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- /* Source-language-related definitions for GDB.
- Copyright 1991, 1992 Free Software Foundation, Inc.
- Contributed by the Department of Computer Science at the State University
- of New York at Buffalo.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #if !defined (LANGUAGE_H)
- #define LANGUAGE_H 1
-
- #ifdef __STDC__ /* Forward decls for prototypes */
- struct value;
- struct objfile;
- /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */
- #endif
-
- /* This used to be included to configure GDB for one or more specific
- languages. Now it is shortcutted to configure for all of them. FIXME. */
- /* #include "lang_def.h" */
- #define _LANG_c
- #define _LANG_m2
- #define _LANG_chill
- #define _LANG_fortran
-
- #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */
-
- /* range_mode ==
- range_mode_auto: range_check set automatically to default of language.
- range_mode_manual: range_check set manually by user. */
-
- extern enum range_mode {range_mode_auto, range_mode_manual} range_mode;
-
- /* range_check ==
- range_check_on: Ranges are checked in GDB expressions, producing errors.
- range_check_warn: Ranges are checked, producing warnings.
- range_check_off: Ranges are not checked in GDB expressions. */
-
- extern enum range_check
- {range_check_off, range_check_warn, range_check_on} range_check;
-
- /* type_mode ==
- type_mode_auto: type_check set automatically to default of language
- type_mode_manual: type_check set manually by user. */
-
- extern enum type_mode {type_mode_auto, type_mode_manual} type_mode;
-
- /* type_check ==
- type_check_on: Types are checked in GDB expressions, producing errors.
- type_check_warn: Types are checked, producing warnings.
- type_check_off: Types are not checked in GDB expressions. */
-
- extern enum type_check
- {type_check_off, type_check_warn, type_check_on} type_check;
-
- /* Information for doing language dependent formatting of printed values. */
-
- struct language_format_info
- {
- /* The format that can be passed directly to standard C printf functions
- to generate a completely formatted value in the format appropriate for
- the language. */
-
- char *la_format;
-
- /* The prefix to be used when directly printing a value, or constructing
- a standard C printf format. This generally is everything up to the
- conversion specification (the part introduced by the '%' character
- and terminated by the conversion specifier character). */
-
- char *la_format_prefix;
-
- /* The conversion specifier. This is generally everything after the
- field width and precision, typically only a single character such
- as 'o' for octal format or 'x' for hexadecimal format. */
-
- char *la_format_specifier;
-
- /* The suffix to be used when directly printing a value, or constructing
- a standard C printf format. This generally is everything after the
- conversion specification (the part introduced by the '%' character
- and terminated by the conversion specifier character). */
-
- char *la_format_suffix; /* Suffix for custom format string */
- };
-
- /* Structure tying together assorted information about a language. */
-
- struct language_defn
- {
- /* Name of the language */
-
- char *la_name;
-
- /* its symtab language-enum (defs.h) */
-
- enum language la_language;
-
- /* Its builtin types. This is a vector ended by a NULL pointer. These
- types can be specified by name in parsing types in expressions,
- regardless of whether the program being debugged actually defines
- such a type. */
-
- struct type ** const *la_builtin_type_vector;
-
- /* Default range checking */
-
- enum range_check la_range_check;
-
- /* Default type checking */
-
- enum type_check la_type_check;
-
- /* Parser function. */
-
- int (*la_parser) PARAMS((void));
-
- /* Parser error function */
-
- void (*la_error) PARAMS ((char *));
-
- void (*la_printchar) PARAMS ((int, GDB_FILE *));
-
- void (*la_printstr) PARAMS ((GDB_FILE *, char *, unsigned int, int));
-
- struct type *(*la_fund_type) PARAMS ((struct objfile *, int));
-
- /* Print a type using syntax appropriate for this language. */
-
- void (*la_print_type) PARAMS ((struct type *, char *, GDB_FILE *, int, int));
-
- /* Print a value using syntax appropriate for this language. */
-
- int (*la_val_print) PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *,
- int, int, int, enum val_prettyprint));
-
- /* Print a top-level value using syntax appropriate for this language. */
-
- int (*la_value_print) PARAMS ((struct value *, GDB_FILE *,
- int, enum val_prettyprint));
-
- /* Base 2 (binary) formats. */
-
- struct language_format_info la_binary_format;
-
- /* Base 8 (octal) formats. */
-
- struct language_format_info la_octal_format;
-
- /* Base 10 (decimal) formats */
-
- struct language_format_info la_decimal_format;
-
- /* Base 16 (hexadecimal) formats */
-
- struct language_format_info la_hex_format;
-
- /* Table for printing expressions */
-
- const struct op_print *la_op_print_tab;
-
- /* Zero if the language has first-class arrays. True if there are no
- array values, and array objects decay to pointers, as in C. */
-
- char c_style_arrays;
-
- /* Index to use for extracting the first element of a string. */
- char string_lower_bound;
-
- /* Type of elements of strings. */
- struct type **string_char_type;
-
- /* Add fields above this point, so the magic number is always last. */
- /* Magic number for compat checking */
-
- long la_magic;
-
- };
-
- #define LANG_MAGIC 910823L
-
- /* Pointer to the language_defn for our current language. This pointer
- always points to *some* valid struct; it can be used without checking
- it for validity.
-
- The current language affects expression parsing and evaluation
- (FIXME: it might be cleaner to make the evaluation-related stuff
- separate exp_opcodes for each different set of semantics. We
- should at least think this through more clearly with respect to
- what happens if the language is changed between parsing and
- evaluation) and printing of things like types and arrays. It does
- *not* affect symbol-reading-- each source file in a symbol-file has
- its own language and we should keep track of that regardless of the
- language when symbols are read. If we want some manual setting for
- the language of symbol files (e.g. detecting when ".c" files are
- C++), it should be a seprate setting from the current_language. */
-
- extern const struct language_defn *current_language;
-
- /* Pointer to the language_defn expected by the user, e.g. the language
- of main(), or the language we last mentioned in a message, or C. */
-
- extern const struct language_defn *expected_language;
-
- /* language_mode ==
- language_mode_auto: current_language automatically set upon selection
- of scope (e.g. stack frame)
- language_mode_manual: current_language set only by user. */
-
- extern enum language_mode
- {language_mode_auto, language_mode_manual} language_mode;
-
- /* These macros define the behaviour of the expression
- evaluator. */
-
- /* Should we strictly type check expressions? */
- #define STRICT_TYPE (type_check != type_check_off)
-
- /* Should we range check values against the domain of their type? */
- #define RANGE_CHECK (range_check != range_check_off)
-
- /* "cast" really means conversion */
- /* FIXME -- should be a setting in language_defn */
- #define CAST_IS_CONVERSION (current_language->la_language == language_c || \
- current_language->la_language == language_cplus)
-
- extern void
- language_info PARAMS ((int));
-
- extern void
- set_language PARAMS ((enum language));
-
-
- /* This page contains functions that return things that are
- specific to languages. Each of these functions is based on
- the current setting of working_lang, which the user sets
- with the "set language" command. */
-
- #define create_fundamental_type(objfile,typeid) \
- (current_language->la_fund_type(objfile, typeid))
-
- #define LA_PRINT_TYPE(type,varstring,stream,show,level) \
- (current_language->la_print_type(type,varstring,stream,show,level))
-
- #define LA_VAL_PRINT(type,valaddr,addr,stream,fmt,deref,recurse,pretty) \
- (current_language->la_val_print(type,valaddr,addr,stream,fmt,deref, \
- recurse,pretty))
- #define LA_VALUE_PRINT(val,stream,fmt,pretty) \
- (current_language->la_value_print(val,stream,fmt,pretty))
-
- /* Return a format string for printf that will print a number in one of
- the local (language-specific) formats. Result is static and is
- overwritten by the next call. Takes printf options like "08" or "l"
- (to produce e.g. %08x or %lx). */
-
- #define local_binary_format() \
- (current_language->la_binary_format.la_format)
- #define local_binary_format_prefix() \
- (current_language->la_binary_format.la_format_prefix)
- #define local_binary_format_specifier() \
- (current_language->la_binary_format.la_format_specifier)
- #define local_binary_format_suffix() \
- (current_language->la_binary_format.la_format_suffix)
-
- #define local_octal_format() \
- (current_language->la_octal_format.la_format)
- #define local_octal_format_prefix() \
- (current_language->la_octal_format.la_format_prefix)
- #define local_octal_format_specifier() \
- (current_language->la_octal_format.la_format_specifier)
- #define local_octal_format_suffix() \
- (current_language->la_octal_format.la_format_suffix)
-
- #define local_decimal_format() \
- (current_language->la_decimal_format.la_format)
- #define local_decimal_format_prefix() \
- (current_language->la_decimal_format.la_format_prefix)
- #define local_decimal_format_specifier() \
- (current_language->la_decimal_format.la_format_specifier)
- #define local_decimal_format_suffix() \
- (current_language->la_decimal_format.la_format_suffix)
-
- #define local_hex_format() \
- (current_language->la_hex_format.la_format)
- #define local_hex_format_prefix() \
- (current_language->la_hex_format.la_format_prefix)
- #define local_hex_format_specifier() \
- (current_language->la_hex_format.la_format_specifier)
- #define local_hex_format_suffix() \
- (current_language->la_hex_format.la_format_suffix)
-
- #define LA_PRINT_CHAR(ch, stream) \
- (current_language->la_printchar(ch, stream))
- #define LA_PRINT_STRING(stream, string, length, force_ellipses) \
- (current_language->la_printstr(stream, string, length, force_ellipses))
-
- /* Test a character to decide whether it can be printed in literal form
- or needs to be printed in another representation. For example,
- in C the literal form of the character with octal value 141 is 'a'
- and the "other representation" is '\141'. The "other representation"
- is program language dependent. */
-
- #define PRINT_LITERAL_FORM(c) \
- ((c)>=0x20 && ((c)<0x7F || (c)>=0xA0) && (!sevenbit_strings || (c)<0x80))
-
- /* Return a format string for printf that will print a number in one of
- the local (language-specific) formats. Result is static and is
- overwritten by the next call. Takes printf options like "08" or "l"
- (to produce e.g. %08x or %lx). */
-
- extern char *
- local_decimal_format_custom PARAMS ((char *)); /* language.c */
-
- extern char *
- local_octal_format_custom PARAMS ((char *)); /* language.c */
-
- extern char *
- local_hex_format_custom PARAMS ((char *)); /* language.c */
-
- /* Return a string that contains a number formatted in one of the local
- (language-specific) formats. Result is static and is overwritten by
- the next call. Takes printf options like "08" or "l". */
-
- extern char *
- local_hex_string PARAMS ((unsigned long)); /* language.c */
-
- extern char *
- local_hex_string_custom PARAMS ((unsigned long, char *)); /* language.c */
-
- /* Type predicates */
-
- extern int
- simple_type PARAMS ((struct type *));
-
- extern int
- ordered_type PARAMS ((struct type *));
-
- extern int
- same_type PARAMS ((struct type *, struct type *));
-
- extern int
- integral_type PARAMS ((struct type *));
-
- extern int
- numeric_type PARAMS ((struct type *));
-
- extern int
- character_type PARAMS ((struct type *));
-
- extern int
- boolean_type PARAMS ((struct type *));
-
- extern int
- float_type PARAMS ((struct type *));
-
- extern int
- pointer_type PARAMS ((struct type *));
-
- extern int
- structured_type PARAMS ((struct type *));
-
- /* Checks Binary and Unary operations for semantic type correctness */
- /* FIXME: Does not appear to be used */
- #define unop_type_check(v,o) binop_type_check((v),NULL,(o))
-
- extern void
- binop_type_check PARAMS ((struct value *, struct value *, int));
-
- /* Error messages */
-
- extern void
- op_error PARAMS ((char *fmt, enum exp_opcode, int));
-
- #define type_op_error(f,o) \
- op_error((f),(o),type_check==type_check_on ? 1 : 0)
- #define range_op_error(f,o) \
- op_error((f),(o),range_check==range_check_on ? 1 : 0)
-
- extern void
- type_error ();
-
- void
- range_error ();
-
- /* Data: Does this value represent "truth" to the current language? */
-
- extern int
- value_true PARAMS ((struct value *));
-
- /* Misc: The string representing a particular enum language. */
-
- extern const struct language_defn *
- language_def PARAMS ((enum language));
-
- extern char *
- language_str PARAMS ((enum language));
-
- /* Add a language to the set known by GDB (at initialization time). */
-
- extern void
- add_language PARAMS ((const struct language_defn *));
-
- extern enum language
- get_frame_language PARAMS ((void)); /* In stack.c */
-
- #endif /* defined (LANGUAGE_H) */
-