/* Perform arithmetic and other operations on values, for GDB.
+
Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
+ Foundation, Inc.
This file is part of GDB.
#include "gdb_string.h"
#include "doublest.h"
#include <math.h>
+#include "infcall.h"
/* Define whether or not the C operator '/' truncates towards zero for
differently signed operands (truncation direction is undefined in C). */
void _initialize_valarith (void);
\f
+/* Given a pointer, return the size of its target.
+ If the pointer type is void *, then return 1.
+ If the target type is incomplete, then error out.
+ This isn't a general purpose function, but just a
+ helper for value_sub & value_add.
+*/
+
+static LONGEST
+find_size_for_pointer_math (struct type *ptr_type)
+{
+ LONGEST sz = -1;
+ struct type *ptr_target;
+
+ ptr_target = check_typedef (TYPE_TARGET_TYPE (ptr_type));
+
+ sz = TYPE_LENGTH (ptr_target);
+ if (sz == 0)
+ {
+ if (TYPE_CODE (ptr_type) == TYPE_CODE_VOID)
+ sz = 1;
+ else
+ {
+ char *name;
+
+ name = TYPE_NAME (ptr_target);
+ if (name == NULL)
+ name = TYPE_TAG_NAME (ptr_target);
+ if (name == NULL)
+ error ("Cannot perform pointer math on incomplete types, "
+ "try casting to a known type, or void *.");
+ else
+ error ("Cannot perform pointer math on incomplete type \"%s\", "
+ "try casting to a known type, or void *.", name);
+ }
+ }
+ return sz;
+}
+
struct value *
value_add (struct value *arg1, struct value *arg2)
{
struct value *valint;
struct value *valptr;
- register int len;
+ LONGEST sz;
struct type *type1, *type2, *valptrtype;
- COERCE_NUMBER (arg1);
- COERCE_NUMBER (arg2);
+ COERCE_ARRAY (arg1);
+ COERCE_ARRAY (arg2);
type1 = check_typedef (VALUE_TYPE (arg1));
type2 = check_typedef (VALUE_TYPE (arg2));
if ((TYPE_CODE (type1) == TYPE_CODE_PTR
|| TYPE_CODE (type2) == TYPE_CODE_PTR)
&&
- (TYPE_CODE (type1) == TYPE_CODE_INT
- || TYPE_CODE (type2) == TYPE_CODE_INT))
+ (is_integral_type (type1) || is_integral_type (type2)))
/* Exactly one argument is a pointer, and one is an integer. */
{
struct value *retval;
valint = arg1;
valptrtype = type2;
}
- len = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (valptrtype)));
- if (len == 0)
- len = 1; /* For (void *) */
+
+ sz = find_size_for_pointer_math (valptrtype);
+
retval = value_from_pointer (valptrtype,
value_as_address (valptr)
- + (len * value_as_long (valint)));
+ + (sz * value_as_long (valint)));
VALUE_BFD_SECTION (retval) = VALUE_BFD_SECTION (valptr);
return retval;
}
value_sub (struct value *arg1, struct value *arg2)
{
struct type *type1, *type2;
- COERCE_NUMBER (arg1);
- COERCE_NUMBER (arg2);
+ COERCE_ARRAY (arg1);
+ COERCE_ARRAY (arg2);
type1 = check_typedef (VALUE_TYPE (arg1));
type2 = check_typedef (VALUE_TYPE (arg2));
if (TYPE_CODE (type1) == TYPE_CODE_PTR)
{
- if (TYPE_CODE (type2) == TYPE_CODE_INT)
+ if (is_integral_type (type2))
{
/* pointer - integer. */
- LONGEST sz = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)));
+ LONGEST sz = find_size_for_pointer_math (type1);
+
return value_from_pointer (type1,
(value_as_address (arg1)
- (sz * value_as_long (arg2))));
else
VALUE_LVAL (v) = VALUE_LVAL (array);
VALUE_ADDRESS (v) = VALUE_ADDRESS (array);
+ VALUE_REGNO (v) = VALUE_REGNO (array);
VALUE_OFFSET (v) = VALUE_OFFSET (array) + elt_offs;
return v;
}
COERCE_REF (arg1);
COERCE_REF (arg2);
- COERCE_ENUM (arg1);
- COERCE_ENUM (arg2);
type1 = check_typedef (VALUE_TYPE (arg1));
type2 = check_typedef (VALUE_TYPE (arg2));
- if ((TYPE_CODE (type1) != TYPE_CODE_FLT
- && TYPE_CODE (type1) != TYPE_CODE_CHAR
- && TYPE_CODE (type1) != TYPE_CODE_INT
- && TYPE_CODE (type1) != TYPE_CODE_BOOL
- && TYPE_CODE (type1) != TYPE_CODE_RANGE)
+ if ((TYPE_CODE (type1) != TYPE_CODE_FLT && !is_integral_type (type1))
||
- (TYPE_CODE (type2) != TYPE_CODE_FLT
- && TYPE_CODE (type2) != TYPE_CODE_CHAR
- && TYPE_CODE (type2) != TYPE_CODE_INT
- && TYPE_CODE (type2) != TYPE_CODE_BOOL
- && TYPE_CODE (type2) != TYPE_CODE_RANGE))
+ (TYPE_CODE (type2) != TYPE_CODE_FLT && !is_integral_type (type2)))
error ("Argument to arithmetic operation not a number or boolean.");
if (TYPE_CODE (type1) == TYPE_CODE_FLT
case BINOP_EXP:
v = pow (v1, v2);
if (errno)
- error ("Cannot perform exponentiation: %s", strerror (errno));
+ error ("Cannot perform exponentiation: %s", safe_strerror (errno));
break;
default:
/* Integral operations here. */
/* FIXME: Also mixed integral/booleans, with result an integer. */
/* FIXME: This implements ANSI C rules (also correct for C++).
- What about FORTRAN and chill? */
+ What about FORTRAN and (the deleted) chill ? */
{
unsigned int promoted_len1 = TYPE_LENGTH (type1);
unsigned int promoted_len2 = TYPE_LENGTH (type2);
case BINOP_EXP:
v = pow (v1, v2);
if (errno)
- error ("Cannot perform exponentiation: %s", strerror (errno));
+ error ("Cannot perform exponentiation: %s", safe_strerror (errno));
break;
case BINOP_REM:
case BINOP_MOD:
/* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
v1 mod 0 has a defined value, v1. */
- /* Chill specifies that v2 must be > 0, so check for that. */
- if (current_language->la_language == language_chill
- && value_as_long (arg2) <= 0)
- {
- error ("Second operand of MOD must be greater than zero.");
- }
if (v2 == 0)
{
v = v1;
case BINOP_EXP:
v = pow (v1, v2);
if (errno)
- error ("Cannot perform exponentiation: %s", strerror (errno));
+ error ("Cannot perform exponentiation: %s", safe_strerror (errno));
break;
case BINOP_REM:
case BINOP_MOD:
/* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
X mod 0 has a defined value, X. */
- /* Chill specifies that v2 must be > 0, so check for that. */
- if (current_language->la_language == language_chill
- && v2 <= 0)
- {
- error ("Second operand of MOD must be greater than zero.");
- }
if (v2 == 0)
{
v = v1;
int
value_logical_not (struct value *arg1)
{
- register int len;
- register char *p;
+ int len;
+ char *p;
struct type *type1;
COERCE_NUMBER (arg1);
int
value_equal (struct value *arg1, struct value *arg2)
{
- register int len;
- register char *p1, *p2;
+ int len;
+ char *p1, *p2;
struct type *type1, *type2;
enum type_code code1;
enum type_code code2;
+ int is_int1, is_int2;
- COERCE_NUMBER (arg1);
- COERCE_NUMBER (arg2);
+ COERCE_ARRAY (arg1);
+ COERCE_ARRAY (arg2);
type1 = check_typedef (VALUE_TYPE (arg1));
type2 = check_typedef (VALUE_TYPE (arg2));
code1 = TYPE_CODE (type1);
code2 = TYPE_CODE (type2);
+ is_int1 = is_integral_type (type1);
+ is_int2 = is_integral_type (type2);
- if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL) &&
- (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
+ if (is_int1 && is_int2)
return longest_to_int (value_as_long (value_binop (arg1, arg2,
BINOP_EQUAL)));
- else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL)
- && (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
+ else if ((code1 == TYPE_CODE_FLT || is_int1)
+ && (code2 == TYPE_CODE_FLT || is_int2))
return value_as_double (arg1) == value_as_double (arg2);
/* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
is bigger. */
- else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
+ else if (code1 == TYPE_CODE_PTR && is_int2)
return value_as_address (arg1) == (CORE_ADDR) value_as_long (arg2);
- else if (code2 == TYPE_CODE_PTR && (code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL))
+ else if (code2 == TYPE_CODE_PTR && is_int1)
return (CORE_ADDR) value_as_long (arg1) == value_as_address (arg2);
else if (code1 == code2
int
value_less (struct value *arg1, struct value *arg2)
{
- register enum type_code code1;
- register enum type_code code2;
+ enum type_code code1;
+ enum type_code code2;
struct type *type1, *type2;
+ int is_int1, is_int2;
- COERCE_NUMBER (arg1);
- COERCE_NUMBER (arg2);
+ COERCE_ARRAY (arg1);
+ COERCE_ARRAY (arg2);
type1 = check_typedef (VALUE_TYPE (arg1));
type2 = check_typedef (VALUE_TYPE (arg2));
code1 = TYPE_CODE (type1);
code2 = TYPE_CODE (type2);
+ is_int1 = is_integral_type (type1);
+ is_int2 = is_integral_type (type2);
- if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL) &&
- (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
+ if (is_int1 && is_int2)
return longest_to_int (value_as_long (value_binop (arg1, arg2,
BINOP_LESS)));
- else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL)
- && (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
+ else if ((code1 == TYPE_CODE_FLT || is_int1)
+ && (code2 == TYPE_CODE_FLT || is_int2))
return value_as_double (arg1) < value_as_double (arg2);
else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR)
return value_as_address (arg1) < value_as_address (arg2);
/* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
is bigger. */
- else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
+ else if (code1 == TYPE_CODE_PTR && is_int2)
return value_as_address (arg1) < (CORE_ADDR) value_as_long (arg2);
- else if (code2 == TYPE_CODE_PTR && (code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL))
+ else if (code2 == TYPE_CODE_PTR && is_int1)
return (CORE_ADDR) value_as_long (arg1) < value_as_address (arg2);
else if (code1 == TYPE_CODE_STRING && code2 == TYPE_CODE_STRING)
return value_strcmp (arg1, arg2) < 0;
struct value *
value_neg (struct value *arg1)
{
- register struct type *type;
- register struct type *result_type = VALUE_TYPE (arg1);
+ struct type *type;
+ struct type *result_type = VALUE_TYPE (arg1);
COERCE_REF (arg1);
- COERCE_ENUM (arg1);
type = check_typedef (VALUE_TYPE (arg1));
if (TYPE_CODE (type) == TYPE_CODE_FLT)
return value_from_double (result_type, -value_as_double (arg1));
- else if (TYPE_CODE (type) == TYPE_CODE_INT || TYPE_CODE (type) == TYPE_CODE_BOOL)
+ else if (is_integral_type (type))
{
- /* Perform integral promotion for ANSI C/C++.
- FIXME: What about FORTRAN and chill ? */
+ /* Perform integral promotion for ANSI C/C++. FIXME: What about
+ FORTRAN and (the deleted) chill ? */
if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int))
result_type = builtin_type_int;
struct value *
value_complement (struct value *arg1)
{
- register struct type *type;
- register struct type *result_type = VALUE_TYPE (arg1);
- int typecode;
+ struct type *type;
+ struct type *result_type = VALUE_TYPE (arg1);
COERCE_REF (arg1);
- COERCE_ENUM (arg1);
type = check_typedef (VALUE_TYPE (arg1));
- typecode = TYPE_CODE (type);
- if ((typecode != TYPE_CODE_INT) && (typecode != TYPE_CODE_BOOL))
+ if (!is_integral_type (type))
error ("Argument to complement operation not an integer or boolean.");
/* Perform integral promotion for ANSI C/C++.
projects / deliverable / binutils-gdb.git / blobdiff