82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* primecheck.c */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "duktape.h"
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/* For brevity assumes a maximum file length of 16kB. */
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static void push_file_as_string(duk_context *ctx, const char *filename) {
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FILE *f;
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size_t len;
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char buf[16384];
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f = fopen(filename, "rb");
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if (f) {
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len = fread((void *) buf, 1, sizeof(buf), f);
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fclose(f);
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duk_push_lstring(ctx, (const char *) buf, (duk_size_t) len);
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} else {
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duk_push_undefined(ctx);
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}
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}
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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_to_string(ctx, -1));
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return 0;
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}
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static duk_ret_t native_prime_check(duk_context *ctx) {
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int val = duk_require_int(ctx, 0);
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int lim = duk_require_int(ctx, 1);
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int i;
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for (i = 2; i <= lim; i++) {
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if (val % i == 0) {
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duk_push_false(ctx);
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return 1;
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}
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}
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duk_push_true(ctx);
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return 1;
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}
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int main(int argc, const char *argv[]) {
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duk_context *ctx = NULL;
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(void) argc; (void) argv;
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ctx = duk_create_heap_default();
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if (!ctx) {
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printf("Failed to create a Duktape heap.\n");
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exit(1);
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}
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duk_push_global_object(ctx);
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duk_push_c_function(ctx, native_print, DUK_VARARGS);
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duk_put_prop_string(ctx, -2, "print");
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duk_push_c_function(ctx, native_prime_check, 2 /*nargs*/);
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duk_put_prop_string(ctx, -2, "primeCheckNative");
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push_file_as_string(ctx, "prime.js");
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if (duk_peval(ctx) != 0) {
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printf("Error running: %s\n", duk_safe_to_string(ctx, -1));
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goto finished;
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}
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duk_pop(ctx); /* ignore result */
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duk_get_prop_string(ctx, -1, "primeTest");
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if (duk_pcall(ctx, 0) != 0) {
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printf("Error: %s\n", duk_safe_to_string(ctx, -1));
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}
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duk_pop(ctx); /* ignore result */
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finished:
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duk_destroy_heap(ctx);
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exit(0);
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}
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