itspacedev / c_wasm Goto Github PK

git clone https://github.com/itspacedev/c_wasm.git

npm install

emcc hello_world.c -o index.html \
    -sEXPORTED_FUNCTIONS=_intSqrt,_addTwoNumbers,_returnString,_getStringLength \
    -sEXPORTED_RUNTIME_METHODS=ccall,cwrap,stringToNewUTF8,UTF8ToString

http-server .

Open in Chrome: http://127.0.0.1:8080/main.html (IP:PORT may be different for you)

#1. Get integer square root
intSqrt(33) =  5 

#2. Add two numbers
addTwoNumbers(4, 91) =  95 

#3. Return a string from C
returnString() =  This is the Wallet (type string) 

#4. Get string length
getStringLength("This is my long string") =  22