/* Print in infix form a struct expression.
- Copyright (C) 1986, 1989 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1989, 1991 Free Software Foundation, Inc.
This file is part of GDB.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
#include "defs.h"
#include "symtab.h"
-#include "param.h"
+#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
+#include "language.h"
+#include "parser-defs.h"
-\f
-/* These codes indicate operator precedences, 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_OR, PREC_AND,
- PREC_LOGIOR, PREC_LOGAND, PREC_LOGXOR, PREC_EQUAL, PREC_ORDER,
- PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
- PREC_HYPER, PREC_PREFIX, PREC_SUFFIX };
-
-/* 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;
- int right_assoc;
-};
-
-const static struct op_print op_print_tab[] =
- {
- {",", BINOP_COMMA, PREC_COMMA, 0},
- {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
- {"||", BINOP_OR, PREC_OR, 0},
- {"&&", BINOP_AND, PREC_AND, 0},
- {"|", BINOP_LOGIOR, PREC_LOGIOR, 0},
- {"&", BINOP_LOGAND, PREC_LOGAND, 0},
- {"^", BINOP_LOGXOR, PREC_LOGXOR, 0},
- {"==", BINOP_EQUAL, PREC_EQUAL, 0},
- {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
- {"<=", BINOP_LEQ, PREC_ORDER, 0},
- {">=", BINOP_GEQ, PREC_ORDER, 0},
- {">", BINOP_GTR, PREC_ORDER, 0},
- {"<", BINOP_LESS, PREC_ORDER, 0},
- {">>", BINOP_RSH, PREC_SHIFT, 0},
- {"<<", BINOP_LSH, PREC_SHIFT, 0},
- {"+", BINOP_ADD, PREC_ADD, 0},
- {"-", BINOP_SUB, PREC_ADD, 0},
- {"*", BINOP_MUL, PREC_MUL, 0},
- {"/", BINOP_DIV, PREC_MUL, 0},
- {"%", BINOP_REM, PREC_MUL, 0},
- {"@", BINOP_REPEAT, PREC_REPEAT, 0},
- {"-", UNOP_NEG, PREC_PREFIX, 0},
- {"!", UNOP_ZEROP, PREC_PREFIX, 0},
- {"~", UNOP_LOGNOT, PREC_PREFIX, 0},
- {"*", UNOP_IND, PREC_PREFIX, 0},
- {"&", UNOP_ADDR, PREC_PREFIX, 0},
- {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
- {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
- {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
- /* C++ */
- {"::", BINOP_SCOPE, PREC_PREFIX, 0},
- };
-\f
-static void print_subexp ();
+/* Prototypes for local functions */
+
+static void
+print_subexp PARAMS ((struct expression *, int *, FILE *, enum precedence));
+
+static void
+print_simple_m2_func PARAMS ((char *, struct expression *, int *, FILE *));
void
print_expression (exp, stream)
enum precedence prec;
{
register unsigned tem;
+ register const struct op_print *op_print_tab;
register int pc;
unsigned nargs;
register char *op_str;
enum precedence myprec;
/* Set to 1 for a right-associative operator. */
int assoc;
+ value val;
+ op_print_tab = exp->language_defn->la_op_print_tab;
pc = (*pos)++;
opcode = exp->elts[pc].opcode;
switch (opcode)
{
+ /* Common ops */
+
case OP_SCOPE:
myprec = PREC_PREFIX;
assoc = 0;
case OP_LONG:
(*pos) += 3;
- value_print (value_from_long (exp->elts[pc + 1].type,
+ value_print (value_from_longest (exp->elts[pc + 1].type,
exp->elts[pc + 2].longconst),
stream, 0, Val_no_prettyprint);
return;
case OP_REGISTER:
(*pos) += 2;
fprintf_filtered (stream, "$%s",
- longest_to_int (reg_names[exp->elts[pc + 1].longconst]));
+ reg_names[longest_to_int (exp->elts[pc + 1].longconst));
return;
case OP_INTERNALVAR:
fputs_filtered (&exp->elts[pc + 1].string, stream);
return;
+ /* Will not occur for Modula-2 */
case STRUCTOP_PTR:
tem = strlen (&exp->elts[pc + 1].string);
(*pos) += 2 + (tem + sizeof (union exp_element)) / sizeof (union exp_element);
(*pos) += 2;
if ((int) prec > (int) PREC_PREFIX)
fputs_filtered ("(", stream);
- fputs_filtered ("{", stream);
- type_print (exp->elts[pc + 1].type, "", stream, 0);
- fputs_filtered ("} ", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
+ if (exp->elts[pc + 1].type->code == TYPE_CODE_FUNC &&
+ exp->elts[pc + 3].opcode == OP_LONG) {
+ /* We have a minimal symbol fn, probably. It's encoded
+ as a UNOP_MEMVAL (function-type) of an OP_LONG (int, address).
+ Swallow the OP_LONG (including both its opcodes); ignore
+ its type; print the value in the type of the MEMVAL. */
+ (*pos) += 4;
+ val = value_at_lazy (exp->elts[pc + 1].type,
+ (CORE_ADDR) exp->elts[pc + 5].longconst);
+ value_print (val, stream, 0, Val_no_prettyprint);
+ } else {
+ fputs_filtered ("{", stream);
+ type_print (exp->elts[pc + 1].type, "", stream, 0);
+ fputs_filtered ("} ", stream);
+ print_subexp (exp, pos, stream, PREC_PREFIX);
+ }
if ((int) prec > (int) PREC_PREFIX)
fputs_filtered (")", stream);
return;
myprec = PREC_ASSIGN;
assoc = 1;
assign_modify = 1;
- for (tem = 0; tem < sizeof op_print_tab / sizeof op_print_tab[0]; tem++)
+ op_str = "???";
+ for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
if (op_print_tab[tem].opcode == opcode)
{
op_str = op_print_tab[tem].string;
}
break;
+ /* C++ ops */
+
case OP_THIS:
++(*pos);
fputs_filtered ("this", stream);
return;
+ /* Modula-2 ops */
+
+ case BINOP_MULTI_SUBSCRIPT:
+ (*pos) += 2;
+ nargs = longest_to_int (exp->elts[pc + 1].longconst);
+ print_subexp (exp, pos, stream, PREC_SUFFIX);
+ fprintf (stream, " [");
+ for (tem = 0; tem < nargs; tem++)
+ {
+ if (tem != 0)
+ fprintf (stream, ", ");
+ print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
+ }
+ fprintf (stream, "]");
+ return;
+
+ case BINOP_VAL:
+ (*pos)+=2;
+ fprintf(stream,"VAL(");
+ type_print(exp->elts[pc+1].type,"",stream,0);
+ fprintf(stream,",");
+ print_subexp(exp,pos,stream,PREC_PREFIX);
+ fprintf(stream,")");
+ return;
+
+ case UNOP_CAP:
+ print_simple_m2_func("CAP",exp,pos,stream);
+ return;
+
+ case UNOP_CHR:
+ print_simple_m2_func("CHR",exp,pos,stream);
+ return;
+
+ case UNOP_ORD:
+ print_simple_m2_func("ORD",exp,pos,stream);
+ return;
+
+ case UNOP_ABS:
+ print_simple_m2_func("ABS",exp,pos,stream);
+ return;
+
+ case UNOP_FLOAT:
+ print_simple_m2_func("FLOAT",exp,pos,stream);
+ return;
+
+ case UNOP_HIGH:
+ print_simple_m2_func("HIGH",exp,pos,stream);
+ return;
+
+ case UNOP_MAX:
+ print_simple_m2_func("MAX",exp,pos,stream);
+ return;
+
+ case UNOP_MIN:
+ print_simple_m2_func("MIN",exp,pos,stream);
+ return;
+
+ case UNOP_ODD:
+ print_simple_m2_func("ODD",exp,pos,stream);
+ return;
+
+ case UNOP_TRUNC:
+ print_simple_m2_func("TRUNC",exp,pos,stream);
+ return;
+
+ case BINOP_INCL:
+ case BINOP_EXCL:
+ error("print_subexp: Not implemented.");
+
+ /* Default ops */
+
default:
- for (tem = 0; tem < sizeof op_print_tab / sizeof op_print_tab[0]; tem++)
+ op_str = "???";
+ for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
if (op_print_tab[tem].opcode == opcode)
{
op_str = op_print_tab[tem].string;
assoc = op_print_tab[tem].right_assoc;
break;
}
- }
+ }
if ((int) myprec < (int) prec)
fputs_filtered ("(", stream);
print_subexp (exp, pos, stream,
(enum precedence) ((int) myprec + !assoc));
}
+
if ((int) myprec < (int) prec)
fputs_filtered (")", stream);
}
+
+/* Print out something of the form <s>(<arg>).
+ This is used to print out some builtin Modula-2
+ functions.
+ FIXME: There is probably some way to get the precedence
+ rules to do this (print a unary operand with parens around it). */
+static void
+print_simple_m2_func(s,exp,pos,stream)
+ char *s;
+ register struct expression *exp;
+ register int *pos;
+ FILE *stream;
+{
+ fprintf(stream,"%s(",s);
+ print_subexp(exp,pos,stream,PREC_PREFIX);
+ fprintf(stream,")");
+}
+
+/* Return the operator corresponding to opcode OP as
+ a string. NULL indicates that the opcode was not found in the
+ current language table. */
+char *
+op_string(op)
+ enum exp_opcode op;
+{
+ int tem;
+ register const struct op_print *op_print_tab;
+
+ op_print_tab = current_language->la_op_print_tab;
+ for (tem = 0; op_print_tab[tem].opcode != OP_NULL; tem++)
+ if (op_print_tab[tem].opcode == op)
+ return op_print_tab[tem].string;
+ return NULL;
+}
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