469 lines
14 KiB
C
469 lines
14 KiB
C
/* Modula 2 language support routines for GDB, the GNU debugger.
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Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000
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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., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, 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 "m2-lang.h"
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#include "c-lang.h"
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#include "valprint.h"
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extern void _initialize_m2_language (void);
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static struct type *m2_create_fundamental_type (struct objfile *, int);
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static void m2_printstr (struct ui_file * stream, char *string,
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unsigned int length, int width,
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int force_ellipses);
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static void m2_printchar (int, struct ui_file *);
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static void m2_emit_char (int, struct ui_file *, int);
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/* Print the character C on STREAM as part of the contents of a literal
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string whose delimiter is QUOTER. Note that that format for printing
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characters and strings is language specific.
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FIXME: This is a copy of the same function from c-exp.y. It should
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be replaced with a true Modula version.
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*/
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static void
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m2_emit_char (register int c, struct ui_file *stream, int quoter)
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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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if (c == '\\' || c == quoter)
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{
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fputs_filtered ("\\", stream);
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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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switch (c)
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{
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case '\n':
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fputs_filtered ("\\n", stream);
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break;
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case '\b':
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fputs_filtered ("\\b", stream);
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break;
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case '\t':
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fputs_filtered ("\\t", stream);
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break;
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case '\f':
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fputs_filtered ("\\f", stream);
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break;
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case '\r':
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fputs_filtered ("\\r", stream);
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break;
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case '\033':
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fputs_filtered ("\\e", stream);
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break;
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case '\007':
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fputs_filtered ("\\a", stream);
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break;
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default:
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fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
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break;
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}
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}
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}
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/* FIXME: This is a copy of the same function from c-exp.y. It should
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be replaced with a true Modula version. */
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static void
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m2_printchar (int c, struct ui_file *stream)
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{
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fputs_filtered ("'", stream);
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LA_EMIT_CHAR (c, stream, '\'');
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fputs_filtered ("'", stream);
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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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FIXME: This is a copy of the same function from c-exp.y. It should
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be replaced with a true Modula version. */
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static void
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m2_printstr (struct ui_file *stream, char *string, unsigned int length,
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int width, 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_quotes = 0;
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int need_comma = 0;
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extern int inspect_it;
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if (length == 0)
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{
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fputs_filtered ("\"\"", gdb_stdout);
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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_comma)
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{
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fputs_filtered (", ", 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 > repeat_count_threshold)
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{
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if (in_quotes)
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{
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if (inspect_it)
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fputs_filtered ("\\\", ", stream);
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else
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fputs_filtered ("\", ", stream);
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in_quotes = 0;
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}
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m2_printchar (string[i], 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_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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if (inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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in_quotes = 1;
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}
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LA_EMIT_CHAR (string[i], 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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{
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if (inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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}
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if (force_ellipses || i < length)
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fputs_filtered ("...", stream);
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}
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/* FIXME: This is a copy of c_create_fundamental_type(), before
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all the non-C types were stripped from it. Needs to be fixed
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by an experienced Modula programmer. */
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static struct type *
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m2_create_fundamental_type (struct objfile *objfile, 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,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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0, "<?type?>", objfile);
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warning ("internal error: no Modula fundamental type %d", typeid);
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break;
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case FT_VOID:
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type = init_type (TYPE_CODE_VOID,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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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,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "boolean", objfile);
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break;
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case FT_STRING:
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type = init_type (TYPE_CODE_STRING,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "string", objfile);
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break;
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case FT_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "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,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "signed char", objfile);
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break;
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case FT_UNSIGNED_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
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break;
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case FT_SHORT:
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type = init_type (TYPE_CODE_INT,
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
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0, "short", objfile);
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break;
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case FT_SIGNED_SHORT:
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type = init_type (TYPE_CODE_INT,
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
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0, "short", objfile); /* FIXME-fnf */
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break;
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case FT_UNSIGNED_SHORT:
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type = init_type (TYPE_CODE_INT,
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
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break;
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case FT_INTEGER:
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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0, "int", objfile);
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break;
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case FT_SIGNED_INTEGER:
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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0, "int", objfile); /* FIXME -fnf */
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break;
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case FT_UNSIGNED_INTEGER:
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
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break;
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case FT_FIXED_DECIMAL:
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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0, "fixed decimal", objfile);
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break;
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case FT_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_BIT / TARGET_CHAR_BIT,
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0, "long", objfile);
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break;
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case FT_SIGNED_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_BIT / TARGET_CHAR_BIT,
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0, "long", objfile); /* FIXME -fnf */
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break;
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case FT_UNSIGNED_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
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break;
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case FT_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
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0, "long long", objfile);
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break;
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case FT_SIGNED_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
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0, "signed long long", objfile);
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break;
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case FT_UNSIGNED_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
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break;
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case FT_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
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0, "float", 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,
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TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
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0, "double", objfile);
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break;
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case FT_FLOAT_DECIMAL:
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type = init_type (TYPE_CODE_FLT,
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TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
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0, "floating decimal", objfile);
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break;
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case FT_EXT_PREC_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
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0, "long double", objfile);
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break;
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case FT_COMPLEX:
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type = init_type (TYPE_CODE_COMPLEX,
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2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
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0, "complex", objfile);
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TYPE_TARGET_TYPE (type)
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= m2_create_fundamental_type (objfile, FT_FLOAT);
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break;
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case FT_DBL_PREC_COMPLEX:
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type = init_type (TYPE_CODE_COMPLEX,
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2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
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0, "double complex", objfile);
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TYPE_TARGET_TYPE (type)
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= m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
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break;
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case FT_EXT_PREC_COMPLEX:
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type = init_type (TYPE_CODE_COMPLEX,
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2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
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0, "long double complex", objfile);
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TYPE_TARGET_TYPE (type)
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= m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT);
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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 m2_op_print_tab[] =
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{
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{"+", BINOP_ADD, PREC_ADD, 0},
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{"+", UNOP_PLUS, PREC_PREFIX, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"-", UNOP_NEG, PREC_PREFIX, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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{"/", BINOP_DIV, PREC_MUL, 0},
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{"DIV", BINOP_INTDIV, PREC_MUL, 0},
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{"MOD", BINOP_REM, PREC_MUL, 0},
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{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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{"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
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{"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
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{"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
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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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{"^", UNOP_IND, PREC_PREFIX, 0},
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{"@", BINOP_REPEAT, PREC_REPEAT, 0},
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{"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0},
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{"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0},
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{"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0},
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{"FLOAT", UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0},
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{"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0},
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{"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0},
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{"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0},
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{"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0},
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{"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0},
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{NULL, 0, 0, 0}
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};
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/* The built-in types of Modula-2. */
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struct type *builtin_type_m2_char;
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struct type *builtin_type_m2_int;
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struct type *builtin_type_m2_card;
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struct type *builtin_type_m2_real;
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struct type *builtin_type_m2_bool;
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struct type **CONST_PTR (m2_builtin_types[]) =
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{
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&builtin_type_m2_char,
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&builtin_type_m2_int,
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&builtin_type_m2_card,
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&builtin_type_m2_real,
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&builtin_type_m2_bool,
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0
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};
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const struct language_defn m2_language_defn =
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{
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"modula-2",
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language_m2,
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m2_builtin_types,
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range_check_on,
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type_check_on,
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case_sensitive_on,
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m2_parse, /* parser */
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m2_error, /* parser error function */
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evaluate_subexp_standard,
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m2_printchar, /* Print character constant */
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m2_printstr, /* function to print string constant */
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m2_emit_char, /* Function to print a single character */
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m2_create_fundamental_type, /* Create fundamental type in this language */
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m2_print_type, /* Print a type using appropriate syntax */
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m2_val_print, /* Print a value using appropriate syntax */
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c_value_print, /* Print a top-level value */
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{"", "", "", ""}, /* Binary format info */
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{"%loB", "", "o", "B"}, /* Octal format info */
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{"%ld", "", "d", ""}, /* Decimal format info */
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{"0%lXH", "0", "X", "H"}, /* Hex format info */
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m2_op_print_tab, /* expression operators for printing */
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0, /* arrays are first-class (not c-style) */
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0, /* String lower bound */
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&builtin_type_m2_char, /* Type of string elements */
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LANG_MAGIC
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};
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/* Initialization for Modula-2 */
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void
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_initialize_m2_language (void)
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{
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/* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */
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builtin_type_m2_int =
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init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
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0,
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"INTEGER", (struct objfile *) NULL);
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builtin_type_m2_card =
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init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED,
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"CARDINAL", (struct objfile *) NULL);
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builtin_type_m2_real =
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init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
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0,
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"REAL", (struct objfile *) NULL);
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builtin_type_m2_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_m2_bool =
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init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED,
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"BOOLEAN", (struct objfile *) NULL);
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add_language (&m2_language_defn);
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}
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