/* Modula 2 language support routines for GDB, the GNU debugger. Copyright 1992 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" static struct type *m2_create_fundamental_type PARAMS ((struct objfile *, int)); static void m2_printstr PARAMS ((GDB_FILE *, char *, unsigned int, int)); static void m2_printchar PARAMS ((int, GDB_FILE *)); static void emit_char PARAMS ((int, GDB_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 emit_char (c, stream, quoter) register int c; GDB_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 (c, stream) int c; GDB_FILE *stream; { fputs_filtered ("'", stream); 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 (stream, string, length, force_ellipses) GDB_FILE *stream; char *string; unsigned int length; int force_ellipses; { register unsigned int i; unsigned int things_printed = 0; int in_quotes = 0; int need_comma = 0; extern int inspect_it; extern int repeat_count_threshold; extern int print_max; 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, " ", 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; } 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 (objfile, typeid) 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 "". 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, "", 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 (m2_builtin_types[]) = { &builtin_type_m2_char, &builtin_type_m2_int, &builtin_type_m2_card, &builtin_type_m2_real, &builtin_type_m2_bool, 0 }; const struct language_defn m2_language_defn = { "modula-2", language_m2, m2_builtin_types, range_check_on, type_check_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_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 () { /* 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); }