duktape-1.5.2/examples/hello/hello.c

Go to the documentation of this file.

/*
 *  Very simple example program
 */
 
#include "duktape.h"
 
int adder(duk_context *ctx) {
    int i;
    int n = duk_get_top(ctx);  /* #args */
    double res = 0.0;
 
    for (i = 0; i < n; i++) {
        res += duk_to_number(ctx, i);
    }
 
    duk_push_number(ctx, res);
    return 1;  /* one return value */
}
 
int main(int argc, char *argv[]) {
    duk_context *ctx = duk_create_heap_default();
 
    (void) argc; (void) argv;  /* suppress warning */
 
    duk_eval_string(ctx, "print('Hello world!');");
 
    duk_push_global_object(ctx);
    duk_push_c_function(ctx, adder, DUK_VARARGS);
    duk_put_prop_string(ctx, -2, "adder");
    duk_pop(ctx);  /* pop global */
 
    duk_eval_string(ctx, "print('2+3=' + adder(2, 3));");
    duk_pop(ctx);  /* pop eval result */
 
    duk_destroy_heap(ctx);
 
    return 0;
}