This has been used/tested with Duktape 2.3.x on:
- Ubuntu 18.10 x64
- Windows 7 x86 & x64
To run uppercase example:
dub run duktape:uppercase -- "this is a test"
On Windows you should add --arch=x86_mscoff for 32-bit builds or --arch=x86_64 for 64-bit builds because the included binary files are in MS-COFF format.
dub run --arch=x86_64 duktape:uppercase -- "this is a test"
For more information about Duktape check out its official website: http://duktape.org/
// primecheck.d
import std.conv;
import std.stdio;
import std.string;
import duktape;
import duk_extras.print_alert;
import duk_extras.v1_compat;
extern (C) duk_ret_t native_prime_check(duk_context *ctx) {
int val = duk_require_int(ctx, 0);
int lim = duk_require_int(ctx, 1);
int i;
for (i = 2; i <= lim; i++) {
if (val % i == 0) {
duk_push_false(ctx);
return 1;
}
}
duk_push_true(ctx);
return 1;
}
int main() {
duk_context *ctx = duk_create_heap_default();
if (!ctx) {
writeln("Failed to create a Duktape heap.");
return 1;
}
scope(exit) duk_destroy_heap(ctx);
duk_push_global_object(ctx);
duk_print_alert_init(ctx, 0);
duk_push_c_function(ctx, &native_prime_check, 2 /*nargs*/);
duk_put_prop_string(ctx, -2, "primeCheckNative");
if (duk_peval_file(ctx, "prime.js") != 0) {
writef("Error: %s\n", duk_safe_to_string(ctx, -1).to!string);
return 0;
}
duk_pop(ctx); /* ignore result */
duk_get_prop_string(ctx, -1, "primeTest");
if (duk_pcall(ctx, 0) != 0) {
writef("Error: %s\n", duk_safe_to_string(ctx, -1).to!string);
}
duk_pop(ctx); /* ignore result */
return 0;
}// prime.js
// Pure Ecmascript version of low level helper
function primeCheckEcmascript(val, limit) {
for (var i = 2; i <= limit; i++) {
if ((val % i) == 0) { return false; }
}
return true;
}
// Select available helper at load time
var primeCheckHelper = (this.primeCheckNative || primeCheckEcmascript);
// Check 'val' for primality
function primeCheck(val) {
if (val == 1 || val == 2) { return true; }
var limit = Math.ceil(Math.sqrt(val));
while (limit * limit < val) { limit += 1; }
return primeCheckHelper(val, limit);
}
// Find primes below one million ending in '9999'.
function primeTest() {
var res = [];
print('Have native helper: ' + (primeCheckHelper !== primeCheckEcmascript));
for (var i = 1; i < 1000000; i++) {
if (primeCheck(i) && (i % 10000) == 9999) { res.push(i); }
}
print(res.join(' '));
}
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