--- rpl/src/interface_cas.cpp	2011/08/06 10:32:12	1.13
+++ rpl/src/interface_cas.cpp	2011/08/09 10:30:37	1.14
@@ -45,6 +45,21 @@ using namespace std;
 	using namespace giac;
 #endif
 
+void
+initialisation_contexte_cas(struct_processus *s_etat_processus)
+{
+	s_etat_processus->contexte_cas = NULL;
+	return;
+}
+
+void
+liberation_contexte_cas(struct_processus *s_etat_processus)
+{
+	delete reinterpret_cast<giac::context *>(s_etat_processus->contexte_cas);
+	s_etat_processus->contexte_cas = NULL;
+
+	return;
+}
 
 static unsigned char *
 conversion_rpl_vers_cas(struct_processus *s_etat_processus,
@@ -403,6 +418,35 @@ interface_cas(struct_processus *s_etat_p
 
 	unsigned int			position;
 
+	giac::context			*contexte;
+
+	if (s_etat_processus->contexte_cas == NULL)
+	{
+		try
+		{
+			s_etat_processus->contexte_cas = new giac::context;
+		}
+		catch(bad_alloc exception)
+		{
+			s_etat_processus->erreur_systeme = d_es_allocation_memoire;
+			return;
+		}
+		catch(...)
+		{
+			s_etat_processus->erreur_execution = d_ex_erreur_interne_rplcas;
+			return;
+		}
+	}
+
+	contexte = reinterpret_cast<giac::context *>(
+			s_etat_processus->contexte_cas);
+
+	if ((s_etat_processus->erreur_execution != d_ex) ||
+			(s_etat_processus->erreur_systeme != d_es))
+	{
+		return;
+	}
+
 	switch(commande)
 	{
 		case RPLCAS_INTEGRATION:
@@ -441,16 +485,15 @@ interface_cas(struct_processus *s_etat_p
 
 			try
 			{
-				giac::context 	contexte;
-
 				gen variable(
 						string(reinterpret_cast<const char *>(argument_1)),
-						&contexte);
+						contexte);
 				gen expression(
 						string(reinterpret_cast<const char *>(argument_2)),
-						&contexte);
+						contexte);
 
-				gen resultat = integrate_gen(expression, variable, &contexte);
+				gen resultat = integrate_gen(expression, variable,
+						contexte);
 				string chaine = "'" + resultat.print() + "'";
 
 				conversion_cas_vers_rpl(s_etat_processus,
@@ -588,8 +631,6 @@ interface_cas(struct_processus *s_etat_p
 
 			try
 			{
-				giac::context 	contexte;
-
 				int				direction;
 
 				if (argument_4 == NULL)
@@ -604,14 +645,14 @@ interface_cas(struct_processus *s_etat_p
 
 				gen expression(
 						string(reinterpret_cast<const char *>(argument_2)),
-						&contexte);
+						contexte);
 				identificateur variable(
 						string(reinterpret_cast<const char *>(argument_1)));
 				gen valeur(string(reinterpret_cast<const char *>
-						(argument_3)), &contexte);
+						(argument_3)), contexte);
 
 				gen resultat = limit(expression, variable, valeur, direction,
-						&contexte);
+						contexte);
 				string chaine = "'" + resultat.print() + "'";
 
 				conversion_cas_vers_rpl(s_etat_processus,