1/*
2 * QuickJS: Example of C module
3 *
4 * Copyright (c) 2017-2018 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24#include "../quickjs.h"
25
26#define countof(x) (sizeof(x) / sizeof((x)[0]))
27
28static int fib(int n)
29{
30 if (n <= 0)
31 return 0;
32 else if (n == 1)
33 return 1;
34 else
35 return fib(n - 1) + fib(n - 2);
36}
37
38static JSValue js_fib(JSContext *ctx, JSValueConst this_val,
39 int argc, JSValueConst *argv)
40{
41 int n, res;
42 if (JS_ToInt32(ctx, &n, argv[0]))
43 return JS_EXCEPTION;
44 res = fib(n);
45 return JS_NewInt32(ctx, res);
46}
47
48static const JSCFunctionListEntry js_fib_funcs[] = {
49 JS_CFUNC_DEF("fib", 1, js_fib ),
50};
51
52static int js_fib_init(JSContext *ctx, JSModuleDef *m)
53{
54 return JS_SetModuleExportList(ctx, m, js_fib_funcs,
55 countof(js_fib_funcs));
56}
57
58#ifdef JS_SHARED_LIBRARY
59#define JS_INIT_MODULE js_init_module
60#else
61#define JS_INIT_MODULE js_init_module_fib
62#endif
63
64JSModuleDef *JS_INIT_MODULE(JSContext *ctx, const char *module_name)
65{
66 JSModuleDef *m;
67 m = JS_NewCModule(ctx, module_name, js_fib_init);
68 if (!m)
69 return NULL;
70 JS_AddModuleExportList(ctx, m, js_fib_funcs, countof(js_fib_funcs));
71 return m;
72}
73