47 lines
1,008 B
C
47 lines
1,008 B
C
/*
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* Very simple example program
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*/
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#include "duktape.h"
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static duk_ret_t native_print(duk_context *ctx) {
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duk_push_string(ctx, " ");
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duk_insert(ctx, 0);
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duk_join(ctx, duk_get_top(ctx) - 1);
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printf("%s\n", duk_safe_to_string(ctx, -1));
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return 0;
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}
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static duk_ret_t native_adder(duk_context *ctx) {
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int i;
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int n = duk_get_top(ctx); /* #args */
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double res = 0.0;
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for (i = 0; i < n; i++) {
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res += duk_to_number(ctx, i);
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}
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duk_push_number(ctx, res);
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return 1; /* one return value */
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}
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int main(int argc, char *argv[]) {
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duk_context *ctx = duk_create_heap_default();
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(void) argc; (void) argv; /* suppress warning */
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duk_push_c_function(ctx, native_print, DUK_VARARGS);
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duk_put_global_string(ctx, "print");
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duk_push_c_function(ctx, native_adder, DUK_VARARGS);
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duk_put_global_string(ctx, "adder");
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duk_eval_string(ctx, "print('Hello world!');");
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duk_eval_string(ctx, "print('2+3=' + adder(2, 3));");
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duk_pop(ctx); /* pop eval result */
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duk_destroy_heap(ctx);
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return 0;
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}
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