gdb/parser-defs.h

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