440 lines
14 KiB
C
440 lines
14 KiB
C
/* Source-language-related definitions for GDB.
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Copyright 1991, 1992 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#if !defined (LANGUAGE_H)
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#define LANGUAGE_H 1
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#ifdef __STDC__ /* Forward decls for prototypes */
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struct value;
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struct objfile;
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struct expression;
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/* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */
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#endif
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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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#define _LANG_chill
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#define _LANG_fortran
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#define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */
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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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/* Information for doing language dependent formatting of printed values. */
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struct language_format_info
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{
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/* The format that can be passed directly to standard C printf functions
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to generate a completely formatted value in the format appropriate for
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the language. */
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char *la_format;
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/* The prefix to be used when directly printing a value, or constructing
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a standard C printf format. This generally is everything up to the
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conversion specification (the part introduced by the '%' character
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and terminated by the conversion specifier character). */
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char *la_format_prefix;
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/* The conversion specifier. This is generally everything after the
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field width and precision, typically only a single character such
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as 'o' for octal format or 'x' for hexadecimal format. */
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char *la_format_specifier;
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/* The suffix to be used when directly printing a value, or constructing
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a standard C printf format. This generally is everything after the
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conversion specification (the part introduced by the '%' character
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and terminated by the conversion specifier character). */
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char *la_format_suffix; /* Suffix for custom format string */
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};
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/* Structure tying together assorted information about a language. */
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struct language_defn
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{
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/* Name of the language */
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char *la_name;
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/* its symtab language-enum (defs.h) */
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enum language la_language;
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/* Its builtin types. This is a vector ended by a NULL pointer. These
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types can be specified by name in parsing types in expressions,
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regardless of whether the program being debugged actually defines
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such a type. */
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struct type ** const *la_builtin_type_vector;
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/* Default range checking */
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enum range_check la_range_check;
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/* Default type checking */
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enum type_check la_type_check;
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/* Parser function. */
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int (*la_parser) PARAMS((void));
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/* Parser error function */
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void (*la_error) PARAMS ((char *));
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/* Evaluate an expression. */
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struct value * (*evaluate_exp) PARAMS ((struct type *, struct expression *,
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int *, enum noside));
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void (*la_printchar) PARAMS ((int ch, GDB_FILE *stream));
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void (*la_printstr) PARAMS ((GDB_FILE *stream, char *string,
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unsigned int length, int width,
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int force_ellipses));
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void (*la_emitchar) PARAMS ((int ch, GDB_FILE *stream, int quoter));
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struct type *(*la_fund_type) PARAMS ((struct objfile *, int));
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/* Print a type using syntax appropriate for this language. */
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void (*la_print_type) PARAMS ((struct type *, char *, GDB_FILE *, int, int));
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/* Print a value using syntax appropriate for this language. */
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int (*la_val_print) PARAMS ((struct type *, char *, int, CORE_ADDR, GDB_FILE *,
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int, int, int, enum val_prettyprint));
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/* Print a top-level value using syntax appropriate for this language. */
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int (*la_value_print) PARAMS ((struct value *, GDB_FILE *,
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int, enum val_prettyprint));
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/* Base 2 (binary) formats. */
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struct language_format_info la_binary_format;
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/* Base 8 (octal) formats. */
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struct language_format_info la_octal_format;
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/* Base 10 (decimal) formats */
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struct language_format_info la_decimal_format;
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/* Base 16 (hexadecimal) formats */
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struct language_format_info la_hex_format;
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/* Table for printing expressions */
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const struct op_print *la_op_print_tab;
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/* Zero if the language has first-class arrays. True if there are no
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array values, and array objects decay to pointers, as in C. */
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char c_style_arrays;
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/* Index to use for extracting the first element of a string. */
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char string_lower_bound;
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/* Type of elements of strings. */
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struct type **string_char_type;
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/* Add fields above this point, so the magic number is always last. */
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/* Magic number for compat checking */
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long la_magic;
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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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The current language affects expression parsing and evaluation
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(FIXME: it might be cleaner to make the evaluation-related stuff
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separate exp_opcodes for each different set of semantics. We
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should at least think this through more clearly with respect to
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what happens if the language is changed between parsing and
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evaluation) and printing of things like types and arrays. It does
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*not* affect symbol-reading-- each source file in a symbol-file has
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its own language and we should keep track of that regardless of the
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language when symbols are read. If we want some manual setting for
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the language of symbol files (e.g. detecting when ".c" files are
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C++), it should be a seprate setting from the current_language. */
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extern const struct language_defn *current_language;
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/* Pointer to the language_defn expected by the user, e.g. the language
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of main(), or the language we last mentioned in a message, or C. */
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extern const struct language_defn *expected_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 != type_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 != range_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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current_language->la_language == language_cplus)
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extern void
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language_info PARAMS ((int));
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extern enum language
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set_language PARAMS ((enum 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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#define create_fundamental_type(objfile,typeid) \
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(current_language->la_fund_type(objfile, typeid))
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#define LA_PRINT_TYPE(type,varstring,stream,show,level) \
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(current_language->la_print_type(type,varstring,stream,show,level))
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#define LA_VAL_PRINT(type,valaddr,offset,addr,stream,fmt,deref,recurse,pretty) \
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(current_language->la_val_print(type,valaddr,offset,addr,stream,fmt,deref, \
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recurse,pretty))
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#define LA_VALUE_PRINT(val,stream,fmt,pretty) \
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(current_language->la_value_print(val,stream,fmt,pretty))
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/* Return a format string for printf that will print a number in one of
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the local (language-specific) formats. Result is static and is
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overwritten by the next call. Takes printf options like "08" or "l"
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(to produce e.g. %08x or %lx). */
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#define local_binary_format() \
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(current_language->la_binary_format.la_format)
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#define local_binary_format_prefix() \
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(current_language->la_binary_format.la_format_prefix)
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#define local_binary_format_specifier() \
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(current_language->la_binary_format.la_format_specifier)
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#define local_binary_format_suffix() \
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(current_language->la_binary_format.la_format_suffix)
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#define local_octal_format() \
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(current_language->la_octal_format.la_format)
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#define local_octal_format_prefix() \
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(current_language->la_octal_format.la_format_prefix)
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#define local_octal_format_specifier() \
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(current_language->la_octal_format.la_format_specifier)
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#define local_octal_format_suffix() \
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(current_language->la_octal_format.la_format_suffix)
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#define local_decimal_format() \
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(current_language->la_decimal_format.la_format)
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#define local_decimal_format_prefix() \
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(current_language->la_decimal_format.la_format_prefix)
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#define local_decimal_format_specifier() \
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(current_language->la_decimal_format.la_format_specifier)
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#define local_decimal_format_suffix() \
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(current_language->la_decimal_format.la_format_suffix)
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#define local_hex_format() \
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(current_language->la_hex_format.la_format)
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#define local_hex_format_prefix() \
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(current_language->la_hex_format.la_format_prefix)
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#define local_hex_format_specifier() \
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(current_language->la_hex_format.la_format_specifier)
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#define local_hex_format_suffix() \
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(current_language->la_hex_format.la_format_suffix)
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#define LA_PRINT_CHAR(ch, stream) \
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(current_language->la_printchar(ch, stream))
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#define LA_PRINT_STRING(stream, string, length, width, force_ellipses) \
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(current_language->la_printstr(stream, string, length, width, force_ellipses))
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#define LA_EMIT_CHAR(ch, stream, quoter) \
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(current_language->la_emitchar(ch, stream, quoter))
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/* Test a character to decide whether it can be printed in literal form
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or needs to be printed in another representation. For example,
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in C the literal form of the character with octal value 141 is 'a'
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and the "other representation" is '\141'. The "other representation"
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is program language dependent. */
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#define PRINT_LITERAL_FORM(c) \
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((c) >= 0x20 \
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&& ((c) < 0x7F || (c) >= 0xA0) \
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&& (!sevenbit_strings || (c) < 0x80))
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/* Return a format string for printf that will print a number in one of
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the local (language-specific) formats. Result is static and is
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overwritten by the next call. Takes printf options like "08" or "l"
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(to produce e.g. %08x or %lx). */
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extern char *
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local_decimal_format_custom PARAMS ((char *)); /* language.c */
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extern char *
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local_octal_format_custom PARAMS ((char *)); /* language.c */
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extern char *
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local_hex_format_custom PARAMS ((char *)); /* language.c */
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/* Return a string that contains a number formatted in one of the local
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(language-specific) formats. Result is static and is overwritten by
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the next call. Takes printf options like "08" or "l". */
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extern char *
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local_hex_string PARAMS ((unsigned long)); /* language.c */
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extern char *
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local_hex_string_custom PARAMS ((unsigned long, char *)); /* language.c */
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/* Type predicates */
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extern int
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simple_type PARAMS ((struct type *));
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extern int
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ordered_type PARAMS ((struct type *));
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extern int
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same_type PARAMS ((struct type *, struct type *));
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extern int
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integral_type PARAMS ((struct type *));
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extern int
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numeric_type PARAMS ((struct type *));
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extern int
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character_type PARAMS ((struct type *));
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extern int
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boolean_type PARAMS ((struct type *));
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extern int
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float_type PARAMS ((struct type *));
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extern int
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pointer_type PARAMS ((struct type *));
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extern int
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structured_type PARAMS ((struct type *));
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/* Checks Binary and Unary operations for semantic type correctness */
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/* FIXME: Does not appear to be used */
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#define unop_type_check(v,o) binop_type_check((v),NULL,(o))
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extern void
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binop_type_check PARAMS ((struct value *, struct value *, int));
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/* Error messages */
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extern void
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op_error PARAMS ((char *fmt, enum exp_opcode, int));
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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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extern void
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type_error PARAMS ((char *, ...))
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ATTR_FORMAT(printf, 1, 2);
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void
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range_error PARAMS ((char *, ...))
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ATTR_FORMAT(printf, 1, 2);
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/* Data: Does this value represent "truth" to the current language? */
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extern int
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value_true PARAMS ((struct value *));
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extern struct type * lang_bool_type PARAMS ((void));
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/* The type used for Boolean values in the current language. */
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#define LA_BOOL_TYPE lang_bool_type ()
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/* Misc: The string representing a particular enum language. */
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extern enum language language_enum PARAMS ((char *str));
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extern const struct language_defn *language_def PARAMS ((enum language));
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extern char *language_str PARAMS ((enum language));
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/* Add a language to the set known by GDB (at initialization time). */
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extern void
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add_language PARAMS ((const struct language_defn *));
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extern enum language
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get_frame_language PARAMS ((void)); /* In stack.c */
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#endif /* defined (LANGUAGE_H) */
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