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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:35:26 +0000
commitc906108c21474dfb4ed285bcc0ac6fe02cd400cc (patch)
treea0015aa5cedc19ccbab307251353a41722a3ae13 /gdb/language.h
parentcd946cff9ede3f30935803403f06f6ed30cad136 (diff)
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Initial creation of sourceware repositorygdb-4_18-branchpoint
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#if !defined (LANGUAGE_H)
+#define LANGUAGE_H 1
+
+#ifdef __STDC__ /* Forward decls for prototypes */
+struct value;
+struct objfile;
+struct expression;
+/* 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 *));
+
+ /* Evaluate an expression. */
+ struct value * (*evaluate_exp) PARAMS ((struct type *, struct expression *,
+ int *, enum noside));
+
+ void (*la_printchar) PARAMS ((int ch, GDB_FILE *stream));
+
+ void (*la_printstr) PARAMS ((GDB_FILE *stream, char *string,
+ unsigned int length, int width,
+ int force_ellipses));
+
+ void (*la_emitchar) PARAMS ((int ch, GDB_FILE *stream, int quoter));
+
+ 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 *, int, 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 enum language
+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,offset,addr,stream,fmt,deref,recurse,pretty) \
+ (current_language->la_val_print(type,valaddr,offset,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, width, force_ellipses) \
+ (current_language->la_printstr(stream, string, length, width, force_ellipses))
+#define LA_EMIT_CHAR(ch, stream, quoter) \
+ (current_language->la_emitchar(ch, stream, quoter))
+
+/* 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 PARAMS ((char *, ...))
+ ATTR_FORMAT(printf, 1, 2);
+
+void
+range_error PARAMS ((char *, ...))
+ ATTR_FORMAT(printf, 1, 2);
+
+/* Data: Does this value represent "truth" to the current language? */
+
+extern int
+value_true PARAMS ((struct value *));
+
+extern struct type * lang_bool_type PARAMS ((void));
+
+/* The type used for Boolean values in the current language. */
+#define LA_BOOL_TYPE lang_bool_type ()
+
+/* 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) */