Added multiple uBASIC program objects to stm32f4xx example port. (#995)

src/bacnet/basic/program/ubasic/ubasic.c

@@ -562,11 +562,15 @@ void ubasic_load_program(struct ubasic_data *data, const char *program)
     }
     data->status.byte = 0x00;
     if (program) {
-        data->program_ptr = program;
-        tokenizer_init(&data->tree, program);
+        data->program = program;
+    }
+    if (data->program) {
+        data->program_ptr = data->program;
+        tokenizer_init(&data->tree, data->program_ptr);
         data->status.bit.isRunning = 1;
     }
 }
+
 /*---------------------------------------------------------------------------*/
 static void
 token_error_print(struct ubasic_data *data, UBASIC_VARIABLE_TYPE token)
@@ -2809,7 +2813,7 @@ static void subsequent_statement(struct ubasic_data *data)
     return;
 }
 /*---------------------------------------------------------------------------*/
-static bool ubasic_program_finished(struct ubasic_data *data)
+bool ubasic_program_finished(struct ubasic_data *data)
 {
     struct ubasic_tokenizer *tree = &data->tree;
 
@@ -3015,6 +3019,29 @@ uint8_t ubasic_finished(struct ubasic_data *data)
     return (ubasic_program_finished(data) || data->status.bit.isRunning == 0);
 }
 
+void ubasic_halt_program(struct ubasic_data *data)
+{
+    data->status.bit.isRunning = 0;
+}
+
+const char *ubasic_program_location(struct ubasic_data *data)
+{
+    struct ubasic_tokenizer *tree = &data->tree;
+    char *statement_end;
+    if (tree->ptr) {
+        snprintf(data->location, sizeof(data->location), "%s", tree->ptr);
+        /* only return the statement until end-of-line */
+        statement_end = strpbrk(data->location, ";\n");
+        if (statement_end) {
+            *statement_end = 0;
+        }
+    } else {
+        snprintf(data->location, sizeof(data->location), "end");
+    }
+
+    return data->location;
+}
+
 /*---------------------------------------------------------------------------*/
 
 void ubasic_set_variable(

src/bacnet/basic/program/ubasic/ubasic.h

@@ -116,7 +116,12 @@ struct ubasic_data {
     int16_t free_arrayptr;
     int16_t arrayvariable[UBASIC_VARNUM_MAX];
 #endif
+    /* entire program */
+    const char *program;
+    /* points to current statement */
     const char *program_ptr;
+    /* copy of the current statement until end-of-line */
+    char location[UBASIC_STATEMENT_SIZE];
 
     uint16_t gosub_stack[UBASIC_GOSUB_STACK_DEPTH];
     uint8_t gosub_stack_ptr;
@@ -220,7 +225,13 @@ int32_t ubasic_run_program(struct ubasic_data *data);
 BACNET_STACK_EXPORT
 uint8_t ubasic_execute_statement(struct ubasic_data *data, char *statement);
 BACNET_STACK_EXPORT
+void ubasic_halt_program(struct ubasic_data *data);
+BACNET_STACK_EXPORT
+bool ubasic_program_finished(struct ubasic_data *data);
+BACNET_STACK_EXPORT
 uint8_t ubasic_finished(struct ubasic_data *data);
+BACNET_STACK_EXPORT
+const char *ubasic_program_location(struct ubasic_data *data);
 
 BACNET_STACK_EXPORT
 uint8_t ubasic_waiting_for_input(struct ubasic_data *data);