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Diffstat (limited to 'contrib/gdb/gdb/parser-defs.h')
| -rw-r--r-- | contrib/gdb/gdb/parser-defs.h | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/parser-defs.h b/contrib/gdb/gdb/parser-defs.h new file mode 100644 index 0000000..c84fcad --- /dev/null +++ b/contrib/gdb/gdb/parser-defs.h @@ -0,0 +1,279 @@ +/* Parser definitions for GDB. + + Copyright 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, + 1997, 1998, 1999, 2000, 2002 Free Software Foundation, Inc. + + Modified from expread.y by the Department of Computer Science at the + State University of New York at Buffalo. + + This file is part of GDB. + + 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 + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#if !defined (PARSER_DEFS_H) +#define PARSER_DEFS_H 1 + +#include "doublest.h" + +struct block; + +extern struct expression *expout; +extern int expout_size; +extern int expout_ptr; + +/* If this is nonzero, this block is used as the lexical context + for symbol names. */ + +extern struct block *expression_context_block; + +/* If expression_context_block is non-zero, then this is the PC within + the block that we want to evaluate expressions at. When debugging + C or C++ code, we use this to find the exact line we're at, and + then look up the macro definitions active at that point. */ +extern CORE_ADDR expression_context_pc; + +/* The innermost context required by the stack and register variables + we've encountered so far. */ +extern struct block *innermost_block; + +/* The block in which the most recently discovered symbol was found. + FIXME: Should be declared along with lookup_symbol in symtab.h; is not + related specifically to parsing. */ +extern struct block *block_found; + +/* Number of arguments seen so far in innermost function call. */ +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. */ + +struct stoken + { + /* 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 */ + int length; + }; + +struct ttype + { + struct stoken stoken; + struct type *type; + }; + +struct symtoken + { + struct stoken stoken; + struct symbol *sym; + int is_a_field_of_this; + }; + +struct objc_class_str + { + struct stoken stoken; + struct type *type; + int class; + }; + + +/* For parsing of complicated types. + An array should be preceded in the list by the size of the array. */ +enum type_pieces + { + tp_end = -1, + tp_pointer, + tp_reference, + tp_array, + tp_function, + tp_const, + tp_volatile, + tp_space_identifier + }; +/* The stack can contain either an enum type_pieces or an int. */ +union type_stack_elt + { + enum type_pieces piece; + int int_val; + }; +extern union type_stack_elt *type_stack; +extern int type_stack_depth, type_stack_size; + +extern void write_exp_elt (union exp_element); + +extern void write_exp_elt_opcode (enum exp_opcode); + +extern void write_exp_elt_sym (struct symbol *); + +extern void write_exp_elt_longcst (LONGEST); + +extern void write_exp_elt_dblcst (DOUBLEST); + +extern void write_exp_elt_type (struct type *); + +extern void write_exp_elt_intern (struct internalvar *); + +extern void write_exp_string (struct stoken); + +extern void write_exp_bitstring (struct stoken); + +extern void write_exp_elt_block (struct block *); + +extern void write_exp_msymbol (struct minimal_symbol *, + struct type *, struct type *); + +extern void write_dollar_variable (struct stoken str); + +extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **, + int *, char **); + +extern char *find_template_name_end (char *); + +extern void start_arglist (void); + +extern int end_arglist (void); + +extern char *copy_name (struct stoken); + +extern void push_type (enum type_pieces); + +extern void push_type_int (int); + +extern void push_type_address_space (char *); + +extern enum type_pieces pop_type (void); + +extern int pop_type_int (void); + +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_standard (struct expression *, int, int *, int *); + +extern char *op_name_standard (enum exp_opcode); + +extern struct type *follow_types (struct type *); + +/* 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. + 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; + +/* Nonzero means stop parsing on first comma (if not within parentheses). */ + +extern int comma_terminates; + +/* These codes indicate operator precedences for expression printing, + least tightly binding first. */ +/* Adding 1 to a precedence value is done for binary operators, + on the operand which is more tightly bound, so that operators + of equal precedence within that operand will get parentheses. */ +/* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator; + they are used as the "surrounding precedence" to force + various kinds of things to be parenthesized. */ +enum precedence + { + PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR, + PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR, + PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT, + PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION + }; + +/* Table mapping opcodes into strings for printing operators + and precedences of the operators. */ + +struct op_print + { + char *string; + enum exp_opcode opcode; + /* Precedence of operator. These values are used only by comparisons. */ + enum precedence precedence; + + /* For a binary operator: 1 iff right associate. + For a unary operator: 1 iff postfix. */ + int right_assoc; + }; + +/* Information needed to print, prefixify, and evaluate expressions for + a given language. */ + +struct exp_descriptor + { + /* Print subexpression. */ + void (*print_subexp) (struct expression *, int *, struct ui_file *, + enum precedence); + + /* 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 *); + + /* Name of this operator for dumping purposes. */ + char *(*op_name) (enum exp_opcode); + + /* Dump the rest of this (prefix) expression after the operator + itself has been printed. See dump_subexp_body_standard in + (expprint.c). */ + int (*dump_subexp_body) (struct expression *, struct ui_file *, int); + + /* Evaluate an expression. */ + struct value *(*evaluate_exp) (struct type *, struct expression *, + int *, enum noside); + }; + + +/* Default descriptor containing standard definitions of all + elements. */ +extern const struct exp_descriptor exp_descriptor_standard; + +/* Functions used by language-specific extended operators to (recursively) + print/dump subexpressions. */ + +extern void print_subexp (struct expression *, int *, struct ui_file *, + enum precedence); + +extern void print_subexp_standard (struct expression *, int *, + struct ui_file *, enum precedence); + +/* Function used to avoid direct calls to fprintf + in the code generated by the bison parser. */ + +extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf, 2 ,3); + +#endif /* PARSER_DEFS_H */ |
