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testingwasm
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Final prototype, added README.md

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Stipe Varnica 5 months ago
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8 changed files with 1626 additions and 482 deletions
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  1. 51
      .vscode/settings.json
  2. 2
      C++/cmd.txt
  3. 26
      C++/test.cpp
  4. 1878
      C++/test.js
  5. BIN
      C++/test.wasm
  6. 11
      README.md
  7. 123
      index.html
  8. 17
      index.js

51
.vscode/settings.json
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@ -0,0 +1,51 @@
{
"liveServer.settings.port": 5501,
"files.associations": {
"cctype": "cpp",
"clocale": "cpp",
"cmath": "cpp",
"cstdarg": "cpp",
"cstddef": "cpp",
"cstdio": "cpp",
"cstdlib": "cpp",
"cstring": "cpp",
"cwchar": "cpp",
"cwctype": "cpp",
"array": "cpp",
"atomic": "cpp",
"bit": "cpp",
"*.tcc": "cpp",
"compare": "cpp",
"concepts": "cpp",
"cstdint": "cpp",
"deque": "cpp",
"string": "cpp",
"unordered_map": "cpp",
"vector": "cpp",
"exception": "cpp",
"algorithm": "cpp",
"functional": "cpp",
"iterator": "cpp",
"memory": "cpp",
"memory_resource": "cpp",
"numeric": "cpp",
"random": "cpp",
"string_view": "cpp",
"system_error": "cpp",
"tuple": "cpp",
"type_traits": "cpp",
"utility": "cpp",
"initializer_list": "cpp",
"iosfwd": "cpp",
"iostream": "cpp",
"istream": "cpp",
"limits": "cpp",
"new": "cpp",
"numbers": "cpp",
"ostream": "cpp",
"stdexcept": "cpp",
"streambuf": "cpp",
"cinttypes": "cpp",
"typeinfo": "cpp"
}
}

2
C++/cmd.txt
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@ -1 +1 @@
emcc -o test.js test.cpp -s NO_EXIT_RUNTIME=1 -s "EXPORTED_RUNTIME_METHODS=['ccall']"
emcc -lembind -o test.js test.cpp -s NO_EXIT_RUNTIME=1 -s "EXPORTED_RUNTIME_METHODS=['ccall']"

26
C++/test.cpp
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@ -1,18 +1,20 @@
#include <iostream>
#include <emscripten/emscripten.h>
#include <emscripten/bind.h>
#include <string>
using namespace emscripten;
extern "C" {
EMSCRIPTEN_KEEPALIVE
int myFunction(int number) {
return number * number;
}
std::string myFunction(std::string word)
{
std::string test = " testing";
return word + test;
};
EMSCRIPTEN_KEEPALIVE
int add(int a, int b) {
return a + b;
}
}
EMSCRIPTEN_BINDINGS(my_module)
{
function("myFunction", &myFunction);
};
int main() {
int main()
{
return 0;
}

1878
C++/test.js
File diff suppressed because it is too large
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BIN
C++/test.wasm
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11
README.md
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# Prototype
Link for compiling code with Embind → https://emscripten.org/docs/porting connecting_cpp_and_javascript/embind.html
Command for compiling code with Embind:
```
emcc -lembind -o test.js test.cpp -s NO_EXIT_RUNTIME=1 -s "EXPORTED_RUNTIME_METHODS=['ccall']"
```
- EMSCRIPTEN_BINDINGS macro is used to bind the C++ function to make it callable from JavaScript
- Emscripten compiles the C++ code to WebAssembly, generating a .wasm file and JavaScript glue code that loads the WebAssembly module and sets up the bindings
- When the HTML page is loaded, test.js is executed, loading the WebAssembly module , Emscripten's Module object is created, exposing the C++ functions (like myFunction) to JavaScript
- Example of using Module: var result = Module.myFunction(input)

123
index.html
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@ -10,27 +10,21 @@
href="node_modules/bootstrap/dist/css/bootstrap.min.css"
/>
<script src="./C++/test.js"></script>
<script src="index.js" defer></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-sm-6">
<div class="p-4">
<h1 class="mb-4">Square calculator</h1>
<input
id="numberInput"
class="form-control"
type="number"
placeholder="Enter a number"
/>
<h1 class="mb-4">Test</h1>
<input id="numberInput" class="form-control" type="text" />
<button
id="calculateBtn"
class="btn btn-primary mt-3"
onClick="calculateResult()"
>
Calculate square
Test
</button>
</div>
</div>
@ -42,115 +36,6 @@
</div>
</div>
</div>
<div class="container">
<div class="row">
<div class="col-sm-6">
<div class="p-4">
<h1>Sum calculator</h1>
<input
type="number"
class="form-control mb-1"
id="input1"
placeholder="Enter first number"
/>
<input
type="number"
class="form-control"
id="input2"
placeholder="Enter second number"
/>
<button onclick="calculate()" class="btn btn-primary mt-3">
Calculate Sum
</button>
</div>
</div>
<div class="col-sm-6">
<div class="p-4">
<h1 class="mb-4">Output</h1>
<div id="result" class="form-control"></div>
</div>
</div>
</div>
</div>
<div class="container">
<h1>Checkbox Container</h1>
<div class="row">
<div class="col-sm-2">
<div class="form-group">
<div class="form-check">
<input
class="form-check-input"
type="checkbox"
value=""
id="checkbox1"
/>
<label class="form-check-label" for="checkbox1">
Checkbox 1
</label>
</div>
<div class="form-check">
<input
class="form-check-input"
type="checkbox"
value=""
id="checkbox2"
/>
<label class="form-check-label" for="checkbox2">
Checkbox 2
</label>
</div>
<div class="form-check">
<input
class="form-check-input"
type="checkbox"
value=""
id="checkbox3"
/>
<label class="form-check-label" for="checkbox3">
Checkbox 3
</label>
</div>
</div>
</div>
<div class="col-sm-4">
<div class="form-group">
<div class="form-check">
<input
class="form-check-input"
type="checkbox"
value=""
id="checkbox4"
/>
<label class="form-check-label" for="checkbox4">
Checkbox 4
</label>
</div>
<div class="form-check">
<input
class="form-check-input"
type="checkbox"
value=""
id="checkbox5"
/>
<label class="form-check-label" for="checkbox5">
Checkbox 5
</label>
</div>
<div class="form-check">
<input
class="form-check-input"
type="checkbox"
value=""
id="checkbox6"
/>
<label class="form-check-label" for="checkbox6">
Checkbox 6
</label>
</div>
</div>
</div>
</div>
</div>
<script src="index.js" defer></script>
</body>
</html>

17
index.js
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@ -1,16 +1,9 @@
function calculateResult() {
var numberInput = parseInt(document.getElementById("numberInput").value);
var result = Module.ccall("myFunction", "number", ["number"], [numberInput]);
document.getElementById("output").innerText = "Result: " + result;
var input = document.getElementById("numberInput").value;
var result = Module.myFunction(input)
document.getElementById("output").innerText = result;
}
// document
// .getElementById("calculateBtn")
// .addEventListener("click", calculateResult);
function calculate() {
var a = parseInt(document.getElementById("input1").value);
var b = parseInt(document.getElementById("input2").value);
var result = Module.ccall("add", "number", ["number", "number"], [a, b]);
document.getElementById("result").innerText = "Result: " + result;
}
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