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/*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 2001 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#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, double value)
{
fv->value.floating = value;
}
static double
value_get_floating(fvalue_t *fv)
{
return fv->value.floating;
}
static bool
val_from_literal(fvalue_t *fv, const char *s, bool allow_partial_value _U_, char **err_msg)
{
char *endptr = NULL;
fv->value.floating = g_ascii_strtod(s, &endptr);
if (endptr == s || *endptr != '\0') {
/* This isn't a valid number. */
if (err_msg != NULL)
*err_msg = ws_strdup_printf("\"%s\" is not a valid floating-point number.", s);
return false;
}
if (errno == ERANGE) {
if (fv->value.floating == 0) {
if (err_msg != NULL)
*err_msg = ws_strdup_printf("\"%s\" causes floating-point underflow.", s);
}
else if (fv->value.floating == HUGE_VAL) {
if (err_msg != NULL)
*err_msg = ws_strdup_printf("\"%s\" causes floating-point overflow.", s);
}
else {
if (err_msg != NULL)
*err_msg = ws_strdup_printf("\"%s\" is not a valid floating-point number.",
s);
}
return false;
}
return true;
}
static char *
float_val_to_repr(wmem_allocator_t *scope, const fvalue_t *fv, ftrepr_t rtype, int field_display _U_)
{
char *buf = wmem_alloc(scope, G_ASCII_DTOSTR_BUF_SIZE);
if (rtype == FTREPR_DFILTER)
g_ascii_dtostr(buf, G_ASCII_DTOSTR_BUF_SIZE, fv->value.floating);
else
g_ascii_formatd(buf, G_ASCII_DTOSTR_BUF_SIZE, "%." G_STRINGIFY(FLT_DIG) "g", fv->value.floating);
return buf;
}
static char *
double_val_to_repr(wmem_allocator_t *scope, const fvalue_t *fv, ftrepr_t rtype, int field_display _U_)
{
char *buf = wmem_alloc(scope, G_ASCII_DTOSTR_BUF_SIZE);
if (rtype == FTREPR_DFILTER)
g_ascii_dtostr(buf, G_ASCII_DTOSTR_BUF_SIZE, fv->value.floating);
else
g_ascii_formatd(buf, G_ASCII_DTOSTR_BUF_SIZE, "%." G_STRINGIFY(DBL_DIG) "g", fv->value.floating);
return buf;
}
static enum ft_result
val_unary_minus(fvalue_t * dst, const fvalue_t *src, char **err_ptr _U_)
{
dst->value.floating = -src->value.floating;
return FT_OK;
}
static enum ft_result
val_add(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
{
dst->value.floating = a->value.floating + b->value.floating;
return FT_OK;
}
static enum ft_result
val_subtract(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
{
dst->value.floating = a->value.floating - b->value.floating;
return FT_OK;
}
static enum ft_result
val_multiply(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
{
dst->value.floating = a->value.floating * b->value.floating;
return FT_OK;
}
static enum ft_result
val_divide(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
{
dst->value.floating = a->value.floating / b->value.floating;
return FT_OK;
}
static enum ft_result
cmp_order(const fvalue_t *a, const fvalue_t *b, int *cmp)
{
if (a->value.floating < b->value.floating)
*cmp = -1;
else if (a->value.floating > b->value.floating)
*cmp = 1;
else
*cmp = 0;
return FT_OK;
}
static bool
val_is_zero(const fvalue_t *fv_a)
{
return fv_a->value.floating == 0;
}
static bool
val_is_negative(const fvalue_t *fv_a)
{
return fv_a->value.floating < 0;
}
static unsigned
val_hash(const fvalue_t *fv)
{
return g_double_hash(&fv->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, /* copy_value */
NULL, /* free_value */
val_from_literal, /* val_from_literal */
NULL, /* val_from_string */
NULL, /* val_from_charconst */
float_val_to_repr, /* val_to_string_repr */
NULL, /* val_to_uinteger64 */
NULL, /* val_to_sinteger64 */
{ .set_value_floating = double_fvalue_set_floating }, /* union set_value */
{ .get_value_floating = value_get_floating }, /* union get_value */
cmp_order,
NULL, /* cmp_contains */
NULL, /* cmp_matches */
val_hash, /* hash */
val_is_zero, /* is_zero */
val_is_negative, /* is_negative */
NULL, /* len */
NULL, /* slice */
NULL, /* bitwise_and */
val_unary_minus, /* unary_minus */
val_add, /* add */
val_subtract, /* subtract */
val_multiply, /* multiply */
val_divide, /* divide */
NULL, /* modulo */
};
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, /* copy_value */
NULL, /* free_value */
val_from_literal, /* val_from_literal */
NULL, /* val_from_string */
NULL, /* val_from_charconst */
double_val_to_repr, /* val_to_string_repr */
NULL, /* val_to_uinteger64 */
NULL, /* val_to_sinteger64 */
{ .set_value_floating = double_fvalue_set_floating }, /* union set_value */
{ .get_value_floating = value_get_floating }, /* union get_value */
cmp_order,
NULL, /* cmp_contains */
NULL, /* cmp_matches */
val_hash, /* hash */
val_is_zero, /* is_zero */
val_is_negative, /* is_negative */
NULL, /* len */
NULL, /* slice */
NULL, /* bitwise_and */
val_unary_minus, /* unary_minus */
val_add, /* add */
val_subtract, /* subtract */
val_multiply, /* multiply */
val_divide, /* divide */
NULL, /* modulo */
};
ftype_register(FT_FLOAT, &float_type);
ftype_register(FT_DOUBLE, &double_type);
}
void
ftype_register_pseudofields_double(int proto)
{
static int hf_ft_float;
static int hf_ft_double;
static hf_register_info hf_ftypes[] = {
{ &hf_ft_float,
{ "FT_FLOAT", "_ws.ftypes.float",
FT_FLOAT, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_ft_double,
{ "FT_DOUBLE", "_ws.ftypes.double",
FT_DOUBLE, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
};
proto_register_field_array(proto, hf_ftypes, array_length(hf_ftypes));
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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