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1181 |
sfurman |
/* Modula 2 language support routines for GDB, the GNU debugger.
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Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2002
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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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| 48 |
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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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| 68 |
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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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| 93 |
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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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| 104 |
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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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| 141 |
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}
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| 142 |
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| 143 |
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rep1 = i + 1;
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reps = 1;
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| 145 |
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while (rep1 < length && string[rep1] == string[i])
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| 146 |
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{
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| 147 |
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++rep1;
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| 148 |
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++reps;
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| 149 |
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}
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| 150 |
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| 151 |
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if (reps > repeat_count_threshold)
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{
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| 153 |
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if (in_quotes)
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{
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| 155 |
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if (inspect_it)
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fputs_filtered ("\\\", ", stream);
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| 157 |
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else
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| 158 |
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fputs_filtered ("\", ", stream);
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| 159 |
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in_quotes = 0;
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| 160 |
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}
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| 161 |
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m2_printchar (string[i], stream);
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| 162 |
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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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| 167 |
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else
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| 168 |
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{
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| 169 |
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if (!in_quotes)
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| 170 |
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{
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| 171 |
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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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| 176 |
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}
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| 177 |
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LA_EMIT_CHAR (string[i], stream, '"');
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++things_printed;
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| 179 |
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}
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| 180 |
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}
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| 181 |
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| 182 |
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/* Terminate the quotes if necessary. */
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| 183 |
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if (in_quotes)
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| 184 |
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{
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| 185 |
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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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| 189 |
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}
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| 190 |
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| 191 |
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if (force_ellipses || i < length)
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fputs_filtered ("...", stream);
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| 193 |
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}
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| 194 |
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| 195 |
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/* FIXME: This is a copy of c_create_fundamental_type(), before
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| 196 |
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all the non-C types were stripped from it. Needs to be fixed
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| 197 |
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by an experienced Modula programmer. */
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| 198 |
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| 199 |
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static struct type *
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| 200 |
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m2_create_fundamental_type (struct objfile *objfile, int typeid)
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| 201 |
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{
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| 202 |
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register struct type *type = NULL;
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| 203 |
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| 204 |
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switch (typeid)
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| 205 |
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{
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| 206 |
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default:
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| 207 |
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/* FIXME: For now, if we are asked to produce a type not in this
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| 208 |
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language, create the equivalent of a C integer type with the
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| 209 |
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name "<?type?>". When all the dust settles from the type
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| 210 |
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reconstruction work, this should probably become an error. */
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| 211 |
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type = init_type (TYPE_CODE_INT,
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| 212 |
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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| 213 |
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0, "<?type?>", objfile);
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| 214 |
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warning ("internal error: no Modula fundamental type %d", typeid);
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| 215 |
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break;
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| 216 |
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case FT_VOID:
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| 217 |
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type = init_type (TYPE_CODE_VOID,
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| 218 |
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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| 219 |
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0, "void", objfile);
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| 220 |
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break;
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| 221 |
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case FT_BOOLEAN:
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| 222 |
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type = init_type (TYPE_CODE_BOOL,
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| 223 |
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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| 224 |
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TYPE_FLAG_UNSIGNED, "boolean", objfile);
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| 225 |
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break;
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| 226 |
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case FT_STRING:
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| 227 |
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type = init_type (TYPE_CODE_STRING,
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| 228 |
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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| 229 |
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0, "string", objfile);
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| 230 |
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break;
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| 231 |
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case FT_CHAR:
|
| 232 |
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type = init_type (TYPE_CODE_INT,
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| 233 |
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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| 234 |
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0, "char", objfile);
|
| 235 |
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break;
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| 236 |
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case FT_SIGNED_CHAR:
|
| 237 |
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type = init_type (TYPE_CODE_INT,
|
| 238 |
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
| 239 |
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0, "signed char", objfile);
|
| 240 |
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break;
|
| 241 |
|
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case FT_UNSIGNED_CHAR:
|
| 242 |
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type = init_type (TYPE_CODE_INT,
|
| 243 |
|
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
| 244 |
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TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
|
| 245 |
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break;
|
| 246 |
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case FT_SHORT:
|
| 247 |
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type = init_type (TYPE_CODE_INT,
|
| 248 |
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
| 249 |
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0, "short", objfile);
|
| 250 |
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break;
|
| 251 |
|
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case FT_SIGNED_SHORT:
|
| 252 |
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type = init_type (TYPE_CODE_INT,
|
| 253 |
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
| 254 |
|
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0, "short", objfile); /* FIXME-fnf */
|
| 255 |
|
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break;
|
| 256 |
|
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case FT_UNSIGNED_SHORT:
|
| 257 |
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type = init_type (TYPE_CODE_INT,
|
| 258 |
|
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
| 259 |
|
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TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
|
| 260 |
|
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break;
|
| 261 |
|
|
case FT_INTEGER:
|
| 262 |
|
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type = init_type (TYPE_CODE_INT,
|
| 263 |
|
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TARGET_INT_BIT / TARGET_CHAR_BIT,
|
| 264 |
|
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0, "int", objfile);
|
| 265 |
|
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break;
|
| 266 |
|
|
case FT_SIGNED_INTEGER:
|
| 267 |
|
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type = init_type (TYPE_CODE_INT,
|
| 268 |
|
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TARGET_INT_BIT / TARGET_CHAR_BIT,
|
| 269 |
|
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0, "int", objfile); /* FIXME -fnf */
|
| 270 |
|
|
break;
|
| 271 |
|
|
case FT_UNSIGNED_INTEGER:
|
| 272 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 273 |
|
|
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
| 274 |
|
|
TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
|
| 275 |
|
|
break;
|
| 276 |
|
|
case FT_FIXED_DECIMAL:
|
| 277 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 278 |
|
|
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
| 279 |
|
|
0, "fixed decimal", objfile);
|
| 280 |
|
|
break;
|
| 281 |
|
|
case FT_LONG:
|
| 282 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 283 |
|
|
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
| 284 |
|
|
0, "long", objfile);
|
| 285 |
|
|
break;
|
| 286 |
|
|
case FT_SIGNED_LONG:
|
| 287 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 288 |
|
|
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
| 289 |
|
|
0, "long", objfile); /* FIXME -fnf */
|
| 290 |
|
|
break;
|
| 291 |
|
|
case FT_UNSIGNED_LONG:
|
| 292 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 293 |
|
|
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
| 294 |
|
|
TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
|
| 295 |
|
|
break;
|
| 296 |
|
|
case FT_LONG_LONG:
|
| 297 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 298 |
|
|
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
| 299 |
|
|
0, "long long", objfile);
|
| 300 |
|
|
break;
|
| 301 |
|
|
case FT_SIGNED_LONG_LONG:
|
| 302 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 303 |
|
|
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
| 304 |
|
|
0, "signed long long", objfile);
|
| 305 |
|
|
break;
|
| 306 |
|
|
case FT_UNSIGNED_LONG_LONG:
|
| 307 |
|
|
type = init_type (TYPE_CODE_INT,
|
| 308 |
|
|
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
| 309 |
|
|
TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
|
| 310 |
|
|
break;
|
| 311 |
|
|
case FT_FLOAT:
|
| 312 |
|
|
type = init_type (TYPE_CODE_FLT,
|
| 313 |
|
|
TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
|
| 314 |
|
|
0, "float", objfile);
|
| 315 |
|
|
break;
|
| 316 |
|
|
case FT_DBL_PREC_FLOAT:
|
| 317 |
|
|
type = init_type (TYPE_CODE_FLT,
|
| 318 |
|
|
TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
|
| 319 |
|
|
0, "double", objfile);
|
| 320 |
|
|
break;
|
| 321 |
|
|
case FT_FLOAT_DECIMAL:
|
| 322 |
|
|
type = init_type (TYPE_CODE_FLT,
|
| 323 |
|
|
TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
|
| 324 |
|
|
0, "floating decimal", objfile);
|
| 325 |
|
|
break;
|
| 326 |
|
|
case FT_EXT_PREC_FLOAT:
|
| 327 |
|
|
type = init_type (TYPE_CODE_FLT,
|
| 328 |
|
|
TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
|
| 329 |
|
|
0, "long double", objfile);
|
| 330 |
|
|
break;
|
| 331 |
|
|
case FT_COMPLEX:
|
| 332 |
|
|
type = init_type (TYPE_CODE_COMPLEX,
|
| 333 |
|
|
2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
|
| 334 |
|
|
0, "complex", objfile);
|
| 335 |
|
|
TYPE_TARGET_TYPE (type)
|
| 336 |
|
|
= m2_create_fundamental_type (objfile, FT_FLOAT);
|
| 337 |
|
|
break;
|
| 338 |
|
|
case FT_DBL_PREC_COMPLEX:
|
| 339 |
|
|
type = init_type (TYPE_CODE_COMPLEX,
|
| 340 |
|
|
2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
|
| 341 |
|
|
0, "double complex", objfile);
|
| 342 |
|
|
TYPE_TARGET_TYPE (type)
|
| 343 |
|
|
= m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
|
| 344 |
|
|
break;
|
| 345 |
|
|
case FT_EXT_PREC_COMPLEX:
|
| 346 |
|
|
type = init_type (TYPE_CODE_COMPLEX,
|
| 347 |
|
|
2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
|
| 348 |
|
|
0, "long double complex", objfile);
|
| 349 |
|
|
TYPE_TARGET_TYPE (type)
|
| 350 |
|
|
= m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT);
|
| 351 |
|
|
break;
|
| 352 |
|
|
}
|
| 353 |
|
|
return (type);
|
| 354 |
|
|
}
|
| 355 |
|
|
|
| 356 |
|
|
|
| 357 |
|
|
/* Table of operators and their precedences for printing expressions. */
|
| 358 |
|
|
|
| 359 |
|
|
static const struct op_print m2_op_print_tab[] =
|
| 360 |
|
|
{
|
| 361 |
|
|
{"+", BINOP_ADD, PREC_ADD, 0},
|
| 362 |
|
|
{"+", UNOP_PLUS, PREC_PREFIX, 0},
|
| 363 |
|
|
{"-", BINOP_SUB, PREC_ADD, 0},
|
| 364 |
|
|
{"-", UNOP_NEG, PREC_PREFIX, 0},
|
| 365 |
|
|
{"*", BINOP_MUL, PREC_MUL, 0},
|
| 366 |
|
|
{"/", BINOP_DIV, PREC_MUL, 0},
|
| 367 |
|
|
{"DIV", BINOP_INTDIV, PREC_MUL, 0},
|
| 368 |
|
|
{"MOD", BINOP_REM, PREC_MUL, 0},
|
| 369 |
|
|
{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
|
| 370 |
|
|
{"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
|
| 371 |
|
|
{"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
|
| 372 |
|
|
{"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
|
| 373 |
|
|
{"=", BINOP_EQUAL, PREC_EQUAL, 0},
|
| 374 |
|
|
{"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0},
|
| 375 |
|
|
{"<=", BINOP_LEQ, PREC_ORDER, 0},
|
| 376 |
|
|
{">=", BINOP_GEQ, PREC_ORDER, 0},
|
| 377 |
|
|
{">", BINOP_GTR, PREC_ORDER, 0},
|
| 378 |
|
|
{"<", BINOP_LESS, PREC_ORDER, 0},
|
| 379 |
|
|
{"^", UNOP_IND, PREC_PREFIX, 0},
|
| 380 |
|
|
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
|
| 381 |
|
|
{"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0},
|
| 382 |
|
|
{"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0},
|
| 383 |
|
|
{"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0},
|
| 384 |
|
|
{"FLOAT", UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0},
|
| 385 |
|
|
{"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0},
|
| 386 |
|
|
{"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0},
|
| 387 |
|
|
{"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0},
|
| 388 |
|
|
{"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0},
|
| 389 |
|
|
{"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0},
|
| 390 |
|
|
{NULL, 0, 0, 0}
|
| 391 |
|
|
};
|
| 392 |
|
|
|
| 393 |
|
|
/* The built-in types of Modula-2. */
|
| 394 |
|
|
|
| 395 |
|
|
struct type *builtin_type_m2_char;
|
| 396 |
|
|
struct type *builtin_type_m2_int;
|
| 397 |
|
|
struct type *builtin_type_m2_card;
|
| 398 |
|
|
struct type *builtin_type_m2_real;
|
| 399 |
|
|
struct type *builtin_type_m2_bool;
|
| 400 |
|
|
|
| 401 |
|
|
struct type **const (m2_builtin_types[]) =
|
| 402 |
|
|
{
|
| 403 |
|
|
&builtin_type_m2_char,
|
| 404 |
|
|
&builtin_type_m2_int,
|
| 405 |
|
|
&builtin_type_m2_card,
|
| 406 |
|
|
&builtin_type_m2_real,
|
| 407 |
|
|
&builtin_type_m2_bool,
|
| 408 |
|
|
|
| 409 |
|
|
};
|
| 410 |
|
|
|
| 411 |
|
|
const struct language_defn m2_language_defn =
|
| 412 |
|
|
{
|
| 413 |
|
|
"modula-2",
|
| 414 |
|
|
language_m2,
|
| 415 |
|
|
m2_builtin_types,
|
| 416 |
|
|
range_check_on,
|
| 417 |
|
|
type_check_on,
|
| 418 |
|
|
case_sensitive_on,
|
| 419 |
|
|
m2_parse, /* parser */
|
| 420 |
|
|
m2_error, /* parser error function */
|
| 421 |
|
|
evaluate_subexp_standard,
|
| 422 |
|
|
m2_printchar, /* Print character constant */
|
| 423 |
|
|
m2_printstr, /* function to print string constant */
|
| 424 |
|
|
m2_emit_char, /* Function to print a single character */
|
| 425 |
|
|
m2_create_fundamental_type, /* Create fundamental type in this language */
|
| 426 |
|
|
m2_print_type, /* Print a type using appropriate syntax */
|
| 427 |
|
|
m2_val_print, /* Print a value using appropriate syntax */
|
| 428 |
|
|
c_value_print, /* Print a top-level value */
|
| 429 |
|
|
{"", "", "", ""}, /* Binary format info */
|
| 430 |
|
|
{"%loB", "", "o", "B"}, /* Octal format info */
|
| 431 |
|
|
{"%ld", "", "d", ""}, /* Decimal format info */
|
| 432 |
|
|
{"0%lXH", "0", "X", "H"}, /* Hex format info */
|
| 433 |
|
|
m2_op_print_tab, /* expression operators for printing */
|
| 434 |
|
|
0, /* arrays are first-class (not c-style) */
|
| 435 |
|
|
0, /* String lower bound */
|
| 436 |
|
|
&builtin_type_m2_char, /* Type of string elements */
|
| 437 |
|
|
LANG_MAGIC
|
| 438 |
|
|
};
|
| 439 |
|
|
|
| 440 |
|
|
/* Initialization for Modula-2 */
|
| 441 |
|
|
|
| 442 |
|
|
void
|
| 443 |
|
|
_initialize_m2_language (void)
|
| 444 |
|
|
{
|
| 445 |
|
|
/* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */
|
| 446 |
|
|
builtin_type_m2_int =
|
| 447 |
|
|
init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
|
| 448 |
|
|
0,
|
| 449 |
|
|
"INTEGER", (struct objfile *) NULL);
|
| 450 |
|
|
builtin_type_m2_card =
|
| 451 |
|
|
init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
|
| 452 |
|
|
TYPE_FLAG_UNSIGNED,
|
| 453 |
|
|
"CARDINAL", (struct objfile *) NULL);
|
| 454 |
|
|
builtin_type_m2_real =
|
| 455 |
|
|
init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
|
| 456 |
|
|
0,
|
| 457 |
|
|
"REAL", (struct objfile *) NULL);
|
| 458 |
|
|
builtin_type_m2_char =
|
| 459 |
|
|
init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
| 460 |
|
|
TYPE_FLAG_UNSIGNED,
|
| 461 |
|
|
"CHAR", (struct objfile *) NULL);
|
| 462 |
|
|
builtin_type_m2_bool =
|
| 463 |
|
|
init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
|
| 464 |
|
|
TYPE_FLAG_UNSIGNED,
|
| 465 |
|
|
"BOOLEAN", (struct objfile *) NULL);
|
| 466 |
|
|
|
| 467 |
|
|
add_language (&m2_language_defn);
|
| 468 |
|
|
}
|
