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Diffstat (limited to 'gdb/language.h')
| -rw-r--r-- | gdb/language.h | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/gdb/language.h b/gdb/language.h new file mode 100644 index 00000000000..e3368691491 --- /dev/null +++ b/gdb/language.h @@ -0,0 +1,439 @@ +/* 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) */ |