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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #if !defined (PARSER_DEFS_H)
  23 #define PARSER_DEFS_H 1
  24
  25 struct std_regs {
  26         char *name;
  27         int regnum;
  28 };
  29
  30 extern struct std_regs std_regs[];
  31 extern unsigned num_std_regs;
  32
  33 struct expression *expout;
  34 int expout_size;
  35 int expout_ptr;
  36
  37 /* If this is nonzero, this block is used as the lexical context
  38    for symbol names.  */
  39
  40 struct block *expression_context_block;
  41
  42 /* The innermost context required by the stack and register variables
  43    we've encountered so far. */
  44 struct block *innermost_block;
  45
  46 /* The block in which the most recently discovered symbol was found. */
  47 struct block *block_found;
  48
  49 /* Number of arguments seen so far in innermost function call.  */
  50 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   {tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function};
  80 /* The stack can contain either an enum type_pieces or an int.  */
  81 union type_stack_elt {
  82   enum type_pieces piece;
  83   int int_val;
  84 };
  85 union type_stack_elt *type_stack;
  86 int type_stack_depth, type_stack_size;
  87
  88 extern void write_exp_elt PARAMS ((union exp_element));
  89
  90 extern void write_exp_elt_opcode PARAMS ((enum exp_opcode));
  91
  92 extern void write_exp_elt_sym PARAMS ((struct symbol *));
  93
  94 extern void write_exp_elt_longcst PARAMS ((LONGEST));
  95
  96 extern void write_exp_elt_dblcst PARAMS ((double));
  97
  98 extern void write_exp_elt_type PARAMS ((struct type *));
  99
 100 extern void write_exp_elt_intern PARAMS ((struct internalvar *));
 101
 102 extern void write_exp_string PARAMS ((struct stoken));
 103
 104 extern void write_exp_bitstring PARAMS ((struct stoken));
 105
 106 extern void write_exp_elt_block PARAMS ((struct block *));
 107
 108 extern void write_exp_msymbol PARAMS ((struct minimal_symbol *,
 109                                        struct type *, struct type *));
 110
 111 extern void
 112 start_arglist PARAMS ((void));
 113
 114 extern int
 115 end_arglist PARAMS ((void));
 116
 117 extern char *
 118 copy_name PARAMS ((struct stoken));
 119
 120 extern void
 121 push_type PARAMS ((enum type_pieces));
 122
 123 extern void
 124 push_type_int PARAMS ((int));
 125
 126 extern enum type_pieces
 127 pop_type PARAMS ((void));
 128
 129 extern int
 130 pop_type_int PARAMS ((void));
 131
 132 extern struct type *follow_types PARAMS ((struct type *));
 133
 134 /* During parsing of a C expression, the pointer to the next character
 135    is in this variable.  */
 136
 137 char *lexptr;
 138
 139 /* Tokens that refer to names do so with explicit pointer and length,
 140    so they can share the storage that lexptr is parsing.
 141
 142    When it is necessary to pass a name to a function that expects
 143    a null-terminated string, the substring is copied out
 144    into a block of storage that namecopy points to.
 145
 146    namecopy is allocated once, guaranteed big enough, for each parsing.  */
 147
 148 char *namecopy;
 149
 150 /* Current depth in parentheses within the expression.  */
 151
 152 int paren_depth;
 153
 154 /* Nonzero means stop parsing on first comma (if not within parentheses).  */
 155
 156 int comma_terminates;
 157 \f
 158 /* These codes indicate operator precedences for expression printing,
 159    least tightly binding first.  */
 160 /* Adding 1 to a precedence value is done for binary operators,
 161    on the operand which is more tightly bound, so that operators
 162    of equal precedence within that operand will get parentheses.  */
 163 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
 164    they are used as the "surrounding precedence" to force
 165    various kinds of things to be parenthesized.  */
 166 enum precedence
 167 { PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
 168   PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
 169   PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
 170   PREC_HYPER, PREC_PREFIX, PREC_SUFFIX };
 171
 172 /* Table mapping opcodes into strings for printing operators
 173    and precedences of the operators.  */
 174
 175 struct op_print
 176 {
 177   char *string;
 178   enum exp_opcode opcode;
 179   /* Precedence of operator.  These values are used only by comparisons.  */
 180   enum precedence precedence;
 181   int right_assoc;
 182 };
 183
 184 #endif  /* PARSER_DEFS_H */