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path: root/src/analysis/scan/exprs/literal.c
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-rw-r--r--src/analysis/scan/exprs/literal.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/src/analysis/scan/exprs/literal.c b/src/analysis/scan/exprs/literal.c
index de7e32a..b1a094c 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;
}
@@ -659,3 +663,51 @@ 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;
+
+}