-void
-print_expression (struct expression *exp, struct ui_file *stream)
-{
- int pc = 0;
-
- print_subexp (exp, &pc, stream, PREC_NULL);
-}
-
-/* Print the subexpression of EXP that starts in position POS, on STREAM.
- PREC is the precedence of the surrounding operator;
- if the precedence of the main operator of this subexpression is less,
- parentheses are needed here. */
-
-void
-print_subexp (struct expression *exp, int *pos,
- struct ui_file *stream, enum precedence prec)
-{
- exp->language_defn->la_exp_desc->print_subexp (exp, pos, stream, prec);
-}
-
-/* Standard implementation of print_subexp for use in language_defn
- vectors. */
-void
-print_subexp_standard (struct expression *exp, int *pos,
- struct ui_file *stream, enum precedence prec)
-{
- unsigned tem;
- const struct op_print *op_print_tab;
- int pc;
- unsigned nargs;
- char *op_str;
- int assign_modify = 0;
- enum exp_opcode opcode;
- enum precedence myprec = PREC_NULL;
- /* Set to 1 for a right-associative operator. */
- int assoc = 0;
- struct value *val;
- char *tempstr = NULL;
-
- op_print_tab = exp->language_defn->la_op_print_tab;
- pc = (*pos)++;
- opcode = exp->elts[pc].opcode;
- switch (opcode)
- {
- /* Common ops */
-
- case OP_TYPE:
- (*pos) += 2;
- type_print (exp->elts[pc + 1].type, "", stream, 0);
- return;
-
- case OP_SCOPE:
- myprec = PREC_PREFIX;
- assoc = 0;
- fputs_filtered (type_name_no_tag (exp->elts[pc + 1].type), stream);
- fputs_filtered ("::", stream);
- nargs = longest_to_int (exp->elts[pc + 2].longconst);
- (*pos) += 4 + BYTES_TO_EXP_ELEM (nargs + 1);
- fputs_filtered (&exp->elts[pc + 3].string, stream);
- return;
-
- case OP_LONG:
- {
- struct value_print_options opts;
-
- get_no_prettyformat_print_options (&opts);
- (*pos) += 3;
- value_print (value_from_longest (exp->elts[pc + 1].type,
- exp->elts[pc + 2].longconst),
- stream, &opts);
- }
- return;
-
- case OP_DOUBLE:
- {
- struct value_print_options opts;
-
- get_no_prettyformat_print_options (&opts);
- (*pos) += 3;
- value_print (value_from_double (exp->elts[pc + 1].type,
- exp->elts[pc + 2].doubleconst),
- stream, &opts);
- }
- return;
-
- case OP_VAR_VALUE:
- {
- const struct block *b;
-
- (*pos) += 3;
- b = exp->elts[pc + 1].block;
- if (b != NULL
- && BLOCK_FUNCTION (b) != NULL
- && SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b)) != NULL)
- {
- fputs_filtered (SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b)), stream);
- fputs_filtered ("::", stream);
- }
- fputs_filtered (SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol), stream);
- }
- return;
-
- case OP_VAR_ENTRY_VALUE:
- {
- (*pos) += 2;
- fprintf_filtered (stream, "%s@entry",
- SYMBOL_PRINT_NAME (exp->elts[pc + 1].symbol));
- }
- return;
-
- case OP_LAST:
- (*pos) += 2;
- fprintf_filtered (stream, "$%d",
- longest_to_int (exp->elts[pc + 1].longconst));
- return;
-
- case OP_REGISTER:
- {
- const char *name = &exp->elts[pc + 2].string;
-
- (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
- fprintf_filtered (stream, "$%s", name);
- return;
- }
-
- case OP_BOOL:
- (*pos) += 2;
- fprintf_filtered (stream, "%s",
- longest_to_int (exp->elts[pc + 1].longconst)
- ? "TRUE" : "FALSE");
- return;
-
- case OP_INTERNALVAR:
- (*pos) += 2;
- fprintf_filtered (stream, "$%s",
- internalvar_name (exp->elts[pc + 1].internalvar));
- return;
-
- case OP_FUNCALL:
- (*pos) += 2;
- nargs = longest_to_int (exp->elts[pc + 1].longconst);
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered (" (", stream);
- for (tem = 0; tem < nargs; tem++)
- {
- if (tem != 0)
- fputs_filtered (", ", stream);
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- }
- fputs_filtered (")", stream);
- return;
-
- case OP_NAME:
- nargs = longest_to_int (exp->elts[pc + 1].longconst);
- (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
- fputs_filtered (&exp->elts[pc + 2].string, stream);
- return;
-
- case OP_STRING:
- {
- struct value_print_options opts;
-
- nargs = longest_to_int (exp->elts[pc + 1].longconst);
- (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
- /* LA_PRINT_STRING will print using the current repeat count threshold.
- If necessary, we can temporarily set it to zero, or pass it as an
- additional parameter to LA_PRINT_STRING. -fnf */
- get_user_print_options (&opts);
- LA_PRINT_STRING (stream, builtin_type (exp->gdbarch)->builtin_char,
- (gdb_byte *) &exp->elts[pc + 2].string, nargs,
- NULL, 0, &opts);
- }
- return;
-
- case OP_OBJC_NSSTRING: /* Objective-C Foundation Class
- NSString constant. */
- {
- struct value_print_options opts;
-
- nargs = longest_to_int (exp->elts[pc + 1].longconst);
- (*pos) += 3 + BYTES_TO_EXP_ELEM (nargs + 1);
- fputs_filtered ("@\"", stream);
- get_user_print_options (&opts);
- LA_PRINT_STRING (stream, builtin_type (exp->gdbarch)->builtin_char,
- (gdb_byte *) &exp->elts[pc + 2].string, nargs,
- NULL, 0, &opts);
- fputs_filtered ("\"", stream);
- }
- return;
-
- case OP_OBJC_MSGCALL:
- { /* Objective C message (method) call. */
- char *selector;
-
- (*pos) += 3;
- nargs = longest_to_int (exp->elts[pc + 2].longconst);
- fprintf_unfiltered (stream, "[");
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- if (0 == target_read_string (exp->elts[pc + 1].longconst,
- &selector, 1024, NULL))
- {
- error (_("bad selector"));
- return;
- }
- if (nargs)
- {
- char *s, *nextS;
-
- s = (char *) alloca (strlen (selector) + 1);
- strcpy (s, selector);
- for (tem = 0; tem < nargs; tem++)
- {
- nextS = strchr (s, ':');
- gdb_assert (nextS); /* Make sure we found ':'. */
- *nextS = '\0';
- fprintf_unfiltered (stream, " %s: ", s);
- s = nextS + 1;
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- }
- }
- else
- {
- fprintf_unfiltered (stream, " %s", selector);
- }
- fprintf_unfiltered (stream, "]");
- /* "selector" was malloc'd by target_read_string. Free it. */
- xfree (selector);
- return;
- }
-
- case OP_ARRAY:
- (*pos) += 3;
- nargs = longest_to_int (exp->elts[pc + 2].longconst);
- nargs -= longest_to_int (exp->elts[pc + 1].longconst);
- nargs++;
- tem = 0;
- if (exp->elts[pc + 4].opcode == OP_LONG
- && exp->elts[pc + 5].type
- == builtin_type (exp->gdbarch)->builtin_char
- && exp->language_defn->la_language == language_c)
- {
- /* Attempt to print C character arrays using string syntax.
- Walk through the args, picking up one character from each
- of the OP_LONG expression elements. If any array element
- does not match our expection of what we should find for
- a simple string, revert back to array printing. Note that
- the last expression element is an explicit null terminator
- byte, which doesn't get printed. */
- tempstr = (char *) alloca (nargs);
- pc += 4;
- while (tem < nargs)
- {
- if (exp->elts[pc].opcode != OP_LONG
- || exp->elts[pc + 1].type
- != builtin_type (exp->gdbarch)->builtin_char)
- {
- /* Not a simple array of char, use regular array
- printing. */
- tem = 0;
- break;
- }
- else
- {
- tempstr[tem++] =
- longest_to_int (exp->elts[pc + 2].longconst);
- pc += 4;
- }
- }
- }
- if (tem > 0)
- {
- struct value_print_options opts;
-
- get_user_print_options (&opts);
- LA_PRINT_STRING (stream, builtin_type (exp->gdbarch)->builtin_char,
- (gdb_byte *) tempstr, nargs - 1, NULL, 0, &opts);
- (*pos) = pc;
- }
- else
- {
- fputs_filtered (" {", stream);
- for (tem = 0; tem < nargs; tem++)
- {
- if (tem != 0)
- {
- fputs_filtered (", ", stream);
- }
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- }
- fputs_filtered ("}", stream);
- }
- return;
-
- case TERNOP_COND:
- if ((int) prec > (int) PREC_COMMA)
- fputs_filtered ("(", stream);
- /* Print the subexpressions, forcing parentheses
- around any binary operations within them.
- This is more parentheses than are strictly necessary,
- but it looks clearer. */
- print_subexp (exp, pos, stream, PREC_HYPER);
- fputs_filtered (" ? ", stream);
- print_subexp (exp, pos, stream, PREC_HYPER);
- fputs_filtered (" : ", stream);
- print_subexp (exp, pos, stream, PREC_HYPER);
- if ((int) prec > (int) PREC_COMMA)
- fputs_filtered (")", stream);
- return;
-
- case TERNOP_SLICE:
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered ("(", stream);
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- fputs_filtered (opcode == TERNOP_SLICE ? " : " : " UP ", stream);
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- fputs_filtered (")", stream);
- return;
-
- case STRUCTOP_STRUCT:
- tem = longest_to_int (exp->elts[pc + 1].longconst);
- (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered (".", stream);
- fputs_filtered (&exp->elts[pc + 2].string, stream);
- return;
-
- /* Will not occur for Modula-2. */
- case STRUCTOP_PTR:
- tem = longest_to_int (exp->elts[pc + 1].longconst);
- (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered ("->", stream);
- fputs_filtered (&exp->elts[pc + 2].string, stream);
- return;
-
- case STRUCTOP_MEMBER:
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered (".*", stream);
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- return;
-
- case STRUCTOP_MPTR:
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered ("->*", stream);
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- return;
-
- case BINOP_SUBSCRIPT:
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered ("[", stream);
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- fputs_filtered ("]", stream);
- return;
-
- case UNOP_POSTINCREMENT:
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered ("++", stream);
- return;
-
- case UNOP_POSTDECREMENT:
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered ("--", stream);
- return;
-
- case UNOP_CAST:
- (*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 ((int) prec > (int) PREC_PREFIX)
- fputs_filtered (")", stream);
- return;
-
- case UNOP_CAST_TYPE:
- if ((int) prec > (int) PREC_PREFIX)
- fputs_filtered ("(", stream);
- fputs_filtered ("(", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- fputs_filtered (") ", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- if ((int) prec > (int) PREC_PREFIX)
- fputs_filtered (")", stream);
- return;
-
- case UNOP_DYNAMIC_CAST:
- case UNOP_REINTERPRET_CAST:
- fputs_filtered (opcode == UNOP_DYNAMIC_CAST ? "dynamic_cast"
- : "reinterpret_cast", stream);
- fputs_filtered ("<", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- fputs_filtered ("> (", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- fputs_filtered (")", stream);
- return;
-
- case UNOP_MEMVAL:
- (*pos) += 2;
- if ((int) prec > (int) PREC_PREFIX)
- fputs_filtered ("(", stream);
- if (TYPE_CODE (exp->elts[pc + 1].type) == TYPE_CODE_FUNC
- && exp->elts[pc + 3].opcode == OP_LONG)
- {
- struct value_print_options opts;
-
- /* 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);
- get_no_prettyformat_print_options (&opts);
- value_print (val, stream, &opts);
- }
- 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;
-
- case UNOP_MEMVAL_TYPE:
- if ((int) prec > (int) PREC_PREFIX)
- fputs_filtered ("(", stream);
- fputs_filtered ("{", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- fputs_filtered ("} ", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- if ((int) prec > (int) PREC_PREFIX)
- fputs_filtered (")", stream);
- return;
-
- case UNOP_MEMVAL_TLS:
- (*pos) += 3;
- if ((int) prec > (int) PREC_PREFIX)
- fputs_filtered ("(", stream);
- fputs_filtered ("{", stream);
- type_print (exp->elts[pc + 2].type, "", stream, 0);
- fputs_filtered ("} ", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- if ((int) prec > (int) PREC_PREFIX)
- fputs_filtered (")", stream);
- return;
-
- case BINOP_ASSIGN_MODIFY:
- opcode = exp->elts[pc + 1].opcode;
- (*pos) += 2;
- myprec = PREC_ASSIGN;
- assoc = 1;
- assign_modify = 1;
- 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;
- }
- if (op_print_tab[tem].opcode != opcode)
- /* Not found; don't try to keep going because we don't know how
- to interpret further elements. */
- error (_("Invalid expression"));
- break;
-
- /* C++ ops */
-
- case OP_THIS:
- ++(*pos);
- if (exp->language_defn->la_name_of_this)
- fputs_filtered (exp->language_defn->la_name_of_this, stream);
- else
- fprintf_filtered (stream, _("<language %s has no 'this'>"),
- exp->language_defn->la_name);
- return;
-
- /* Modula-2 ops */
-
- case MULTI_SUBSCRIPT:
- (*pos) += 2;
- nargs = longest_to_int (exp->elts[pc + 1].longconst);
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fprintf_unfiltered (stream, " [");
- for (tem = 0; tem < nargs; tem++)
- {
- if (tem != 0)
- fprintf_unfiltered (stream, ", ");
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- }
- fprintf_unfiltered (stream, "]");
- return;
-
- case BINOP_VAL:
- (*pos) += 2;
- fprintf_unfiltered (stream, "VAL(");
- type_print (exp->elts[pc + 1].type, "", stream, 0);
- fprintf_unfiltered (stream, ",");
- print_subexp (exp, pos, stream, PREC_PREFIX);
- fprintf_unfiltered (stream, ")");
- return;
-
- case TYPE_INSTANCE:
- {
- LONGEST count = exp->elts[pc + 1].longconst;
-
- /* The COUNT. */
- (*pos)++;
- fputs_unfiltered ("TypesInstance(", stream);
- while (count-- > 0)
- {
- type_print (exp->elts[(*pos)++].type, "", stream, 0);
- if (count > 0)
- fputs_unfiltered (",", stream);
- }
- fputs_unfiltered (",", stream);
- /* Ending COUNT and ending TYPE_INSTANCE. */
- (*pos) += 2;
- print_subexp (exp, pos, stream, PREC_PREFIX);
- fputs_unfiltered (")", stream);
- return;
- }
-
- case OP_RANGE:
- {
- enum range_type range_type;
-
- range_type = (enum range_type)
- longest_to_int (exp->elts[pc + 1].longconst);
- *pos += 2;
-
- fputs_filtered ("RANGE(", stream);
- if (range_type == HIGH_BOUND_DEFAULT
- || range_type == NONE_BOUND_DEFAULT)
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- fputs_filtered ("..", stream);
- if (range_type == LOW_BOUND_DEFAULT
- || range_type == NONE_BOUND_DEFAULT)
- print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
- fputs_filtered (")", stream);
- return;
- }
-
- /* Default ops */
-
- default:
- 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;
- myprec = op_print_tab[tem].precedence;
- assoc = op_print_tab[tem].right_assoc;
- break;
- }
- if (op_print_tab[tem].opcode != opcode)
- /* Not found; don't try to keep going because we don't know how
- to interpret further elements. For example, this happens
- if opcode is OP_TYPE. */
- error (_("Invalid expression"));
- }
-
- /* Note that PREC_BUILTIN will always emit parentheses. */
- if ((int) myprec < (int) prec)
- fputs_filtered ("(", stream);
- if ((int) opcode > (int) BINOP_END)
- {
- if (assoc)
- {
- /* Unary postfix operator. */
- print_subexp (exp, pos, stream, PREC_SUFFIX);
- fputs_filtered (op_str, stream);
- }
- else
- {
- /* Unary prefix operator. */
- fputs_filtered (op_str, stream);
- if (myprec == PREC_BUILTIN_FUNCTION)
- fputs_filtered ("(", stream);
- print_subexp (exp, pos, stream, PREC_PREFIX);
- if (myprec == PREC_BUILTIN_FUNCTION)
- fputs_filtered (")", stream);
- }
- }
- else
- {
- /* Binary operator. */
- /* Print left operand.
- If operator is right-associative,
- increment precedence for this operand. */
- print_subexp (exp, pos, stream,
- (enum precedence) ((int) myprec + assoc));
- /* Print the operator itself. */
- if (assign_modify)
- fprintf_filtered (stream, " %s= ", op_str);
- else if (op_str[0] == ',')
- fprintf_filtered (stream, "%s ", op_str);
- else
- fprintf_filtered (stream, " %s ", op_str);
- /* Print right operand.
- If operator is left-associative,
- increment precedence for this operand. */
- print_subexp (exp, pos, stream,
- (enum precedence) ((int) myprec + !assoc));
- }
-
- if ((int) myprec < (int) prec)
- fputs_filtered (")", 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 (enum exp_opcode op)
-{
- int tem;
- 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;
-}
-
-/* Support for dumping the raw data from expressions in a human readable
- form. */
-
-static int dump_subexp_body (struct expression *exp, struct ui_file *, int);
-
-/* Name for OPCODE, when it appears in expression EXP. */
-
-char *
-op_name (struct expression *exp, enum exp_opcode opcode)
-{
- return exp->language_defn->la_exp_desc->op_name (opcode);
-}
-