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 struct std_regs
  28   {
  29     char *name;
  30     int regnum;
  31   };
  32
  33 extern struct std_regs *std_regs;
  34 extern unsigned num_std_regs;
  35
  36 extern struct expression *expout;
  37 extern int expout_size;
  38 extern int expout_ptr;
  39
  40 /* If this is nonzero, this block is used as the lexical context
  41    for symbol names.  */
  42
  43 extern struct block *expression_context_block;
  44
  45 /* The innermost context required by the stack and register variables
  46    we've encountered so far. */
  47 extern struct block *innermost_block;
  48
  49 /* The block in which the most recently discovered symbol was found.
  50    FIXME: Should be declared along with lookup_symbol in symtab.h; is not
  51    related specifically to parsing.  */
  52 extern struct block *block_found;
  53
  54 /* Number of arguments seen so far in innermost function call.  */
  55 extern int arglist_len;
  56
  57 /* A string token, either a char-string or bit-string.  Char-strings are
  58    used, for example, for the names of symbols. */
  59
  60 struct stoken
  61   {
  62     /* Pointer to first byte of char-string or first bit of bit-string */
  63     char *ptr;
  64     /* Length of string in bytes for char-string or bits for bit-string */
  65     int length;
  66   };
  67
  68 struct ttype
  69   {
  70     struct stoken stoken;
  71     struct type *type;
  72   };
  73
  74 struct symtoken
  75   {
  76     struct stoken stoken;
  77     struct symbol *sym;
  78     int is_a_field_of_this;
  79   };
  80
  81 /* For parsing of complicated types.
  82    An array should be preceded in the list by the size of the array.  */
  83 enum type_pieces
  84   {
  85     tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function
  86   };
  87 /* The stack can contain either an enum type_pieces or an int.  */
  88 union type_stack_elt
  89   {
  90     enum type_pieces piece;
  91     int int_val;
  92   };
  93 extern union type_stack_elt *type_stack;
  94 extern int type_stack_depth, type_stack_size;
  95
  96 extern void write_exp_elt (union exp_element);
  97
  98 extern void write_exp_elt_opcode (enum exp_opcode);
  99
 100 extern void write_exp_elt_sym (struct symbol *);
 101
 102 extern void write_exp_elt_longcst (LONGEST);
 103
 104 extern void write_exp_elt_dblcst (DOUBLEST);
 105
 106 extern void write_exp_elt_type (struct type *);
 107
 108 extern void write_exp_elt_intern (struct internalvar *);
 109
 110 extern void write_exp_string (struct stoken);
 111
 112 extern void write_exp_bitstring (struct stoken);
 113
 114 extern void write_exp_elt_block (struct block *);
 115
 116 extern void write_exp_msymbol (struct minimal_symbol *,
 117                                struct type *, struct type *);
 118
 119 extern void write_dollar_variable (struct stoken str);
 120
 121 extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **,
 122                                                       int *, char **);
 123
 124 extern char *find_template_name_end (char *);
 125
 126 extern void start_arglist (void);
 127
 128 extern int end_arglist (void);
 129
 130 extern char *copy_name (struct stoken);
 131
 132 extern void push_type (enum type_pieces);
 133
 134 extern void push_type_int (int);
 135
 136 extern enum type_pieces pop_type (void);
 137
 138 extern int pop_type_int (void);
 139
 140 extern int length_of_subexp (struct expression *, int);
 141
 142 extern struct type *follow_types (struct type *);
 143
 144 /* During parsing of a C expression, the pointer to the next character
 145    is in this variable.  */
 146
 147 extern char *lexptr;
 148
 149 /* Tokens that refer to names do so with explicit pointer and length,
 150    so they can share the storage that lexptr is parsing.
 151
 152    When it is necessary to pass a name to a function that expects
 153    a null-terminated string, the substring is copied out
 154    into a block of storage that namecopy points to.
 155
 156    namecopy is allocated once, guaranteed big enough, for each parsing.  */
 157
 158 extern char *namecopy;
 159
 160 /* Current depth in parentheses within the expression.  */
 161
 162 extern int paren_depth;
 163
 164 /* Nonzero means stop parsing on first comma (if not within parentheses).  */
 165
 166 extern int comma_terminates;
 167 \f
 168 /* These codes indicate operator precedences for expression printing,
 169    least tightly binding first.  */
 170 /* Adding 1 to a precedence value is done for binary operators,
 171    on the operand which is more tightly bound, so that operators
 172    of equal precedence within that operand will get parentheses.  */
 173 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
 174    they are used as the "surrounding precedence" to force
 175    various kinds of things to be parenthesized.  */
 176 enum precedence
 177   {
 178     PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
 179     PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
 180     PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
 181     PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION
 182   };
 183
 184 /* Table mapping opcodes into strings for printing operators
 185    and precedences of the operators.  */
 186
 187 struct op_print
 188   {
 189     char *string;
 190     enum exp_opcode opcode;
 191     /* Precedence of operator.  These values are used only by comparisons.  */
 192     enum precedence precedence;
 193
 194     /* For a binary operator:  1 iff right associate.
 195        For a unary operator:  1 iff postfix. */
 196     int right_assoc;
 197   };
 198
 199 /* The generic method for targets to specify how their registers are
 200    named.  The mapping can be derived from three sources:
 201    REGISTER_NAME; std_regs; or a target specific alias hook. */
 202
 203 extern int target_map_name_to_register (char *, int);
 204
 205 #endif /* PARSER_DEFS_H */