163 lines
4.5 KiB
C
163 lines
4.5 KiB
C
/* Parser definitions for GDB.
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Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
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Modified from expread.y by the Department of Computer Science at the
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State University of New York at Buffalo.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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struct std_regs {
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char *name;
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int regnum;
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};
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extern struct std_regs std_regs[];
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extern unsigned num_std_regs;
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struct expression *expout;
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int expout_size;
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int expout_ptr;
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extern struct type *init_type ();
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void write_exp_elt ();
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void write_exp_elt_opcode ();
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void write_exp_elt_sym ();
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void write_exp_elt_longcst ();
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void write_exp_elt_dblcst ();
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void write_exp_elt_type ();
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void write_exp_elt_intern ();
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void write_exp_string ();
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void start_arglist ();
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int end_arglist ();
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void free_funcalls ();
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char *copy_name ();
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/* If this is nonzero, this block is used as the lexical context
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for symbol names. */
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struct block *expression_context_block;
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/* The innermost context required by the stack and register variables
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we've encountered so far. */
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struct block *innermost_block;
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/* The block in which the most recently discovered symbol was found. */
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struct block *block_found;
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/* Number of arguments seen so far in innermost function call. */
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int arglist_len;
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/* Data structure for saving values of arglist_len
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for function calls whose arguments contain other function calls. */
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struct funcall
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{
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struct funcall *next;
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int arglist_len;
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};
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struct funcall *funcall_chain;
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/* This kind of datum is used to represent the name
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of a symbol token. */
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struct stoken
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{
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char *ptr;
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int length;
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};
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struct ttype
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{
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struct stoken stoken;
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struct type *type;
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};
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struct symtoken
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{
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struct stoken stoken;
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struct symbol *sym;
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int is_a_field_of_this;
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};
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/* For parsing of complicated types.
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An array should be preceded in the list by the size of the array. */
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enum type_pieces
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{tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function};
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/* The stack can contain either an enum type_pieces or an int. */
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union type_stack_elt {
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enum type_pieces piece;
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int int_val;
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};
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union type_stack_elt *type_stack;
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int type_stack_depth, type_stack_size;
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void push_type ();
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void push_type_int ();
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enum type_pieces pop_type ();
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int pop_type_int ();
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/* During parsing of a C expression, the pointer to the next character
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is in this variable. */
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char *lexptr;
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/* Tokens that refer to names do so with explicit pointer and length,
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so they can share the storage that lexptr is parsing.
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When it is necessary to pass a name to a function that expects
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a null-terminated string, the substring is copied out
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into a block of storage that namecopy points to.
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namecopy is allocated once, guaranteed big enough, for each parsing. */
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char *namecopy;
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/* Current depth in parentheses within the expression. */
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int paren_depth;
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/* Nonzero means stop parsing on first comma (if not within parentheses). */
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int comma_terminates;
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/* These codes indicate operator precedences for expression printing,
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least tightly binding first. */
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/* Adding 1 to a precedence value is done for binary operators,
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on the operand which is more tightly bound, so that operators
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of equal precedence within that operand will get parentheses. */
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/* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
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they are used as the "surrounding precedence" to force
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various kinds of things to be parenthesized. */
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enum precedence
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{ PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_OR, PREC_AND,
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PREC_LOGIOR, PREC_LOGAND, PREC_LOGXOR, PREC_EQUAL, PREC_ORDER,
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PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
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PREC_HYPER, PREC_PREFIX, PREC_SUFFIX };
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/* Table mapping opcodes into strings for printing operators
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and precedences of the operators. */
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struct op_print
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{
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char *string;
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enum exp_opcode opcode;
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/* Precedence of operator. These values are used only by comparisons. */
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enum precedence precedence;
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int right_assoc;
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};
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