/******************************************************************************
*
* Copyright (C) 2011-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#include "OverrideLog.h"
#include "config.h"
#include <stdio.h>
#include <string>
#include <vector>
#include <list>
#define LOG_TAG "NfcAdaptation"
const char alternative_config_path[] = "";
const char transport_config_path[] = "/etc/";
#define config_name "libnfc-brcm.conf"
#define extra_config_base "libnfc-brcm-"
#define extra_config_ext ".conf"
#define IsStringValue 0x80000000
using namespace::std;
class CNfcParam : public string
{
public:
CNfcParam();
CNfcParam(const char* name, const string& value);
CNfcParam(const char* name, unsigned long value);
virtual ~CNfcParam();
unsigned long numValue() const {return m_numValue;}
const char* str_value() const {return m_str_value.c_str();}
size_t str_len() const {return m_str_value.length();}
private:
string m_str_value;
unsigned long m_numValue;
};
class CNfcConfig : public vector<const CNfcParam*>
{
public:
virtual ~CNfcConfig();
static CNfcConfig& GetInstance();
friend void readOptionalConfig(const char* optional);
bool getValue(const char* name, char* pValue, size_t& len) const;
bool getValue(const char* name, unsigned long& rValue) const;
bool getValue(const char* name, unsigned short & rValue) const;
const CNfcParam* find(const char* p_name) const;
void clean();
private:
CNfcConfig();
bool readConfig(const char* name, bool bResetContent);
void moveFromList();
void moveToList();
void add(const CNfcParam* pParam);
list<const CNfcParam*> m_list;
bool mValidFile;
unsigned long state;
inline bool Is(unsigned long f) {return (state & f) == f;}
inline void Set(unsigned long f) {state |= f;}
inline void Reset(unsigned long f) {state &= ~f;}
};
/*******************************************************************************
**
** Function: isPrintable()
**
** Description: detremine if a char is printable
**
** Returns: none
**
*******************************************************************************/
inline bool isPrintable(char c)
{
return (c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z') ||
(c >= '0' && c <= '9') ||
c == '/' || c == '_' || c == '-' || c == '.';
}
/*******************************************************************************
**
** Function: isDigit()
**
** Description: detremine if a char is numeral digit
**
** Returns: none
**
*******************************************************************************/
inline bool isDigit(char c, int base)
{
if ('0' <= c && c <= '9')
return true;
if (base == 16)
{
if (('A' <= c && c <= 'F') ||
('a' <= c && c <= 'f') )
return true;
}
return false;
}
/*******************************************************************************
**
** Function: getDigitValue()
**
** Description: return numercal value of a char
**
** Returns: none
**
*******************************************************************************/
inline int getDigitValue(char c, int base)
{
if ('0' <= c && c <= '9')
return c - '0';
if (base == 16)
{
if ('A' <= c && c <= 'F')
return c - 'A' + 10;
else if ('a' <= c && c <= 'f')
return c - 'a' + 10;
}
return 0;
}
/*******************************************************************************
**
** Function: CNfcConfig::readConfig()
**
** Description: read Config settings and parse them into a linked list
** move the element from linked list to a array at the end
**
** Returns: none
**
*******************************************************************************/
bool CNfcConfig::readConfig(const char* name, bool bResetContent)
{
enum {
BEGIN_LINE = 1,
TOKEN,
STR_VALUE,
NUM_VALUE,
BEGIN_HEX,
BEGIN_QUOTE,
END_LINE
};
FILE* fd = NULL;
string token;
string strValue;
unsigned long numValue = 0;
CNfcParam* pParam = NULL;
int i = 0;
int base = 0;
char c = 0;
state = BEGIN_LINE;
/* open config file, read it into a buffer */
if ((fd = fopen(name, "rb")) == NULL)
{
ALOGD("%s Cannot open config file %s\n", __func__, name);
if (bResetContent)
{
ALOGD("%s Using default value for all settings\n", __func__);
mValidFile = false;
}
return false;
}
ALOGD("%s Opened %s config %s\n", __func__, (bResetContent ? "base" : "optional"), name);
mValidFile = true;
if (size() > 0)
{
if (bResetContent)
clean();
else
moveToList();
}
while (!feof(fd) && fread(&c, 1, 1, fd) == 1)
{
switch (state & 0xff)
{
case BEGIN_LINE:
if (c == '#')
state = END_LINE;
else if (isPrintable(c))
{
i = 0;
token.erase();
strValue.erase();
state = TOKEN;
token.push_back(c);
}
break;
case TOKEN:
if (c == '=')
{
token.push_back('\0');
state = BEGIN_QUOTE;
}
else if (isPrintable(c))
token.push_back(c);
else
state = END_LINE;
break;
case BEGIN_QUOTE:
if (c == '"')
{
state = STR_VALUE;
base = 0;
}
else if (c == '0')
state = BEGIN_HEX;
else if (isDigit(c, 10))
{
state = NUM_VALUE;
base = 10;
numValue = getDigitValue(c, base);
i = 0;
}
else if (c == '{')
{
state = NUM_VALUE;
base = 16;
i = 0;
Set(IsStringValue);
}
else
state = END_LINE;
break;
case BEGIN_HEX:
if (c == 'x' || c == 'X')
{
state = NUM_VALUE;
base = 16;
numValue = 0;
i = 0;
break;
}
else if (isDigit(c, 10))
{
state = NUM_VALUE;
base = 10;
numValue = getDigitValue(c, base);
break;
}
else if (c != '\n' && c != '\r')
{
state = END_LINE;
break;
}
// fal through to numValue to handle numValue
case NUM_VALUE:
if (isDigit(c, base))
{
numValue *= base;
numValue += getDigitValue(c, base);
++i;
}
else if (base == 16 && (c == ':' || c == '-' || c == ' ' || c == '}'))
{
if (i > 0)
{
int n = (i+1) / 2;
while (n-- > 0)
{
unsigned char c = (numValue >> (n * 8)) & 0xFF;
strValue.push_back(c);
}
}
Set(IsStringValue);
numValue = 0;
i = 0;
}
else
{
if (c == '\n' || c == '\r')
state = BEGIN_LINE;
else
state = END_LINE;
if (Is(IsStringValue) && base == 16 && i > 0)
{
int n = (i+1) / 2;
while (n-- > 0)
strValue.push_back(((numValue >> (n * 8)) & 0xFF));
}
if (strValue.length() > 0)
pParam = new CNfcParam(token.c_str(), strValue);
else
pParam = new CNfcParam(token.c_str(), numValue);
add(pParam);
strValue.erase();
numValue = 0;
}
break;
case STR_VALUE:
if (c == '"')
{
strValue.push_back('\0');
state = END_LINE;
pParam = new CNfcParam(token.c_str(), strValue);
add(pParam);
}
else if (isPrintable(c))
strValue.push_back(c);
break;
case END_LINE:
if (c == '\n' || c == '\r')
state = BEGIN_LINE;
break;
default:
break;
}
}
fclose(fd);
moveFromList();
return size() > 0;
}
/*******************************************************************************
**
** Function: CNfcConfig::CNfcConfig()
**
** Description: class constructor
**
** Returns: none
**
*******************************************************************************/
CNfcConfig::CNfcConfig() :
mValidFile(true)
{
}
/*******************************************************************************
**
** Function: CNfcConfig::~CNfcConfig()
**
** Description: class destructor
**
** Returns: none
**
*******************************************************************************/
CNfcConfig::~CNfcConfig()
{
}
/*******************************************************************************
**
** Function: CNfcConfig::GetInstance()
**
** Description: get class singleton object
**
** Returns: none
**
*******************************************************************************/
CNfcConfig& CNfcConfig::GetInstance()
{
static CNfcConfig theInstance;
if (theInstance.size() == 0 && theInstance.mValidFile)
{
string strPath;
if (alternative_config_path[0] != '\0')
{
strPath.assign(alternative_config_path);
strPath += config_name;
theInstance.readConfig(strPath.c_str(), true);
if (!theInstance.empty())
{
return theInstance;
}
}
strPath.assign(transport_config_path);
strPath += config_name;
theInstance.readConfig(strPath.c_str(), true);
}
return theInstance;
}
/*******************************************************************************
**
** Function: CNfcConfig::getValue()
**
** Description: get a string value of a setting
**
** Returns: true if setting exists
** false if setting does not exist
**
*******************************************************************************/
bool CNfcConfig::getValue(const char* name, char* pValue, size_t& len) const
{
const CNfcParam* pParam = find(name);
if (pParam == NULL)
return false;
if (pParam->str_len() > 0)
{
memset(pValue, 0, len);
if (len > pParam->str_len())
len = pParam->str_len();
memcpy(pValue, pParam->str_value(), len);
return true;
}
return false;
}
/*******************************************************************************
**
** Function: CNfcConfig::getValue()
**
** Description: get a long numerical value of a setting
**
** Returns: true if setting exists
** false if setting does not exist
**
*******************************************************************************/
bool CNfcConfig::getValue(const char* name, unsigned long& rValue) const
{
const CNfcParam* pParam = find(name);
if (pParam == NULL)
return false;
if (pParam->str_len() == 0)
{
rValue = static_cast<unsigned long>(pParam->numValue());
return true;
}
return false;
}
/*******************************************************************************
**
** Function: CNfcConfig::getValue()
**
** Description: get a short numerical value of a setting
**
** Returns: true if setting exists
** false if setting does not exist
**
*******************************************************************************/
bool CNfcConfig::getValue(const char* name, unsigned short& rValue) const
{
const CNfcParam* pParam = find(name);
if (pParam == NULL)
return false;
if (pParam->str_len() == 0)
{
rValue = static_cast<unsigned short>(pParam->numValue());
return true;
}
return false;
}
/*******************************************************************************
**
** Function: CNfcConfig::find()
**
** Description: search if a setting exist in the setting array
**
** Returns: pointer to the setting object
**
*******************************************************************************/
const CNfcParam* CNfcConfig::find(const char* p_name) const
{
if (size() == 0)
return NULL;
for (const_iterator it = begin(), itEnd = end(); it != itEnd; ++it)
{
if (**it < p_name)
continue;
else if (**it == p_name)
{
if((*it)->str_len() > 0)
ALOGD("%s found %s=%s\n", __func__, p_name, (*it)->str_value());
else
ALOGD("%s found %s=(0x%lX)\n", __func__, p_name, (*it)->numValue());
return *it;
}
else
break;
}
return NULL;
}
/*******************************************************************************
**
** Function: CNfcConfig::clean()
**
** Description: reset the setting array
**
** Returns: none
**
*******************************************************************************/
void CNfcConfig::clean()
{
if (size() == 0)
return;
for (iterator it = begin(), itEnd = end(); it != itEnd; ++it)
delete *it;
clear();
}
/*******************************************************************************
**
** Function: CNfcConfig::Add()
**
** Description: add a setting object to the list
**
** Returns: none
**
*******************************************************************************/
void CNfcConfig::add(const CNfcParam* pParam)
{
if (m_list.size() == 0)
{
m_list.push_back(pParam);
return;
}
for (list<const CNfcParam*>::iterator it = m_list.begin(), itEnd = m_list.end(); it != itEnd; ++it)
{
if (**it < pParam->c_str())
continue;
m_list.insert(it, pParam);
return;
}
m_list.push_back(pParam);
}
/*******************************************************************************
**
** Function: CNfcConfig::moveFromList()
**
** Description: move the setting object from list to array
**
** Returns: none
**
*******************************************************************************/
void CNfcConfig::moveFromList()
{
if (m_list.size() == 0)
return;
for (list<const CNfcParam*>::iterator it = m_list.begin(), itEnd = m_list.end(); it != itEnd; ++it)
push_back(*it);
m_list.clear();
}
/*******************************************************************************
**
** Function: CNfcConfig::moveToList()
**
** Description: move the setting object from array to list
**
** Returns: none
**
*******************************************************************************/
void CNfcConfig::moveToList()
{
if (m_list.size() != 0)
m_list.clear();
for (iterator it = begin(), itEnd = end(); it != itEnd; ++it)
m_list.push_back(*it);
clear();
}
/*******************************************************************************
**
** Function: CNfcParam::CNfcParam()
**
** Description: class constructor
**
** Returns: none
**
*******************************************************************************/
CNfcParam::CNfcParam() :
m_numValue(0)
{
}
/*******************************************************************************
**
** Function: CNfcParam::~CNfcParam()
**
** Description: class destructor
**
** Returns: none
**
*******************************************************************************/
CNfcParam::~CNfcParam()
{
}
/*******************************************************************************
**
** Function: CNfcParam::CNfcParam()
**
** Description: class copy constructor
**
** Returns: none
**
*******************************************************************************/
CNfcParam::CNfcParam(const char* name, const string& value) :
string(name),
m_str_value(value),
m_numValue(0)
{
}
/*******************************************************************************
**
** Function: CNfcParam::CNfcParam()
**
** Description: class copy constructor
**
** Returns: none
**
*******************************************************************************/
CNfcParam::CNfcParam(const char* name, unsigned long value) :
string(name),
m_numValue(value)
{
}
/*******************************************************************************
**
** Function: GetStrValue
**
** Description: API function for getting a string value of a setting
**
** Returns: none
**
*******************************************************************************/
extern "C" int GetStrValue(const char* name, char* pValue, unsigned long l)
{
size_t len = l;
CNfcConfig& rConfig = CNfcConfig::GetInstance();
bool b = rConfig.getValue(name, pValue, len);
return b ? len : 0;
}
/*******************************************************************************
**
** Function: GetNumValue
**
** Description: API function for getting a numerical value of a setting
**
** Returns: none
**
*******************************************************************************/
extern "C" int GetNumValue(const char* name, void* pValue, unsigned long len)
{
if (!pValue)
return false;
CNfcConfig& rConfig = CNfcConfig::GetInstance();
const CNfcParam* pParam = rConfig.find(name);
if (pParam == NULL)
return false;
unsigned long v = pParam->numValue();
if (v == 0 && pParam->str_len() > 0 && pParam->str_len() < 4)
{
const unsigned char* p = (const unsigned char*)pParam->str_value();
for (size_t i = 0 ; i < pParam->str_len(); ++i)
{
v *= 256;
v += *p++;
}
}
switch (len)
{
case sizeof(unsigned long):
*(static_cast<unsigned long*>(pValue)) = (unsigned long)v;
break;
case sizeof(unsigned short):
*(static_cast<unsigned short*>(pValue)) = (unsigned short)v;
break;
case sizeof(unsigned char):
*(static_cast<unsigned char*> (pValue)) = (unsigned char)v;
break;
default:
return false;
}
return true;
}
/*******************************************************************************
**
** Function: resetConfig
**
** Description: reset settings array
**
** Returns: none
**
*******************************************************************************/
extern void resetConfig()
{
CNfcConfig& rConfig = CNfcConfig::GetInstance();
rConfig.clean();
}
/*******************************************************************************
**
** Function: readOptionalConfig()
**
** Description: read Config settings from an optional conf file
**
** Returns: none
**
*******************************************************************************/
void readOptionalConfig(const char* extra)
{
string strPath;
strPath.assign(transport_config_path);
if (alternative_config_path[0] != '\0')
strPath.assign(alternative_config_path);
strPath += extra_config_base;
strPath += extra;
strPath += extra_config_ext;
CNfcConfig::GetInstance().readConfig(strPath.c_str(), false);
}