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/*
* This file is part of oFono - Open Source Telephony
*
* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
*
* Contact: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdint.h>
#include <string.h>
#include <glib.h>
#include <arpa/inet.h>
#include "iter.h"
static inline void bcd_to_mccmnc(const uint8_t *restrict bcd,
char *mcc, char *mnc)
{
mcc[0] = '0' + (bcd[0] & 0x0F);
mcc[1] = '0' + ((bcd[0] & 0xF0) >> 4);
mcc[2] = '0' + (bcd[1] & 0x0F);
mcc[3] = '\0';
mnc[0] = '0' + (bcd[2] & 0x0F);
mnc[1] = '0' + ((bcd[2] & 0xF0) >> 4);
mnc[2] = (bcd[1] & 0xF0) == 0xF0 ? '\0' : '0' +
(bcd[1] & 0xF0);
mnc[3] = '\0';
}
void g_isi_sb_iter_init_full(GIsiSubBlockIter *iter, const void *restrict data,
size_t len, size_t used, gboolean longhdr,
uint16_t sub_blocks)
{
if (!data)
len = used = 0;
iter->start = (uint8_t *)data + used;
iter->end = iter->start + len;
iter->longhdr = longhdr;
iter->sub_blocks = len > used ? sub_blocks : 0;
}
void g_isi_sb_iter_init(GIsiSubBlockIter *iter, const void *restrict data,
size_t len, size_t used)
{
if (!data)
len = used = 0;
iter->start = (uint8_t *)data + used;
iter->end = iter->start + len;
iter->longhdr = FALSE;
iter->sub_blocks = len > used ? iter->start[-1] : 0;
}
gboolean g_isi_sb_iter_is_valid(const GIsiSubBlockIter *iter)
{
if (!iter)
return FALSE;
if (iter->sub_blocks == 0)
return FALSE;
if (iter->start + (iter->longhdr ? 4 : 2) > iter->end)
return FALSE;
if (iter->start + g_isi_sb_iter_get_len(iter) > iter->end)
return FALSE;
return TRUE;
}
int g_isi_sb_iter_get_id(const GIsiSubBlockIter *iter)
{
if (iter->longhdr)
return (iter->start[0] << 8) | (iter->start[1]);
return iter->start[0];
}
size_t g_isi_sb_iter_get_len(const GIsiSubBlockIter *iter)
{
if (iter->longhdr)
return (iter->start[2] << 8) | (iter->start[3]);
return iter->start[1];
}
gboolean g_isi_sb_iter_get_data(const GIsiSubBlockIter *restrict iter,
void **data, unsigned pos)
{
if ((size_t)pos > g_isi_sb_iter_get_len(iter)
|| iter->start + pos > iter->end)
return FALSE;
*data = (void *)iter->start + pos;
return TRUE;
}
gboolean g_isi_sb_iter_get_byte(const GIsiSubBlockIter *restrict iter,
uint8_t *byte, unsigned pos)
{
if ((size_t)pos > g_isi_sb_iter_get_len(iter)
|| iter->start + pos > iter->end)
return FALSE;
*byte = iter->start[pos];
return TRUE;
}
gboolean g_isi_sb_iter_get_word(const GIsiSubBlockIter *restrict iter,
uint16_t *word, unsigned pos)
{
uint16_t val;
if (pos + 1 > g_isi_sb_iter_get_len(iter))
return FALSE;
memcpy(&val, iter->start + pos, sizeof(uint16_t));
*word = ntohs(val);
return TRUE;
}
gboolean g_isi_sb_iter_get_dword(const GIsiSubBlockIter *restrict iter,
uint32_t *dword, unsigned pos)
{
uint32_t val;
if (pos + 3 > g_isi_sb_iter_get_len(iter))
return FALSE;
memcpy(&val, iter->start + pos, sizeof(uint32_t));
*dword = ntohl(val);
return TRUE;
}
gboolean g_isi_sb_iter_get_oper_code(const GIsiSubBlockIter *restrict iter,
char *mcc, char *mnc, unsigned pos)
{
if (pos + 2 > g_isi_sb_iter_get_len(iter))
return FALSE;
bcd_to_mccmnc(iter->start + pos, mcc, mnc);
return TRUE;
}
gboolean g_isi_sb_iter_get_alpha_tag(const GIsiSubBlockIter *restrict iter,
char **utf8, size_t len, unsigned pos)
{
uint8_t *ucs2 = NULL;
if (pos > g_isi_sb_iter_get_len(iter))
return FALSE;
if (!utf8 || len == 0 || pos + len > g_isi_sb_iter_get_len(iter))
return FALSE;
ucs2 = iter->start + pos;
if (ucs2 + len > iter->end)
return FALSE;
*utf8 = g_convert((const char *)ucs2, len, "UTF-8//TRANSLIT", "UCS-2BE",
NULL, NULL, NULL);
return *utf8 != NULL;
}
gboolean g_isi_sb_iter_get_latin_tag(const GIsiSubBlockIter *restrict iter,
char **latin, size_t len, unsigned pos)
{
uint8_t *str = NULL;
if (pos > g_isi_sb_iter_get_len(iter))
return FALSE;
if (!latin || len == 0 || pos + len > g_isi_sb_iter_get_len(iter))
return FALSE;
str = iter->start + pos;
if (str + len > iter->end)
return FALSE;
*latin = g_strndup((char *)str, len);
return *latin != NULL;
}
gboolean g_isi_sb_iter_next(GIsiSubBlockIter *iter)
{
uint8_t len = g_isi_sb_iter_get_len(iter);
if (len == 0)
len = iter->longhdr ? 4 : 2;
if (iter->sub_blocks == 0)
return FALSE;
if (iter->start + len > iter->end)
return FALSE;
iter->start += len;
iter->sub_blocks--;
return TRUE;
}
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