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/*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 2001 Gerald Combs
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <ftypes-int.h>
#include <math.h>
#include <errno.h>
#include <float.h>
#include "strutil.h"
static void
double_fvalue_new(fvalue_t *fv)
{
fv->value.floating = 0.0;
}
static void
double_fvalue_set_floating(fvalue_t *fv, gdouble value)
{
fv->value.floating = value;
}
static double
value_get_floating(fvalue_t *fv)
{
return fv->value.floating;
}
static gboolean
val_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
{
char *endptr = NULL;
fv->value.floating = strtod(s, &endptr);
if (endptr == s || *endptr != '\0') {
/* This isn't a valid number. */
logfunc("\"%s\" is not a valid number.", s);
return FALSE;
}
if (errno == ERANGE) {
if (fv->value.floating == 0) {
logfunc("\"%s\" causes floating-point underflow.", s);
}
else if (fv->value.floating == HUGE_VAL) {
logfunc("\"%s\" causes floating-point overflow.", s);
}
else {
logfunc("\"%s\" is not a valid floating-point number.",
s);
}
return FALSE;
}
return TRUE;
}
static int
float_val_repr_len(fvalue_t *fv _U_, ftrepr_t rtype _U_)
{
/*
* 1 character for a sign.
* 26 characters for a Really Big Number.
* XXX - is that platform-dependent?
* XXX - smaller for float than for double?
* XXX - can we compute it from FLT_DIG and the like?
*/
return 1 + 26;
}
static void
float_val_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
{
sprintf(buf, "%." STRINGIFY(FLT_DIG) "g", fv->value.floating);
}
static int
double_val_repr_len(fvalue_t *fv _U_, ftrepr_t rtype _U_)
{
/*
* 1 character for a sign.
* 26 characters for a Really Big Number.
* XXX - is that platform-dependent?
* XXX - can we compute it from DBL_DIG and the like?
*/
return 1 + 26;
}
static void
double_val_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
{
sprintf(buf, "%." STRINGIFY(DBL_DIG) "g", fv->value.floating);
}
static gboolean
cmp_eq(fvalue_t *a, fvalue_t *b)
{
return a->value.floating == b->value.floating;
}
static gboolean
cmp_ne(fvalue_t *a, fvalue_t *b)
{
return a->value.floating != b->value.floating;
}
static gboolean
cmp_gt(fvalue_t *a, fvalue_t *b)
{
return a->value.floating > b->value.floating;
}
static gboolean
cmp_ge(fvalue_t *a, fvalue_t *b)
{
return a->value.floating >= b->value.floating;
}
static gboolean
cmp_lt(fvalue_t *a, fvalue_t *b)
{
return a->value.floating < b->value.floating;
}
static gboolean
cmp_le(fvalue_t *a, fvalue_t *b)
{
return a->value.floating <= b->value.floating;
}
void
ftype_register_double(void)
{
static ftype_t float_type = {
FT_FLOAT, /* ftype */
"FT_FLOAT", /* name */
"floating point (single-precision)", /* pretty_name */
0, /* wire_size */
double_fvalue_new, /* new_value */
NULL, /* free_value */
val_from_unparsed, /* val_from_unparsed */
NULL, /* val_from_string */
float_val_to_repr, /* val_to_string_repr */
float_val_repr_len, /* len_string_repr */
NULL, /* set_value */
NULL, /* set_value_uinteger */
NULL, /* set_value_snteger */
NULL, /* set_value_integer64 */
double_fvalue_set_floating, /* set_value_floating */
NULL, /* get_value */
NULL, /* get_value_uinteger */
NULL, /* get_value_sinteger */
NULL, /* get_value_integer64 */
value_get_floating, /* get_value_floating */
cmp_eq,
cmp_ne,
cmp_gt,
cmp_ge,
cmp_lt,
cmp_le,
NULL, /* cmp_bitwise_and */
NULL, /* cmp_contains */
NULL, /* cmp_matches */
NULL,
NULL,
};
static ftype_t double_type = {
FT_DOUBLE, /* ftype */
"FT_DOUBLE", /* name */
"floating point (double-precision)", /* pretty_name */
0, /* wire_size */
double_fvalue_new, /* new_value */
NULL, /* free_value */
val_from_unparsed, /* val_from_unparsed */
NULL, /* val_from_string */
double_val_to_repr, /* val_to_string_repr */
double_val_repr_len, /* len_string_repr */
NULL, /* set_value */
NULL, /* set_value_uinteger */
NULL, /* set_value_sinteger */
NULL, /* set_value_integer64 */
double_fvalue_set_floating, /* set_value_floating */
NULL, /* get_value */
NULL, /* get_value_uinteger */
NULL, /* get_value_snteger */
NULL, /* get_value_integer64 */
value_get_floating, /* get_value_floating */
cmp_eq,
cmp_ne,
cmp_gt,
cmp_ge,
cmp_lt,
cmp_le,
NULL, /* cmp_bitwise_and */
NULL, /* cmp_contains */
NULL, /* cmp_matches */
NULL,
NULL,
};
ftype_register(FT_FLOAT, &float_type);
ftype_register(FT_DOUBLE, &double_type);
}
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