177 lines
3.2 KiB
C
177 lines
3.2 KiB
C
/*
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* $Id: ftype-double.c,v 1.7 2002/08/28 20:41:00 jmayer Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 2001 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <ftypes-int.h>
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#include <stdlib.h>
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#include <math.h>
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#include <errno.h>
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static void
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double_fvalue_new(fvalue_t *fv)
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{
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fv->value.floating = 0.0;
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}
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static void
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double_fvalue_set_floating(fvalue_t *fv, gdouble value)
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{
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fv->value.floating = value;
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}
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static double
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value_get_floating(fvalue_t *fv)
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{
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return fv->value.floating;
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}
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static gboolean
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val_from_string(fvalue_t *fv, char *s, LogFunc logfunc)
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{
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char *endptr = NULL;
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fv->value.floating = strtod(s, &endptr);
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if (endptr == s || *endptr != '\0') {
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/* This isn't a valid number. */
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logfunc("\"%s\" is not a valid number.", s);
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return FALSE;
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}
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if (errno == ERANGE) {
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if (fv->value.floating == 0) {
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logfunc("\"%s\" causes floating-point underflow.", s);
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}
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else if (fv->value.floating == HUGE_VAL) {
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logfunc("\"%s\" causes floating-point overflow.", s);
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}
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else {
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logfunc("\"%s\" is not a valid floating-point number.",
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s);
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}
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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cmp_eq(fvalue_t *a, fvalue_t *b)
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{
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return a->value.floating == b->value.floating;
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}
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static gboolean
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cmp_ne(fvalue_t *a, fvalue_t *b)
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{
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return a->value.floating != b->value.floating;
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}
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static gboolean
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cmp_gt(fvalue_t *a, fvalue_t *b)
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{
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return a->value.floating > b->value.floating;
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}
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static gboolean
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cmp_ge(fvalue_t *a, fvalue_t *b)
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{
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return a->value.floating >= b->value.floating;
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}
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static gboolean
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cmp_lt(fvalue_t *a, fvalue_t *b)
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{
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return a->value.floating < b->value.floating;
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}
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static gboolean
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cmp_le(fvalue_t *a, fvalue_t *b)
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{
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return a->value.floating <= b->value.floating;
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}
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void
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ftype_register_double(void)
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{
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static ftype_t float_type = {
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"FT_FLOAT",
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"floating point (single-precision)",
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0,
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double_fvalue_new,
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NULL,
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val_from_string,
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NULL,
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NULL,
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double_fvalue_set_floating,
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NULL,
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NULL,
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value_get_floating,
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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NULL,
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NULL,
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};
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static ftype_t double_type = {
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"FT_DOUBLE",
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"floating point (double-precision)",
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0,
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double_fvalue_new,
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NULL,
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val_from_string,
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NULL,
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NULL,
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double_fvalue_set_floating,
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NULL,
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NULL,
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value_get_floating,
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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NULL,
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NULL,
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};
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ftype_register(FT_FLOAT, &float_type);
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ftype_register(FT_DOUBLE, &double_type);
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}
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