OTcl and C++ linkages in NS2
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This document discusses OTCL/C++ linkages and provides an example of creating a simple agent class in C++ and exposing it to OTCL. It shows the C++ code for the TSPAgent class with public, private and protected variables and functions. It then shows how to define a TclClass for TSPAgent and register it. The example demonstrates how to instantiate a TSPAgent object from OTCL and call its member functions. The document also briefly describes two case studies on multimedia over UDP and provides information on where to modify different aspects of the NS-2 network simulator code.
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#include
#include
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int sum(int number1,int number2){
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int sub(int number1,int number2){
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}
/*mul function implementation*/
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}
/*divide function implementation*/
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{
char *pointer;
int c;
pointer = malloc(length+1);
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printf(\"Unable to allocate memory.\ \");
exit(1);
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{
*(pointer+c) = *(string+position-1);
string++;
}
*(pointer+c) = \'\\0\';
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/*Variable declarations*/
int number1,number2;
char *operator,*str1,*str2;
char line[50];
char s[2] = \" \";
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printf(\"Result %d \ \",mul(number1,number2));
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printf(\"Result %.2f \ \",divide(number1,number2));
}
}
}
return 0;
}
/*******************Output***********************/
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Calculator.c: In function ‘main’:
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int errorFlag=0;// checking if user entered more then one operands
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operator = strtok(line, \" \");
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break;
}
/*String to integer --- token1*/
number1=atoi(strtok(NULL, s));
/*Removing ( and ) from String*/
str2=strtok(NULL, s);
char *content;int length=0;
for(int i=0; str2[i]!=\'\\0\'; ++i){length++;}
if(str2[0]==\'(\'){
content=substring(str2,2,length-1);
char *opr=content;
int n1=atoi(strtok(NULL, s));
int n2=atoi(strtok(NULL, s));
/*If user entered more then two operands then it will return some token otherwise it will
return NULL pointer*/
if(strtok(NULL, s)!=NULL){
printf(\"You need to enter operator operand1 operand2 \ \");
errorFlag=1;
}else{
if(strcmp(opr,\"sum\")==0){
number2=sum(n1,n2);
}else if(strcmp(opr,\"sub\")==0){
number2=sub(n1,n2);
}else if(strcmp(opr,\"mul\")==0){
number2=mul(n1,n2);
} else if(strcmp(opr,\"div\")==0){
number2=divide(n1,n2);
}
}
}else{
number2=atoi(str2);
/*If user entered more then two operands then it will return some token otherwise it will return
NULL pointer*/
if(strtok(NULL, s)!=NULL){
printf(\"You need to enter operator operand1 operand2 \ \");
errorFlag=1;
}
}
if(errorFlag!=1){
/*Checking operator by strcmp function*/
if(strcmp(operator,\"sum\")==0){
printf(\"Result %d \ \",sum(number1,number2));
}else if(strcmp(operator,\"sub\")==0){
printf(\"Result %d \ \",sub(number1,number2));
}else if(strcmp(operator,\"mul\")==0){
printf(\"Result %d \ \",mul(number1,number2));
} else if(strcmp(operator,\"div\")==0){
printf(\"Result %.2f \ \",divide(number1,number2));
}
}
}
return 0;
}
/********************output************************/
gopal@gopal:~/Desktop/chegg$ gcc Calculator.c
Calculator.c: In function ‘main’:
Calculator.c:67:3: warning: implicit declaration of function ‘gets’ [-Wimplicit-function-
declaration]
gets(.
Game unleashedjavascript
JavaScript for Unleashed a game about a robbery in London and its pretty long i do not know why you would want it but here have it :P also this is not pro its just for school because i am a loner like that and i have nothing better to do
Shell to be modified#include stdlib.h #include unistd.h .pdf
Shell to be modified
#include
#include
#include
#include
#include
#include
#include
#include
// Simplifed xv6 shell.
#define MAXARGS 10
// All commands have at least a type. Have looked at the type, the code
// typically casts the *cmd to some specific cmd type.
struct cmd {
int type; // ' ' (exec), | (pipe), '<' or '>' for redirection
};
struct execcmd {
int type; // ' '
char *argv[MAXARGS]; // arguments to the command to be exec-ed
};
struct redircmd {
int type; // < or >
struct cmd *cmd; // the command to be run (e.g., an execcmd)
char *file; // the input/output file
int mode; // the mode to open the file with
int fd; // the file descriptor number to use for the file
};
struct pipecmd {
int type; // |
struct cmd *left; // left side of pipe
struct cmd *right; // right side of pipe
};
int fork1(void); // Fork but exits on failure.
struct cmd *parsecmd(char*);
// Execute cmd. Never returns.
void
runcmd(struct cmd *cmd)
{
int p[2], r;
struct execcmd *ecmd;
struct pipecmd *pcmd;
struct redircmd *rcmd;
if(cmd == 0)
exit(0);
switch(cmd->type){
default:
fprintf(stderr, "unknown runcmd\n");
exit(-1);
case ' ':
ecmd = (struct execcmd*)cmd;
if(ecmd->argv[0] == 0)
exit(0);
fprintf(stderr, "exec not implemented\n");
// Your code here ...
break;
case '>':
case '<':
rcmd = (struct redircmd*)cmd;
fprintf(stderr, "redir not implemented\n");
// Your code here ...
runcmd(rcmd->cmd);
break;
case '|':
pcmd = (struct pipecmd*)cmd;
fprintf(stderr, "pipe not implemented\n");
// Your code here ...
break;
}
exit(0);
}
int
getcmd(char *buf, int nbuf)
{
if (isatty(fileno(stdin)))
fprintf(stdout, "$ ");
memset(buf, 0, nbuf);
fgets(buf, nbuf, stdin);
if(buf[0] == 0) // EOF
return -1;
return 0;
}
int
main(void)
{
static char buf[100];
int fd, r;
// Read and run input commands.
while(getcmd(buf, sizeof(buf)) >= 0){
if(buf[0] == 'c' && buf[1] == 'd' && buf[2] == ' '){
// Clumsy but will have to do for now.
// Chdir has no effect on the parent if run in the child.
buf[strlen(buf)-1] = 0; // chop \n
if(chdir(buf+3) < 0)
fprintf(stderr, "cannot cd %s\n", buf+3);
continue;
}
if(fork1() == 0)
runcmd(parsecmd(buf));
wait(&r);
}
exit(0);
}
int
fork1(void)
{
int pid;
pid = fork();
if(pid == -1)
perror("fork");
return pid;
}
struct cmd*
execcmd(void)
{
struct execcmd *cmd;
cmd = malloc(sizeof(*cmd));
memset(cmd, 0, sizeof(*cmd));
cmd->type = ' ';
return (struct cmd*)cmd;
}
struct cmd*
redircmd(struct cmd *subcmd, char *file, int type)
{
struct redircmd *cmd;
cmd = malloc(sizeof(*cmd));
memset(cmd, 0, sizeof(*cmd));
cmd->type = type;
cmd->cmd = subcmd;
cmd->file = file;
cmd->mode = (type == '<') ? O_RDONLY : O_WRONLY|O_CREAT|O_TRUNC;
cmd->fd = (type == '<') ? 0 : 1;
return (struct cmd*)cmd;
}
struct cmd*
pipecmd(struct cmd *left, struct cmd *right)
{
struct pipecmd *cmd;
cmd = malloc(sizeof(*cmd));
memset(cmd, 0, sizeof(*cmd));
cmd->type = '|';
cmd->left = left;
cmd->right = right;
return (struct cmd*)cmd;
}
// Parsing
char whitespace[] = " \t\r\n\v";
char symbols[] = "<|>";
int
ge.
Overloading
Operator overloading allows programmers to define special member functions to give class objects behaviors similar to built-in types when operators are used. There are three ways to implement operator overloading functions: member functions, non-member functions, and friend functions. Member functions are called as methods on the object while non-member functions are called independently. Friend functions have access to private members.
Exception Handling1
- Exception handlers immediately follow a try block and are denoted by the catch keyword. Each catch clause handles a single exception type.
- Exception specifications inform users of the types of exceptions a function can throw. They use the throw keyword and appear after a function's argument list.
- The set_unexpected() and set_terminate() functions allow customizing the handlers called for unexpected exceptions and uncaught exceptions, respectively.
Generics
C# generics allow the specification of type parameters for classes, interfaces, and methods. This allows types to be deferred until runtime, providing type safety. Generics eliminate the need to use base object types and casts. Well-known generic collections like List<T> are provided in the System.Collections.Generic namespace.
Lecture5
Operator overloading allows programmers to define special member functions to customize the behavior of operators (like +, -, etc.) for user-defined types. It can be implemented through member functions, non-member functions, or friend functions. Inline functions replace function calls with the function code directly, which can improve performance for short functions.
Whats new in_csharp4
The document summarizes new features in C# 4.0 including optional and named parameters, dynamic typing, tuples, complex numbers, parallel programming, and thread-safe data structures. It also mentions code contracts, memory-mapped files, and the Managed Extensibility Framework.
Smart Pointer in C++
Smart pointers in C++ automatically delete the object they point to when the smart pointer goes out of scope. There are different types of smart pointers including std::auto_ptr, deep copy pointers, and reference counted pointers like boost::shared_ptr. Reference counted pointers use a reference counter to track the number of smart pointers pointing to an object. When that count reaches 0, the object is deleted. Smart pointers provide memory management benefits over raw pointers by automatically freeing memory and avoiding issues like dangling pointers.
C++11
C++11 introduced several new features for functions and lambdas including:
1. Lambda expressions that allow the definition of anonymous inline functions.
2. The std::function wrapper that allows functions and lambdas to be used interchangeably.
3. std::bind that binds arguments to function parameters for creating function objects.
These features improved support for functional programming patterns in C++.
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This document provides an overview of how to write plugins for the Apache Traffic Server (ATS) web server. It discusses the plugin architecture, including initialization, hook registration, and handling events through continuations. It also covers key APIs for interacting with transactions, sessions, URLs, HTTP headers, and more. The goal is to provide newcomers with enough information to get started writing their first ATS plugin.
.net progrmming part1
This document contains source code for 10 programming exercises in C# .NET: 1) multiplication table; 2) perfect number checker; 3) Armstrong number checker; 4) palindrome number checker; 5) digit sum calculator; 6) prime number generator within a range; 7) Floyd's triangle generator; 8) ASCII value finder; 9) factor finder; 10a) decimal to binary converter and 10b) binary to decimal converter. For each exercise, the source code is provided along with sample input/output. The code includes classes, methods to get input, perform calculations and display output, and loops to allow running the programs multiple times.
Similar to OTcl and C++ linkages in NS2 (20)
operating system ubuntu,linux,MacProgram will work only if you g.pdf
operating system ubuntu,linux,MacProgram will work only if you g.pdf
operating system Linux,ubuntu,Mac#include stdio.h #include .pdf
operating system Linux,ubuntu,Mac#include stdio.h #include .pdf
Shell to be modified#include stdlib.h #include unistd.h .pdf
Shell to be modified#include stdlib.h #include unistd.h .pdf
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此贴长年有效【贴心专线/微-信: 95270640】敬请保留此联系方式以备用！如有不在线请给我们留言！我们将在第一时间给您回复!上散发着一抹抹的光晕而这每处自然形成的细节融合在一起浑然天成的美实在令人心生愉悦小道的周边无秩序的生长着几株艳丽的野花红的粉的紫的虽混乱无章却给这幅美景更增添一份性感夹杂着一份纯洁的妖娆毫无违和感实在给人带来一份悠然幸福的心情如果说现在的审美已经断然拒绝了无声的话那么在树林间飞掠而过的小鸟叽叽咋咋的叫声是否就是这最后的点睛之笔悠然走在林间的小路上宁静与清香一丝丝的盛夏气息吸入身体昔日生活里的繁忙多
Need for Speed: Removing speed bumps from your Symfony projects ⚡️
No one wants their application to drag like a car stuck in the slow lane! Yet it’s all too common to encounter bumpy, pothole-filled solutions that slow the speed of any application. Symfony apps are not an exception.
In this talk, I will take you for a spin around the performance racetrack. We’ll explore common pitfalls - those hidden potholes on your application that can cause unexpected slowdowns. Learn how to spot these performance bumps early, and more importantly, how to navigate around them to keep your application running at top speed.
We will focus in particular on tuning your engine at the application level, making the right adjustments to ensure that your system responds like a well-oiled, high-performance race car.
Using Query Store in Azure PostgreSQL to Understand Query Performance
Microsoft has added an excellent new extension in PostgreSQL on their Azure Platform. This session, presented at Posette 2024, covers what Query Store is and the types of information you can get out of it.
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Explore the seamless transition to e-invoicing with this comprehensive guide tailored for Saudi Arabian businesses. Navigate the process effortlessly with step-by-step instructions designed to streamline implementation and enhance efficiency.
Measures in SQL (SIGMOD 2024, Santiago, Chile)
SQL has attained widespread adoption, but Business Intelligence tools still use their own higher level languages based upon a multidimensional paradigm. Composable calculations are what is missing from SQL, and we propose a new kind of column, called a measure, that attaches a calculation to a table. Like regular tables, tables with measures are composable and closed when used in queries.
SQL-with-measures has the power, conciseness and reusability of multidimensional languages but retains SQL semantics. Measure invocations can be expanded in place to simple, clear SQL.
To define the evaluation semantics for measures, we introduce context-sensitive expressions (a way to evaluate multidimensional expressions that is consistent with existing SQL semantics), a concept called evaluation context, and several operations for setting and modifying the evaluation context.
A talk at SIGMOD, June 9–15, 2024, Santiago, Chile
Authors: Julian Hyde (Google) and John Fremlin (Google)
https://doi.org/10.1145/3626246.3653374
Microservice Teams - How the cloud changes the way we work
A lot of technical challenges and complexity come with building a cloud-native and distributed architecture. The way we develop backend software has fundamentally changed in the last ten years. Managing a microservices architecture demands a lot of us to ensure observability and operational resiliency. But did you also change the way you run your development teams?
Sven will talk about Atlassian’s journey from a monolith to a multi-tenanted architecture and how it affected the way the engineering teams work. You will learn how we shifted to service ownership, moved to more autonomous teams (and its challenges), and established platform and enablement teams.
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OTcl and C++ linkages in NS2
- 10. Case study – 2 – Multimedia over udp • to build a multimedia application that runs over a UDP connection, • five rate media scaling • by changing encoding and transmission policy pairs associated with scale parameter values.
- 11. Case study – 2 – Multimedia over udp • Based on 5 rate – 0 0.3mb – 1 0.6mb – 2 0.9mb – 3 1.2mb – 4 1.5mb – Packetsize 1000 – Random false
- 13. Where to modify • ~ns-2.34 is the folder where all the cc modules are located Topic Where to modify Routing Protocol (AODV, DSDV, DSR) ~ns-2.34/aodv/aodv.cc, aodv_rtable.cc, etc Mobile Node (Energy, Propagation, Antenna) ~ns-2.34/mobile/*.cc and *.h TCP (Vegas, Reno, New Reno, etc) ~ns-2.34/tcp/ *.cc New packet, agent to be added ~ns-2.34/common/packet.h, agent.h Wireless Physical layer or MAC Layer modification ~ns-2.34/mac/*.cc
- 14. Where to modify Topic Where to modify MPLS ~ns-2.34/mpls Adding a new Queue ~ns-2.34/queue/*.cc and *.h Adding a new application ~ns-2.34/apps/app.h Sensors ~ns-2.34/sensor-net (still to be developed) Examples (more than 100) ~ns-2.34/tcl/ex/ What not lot more in NS2