2001-02-01 20:31:21 +00:00
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/*
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* $Id: sttype-range.c,v 1.2 2001/02/01 20:31:18 gram Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 2001 Gerald Combs
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*
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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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2001-02-01 20:21:25 +00:00
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/* The ideas in this code came from Ed Warnicke's original implementation
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* of dranges for the old display filter code (Ethereal 0.8.15 and before).
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* The code is different, but definitely inspired by his code.
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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 <stdlib.h>
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#include <errno.h>
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#include "proto.h"
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#include "sttype-range.h"
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typedef struct {
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guint32 magic;
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header_field_info *hfinfo;
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gint start;
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gint end;
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char *start_error;
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char *end_error;
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} range_t;
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#define RANGE_MAGIC 0xec0990ce
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static gpointer
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range_new(gpointer junk)
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{
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range_t *range;
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g_assert(junk == NULL);
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range = g_new(range_t, 1);
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range->magic = RANGE_MAGIC;
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range->hfinfo = NULL;
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range->start = 0;
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range->end = -1;
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range->start_error = NULL;
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range->end_error = NULL;
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return (gpointer) range;
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}
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static void
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range_free(gpointer value)
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{
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range_t *range = value;
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assert_magic(range, RANGE_MAGIC);
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if (range->start_error)
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g_free(range->start_error);
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if (range->end_error)
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g_free(range->end_error);
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g_free(range);
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}
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static gint
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string_to_gint(char *s, gboolean *success)
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{
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char *endptr;
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gint val;
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*success = TRUE;
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val = strtol(s, &endptr, 0);
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if (endptr == s || *endptr != '\0') {
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*success = FALSE;
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}
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else if (errno == ERANGE) {
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*success = FALSE;
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}
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return val;
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}
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static void
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range_set(stnode_t *node, stnode_t *field, char *start, char *end)
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{
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range_t *range;
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gboolean success;
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range = stnode_data(node);
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assert_magic(range, RANGE_MAGIC);
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range->hfinfo = stnode_data(field);
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stnode_free(field);
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if (start) {
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range->start = string_to_gint(start, &success);
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if (!success) {
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/* Save the error-causing string for later reporting */
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range->start_error = g_strdup(start);
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}
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}
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else {
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range->start = 0;
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}
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if (end) {
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range->end = string_to_gint(end, &success);
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if (!success) {
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/* Save the error-causing string for later reporting */
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range->end_error = g_strdup(end);
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}
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}
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else {
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range->end = G_MAXINT;
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}
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}
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void
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sttype_range_set(stnode_t *node, stnode_t *field, stnode_t *start, stnode_t *end)
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{
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char *start_str, *end_str;
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if (start) {
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start_str = stnode_data(start);
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}
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else {
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start_str = NULL;
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}
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if (end) {
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end_str = stnode_data(end);
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}
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else {
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end_str = NULL;
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}
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range_set(node, field, start_str, end_str);
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if (start)
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stnode_free(start);
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if (end)
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stnode_free(end);
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}
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void
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sttype_range_set1(stnode_t *node, stnode_t *field, stnode_t *offset)
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{
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char *offset_str;
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g_assert(offset);
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offset_str = stnode_data(offset);
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range_set(node, field, offset_str, "1");
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stnode_free(offset);
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}
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STTYPE_ACCESSOR(header_field_info*, range, hfinfo, RANGE_MAGIC)
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STTYPE_ACCESSOR(gint, range, start, RANGE_MAGIC)
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STTYPE_ACCESSOR(gint, range, end, RANGE_MAGIC)
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STTYPE_ACCESSOR(char*, range, start_error, RANGE_MAGIC)
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STTYPE_ACCESSOR(char*, range, end_error, RANGE_MAGIC)
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void
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sttype_register_range(void)
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{
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static sttype_t range_type = {
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STTYPE_RANGE,
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"RANGE",
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range_new,
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range_free,
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};
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sttype_register(&range_type);
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}
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