/* Perform arithmetic and other operations on values, for GDB.
- Copyright 1986, 89, 91, 92, 93, 94, 95, 96, 97, 1998
+ Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002
Free Software Foundation, Inc.
This file is part of GDB.
#include "expression.h"
#include "target.h"
#include "language.h"
-#include "demangle.h"
#include "gdb_string.h"
+#include "doublest.h"
+#include <math.h>
/* Define whether or not the C operator '/' truncates towards zero for
differently signed operands (truncation direction is undefined in C). */
#define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
#endif
-static value_ptr value_subscripted_rvalue PARAMS ((value_ptr, value_ptr, int));
+static struct value *value_subscripted_rvalue (struct value *, struct value *, int);
-void _initialize_valarith PARAMS ((void));
+void _initialize_valarith (void);
\f
-value_ptr
-value_add (arg1, arg2)
- value_ptr arg1, arg2;
+struct value *
+value_add (struct value *arg1, struct value *arg2)
{
- register value_ptr valint, valptr;
+ struct value *valint;
+ struct value *valptr;
register int len;
struct type *type1, *type2, *valptrtype;
|| TYPE_CODE (type2) == TYPE_CODE_INT))
/* Exactly one argument is a pointer, and one is an integer. */
{
- value_ptr retval;
+ struct value *retval;
if (TYPE_CODE (type1) == TYPE_CODE_PTR)
{
len = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (valptrtype)));
if (len == 0)
len = 1; /* For (void *) */
- retval = value_from_longest (valptrtype,
- value_as_long (valptr)
+ retval = value_from_pointer (valptrtype,
+ value_as_address (valptr)
+ (len * value_as_long (valint)));
VALUE_BFD_SECTION (retval) = VALUE_BFD_SECTION (valptr);
return retval;
return value_binop (arg1, arg2, BINOP_ADD);
}
-value_ptr
-value_sub (arg1, arg2)
- value_ptr arg1, arg2;
+struct value *
+value_sub (struct value *arg1, struct value *arg2)
{
struct type *type1, *type2;
COERCE_NUMBER (arg1);
{
/* pointer - integer. */
LONGEST sz = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)));
- return value_from_longest
- (VALUE_TYPE (arg1),
- value_as_long (arg1) - (sz * value_as_long (arg2)));
+ return value_from_pointer (type1,
+ (value_as_address (arg1)
+ - (sz * value_as_long (arg2))));
}
else if (TYPE_CODE (type2) == TYPE_CODE_PTR
- && TYPE_LENGTH (TYPE_TARGET_TYPE (type1))
- == TYPE_LENGTH (TYPE_TARGET_TYPE (type2)))
+ && TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)))
+ == TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type2))))
{
/* pointer to <type x> - pointer to <type x>. */
LONGEST sz = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)));
FIXME: Perhaps we should validate that the index is valid and if
verbosity is set, warn about invalid indices (but still use them). */
-value_ptr
-value_subscript (array, idx)
- value_ptr array, idx;
+struct value *
+value_subscript (struct value *array, struct value *idx)
{
- value_ptr bound;
+ struct value *bound;
int c_style = current_language->c_style_arrays;
struct type *tarray;
{
struct type *range_type = TYPE_INDEX_TYPE (tarray);
LONGEST index = value_as_long (idx);
- value_ptr v;
+ struct value *v;
int offset, byte, bit_index;
LONGEST lowerbound, upperbound;
get_discrete_bounds (range_type, &lowerbound, &upperbound);
(eg, a vector register). This routine used to promote floats
to doubles, but no longer does. */
-static value_ptr
-value_subscripted_rvalue (array, idx, lowerbound)
- value_ptr array, idx;
- int lowerbound;
+static struct value *
+value_subscripted_rvalue (struct value *array, struct value *idx, int lowerbound)
{
struct type *array_type = check_typedef (VALUE_TYPE (array));
struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (array_type));
unsigned int elt_size = TYPE_LENGTH (elt_type);
LONGEST index = value_as_long (idx);
unsigned int elt_offs = elt_size * longest_to_int (index - lowerbound);
- value_ptr v;
+ struct value *v;
if (index < lowerbound || elt_offs >= TYPE_LENGTH (array_type))
error ("no such vector element");
For now, we do not overload the `=' operator. */
int
-binop_user_defined_p (op, arg1, arg2)
- enum exp_opcode op;
- value_ptr arg1, arg2;
+binop_user_defined_p (enum exp_opcode op, struct value *arg1, struct value *arg2)
{
struct type *type1, *type2;
if (op == BINOP_ASSIGN || op == BINOP_CONCAT)
For now, we do not overload the `&' operator. */
int
-unop_user_defined_p (op, arg1)
- enum exp_opcode op;
- value_ptr arg1;
+unop_user_defined_p (enum exp_opcode op, struct value *arg1)
{
struct type *type1;
if (op == UNOP_ADDR)
is the opcode saying how to modify it. Otherwise, OTHEROP is
unused. */
-value_ptr
-value_x_binop (arg1, arg2, op, otherop, noside)
- value_ptr arg1, arg2;
- enum exp_opcode op, otherop;
- enum noside noside;
+struct value *
+value_x_binop (struct value *arg1, struct value *arg2, enum exp_opcode op,
+ enum exp_opcode otherop, enum noside noside)
{
- value_ptr *argvec;
+ struct value **argvec;
char *ptr;
char tstr[13];
int static_memfuncp;
if (TYPE_CODE (check_typedef (VALUE_TYPE (arg1))) != TYPE_CODE_STRUCT)
error ("Can't do that binary op on that type"); /* FIXME be explicit */
- argvec = (value_ptr *) alloca (sizeof (value_ptr) * 4);
+ argvec = (struct value **) alloca (sizeof (struct value *) * 4);
argvec[1] = value_addr (arg1);
argvec[2] = arg2;
argvec[3] = 0;
and return that value (where '@' is (almost) any unary operator which
is legal for GNU C++). */
-value_ptr
-value_x_unop (arg1, op, noside)
- value_ptr arg1;
- enum exp_opcode op;
- enum noside noside;
+struct value *
+value_x_unop (struct value *arg1, enum exp_opcode op, enum noside noside)
{
- value_ptr *argvec;
+ struct value **argvec;
char *ptr, *mangle_ptr;
char tstr[13], mangle_tstr[13];
int static_memfuncp;
if (TYPE_CODE (check_typedef (VALUE_TYPE (arg1))) != TYPE_CODE_STRUCT)
error ("Can't do that unary op on that type"); /* FIXME be explicit */
- argvec = (value_ptr *) alloca (sizeof (value_ptr) * 3);
+ argvec = (struct value **) alloca (sizeof (struct value *) * 3);
argvec[1] = value_addr (arg1);
argvec[2] = 0;
string values of length 1.
*/
-value_ptr
-value_concat (arg1, arg2)
- value_ptr arg1, arg2;
+struct value *
+value_concat (struct value *arg1, struct value *arg2)
{
- register value_ptr inval1, inval2, outval;
+ struct value *inval1;
+ struct value *inval2;
+ struct value *outval = NULL;
int inval1len, inval2len;
int count, idx;
char *ptr;
Does not support addition and subtraction on pointers;
use value_add or value_sub if you want to handle those possibilities. */
-value_ptr
-value_binop (arg1, arg2, op)
- value_ptr arg1, arg2;
- enum exp_opcode op;
+struct value *
+value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op)
{
- register value_ptr val;
+ struct value *val;
struct type *type1, *type2;
COERCE_REF (arg1);
/* FIXME-if-picky-about-floating-accuracy: Should be doing this
in target format. real.c in GCC probably has the necessary
code. */
- DOUBLEST v1, v2, v;
+ DOUBLEST v1, v2, v = 0;
v1 = value_as_double (arg1);
v2 = value_as_double (arg2);
switch (op)
v = v1 / v2;
break;
+ case BINOP_EXP:
+ v = pow (v1, v2);
+ if (errno)
+ error ("Cannot perform exponentiation: %s", strerror (errno));
+ break;
+
default:
error ("Integer-only operation on floating point number.");
}
else
val = allocate_value (builtin_type_double);
- store_floating (VALUE_CONTENTS_RAW (val), TYPE_LENGTH (VALUE_TYPE (val)),
- v);
+ store_typed_floating (VALUE_CONTENTS_RAW (val), VALUE_TYPE (val), v);
}
else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
&&
TYPE_CODE (type2) == TYPE_CODE_BOOL)
{
- LONGEST v1, v2, v;
+ LONGEST v1, v2, v = 0;
v1 = value_as_long (arg1);
v2 = value_as_long (arg2);
case BINOP_BITWISE_XOR:
v = v1 ^ v2;
+ break;
+
+ case BINOP_EQUAL:
+ v = v1 == v2;
+ break;
+
+ case BINOP_NOTEQUAL:
+ v = v1 != v2;
break;
default:
if (unsigned_operation)
{
- ULONGEST v1, v2, v;
+ ULONGEST v1, v2, v = 0;
v1 = (ULONGEST) value_as_long (arg1);
v2 = (ULONGEST) value_as_long (arg2);
v = v1 / v2;
break;
+ case BINOP_EXP:
+ v = pow (v1, v2);
+ if (errno)
+ error ("Cannot perform exponentiation: %s", strerror (errno));
+ break;
+
case BINOP_REM:
v = v1 % v2;
break;
v = v1 == v2;
break;
+ case BINOP_NOTEQUAL:
+ v = v1 != v2;
+ break;
+
case BINOP_LESS:
v = v1 < v2;
break;
}
else
{
- LONGEST v1, v2, v;
+ LONGEST v1, v2, v = 0;
v1 = value_as_long (arg1);
v2 = value_as_long (arg2);
case BINOP_DIV:
v = v1 / v2;
+ break;
+
+ case BINOP_EXP:
+ v = pow (v1, v2);
+ if (errno)
+ error ("Cannot perform exponentiation: %s", strerror (errno));
break;
case BINOP_REM:
/* Simulate the C operator ! -- return 1 if ARG1 contains zero. */
int
-value_logical_not (arg1)
- value_ptr arg1;
+value_logical_not (struct value *arg1)
{
register int len;
register char *p;
return len < 0;
}
+/* Perform a comparison on two string values (whose content are not
+ necessarily null terminated) based on their length */
+
+static int
+value_strcmp (struct value *arg1, struct value *arg2)
+{
+ int len1 = TYPE_LENGTH (VALUE_TYPE (arg1));
+ int len2 = TYPE_LENGTH (VALUE_TYPE (arg2));
+ char *s1 = VALUE_CONTENTS (arg1);
+ char *s2 = VALUE_CONTENTS (arg2);
+ int i, len = len1 < len2 ? len1 : len2;
+
+ for (i = 0; i < len; i++)
+ {
+ if (s1[i] < s2[i])
+ return -1;
+ else if (s1[i] > s2[i])
+ return 1;
+ else
+ continue;
+ }
+
+ if (len1 < len2)
+ return -1;
+ else if (len1 > len2)
+ return 1;
+ else
+ return 0;
+}
+
/* Simulate the C operator == by returning a 1
iff ARG1 and ARG2 have equal contents. */
int
-value_equal (arg1, arg2)
- register value_ptr arg1, arg2;
-
+value_equal (struct value *arg1, struct value *arg2)
{
register int len;
register char *p1, *p2;
/* 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))
- return value_as_pointer (arg1) == (CORE_ADDR) value_as_long (arg2);
+ 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))
- return (CORE_ADDR) value_as_long (arg1) == value_as_pointer (arg2);
+ return (CORE_ADDR) value_as_long (arg1) == value_as_address (arg2);
else if (code1 == code2
&& ((len = (int) TYPE_LENGTH (type1))
}
return len < 0;
}
+ else if (code1 == TYPE_CODE_STRING && code2 == TYPE_CODE_STRING)
+ {
+ return value_strcmp (arg1, arg2) == 0;
+ }
else
{
error ("Invalid type combination in equality test.");
iff ARG1's contents are less than ARG2's. */
int
-value_less (arg1, arg2)
- register value_ptr arg1, arg2;
+value_less (struct value *arg1, struct value *arg2)
{
register enum type_code code1;
register enum type_code code2;
&& (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
return value_as_double (arg1) < value_as_double (arg2);
else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR)
- return value_as_pointer (arg1) < value_as_pointer (arg2);
+ 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))
- return value_as_pointer (arg1) < (CORE_ADDR) value_as_long (arg2);
+ 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))
- return (CORE_ADDR) value_as_long (arg1) < value_as_pointer (arg2);
-
+ 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;
else
{
error ("Invalid type combination in ordering comparison.");
\f
/* The unary operators - and ~. Both free the argument ARG1. */
-value_ptr
-value_neg (arg1)
- register value_ptr arg1;
+struct value *
+value_neg (struct value *arg1)
{
register struct type *type;
register struct type *result_type = VALUE_TYPE (arg1);
}
}
-value_ptr
-value_complement (arg1)
- register value_ptr arg1;
+struct value *
+value_complement (struct value *arg1)
{
register struct type *type;
register struct type *result_type = VALUE_TYPE (arg1);
Return -1 if out of range, -2 other error. */
int
-value_bit_index (type, valaddr, index)
- struct type *type;
- char *valaddr;
- int index;
+value_bit_index (struct type *type, char *valaddr, int index)
{
LONGEST low_bound, high_bound;
LONGEST word;
return (word >> rel_index) & 1;
}
-value_ptr
-value_in (element, set)
- value_ptr element, set;
+struct value *
+value_in (struct value *element, struct value *set)
{
int member;
struct type *settype = check_typedef (VALUE_TYPE (set));
}
void
-_initialize_valarith ()
+_initialize_valarith (void)
{
}
projects / deliverable / binutils-gdb.git / blobdiff