1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* Parser definitions for GDB.
Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
Modified from expread.y by the Department of Computer Science at the
State University of New York at Buffalo.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#if !defined (PARSER_DEFS_H)
#define PARSER_DEFS_H 1
struct std_regs {
char *name;
int regnum;
};
extern struct std_regs std_regs[];
extern unsigned num_std_regs;
extern struct expression *expout;
extern int expout_size;
extern int expout_ptr;
/* If this is nonzero, this block is used as the lexical context
for symbol names. */
extern struct block *expression_context_block;
/* The innermost context required by the stack and register variables
we've encountered so far. */
extern struct block *innermost_block;
/* The block in which the most recently discovered symbol was found.
FIXME: Should be declared along with lookup_symbol in symtab.h; is not
related specifically to parsing. */
extern struct block *block_found;
/* Number of arguments seen so far in innermost function call. */
extern int arglist_len;
/* A string token, either a char-string or bit-string. Char-strings are
used, for example, for the names of symbols. */
struct stoken
{
/* Pointer to first byte of char-string or first bit of bit-string */
char *ptr;
/* Length of string in bytes for char-string or bits for bit-string */
int length;
};
struct ttype
{
struct stoken stoken;
struct type *type;
};
struct symtoken
{
struct stoken stoken;
struct symbol *sym;
int is_a_field_of_this;
};
/* For parsing of complicated types.
An array should be preceded in the list by the size of the array. */
enum type_pieces
{tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function};
/* The stack can contain either an enum type_pieces or an int. */
union type_stack_elt {
enum type_pieces piece;
int int_val;
};
extern union type_stack_elt *type_stack;
extern int type_stack_depth, type_stack_size;
extern void write_exp_elt PARAMS ((union exp_element));
extern void write_exp_elt_opcode PARAMS ((enum exp_opcode));
extern void write_exp_elt_sym PARAMS ((struct symbol *));
extern void write_exp_elt_longcst PARAMS ((LONGEST));
extern void write_exp_elt_dblcst PARAMS ((DOUBLEST));
extern void write_exp_elt_type PARAMS ((struct type *));
extern void write_exp_elt_intern PARAMS ((struct internalvar *));
extern void write_exp_string PARAMS ((struct stoken));
extern void write_exp_bitstring PARAMS ((struct stoken));
extern void write_exp_elt_block PARAMS ((struct block *));
extern void write_exp_msymbol PARAMS ((struct minimal_symbol *,
struct type *, struct type *));
extern void write_dollar_variable PARAMS ((struct stoken str));
extern void
start_arglist PARAMS ((void));
extern int
end_arglist PARAMS ((void));
extern char *
copy_name PARAMS ((struct stoken));
extern void
push_type PARAMS ((enum type_pieces));
extern void
push_type_int PARAMS ((int));
extern enum type_pieces
pop_type PARAMS ((void));
extern int
pop_type_int PARAMS ((void));
extern int
length_of_subexp PARAMS ((struct expression *, int));
extern struct type *follow_types PARAMS ((struct type *));
/* During parsing of a C expression, the pointer to the next character
is in this variable. */
extern char *lexptr;
/* Tokens that refer to names do so with explicit pointer and length,
so they can share the storage that lexptr is parsing.
When it is necessary to pass a name to a function that expects
a null-terminated string, the substring is copied out
into a block of storage that namecopy points to.
namecopy is allocated once, guaranteed big enough, for each parsing. */
extern char *namecopy;
/* Current depth in parentheses within the expression. */
extern int paren_depth;
/* Nonzero means stop parsing on first comma (if not within parentheses). */
extern int comma_terminates;
/* These codes indicate operator precedences for expression printing,
least tightly binding first. */
/* Adding 1 to a precedence value is done for binary operators,
on the operand which is more tightly bound, so that operators
of equal precedence within that operand will get parentheses. */
/* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
they are used as the "surrounding precedence" to force
various kinds of things to be parenthesized. */
enum precedence
{ PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION };
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
struct op_print
{
char *string;
enum exp_opcode opcode;
/* Precedence of operator. These values are used only by comparisons. */
enum precedence precedence;
/* For a binary operator: 1 iff right associate.
For a unary operator: 1 iff postfix. */
int right_assoc;
};
#endif /* PARSER_DEFS_H */
|
