gdb/parser-defs.h

   1 /* Parser definitions for GDB.
   2
   3    Copyright 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   4    1997, 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
   5
   6    Modified from expread.y by the Department of Computer Science at the
   7    State University of New York at Buffalo.
   8
   9    This file is part of GDB.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 59 Temple Place - Suite 330,
  24    Boston, MA 02111-1307, USA.  */
  25
  26 #if !defined (PARSER_DEFS_H)
  27 #define PARSER_DEFS_H 1
  28
  29 #include "doublest.h"
  30
  31 extern struct expression *expout;
  32 extern int expout_size;
  33 extern int expout_ptr;
  34
  35 /* If this is nonzero, this block is used as the lexical context
  36    for symbol names.  */
  37
  38 extern struct block *expression_context_block;
  39
  40 /* The innermost context required by the stack and register variables
  41    we've encountered so far. */
  42 extern struct block *innermost_block;
  43
  44 /* The block in which the most recently discovered symbol was found.
  45    FIXME: Should be declared along with lookup_symbol in symtab.h; is not
  46    related specifically to parsing.  */
  47 extern struct block *block_found;
  48
  49 /* Number of arguments seen so far in innermost function call.  */
  50 extern int arglist_len;
  51
  52 /* A string token, either a char-string or bit-string.  Char-strings are
  53    used, for example, for the names of symbols. */
  54
  55 struct stoken
  56   {
  57     /* Pointer to first byte of char-string or first bit of bit-string */
  58     char *ptr;
  59     /* Length of string in bytes for char-string or bits for bit-string */
  60     int length;
  61   };
  62
  63 struct ttype
  64   {
  65     struct stoken stoken;
  66     struct type *type;
  67   };
  68
  69 struct symtoken
  70   {
  71     struct stoken stoken;
  72     struct symbol *sym;
  73     int is_a_field_of_this;
  74   };
  75
  76 /* For parsing of complicated types.
  77    An array should be preceded in the list by the size of the array.  */
  78 enum type_pieces
  79   {
  80     tp_end = -1,
  81     tp_pointer,
  82     tp_reference,
  83     tp_array,
  84     tp_function,
  85     tp_const,
  86     tp_volatile,
  87     tp_space_identifier
  88   };
  89 /* The stack can contain either an enum type_pieces or an int.  */
  90 union type_stack_elt
  91   {
  92     enum type_pieces piece;
  93     int int_val;
  94   };
  95 extern union type_stack_elt *type_stack;
  96 extern int type_stack_depth, type_stack_size;
  97
  98 extern void write_exp_elt (union exp_element);
  99
 100 extern void write_exp_elt_opcode (enum exp_opcode);
 101
 102 extern void write_exp_elt_sym (struct symbol *);
 103
 104 extern void write_exp_elt_longcst (LONGEST);
 105
 106 extern void write_exp_elt_dblcst (DOUBLEST);
 107
 108 extern void write_exp_elt_type (struct type *);
 109
 110 extern void write_exp_elt_intern (struct internalvar *);
 111
 112 extern void write_exp_string (struct stoken);
 113
 114 extern void write_exp_bitstring (struct stoken);
 115
 116 extern void write_exp_elt_block (struct block *);
 117
 118 extern void write_exp_msymbol (struct minimal_symbol *,
 119                                struct type *, struct type *);
 120
 121 extern void write_dollar_variable (struct stoken str);
 122
 123 extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **,
 124                                                       int *, char **);
 125
 126 extern char *find_template_name_end (char *);
 127
 128 extern void start_arglist (void);
 129
 130 extern int end_arglist (void);
 131
 132 extern char *copy_name (struct stoken);
 133
 134 extern void push_type (enum type_pieces);
 135
 136 extern void push_type_int (int);
 137
 138 extern void push_type_address_space (char *);
 139
 140 extern enum type_pieces pop_type (void);
 141
 142 extern int pop_type_int (void);
 143
 144 extern int length_of_subexp (struct expression *, int);
 145
 146 extern struct type *follow_types (struct type *);
 147
 148 /* During parsing of a C expression, the pointer to the next character
 149    is in this variable.  */
 150
 151 extern char *lexptr;
 152
 153 /* After a token has been recognized, this variable points to it.
 154    Currently used only for error reporting.  */
 155 extern char *prev_lexptr;
 156
 157 /* Tokens that refer to names do so with explicit pointer and length,
 158    so they can share the storage that lexptr is parsing.
 159
 160    When it is necessary to pass a name to a function that expects
 161    a null-terminated string, the substring is copied out
 162    into a block of storage that namecopy points to.
 163
 164    namecopy is allocated once, guaranteed big enough, for each parsing.  */
 165
 166 extern char *namecopy;
 167
 168 /* Current depth in parentheses within the expression.  */
 169
 170 extern int paren_depth;
 171
 172 /* Nonzero means stop parsing on first comma (if not within parentheses).  */
 173
 174 extern int comma_terminates;
 175 \f
 176 /* These codes indicate operator precedences for expression printing,
 177    least tightly binding first.  */
 178 /* Adding 1 to a precedence value is done for binary operators,
 179    on the operand which is more tightly bound, so that operators
 180    of equal precedence within that operand will get parentheses.  */
 181 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
 182    they are used as the "surrounding precedence" to force
 183    various kinds of things to be parenthesized.  */
 184 enum precedence
 185   {
 186     PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
 187     PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
 188     PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
 189     PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION
 190   };
 191
 192 /* Table mapping opcodes into strings for printing operators
 193    and precedences of the operators.  */
 194
 195 struct op_print
 196   {
 197     char *string;
 198     enum exp_opcode opcode;
 199     /* Precedence of operator.  These values are used only by comparisons.  */
 200     enum precedence precedence;
 201
 202     /* For a binary operator:  1 iff right associate.
 203        For a unary operator:  1 iff postfix. */
 204     int right_assoc;
 205   };
 206
 207 /* The generic method for targets to specify how their registers are
 208    named.  The mapping can be derived from two sources: REGISTER_NAME;
 209    and builtin regs. */
 210
 211 extern int target_map_name_to_register (char *, int);
 212
 213 #endif /* PARSER_DEFS_H */