1 /* Print in infix form a struct expression.
2 Copyright (C) 1986, 1989, 1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "expression.h"
26 #include "parser-defs.h"
28 /* Prototypes for local functions */
31 print_subexp
PARAMS ((struct expression
*, int *, FILE *, enum precedence
));
34 print_simple_m2_func
PARAMS ((char *, struct expression
*, int *, FILE *));
37 print_expression (exp
, stream
)
38 struct expression
*exp
;
42 print_subexp (exp
, &pc
, stream
, PREC_NULL
);
45 /* Print the subexpression of EXP that starts in position POS, on STREAM.
46 PREC is the precedence of the surrounding operator;
47 if the precedence of the main operator of this subexpression is less,
48 parentheses are needed here. */
51 print_subexp (exp
, pos
, stream
, prec
)
52 register struct expression
*exp
;
57 register unsigned tem
;
58 register const struct op_print
*op_print_tab
;
61 register char *op_str
;
62 int assign_modify
= 0;
63 enum exp_opcode opcode
;
64 enum precedence myprec
;
65 /* Set to 1 for a right-associative operator. */
69 op_print_tab
= exp
->language_defn
->la_op_print_tab
;
71 opcode
= exp
->elts
[pc
].opcode
;
80 print_subexp (exp
, pos
, stream
,
81 (enum precedence
) ((int) myprec
+ assoc
));
82 fputs_filtered (" :: ", stream
);
83 nargs
= strlen (&exp
->elts
[pc
+ 2].string
);
84 (*pos
) += 1 + (nargs
+ sizeof (union exp_element
)) / sizeof (union exp_element
);
86 fputs_filtered (&exp
->elts
[pc
+ 2].string
, stream
);
91 value_print (value_from_longest (exp
->elts
[pc
+ 1].type
,
92 exp
->elts
[pc
+ 2].longconst
),
93 stream
, 0, Val_no_prettyprint
);
98 value_print (value_from_double (exp
->elts
[pc
+ 1].type
,
99 exp
->elts
[pc
+ 2].doubleconst
),
100 stream
, 0, Val_no_prettyprint
);
105 fputs_filtered (SYMBOL_NAME (exp
->elts
[pc
+ 1].symbol
), stream
);
110 fprintf_filtered (stream
, "$%d",
111 longest_to_int (exp
->elts
[pc
+ 1].longconst
));
116 fprintf_filtered (stream
, "$%s",
117 reg_names
[longest_to_int (exp
->elts
[pc
+ 1].longconst
));
122 fprintf_filtered (stream
, "$%s",
123 internalvar_name (exp
->elts
[pc
+ 1].internalvar
));
128 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
129 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
130 fputs_filtered (" (", stream
);
131 for (tem
= 0; tem
< nargs
; tem
++)
134 fputs_filtered (", ", stream
);
135 print_subexp (exp
, pos
, stream
, PREC_ABOVE_COMMA
);
137 fputs_filtered (")", stream
);
141 nargs
= strlen (&exp
->elts
[pc
+ 1].string
);
142 (*pos
) += 2 + (nargs
+ sizeof (union exp_element
)) / sizeof (union exp_element
);
143 fputs_filtered ("\"", stream
);
144 for (tem
= 0; tem
< nargs
; tem
++)
145 printchar ((&exp
->elts
[pc
+ 1].string
)[tem
], stream
, '"');
146 fputs_filtered ("\"", stream
);
150 if ((int) prec
> (int) PREC_COMMA
)
151 fputs_filtered ("(", stream
);
152 /* Print the subexpressions, forcing parentheses
153 around any binary operations within them.
154 This is more parentheses than are strictly necessary,
155 but it looks clearer. */
156 print_subexp (exp
, pos
, stream
, PREC_HYPER
);
157 fputs_filtered (" ? ", stream
);
158 print_subexp (exp
, pos
, stream
, PREC_HYPER
);
159 fputs_filtered (" : ", stream
);
160 print_subexp (exp
, pos
, stream
, PREC_HYPER
);
161 if ((int) prec
> (int) PREC_COMMA
)
162 fputs_filtered (")", stream
);
165 case STRUCTOP_STRUCT
:
166 tem
= strlen (&exp
->elts
[pc
+ 1].string
);
167 (*pos
) += 2 + (tem
+ sizeof (union exp_element
)) / sizeof (union exp_element
);
168 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
169 fputs_filtered (".", stream
);
170 fputs_filtered (&exp
->elts
[pc
+ 1].string
, stream
);
173 /* Will not occur for Modula-2 */
175 tem
= strlen (&exp
->elts
[pc
+ 1].string
);
176 (*pos
) += 2 + (tem
+ sizeof (union exp_element
)) / sizeof (union exp_element
);
177 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
178 fputs_filtered ("->", stream
);
179 fputs_filtered (&exp
->elts
[pc
+ 1].string
, stream
);
182 case BINOP_SUBSCRIPT
:
183 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
184 fputs_filtered ("[", stream
);
185 print_subexp (exp
, pos
, stream
, PREC_ABOVE_COMMA
);
186 fputs_filtered ("]", stream
);
189 case UNOP_POSTINCREMENT
:
190 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
191 fputs_filtered ("++", stream
);
194 case UNOP_POSTDECREMENT
:
195 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
196 fputs_filtered ("--", stream
);
201 if ((int) prec
> (int) PREC_PREFIX
)
202 fputs_filtered ("(", stream
);
203 fputs_filtered ("(", stream
);
204 type_print (exp
->elts
[pc
+ 1].type
, "", stream
, 0);
205 fputs_filtered (") ", stream
);
206 print_subexp (exp
, pos
, stream
, PREC_PREFIX
);
207 if ((int) prec
> (int) PREC_PREFIX
)
208 fputs_filtered (")", stream
);
213 if ((int) prec
> (int) PREC_PREFIX
)
214 fputs_filtered ("(", stream
);
215 if (exp
->elts
[pc
+ 1].type
->code
== TYPE_CODE_FUNC
&&
216 exp
->elts
[pc
+ 3].opcode
== OP_LONG
) {
217 /* We have a minimal symbol fn, probably. It's encoded
218 as a UNOP_MEMVAL (function-type) of an OP_LONG (int, address).
219 Swallow the OP_LONG (including both its opcodes); ignore
220 its type; print the value in the type of the MEMVAL. */
222 val
= value_at_lazy (exp
->elts
[pc
+ 1].type
,
223 (CORE_ADDR
) exp
->elts
[pc
+ 5].longconst
);
224 value_print (val
, stream
, 0, Val_no_prettyprint
);
226 fputs_filtered ("{", stream
);
227 type_print (exp
->elts
[pc
+ 1].type
, "", stream
, 0);
228 fputs_filtered ("} ", stream
);
229 print_subexp (exp
, pos
, stream
, PREC_PREFIX
);
231 if ((int) prec
> (int) PREC_PREFIX
)
232 fputs_filtered (")", stream
);
235 case BINOP_ASSIGN_MODIFY
:
236 opcode
= exp
->elts
[pc
+ 1].opcode
;
238 myprec
= PREC_ASSIGN
;
242 for (tem
= 0; op_print_tab
[tem
].opcode
!= OP_NULL
; tem
++)
243 if (op_print_tab
[tem
].opcode
== opcode
)
245 op_str
= op_print_tab
[tem
].string
;
254 fputs_filtered ("this", stream
);
259 case BINOP_MULTI_SUBSCRIPT
:
261 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
262 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
263 fprintf (stream
, " [");
264 for (tem
= 0; tem
< nargs
; tem
++)
267 fprintf (stream
, ", ");
268 print_subexp (exp
, pos
, stream
, PREC_ABOVE_COMMA
);
270 fprintf (stream
, "]");
275 fprintf(stream
,"VAL(");
276 type_print(exp
->elts
[pc
+1].type
,"",stream
,0);
278 print_subexp(exp
,pos
,stream
,PREC_PREFIX
);
283 print_simple_m2_func("CAP",exp
,pos
,stream
);
287 print_simple_m2_func("CHR",exp
,pos
,stream
);
291 print_simple_m2_func("ORD",exp
,pos
,stream
);
295 print_simple_m2_func("ABS",exp
,pos
,stream
);
299 print_simple_m2_func("FLOAT",exp
,pos
,stream
);
303 print_simple_m2_func("HIGH",exp
,pos
,stream
);
307 print_simple_m2_func("MAX",exp
,pos
,stream
);
311 print_simple_m2_func("MIN",exp
,pos
,stream
);
315 print_simple_m2_func("ODD",exp
,pos
,stream
);
319 print_simple_m2_func("TRUNC",exp
,pos
,stream
);
324 error("print_subexp: Not implemented.");
330 for (tem
= 0; op_print_tab
[tem
].opcode
!= OP_NULL
; tem
++)
331 if (op_print_tab
[tem
].opcode
== opcode
)
333 op_str
= op_print_tab
[tem
].string
;
334 myprec
= op_print_tab
[tem
].precedence
;
335 assoc
= op_print_tab
[tem
].right_assoc
;
340 if ((int) myprec
< (int) prec
)
341 fputs_filtered ("(", stream
);
342 if ((int) opcode
> (int) BINOP_END
)
344 /* Unary prefix operator. */
345 fputs_filtered (op_str
, stream
);
346 print_subexp (exp
, pos
, stream
, PREC_PREFIX
);
350 /* Binary operator. */
351 /* Print left operand.
352 If operator is right-associative,
353 increment precedence for this operand. */
354 print_subexp (exp
, pos
, stream
,
355 (enum precedence
) ((int) myprec
+ assoc
));
356 /* Print the operator itself. */
358 fprintf_filtered (stream
, " %s= ", op_str
);
359 else if (op_str
[0] == ',')
360 fprintf_filtered (stream
, "%s ", op_str
);
362 fprintf_filtered (stream
, " %s ", op_str
);
363 /* Print right operand.
364 If operator is left-associative,
365 increment precedence for this operand. */
366 print_subexp (exp
, pos
, stream
,
367 (enum precedence
) ((int) myprec
+ !assoc
));
370 if ((int) myprec
< (int) prec
)
371 fputs_filtered (")", stream
);
374 /* Print out something of the form <s>(<arg>).
375 This is used to print out some builtin Modula-2
377 FIXME: There is probably some way to get the precedence
378 rules to do this (print a unary operand with parens around it). */
380 print_simple_m2_func(s
,exp
,pos
,stream
)
382 register struct expression
*exp
;
386 fprintf(stream
,"%s(",s
);
387 print_subexp(exp
,pos
,stream
,PREC_PREFIX
);
391 /* Return the operator corresponding to opcode OP as
392 a string. NULL indicates that the opcode was not found in the
393 current language table. */
399 register const struct op_print
*op_print_tab
;
401 op_print_tab
= current_language
->la_op_print_tab
;
402 for (tem
= 0; op_print_tab
[tem
].opcode
!= OP_NULL
; tem
++)
403 if (op_print_tab
[tem
].opcode
== op
)
404 return op_print_tab
[tem
].string
;
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