| 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 */ |