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