/* GDB variable objects API.
- Copyright (C) 1999-2013 Free Software Foundation, Inc.
+ Copyright (C) 1999-2014 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
/* String representations of gdb's format codes (defined in varobj.c). */
extern char *varobj_format_string[];
-/* Languages supported by this variable objects system. This enum is used
- to index arrays so we make its first enum explicitly zero. */
-enum varobj_languages
- {
- vlang_c = 0, vlang_cplus, vlang_java, vlang_ada, vlang_end
- };
-
-/* String representations of gdb's known languages (defined in varobj.c). */
-extern char *varobj_language_string[];
-
/* Struct thar describes a variable object instance. */
+
struct varobj;
typedef struct varobj *varobj_p;
DEF_VEC_O (varobj_update_result);
+struct varobj_root;
+struct varobj_dynamic;
+
+/* Every variable in the system has a structure of this type defined
+ for it. This structure holds all information necessary to manipulate
+ a particular object variable. Members which must be freed are noted. */
+struct varobj
+{
+ /* Alloc'd name of the variable for this object. If this variable is a
+ child, then this name will be the child's source name.
+ (bar, not foo.bar). */
+ /* NOTE: This is the "expression". */
+ char *name;
+
+ /* Alloc'd expression for this child. Can be used to create a
+ root variable corresponding to this child. */
+ char *path_expr;
+
+ /* The alloc'd name for this variable's object. This is here for
+ convenience when constructing this object's children. */
+ char *obj_name;
+
+ /* Index of this variable in its parent or -1. */
+ int index;
+
+ /* The type of this variable. This can be NULL
+ for artifial variable objects -- currently, the "accessibility"
+ variable objects in C++. */
+ struct type *type;
+
+ /* The value of this expression or subexpression. A NULL value
+ indicates there was an error getting this value.
+ Invariant: if varobj_value_is_changeable_p (this) is non-zero,
+ the value is either NULL, or not lazy. */
+ struct value *value;
+
+ /* The number of (immediate) children this variable has. */
+ int num_children;
+
+ /* If this object is a child, this points to its immediate parent. */
+ struct varobj *parent;
+
+ /* Children of this object. */
+ VEC (varobj_p) *children;
+
+ /* Description of the root variable. Points to root variable for
+ children. */
+ struct varobj_root *root;
+
+ /* The format of the output for this object. */
+ enum varobj_display_formats format;
+
+ /* Was this variable updated via a varobj_set_value operation. */
+ int updated;
+
+ /* Last print value. */
+ char *print_value;
+
+ /* Is this variable frozen. Frozen variables are never implicitly
+ updated by -var-update *
+ or -var-update <direct-or-indirect-parent>. */
+ int frozen;
+
+ /* Is the value of this variable intentionally not fetched? It is
+ not fetched if either the variable is frozen, or any parents is
+ frozen. */
+ int not_fetched;
+
+ /* Sub-range of children which the MI consumer has requested. If
+ FROM < 0 or TO < 0, means that all children have been
+ requested. */
+ int from;
+ int to;
+
+ /* Dynamic part of varobj. */
+ struct varobj_dynamic *dynamic;
+};
+
+/* Is the variable X one of our "fake" children? */
+#define CPLUS_FAKE_CHILD(x) \
+((x) != NULL && (x)->type == NULL && (x)->value == NULL)
+
+/* The language specific vector */
+
+struct lang_varobj_ops
+{
+ /* The number of children of PARENT. */
+ int (*number_of_children) (struct varobj *parent);
+
+ /* The name (expression) of a root varobj. */
+ char *(*name_of_variable) (struct varobj *parent);
+
+ /* The name of the INDEX'th child of PARENT. */
+ char *(*name_of_child) (struct varobj *parent, int index);
+
+ /* Returns the rooted expression of CHILD, which is a variable
+ obtain that has some parent. */
+ char *(*path_expr_of_child) (struct varobj *child);
+
+ /* The ``struct value *'' of the INDEX'th child of PARENT. */
+ struct value *(*value_of_child) (struct varobj *parent, int index);
+
+ /* The type of the INDEX'th child of PARENT. */
+ struct type *(*type_of_child) (struct varobj *parent, int index);
+
+ /* The current value of VAR. */
+ char *(*value_of_variable) (struct varobj *var,
+ enum varobj_display_formats format);
+
+ /* Return non-zero if changes in value of VAR must be detected and
+ reported by -var-update. Return zero if -var-update should never
+ report changes of such values. This makes sense for structures
+ (since the changes in children values will be reported separately),
+ or for artifical objects (like 'public' pseudo-field in C++).
+
+ Return value of 0 means that gdb need not call value_fetch_lazy
+ for the value of this variable object. */
+ int (*value_is_changeable_p) (struct varobj *var);
+
+ /* Return nonzero if the type of VAR has mutated.
+
+ VAR's value is still the varobj's previous value, while NEW_VALUE
+ is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE
+ may be NULL indicating that there is no value available (the varobj
+ may be out of scope, of may be the child of a null pointer, for
+ instance). NEW_TYPE, on the other hand, must never be NULL.
+
+ This function should also be able to assume that var's number of
+ children is set (not < 0).
+
+ Languages where types do not mutate can set this to NULL. */
+ int (*value_has_mutated) (struct varobj *var, struct value *new_value,
+ struct type *new_type);
+};
+
+extern const struct lang_varobj_ops c_varobj_ops;
+extern const struct lang_varobj_ops cplus_varobj_ops;
+extern const struct lang_varobj_ops java_varobj_ops;
+extern const struct lang_varobj_ops ada_varobj_ops;
+
+#define default_varobj_ops c_varobj_ops
/* API functions */
extern struct varobj *varobj_create (char *objname,
extern char *varobj_get_path_expr (struct varobj *var);
-extern enum varobj_languages varobj_get_language (struct varobj *var);
+extern const struct language_defn *varobj_get_language (struct varobj *var);
extern int varobj_get_attributes (struct varobj *var);
extern int varobj_pretty_printed_p (struct varobj *var);
+extern int varobj_default_value_is_changeable_p (struct varobj *var);
+extern int varobj_value_is_changeable_p (struct varobj *var);
+
+extern struct type *varobj_get_value_type (struct varobj *var);
+
+extern int varobj_is_anonymous_child (struct varobj *child);
+
+extern struct varobj *varobj_get_path_expr_parent (struct varobj *var);
+
+extern char *varobj_value_get_print_value (struct value *value,
+ enum varobj_display_formats format,
+ struct varobj *var);
+
+extern void varobj_formatted_print_options (struct value_print_options *opts,
+ enum varobj_display_formats format);
+
+extern void varobj_restrict_range (VEC (varobj_p) *children, int *from,
+ int *to);
#endif /* VAROBJ_H */
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