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, Boston, MA 02111-1307, 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 extern struct expression *expout; 34 extern int expout_size; 35 extern int expout_ptr; 36 37 /* If this is nonzero, this block is used as the lexical context 38 for symbol names. */ 39 40 extern struct block *expression_context_block; 41 42 /* The innermost context required by the stack and register variables 43 we've encountered so far. */ 44 extern struct block *innermost_block; 45 46 /* The block in which the most recently discovered symbol was found. 47 FIXME: Should be declared along with lookup_symbol in symtab.h; is not 48 related specifically to parsing. */ 49 extern struct block *block_found; 50 51 /* Number of arguments seen so far in innermost function call. */ 52 extern int arglist_len; 53 54 /* A string token, either a char-string or bit-string. Char-strings are 55 used, for example, for the names of symbols. */ 56 57 struct stoken 58 { 59 /* Pointer to first byte of char-string or first bit of bit-string */ 60 char *ptr; 61 /* Length of string in bytes for char-string or bits for bit-string */ 62 int length; 63 }; 64 65 struct ttype 66 { 67 struct stoken stoken; 68 struct type *type; 69 }; 70 71 struct symtoken 72 { 73 struct stoken stoken; 74 struct symbol *sym; 75 int is_a_field_of_this; 76 }; 77 78 /* For parsing of complicated types. 79 An array should be preceded in the list by the size of the array. */ 80 enum type_pieces 81 {tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function}; 82 /* The stack can contain either an enum type_pieces or an int. */ 83 union type_stack_elt { 84 enum type_pieces piece; 85 int int_val; 86 }; 87 extern union type_stack_elt *type_stack; 88 extern int type_stack_depth, type_stack_size; 89 90 extern void write_exp_elt PARAMS ((union exp_element)); 91 92 extern void write_exp_elt_opcode PARAMS ((enum exp_opcode)); 93 94 extern void write_exp_elt_sym PARAMS ((struct symbol *)); 95 96 extern void write_exp_elt_longcst PARAMS ((LONGEST)); 97 98 extern void write_exp_elt_dblcst PARAMS ((DOUBLEST)); 99 100 extern void write_exp_elt_type PARAMS ((struct type *)); 101 102 extern void write_exp_elt_intern PARAMS ((struct internalvar *)); 103 104 extern void write_exp_string PARAMS ((struct stoken)); 105 106 extern void write_exp_bitstring PARAMS ((struct stoken)); 107 108 extern void write_exp_elt_block PARAMS ((struct block *)); 109 110 extern void write_exp_msymbol PARAMS ((struct minimal_symbol *, 111 struct type *, struct type *)); 112 113 extern void write_dollar_variable PARAMS ((struct stoken str)); 114 115 extern void 116 start_arglist PARAMS ((void)); 117 118 extern int 119 end_arglist PARAMS ((void)); 120 121 extern char * 122 copy_name PARAMS ((struct stoken)); 123 124 extern void 125 push_type PARAMS ((enum type_pieces)); 126 127 extern void 128 push_type_int PARAMS ((int)); 129 130 extern enum type_pieces 131 pop_type PARAMS ((void)); 132 133 extern int 134 pop_type_int PARAMS ((void)); 135 136 extern struct type *follow_types PARAMS ((struct type *)); 137 138 /* During parsing of a C expression, the pointer to the next character 139 is in this variable. */ 140 141 extern char *lexptr; 142 143 /* Tokens that refer to names do so with explicit pointer and length, 144 so they can share the storage that lexptr is parsing. 145 146 When it is necessary to pass a name to a function that expects 147 a null-terminated string, the substring is copied out 148 into a block of storage that namecopy points to. 149 150 namecopy is allocated once, guaranteed big enough, for each parsing. */ 151 152 extern char *namecopy; 153 154 /* Current depth in parentheses within the expression. */ 155 156 extern int paren_depth; 157 158 /* Nonzero means stop parsing on first comma (if not within parentheses). */ 159 160 extern int comma_terminates; 161 162 /* These codes indicate operator precedences for expression printing, 163 least tightly binding first. */ 164 /* Adding 1 to a precedence value is done for binary operators, 165 on the operand which is more tightly bound, so that operators 166 of equal precedence within that operand will get parentheses. */ 167 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator; 168 they are used as the "surrounding precedence" to force 169 various kinds of things to be parenthesized. */ 170 enum precedence 171 { PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR, 172 PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR, 173 PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT, 174 PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION }; 175 176 /* Table mapping opcodes into strings for printing operators 177 and precedences of the operators. */ 178 179 struct op_print 180 { 181 char *string; 182 enum exp_opcode opcode; 183 /* Precedence of operator. These values are used only by comparisons. */ 184 enum precedence precedence; 185 186 /* For a binary operator: 1 iff right associate. 187 For a unary operator: 1 iff postfix. */ 188 int right_assoc; 189 }; 190 191 #endif /* PARSER_DEFS_H */ 192