text);
         }
         None => {
+            let failed_text = utils::bits_to_string(&received[0..encoder.k]);
             println!(
                 "  -> Echec : impossible decorriger après {} itérations",
                 max_iter
             );
+            println!("  -> Texte recu : {}", failed_text);
         }
     }
 }
diff --git a/Code/ldpc/src/utils.rs b/Code/ldpc/src/utils.rs
new file mode 100644
index 0000000..3c69150
--- /dev/null
+++ b/Code/ldpc/src/utils.rs
@@ -0,0 +1,26 @@
+pub fn string_to_bits(s: &str) -> Vec<u8> {
+    let mut bits = Vec::new();
+    for byte in s.as_bytes() {
+        for i in (0..8).rev() {
+            bits.push((byte >> i) & 1);
+        }
+    }
+    bits
+}
+
+pub fn bits_to_string(bits: &[u8]) -> String {
+    let mut bytes = Vec::new();
+    for chunk in bits.chunks(8) {
+        if chunk.len() < 8 {
+            break;
+        }
+        let mut byte = 0u8;
+        for (i, &bit) in chunk.iter().enumerate() {
+            if bit == 1 {
+                byte |= 1 << (7 - i);
+            }
+        }
+        bytes.push(byte);
+    }
+    String::from_utf8_lossy(&bytes).into_owned()
+}