354 lines
10 KiB
C
354 lines
10 KiB
C
/* Chill language support routines for GDB, the GNU debugger.
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Copyright 1992 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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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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 "ch-lang.h"
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/* For now, Chill uses a simple mangling algorithm whereby you simply
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discard everything after the occurance of two successive CPLUS_MARKER
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characters to derive the demangled form. */
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char *
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chill_demangle (mangled)
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const char *mangled;
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{
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char *joiner;
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char *demangled;
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joiner = strchr (mangled, CPLUS_MARKER);
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if (joiner != NULL && *(joiner + 1) == CPLUS_MARKER)
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{
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demangled = savestring (mangled, joiner - mangled);
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}
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else
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{
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demangled = NULL;
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}
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return (demangled);
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}
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static void
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chill_printchar (c, stream)
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register int c;
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GDB_FILE *stream;
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{
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c &= 0xFF; /* Avoid sign bit follies */
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if (PRINT_LITERAL_FORM (c))
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{
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fprintf_filtered (stream, "'%c'", c);
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}
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else
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{
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fprintf_filtered (stream, "C'%.2x'", (unsigned int) c);
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}
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}
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/* Print the character string STRING, printing at most LENGTH characters.
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Printing stops early if the number hits print_max; repeat counts
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are printed as appropriate. Print ellipses at the end if we
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had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
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Note that gdb maintains the length of strings without counting the
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terminating null byte, while chill strings are typically written with
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an explicit null byte. So we always assume an implied null byte
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until gdb is able to maintain non-null terminated strings as well
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as null terminated strings (FIXME).
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*/
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static void
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chill_printstr (stream, string, length, force_ellipses)
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GDB_FILE *stream;
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char *string;
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unsigned int length;
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int force_ellipses;
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{
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register unsigned int i;
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unsigned int things_printed = 0;
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int in_literal_form = 0;
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int in_control_form = 0;
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int need_slashslash = 0;
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unsigned int c;
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extern int repeat_count_threshold;
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extern int print_max;
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if (length == 0)
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{
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fputs_filtered ("\"\"", stream);
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return;
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}
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for (i = 0; i < length && things_printed < 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_slashslash)
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{
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fputs_filtered ("//", stream);
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need_slashslash = 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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c = string[i];
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if (reps > repeat_count_threshold)
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{
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if (in_control_form || in_literal_form)
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{
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fputs_filtered ("\"//", stream);
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in_control_form = in_literal_form = 0;
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}
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chill_printchar (c, stream);
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fprintf_filtered (stream, "<repeats %u times>", reps);
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i = rep1 - 1;
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things_printed += repeat_count_threshold;
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need_slashslash = 1;
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}
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else
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{
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if (PRINT_LITERAL_FORM (c))
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{
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if (!in_literal_form)
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{
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if (in_control_form)
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{
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fputs_filtered ("\"//", stream);
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in_control_form = 0;
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}
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fputs_filtered ("\"", stream);
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in_literal_form = 1;
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}
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fprintf_filtered (stream, "%c", c);
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}
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else
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{
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if (!in_control_form)
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{
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if (in_literal_form)
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{
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fputs_filtered ("\"//", stream);
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in_literal_form = 0;
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}
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fputs_filtered ("c\"", stream);
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in_control_form = 1;
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}
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fprintf_filtered (stream, "%.2x", c);
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}
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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_literal_form || in_control_form)
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{
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fputs_filtered ("\"", stream);
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}
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if (force_ellipses || (i < length))
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{
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fputs_filtered ("...", stream);
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}
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}
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/* Return 1 if TYPE is a varying string or array. */
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int
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chill_is_varying_struct (type)
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struct type *type;
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{
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if (TYPE_CODE (type) != TYPE_CODE_STRUCT)
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return 0;
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if (TYPE_NFIELDS (type) != 2)
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return 0;
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if (strcmp (TYPE_FIELD_NAME (type, 0), "__var_length") != 0)
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return 0;
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return 1;
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}
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static struct type *
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chill_create_fundamental_type (objfile, typeid)
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struct objfile *objfile;
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int typeid;
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{
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register struct type *type = NULL;
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switch (typeid)
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{
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default:
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/* FIXME: For now, if we are asked to produce a type not in this
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language, create the equivalent of a C integer type with the
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name "<?type?>". When all the dust settles from the type
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reconstruction work, this should probably become an error. */
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type = init_type (TYPE_CODE_INT, 2, 0, "<?type?>", objfile);
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warning ("internal error: no chill fundamental type %d", typeid);
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break;
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case FT_VOID:
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/* FIXME: Currently the GNU Chill compiler emits some DWARF entries for
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typedefs, unrelated to anything directly in the code being compiled,
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that have some FT_VOID types. Just fake it for now. */
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type = init_type (TYPE_CODE_VOID, 0, 0, "<?VOID?>", objfile);
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break;
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case FT_BOOLEAN:
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type = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED, "BOOL", objfile);
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break;
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case FT_CHAR:
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type = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED, "CHAR", objfile);
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break;
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case FT_SIGNED_CHAR:
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type = init_type (TYPE_CODE_INT, 1, 0, "BYTE", objfile);
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break;
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case FT_UNSIGNED_CHAR:
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type = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, "UBYTE", objfile);
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break;
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case FT_SHORT: /* Chill ints are 2 bytes */
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type = init_type (TYPE_CODE_INT, 2, 0, "INT", objfile);
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break;
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case FT_UNSIGNED_SHORT: /* Chill ints are 2 bytes */
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type = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, "UINT", objfile);
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break;
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case FT_INTEGER: /* FIXME? */
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case FT_SIGNED_INTEGER: /* FIXME? */
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case FT_LONG: /* Chill longs are 4 bytes */
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case FT_SIGNED_LONG: /* Chill longs are 4 bytes */
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type = init_type (TYPE_CODE_INT, 4, 0, "LONG", objfile);
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break;
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case FT_UNSIGNED_INTEGER: /* FIXME? */
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case FT_UNSIGNED_LONG: /* Chill longs are 4 bytes */
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type = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "ULONG", objfile);
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break;
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case FT_FLOAT:
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type = init_type (TYPE_CODE_FLT, 4, 0, "REAL", objfile);
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break;
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case FT_DBL_PREC_FLOAT:
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type = init_type (TYPE_CODE_FLT, 8, 0, "LONG_REAL", objfile);
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break;
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}
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return (type);
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}
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/* Table of operators and their precedences for printing expressions. */
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static const struct op_print chill_op_print_tab[] = {
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{"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
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{"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
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{"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
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{"MOD", BINOP_MOD, PREC_MUL, 0},
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{"REM", BINOP_REM, PREC_MUL, 0},
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{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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{"=", BINOP_EQUAL, PREC_EQUAL, 0},
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{"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
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{"<=", BINOP_LEQ, PREC_ORDER, 0},
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{">=", BINOP_GEQ, PREC_ORDER, 0},
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{">", BINOP_GTR, PREC_ORDER, 0},
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{"<", BINOP_LESS, PREC_ORDER, 0},
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{"+", BINOP_ADD, PREC_ADD, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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{"/", BINOP_DIV, PREC_MUL, 0},
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{"//", BINOP_CONCAT, PREC_PREFIX, 0}, /* FIXME: precedence? */
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{"-", UNOP_NEG, PREC_PREFIX, 0},
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{NULL, 0, 0, 0}
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};
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/* The built-in types of Chill. */
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struct type *builtin_type_chill_bool;
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struct type *builtin_type_chill_char;
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struct type *builtin_type_chill_long;
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struct type *builtin_type_chill_ulong;
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struct type *builtin_type_chill_real;
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struct type ** const (chill_builtin_types[]) =
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{
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&builtin_type_chill_bool,
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&builtin_type_chill_char,
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&builtin_type_chill_long,
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&builtin_type_chill_ulong,
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&builtin_type_chill_real,
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0
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};
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const struct language_defn chill_language_defn = {
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"chill",
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language_chill,
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chill_builtin_types,
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range_check_on,
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type_check_on,
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chill_parse, /* parser */
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chill_error, /* parser error function */
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chill_printchar, /* print a character constant */
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chill_printstr, /* function to print a string constant */
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chill_create_fundamental_type,/* Create fundamental type in this language */
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chill_print_type, /* Print a type using appropriate syntax */
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chill_val_print, /* Print a value using appropriate syntax */
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chill_value_print, /* Print a top-levl value */
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{"", "B'", "", ""}, /* Binary format info */
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{"O'%lo", "O'", "o", ""}, /* Octal format info */
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{"D'%ld", "D'", "d", ""}, /* Decimal format info */
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{"H'%lx", "H'", "x", ""}, /* Hex format info */
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chill_op_print_tab, /* expression operators for printing */
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LANG_MAGIC
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};
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/* Initialization for Chill */
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void
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_initialize_chill_language ()
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{
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builtin_type_chill_bool =
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init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED,
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"BOOL", (struct objfile *) NULL);
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builtin_type_chill_char =
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init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED,
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"CHAR", (struct objfile *) NULL);
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builtin_type_chill_long =
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init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
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0,
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"LONG", (struct objfile *) NULL);
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builtin_type_chill_ulong =
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init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED,
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"ULONG", (struct objfile *) NULL);
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builtin_type_chill_real =
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init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
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0,
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"LONG_REAL", (struct objfile *) NULL);
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add_language (&chill_language_defn);
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}
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