* language.h, language.c: New files for language-specific macros,
declarations, and definitions.
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John Gilmore
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/* Source-language-related definitions for GDB.
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Copyright 1991 Free Software Foundation, Inc.
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Contributed by the Department of Computer Science at the State University
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of New York at Buffalo.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This used to be included to configure GDB for one or more specific
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languages. Now it is shortcutted to configure for all of them. FIXME. */
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/* #include "lang_def.h" */
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#define _LANG_c
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#define _LANG_m2
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/* range_mode ==
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range_mode_auto: range_check set automatically to default of language.
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range_mode_manual: range_check set manually by user. */
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extern enum range_mode {range_mode_auto, range_mode_manual} range_mode;
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/* range_check ==
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range_check_on: Ranges are checked in GDB expressions, producing errors.
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range_check_warn: Ranges are checked, producing warnings.
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range_check_off: Ranges are not checked in GDB expressions. */
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extern enum range_check
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{range_check_off, range_check_warn, range_check_on} range_check;
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/* type_mode ==
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type_mode_auto: type_check set automatically to default of language
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type_mode_manual: type_check set manually by user. */
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extern enum type_mode {type_mode_auto, type_mode_manual} type_mode;
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/* type_check ==
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type_check_on: Types are checked in GDB expressions, producing errors.
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type_check_warn: Types are checked, producing warnings.
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type_check_off: Types are not checked in GDB expressions. */
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extern enum type_check
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{type_check_off, type_check_warn, type_check_on} type_check;
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/* Structure tying together assorted information about a language. */
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struct language_defn {
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char * la_name; /* Name of the language */
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enum language la_language; /* its symtab language-enum (defs.h) */
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struct type ** const
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*la_builtin_type_vector; /* Its builtin types */
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enum range_check la_range_check; /* Default range checking */
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enum type_check la_type_check; /* Default type checking */
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int (*la_parser)(); /* Parser function */
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void (*la_error)(); /* Parser error function */
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struct type **la_longest_int; /* Longest signed integral type */
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struct type **la_longest_unsigned_int; /* Longest uns integral type */
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struct type **la_longest_float; /* Longest floating point type */
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char *la_hex_format; /* Hexadecimal printf format str */
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char *la_hex_format_pre; /* Prefix for custom format string */
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char *la_hex_format_suf; /* Suffix for custom format string */
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char *la_octal_format; /* Octal printf format str */
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char *la_octal_format_pre; /* Prefix for custom format string */
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char *la_octal_format_suf; /* Suffix for custom format string */
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const struct op_print
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*la_op_print_tab; /* Table for printing expressions */
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/* Add fields above this point, so the magic number is always last. */
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long la_magic; /* Magic number for compat checking */
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};
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#define LANG_MAGIC 910823L
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/* Pointer to the language_defn for our current language. This pointer
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always points to *some* valid struct; it can be used without checking
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it for validity. */
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extern struct language_defn *current_language;
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/* language_mode ==
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language_mode_auto: current_language automatically set upon selection
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of scope (e.g. stack frame)
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language_mode_manual: current_language set only by user. */
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extern enum language_mode
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{language_mode_auto, language_mode_manual} language_mode;
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/* These macros define the behaviour of the expression
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evaluator. */
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/* Should we strictly type check expressions? */
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#define STRICT_TYPE (type_check != range_check_off)
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/* Should we range check values against the domain of their type? */
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#define RANGE_CHECK (range_check != type_check_off)
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/* "cast" really means conversion */
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/* FIXME -- should be a setting in language_defn */
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#define CAST_IS_CONVERSION (current_language->la_language == language_c)
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void language_info();
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void set_language();
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/* This page contains functions that return things that are
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specific to languages. Each of these functions is based on
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the current setting of working_lang, which the user sets
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with the "set language" command. */
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/* Returns some built-in types */
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#define longest_int() (*current_language->la_longest_int)
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#define longest_unsigned_int() (*current_language->la_longest_unsigned_int)
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#define longest_float() (*current_language->la_longest_float)
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struct type *binop_result_type();
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/* Hexadecimal number formatting is in defs.h because it is so common
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throughout GDB. */
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/* Return a format string for printf that will print a number in the local
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(language-specific) octal format. Result is static and is
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overwritten by the next call. local_octal_format_custom takes printf
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options like "08" or "l" (to produce e.g. %08x or %lx). */
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#define local_octal_format() (current_language->la_octal_format)
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char *local_octal_format_custom();
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/* Type predicates */
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int simple_type();
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int ordered_type();
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int same_type();
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int integral_type();
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int numeric_type();
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int character_type();
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int boolean_type();
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int float_type();
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int pointer_type();
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int structured_type();
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/* Checks Binary and Unary operations for semantic type correctness */
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void binop_type_check();
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#define unop_type_check(v,o) binop_type_check((v),NULL,(o))
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/* Error messages */
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void op_error();
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#define type_op_error(f,o) \
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op_error((f),(o),type_check==type_check_on ? 1 : 0)
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#define range_op_error(f,o) \
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op_error((f),(o),range_check==range_check_on ? 1 : 0)
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void type_error();
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void range_error();
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/* Data: Does this value represent "truth" to the current language? */
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int value_true();
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/* Misc: The string representing a particular enum language. */
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char *language_str();
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/* Add a language to the set known by GDB (at initialization time). */
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void add_language (); /* Arg is &language_defn */
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