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/* Modula 2 language support routines for GDB, the GNU debugger.

   Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000

   Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include "defs.h"

#include "symtab.h"

#include "gdbtypes.h"

#include "expression.h"

#include "parser-defs.h"

#include "language.h"

#include "m2-lang.h"

#include "c-lang.h"

#include "valprint.h"

extern void _initialize_m2_language (void);

static struct type *m2_create_fundamental_type (struct objfile *, int);

static void m2_printstr (struct ui_file * stream, char *string,

                         unsigned int length, int width,

                         int force_ellipses);

static void m2_printchar (int, struct ui_file *);

static void m2_emit_char (int, struct ui_file *, int);

/* Print the character C on STREAM as part of the contents of a literal

   string whose delimiter is QUOTER.  Note that that format for printing

   characters and strings is language specific.

   FIXME:  This is a copy of the same function from c-exp.y.  It should

   be replaced with a true Modula version.

 */

static void

m2_emit_char (register int c, struct ui_file *stream, int quoter)

{

  c &= 0xFF;                    /* Avoid sign bit follies */

  if (PRINT_LITERAL_FORM (c))

    {

      if (c == '\\' || c == quoter)

        {

          fputs_filtered ("\\", stream);

        }

      fprintf_filtered (stream, "%c", c);

    }

  else

    {

      switch (c)

        {

        case '\n':

          fputs_filtered ("\\n", stream);

          break;

        case '\b':

          fputs_filtered ("\\b", stream);

          break;

        case '\t':

          fputs_filtered ("\\t", stream);

          break;

        case '\f':

          fputs_filtered ("\\f", stream);

          break;

        case '\r':

          fputs_filtered ("\\r", stream);

          break;

        case '\033':

          fputs_filtered ("\\e", stream);

          break;

        case '\007':

          fputs_filtered ("\\a", stream);

          break;

        default:

          fprintf_filtered (stream, "\\%.3o", (unsigned int) c);

          break;

        }

    }

}

/* FIXME:  This is a copy of the same function from c-exp.y.  It should

   be replaced with a true Modula version. */

static void

m2_printchar (int c, struct ui_file *stream)

{

  fputs_filtered ("'", stream);

  LA_EMIT_CHAR (c, stream, '\'');

  fputs_filtered ("'", stream);

}

/* Print the character string STRING, printing at most LENGTH characters.

   Printing stops early if the number hits print_max; repeat counts

   are printed as appropriate.  Print ellipses at the end if we

   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.

   FIXME:  This is a copy of the same function from c-exp.y.  It should

   be replaced with a true Modula version. */

static void

m2_printstr (struct ui_file *stream, char *string, unsigned int length,

             int width, int force_ellipses)

{

  register unsigned int i;

  unsigned int things_printed = 0;

  int in_quotes = 0;

  int need_comma = 0;

  extern int inspect_it;

  if (length == 0)

    {

      fputs_filtered ("\"\"", gdb_stdout);

      return;

    }

  for (i = 0; i < length && things_printed < print_max; ++i)

    {

      /* Position of the character we are examining

         to see whether it is repeated.  */

      unsigned int rep1;

      /* Number of repetitions we have detected so far.  */

      unsigned int reps;

      QUIT;

      if (need_comma)

        {

          fputs_filtered (", ", stream);

          need_comma = 0;

        }

      rep1 = i + 1;

      reps = 1;

      while (rep1 < length && string[rep1] == string[i])

        {

          ++rep1;

          ++reps;

        }

      if (reps > repeat_count_threshold)

        {

          if (in_quotes)

            {

              if (inspect_it)

                fputs_filtered ("\\\", ", stream);

              else

                fputs_filtered ("\", ", stream);

              in_quotes = 0;

            }

          m2_printchar (string[i], stream);

          fprintf_filtered (stream, " <repeats %u times>", reps);

          i = rep1 - 1;

          things_printed += repeat_count_threshold;

          need_comma = 1;

        }

      else

        {

          if (!in_quotes)

            {

              if (inspect_it)

                fputs_filtered ("\\\"", stream);

              else

                fputs_filtered ("\"", stream);

              in_quotes = 1;

            }

          LA_EMIT_CHAR (string[i], stream, '"');

          ++things_printed;

        }

    }

  /* Terminate the quotes if necessary.  */

  if (in_quotes)

    {

      if (inspect_it)

        fputs_filtered ("\\\"", stream);

      else

        fputs_filtered ("\"", stream);

    }

  if (force_ellipses || i < length)

    fputs_filtered ("...", stream);

}

/* FIXME:  This is a copy of c_create_fundamental_type(), before

   all the non-C types were stripped from it.  Needs to be fixed

   by an experienced Modula programmer. */

static struct type *

m2_create_fundamental_type (struct objfile *objfile, int typeid)

{

  register struct type *type = NULL;

  switch (typeid)

    {

    default:

      /* FIXME:  For now, if we are asked to produce a type not in this

         language, create the equivalent of a C integer type with the

         name "<?type?>".  When all the dust settles from the type

         reconstruction work, this should probably become an error. */

      type = init_type (TYPE_CODE_INT,

                        TARGET_INT_BIT / TARGET_CHAR_BIT,

                        0, "<?type?>", objfile);

      warning ("internal error: no Modula fundamental type %d", typeid);

      break;

    case FT_VOID:

      type = init_type (TYPE_CODE_VOID,

                        TARGET_CHAR_BIT / TARGET_CHAR_BIT,

                        0, "void", objfile);

      break;

    case FT_BOOLEAN:

      type = init_type (TYPE_CODE_BOOL,

                        TARGET_CHAR_BIT / TARGET_CHAR_BIT,

                        TYPE_FLAG_UNSIGNED, "boolean", objfile);

      break;

    case FT_STRING:

      type = init_type (TYPE_CODE_STRING,

                        TARGET_CHAR_BIT / TARGET_CHAR_BIT,

                        0, "string", objfile);

      break;

    case FT_CHAR:

      type = init_type (TYPE_CODE_INT,

                        TARGET_CHAR_BIT / TARGET_CHAR_BIT,

                        0, "char", objfile);

      break;

    case FT_SIGNED_CHAR:

      type = init_type (TYPE_CODE_INT,

                        TARGET_CHAR_BIT / TARGET_CHAR_BIT,

                        0, "signed char", objfile);

      break;

    case FT_UNSIGNED_CHAR:

      type = init_type (TYPE_CODE_INT,

                        TARGET_CHAR_BIT / TARGET_CHAR_BIT,

                        TYPE_FLAG_UNSIGNED, "unsigned char", objfile);

      break;

    case FT_SHORT:

      type = init_type (TYPE_CODE_INT,

                        TARGET_SHORT_BIT / TARGET_CHAR_BIT,

                        0, "short", objfile);

      break;

    case FT_SIGNED_SHORT:

      type = init_type (TYPE_CODE_INT,

                        TARGET_SHORT_BIT / TARGET_CHAR_BIT,

                        0, "short", objfile);    /* FIXME-fnf */

      break;

    case FT_UNSIGNED_SHORT:

      type = init_type (TYPE_CODE_INT,

                        TARGET_SHORT_BIT / TARGET_CHAR_BIT,

                        TYPE_FLAG_UNSIGNED, "unsigned short", objfile);

      break;

    case FT_INTEGER:

      type = init_type (TYPE_CODE_INT,

                        TARGET_INT_BIT / TARGET_CHAR_BIT,

                        0, "int", objfile);

      break;

    case FT_SIGNED_INTEGER:

      type = init_type (TYPE_CODE_INT,

                        TARGET_INT_BIT / TARGET_CHAR_BIT,

                        0, "int", objfile);      /* FIXME -fnf */

      break;

    case FT_UNSIGNED_INTEGER:

      type = init_type (TYPE_CODE_INT,

                        TARGET_INT_BIT / TARGET_CHAR_BIT,

                        TYPE_FLAG_UNSIGNED, "unsigned int", objfile);

      break;

    case FT_FIXED_DECIMAL:

      type = init_type (TYPE_CODE_INT,

                        TARGET_INT_BIT / TARGET_CHAR_BIT,

                        0, "fixed decimal", objfile);

      break;

    case FT_LONG:

      type = init_type (TYPE_CODE_INT,

                        TARGET_LONG_BIT / TARGET_CHAR_BIT,

                        0, "long", objfile);

      break;

    case FT_SIGNED_LONG:

      type = init_type (TYPE_CODE_INT,

                        TARGET_LONG_BIT / TARGET_CHAR_BIT,

                        0, "long", objfile);     /* FIXME -fnf */

      break;

    case FT_UNSIGNED_LONG:

      type = init_type (TYPE_CODE_INT,

                        TARGET_LONG_BIT / TARGET_CHAR_BIT,

                        TYPE_FLAG_UNSIGNED, "unsigned long", objfile);

      break;

    case FT_LONG_LONG:

      type = init_type (TYPE_CODE_INT,

                        TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,

                        0, "long long", objfile);

      break;

    case FT_SIGNED_LONG_LONG:

      type = init_type (TYPE_CODE_INT,

                        TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,

                        0, "signed long long", objfile);

      break;

    case FT_UNSIGNED_LONG_LONG:

      type = init_type (TYPE_CODE_INT,

                        TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,

                        TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);

      break;

    case FT_FLOAT:

      type = init_type (TYPE_CODE_FLT,

                        TARGET_FLOAT_BIT / TARGET_CHAR_BIT,

                        0, "float", objfile);

      break;

    case FT_DBL_PREC_FLOAT:

      type = init_type (TYPE_CODE_FLT,

                        TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,

                        0, "double", objfile);

      break;

    case FT_FLOAT_DECIMAL:

      type = init_type (TYPE_CODE_FLT,

                        TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,

                        0, "floating decimal", objfile);

      break;

    case FT_EXT_PREC_FLOAT:

      type = init_type (TYPE_CODE_FLT,

                        TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,

                        0, "long double", objfile);

      break;

    case FT_COMPLEX:

      type = init_type (TYPE_CODE_COMPLEX,

                        2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,

                        0, "complex", objfile);

      TYPE_TARGET_TYPE (type)

        = m2_create_fundamental_type (objfile, FT_FLOAT);

      break;

    case FT_DBL_PREC_COMPLEX:

      type = init_type (TYPE_CODE_COMPLEX,

                        2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,

                        0, "double complex", objfile);

      TYPE_TARGET_TYPE (type)

        = m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT);

      break;

    case FT_EXT_PREC_COMPLEX:

      type = init_type (TYPE_CODE_COMPLEX,

                        2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,

                        0, "long double complex", objfile);

      TYPE_TARGET_TYPE (type)

        = m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT);

      break;

    }

  return (type);

}

/* Table of operators and their precedences for printing expressions.  */

static const struct op_print m2_op_print_tab[] =

{

  {"+", BINOP_ADD, PREC_ADD, 0},

  {"+", UNOP_PLUS, PREC_PREFIX, 0},

  {"-", BINOP_SUB, PREC_ADD, 0},

  {"-", UNOP_NEG, PREC_PREFIX, 0},

  {"*", BINOP_MUL, PREC_MUL, 0},

  {"/", BINOP_DIV, PREC_MUL, 0},

  {"DIV", BINOP_INTDIV, PREC_MUL, 0},

  {"MOD", BINOP_REM, PREC_MUL, 0},

  {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},

  {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},

  {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},

  {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},

  {"=", BINOP_EQUAL, PREC_EQUAL, 0},

  {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0},

  {"<=", BINOP_LEQ, PREC_ORDER, 0},

  {">=", BINOP_GEQ, PREC_ORDER, 0},

  {">", BINOP_GTR, PREC_ORDER, 0},

  {"<", BINOP_LESS, PREC_ORDER, 0},

  {"^", UNOP_IND, PREC_PREFIX, 0},

  {"@", BINOP_REPEAT, PREC_REPEAT, 0},

  {"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0},

  {"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0},

  {"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0},

  {"FLOAT", UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0},

  {"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0},

  {"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0},

  {"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0},

  {"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0},

  {"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0},

  {NULL, 0, 0, 0}

};

/* The built-in types of Modula-2.  */

struct type *builtin_type_m2_char;

struct type *builtin_type_m2_int;

struct type *builtin_type_m2_card;

struct type *builtin_type_m2_real;

struct type *builtin_type_m2_bool;

struct type **CONST_PTR (m2_builtin_types[]) =

{

  &builtin_type_m2_char,

    &builtin_type_m2_int,

    &builtin_type_m2_card,

    &builtin_type_m2_real,

    &builtin_type_m2_bool,

};

const struct language_defn m2_language_defn =

{

  "modula-2",

  language_m2,

  m2_builtin_types,

  range_check_on,

  type_check_on,

  case_sensitive_on,

  m2_parse,                     /* parser */

  m2_error,                     /* parser error function */

  evaluate_subexp_standard,

  m2_printchar,                 /* Print character constant */

  m2_printstr,                  /* function to print string constant */

  m2_emit_char,                 /* Function to print a single character */

  m2_create_fundamental_type,   /* Create fundamental type in this language */

  m2_print_type,                /* Print a type using appropriate syntax */

  m2_val_print,                 /* Print a value using appropriate syntax */

  c_value_print,                /* Print a top-level value */

  {"", "", "", ""},             /* Binary format info */

  {"%loB", "", "o", "B"},       /* Octal format info */

  {"%ld", "", "d", ""},         /* Decimal format info */

  {"0%lXH", "0", "X", "H"},      /* Hex format info */

  m2_op_print_tab,              /* expression operators for printing */

  0,                             /* arrays are first-class (not c-style) */

  0,                             /* String lower bound */

  &builtin_type_m2_char,        /* Type of string elements */

  LANG_MAGIC

};

/* Initialization for Modula-2 */

void

_initialize_m2_language (void)

{

  /* Modula-2 "pervasive" types.  NOTE:  these can be redefined!!! */

  builtin_type_m2_int =

    init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,

               0,

               "INTEGER", (struct objfile *) NULL);

  builtin_type_m2_card =

    init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,

               TYPE_FLAG_UNSIGNED,

               "CARDINAL", (struct objfile *) NULL);

  builtin_type_m2_real =

    init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,

               0,

               "REAL", (struct objfile *) NULL);

  builtin_type_m2_char =

    init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,

               TYPE_FLAG_UNSIGNED,

               "CHAR", (struct objfile *) NULL);

  builtin_type_m2_bool =

    init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,

               TYPE_FLAG_UNSIGNED,

               "BOOLEAN", (struct objfile *) NULL);

  add_language (&m2_language_defn);

}