Initial commit

1 files changed, 87 insertions, 0 deletions

diff --git a/src/io.hh b/src/io.hh
new file mode 100644
index 0000000..abd91fa
--- /dev/null
+++ b/src/io.hh
@@ -0,0 +1,87 @@
+#ifndef IO_HH
+#define IO_HH
+
+#include <stddef.h>
+
+namespace io {
+
+class pipe {
+public:
+  pipe();
+  pipe(pipe&& pipe);
+  ~pipe();
+
+  pipe& operator=(pipe&& pipe) {
+    reset();
+    swap(pipe);
+    return *this;
+  }
+
+  bool open();
+  explicit operator bool() const {
+    return read() != -1;
+  }
+
+  void reset();
+
+  void swap(pipe& pipe);
+
+  int read() const {
+    return fd_[0];
+  }
+  int write() const {
+    return fd_[1];
+  }
+
+private:
+  pipe(pipe const&) = delete;
+  pipe& operator=(pipe const&) = delete;
+
+  int fd_[2];
+};
+
+class unique_fd {
+public:
+  unique_fd();
+  explicit unique_fd(int fd);
+  unique_fd(unique_fd&& fd);
+  ~unique_fd();
+
+  unique_fd& operator=(unique_fd&& fd) {
+    reset();
+    swap(fd);
+    return *this;
+  }
+
+  int get() const {
+    return fd_;
+  }
+
+  explicit operator bool() const {
+    return get() != -1;
+  }
+
+  void reset();
+  void reset(int fd);
+
+  void swap(unique_fd& fd);
+
+  int release();
+
+private:
+  unique_fd(unique_fd const& fd) = delete;
+  unique_fd& operator=(unique_fd const& fd) = delete;
+
+  int fd_;
+};
+
+bool read(pipe const& pipe, void* dst, size_t max, size_t* got = nullptr);
+bool write(pipe const& pipe, void const* src, size_t size,
+           size_t* wrote = nullptr);
+bool read(unique_fd const& fd, void* dst, size_t max, size_t* got = nullptr);
+bool write(unique_fd const& fd, void const* src, size_t size,
+           size_t* wrote = nullptr);
+
+}  // namespace
+
+#endif  // IO_HH