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/* Support for printing C values for GDB, the GNU debugger.
Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994
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 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. */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "demangle.h"
#include "valprint.h"
#include "language.h"
/* BEGIN-FIXME */
extern int vtblprint; /* Controls printing of vtbl's */
extern void
cp_print_class_member PARAMS ((char *, struct type *, GDB_FILE *, char *));
extern void
cp_print_class_method PARAMS ((char *, struct type *, GDB_FILE *));
extern void
cp_print_value_fields PARAMS ((struct type *, char *, GDB_FILE *, int, int,
enum val_prettyprint, struct type **));
extern int
cp_is_vtbl_ptr_type PARAMS ((struct type *));
extern int
cp_is_vtbl_member PARAMS ((struct type *));
/* END-FIXME */
/* BEGIN-FIXME: Hooks into c-typeprint.c */
extern void
c_type_print_varspec_prefix PARAMS ((struct type *, GDB_FILE *, int, int));
extern void
cp_type_print_method_args PARAMS ((struct type **, char *, char *, int,
GDB_FILE *));
/* END-FIXME */
extern struct obstack dont_print_obstack;
/* Print data of type TYPE located at VALADDR (within GDB), which came from
the inferior at address ADDRESS, onto stdio stream STREAM according to
FORMAT (a letter or 0 for natural format). The data at VALADDR is in
target byte order.
If the data are a string pointer, returns the number of string characters
printed.
If DEREF_REF is nonzero, then dereference references, otherwise just print
them like pointers.
The PRETTY parameter controls prettyprinting. */
int
c_val_print (type, valaddr, address, stream, format, deref_ref, recurse,
pretty)
struct type *type;
char *valaddr;
CORE_ADDR address;
GDB_FILE *stream;
int format;
int deref_ref;
int recurse;
enum val_prettyprint pretty;
{
register unsigned int i = 0; /* Number of characters printed */
unsigned len;
struct type *elttype;
unsigned eltlen;
LONGEST val;
CORE_ADDR addr;
switch (TYPE_CODE (type))
{
case TYPE_CODE_ARRAY:
if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
{
elttype = TYPE_TARGET_TYPE (type);
eltlen = TYPE_LENGTH (elttype);
len = TYPE_LENGTH (type) / eltlen;
if (prettyprint_arrays)
{
print_spaces_filtered (2 + 2 * recurse, stream);
}
/* For an array of chars, print with string syntax. */
if (eltlen == 1 &&
((TYPE_CODE (elttype) == TYPE_CODE_INT)
|| ((current_language->la_language == language_m2)
&& (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
&& (format == 0 || format == 's'))
{
/* If requested, look for the first null char and only print
elements up to it. */
if (stop_print_at_null)
{
int temp_len;
/* Look for a NULL char. */
for (temp_len = 0;
valaddr[temp_len]
&& temp_len < len && temp_len < print_max;
temp_len++);
len = temp_len;
}
LA_PRINT_STRING (stream, valaddr, len, 0);
i = len;
}
else
{
fprintf_filtered (stream, "{");
/* If this is a virtual function table, print the 0th
entry specially, and the rest of the members normally. */
if (cp_is_vtbl_ptr_type (elttype))
{
i = 1;
fprintf_filtered (stream, "%d vtable entries", len - 1);
}
else
{
i = 0;
}
val_print_array_elements (type, valaddr, address, stream,
format, deref_ref, recurse, pretty, i);
fprintf_filtered (stream, "}");
}
break;
}
/* Array of unspecified length: treat like pointer to first elt. */
addr = address;
goto print_unpacked_pointer;
case TYPE_CODE_PTR:
if (format && format != 's')
{
print_scalar_formatted (valaddr, type, format, 0, stream);
break;
}
if (vtblprint && cp_is_vtbl_ptr_type(type))
{
/* Print the unmangled name if desired. */
/* Print vtable entry - we only get here if we ARE using
-fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
print_address_demangle(extract_address (valaddr, TYPE_LENGTH (type)),
stream, demangle);
break;
}
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
{
cp_print_class_method (valaddr, type, stream);
}
else if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER)
{
cp_print_class_member (valaddr,
TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)),
stream, "&");
}
else
{
addr = unpack_pointer (type, valaddr);
print_unpacked_pointer:
elttype = TYPE_TARGET_TYPE (type);
if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
{
/* Try to print what function it points to. */
print_address_demangle (addr, stream, demangle);
/* Return value is irrelevant except for string pointers. */
return (0);
}
if (addressprint && format != 's')
{
print_address_numeric (addr, 1, stream);
}
/* For a pointer to char or unsigned char, also print the string
pointed to, unless pointer is null. */
if (TYPE_LENGTH (elttype) == 1
&& TYPE_CODE (elttype) == TYPE_CODE_INT
&& (format == 0 || format == 's')
&& addr != 0)
{
i = val_print_string (addr, 0, stream);
}
else if (cp_is_vtbl_member(type))
{
/* print vtbl's nicely */
CORE_ADDR vt_address = unpack_pointer (type, valaddr);
struct minimal_symbol *msymbol =
lookup_minimal_symbol_by_pc (vt_address);
if ((msymbol != NULL) &&
(vt_address == SYMBOL_VALUE_ADDRESS (msymbol)))
{
fputs_filtered (" <", stream);
fputs_filtered (SYMBOL_SOURCE_NAME (msymbol), stream);
fputs_filtered (">", stream);
}
if (vt_address && vtblprint)
{
value_ptr vt_val;
struct symbol *wsym = (struct symbol *)NULL;
struct type *wtype;
struct symtab *s;
struct block *block = (struct block *)NULL;
int is_this_fld;
if (msymbol != NULL)
wsym = lookup_symbol (SYMBOL_NAME(msymbol), block,
VAR_NAMESPACE, &is_this_fld, &s);
if (wsym)
{
wtype = SYMBOL_TYPE(wsym);
}
else
{
wtype = TYPE_TARGET_TYPE(type);
}
vt_val = value_at (wtype, vt_address);
val_print (VALUE_TYPE (vt_val), VALUE_CONTENTS (vt_val),
VALUE_ADDRESS (vt_val), stream, format,
deref_ref, recurse + 1, pretty);
if (pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 + 2 * recurse, stream);
}
}
}
/* Return number of characters printed, including the terminating
'\0' if we reached the end. val_print_string takes care including
the terminating '\0' if necessary. */
return i;
}
break;
case TYPE_CODE_MEMBER:
error ("not implemented: member type in c_val_print");
break;
case TYPE_CODE_REF:
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER)
{
cp_print_class_member (valaddr,
TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)),
stream, "");
break;
}
if (addressprint)
{
fprintf_filtered (stream, "@");
print_address_numeric
(extract_address (valaddr,
TARGET_PTR_BIT / HOST_CHAR_BIT), 1, stream);
if (deref_ref)
fputs_filtered (": ", stream);
}
/* De-reference the reference. */
if (deref_ref)
{
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_UNDEF)
{
value_ptr deref_val =
value_at
(TYPE_TARGET_TYPE (type),
unpack_pointer (lookup_pointer_type (builtin_type_void),
valaddr));
val_print (VALUE_TYPE (deref_val),
VALUE_CONTENTS (deref_val),
VALUE_ADDRESS (deref_val), stream, format,
deref_ref, recurse + 1, pretty);
}
else
fputs_filtered ("???", stream);
}
break;
case TYPE_CODE_UNION:
if (recurse && !unionprint)
{
fprintf_filtered (stream, "{...}");
break;
}
/* Fall through. */
case TYPE_CODE_STRUCT:
if (vtblprint && cp_is_vtbl_ptr_type(type))
{
/* Print the unmangled name if desired. */
/* Print vtable entry - we only get here if NOT using
-fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */
print_address_demangle(*((int *) (valaddr + /* FIXME bytesex */
TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8)),
stream, demangle);
break;
}
cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
0);
break;
case TYPE_CODE_ENUM:
if (format)
{
print_scalar_formatted (valaddr, type, format, 0, stream);
break;
}
len = TYPE_NFIELDS (type);
val = unpack_long (type, valaddr);
for (i = 0; i < len; i++)
{
QUIT;
if (val == TYPE_FIELD_BITPOS (type, i))
{
break;
}
}
if (i < len)
{
fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
}
else
{
print_longest (stream, 'd', 0, val);
}
break;
case TYPE_CODE_FUNC:
if (format)
{
print_scalar_formatted (valaddr, type, format, 0, stream);
break;
}
/* FIXME, we should consider, at least for ANSI C language, eliminating
the distinction made between FUNCs and POINTERs to FUNCs. */
fprintf_filtered (stream, "{");
type_print (type, "", stream, -1);
fprintf_filtered (stream, "} ");
/* Try to print what function it points to, and its address. */
print_address_demangle (address, stream, demangle);
break;
case TYPE_CODE_BOOL:
/* Do something at least vaguely reasonable, for example if the
language is set wrong. */
case TYPE_CODE_RANGE:
/* FIXME: create_range_type does not set the unsigned bit in a
range type (I think it probably should copy it from the target
type), so we won't print values which are too large to
fit in a signed integer correctly. */
/* FIXME: Doesn't handle ranges of enums correctly. (Can't just
print with the target type, though, because the size of our type
and the target type might differ). */
/* FALLTHROUGH */
case TYPE_CODE_INT:
format = format ? format : output_format;
if (format)
{
print_scalar_formatted (valaddr, type, format, 0, stream);
}
else
{
val_print_type_code_int (type, valaddr, stream);
/* C and C++ has no single byte int type, char is used instead.
Since we don't know whether the value is really intended to
be used as an integer or a character, print the character
equivalent as well. */
if (TYPE_LENGTH (type) == 1)
{
fputs_filtered (" ", stream);
LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
stream);
}
}
break;
case TYPE_CODE_CHAR:
format = format ? format : output_format;
if (format)
{
print_scalar_formatted (valaddr, type, format, 0, stream);
}
else
{
fprintf_filtered (stream, TYPE_UNSIGNED (type) ? "%u" : "%d",
unpack_long (type, valaddr));
fputs_filtered (" ", stream);
LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr), stream);
}
break;
case TYPE_CODE_FLT:
if (format)
{
print_scalar_formatted (valaddr, type, format, 0, stream);
}
else
{
print_floating (valaddr, type, stream);
}
break;
case TYPE_CODE_VOID:
fprintf_filtered (stream, "void");
break;
case TYPE_CODE_ERROR:
fprintf_filtered (stream, "<error type>");
break;
case TYPE_CODE_UNDEF:
/* This happens (without TYPE_FLAG_STUB set) on systems which don't use
dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
and no complete type for struct foo in that file. */
fprintf_filtered (stream, "<incomplete type>");
break;
default:
error ("Invalid C/C++ type code %d in symbol table.", TYPE_CODE (type));
}
gdb_flush (stream);
return (0);
}
int
c_value_print (val, stream, format, pretty)
value_ptr val;
GDB_FILE *stream;
int format;
enum val_prettyprint pretty;
{
/* A "repeated" value really contains several values in a row.
They are made by the @ operator.
Print such values as if they were arrays. */
if (VALUE_REPEATED (val))
{
register unsigned int n = VALUE_REPETITIONS (val);
register unsigned int typelen = TYPE_LENGTH (VALUE_TYPE (val));
fprintf_filtered (stream, "{");
/* Print arrays of characters using string syntax. */
if (typelen == 1 && TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT
&& format == 0)
LA_PRINT_STRING (stream, VALUE_CONTENTS (val), n, 0);
else
{
value_print_array_elements (val, stream, format, pretty);
}
fprintf_filtered (stream, "}");
return (n * typelen);
}
else
{
struct type *type = VALUE_TYPE (val);
/* If it is a pointer, indicate what it points to.
Print type also if it is a reference.
C++: if it is a member pointer, we will take care
of that when we print it. */
if (TYPE_CODE (type) == TYPE_CODE_PTR ||
TYPE_CODE (type) == TYPE_CODE_REF)
{
/* Hack: remove (char *) for char strings. Their
type is indicated by the quoted string anyway. */
if (TYPE_CODE (type) == TYPE_CODE_PTR &&
TYPE_LENGTH (TYPE_TARGET_TYPE (type)) == sizeof(char) &&
TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_INT &&
!TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)))
{
/* Print nothing */
}
else
{
fprintf_filtered (stream, "(");
type_print (type, "", stream, -1);
fprintf_filtered (stream, ") ");
}
}
return (val_print (type, VALUE_CONTENTS (val),
VALUE_ADDRESS (val), stream, format, 1, 0, pretty));
}
}
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