/* Evaluate expressions for GDB.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005 Free
Software Foundation, Inc.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "gdb_string.h"
#include "objc-lang.h"
#include "block.h"
#include "parser-defs.h"
+#include "cp-support.h"
/* This is defined in valops.c */
extern int overload_resolution;
struct value *val = NULL;
int nlabels = 0;
int bitpos, bitsize;
- char *addr;
+ bfd_byte *addr;
/* Skip past the labels, and count them. */
while (get_label (exp, pos) != NULL)
fieldno++)
{
char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
- if (field_name != NULL && DEPRECATED_STREQ (field_name, label))
+ if (field_name != NULL && strcmp (field_name, label) == 0)
{
variantno = -1;
subfieldno = fieldno;
subfieldno < TYPE_NFIELDS (substruct_type);
subfieldno++)
{
- if (DEPRECATED_STREQ (TYPE_FIELD_NAME (substruct_type,
+ if (strcmp(TYPE_FIELD_NAME (substruct_type,
subfieldno),
- label))
+ label) == 0)
{
goto found;
}
}
}
}
- error ("there is no field named %s", label);
+ error (_("there is no field named %s"), label);
found:
;
}
if (variantno < 0)
{
fieldno++;
+ /* Skip static fields. */
+ while (fieldno < TYPE_NFIELDS (struct_type)
+ && TYPE_FIELD_STATIC_KIND (struct_type, fieldno))
+ fieldno++;
subfieldno = fieldno;
if (fieldno >= TYPE_NFIELDS (struct_type))
- error ("too many initializers");
+ error (_("too many initializers"));
field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
if (TYPE_CODE (field_type) == TYPE_CODE_UNION
&& TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
- error ("don't know which variant you want to set");
+ error (_("don't know which variant you want to set"));
}
}
bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
if (variantno >= 0)
bitpos += TYPE_FIELD_BITPOS (substruct_type, subfieldno);
- addr = VALUE_CONTENTS (struct_val) + bitpos / 8;
+ addr = value_contents_writeable (struct_val) + bitpos / 8;
if (bitsize)
modify_field (addr, value_as_long (val),
bitpos % 8, bitsize);
else
- memcpy (addr, VALUE_CONTENTS (val),
+ memcpy (addr, value_contents (val),
TYPE_LENGTH (value_type (val)));
}
while (--nlabels > 0);
low = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
high = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
if (low < low_bound || high > high_bound)
- error ("tuple range index out of range");
+ error (_("tuple range index out of range"));
for (index = low; index <= high; index++)
{
memcpy (value_contents_raw (array)
+ (index - low_bound) * element_size,
- VALUE_CONTENTS (element), element_size);
+ value_contents (element), element_size);
}
}
else
{
index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
if (index < low_bound || index > high_bound)
- error ("tuple index out of range");
+ error (_("tuple index out of range"));
memcpy (value_contents_raw (array) + (index - low_bound) * element_size,
- VALUE_CONTENTS (element), element_size);
+ value_contents (element), element_size);
}
return index;
}
+struct value *
+value_f90_subarray (struct value *array,
+ struct expression *exp, int *pos, enum noside noside)
+{
+ int pc = (*pos) + 1;
+ LONGEST low_bound, high_bound;
+ struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
+ enum f90_range_type range_type = longest_to_int (exp->elts[pc].longconst);
+
+ *pos += 3;
+
+ if (range_type == LOW_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
+ low_bound = TYPE_LOW_BOUND (range);
+ else
+ low_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
+
+ if (range_type == HIGH_BOUND_DEFAULT || range_type == BOTH_BOUND_DEFAULT)
+ high_bound = TYPE_HIGH_BOUND (range);
+ else
+ high_bound = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
+
+ return value_slice (array, low_bound, high_bound - low_bound + 1);
+}
+
struct value *
evaluate_subexp_standard (struct type *expect_type,
struct expression *exp, int *pos,
&exp->elts[pc + 3].string,
noside);
if (arg1 == NULL)
- error ("There is no field named %s", &exp->elts[pc + 3].string);
+ error (_("There is no field named %s"), &exp->elts[pc + 3].string);
return arg1;
case OP_LONG:
struct value *val = value_of_register (regno, get_selected_frame (NULL));
(*pos) += 2;
if (val == NULL)
- error ("Value of register %s not available.",
+ error (_("Value of register %s not available."),
frame_map_regnum_to_name (get_selected_frame (NULL), regno));
else
return val;
{
if (index > high_bound)
/* to avoid memory corruption */
- error ("Too many array elements");
+ error (_("Too many array elements"));
memcpy (value_contents_raw (array)
+ (index - low_bound) * element_size,
- VALUE_CONTENTS (element),
+ value_contents (element),
element_size);
}
index++;
&& TYPE_CODE (type) == TYPE_CODE_SET)
{
struct value *set = allocate_value (expect_type);
- char *valaddr = value_contents_raw (set);
+ gdb_byte *valaddr = value_contents_raw (set);
struct type *element_type = TYPE_INDEX_TYPE (type);
struct type *check_type = element_type;
LONGEST low_bound, high_bound;
check_type = TYPE_TARGET_TYPE (check_type);
if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
- error ("(power)set type with unknown size");
+ error (_("(power)set type with unknown size"));
memset (valaddr, '\0', TYPE_LENGTH (type));
for (tem = 0; tem < nargs; tem++)
{
(TYPE_CODE (range_low_type) == TYPE_CODE_ENUM &&
(range_low_type != range_high_type)))
/* different element modes */
- error ("POWERSET tuple elements of different mode");
+ error (_("POWERSET tuple elements of different mode"));
if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type)) ||
(TYPE_CODE (check_type) == TYPE_CODE_ENUM &&
range_low_type != check_type))
- error ("incompatible POWERSET tuple elements");
+ error (_("incompatible POWERSET tuple elements"));
if (range_low > range_high)
{
- warning ("empty POWERSET tuple range");
+ warning (_("empty POWERSET tuple range"));
continue;
}
if (range_low < low_bound || range_high > high_bound)
- error ("POWERSET tuple element out of range");
+ error (_("POWERSET tuple element out of range"));
range_low -= low_bound;
range_high -= low_bound;
for (; range_low <= range_high; range_low++)
responds_selector = lookup_child_selector ("respondsTo:");
if (responds_selector == 0)
- error ("no 'respondsTo:' or 'respondsToSelector:' method");
+ error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
method_selector = lookup_child_selector ("methodForSelector:");
if (method_selector == 0)
method_selector = lookup_child_selector ("methodFor:");
if (method_selector == 0)
- error ("no 'methodFor:' or 'methodForSelector:' method");
+ error (_("no 'methodFor:' or 'methodForSelector:' method"));
/* Call the verification method, to make sure that the target
class implements the desired method. */
ret = call_function_by_hand (argvec[0], 3, argvec + 1);
}
if (value_as_long (ret) == 0)
- error ("Target does not respond to this message selector.");
+ error (_("Target does not respond to this message selector."));
/* Call "methodForSelector:" method, to get the address of a
function method that implements this selector for this
if (method)
{
if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
- error ("method address has symbol information with non-function type; skipping");
+ error (_("method address has symbol information with non-function type; skipping"));
if (struct_return)
VALUE_ADDRESS (method) = value_as_address (msg_send_stret);
else
return allocate_value (type);
}
else
- error ("Expression of type other than \"method returning ...\" used as a method");
+ error (_("Expression of type other than \"method returning ...\" used as a method"));
}
/* Now depending on whether we found a symbol for the method,
if (gnu_runtime && (method != NULL))
{
/* Function objc_msg_lookup returns a pointer. */
- argvec[0]->type
- = lookup_function_type (lookup_pointer_type (value_type (argvec[0])));
+ deprecated_set_value_type (argvec[0],
+ lookup_function_type (lookup_pointer_type (value_type (argvec[0]))));
argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
}
to the function, but possibly to some thunk. */
if (deprecated_hp_som_som_object_present)
{
- error ("Not implemented: function invocation through pointer to method with HP aCC");
+ error (_("Not implemented: function invocation through pointer to method with HP aCC"));
}
nargs++;
}
}
if (i < 0)
- error ("virtual function at index %d not found", fnoffset);
+ error (_("virtual function at index %d not found"), fnoffset);
}
else
{
- arg1->type = lookup_pointer_type (TYPE_TARGET_TYPE (value_type (arg1)));
+ deprecated_set_value_type (arg1, lookup_pointer_type (TYPE_TARGET_TYPE (value_type (arg1))));
}
got_it:
reflect any ``this'' changes. */
arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
VALUE_ADDRESS (temp) + value_offset (temp)
- + VALUE_EMBEDDED_OFFSET (temp));
+ + value_embedded_offset (temp));
argvec[1] = arg2; /* the ``this'' pointer */
}
if (noside == EVAL_SKIP)
goto nosideret;
if (argvec[0] == NULL)
- error ("Cannot evaluate function -- may be inlined");
+ error (_("Cannot evaluate function -- may be inlined"));
if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
/* If the return type doesn't look like a function type, call an
if (ftype)
return allocate_value (TYPE_TARGET_TYPE (value_type (argvec[0])));
else
- error ("Expression of type other than \"Function returning ...\" used as function");
+ error (_("Expression of type other than \"Function returning ...\" used as function"));
}
return call_function_by_hand (argvec[0], nargs, argvec + 1);
/* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
type = check_typedef (value_type (arg1));
code = TYPE_CODE (type);
+ if (code == TYPE_CODE_PTR)
+ {
+ /* Fortran always passes variable to subroutines as pointer.
+ So we need to look into its target type to see if it is
+ array, string or function. If it is, we need to switch
+ to the target value the original one points to. */
+ struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
+
+ if (TYPE_CODE (target_type) == TYPE_CODE_ARRAY
+ || TYPE_CODE (target_type) == TYPE_CODE_STRING
+ || TYPE_CODE (target_type) == TYPE_CODE_FUNC)
+ {
+ arg1 = value_ind (arg1);
+ type = check_typedef (value_type (arg1));
+ code = TYPE_CODE (type);
+ }
+ }
+
switch (code)
{
case TYPE_CODE_ARRAY:
- goto multi_f77_subscript;
+ if (exp->elts[*pos].opcode == OP_F90_RANGE)
+ return value_f90_subarray (arg1, exp, pos, noside);
+ else
+ goto multi_f77_subscript;
case TYPE_CODE_STRING:
- goto op_f77_substr;
+ if (exp->elts[*pos].opcode == OP_F90_RANGE)
+ return value_f90_subarray (arg1, exp, pos, noside);
+ else
+ {
+ arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
+ return value_subscript (arg1, arg2);
+ }
case TYPE_CODE_PTR:
case TYPE_CODE_FUNC:
goto do_call_it;
default:
- error ("Cannot perform substring on this type");
+ error (_("Cannot perform substring on this type"));
}
- op_f77_substr:
- /* We have a substring operation on our hands here,
- let us get the string we will be dealing with */
-
- /* Now evaluate the 'from' and 'to' */
-
- arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
-
- if (nargs < 2)
- return value_subscript (arg1, arg2);
-
- arg3 = evaluate_subexp_with_coercion (exp, pos, noside);
-
- if (noside == EVAL_SKIP)
- goto nosideret;
-
- tem2 = value_as_long (arg2);
- tem3 = value_as_long (arg3);
-
- return value_slice (arg1, tem2, tem3 - tem2 + 1);
-
case OP_COMPLEX:
/* We have a complex number, There should be 2 floating
point numbers that compose it */
if (deprecated_hp_som_som_object_present &&
(TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR) &&
(TYPE_CODE (TYPE_TARGET_TYPE (value_type (arg2))) == TYPE_CODE_METHOD))
- error ("Pointers to methods not supported with HP aCC"); /* 1997-08-19 */
+ error (_("Pointers to methods not supported with HP aCC")); /* 1997-08-19 */
mem_offset = value_as_long (arg2);
goto handle_pointer_to_member;
if (deprecated_hp_som_som_object_present &&
(TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR) &&
(TYPE_CODE (TYPE_TARGET_TYPE (value_type (arg2))) == TYPE_CODE_METHOD))
- error ("Pointers to methods not supported with HP aCC"); /* 1997-08-19 */
+ error (_("Pointers to methods not supported with HP aCC")); /* 1997-08-19 */
mem_offset = value_as_long (arg2);
if (deprecated_hp_som_som_object_present)
{
if (!mem_offset) /* no bias -> really null */
- error ("Attempted dereference of null pointer-to-member");
+ error (_("Attempted dereference of null pointer-to-member"));
mem_offset &= ~0x20000000;
}
if (noside == EVAL_SKIP)
goto bad_pointer_to_member;
type = check_typedef (TYPE_TARGET_TYPE (type));
if (TYPE_CODE (type) == TYPE_CODE_METHOD)
- error ("not implemented: pointer-to-method in pointer-to-member construct");
+ error (_("not implemented: pointer-to-method in pointer-to-member construct"));
if (TYPE_CODE (type) != TYPE_CODE_MEMBER)
goto bad_pointer_to_member;
/* Now, convert these values to an address. */
value_as_long (arg1) + mem_offset);
return value_ind (arg3);
bad_pointer_to_member:
- error ("non-pointer-to-member value used in pointer-to-member construct");
+ error (_("non-pointer-to-member value used in pointer-to-member construct"));
case BINOP_CONCAT:
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
of the function as it would be in a naive implementation. */
if ((TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR) &&
(TYPE_CODE (TYPE_TARGET_TYPE (value_type (arg1))) == TYPE_CODE_METHOD))
- error ("Assignment to pointers to methods not implemented with HP aCC");
+ error (_("Assignment to pointers to methods not implemented with HP aCC"));
/* HP aCC pointers to data members require a constant bias */
if ((TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR) &&
(TYPE_CODE (TYPE_TARGET_TYPE (value_type (arg1))) == TYPE_CODE_MEMBER))
{
- unsigned int *ptr = (unsigned int *) VALUE_CONTENTS (arg2); /* forces evaluation */
+ unsigned int *ptr = (unsigned int *) value_contents (arg2); /* forces evaluation */
*ptr |= 0x20000000; /* set 29th bit */
}
}
else
return value_sub (arg1, arg2);
+ case BINOP_EXP:
case BINOP_MUL:
case BINOP_DIV:
case BINOP_REM:
arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
goto nosideret;
- error ("':' operator used in invalid context");
+ error (_("':' operator used in invalid context"));
case BINOP_SUBSCRIPT:
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
&& TYPE_CODE (type) != TYPE_CODE_PTR)
{
if (TYPE_NAME (type))
- error ("cannot subscript something of type `%s'",
+ error (_("cannot subscript something of type `%s'"),
TYPE_NAME (type));
else
- error ("cannot subscript requested type");
+ error (_("cannot subscript requested type"));
}
if (noside == EVAL_AVOID_SIDE_EFFECTS)
}
else
{
- error ("cannot subscript something of type `%s'",
+ error (_("cannot subscript something of type `%s'"),
TYPE_NAME (value_type (arg1)));
}
}
int offset_item; /* The array offset where the item lives */
if (nargs > MAX_FORTRAN_DIMS)
- error ("Too many subscripts for F77 (%d Max)", MAX_FORTRAN_DIMS);
+ error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
tmp_type = check_typedef (value_type (arg1));
ndimensions = calc_f77_array_dims (type);
if (nargs != ndimensions)
- error ("Wrong number of subscripts");
+ error (_("Wrong number of subscripts"));
/* Now that we know we have a legal array subscript expression
let us actually find out where this element exists in the array. */
{
retcode = f77_get_dynamic_upperbound (tmp_type, &upper);
if (retcode == BOUND_FETCH_ERROR)
- error ("Cannot obtain dynamic upper bound");
+ error (_("Cannot obtain dynamic upper bound"));
retcode = f77_get_dynamic_lowerbound (tmp_type, &lower);
if (retcode == BOUND_FETCH_ERROR)
- error ("Cannot obtain dynamic lower bound");
+ error (_("Cannot obtain dynamic lower bound"));
array_size_array[nargs - i - 1] = upper - lower + 1;
type, this will ensure that value_subscript()
returns the correct type value */
- arg1->type = tmp_type;
+ deprecated_set_value_type (arg1, tmp_type);
return value_ind (value_add (value_coerce_array (arg1), arg2));
}
goto nosideret;
type = check_typedef (value_type (arg2));
if (TYPE_CODE (type) != TYPE_CODE_INT)
- error ("Non-integral right operand for \"@\" operator.");
+ error (_("Non-integral right operand for \"@\" operator."));
if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
return allocate_repeat_value (value_type (arg1),
evaluate_subexp (NULL_TYPE, exp, pos, noside);
return evaluate_subexp (NULL_TYPE, exp, pos, noside);
+ case UNOP_PLUS:
+ arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
+ if (noside == EVAL_SKIP)
+ goto nosideret;
+ if (unop_user_defined_p (op, arg1))
+ return value_x_unop (arg1, op, noside);
+ else
+ return value_pos (arg1);
+
case UNOP_NEG:
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
if ((TYPE_TARGET_TYPE (value_type (arg1))) &&
((TYPE_CODE (TYPE_TARGET_TYPE (value_type (arg1))) == TYPE_CODE_METHOD) ||
(TYPE_CODE (TYPE_TARGET_TYPE (value_type (arg1))) == TYPE_CODE_MEMBER)))
- error ("Attempt to dereference pointer to member without an object");
+ error (_("Attempt to dereference pointer to member without an object"));
if (noside == EVAL_SKIP)
goto nosideret;
if (unop_user_defined_p (op, arg1))
/* GDB allows dereferencing an int. */
return value_zero (builtin_type_int, lval_memory);
else
- error ("Attempt to take contents of a non-pointer value.");
+ error (_("Attempt to take contents of a non-pointer value."));
}
return value_ind (arg1);
(TYPE_CODE (value_type (retvalp)) == TYPE_CODE_PTR) &&
(TYPE_CODE (TYPE_TARGET_TYPE (value_type (retvalp))) == TYPE_CODE_MEMBER))
{
- unsigned int *ptr = (unsigned int *) VALUE_CONTENTS (retvalp); /* forces evaluation */
+ unsigned int *ptr = (unsigned int *) value_contents (retvalp); /* forces evaluation */
*ptr |= 0x20000000; /* set 29th bit */
}
return retvalp;
return value_of_local ("self", 1);
case OP_TYPE:
- error ("Attempt to use a type name as an expression");
+ /* The value is not supposed to be used. This is here to make it
+ easier to accommodate expressions that contain types. */
+ (*pos) += 2;
+ if (noside == EVAL_SKIP)
+ goto nosideret;
+ else if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ return allocate_value (exp->elts[pc + 1].type);
+ else
+ error (_("Attempt to use a type name as an expression"));
default:
/* Removing this case and compiling with gcc -Wall reveals that
then they should be separate cases, with more descriptive
error messages. */
- error ("\
-GDB does not (yet) know how to evaluate that kind of expression");
+ error (_("\
+GDB does not (yet) know how to evaluate that kind of expression"));
}
nosideret:
enum exp_opcode op;
int pc;
struct symbol *var;
+ struct value *x;
pc = (*pos);
op = exp->elts[pc].opcode;
{
case UNOP_IND:
(*pos)++;
- return evaluate_subexp (NULL_TYPE, exp, pos, noside);
+ x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
+
+ /* We can't optimize out "&*" if there's a user-defined operator*. */
+ if (unop_user_defined_p (op, x))
+ {
+ x = value_x_unop (x, op, noside);
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ {
+ if (VALUE_LVAL (x) == lval_memory)
+ return value_zero (lookup_pointer_type (value_type (x)),
+ not_lval);
+ else
+ error (_("Attempt to take address of non-lval"));
+ }
+ return value_addr (x);
+ }
+
+ return x;
case UNOP_MEMVAL:
(*pos) += 3;
|| sym_class == LOC_CONST_BYTES
|| sym_class == LOC_REGISTER
|| sym_class == LOC_REGPARM)
- error ("Attempt to take address of register or constant.");
+ error (_("Attempt to take address of register or constant."));
return
value_zero (type, not_lval);
default:
default_case:
+ x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
- struct value *x = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (VALUE_LVAL (x) == lval_memory)
return value_zero (lookup_pointer_type (value_type (x)),
not_lval);
else
- error ("Attempt to take address of non-lval");
+ error (_("Attempt to take address of non-lval"));
}
- return value_addr (evaluate_subexp (NULL_TYPE, exp, pos, noside));
+ return value_addr (x);
}
}
if (TYPE_CODE (type) != TYPE_CODE_PTR
&& TYPE_CODE (type) != TYPE_CODE_REF
&& TYPE_CODE (type) != TYPE_CODE_ARRAY)
- error ("Attempt to take contents of a non-pointer value.");
+ error (_("Attempt to take contents of a non-pointer value."));
type = check_typedef (TYPE_TARGET_TYPE (type));
return value_from_longest (builtin_type_int, (LONGEST)
TYPE_LENGTH (type));
tmp[length + 3] = '\0';
expr = parse_expression (tmp);
if (expr->elts[0].opcode != UNOP_CAST)
- error ("Internal error in eval_type.");
+ error (_("Internal error in eval_type."));
return expr->elts[1].type;
}
struct type *tmp_type;
if ((TYPE_CODE (array_type) != TYPE_CODE_ARRAY))
- error ("Can't get dimensions for a non-array type");
+ error (_("Can't get dimensions for a non-array type"));
tmp_type = array_type;
projects / binutils.git / blobdiff