# HG changeset patch
# User Sara
# Date 1386959132 28800
# Node ID 299e986f325086b3b197ce3e774ae0c86ea848ed

This the minimal example

diff -r 000000000000 -r 299e986f3250 helloworld.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/helloworld.cpp	Fri Dec 13 10:25:32 2013 -0800
@@ -0,0 +1,91 @@
+
+
+/* Include the JSAPI header file to get access to SpiderMonkey. */
+#include "jsapi.h"
+
+/* The class of the global object. */
+static JSClass global_class = {
+    "global", JSCLASS_GLOBAL_FLAGS,
+    JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
+    JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
+    JSCLASS_NO_OPTIONAL_MEMBERS
+};
+
+/* The error reporter callback. */
+void reportError(JSContext *cx, const char *message, JSErrorReport *report)
+{
+    fprintf(stderr, "%s:%u:%s\n",
+            report->filename ? report->filename : "<no filename=\"filename\">",
+            (unsigned int) report->lineno,
+            message);
+}
+
+int main(int argc, const char *argv[])
+{
+    /* JSAPI variables. */
+    JSRuntime *rt;
+    JSContext *cx;
+    JSObject  *global;
+
+    /* Create a JS runtime. You always need at least one runtime per process. */
+    rt = JS_NewRuntime(8 * 1024 * 1024);
+    if (rt == NULL)
+        return 1;
+
+    /* 
+     * Create a context. You always need a context per thread.
+     * Note that this program is not multi-threaded.
+     */
+    cx = JS_NewContext(rt, 8192);
+    if (cx == NULL)
+        return 1;
+    JS_SetOptions(cx, JSOPTION_VAROBJFIX | JSOPTION_JIT | JSOPTION_METHODJIT);
+    JS_SetVersion(cx, JSVERSION_LATEST);
+    JS_SetErrorReporter(cx, reportError);
+
+    /*
+     * Create the global object in a new compartment.
+     * You always need a global object per context.
+     */
+    global = JS_NewCompartmentAndGlobalObject(cx, &global_class, NULL);
+    if (global == NULL)
+        return 1;
+
+    /*
+     * Populate the global object with the standard JavaScript
+     * function and object classes, such as Object, Array, Date.
+     */
+    if (!JS_InitStandardClasses(cx, global))
+        return 1;
+
+    /* Your application code here. This may include JSAPI calls
+     * to create your own custom JavaScript objects and to run scripts.
+     *
+     * The following example code creates a literal JavaScript script,
+     * evaluates it, and prints the result to stdout.
+     *
+     * Errors are conventionally saved in a JSBool variable named ok.
+     */
+    const char *script = "'Hello ' + 'World!'";
+    jsval rval;
+    JSString *str;
+    JSBool ok;
+    const char *filename = "noname";
+    uintN lineno = 0;
+
+    ok = JS_EvaluateScript(cx, global, script, strlen(script),
+                           filename, lineno, &rval);
+    if ( rval == JS_FALSE)//rval == JS_NULL |
+        return 1;
+
+    str = JS_ValueToString(cx, rval);
+    printf("%s\n", JS_EncodeString(cx, str));
+
+    /* End of your application code */
+
+    /* Clean things up and shut down SpiderMonkey. */
+    JS_DestroyContext(cx);
+    JS_DestroyRuntime(rt);
+    JS_ShutDown();
+    return 0;
+}