gdb/parser-defs.h

   1 /* Parser definitions for GDB.
   2    Copyright 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
   3    1998, 1999, 2000 Free Software Foundation, Inc.
   4    Modified from expread.y by the Department of Computer Science at the
   5    State University of New York at Buffalo.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #if !defined (PARSER_DEFS_H)
  25 #define PARSER_DEFS_H 1
  26
  27 #include "doublest.h"
  28
  29 struct std_regs
  30   {
  31     char *name;
  32     int regnum;
  33   };
  34
  35 extern struct std_regs *std_regs;
  36 extern unsigned num_std_regs;
  37
  38 extern struct expression *expout;
  39 extern int expout_size;
  40 extern int expout_ptr;
  41
  42 /* If this is nonzero, this block is used as the lexical context
  43    for symbol names.  */
  44
  45 extern struct block *expression_context_block;
  46
  47 /* The innermost context required by the stack and register variables
  48    we've encountered so far. */
  49 extern struct block *innermost_block;
  50
  51 /* The block in which the most recently discovered symbol was found.
  52    FIXME: Should be declared along with lookup_symbol in symtab.h; is not
  53    related specifically to parsing.  */
  54 extern struct block *block_found;
  55
  56 /* Number of arguments seen so far in innermost function call.  */
  57 extern int arglist_len;
  58
  59 /* A string token, either a char-string or bit-string.  Char-strings are
  60    used, for example, for the names of symbols. */
  61
  62 struct stoken
  63   {
  64     /* Pointer to first byte of char-string or first bit of bit-string */
  65     char *ptr;
  66     /* Length of string in bytes for char-string or bits for bit-string */
  67     int length;
  68   };
  69
  70 struct ttype
  71   {
  72     struct stoken stoken;
  73     struct type *type;
  74   };
  75
  76 struct symtoken
  77   {
  78     struct stoken stoken;
  79     struct symbol *sym;
  80     int is_a_field_of_this;
  81   };
  82
  83 /* For parsing of complicated types.
  84    An array should be preceded in the list by the size of the array.  */
  85 enum type_pieces
  86   {
  87     tp_end = -1,
  88     tp_pointer,
  89     tp_reference,
  90     tp_array,
  91     tp_function,
  92     tp_const,
  93     tp_volatile,
  94     tp_space_identifier
  95   };
  96 /* The stack can contain either an enum type_pieces or an int.  */
  97 union type_stack_elt
  98   {
  99     enum type_pieces piece;
 100     int int_val;
 101   };
 102 extern union type_stack_elt *type_stack;
 103 extern int type_stack_depth, type_stack_size;
 104
 105 extern void write_exp_elt (union exp_element);
 106
 107 extern void write_exp_elt_opcode (enum exp_opcode);
 108
 109 extern void write_exp_elt_sym (struct symbol *);
 110
 111 extern void write_exp_elt_longcst (LONGEST);
 112
 113 extern void write_exp_elt_dblcst (DOUBLEST);
 114
 115 extern void write_exp_elt_type (struct type *);
 116
 117 extern void write_exp_elt_intern (struct internalvar *);
 118
 119 extern void write_exp_string (struct stoken);
 120
 121 extern void write_exp_bitstring (struct stoken);
 122
 123 extern void write_exp_elt_block (struct block *);
 124
 125 extern void write_exp_msymbol (struct minimal_symbol *,
 126                                struct type *, struct type *);
 127
 128 extern void write_dollar_variable (struct stoken str);
 129
 130 extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **,
 131                                                       int *, char **);
 132
 133 extern char *find_template_name_end (char *);
 134
 135 extern void start_arglist (void);
 136
 137 extern int end_arglist (void);
 138
 139 extern char *copy_name (struct stoken);
 140
 141 extern void push_type (enum type_pieces);
 142
 143 extern void push_type_int (int);
 144
 145 extern void push_type_address_space (char *);
 146
 147 extern enum type_pieces pop_type (void);
 148
 149 extern int pop_type_int (void);
 150
 151 extern int length_of_subexp (struct expression *, int);
 152
 153 extern struct type *follow_types (struct type *);
 154
 155 /* During parsing of a C expression, the pointer to the next character
 156    is in this variable.  */
 157
 158 extern char *lexptr;
 159
 160 /* Tokens that refer to names do so with explicit pointer and length,
 161    so they can share the storage that lexptr is parsing.
 162
 163    When it is necessary to pass a name to a function that expects
 164    a null-terminated string, the substring is copied out
 165    into a block of storage that namecopy points to.
 166
 167    namecopy is allocated once, guaranteed big enough, for each parsing.  */
 168
 169 extern char *namecopy;
 170
 171 /* Current depth in parentheses within the expression.  */
 172
 173 extern int paren_depth;
 174
 175 /* Nonzero means stop parsing on first comma (if not within parentheses).  */
 176
 177 extern int comma_terminates;
 178 \f
 179 /* These codes indicate operator precedences for expression printing,
 180    least tightly binding first.  */
 181 /* Adding 1 to a precedence value is done for binary operators,
 182    on the operand which is more tightly bound, so that operators
 183    of equal precedence within that operand will get parentheses.  */
 184 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
 185    they are used as the "surrounding precedence" to force
 186    various kinds of things to be parenthesized.  */
 187 enum precedence
 188   {
 189     PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
 190     PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
 191     PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
 192     PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION
 193   };
 194
 195 /* Table mapping opcodes into strings for printing operators
 196    and precedences of the operators.  */
 197
 198 struct op_print
 199   {
 200     char *string;
 201     enum exp_opcode opcode;
 202     /* Precedence of operator.  These values are used only by comparisons.  */
 203     enum precedence precedence;
 204
 205     /* For a binary operator:  1 iff right associate.
 206        For a unary operator:  1 iff postfix. */
 207     int right_assoc;
 208   };
 209
 210 /* The generic method for targets to specify how their registers are
 211    named.  The mapping can be derived from three sources:
 212    REGISTER_NAME; std_regs; or a target specific alias hook. */
 213
 214 extern int target_map_name_to_register (char *, int);
 215
 216 #endif /* PARSER_DEFS_H */