A bare-bones Lua interpreter, in C.

lua_interp.c

// A bare-bones Lua interpreter, in C.

#include <stdio.h>
#include <string.h>

#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"

int main() {
  
    // Start our Lua run-time state and load the standard libraries.
    lua_State *L = luaL_newstate();
    luaL_openlibs(L);
  
    // Read-parse(load)-evaluate(call). In a loop.
    char buff[2048];
    while ((fgets(buff, sizeof(buff), stdin))) {
        luaL_loadstring(L, buff);
        lua_pcall(L, 0, 0, 0);
    }
  
    // Clean up the lua run-time state and exit.
    lua_close(L);
    return 0;
}