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-rw-r--r--src/SocketError.hxx156
1 files changed, 156 insertions, 0 deletions
diff --git a/src/SocketError.hxx b/src/SocketError.hxx
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+++ b/src/SocketError.hxx
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+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_SOCKET_ERROR_HXX
+#define MPD_SOCKET_ERROR_HXX
+
+#include "gcc.h"
+
+#include <glib.h>
+
+#ifdef WIN32
+#include <winsock2.h>
+typedef DWORD socket_error_t;
+#else
+#include <errno.h>
+typedef int socket_error_t;
+#endif
+
+/**
+ * A GQuark for GError for socket I/O errors. The code is an errno
+ * value (or WSAGetLastError() on Windows).
+ */
+gcc_const
+static inline GQuark
+SocketErrorQuark(void)
+{
+ return g_quark_from_static_string("socket");
+}
+
+gcc_pure
+static inline socket_error_t
+GetSocketError()
+{
+#ifdef WIN32
+ return WSAGetLastError();
+#else
+ return errno;
+#endif
+}
+
+gcc_const
+static inline bool
+IsSocketErrorAgain(socket_error_t code)
+{
+#ifdef WIN32
+ return code == WSAEINPROGRESS;
+#else
+ return code == EAGAIN;
+#endif
+}
+
+gcc_const
+static inline bool
+IsSocketErrorInterruped(socket_error_t code)
+{
+#ifdef WIN32
+ return code == WSAEINTR;
+#else
+ return code == EINTR;
+#endif
+}
+
+gcc_const
+static inline bool
+IsSocketErrorClosed(socket_error_t code)
+{
+#ifdef WIN32
+ return code == WSAECONNRESET;
+#else
+ return code == EPIPE || code == ECONNRESET;
+#endif
+}
+
+/**
+ * Helper class that formats a socket error message into a
+ * human-readable string. On Windows, a buffer is necessary for this,
+ * and this class hosts the buffer.
+ */
+class SocketErrorMessage {
+#ifdef WIN32
+ char msg[256];
+#else
+ const char *const msg;
+#endif
+
+public:
+#ifdef WIN32
+ explicit SocketErrorMessage(socket_error_t code=GetSocketError()) {
+ DWORD nbytes = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
+ FORMAT_MESSAGE_IGNORE_INSERTS |
+ FORMAT_MESSAGE_MAX_WIDTH_MASK,
+ NULL, code, 0,
+ (LPSTR)msg, sizeof(msg), NULL);
+ if (nbytes == 0)
+ strcpy(msg, "Unknown error");
+ }
+#else
+ explicit SocketErrorMessage(socket_error_t code=GetSocketError())
+ :msg(g_strerror(code)) {}
+#endif
+
+ operator const char *() const {
+ return msg;
+ }
+};
+
+static inline void
+SetSocketError(GError **error_r, socket_error_t code)
+{
+#ifdef WIN32
+ if (error_r == NULL)
+ return;
+#endif
+
+ const SocketErrorMessage msg(code);
+ g_set_error_literal(error_r, SocketErrorQuark(), code, msg);
+}
+
+static inline void
+SetSocketError(GError **error_r)
+{
+ SetSocketError(error_r, GetSocketError());
+}
+
+gcc_malloc
+static inline GError *
+NewSocketError(socket_error_t code)
+{
+ const SocketErrorMessage msg(code);
+ return g_error_new_literal(SocketErrorQuark(), code, msg);
+}
+
+gcc_malloc
+static inline GError *
+NewSocketError()
+{
+ return NewSocketError(GetSocketError());
+}
+
+#endif