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/.vscode/* |
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#ifndef __LORA_SOCKET_H__ |
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#define __LORA_SOCKET_H__ |
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#include <LoRa.h> |
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#include "vector.h" |
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#ifndef LORA_SOCKET_IP |
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#define LORA_SOCKET_IP "0.0.0.0" |
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#endif |
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#ifndef MAX_RECEIVE_STACK_SIZE |
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#define MAX_RECEIVE_STACK_SIZE 5 |
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#endif |
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#ifndef MAX_SEND_STACK_SIZE |
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#define MAX_SEND_STACK_SIZE 5 |
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#endif |
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#ifndef MAX_TCP_TRY_TIMES |
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#define MAX_TCP_TRY_TIMES 8 |
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#endif |
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class LoRaSocket { |
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public: |
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LoRaSocket(){} |
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static void core(); |
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static void ini(); |
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static void udp(const String& msg, const String& to = "0.0.0.0"); |
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static void tcp(const String& msg, const String& to); |
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static void rtcp(const String& msg); |
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static void onReceived(const String& msg, const String& from, const String& to, const String& type){ |
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}; |
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private: |
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static Vector<String> tcp_sendingStack, tcp_receiveStack; |
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static Vector<unsigned int> tcp_sendingTryTimes; |
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/* LoRa Functions */ |
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static void LoRa_tx_mode(); |
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static void LoRa_rx_mode(); |
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static void send(const String& s); |
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static const String& receiveMsg(); |
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/* Package Functions */ |
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inline static const String& getIPHeader(const String& to = "0.0.0.0"){ |
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return to + "|" + LORA_SOCKET_IP + "|"; |
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}; |
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inline static bool isGoodPackage(const String& s){ |
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String body = s.substring(0, s.length() - 1); |
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if(s.substring(s.length() - 1, s.length()) != hash(body)){ |
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return false; |
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} |
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return true; |
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}; |
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inline static const String& getToIP(const String& s){ |
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unsigned short left = s.indexOf('|'); |
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unsigned short right = s.indexOf('|', left + 1); |
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return s.substring(left, right - 1); |
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}; |
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inline static const String& getFromIP(const String& s){ |
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unsigned short left = s.indexOf('|', s.indexOf('|') + 1); |
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unsigned short right = s.indexOf('|', left + 1); |
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return s.substring(left, right - 1); |
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}; |
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inline static const String& getType(const String& s){ |
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return s.substring(0, s.indexOf('|') - 1); |
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}; |
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inline static const String& getContent(const String& s){ |
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unsigned short left = s.indexOf('|', s.indexOf('|', s.indexOf('|') + 1) + 1); |
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unsigned short right = s.indexOf('|', left + 1); |
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return decode(s.substring(left, right - 1)); |
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}; |
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inline static const String& getTcpKey(const String& s){ |
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unsigned short left = s.indexOf('|', s.indexOf('|', s.indexOf('|', s.indexOf('|') + 1) + 1) + 1); |
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unsigned short right = s.indexOf('|', left + 1); |
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return decode(s.substring(left, right - 1)); |
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}; |
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/* receive Functions */ |
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static void getMsg(const String& msg); |
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/* tcp stack functions */ |
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static void checkSendStack(){ |
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for(unsigned int i = 0; i < tcp_sendingStack.Size(); i ++){ |
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send(tcp_sendingStack[i]); |
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tcp_sendingTryTimes[i] += 1; |
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if(tcp_sendingTryTimes[i] >= MAX_TCP_TRY_TIMES){ |
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tcp_sendingStack.Erase(i); |
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tcp_sendingTryTimes.Erase(i); |
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} |
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} |
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}; |
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inline static void receiveStackClassify(){ |
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if(tcp_receiveStack.Size() > MAX_RECEIVE_STACK_SIZE) tcp_receiveStack.Erase(0); |
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}; |
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inline static void sendStackClassify(){ |
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if(tcp_sendingStack.Size() > MAX_SEND_STACK_SIZE) { |
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tcp_sendingStack.Erase(0); |
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tcp_sendingTryTimes.Erase(0); |
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} |
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}; |
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static void removeByKey(const String& key); |
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/* tools */ |
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static const String& hash(const String& s); |
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static const String& encode(const String& s){ |
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return s; |
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}; |
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static const String& decode(const String& s){ |
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return s; |
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} |
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static const String& generateRandomKey(){ |
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String o = ""; |
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for(unsigned short i = 0; i < 4; i ++){ |
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o += char(LoRa.random() % 26 + 97); |
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} |
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return o; |
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} |
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/* timer */ |
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static void setInterval(void (*function)(void), const int delay){ |
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static unsigned long startTime = millis();
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if(millis() - startTime > delay){ |
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(*function)(); |
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startTime = millis(); |
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} |
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} |
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}; |
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void LoRaSocket::getMsg(const String& msg){ |
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if(!isGoodPackage(msg)) return; |
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if(getToIP(msg) != LORA_SOCKET_IP && getToIP(msg) != "0.0.0.0") return; |
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if(getType(msg) == "udp") onReceived(getContent(msg), getFromIP(msg), getToIP(msg), "udp"); |
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if(getType(msg) == "tcp"){ |
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if(tcp_receiveStack.Find(msg) != -1) return; |
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onReceived(getContent(msg), getFromIP(msg), getToIP(msg), "tcp"); |
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rtcp(msg); |
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receiveStackClassify(); |
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} |
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if(getType(msg) == "rtcp"){ |
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removeByKey(getContent(msg)); |
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} |
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} |
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void LoRaSocket::udp(const String& msg, const String& to){ |
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String fin = "udp|" + getIPHeader(to) + encode(msg) + "|"; |
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fin += hash(fin); |
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send(fin); |
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}; |
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void LoRaSocket::tcp(const String& msg, const String& to){ |
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String fin = "tcp|" + getIPHeader(to) + encode(msg) + "|" + generateRandomKey() + "|"; |
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fin += hash(fin); |
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tcp_sendingStack.PushBack(fin); |
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tcp_sendingTryTimes.PushBack(0); |
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sendStackClassify(); |
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send(fin); |
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}; |
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void LoRaSocket::rtcp(const String& msg){ |
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tcp_receiveStack.PushBack(msg); |
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String fin = "rtcp|" + getIPHeader(getFromIP(msg)) + getTcpKey(msg) + "|"; |
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fin += hash(fin); |
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send(fin); |
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} |
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Vector<String> LoRaSocket::tcp_sendingStack, LoRaSocket::tcp_receiveStack; |
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Vector<unsigned int> LoRaSocket::tcp_sendingTryTimes; |
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void LoRaSocket::ini() { |
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} |
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void LoRaSocket::core() { |
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/* Listen Msg */ |
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if(LoRa.parsePacket()){ |
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getMsg(receiveMsg()); |
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} |
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/* check tcp stack */ |
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setInterval(checkSendStack, 1000); |
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} |
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void LoRaSocket::LoRa_tx_mode(){ |
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LoRa.idle(); |
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} |
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void LoRaSocket::LoRa_rx_mode(){ |
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LoRa.receive(); |
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} |
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void LoRaSocket::send(const String& s){ |
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LoRa_tx_mode(); |
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delay(200); |
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LoRa.beginPacket(); |
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LoRa.print(s); |
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LoRa.endPacket(); |
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delay(200); |
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LoRa_rx_mode(); |
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} |
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const String& LoRaSocket::receiveMsg(){ |
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String s = ""; |
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while (LoRa.available()) { |
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s += (char)LoRa.read(); |
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} |
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return s; |
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} |
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const String& LoRaSocket::hash(const String& s){ |
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unsigned char hashVal = 'k'; |
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for(unsigned short i = 0; i < s.length(); i ++){ |
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hashVal ^= s.charAt(i); |
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} |
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hashVal = hashVal % 26 + 97; |
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return String(hashVal); |
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} |
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void LoRaSocket::removeByKey(const String& key){ |
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for(unsigned int i = 0; i < tcp_sendingStack.Size(); i++){ |
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if(getTcpKey(tcp_sendingStack[i]) == key) { |
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tcp_sendingStack.Erase(i); |
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return; |
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} |
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} |
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} |
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#endif //__LORA_SOCKET_H__
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#include <LoRa.h> |
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#define LORA_SOCKET_IP "2.2.2.1" |
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#include "lora-socket.h" |
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LoRaSocket socket; |
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void setup(){ |
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socket.ini(); |
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socket.tcp("lalalla", "10.2.3.1"); |
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socket.udp("ll"); |
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} |
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void loop(){ |
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socket.core(); |
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} |
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/*
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* Vector.h |
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* |
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* Created on: 05/04/2012 |
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* Author: tom |
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* Purpose: To play the part of a mutable array in the absence of the STL. |
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*/ |
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#ifndef VECTOR_H |
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#define VECTOR_H |
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#include <stdint.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#ifndef MIN |
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#define MIN(a, b) (((a) < (b)) ? (a) : (b)) |
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#endif |
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#ifndef MAX |
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#define MAX(a, b) (((a) > (b)) ? (a) : (b)) |
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#endif |
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#define SWAP(type, a, b) type tmp ## a = a; a = b; b = tmp ## a; |
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template <class ParameterType> class Predicate |
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{ |
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public: |
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virtual void operator() (ParameterType ¶m) = 0; |
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}; |
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template <class VectorType> class Vector |
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{ |
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// The address of the first element of the vector
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VectorType *begin; |
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// The address one after the last allocated entry in the underlying array
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VectorType *storage; |
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// The index of the most recent element put in the underlying array - the head
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int head; |
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public: |
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// The value that is returned when the caller asks for an element that is out of the bounds of the vector
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VectorType OB; |
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// We can save a few re-sizings if we know how large the array is likely to grow to be
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Vector(int initialSize = 0) |
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{ |
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begin = new VectorType[initialSize]; //points to the beginning of the new array
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head = initialSize - 1; |
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storage = begin + initialSize; //points to the element one outside of the array (such that end - begin = capacity)
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} |
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Vector(Vector &obj) |
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{ |
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begin = new VectorType[0]; // Points to the beginning of the new array, it's zero but this line keeps malloc from seg faulting should we delete begin before resizing it
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head = -1; |
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storage = begin; //points to the element one outside of the array (such that end - begin = capacity)
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*this = obj; |
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} |
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// If there's anything in the vector then delete the array, if there's no array then doing will will cause seg faults
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virtual ~Vector() { delete[] begin; } |
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Vector &operator=(Vector &obj) |
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{ |
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// Reallocate the underlying buffer to the same size as the
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Resize(obj.Size()); |
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for(int i = 0; i < obj.Size(); i++) |
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(*this)[i] = obj[i]; |
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head = obj.head; |
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return *this; |
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} |
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void ForEach(Predicate<VectorType> &functor) |
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{ |
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for(int i = 0; i < Size(); i++) |
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functor(begin[i]); |
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} |
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// Swaps the underlying array and characteristics of this vector with another of the same type, very quickly
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void Swap(Vector &obj) |
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{ |
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SWAP(int, head, obj.head); |
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SWAP(VectorType*, begin, obj.begin); |
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SWAP(VectorType*, storage, obj.storage); |
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} |
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// Checks the entire Vector to see whether a matching item exists. Bear in mind that the VectorType might need to implement
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// equality operator (operator==) for this to work properly.
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bool Contains(VectorType element) |
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{ |
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for(int i = 0; i < Size(); i++) |
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if(operator [](i) == element) |
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return true; |
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return false; |
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} |
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int Find(VectorType element) |
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{ |
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for(int i = 0; i < Size(); i++) |
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if(operator [](i) == element) |
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return i; |
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return -1; |
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} |
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void PushBack(VectorType element) { PushBack(&element, 1); } |
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void PushBack(const VectorType *elements, int len) |
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{ |
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// If the length plus this's size is greater than the capacity, reallocate to that size.
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if(len + Size() > Capacity()) |
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ReAllocate(MAX(Size() + len, Size() * 2)); |
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int append = MIN(storage - begin - head - 1, len), prepend = len - append; |
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// memcpy the data starting at the head all the way up to the last element *(storage - 1)
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memcpy((begin + head + 1), elements, sizeof(VectorType) * append); |
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// If there's still data to copy memcpy whatever remains, starting at the first element *(begin) until the end of data. The first step will have ensured
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// that we don't crash into the tail during this process.
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memcpy(begin,(elements + append), sizeof(VectorType) * prepend); |
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// Re-recalculate head and size.
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head += len; |
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} |
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void Erase(unsigned int position) { Erase(position, position + 1); } |
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// Erase an arbitrary section of the vector from first up to last minus one. Like the stl counterpart, this is pretty labour intensive so go easy on it.
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void Erase(int first, int last) |
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{ |
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// For this we'll set the value of the array at first to the value of the array at last plus one. We'll do that all the way up to toIndex
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for(int i = 0; i < (Size() - first); i++) |
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{ |
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// If by trying to fill in the next element with the ones ahead of it we'll be running off the end of the vector, stop.
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if((i + last) > (Size() - 1)) |
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break; |
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begin[first + i] = begin[last + i]; |
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} |
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// Adjust the head to reflect the new size
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head -= last - first; |
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} |
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// Remove the most recent element in the array
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void PopBack() |
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{ |
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if(Size() > 0) |
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head--; |
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} |
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// Empty the vector, or to be precise - forget the fact that there was ever anything in there.
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void Clear() { head = -1; } |
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// Returns a bool indicating whether or not there are any elements in the array
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bool Empty() { return head == -1; } |
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// Returns the oldest element in the array (the one added before any other)
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VectorType const &Back() { return *begin; } |
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// Returns the newest element in the array (the one added after every other)
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VectorType const &Front() { return begin[head]; } |
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// Returns the nth element in the vector
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VectorType &operator[](int n) |
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{ |
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if(n < Size()) |
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return begin[n]; |
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else |
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return OB; |
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} |
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// Returns a pointer such that the vector's data is laid out between ret to ret + size
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VectorType *Data() { return begin; } |
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// Recreates the vector to hold len elements, all being copies of val
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void Assign(int len, const VectorType &val) |
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{ |
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delete[] begin; |
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// Allocate an array the same size as the one passed in
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begin = new VectorType[len]; |
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storage = begin + len; |
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// Refresh the head and tail, assuming the array is in order, which it really has to be
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head = len - 1; |
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for(int i = 0 ; i < Size(); i++) |
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begin[i] = val; |
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} |
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// Recreates the vector using an external array
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void Assign(VectorType *array, int len) |
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{ |
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delete[] begin; |
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// Allocate an array the same size as the one passed in
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begin = new VectorType[len]; |
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storage = begin + len; |
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// Refresh the head and tail, assuming the array is in order, which it really has to be
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head = len - 1; |
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// Copy over the memory
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memcpy(begin, array, sizeof(VectorType) * len); |
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} |
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// Returns the number of elements that the vector will support before needing resizing
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int Capacity() { return (storage - begin); } |
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// Returns the number of elements in vector
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int Size() { return head + 1; } |
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// Requests that the capacity of the allocated storage space for the elements
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// of the vector be at least enough to hold size elements.
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void Reserve(unsigned int size) |
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{ |
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if(size > Capacity()) |
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ReAllocate(size); |
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} |
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// Resizes the vector
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void Resize(unsigned int size) |
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{ |
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// If necessary, resize the underlying array to fit the new size
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if(size > Capacity()) |
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ReAllocate(size); |
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// Now revise the head and size (tail needn't change) to reflect the new size
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head = size - 1; |
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} |
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private: |
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void ReAllocate(unsigned int size) |
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{ |
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// Just in case we're re-allocating less room than we had before, make sure that we don't overrun the buffer by trying to write more elements than
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// are now possible for this vector to hold.
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if(Size() > (int)size) |
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head = size - 1; |
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// Allocate an array twice the size of that of the old
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VectorType *_begin = new VectorType[size]; |
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VectorType *_storage = _begin + size; |
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int _head = Size() - 1; |
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// Copy across all the old array's data and rearrange it!
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for(int i = 0; i < Size(); i++) |
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_begin[i] = (*this)[i]; |
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// Free the old memory
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delete[] begin; |
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// Redirect the old array to point to the new one
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begin = _begin; |
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storage = _storage; |
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head = _head; |
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} |
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}; |
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#endif // VECTOR_H
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