static void fileReadBytesCallback(uv_fs_t* request)
{
if (handleRequestError(request)) return;
FileRequestData* data = (FileRequestData*)request->data;
uv_buf_t buffer = data->buffer;
size_t count = request->result;
// TODO: Having to copy the bytes here is a drag. It would be good if Wren's
// embedding API supported a way to *give* it bytes that were previously
// allocated using Wren's own allocator.
schedulerResume(freeRequest(request), true);
wrenSetSlotBytes(getVM(), 2, buffer.base, count);
schedulerFinishResume();
// TODO: Likewise, freeing this after we resume is lame.
free(buffer.base);
}
static void stdinReadCallback(uv_stream_t* stream, ssize_t numRead,
const uv_buf_t* buffer)
{
WrenVM* vm = getVM();
if (stdinClass == NULL)
{
wrenEnsureSlots(vm, 1);
wrenGetVariable(vm, "io", "Stdin", 0);
stdinClass = wrenGetSlotValue(vm, 0);
}
if (stdinOnData == NULL)
{
stdinOnData = wrenMakeCallHandle(vm, "onData_(_)");
}
// If stdin was closed, send null to let io.wren know.
if (numRead == UV_EOF)
{
wrenEnsureSlots(vm, 2);
wrenSetSlotValue(vm, 0, stdinClass);
wrenSetSlotNull(vm, 1);
wrenCall(vm, stdinOnData);
shutdownStdin();
return;
}
// TODO: Handle other errors.
// TODO: Having to copy the bytes here is a drag. It would be good if Wren's
// embedding API supported a way to *give* it bytes that were previously
// allocated using Wren's own allocator.
wrenEnsureSlots(vm, 2);
wrenSetSlotValue(vm, 0, stdinClass);
wrenSetSlotBytes(vm, 1, buffer->base, numRead);
wrenCall(vm, stdinOnData);
// TODO: Likewise, freeing this after we resume is lame.
free(buffer->base);
}
static void setSlots(WrenVM* vm)
{
WrenHandle* handle = wrenGetSlotHandle(vm, 1);
wrenSetSlotBool(vm, 1, true);
wrenSetSlotBytes(vm, 2, "by\0te", 5);
wrenSetSlotDouble(vm, 3, 1.5);
wrenSetSlotString(vm, 4, "str");
// TODO: wrenSetSlotNull().
// Read the slots back to make sure they were set correctly.
bool result = true;
if (wrenGetSlotBool(vm, 1) != true) result = false;
int length;
const char* bytes = wrenGetSlotBytes(vm, 2, &length);
if (length != 5) result = false;
if (memcmp(bytes, "by\0te", length) != 0) result = false;
if (wrenGetSlotDouble(vm, 3) != 1.5) result = false;
if (strcmp(wrenGetSlotString(vm, 4), "str") != 0) result = false;
if (result)
{
// Move the value into the return position.
wrenSetSlotHandle(vm, 0, handle);
}
else
{
// If anything failed, return false.
wrenSetSlotBool(vm, 0, false);
}
wrenReleaseHandle(vm, handle);
}
void callRunTests(WrenVM* vm)
{
wrenEnsureSlots(vm, 1);
wrenGetVariable(vm, "main", "Call", 0);
WrenValue* callClass = wrenGetSlotValue(vm, 0);
WrenValue* noParams = wrenMakeCallHandle(vm, "noParams");
WrenValue* zero = wrenMakeCallHandle(vm, "zero()");
WrenValue* one = wrenMakeCallHandle(vm, "one(_)");
WrenValue* two = wrenMakeCallHandle(vm, "two(_,_)");
// Different arity.
wrenEnsureSlots(vm, 1);
wrenSetSlotValue(vm, 0, callClass);
wrenCall(vm, noParams);
wrenEnsureSlots(vm, 1);
wrenSetSlotValue(vm, 0, callClass);
wrenCall(vm, zero);
wrenEnsureSlots(vm, 2);
wrenSetSlotValue(vm, 0, callClass);
wrenSetSlotDouble(vm, 1, 1.0);
wrenCall(vm, one);
wrenEnsureSlots(vm, 3);
wrenSetSlotValue(vm, 0, callClass);
wrenSetSlotDouble(vm, 1, 1.0);
wrenSetSlotDouble(vm, 2, 2.0);
wrenCall(vm, two);
// Returning a value.
WrenValue* getValue = wrenMakeCallHandle(vm, "getValue()");
wrenEnsureSlots(vm, 1);
wrenSetSlotValue(vm, 0, callClass);
wrenCall(vm, getValue);
WrenValue* value = wrenGetSlotValue(vm, 0);
// Different argument types.
wrenEnsureSlots(vm, 3);
wrenSetSlotValue(vm, 0, callClass);
wrenSetSlotBool(vm, 1, true);
wrenSetSlotBool(vm, 2, false);
wrenCall(vm, two);
wrenEnsureSlots(vm, 3);
wrenSetSlotValue(vm, 0, callClass);
wrenSetSlotDouble(vm, 1, 1.2);
wrenSetSlotDouble(vm, 2, 3.4);
wrenCall(vm, two);
wrenEnsureSlots(vm, 3);
wrenSetSlotValue(vm, 0, callClass);
wrenSetSlotString(vm, 1, "string");
wrenSetSlotString(vm, 2, "another");
wrenCall(vm, two);
wrenEnsureSlots(vm, 3);
wrenSetSlotValue(vm, 0, callClass);
wrenSetSlotNull(vm, 1);
wrenSetSlotValue(vm, 2, value);
wrenCall(vm, two);
// Truncate a string, or allow null bytes.
wrenEnsureSlots(vm, 3);
wrenSetSlotValue(vm, 0, callClass);
wrenSetSlotBytes(vm, 1, "string", 3);
wrenSetSlotBytes(vm, 2, "b\0y\0t\0e", 7);
wrenCall(vm, two);
// Call ignores with extra temporary slots on stack.
wrenEnsureSlots(vm, 10);
wrenSetSlotValue(vm, 0, callClass);
for (int i = 1; i < 10; i++)
{
wrenSetSlotDouble(vm, i, i * 0.1);
}
wrenCall(vm, one);
wrenReleaseValue(vm, callClass);
wrenReleaseValue(vm, noParams);
wrenReleaseValue(vm, zero);
wrenReleaseValue(vm, one);
wrenReleaseValue(vm, two);
wrenReleaseValue(vm, getValue);
wrenReleaseValue(vm, value);
}
