1 files changed, 73 insertions, 0 deletions

diff --git a/src/analysis/scan/exprs/literal.c b/src/analysis/scan/exprs/literal.c
index de7e32a..b7aed5b 100644
--- a/src/analysis/scan/exprs/literal.c
+++ b/src/analysis/scan/exprs/literal.c
@@ -62,6 +62,9 @@ static bool g_scan_literal_expression_reduce_to_boolean(const GScanLiteralExpres
 /* Dénombre les éléments portés par une expression. */
 static bool g_scan_literal_expression_count(const GScanLiteralExpression *, GScanContext *, size_t *);
 
+/* Fournit un élément donné issu d'un ensemble constitué. */
+static bool g_scan_literal_expression_get_item(const GScanLiteralExpression *, size_t, GScanContext *, GScanExpression **);
+
 
 
 /* ---------------------------------------------------------------------------------- */
@@ -100,6 +103,7 @@ static void g_scan_literal_expression_class_init(GScanLiteralExpressionClass *kl
     expr->cmp_rich = (compare_expr_rich_fc)g_scan_literal_expression_compare_rich;
     expr->reduce_to_bool = (reduce_expr_to_bool_fc)g_scan_literal_expression_reduce_to_boolean;
     expr->count = (count_scan_expr_fc)g_scan_literal_expression_count;
+    expr->get = (get_scan_expr_fc)g_scan_literal_expression_get_item;
 
 }
 
@@ -120,6 +124,8 @@ static void g_scan_literal_expression_init(GScanLiteralExpression *expr)
 {
     G_SCAN_EXPRESSION(expr)->state = SRS_REDUCED;
 
+    memset(&expr->value, 0, sizeof(expr->value));
+
 }
 
 
@@ -156,6 +162,25 @@ static void g_scan_literal_expression_dispose(GScanLiteralExpression *expr)
 
 static void g_scan_literal_expression_finalize(GScanLiteralExpression *expr)
 {
+    switch (expr->value_type)
+    {
+        case LVT_STRING:
+            exit_szstr(&expr->value.string);
+            break;
+
+        case LVT_REG_EXPR:
+            if (expr->value.regex != NULL)
+            {
+                free(expr->value.regex);
+                regfree(&expr->value.preg);
+            }
+            break;
+
+        default:
+            break;
+
+    }
+
     G_OBJECT_CLASS(g_scan_literal_expression_parent_class)->finalize(G_OBJECT(expr));
 
 }
@@ -659,3 +684,51 @@ static bool g_scan_literal_expression_count(const GScanLiteralExpression *expr,
     return result;
 
 }
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : expr  = expression à consulter.                              *
+*                index = indice de l'élément à transférer.                    *
+*                ctx   = contexte de suivi de l'analyse courante.             *
+*                out   = zone d'enregistrement de la réduction opérée. [OUT]  *
+*                                                                             *
+*  Description : Fournit un élément donné issu d'un ensemble constitué.       *
+*                                                                             *
+*  Retour      : Bilan de l'opération : false en cas d'erreur irrécupérable.  *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+static bool g_scan_literal_expression_get_item(const GScanLiteralExpression *expr, size_t index, GScanContext *ctx, GScanExpression **out)
+{
+    bool result;                            /* Bilan à retourner           */
+    sized_string_t ch;                      /* Caractère extrait           */
+
+    switch (expr->value_type)
+    {
+        case LVT_STRING:
+
+            result = (index < expr->value.string.len);
+
+            if (result)
+            {
+                ch.data = expr->value.string.data + index;
+                ch.len = 1;
+
+                *out = g_scan_literal_expression_new(LVT_STRING, &ch);
+
+            }
+
+            break;
+
+        default:
+            result = false;
+            break;
+
+    }
+
+    return result;
+
+}