ftype-string.c

ethereal公司开发的aodv路由协议代码

/*
 * $Id: ftype-string.c,v 1.6 2002/03/02 20:48:13 guy Exp $
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <[e-mail]>
 * 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 <ftypes-int.h>
#include <string.h>

static void
string_fvalue_new(fvalue_t *fv)
{
	fv->value.string = NULL;
}

static void
string_fvalue_free(fvalue_t *fv)
{
	if (fv->value.string) {
		g_free(fv->value.string);
	}
}

static void
string_fvalue_set(fvalue_t *fv, gpointer value, gboolean already_copied)
{
	g_assert(value != NULL);
	if (already_copied) {
		fv->value.string = value;
	}
	else {
		fv->value.string = g_strdup(value);
	}
}

static gpointer
value_get(fvalue_t *fv)
{
	return fv->value.string;
}

static gboolean
val_from_string(fvalue_t *fv, char *s, LogFunc logfunc _U_)
{
	fv->value.string = g_strdup(s);
	return TRUE;
}

static guint
len(fvalue_t *fv)
{
	return strlen(fv->value.string);
}

static void
slice(fvalue_t *fv, GByteArray *bytes, guint offset, guint length)
{
	guint8* data;

	data = fv->value.string + offset;

	g_byte_array_append(bytes, data, length);
}


static gboolean
cmp_eq(fvalue_t *a, fvalue_t *b)
{
	return (strcmp(a->value.string, b->value.string) == 0);
}

static gboolean
cmp_ne(fvalue_t *a, fvalue_t *b)
{
	return (strcmp(a->value.string, b->value.string) != 0);
}

static gboolean
cmp_gt(fvalue_t *a, fvalue_t *b)
{
	return (strcmp(a->value.string, b->value.string) > 0);
}

static gboolean
cmp_ge(fvalue_t *a, fvalue_t *b)
{
	return (strcmp(a->value.string, b->value.string) >= 0);
}

static gboolean
cmp_lt(fvalue_t *a, fvalue_t *b)
{
	return (strcmp(a->value.string, b->value.string) < 0);
}

static gboolean
cmp_le(fvalue_t *a, fvalue_t *b)
{
	return (strcmp(a->value.string, b->value.string) <= 0);
}

void
ftype_register_string(void)
{

	static ftype_t string_type = {
		"FT_STRING",
		"character string",
		0,
		string_fvalue_new,
		string_fvalue_free,
		val_from_string,

		string_fvalue_set,
		NULL,
		NULL,

		value_get,
		NULL,
		NULL,

		cmp_eq,
		cmp_ne,
		cmp_gt,
		cmp_ge,
		cmp_lt,
		cmp_le,

		len,
		slice,
	};
	static ftype_t stringz_type = {
		"FT_STRINGZ",
		"character string",
		0,
		string_fvalue_new,
		string_fvalue_free,
		val_from_string,

		string_fvalue_set,
		NULL,
		NULL,

		value_get,
		NULL,
		NULL,

		cmp_eq,
		cmp_ne,
		cmp_gt,
		cmp_ge,
		cmp_lt,
		cmp_le,

		len,
		slice,
	};
	static ftype_t uint_string_type = {
		"FT_UINT_STRING",
		"character string",
		0,
		string_fvalue_new,
		string_fvalue_free,
		val_from_string,

		string_fvalue_set,
		NULL,
		NULL,

		value_get,
		NULL,
		NULL,

		cmp_eq,
		cmp_ne,
		cmp_gt,
		cmp_ge,
		cmp_lt,
		cmp_le,

		len,
		slice,
	};

	ftype_register(FT_STRING, &string_type);
	ftype_register(FT_STRINGZ, &stringz_type);
	ftype_register(FT_UINT_STRING, &uint_string_type);
}