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/* Pascal language support definitions for GDB, the GNU debugger.
Copyright (C) 2000-2021 Free Software Foundation, Inc.
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 3 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, see <http://www.gnu.org/licenses/>. */
#ifndef P_LANG_H
#define P_LANG_H
/* This file is derived from c-lang.h */
struct value;
struct parser_state;
/* Determines if type TYPE is a pascal string type. Returns a positive
value if the type is a known pascal string type. This function is used
by p-valprint.c code to allow better string display. If it is a pascal
string type, then it also sets info needed to get the length and the
data of the string length_pos, length_size and string_pos are given in
bytes. char_size gives the element size in bytes. FIXME: if the
position or the size of these fields are not multiple of TARGET_CHAR_BIT
then the results are wrong but this does not happen for Free Pascal nor
for GPC. */
extern int pascal_is_string_type (struct type *type,int *length_pos,
int *length_size, int *string_pos,
struct type **char_type,
const char **arrayname);
/* Defined in p-lang.c */
extern const char *pascal_main_name (void);
/* These are in p-lang.c: */
extern int is_pascal_string_type (struct type *, int *, int *, int *,
struct type **, const char **);
extern int pascal_object_is_vtbl_ptr_type (struct type *);
extern int pascal_object_is_vtbl_member (struct type *);
/* Class representing the Pascal language. */
class pascal_language : public language_defn
{
public:
pascal_language ()
: language_defn (language_pascal)
{ /* Nothing. */ }
/* See language.h. */
const char *name () const override
{ return "pascal"; }
/* See language.h. */
const char *natural_name () const override
{ return "Pascal"; }
/* See language.h. */
const std::vector<const char *> &filename_extensions () const override
{
static const std::vector<const char *> extensions
= { ".pas", ".p", ".pp" };
return extensions;
}
/* See language.h. */
void language_arch_info (struct gdbarch *gdbarch,
struct language_arch_info *lai) const override;
/* See language.h. */
void print_type (struct type *type, const char *varstring,
struct ui_file *stream, int show, int level,
const struct type_print_options *flags) const override;
/* See language.h. */
void value_print (struct value *val, struct ui_file *stream,
const struct value_print_options *options) const override;
/* See language.h. */
void value_print_inner
(struct value *val, struct ui_file *stream, int recurse,
const struct value_print_options *options) const override;
/* See language.h. */
int parser (struct parser_state *ps) const override;
/* See language.h. */
void emitchar (int ch, struct type *chtype,
struct ui_file *stream, int quoter) const override
{
int in_quotes = 0;
print_one_char (ch, stream, &in_quotes);
if (in_quotes)
fputs_filtered ("'", stream);
}
/* See language.h. */
void printchar (int ch, struct type *chtype,
struct ui_file *stream) const override;
/* See language.h. */
void printstr (struct ui_file *stream, struct type *elttype,
const gdb_byte *string, unsigned int length,
const char *encoding, int force_ellipses,
const struct value_print_options *options) const override;
/* See language.h. */
void print_typedef (struct type *type, struct symbol *new_symbol,
struct ui_file *stream) const override;
/* See language.h. */
bool is_string_type_p (struct type *type) const override
{
return pascal_is_string_type(type, nullptr, nullptr, nullptr,
nullptr, nullptr) > 0;
}
/* See language.h. */
const char *name_of_this () const override
{ return "this"; }
/* See language.h. */
bool range_checking_on_by_default () const override
{ return true; }
private:
/* Print the character C on STREAM as part of the contents of a literal
string. IN_QUOTES is reset to 0 if a char is written with #4 notation. */
void print_one_char (int c, struct ui_file *stream, int *in_quotes) const;
/* Print the name of the type (or the ultimate pointer target,
function value or array element), or the description of a
structure or union.
SHOW positive means print details about the type (e.g. enum values),
and print structure elements passing SHOW - 1 for show. SHOW negative
means just print the type name or struct tag if there is one. If
there is no name, print something sensible but concise like "struct
{...}".
SHOW zero means just print the type name or struct tag if there is one.
If there is no name, print something sensible but not as concise like
"struct {int x; int y;}".
LEVEL is the number of spaces to indent by.
We increase it for some recursive calls. */
void type_print_base (struct type *type, struct ui_file *stream, int show,
int level,
const struct type_print_options *flags) const;
/* Print any array sizes, function arguments or close parentheses
needed after the variable name (to describe its type).
Args work like pascal_type_print_varspec_prefix. */
void type_print_varspec_suffix (struct type *type, struct ui_file *stream,
int show, int passed_a_ptr,
int demangled_args,
const struct type_print_options *flags) const;
/* Helper for pascal_language::type_print_varspec_suffix to print the
suffix of a function or method. */
void type_print_func_varspec_suffix
(struct type *type, struct ui_file *stream, int show,
int passed_a_ptr, int demangled_args,
const struct type_print_options *flags) const;
/* Print any asterisks or open-parentheses needed before the
variable name (to describe its type).
On outermost call, pass 0 for PASSED_A_PTR.
On outermost call, SHOW > 0 means should ignore
any typename for TYPE and show its details.
SHOW is always zero on recursive calls. */
void type_print_varspec_prefix
(struct type *type, struct ui_file *stream, int show,
int passed_a_ptr, const struct type_print_options *flags) const;
/* Print the function args from TYPE (a TYPE_CODE_FUNC) to STREAM taking
FLAGS into account where appropriate. */
void print_func_args (struct type *type, struct ui_file *stream,
const struct type_print_options *flags) const;
/* Print the Pascal method arguments for PHYSNAME and METHODNAME to the
file STREAM. */
void type_print_method_args (const char *physname, const char *methodname,
struct ui_file *stream) const;
/* If TYPE is a derived type, then print out derivation information.
Print only the actual base classes of this type, not the base classes
of the base classes. I.e. for the derivation hierarchy:
class A { int a; };
class B : public A {int b; };
class C : public B {int c; };
Print the type of class C as:
class C : public B {
int c;
}
Not as the following (like gdb used to), which is not legal C++ syntax
for derived types and may be confused with the multiple inheritance
form:
class C : public B : public A {
int c;
}
In general, gdb should try to print the types as closely as possible
to the form that they appear in the source code. */
void type_print_derivation_info (struct ui_file *stream,
struct type *type) const;
};
#endif /* P_LANG_H */
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