/* Perform arithmetic and other operations on values, for GDB.
- Copyright (C) 1986, 1989 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
-#include "param.h"
-#include "symtab.h"
#include "value.h"
+#include "symtab.h"
+#include "gdbtypes.h"
#include "expression.h"
+#include "target.h"
+#include <string.h>
-\f
-value value_x_binop ();
-value value_subscripted_rvalue ();
+static value
+value_subscripted_rvalue PARAMS ((value, value));
+\f
value
value_add (arg1, arg2)
value arg1, arg2;
{
- register value val, valint, valptr;
+ register value valint, valptr;
register int len;
COERCE_ARRAY (arg1);
}
len = TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (valptr)));
if (len == 0) len = 1; /* For (void *) */
- val = value_from_long (builtin_type_long,
- value_as_long (valptr)
- + (len * value_as_long (valint)));
- VALUE_TYPE (val) = VALUE_TYPE (valptr);
- return val;
+ return value_from_longest (VALUE_TYPE (valptr),
+ value_as_long (valptr)
+ + (len * value_as_long (valint)));
}
return value_binop (arg1, arg2, BINOP_ADD);
value_sub (arg1, arg2)
value arg1, arg2;
{
- register value val;
COERCE_ARRAY (arg1);
COERCE_ARRAY (arg2);
- if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR
- &&
- TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_INT)
+ if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR)
{
- val = value_from_long (builtin_type_long,
- value_as_long (arg1)
- - TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))) * value_as_long (arg2));
- VALUE_TYPE (val) = VALUE_TYPE (arg1);
- return val;
- }
-
- if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR
- &&
- VALUE_TYPE (arg1) == VALUE_TYPE (arg2))
- {
- val = value_from_long (builtin_type_long,
- (value_as_long (arg1) - value_as_long (arg2))
- / TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))));
- return val;
+ if (TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_INT)
+ {
+ /* pointer - integer. */
+ return value_from_longest
+ (VALUE_TYPE (arg1),
+ value_as_long (arg1)
+ - (TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)))
+ * value_as_long (arg2)));
+ }
+ else if (VALUE_TYPE (arg1) == VALUE_TYPE (arg2))
+ {
+ /* pointer to <type x> - pointer to <type x>. */
+ return value_from_longest
+ (builtin_type_long, /* FIXME -- should be ptrdiff_t */
+ (value_as_long (arg1) - value_as_long (arg2))
+ / TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))));
+ }
+ else
+ {
+ error ("\
+First argument of `-' is a pointer and second argument is neither\n\
+an integer nor a pointer of the same type.");
+ }
}
return value_binop (arg1, arg2, BINOP_SUB);
}
/* Return the value of EXPR[IDX], expr an aggregate rvalue
- (eg, a vector register) */
+ (eg, a vector register). This routine used to promote floats
+ to doubles, but no longer does. */
-value
+static value
value_subscripted_rvalue (array, idx)
value array, idx;
{
struct type *elt_type = TYPE_TARGET_TYPE (VALUE_TYPE (array));
int elt_size = TYPE_LENGTH (elt_type);
- int elt_offs = elt_size * value_as_long (idx);
+ int elt_offs = elt_size * longest_to_int (value_as_long (idx));
value v;
if (elt_offs >= TYPE_LENGTH (VALUE_TYPE (array)))
error ("no such vector element");
- if (TYPE_CODE (elt_type) == TYPE_CODE_FLT)
- {
- if (elt_size == sizeof (float))
- v = value_from_double (elt_type, (double) *(float *)
- (VALUE_CONTENTS (array) + elt_offs));
- else
- v = value_from_double (elt_type, *(double *)
- (VALUE_CONTENTS (array) + elt_offs));
- }
- else
- {
- int offs;
- union {int i; char c;} test;
- test.i = 1;
- if (test.c == 1)
- offs = 0;
- else
- offs = sizeof (LONGEST) - elt_size;
- v = value_from_long (elt_type, *(LONGEST *)
- (VALUE_CONTENTS (array) + elt_offs - offs));
- }
+ v = allocate_value (elt_type);
+ (void) memcpy (VALUE_CONTENTS (v), VALUE_CONTENTS (array) + elt_offs,
+ elt_size);
if (VALUE_LVAL (array) == lval_internalvar)
VALUE_LVAL (v) = lval_internalvar_component;
/* We know either arg1 or arg2 is a structure, so try to find the right
user defined function. Create an argument vector that calls
arg1.operator @ (arg1,arg2) and return that value (where '@' is any
- binary operator which is legal for GNU C++). */
+ binary operator which is legal for GNU C++).
+
+ OP is the operatore, and if it is BINOP_ASSIGN_MODIFY, then OTHEROP
+ is the opcode saying how to modify it. Otherwise, OTHEROP is
+ unused. */
value
value_x_binop (arg1, arg2, op, otherop)
value arg1, arg2;
- int op, otherop;
+ enum exp_opcode op, otherop;
{
value * argvec;
char *ptr;
char tstr[13];
int static_memfuncp;
+ COERCE_REF (arg1);
+ COERCE_REF (arg2);
COERCE_ENUM (arg1);
COERCE_ENUM (arg2);
arg vector and find the right function to call it with. */
if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
- error ("friend functions not implemented yet");
+ error ("Can't do that binary op on that type"); /* FIXME be explicit */
argvec = (value *) alloca (sizeof (value) * 4);
argvec[1] = value_addr (arg1);
argvec[3] = 0;
/* make the right function name up */
- strcpy(tstr, "operator __");
- ptr = tstr+9;
+ strcpy(tstr, "operator__");
+ ptr = tstr+8;
switch (op)
{
case BINOP_ADD: strcpy(ptr,"+"); break;
default:
error ("Invalid binary operation specified.");
}
- argvec[0] = value_struct_elt (arg1, argvec+1, tstr, &static_memfuncp, "structure");
+ argvec[0] = value_struct_elt (&arg1, argvec+1, tstr, &static_memfuncp, "structure");
if (argvec[0])
{
if (static_memfuncp)
argvec[1] = argvec[0];
argvec++;
}
- return call_function (argvec[0], 2 - static_memfuncp, argvec + 1);
+ return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1);
}
error ("member function %s not found", tstr);
+#ifdef lint
+ return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1);
+#endif
}
/* We know that arg1 is a structure, so try to find a unary user
value
value_x_unop (arg1, op)
value arg1;
- int op;
+ enum exp_opcode op;
{
value * argvec;
char *ptr;
arg vector and find the right function to call it with. */
if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
- error ("friend functions not implemented yet");
+ error ("Can't do that unary op on that type"); /* FIXME be explicit */
argvec = (value *) alloca (sizeof (value) * 3);
argvec[1] = value_addr (arg1);
argvec[2] = 0;
/* make the right function name up */
- strcpy(tstr,"operator __");
- ptr = tstr+9;
+ strcpy(tstr,"operator__");
+ ptr = tstr+8;
switch (op)
{
case UNOP_PREINCREMENT: strcpy(ptr,"++"); break;
default:
error ("Invalid binary operation specified.");
}
- argvec[0] = value_struct_elt (arg1, argvec+1, tstr, static_memfuncp, "structure");
+ argvec[0] = value_struct_elt (&arg1, argvec+1, tstr, &static_memfuncp, "structure");
if (argvec[0])
{
if (static_memfuncp)
argvec[1] = argvec[0];
argvec++;
}
- return call_function (argvec[0], 1 - static_memfuncp, argvec + 1);
+ return call_function_by_hand (argvec[0], 1 - static_memfuncp, argvec + 1);
}
error ("member function %s not found", tstr);
+ return 0; /* For lint -- never reached */
}
\f
/* Perform a binary operation on two integers or two floats.
value
value_binop (arg1, arg2, op)
value arg1, arg2;
- int op;
+ enum exp_opcode op;
{
register value val;
}
val = allocate_value (builtin_type_double);
- *(double *) VALUE_CONTENTS (val) = v;
+ SWAP_TARGET_AND_HOST (&v, sizeof (v));
+ *(double *) VALUE_CONTENTS_RAW (val) = v;
}
else
/* Integral operations here. */
}
val = allocate_value (BUILTIN_TYPE_UNSIGNED_LONGEST);
- *(unsigned LONGEST *) VALUE_CONTENTS (val) = v;
+ SWAP_TARGET_AND_HOST (&v, sizeof (v));
+ *(unsigned LONGEST *) VALUE_CONTENTS_RAW (val) = v;
}
else
{
}
val = allocate_value (BUILTIN_TYPE_LONGEST);
- *(LONGEST *) VALUE_CONTENTS (val) = v;
+ SWAP_TARGET_AND_HOST (&v, sizeof (v));
+ *(LONGEST *) VALUE_CONTENTS_RAW (val) = v;
}
}
return val;
}
\f
-/* Simulate the C operator ! -- return 1 if ARG1 contains zeros. */
+/* Simulate the C operator ! -- return 1 if ARG1 contains zero. */
int
value_zerop (arg1)
COERCE_ARRAY (arg1);
+ if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_FLT)
+ return 0 == value_as_double (arg1);
+
len = TYPE_LENGTH (VALUE_TYPE (arg1));
p = VALUE_CONTENTS (arg1);
else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT)
&& (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT))
return value_as_double (arg1) == value_as_double (arg2);
- else if ((code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_INT)
- || (code2 == TYPE_CODE_PTR && code1 == TYPE_CODE_INT))
- return (char *) value_as_long (arg1) == (char *) value_as_long (arg2);
+
+ /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
+ is bigger. */
+ else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_INT)
+ return value_as_pointer (arg1) == (CORE_ADDR) value_as_long (arg2);
+ else if (code2 == TYPE_CODE_PTR && code1 == TYPE_CODE_INT)
+ return (CORE_ADDR) value_as_long (arg1) == value_as_pointer (arg2);
+
else if (code1 == code2
&& ((len = TYPE_LENGTH (VALUE_TYPE (arg1)))
== TYPE_LENGTH (VALUE_TYPE (arg2))))
return len < 0;
}
else
- error ("Invalid type combination in equality test.");
+ {
+ error ("Invalid type combination in equality test.");
+ return 0; /* For lint -- never reached */
+ }
}
/* Simulate the C operator < by returning 1
code2 = TYPE_CODE (VALUE_TYPE (arg2));
if (code1 == TYPE_CODE_INT && code2 == TYPE_CODE_INT)
- return value_as_long (arg1) < value_as_long (arg2);
+ {
+ if (TYPE_UNSIGNED (VALUE_TYPE (arg1))
+ || TYPE_UNSIGNED (VALUE_TYPE (arg2)))
+ return ((unsigned LONGEST) value_as_long (arg1)
+ < (unsigned LONGEST) value_as_long (arg2));
+ else
+ return value_as_long (arg1) < value_as_long (arg2);
+ }
else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT)
&& (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT))
return value_as_double (arg1) < value_as_double (arg2);
- else if ((code1 == TYPE_CODE_PTR || code1 == TYPE_CODE_INT)
- && (code2 == TYPE_CODE_PTR || code2 == TYPE_CODE_INT))
- return (char *) value_as_long (arg1) < (char *) value_as_long (arg2);
+ else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR)
+ return value_as_pointer (arg1) < value_as_pointer (arg2);
+
+ /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
+ is bigger. */
+ else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_INT)
+ return value_as_pointer (arg1) < (CORE_ADDR) value_as_long (arg2);
+ else if (code2 == TYPE_CODE_PTR && code1 == TYPE_CODE_INT)
+ return (CORE_ADDR) value_as_long (arg1) < value_as_pointer (arg2);
+
else
- error ("Invalid type combination in ordering comparison.");
+ {
+ error ("Invalid type combination in ordering comparison.");
+ return 0;
+ }
}
\f
/* The unary operators - and ~. Both free the argument ARG1. */
if (TYPE_CODE (type) == TYPE_CODE_FLT)
return value_from_double (type, - value_as_double (arg1));
else if (TYPE_CODE (type) == TYPE_CODE_INT)
- return value_from_long (type, - value_as_long (arg1));
- else
+ return value_from_longest (type, - value_as_long (arg1));
+ else {
error ("Argument to negate operation not a number.");
+ return 0; /* For lint -- never reached */
+ }
}
value
if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_INT)
error ("Argument to complement operation not an integer.");
- return value_from_long (VALUE_TYPE (arg1), ~ value_as_long (arg1));
+ return value_from_longest (VALUE_TYPE (arg1), ~ value_as_long (arg1));
}
\f
projects / deliverable / binutils-gdb.git / blobdiff