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 PARAMS ((union exp_element));
  96
  97 extern void write_exp_elt_opcode PARAMS ((enum exp_opcode));
  98
  99 extern void write_exp_elt_sym PARAMS ((struct symbol *));
 100
 101 extern void write_exp_elt_longcst PARAMS ((LONGEST));
 102
 103 extern void write_exp_elt_dblcst PARAMS ((DOUBLEST));
 104
 105 extern void write_exp_elt_type PARAMS ((struct type *));
 106
 107 extern void write_exp_elt_intern PARAMS ((struct internalvar *));
 108
 109 extern void write_exp_string PARAMS ((struct stoken));
 110
 111 extern void write_exp_bitstring PARAMS ((struct stoken));
 112
 113 extern void write_exp_elt_block PARAMS ((struct block *));
 114
 115 extern void write_exp_msymbol PARAMS ((struct minimal_symbol *,
 116                                        struct type *, struct type *));
 117
 118 extern void write_dollar_variable PARAMS ((struct stoken str));
 119
 120 extern struct symbol *parse_nested_classes_for_hpacc PARAMS ((char *, int, char **, int *, char **));
 121
 122 extern char *find_template_name_end PARAMS ((char *));
 123
 124 extern void
 125 start_arglist PARAMS ((void));
 126
 127 extern int
 128 end_arglist PARAMS ((void));
 129
 130 extern char *
 131   copy_name PARAMS ((struct stoken));
 132
 133 extern void
 134 push_type PARAMS ((enum type_pieces));
 135
 136 extern void
 137 push_type_int PARAMS ((int));
 138
 139 extern enum type_pieces
 140 pop_type PARAMS ((void));
 141
 142 extern int
 143 pop_type_int PARAMS ((void));
 144
 145 extern int
 146 length_of_subexp PARAMS ((struct expression *, int));
 147
 148 extern struct type *follow_types PARAMS ((struct type *));
 149
 150 /* During parsing of a C expression, the pointer to the next character
 151    is in this variable.  */
 152
 153 extern char *lexptr;
 154
 155 /* Tokens that refer to names do so with explicit pointer and length,
 156    so they can share the storage that lexptr is parsing.
 157
 158    When it is necessary to pass a name to a function that expects
 159    a null-terminated string, the substring is copied out
 160    into a block of storage that namecopy points to.
 161
 162    namecopy is allocated once, guaranteed big enough, for each parsing.  */
 163
 164 extern char *namecopy;
 165
 166 /* Current depth in parentheses within the expression.  */
 167
 168 extern int paren_depth;
 169
 170 /* Nonzero means stop parsing on first comma (if not within parentheses).  */
 171
 172 extern int comma_terminates;
 173 \f
 174 /* These codes indicate operator precedences for expression printing,
 175    least tightly binding first.  */
 176 /* Adding 1 to a precedence value is done for binary operators,
 177    on the operand which is more tightly bound, so that operators
 178    of equal precedence within that operand will get parentheses.  */
 179 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
 180    they are used as the "surrounding precedence" to force
 181    various kinds of things to be parenthesized.  */
 182 enum precedence
 183   {
 184     PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
 185     PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
 186     PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
 187     PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION
 188   };
 189
 190 /* Table mapping opcodes into strings for printing operators
 191    and precedences of the operators.  */
 192
 193 struct op_print
 194   {
 195     char *string;
 196     enum exp_opcode opcode;
 197     /* Precedence of operator.  These values are used only by comparisons.  */
 198     enum precedence precedence;
 199
 200     /* For a binary operator:  1 iff right associate.
 201        For a unary operator:  1 iff postfix. */
 202     int right_assoc;
 203   };
 204
 205 /* The generic method for targets to specify how their registers are
 206    named.  The mapping can be derived from three sources:
 207    REGISTER_NAME; std_regs; or a target specific alias hook. */
 208
 209 extern int target_map_name_to_register PARAMS ((char *, int));
 210
 211 #endif /* PARSER_DEFS_H */