I am trying to create a text generator which shall generate following output:
localparam OR_CHANNEL_DATA_WIDTH = 2;
localparam RQ_CHANNEL_DATA_WIDTH = 18;
localparam RSP_CHANNEL_DATA_WIDTH = 8;
localparam VIN_CHANNEL_DATA_WIDTH = 43;
localparam VOUT_CHANNEL_DATA_WIDTH = 123;
I used std::stringstream to build the stream:
std::stringstream ss;
ss << "localparam OR_CHANNEL_DATA_WIDTH" << std::right << std::setw(80) << " = " << Sth::get() << ";\n";
ss << "localparam RQ_CHANNEL_DATA_WIDTH" << std::right << std::setw(80) << " = " << Sth::get() << ";\n";
ss << "localparam RSP_CHANNEL_DATA_WIDTH" << std::right << std::setw(80) << " = " << Sth::get() << ";\n";
Sth::get() will return number. There are many such lines that needs to be generated. But the text in the middle is not fixed. How can I achieve the above output
I am not sure you can do it in a simple streaming operation, but easily write a small function that does the job:
#include <iostream>
#include <sstream>
#include <iomanip>
const std::string adjust_width(const std::string& s, int width)
{
std::stringstream temp;
temp << std::left << std::setw(width) << s;
return temp.str();
}
int main()
{
std::stringstream ss;
ss << adjust_width("localparam OR_CHANNEL_DATA_WIDTH", 80) << " = " << 1 << ";\n";
ss << adjust_width("localparam RQ_CHANNEL_DATA_WIDTH", 80) << " = " << 12 << ";\n";
ss << adjust_width("localparam RSP_CHANNEL_DATA_WIDTH", 80) << " = " << 123 << ";\n";
ss << adjust_width("localparam VIN_CHANNEL_DATA_WIDTH", 80) << " = " << 1234 << ";\n";
std::cout << ss.str();
return 0;
}
Related
I have a std::vector<std::string>>. Following is my full program:
#include <iostream>
#include <vector>
#include <string>
#include <map>
int main() {
std::cout << " -- Beginining of program -- " << std::endl;
std::map<std::string, std::vector<std::string>> my_map_2;
std::vector<std::string> s = {"a", "b", "c"};
my_map_2.insert(std::make_pair("key1", s));
std::vector<std::string> s2 = {"d", "e", "f"};
my_map_2.insert(std::make_pair("key1", s2));
for(auto const &map_item: my_map_2) {
std::cout << map_item.first << " " << map_item.second[0] << std::endl;
std::cout << map_item.first << " " << map_item.second[1] << std::endl;
std::cout << map_item.first << " " << map_item.second[2] << std::endl;
std::cout << map_item.first << " " << map_item.second[3] << std::endl;
std::cout << map_item.first << " " << map_item.second[4] << std::endl;
std::cout << map_item.first << " " << map_item.second[5] << std::endl;
}
std::cout << " -- End of program -- " << std::endl;
return 0;
}
Problem:
I don't see the items of s2 when I print values of my_map_2. I see them only if I add s2 with a new key! If I do my_map_2.insert(std::make_pair("key2", s2)) instead of my_map_2.insert(std::make_pair("key1", s2)), I do see the items.
Question:
So, my question is, how to I append more items to the vector pointed to by key1 of my_map_2?
The below fails because the key is already taken:
std::vector<std::string> s2 = {"d", "e", "f"};
my_map_2.insert(std::make_pair("key1", s2)); // fails
To append to the mapped vector, you could do like this:
auto& vec = my_map_2["key1"]; // get reference to the existing vector
vec.insert(vec.end(), s2.begin(), s2.end()); // append to it
To view the keys and all the values in the vector you could change your loop to this:
for(auto const&[key, value]: my_map_2) {
for(const std::string& str : value) {
std::cout << key << ' ' << str << '\n';
}
}
my_map_2["key1"] is always a valid vector. You can insert into it directly
#include <iostream>
#include <vector>
#include <string>
#include <map>
int main() {
std::cout << " -- Beginining of program -- " << std::endl;
std::map<std::string, std::vector<std::string>> my_map_2;
std::vector<std::string> s = {"a", "b", "c"};
my_map_2["key1"].insert(my_map_2["key1"].end(), s.begin(), s.end());
std::vector<std::string> s2 = {"d", "e", "f"};
my_map_2["key1"].insert(my_map_2["key1"].end(), s2.begin(), s2.end());
for(auto const &map_item: my_map_2) {
for(auto const &value: map_item.second) {
std::cout << map_item.first << " " << value << std::endl;
}
}
std::cout << " -- End of program -- " << std::endl;
return 0;
}
Get iterator to key1, and just pushs back new items to existing vector:
std::vector<std::string> s2 = {"d", "e", "f"};
auto it = my_map_2.find("key1");
if (it != my_map_2.end())
std::move(s2.begin(), s2.end(), std::back_inserter(it->second));
else
my_map_2.insert(std::make_pair("key1",std::move(s2)));
To see: d,e,f you have to access 3,4 and 5 indices of vector. (You want to append new items, or just override existed items for given key?)
I have created 2 Publishers connecting to the same static location .
Publisher1
dummyFrontEnd::dummyFrontEnd():context(1),socket(context,ZMQ_PUB) {
}
void dummyFrontEnd::Init()
{
socket.connect("tcp://127.0.0.1:5555");
cout << "Connecting .... " << endl;
}
void dummyFrontEnd::SendTwoTables()
{
cout << "In SendTwoTables" <<endl;
while(1) {
canlogreq canLogObj = canlogreq::default_instance();
canLogObj.set_fromhours(11);
canLogObj.set_fromminutes(7);
canLogObj.set_fromseconds(2);
canLogObj.set_fromday(16);
canLogObj.set_frommonth(5);
canLogObj.set_fromyear(2020);
canLogObj.set_tohours(12);
canLogObj.set_tominutes(7);
canLogObj.set_toseconds(4);
canLogObj.set_today(17);
canLogObj.set_tomonth(5);
canLogObj.set_toyear(2020);
zmq::message_t logsnippetmsg(canLogObj.ByteSizeLong() + sizeof(uint16_t));
*((uint16_t*)logsnippetmsg.data()) = 20;
canLogObj.SerializeToArray(logsnippetmsg.data()+sizeof(uint16_t), canLogObj.ByteSizeLong());
socket.send(logsnippetmsg);
usleep(1);
canLogObj.clear_fromhours();
canLogObj.clear_fromminutes();
canLogObj.clear_fromseconds();
canLogObj.clear_fromday();
canLogObj.clear_frommonth();
canLogObj.clear_fromyear();
canLogObj.clear_tohours();
canLogObj.clear_tominutes();
canLogObj.clear_toseconds();
canLogObj.clear_today();
canLogObj.clear_tomonth();
canLogObj.clear_toyear();
}
}
Publisher2:
dummyFrontEnd::dummyFrontEnd():context(1),socket(context,ZMQ_PUB) {
}
void dummyFrontEnd::Init()
{
socket.connect("tcp://127.0.0.1:5555");
cout << "Connecting .... " << endl;
}
void dummyFrontEnd:: SendData() {
while (std::getline(file, line_str)) {
std::stringstream ss(line_str);
double tdiff;
int i;
char J;
int _1939;
int pgn;
char p;
int priority;
char _0;
int source;
char dash;
std::string direction;
char d;
int length;
int data[8];
ss >> tdiff >> i >> J >> _1939 >> pgn >> p >> priority >> _0 >> source
>> dash >> direction >> d >> length >> data[0] >> data[1] >> data[2]
>> data[3] >> data[4] >> data[5] >> data[6] >> data[7];
timestamp += tdiff;
while (gcl_get_time_ms() - start_time <
uint64_t(timestamp * 1000.0) - first_time) { usleep(1); }
if (arguments.verbose) {
std::cout << timestamp << " " << i << " " << J << " " << _1939 << " "
<< pgn << " " << p << " " << priority << " " << _0 << " " << source
<< " " << dash << " " << direction << " " << d << " " << length
<< " " << data[0] << " " << data[1] << " " << data[2] << " "
<< data[3] << " " << data[4] << " " << data[5] << " " << data[6]
<< " " << data[7] << std::endl;
}
uint64_t timestamp_ms = (uint64_t)(timestamp * 1000.0);
protoTable.add_columnvalues(uint64ToString(timestamp_ms) /* timestamp */);
protoTable.add_columnvalues(intToString(pgn) /* PGN */);
protoTable.add_columnvalues(intToString(priority) /* Priority */);
protoTable.add_columnvalues(intToString(source) /* Source */);
protoTable.add_columnvalues(direction /* Direction */);
protoTable.add_columnvalues(intToString(length) /* Length */);
protoTable.add_columnvalues(intToString(data[0]) /* data1 */);
protoTable.add_columnvalues(intToString(data[1]) /* data2 */);
protoTable.add_columnvalues(intToString(data[2]) /* data3 */);
protoTable.add_columnvalues(intToString(data[3]) /* data4 */);
protoTable.add_columnvalues(intToString(data[4]) /* data5 */);
protoTable.add_columnvalues(intToString(data[5]) /* data6 */);
protoTable.add_columnvalues(intToString(data[6]) /* data7 */);
protoTable.add_columnvalues(intToString(data[7]) /* data8 */);
zmq::message_t create_values(protoTable.ByteSizeLong()+sizeof(uint16_t));
*((uint16_t*)create_values.data()) = TABLEMSG_ID; // ID
protoTable.SerializeToArray(create_values.data()+sizeof(uint16_t), protoTable.ByteSizeLong());
socket.send(create_values);
protoTable.clear_columnvalues();
usleep(1);
}
}
Subscriber
TransportLayer::TransportLayer():context(1),socket(context,ZMQ_SUB){ }
void TransportLayer::Init()
{
socket.bind("tcp://*:5555");
socket.setsockopt(ZMQ_SUBSCRIBE, "", 0);
}
void TransportLayer::Receive()
{
cout <<"TransportLayer::Receive " << " I m in server " << endl;
static int count = 1 ;
// Producer thread.
while ( true ){
zmq::message_t request;
string protoBuf;
socket.recv(&request);
uint16_t id = *((uint16_t*)request.data());
cout <<"TransportLayer : "<<"request.data: "<< request.data() << endl;
cout << "TransportLayer: count " << count<< endl; count = count+1 ;
cout <<"TransportLayer : request.data.size "<< request.size() << endl;
protoBuf = std::string(static_cast<char*>(request.data()+sizeof(uint16_t)), request.size()-sizeof(uint16_t));
cout << "ProtoBuf : " << protoBuf << endl;
InterfaceLayer *interfaceLayObj = InterfaceLayer::getInstance();
switch(id) {
case TABLEMSG_ID: cout << "Canlyser" << endl;
interfaceLayObj->ParseProtoBufTable(protoBuf);
break;
case LOGSNIPPET_ID:cout << "LogSnip" << endl;
interfaceLayObj->ParseProtoBufLogSnippet(protoBuf);
interfaceLayObj->logsnippetSignal(); // publish the signal
break;
default:
break;
}
usleep(1);
}
}
Observation :
I)
Execution Order .
1. Started Subscriber
2. Started Publisher1 ( it sent only one data value)
Subscriber missed to receive this data.
II) modified Publisher1 to send the same data in a while loop
Execution Order
1. Started Subscriber
2. Started Publisher1
3. Started Publsiher2 .
Now I see that Subscriber is receiving the data from both publishers .
This gives me an indication that there is a possibility for data loss.
How do I ensure there is absolutely no data loss.
Thanks
Your producer may be sending its one message before the subscription handshaking has completed. As a result, the publish socket discards the message because there is no subscription registered.
If you use an XPUB socket (ZMQ_XPUB -- see http://api.zeromq.org/4-2:zmq-socket) instead of a PUB socket, your program can wait for a subscribe message, so that it knows that someone is listening, before sending its message(s).
int main() {
int x = 3613;
std::cout << "x= " << x << std::endl;
std::string xBin = std::bitset<16>(x).to_string();
std::cout << xBin << std::endl;
unsigned long xDecimal = std::bitset<16>(xBin).to_ulong();
std::cout << xDecimal << std::endl;
std::cout << std::endl << std::endl;
int b01 = 0b11001;
std::cout << "b01= " << b01 << std::endl;
int b02 = 0b1010;
std::cout << "b02= " << b02 << std::endl;
int b03 = b01 + b02;
std::cout << "int b03 = b01 + b02 = " << b03 << std::endl;
return 0;
}
Output:
x= 3613
0000111000011101
3613
b01= 25
b02= 10
int b03 = b01 + b02 = 35
With binary literals we can do normal arithmetic operations, while with the strings obtained with std::bitset<> this is not possible.
So...the question is: how to "compose" the binary literals, for example through the conversion from decimal to binary as obtained using std::bitset<> ?
Looking forward to your kind help. Marco
You shouldn't operate on bitsets by converting them to string and back - that's missing the point of bitsets... Instead you operate on them by using binary operators: &, |, ^, ... (just like you would on usual integers).
std::cout << std::bitset<3>(4) << " or "
<< std::bitset<3>(2) << " = "
<< (std::bitset<3>(4) | std::bitset<3>(2)) << std::endl;
Prints: 100 or 010 = 110
You can find all operators on wiki: http://en.cppreference.com/w/cpp/utility/bitset
first of all, forgive my code for being ugly. The tons of ideas I've been given to try to fix this code have jumbled it up after all the potential solutions that haven't worked. Basically, I'm coding a Hearthstone rip-off that reads in two .txt files with card information and battles them to see which player wins. The issue is that when I'm trying to save the player's name (the first line in the files), it saves the whole file instead of just the first line. When I have managed to fix that, the for loop used to save the information for the card objects (format: card name, card power, card health) does not get saved properly for some reason. Any help would be appreciated, I've been trying to fix this for two days and nothing has fully solved the problem. I'll attach the read in files first before the code.
Disclaimer: It's a lot of lines and I'm sorry about that. Also I think the problem could be that my Mac is not saving the .txt in a format that has the right line endings. I'm using XCode as my IDE. Thank you so much to whomever is willing to help!
File1:
The Innkeeper
3
Tunnel Trogg
1
3
Neptulon
7
7
Fire Elemental
6
5
File2:
Malfurion
3
Leper Gnome
2
1
Aviana
5
5
Cenarius
5
8
Main:
#include "Player.h"
using namespace std;
int main()
{
cout << "Please enter file name of the first player: " << endl;
string inFile = "";
getline(cin, inFile);
Player* p1 = new Player(inFile);
cout << "Now enter the file name of the second player: " << endl;
getline(cin, inFile);
Player* p2 = new Player(inFile);
p1->battle(*p2);
delete p1;
delete p2;
return 0;
}
Player Header:
#include "Card.h"
#include <fstream>
#ifndef Player_h
#define Player_h
using namespace std;
class Player
{
private:
string playerName;
int numCards;
Card ** cards;
int wins = 0;
public:
Player(std::string inFile);
void battle(Player p2);
Card* getCard(int counter);
~Player();
};
#endif /* Player_h */
Card Header:
#include <string>
#include <iostream>
#ifndef Card_h
#define Card_h
using namespace std;
class Card
{
public:
Card();
string getName();
int getPower();
int getHealth();
void setName(string newName);
void setPower(int newPower);
void setHealth(int newHealth);
Card* duel(Card&);
friend ostream& operator<<(ostream& o, Card& c);
friend bool operator==(Card& p1Card, Card& p2Card);
private:
string name;
int power;
int health;
};
#endif /* Card_h */
Player Source:
#include "Player.h"
using namespace std;
Player::Player(string inFile)
{
ifstream in(inFile, ios::in);\
if (!in)
{
cerr << "There was a problem opening the file. Sorry, try again!" << endl;
return;
}
getline(in, playerName);
cout << playerName << endl;
in>>numCards;
playerName = "";
numCards = 0;
cards = new Card* [numCards];
string tempName = "";
int tempPower = 0;
int tempHealth = 0;
for (int i = 0; i<numCards; i++)
{
in.ignore();
cards[i] = new Card();
getline(in, tempName);
cout << "in for loop: " << endl;
cout << tempName << ",";
cards[i]->setName(tempName);
in >> tempPower;
in.ignore();
cout << tempPower << ",";
cards[i]->setPower(tempPower);
in >> tempHealth;
cout << tempHealth << " done"<< endl;
cards[i]->setHealth(tempHealth);
}
}
void Player::battle(Player p2)
{
int draws = 0;
cout << "Let the battle begin!" << endl;
cout << numCards << endl;
if (wins > p2.wins)
{
cout << playerName << " wins over " << p2.playerName << ", " << wins << " to " << p2.wins;
if (draws == 0)
{
cout << " and no ties." << endl;
}
else
{
cout << " and " << draws << " ties." << endl;
}
}
else if (p2.wins > wins)
{
cout << p2.playerName << " wins over " << playerName << ", " << p2.wins << " to " << wins;
if (draws == 0)
{
cout << " and no ties." << endl;
}
else
{
cout << " and " << draws << " ties." << endl;
}
}
else if (p2.wins == wins)
{
cout << "It is a draw between " << playerName << " and " << p2.playerName << ", with " << wins << " for each and ";
if (draws == 0)
{
cout << "no ties." << endl;
}
else
{
cout << draws << " ties." << endl;
}
}
cout << "Here are the detailed results:" << endl;
for (int i = 0; i < numCards; i++)
{
cout << *cards[i] << " vs. " << *p2.cards[i] << " - ";
if (*cards[i] == *p2.cards[i])
{
cout << "It is a draw." << endl;
}
else if (cards[i]->duel(*p2.cards[i]) == NULL)
{
cout << "It is a draw." << endl;
}
else if (*cards[i]->duel(*p2.cards[i]) == *p2.cards[i])
{
cout << p2.cards[i]->getName() << "wins for " << p2.playerName << "." << endl;
}
else if (*cards[i]->duel(*p2.cards[i]) == *cards[i])
{
cout << cards[i]->getName() << "wins for " << playerName << "." << endl;
}
}
}
Player::~Player()
{
if (cards != NULL)
{
for (int i = 0; i < numCards; i++)
{
if (cards[i] != nullptr)
{
delete cards[i];
cards[i] = NULL;
}
};
}
}
Card Source:
#include "Card.h"
using namespace std;
Card::Card()
{
name = "";
power = 0;
health = 0;
}
string Card::getName()
{
return name;
}
int Card::getPower()
{
return power;
}
int Card::getHealth()
{
return health;
}
void Card::setName(string newName)
{
name = newName;
}
void Card::setPower(int newPower)
{
power = newPower;
}
void Card::setHealth(int newHealth)
{
health = newHealth;
}
Card* Card::duel(Card& otherCard)
{
if ((otherCard.getHealth() - this->getPower() <=0) && (getHealth() - otherCard.getPower() <= 0))
{
return NULL;
}
else if ((otherCard.getHealth() - this->getPower() >0) && (getHealth() - otherCard.getPower() >0))
{
return NULL;
}
else if (otherCard.getHealth() - this->getPower() <=0)
{
return this;
}
else if (this->getHealth() - otherCard.getPower() <=0)
{
return &otherCard;
}
return NULL;
}
ostream& operator<<(ostream& o, Card& c)
{
o << c.getName() << " (" << c.power << ", " << c.health << ") " << endl;
return o;
}
bool operator==(Card& p1Card, Card& p2Card)
{
if (p1Card.health == p2Card.health &&
p1Card.power == p2Card.power &&
p1Card.name == p2Card.name)
{
return true;
}
else
{
return false;
}
}
Your code is almost right. It can read the Player's name and the card numbers, but your codes showed below:
in>>numCards;
playerName = "";
numCards = 0;
cards = new Card* [numCards];
at first, it read the num of card and store it to numCards, it is right.
next, you clear the value of the numCards, then, you lost the num of the Card, so the codes followed it are executed with numCards == 0
You can just comment the line numCards = 0, and your code is executed right.
How can I reach global variables from inner scopes, given the following code sample, how can I reach the global string X from the main function and from the most inner scope as well, also is the most inner scope is accessible once we quit it to the main scope or other scope?
#include <iostream>
#include <string>
std::string x = "global";
int counter = 1;
int main()
{
std::cout <<counter ++ << " " << x << std::endl;
std::string x = "main scope";
std::cout <<counter ++ << " " << x << std::endl;
{
std::cout <<counter ++ << " " << x << std::endl;
std::string x = "inner scope";
std::cout <<counter ++ << " " << x << std::endl;
}
std::cout <<counter++ << " " << x << std::endl;
}
the cout currently is:
1 global
2 main scope
3 main scope
4 inner scope
5 main scope
Global scope can be reached by using ::x, as per:
#include <iostream>
#include <string>
std::string x = "global";
int counter = 1;
int main()
{
std::cout << counter++ << " " << x << std::endl;
std::string x = "main scope";
std::cout << " " << ::x << std::endl;
std::cout << counter++ << " " << x << std::endl;
{
std::cout << " " << ::x << std::endl;
std::cout << counter++ << " " << x << std::endl;
std::string x = "inner scope";
std::cout << " " << ::x << std::endl;
std::cout << counter++ << " " << x << std::endl;
}
std::cout << " " << ::x << std::endl;
std::cout << counter++ << " " << x << std::endl;
}
which gives you:
1 global
global
2 main scope
global
3 main scope
global
4 inner scope
global
5 main scope
The hard bit is actually getting to the intermediate scopes, such as main scope when you're withing the inner scope.
One way to do that is with references:
#include <iostream>
#include <string>
std::string x = "outer";
int main()
{
std::cout << "1a " << x << "\n\n";
std::string x = "middle";
std::cout << "2a " << ::x << '\n';
std::cout << "2b " << x << "\n\n";
{
std::string &midx = x; // make ref to middle x.
std::string x = "inner"; // hides middle x.
std::cout << "3a " << ::x << '\n';
std::cout << "3b " << midx << '\n'; // get middle x via ref.
std::cout << "3c " << x << "\n\n";
}
}
which gives:
1a outer
2a outer
2b middle
3a outer
3b middle
3c inner
But, as good advice, you'll find you won't have anywhere near as many problems if you:
name your variables a little more intelligently so as to avoid clashes; and
avoid global variables like the plague :-)
And, as for the variables in inner scopes, they cease to be available once you leave that scope, even with a reference (you can copy them to a variable with an larger scope but that's not the same as accessing the inner-scoped variable).