feat: Implement a first version of the decode_zone_memoire function

crates/sesam-vitale/src/ssvlib_demo.rs

@@ -1,24 +1,19 @@
+extern crate dotenv;
 /**
  * High level API for the SSV library,
  * based on the low level bindings in libssv.rs.
- * 
+ *
  */
-
 extern crate libc;
-extern crate dotenv;
 
-use libc::{ c_void, size_t };
+use libc::{c_void, size_t};
 use std::ffi::CString;
 use std::path::PathBuf;
 use std::ptr;
 
 use std::env;
 
-use crate::libssv:: {
-    SSV_InitLIB2,
-    SSV_LireCartePS,
-    SSV_LireConfig
-};
+use crate::libssv::{SSV_InitLIB2, SSV_LireCartePS, SSV_LireConfig};
 
 fn ssv_init_lib_2() {
     let ini_str = env::var("SESAM_INI_PATH").expect("SESAM_INI_PATH must be set");
@@ -36,18 +31,19 @@ fn ssv_lire_carte_ps() {
 
     let mut buffer: *mut c_void = ptr::null_mut();
     let mut size: size_t = 0;
+    let mut hex_values: &[u8] = &[];
     unsafe {
         let result = SSV_LireCartePS(
             resource_ps.as_ptr(),
             resource_reader.as_ptr(),
             card_number.as_ptr(),
             &mut buffer,
-            &mut size
+            &mut size,
         );
         println!("SSV_LireCartePS result: {}", result);
 
         if !buffer.is_null() {
-            let hex_values = std::slice::from_raw_parts(buffer as *const u8, size);
+            hex_values = std::slice::from_raw_parts(buffer as *const u8, size);
             for &byte in hex_values {
                 print!("{:02X} ", byte);
             }
@@ -56,6 +52,93 @@ fn ssv_lire_carte_ps() {
             libc::free(buffer);
         }
     }
+    decode_zone_memoire(hex_values);
+}
+
+pub fn decode_zone_memoire(bytes: &[u8]) {
+    // Maintenant, vous pouvez accéder aux octets individuels dans `donnees`
+    for &octet in bytes {
+        println!("Octet: {}", octet);
+    }
+
+    let mut current_pos_general = 0;
+    let mut current_groupe = 0;
+    let mut num_champ = 0;
+
+    while current_pos_general < bytes.len() - 1 {
+        num_champ = 0;
+        current_groupe =
+            256 * bytes[current_pos_general] as i32 + bytes[current_pos_general + 1] as i32;
+        current_pos_general += 2;
+
+        let longueur_groupe: usize;
+        if bytes[current_pos_general] < 128 {
+            longueur_groupe = bytes[current_pos_general] as usize;
+        } else {
+            let nbre_octets_longueur = bytes[current_pos_general] - 128;
+            longueur_groupe = (0..nbre_octets_longueur).fold(0, |acc, i| {
+                current_pos_general += 1;
+                acc + (256_i32.pow(i as u32) * bytes[current_pos_general] as i32) as usize
+            });
+        }
+        current_pos_general += 1;
+
+        let mut current_pos_groupe = 0;
+        while current_pos_groupe < longueur_groupe {
+            num_champ += 1;
+            let longueur_champs: usize;
+            let nbre_octets_longueur: usize;
+            if bytes[current_pos_general] < 128 {
+                longueur_champs = bytes[current_pos_general] as usize;
+                nbre_octets_longueur = 1;
+            } else {
+                nbre_octets_longueur = bytes[current_pos_general] as usize - 128;
+                longueur_champs = (0..nbre_octets_longueur).fold(0, |acc, i| {
+                    current_pos_general += 1;
+                    current_pos_groupe += 1;
+                    acc + (256_i32.pow(i as u32) * bytes[current_pos_general] as i32) as usize
+                });
+            }
+
+            let mut bytes_champ = vec![0; longueur_champs];
+            if longueur_champs > 0 {
+                bytes_champ.copy_from_slice(
+                    &bytes[current_pos_general + nbre_octets_longueur
+                        ..current_pos_general + nbre_octets_longueur + longueur_champs],
+                );
+
+                match current_groupe {
+                    1 => match num_champ {
+                        1 => println!("Groupe1.Champ1: {}", String::from_utf8_lossy(&bytes_champ)),
+                        2 => println!("Groupe1.Champ2: {}", String::from_utf8_lossy(&bytes_champ)),
+                        3 => println!("Groupe1.Champ3: {}", String::from_utf8_lossy(&bytes_champ)),
+                        4 => println!("Groupe1.Champ4: {}", String::from_utf8_lossy(&bytes_champ)),
+                        5 => println!("Groupe1.Champ5: {}", String::from_utf8_lossy(&bytes_champ)),
+                        6 => println!("Groupe1.Champ6: {}", String::from_utf8_lossy(&bytes_champ)),
+                        7 => println!("Groupe1.Champ7: {}", String::from_utf8_lossy(&bytes_champ)),
+                        8 => println!("Groupe1.Champ8: {}", String::from_utf8_lossy(&bytes_champ)),
+                        _ => (),
+                    },
+                    2 => match num_champ {
+                        1 => {
+                            // Ajoutez votre logique pour Groupe2 ici
+                        }
+                        2 => {
+                            // Ajoutez votre logique pour Groupe2 ici
+                        }
+                        3 => {
+                            // Ajoutez votre logique pour Groupe2 ici
+                        }
+                        _ => (),
+                    },
+                    _ => (),
+                }
+            }
+
+            current_pos_general += longueur_champs + nbre_octets_longueur;
+            current_pos_groupe += longueur_champs + nbre_octets_longueur;
+        }
+    }
 }
 
 fn ssv_lire_config() {
@@ -81,7 +164,7 @@ pub fn demo() {
     /*
      * TODO : this is probably not working on release, because I'm not sure it exists a CARGO_MANIFEST_DIR and so it can find the `.env`
      * Maybe we could use a system standard config path to store a config file
-     */ 
+     */
     let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
     let manifest_path = PathBuf::from(manifest_dir);
     dotenv::from_path(manifest_path.join(".env")).ok();