Add quickjs-2021-03-27 to third_party

third_party/quickjs/examples/fib.c

@@ -0,0 +1,72 @@
+/*
+ * QuickJS: Example of C module
+ * 
+ * Copyright (c) 2017-2018 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "../quickjs.h"
+
+#define countof(x) (sizeof(x) / sizeof((x)[0]))
+
+static int fib(int n)
+{
+    if (n <= 0)
+        return 0;
+    else if (n == 1)
+        return 1;
+    else
+        return fib(n - 1) + fib(n - 2);
+}
+
+static JSValue js_fib(JSContext *ctx, JSValueConst this_val,
+                      int argc, JSValueConst *argv)
+{
+    int n, res;
+    if (JS_ToInt32(ctx, &n, argv[0]))
+        return JS_EXCEPTION;
+    res = fib(n);
+    return JS_NewInt32(ctx, res);
+}
+
+static const JSCFunctionListEntry js_fib_funcs[] = {
+    JS_CFUNC_DEF("fib", 1, js_fib ),
+};
+
+static int js_fib_init(JSContext *ctx, JSModuleDef *m)
+{
+    return JS_SetModuleExportList(ctx, m, js_fib_funcs,
+                                  countof(js_fib_funcs));
+}
+
+#ifdef JS_SHARED_LIBRARY
+#define JS_INIT_MODULE js_init_module
+#else
+#define JS_INIT_MODULE js_init_module_fib
+#endif
+
+JSModuleDef *JS_INIT_MODULE(JSContext *ctx, const char *module_name)
+{
+    JSModuleDef *m;
+    m = JS_NewCModule(ctx, module_name, js_fib_init);
+    if (!m)
+        return NULL;
+    JS_AddModuleExportList(ctx, m, js_fib_funcs, countof(js_fib_funcs));
+    return m;
+}