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
 109 start_arglist PARAMS ((void));
 110
 111 extern int
 112 end_arglist PARAMS ((void));
 113
 114 extern char *
 115 copy_name PARAMS ((struct stoken));
 116
 117 extern void
 118 push_type PARAMS ((enum type_pieces));
 119
 120 extern void
 121 push_type_int PARAMS ((int));
 122
 123 extern enum type_pieces
 124 pop_type PARAMS ((void));
 125
 126 extern int
 127 pop_type_int PARAMS ((void));
 128
 129 extern struct type *follow_types PARAMS ((struct type *));
 130
 131 /* During parsing of a C expression, the pointer to the next character
 132    is in this variable.  */
 133
 134 char *lexptr;
 135
 136 /* Tokens that refer to names do so with explicit pointer and length,
 137    so they can share the storage that lexptr is parsing.
 138
 139    When it is necessary to pass a name to a function that expects
 140    a null-terminated string, the substring is copied out
 141    into a block of storage that namecopy points to.
 142
 143    namecopy is allocated once, guaranteed big enough, for each parsing.  */
 144
 145 char *namecopy;
 146
 147 /* Current depth in parentheses within the expression.  */
 148
 149 int paren_depth;
 150
 151 /* Nonzero means stop parsing on first comma (if not within parentheses).  */
 152
 153 int comma_terminates;
 154 \f
 155 /* These codes indicate operator precedences for expression printing,
 156    least tightly binding first.  */
 157 /* Adding 1 to a precedence value is done for binary operators,
 158    on the operand which is more tightly bound, so that operators
 159    of equal precedence within that operand will get parentheses.  */
 160 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
 161    they are used as the "surrounding precedence" to force
 162    various kinds of things to be parenthesized.  */
 163 enum precedence
 164 { PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
 165   PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
 166   PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
 167   PREC_HYPER, PREC_PREFIX, PREC_SUFFIX };
 168
 169 /* Table mapping opcodes into strings for printing operators
 170    and precedences of the operators.  */
 171
 172 struct op_print
 173 {
 174   char *string;
 175   enum exp_opcode opcode;
 176   /* Precedence of operator.  These values are used only by comparisons.  */
 177   enum precedence precedence;
 178   int right_assoc;
 179 };
 180
 181 #endif  /* PARSER_DEFS_H */