/* Parser definitions for GDB.
- Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2002, 2007, 2008, 2009, 2010
- Free Software Foundation, Inc.
+ Copyright (C) 1986, 1989-2000, 2002, 2007-2012 Free Software
+ Foundation, Inc.
Modified from expread.y by the Department of Computer Science at the
State University of New York at Buffalo.
extern CORE_ADDR expression_context_pc;
/* The innermost context required by the stack and register variables
- we've encountered so far. */
+ we've encountered so far. */
extern struct block *innermost_block;
/* The block in which the most recently discovered symbol was found.
extern int arglist_len;
/* A string token, either a char-string or bit-string. Char-strings are
- used, for example, for the names of symbols. */
+ used, for example, for the names of symbols. */
struct stoken
{
- /* Pointer to first byte of char-string or first bit of bit-string */
+ /* Pointer to first byte of char-string or first bit of bit-string. */
char *ptr;
- /* Length of string in bytes for char-string or bits for bit-string */
+ /* Length of string in bytes for char-string or bits for bit-string. */
int length;
};
{
/* A language-specific type field. */
int type;
- /* Pointer to first byte of char-string or first bit of bit-string */
+ /* Pointer to first byte of char-string or first bit of bit-string. */
char *ptr;
- /* Length of string in bytes for char-string or bits for bit-string */
+ /* Length of string in bytes for char-string or bits for bit-string. */
int length;
};
tp_function,
tp_const,
tp_volatile,
- tp_space_identifier
+ tp_space_identifier,
+ tp_type_stack
};
/* The stack can contain either an enum type_pieces or an int. */
union type_stack_elt
{
enum type_pieces piece;
int int_val;
+ struct type_stack *stack_val;
};
-extern union type_stack_elt *type_stack;
-extern int type_stack_depth, type_stack_size;
-extern void write_exp_elt (union exp_element);
+/* The type stack is an instance of this structure. */
+
+struct type_stack
+{
+ /* Elements on the stack. */
+ union type_stack_elt *elements;
+ /* Current stack depth. */
+ int depth;
+ /* Allocated size of stack. */
+ int size;
+};
+
+/* Helper function to initialize the expout, expout_size, expout_ptr
+ trio before it is used to store expression elements created during
+ the parsing of an expression. INITIAL_SIZE is the initial size of
+ the expout array. LANG is the language used to parse the expression.
+ And GDBARCH is the gdbarch to use during parsing. */
+
+extern void initialize_expout (int, const struct language_defn *,
+ struct gdbarch *);
+
+/* Helper function that frees any unsed space in the expout array.
+ It is generally used when the parser has just been parsed and
+ created. */
+
+extern void reallocate_expout (void);
+
+/* Reverse an expression from suffix form (in which it is constructed)
+ to prefix form (in which we can conveniently print or execute it).
+ Ordinarily this always returns -1. However, if EXPOUT_LAST_STRUCT
+ is not -1 (i.e., we are trying to complete a field name), it will
+ return the index of the subexpression which is the left-hand-side
+ of the struct operation at EXPOUT_LAST_STRUCT. */
+
+extern int prefixify_expression (struct expression *expr);
extern void write_exp_elt_opcode (enum exp_opcode);
extern char *copy_name (struct stoken);
+extern void insert_type (enum type_pieces);
+
extern void push_type (enum type_pieces);
extern void push_type_int (int);
-extern void push_type_address_space (char *);
+extern void insert_type_address_space (char *);
extern enum type_pieces pop_type (void);
extern int pop_type_int (void);
+extern struct type_stack *get_type_stack (void);
+
+extern struct type_stack *append_type_stack (struct type_stack *to,
+ struct type_stack *from);
+
+extern void push_type_stack (struct type_stack *stack);
+
+extern void type_stack_cleanup (void *arg);
+
extern int length_of_subexp (struct expression *, int);
extern int dump_subexp (struct expression *, struct ui_file *, int);
extern int dump_subexp_body_standard (struct expression *,
struct ui_file *, int);
-extern void operator_length (struct expression *, int, int *, int *);
+extern void operator_length (const struct expression *, int, int *, int *);
-extern void operator_length_standard (struct expression *, int, int *, int *);
+extern void operator_length_standard (const struct expression *, int, int *,
+ int *);
extern int operator_check_standard (struct expression *exp, int pos,
int (*objfile_func)
extern void null_post_parser (struct expression **, int);
+extern int parse_float (const char *p, int len, DOUBLEST *d,
+ const char **suffix);
+
+extern int parse_c_float (struct gdbarch *gdbarch, const char *p, int len,
+ DOUBLEST *d, struct type **t);
+
/* During parsing of a C expression, the pointer to the next character
is in this variable. */
extern char *lexptr;
-/* After a token has been recognized, this variable points to it.
+/* After a token has been recognized, this variable points to it.
Currently used only for error reporting. */
extern char *prev_lexptr;
-/* Tokens that refer to names do so with explicit pointer and length,
- so they can share the storage that lexptr is parsing.
-
- When it is necessary to pass a name to a function that expects
- a null-terminated string, the substring is copied out
- into a block of storage that namecopy points to.
-
- namecopy is allocated once, guaranteed big enough, for each parsing. */
-
-extern char *namecopy;
-
/* Current depth in parentheses within the expression. */
extern int paren_depth;
enum precedence precedence;
/* For a binary operator: 1 iff right associate.
- For a unary operator: 1 iff postfix. */
+ For a unary operator: 1 iff postfix. */
int right_assoc;
};
/* Returns number of exp_elements needed to represent an operator and
the number of subexpressions it takes. */
- void (*operator_length) (struct expression*, int, int*, int *);
+ void (*operator_length) (const struct expression*, int, int*, int *);
/* Call TYPE_FUNC and OBJFILE_FUNC for any TYPE and OBJFILE found being
referenced by the single operator of EXP at position POS. Operator
projects / deliverable / binutils-gdb.git / blobdiff