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6cb06a8cda
Now that filtered and unfiltered output can be treated identically, we can unify the printf family of functions. This is done under the name "gdb_printf". Most of this patch was written by script.
317 lines
7.7 KiB
C
317 lines
7.7 KiB
C
/* Modula 2 language support routines for GDB, the GNU debugger.
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Copyright (C) 1992-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "varobj.h"
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#include "m2-lang.h"
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#include "c-lang.h"
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#include "valprint.h"
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#include "gdbarch.h"
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#include "m2-exp.h"
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/* A helper function for UNOP_HIGH. */
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struct value *
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eval_op_m2_high (struct type *expect_type, struct expression *exp,
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enum noside noside,
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struct value *arg1)
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{
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if (noside == EVAL_AVOID_SIDE_EFFECTS)
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return arg1;
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else
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{
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arg1 = coerce_ref (arg1);
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struct type *type = check_typedef (value_type (arg1));
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if (m2_is_unbounded_array (type))
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{
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struct value *temp = arg1;
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type = type->field (1).type ();
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/* i18n: Do not translate the "_m2_high" part! */
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arg1 = value_struct_elt (&temp, {}, "_m2_high", NULL,
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_("unbounded structure "
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"missing _m2_high field"));
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if (value_type (arg1) != type)
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arg1 = value_cast (type, arg1);
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}
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}
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return arg1;
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}
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/* A helper function for BINOP_SUBSCRIPT. */
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struct value *
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eval_op_m2_subscript (struct type *expect_type, struct expression *exp,
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enum noside noside,
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struct value *arg1, struct value *arg2)
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{
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/* If the user attempts to subscript something that is not an
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array or pointer type (like a plain int variable for example),
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then report this as an error. */
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arg1 = coerce_ref (arg1);
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struct type *type = check_typedef (value_type (arg1));
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if (m2_is_unbounded_array (type))
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{
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struct value *temp = arg1;
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type = type->field (0).type ();
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if (type == NULL || (type->code () != TYPE_CODE_PTR))
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error (_("internal error: unbounded "
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"array structure is unknown"));
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/* i18n: Do not translate the "_m2_contents" part! */
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arg1 = value_struct_elt (&temp, {}, "_m2_contents", NULL,
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_("unbounded structure "
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"missing _m2_contents field"));
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if (value_type (arg1) != type)
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arg1 = value_cast (type, arg1);
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check_typedef (value_type (arg1));
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return value_ind (value_ptradd (arg1, value_as_long (arg2)));
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}
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else
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if (type->code () != TYPE_CODE_ARRAY)
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{
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if (type->name ())
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error (_("cannot subscript something of type `%s'"),
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type->name ());
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else
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error (_("cannot subscript requested type"));
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}
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if (noside == EVAL_AVOID_SIDE_EFFECTS)
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return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
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else
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return value_subscript (arg1, value_as_long (arg2));
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}
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/* Single instance of the M2 language. */
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static m2_language m2_language_defn;
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/* See language.h. */
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void
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m2_language::language_arch_info (struct gdbarch *gdbarch,
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struct language_arch_info *lai) const
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{
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const struct builtin_m2_type *builtin = builtin_m2_type (gdbarch);
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/* Helper function to allow shorter lines below. */
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auto add = [&] (struct type * t)
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{
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lai->add_primitive_type (t);
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};
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add (builtin->builtin_char);
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add (builtin->builtin_int);
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add (builtin->builtin_card);
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add (builtin->builtin_real);
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add (builtin->builtin_bool);
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lai->set_string_char_type (builtin->builtin_char);
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lai->set_bool_type (builtin->builtin_bool, "BOOLEAN");
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}
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/* See languge.h. */
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void
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m2_language::printchar (int c, struct type *type,
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struct ui_file *stream) const
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{
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gdb_puts ("'", stream);
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emitchar (c, type, stream, '\'');
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gdb_puts ("'", stream);
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}
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/* See language.h. */
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void
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m2_language::printstr (struct ui_file *stream, struct type *elttype,
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const gdb_byte *string, unsigned int length,
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const char *encoding, int force_ellipses,
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const struct value_print_options *options) const
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{
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unsigned int i;
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unsigned int things_printed = 0;
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int in_quotes = 0;
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int need_comma = 0;
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if (length == 0)
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{
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gdb_puts ("\"\"");
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return;
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}
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for (i = 0; i < length && things_printed < options->print_max; ++i)
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{
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/* Position of the character we are examining
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to see whether it is repeated. */
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unsigned int rep1;
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/* Number of repetitions we have detected so far. */
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unsigned int reps;
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QUIT;
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if (need_comma)
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{
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gdb_puts (", ", stream);
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need_comma = 0;
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}
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rep1 = i + 1;
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reps = 1;
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while (rep1 < length && string[rep1] == string[i])
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{
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++rep1;
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++reps;
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}
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if (reps > options->repeat_count_threshold)
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{
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if (in_quotes)
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{
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gdb_puts ("\", ", stream);
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in_quotes = 0;
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}
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printchar (string[i], elttype, stream);
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gdb_printf (stream, " <repeats %u times>", reps);
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i = rep1 - 1;
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things_printed += options->repeat_count_threshold;
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need_comma = 1;
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}
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else
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{
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if (!in_quotes)
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{
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gdb_puts ("\"", stream);
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in_quotes = 1;
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}
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emitchar (string[i], elttype, stream, '"');
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++things_printed;
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}
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}
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/* Terminate the quotes if necessary. */
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if (in_quotes)
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gdb_puts ("\"", stream);
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if (force_ellipses || i < length)
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gdb_puts ("...", stream);
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}
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/* See language.h. */
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void
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m2_language::emitchar (int ch, struct type *chtype,
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struct ui_file *stream, int quoter) const
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{
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ch &= 0xFF; /* Avoid sign bit follies. */
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if (PRINT_LITERAL_FORM (ch))
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{
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if (ch == '\\' || ch == quoter)
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gdb_puts ("\\", stream);
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gdb_printf (stream, "%c", ch);
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}
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else
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{
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switch (ch)
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{
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case '\n':
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gdb_puts ("\\n", stream);
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break;
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case '\b':
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gdb_puts ("\\b", stream);
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break;
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case '\t':
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gdb_puts ("\\t", stream);
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break;
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case '\f':
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gdb_puts ("\\f", stream);
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break;
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case '\r':
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gdb_puts ("\\r", stream);
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break;
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case '\033':
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gdb_puts ("\\e", stream);
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break;
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case '\007':
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gdb_puts ("\\a", stream);
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break;
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default:
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gdb_printf (stream, "\\%.3o", (unsigned int) ch);
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break;
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}
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}
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}
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/* Called during architecture gdbarch initialisation to create language
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specific types. */
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static void *
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build_m2_types (struct gdbarch *gdbarch)
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{
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struct builtin_m2_type *builtin_m2_type
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= GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_m2_type);
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/* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */
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builtin_m2_type->builtin_int
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= arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0, "INTEGER");
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builtin_m2_type->builtin_card
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= arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "CARDINAL");
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builtin_m2_type->builtin_real
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= arch_float_type (gdbarch, gdbarch_float_bit (gdbarch), "REAL",
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gdbarch_float_format (gdbarch));
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builtin_m2_type->builtin_char
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= arch_character_type (gdbarch, TARGET_CHAR_BIT, 1, "CHAR");
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builtin_m2_type->builtin_bool
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= arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "BOOLEAN");
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return builtin_m2_type;
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}
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static struct gdbarch_data *m2_type_data;
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const struct builtin_m2_type *
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builtin_m2_type (struct gdbarch *gdbarch)
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{
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return (const struct builtin_m2_type *) gdbarch_data (gdbarch, m2_type_data);
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}
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/* Initialization for Modula-2 */
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void _initialize_m2_language ();
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void
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_initialize_m2_language ()
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{
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m2_type_data = gdbarch_data_register_post_init (build_m2_types);
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}
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