Dia antes primera install

node_modules/i2c-bus/src/sendbyte.cc

@@ -0,0 +1,68 @@
+#include <errno.h>
+#include <node.h>
+#include <nan.h>
+#include "./i2c-dev.h"
+#include "./sendbyte.h"
+#include "./util.h"
+
+static __s32 SendByte(int fd, __u8 byte) {
+  return i2c_smbus_write_byte(fd, byte);
+}
+
+class SendByteWorker : public I2cAsyncWorker {
+public:
+  SendByteWorker(Nan::Callback *callback, int fd, __u8 byte)
+    : I2cAsyncWorker(callback), fd(fd), byte(byte) {}
+  ~SendByteWorker() {}
+
+  void Execute() {
+    __s32 ret = SendByte(fd, byte);
+    if (ret == -1) {
+      SetErrorNo(errno);
+      SetErrorSyscall("sendByte");
+    }
+  }
+
+  void HandleOKCallback() {
+    Nan::HandleScope scope;
+
+    v8::Local<v8::Value> argv[] = {
+      Nan::Null()
+    };
+
+    callback->Call(1, argv, async_resource);
+  }
+
+private:
+  int fd;
+  __u8 byte;
+};
+
+NAN_METHOD(SendByteAsync) {
+  if (info.Length() < 3 || !info[0]->IsInt32() || !info[1]->IsInt32() || !info[2]->IsFunction()) {
+    return Nan::ThrowError(Nan::ErrnoException(EINVAL, "sendByte",
+      "incorrect arguments passed to sendByte(int fd, int byte, function cb)"));
+  }
+
+  int fd = Nan::To<int32_t>(info[0]).FromJust();
+  __u8 byte = Nan::To<int32_t>(info[1]).FromJust();
+  Nan::Callback *callback = new Nan::Callback(info[2].As<v8::Function>());
+
+  Nan::AsyncQueueWorker(new SendByteWorker(callback, fd, byte));
+}
+
+NAN_METHOD(SendByteSync) {
+  if (info.Length() < 2 || !info[0]->IsInt32() || !info[1]->IsInt32()) {
+    return Nan::ThrowError(Nan::ErrnoException(EINVAL, "sendByteSync",
+      "incorrect arguments passed to sendByteSync(int fd, int byte)"));
+  }
+
+  int fd = Nan::To<int32_t>(info[0]).FromJust();
+  __u8 byte = Nan::To<int32_t>(info[1]).FromJust();
+
+  __s32 ret = SendByte(fd, byte);
+  if (ret == -1) {
+    return Nan::ThrowError(Nan::ErrnoException(errno, "sendByteSync", ""));
+  }
+}
+