tox-weechat/src/twc-utils.c
2014-10-05 05:22:59 +02:00

169 lines
3.9 KiB
C

/*
* Copyright (c) 2014 Håvard Pettersson <haavard.pettersson@gmail.com>
*
* This file is part of Tox-WeeChat.
*
* Tox-WeeChat 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 3 of the License, or
* (at your option) any later version.
*
* Tox-WeeChat 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 Tox-WeeChat. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <stdio.h>
#include <weechat/weechat-plugin.h>
#include <tox/tox.h>
#include "twc-utils.h"
/**
* Convert a hex string to it's binary equivalent of max size bytes.
*/
void
twc_hex2bin(const char *hex, size_t size, char *out)
{
const char *position = hex;
size_t i;
for (i = 0; i < size; ++i)
{
sscanf(position, "%2hhx", &out[i]);
position += 2;
}
}
/**
* Convert size bytes to a hex string. out must be at lesat size * 2 + 1
* bytes.
*/
void
twc_bin2hex(const uint8_t *bin, size_t size, char *out)
{
char *position = out;
size_t i;
for (i = 0; i < size; ++i)
{
sprintf(position, "%02X", bin[i]);
position += 2;
}
*position = 0;
}
/**
* Return a null-terminated copy of str. Must be freed.
*/
char *
twc_null_terminate(const uint8_t *str, size_t length)
{
char *str_null = malloc(length + 1);
memcpy(str_null, str, length);
str_null[length] = 0;
return str_null;
}
/**
* Get the null-terminated name of a Tox friend. Must be freed.
*/
char *
twc_get_name_nt(Tox *tox, int32_t friend_number)
{
size_t length = tox_get_name_size(tox, friend_number);
uint8_t name[length];
// if no name, return client ID instead
if (!length)
return twc_get_friend_id_short(tox, friend_number);
tox_get_name(tox, friend_number, name);
return twc_null_terminate(name, length);
}
/**
* Return the null-terminated status message of a Tox friend. Must be freed.
*/
char *
twc_get_status_message_nt(Tox *tox, int32_t friend_number)
{
size_t length = tox_get_status_message_size(tox, friend_number);
uint8_t message[length];
tox_get_status_message(tox, friend_number, message, length);
return twc_null_terminate(message, length);
}
/**
* Return the name of a group chat peer as a null terminated string. Must be
* freed.
*/
char *
twc_get_peer_name_nt(Tox *tox, int32_t group_number, int32_t peer_number)
{
uint8_t name[TOX_MAX_NAME_LENGTH] = {0};
int length = tox_group_peername(tox, group_number, peer_number, name);
if (length >= 0)
return twc_null_terminate(name, length);
else
return "<unknown>";
}
/**
* Return the users own name, null-terminated. Must be freed.
*/
char *
twc_get_self_name_nt(Tox *tox)
{
size_t length = tox_get_self_name_size(tox);
uint8_t name[length];
tox_get_self_name(tox, name);
return twc_null_terminate(name, length);
}
/**
* Return a friend's Tox ID in short form. Return value must be freed.
*/
char *
twc_get_friend_id_short(Tox *tox, int32_t friend_number)
{
uint8_t client_id[TOX_CLIENT_ID_SIZE];
tox_get_client_id(tox, friend_number, client_id);
// TODO: config
size_t short_id_length = 8;
char *hex_address = malloc(short_id_length + 1);
twc_bin2hex(client_id,
short_id_length / 2,
hex_address);
return hex_address;
}
/**
* Reverse the bytes of a 32-bit integer.
*/
uint32_t
twc_uint32_reverse_bytes(uint32_t num)
{
uint32_t res = 0;
res += num & 0xFF; num >>= 8; res <<= 8;
res += num & 0xFF; num >>= 8; res <<= 8;
res += num & 0xFF; num >>= 8; res <<= 8;
res += num & 0xFF;
return res;
}