Create os_translate_sys_error()

Wrap up uv_translate_sys_error and fallbacks into a new function
os_translate_sys_error(). In windows a copy of the original
uv_translate_sys_error() was imported from libuv.

1 files changed, 126 insertions, 25 deletions

diff --git a/src/nvim/os/fs.c b/src/nvim/os/fs.c
index cd943c4843..e63b8b6793 100644
--- a/src/nvim/os/fs.c
+++ b/src/nvim/os/fs.c
@@ -399,14 +399,7 @@ ptrdiff_t os_read(const int fd, bool *ret_eof, char *const ret_buf,
       assert(read_bytes <= size);
     }
     if (cur_read_bytes < 0) {
-#ifdef HAVE_UV_TRANSLATE_SYS_ERROR
-      const int error = uv_translate_sys_error(errno);
-#else
-      const int error = -errno;
-      STATIC_ASSERT(-EINTR == UV_EINTR, "Need to translate error codes");
-      STATIC_ASSERT(-EAGAIN == UV_EAGAIN, "Need to translate error codes");
-      STATIC_ASSERT(-ENOMEM == UV_ENOMEM, "Need to translate error codes");
-#endif
+      const int error = os_translate_sys_error(errno);
       errno = 0;
       if (error == UV_EINTR || error == UV_EAGAIN) {
         continue;
@@ -469,14 +462,7 @@ ptrdiff_t os_readv(int fd, bool *ret_eof, struct iovec *iov, size_t iov_size)
         }
       }
     } else if (cur_read_bytes < 0) {
-#ifdef HAVE_UV_TRANSLATE_SYS_ERROR
-      const int error = uv_translate_sys_error(errno);
-#else
-      const int error = -errno;
-      STATIC_ASSERT(-EINTR == UV_EINTR, "Need to translate error codes");
-      STATIC_ASSERT(-EAGAIN == UV_EAGAIN, "Need to translate error codes");
-      STATIC_ASSERT(-ENOMEM == UV_ENOMEM, "Need to translate error codes");
-#endif
+      const int error = os_translate_sys_error(errno);
       errno = 0;
       if (error == UV_EINTR || error == UV_EAGAIN) {
         continue;
@@ -515,15 +501,7 @@ ptrdiff_t os_write(const int fd, const char *const buf, const size_t size)
       written_bytes += (size_t)cur_written_bytes;
     }
     if (cur_written_bytes < 0) {
-#ifdef HAVE_UV_TRANSLATE_SYS_ERROR
-      const int error = uv_translate_sys_error(errno);
-#else
-      const int error = -errno;
-      STATIC_ASSERT(-EINTR == UV_EINTR, "Need to translate error codes");
-      STATIC_ASSERT(-EAGAIN == UV_EAGAIN, "Need to translate error codes");
-      // According to the man page open() may fail with ENOMEM, but write()
-      // can’t.
-#endif
+      const int error = os_translate_sys_error(errno);
       errno = 0;
       if (error == UV_EINTR || error == UV_EAGAIN) {
         continue;
@@ -1023,3 +1001,126 @@ shortcut_end:
 }
 
 #endif
+
+int os_translate_sys_error(int sys_errno) {
+#ifdef HAVE_UV_TRANSLATE_SYS_ERROR
+  return uv_translate_sys_error(sys_errno);
+#elif WIN32
+  // TODO(equalsraf): libuv does not yet expose uv_translate_sys_error()
+  // in its public API, include a version here until it can be used.
+  // See https://github.com/libuv/libuv/issues/79
+# ifndef ERROR_SYMLINK_NOT_SUPPORTED
+#  define ERROR_SYMLINK_NOT_SUPPORTED 1464
+# endif
+
+  if (sys_errno <= 0) {
+    return sys_errno;  // If < 0 then it's already a libuv error
+  }
+
+  switch (sys_errno) {
+    case ERROR_NOACCESS:                    return UV_EACCES;
+    case WSAEACCES:                         return UV_EACCES;
+    case ERROR_ADDRESS_ALREADY_ASSOCIATED:  return UV_EADDRINUSE;
+    case WSAEADDRINUSE:                     return UV_EADDRINUSE;
+    case WSAEADDRNOTAVAIL:                  return UV_EADDRNOTAVAIL;
+    case WSAEAFNOSUPPORT:                   return UV_EAFNOSUPPORT;
+    case WSAEWOULDBLOCK:                    return UV_EAGAIN;
+    case WSAEALREADY:                       return UV_EALREADY;
+    case ERROR_INVALID_FLAGS:               return UV_EBADF;
+    case ERROR_INVALID_HANDLE:              return UV_EBADF;
+    case ERROR_LOCK_VIOLATION:              return UV_EBUSY;
+    case ERROR_PIPE_BUSY:                   return UV_EBUSY;
+    case ERROR_SHARING_VIOLATION:           return UV_EBUSY;
+    case ERROR_OPERATION_ABORTED:           return UV_ECANCELED;
+    case WSAEINTR:                          return UV_ECANCELED;
+    case ERROR_NO_UNICODE_TRANSLATION:      return UV_ECHARSET;
+    case ERROR_CONNECTION_ABORTED:          return UV_ECONNABORTED;
+    case WSAECONNABORTED:                   return UV_ECONNABORTED;
+    case ERROR_CONNECTION_REFUSED:          return UV_ECONNREFUSED;
+    case WSAECONNREFUSED:                   return UV_ECONNREFUSED;
+    case ERROR_NETNAME_DELETED:             return UV_ECONNRESET;
+    case WSAECONNRESET:                     return UV_ECONNRESET;
+    case ERROR_ALREADY_EXISTS:              return UV_EEXIST;
+    case ERROR_FILE_EXISTS:                 return UV_EEXIST;
+    case ERROR_BUFFER_OVERFLOW:             return UV_EFAULT;
+    case WSAEFAULT:                         return UV_EFAULT;
+    case ERROR_HOST_UNREACHABLE:            return UV_EHOSTUNREACH;
+    case WSAEHOSTUNREACH:                   return UV_EHOSTUNREACH;
+    case ERROR_INSUFFICIENT_BUFFER:         return UV_EINVAL;
+    case ERROR_INVALID_DATA:                return UV_EINVAL;
+    case ERROR_INVALID_PARAMETER:           return UV_EINVAL;
+    case ERROR_SYMLINK_NOT_SUPPORTED:       return UV_EINVAL;
+    case WSAEINVAL:                         return UV_EINVAL;
+    case WSAEPFNOSUPPORT:                   return UV_EINVAL;
+    case WSAESOCKTNOSUPPORT:                return UV_EINVAL;
+    case ERROR_BEGINNING_OF_MEDIA:          return UV_EIO;
+    case ERROR_BUS_RESET:                   return UV_EIO;
+    case ERROR_CRC:                         return UV_EIO;
+    case ERROR_DEVICE_DOOR_OPEN:            return UV_EIO;
+    case ERROR_DEVICE_REQUIRES_CLEANING:    return UV_EIO;
+    case ERROR_DISK_CORRUPT:                return UV_EIO;
+    case ERROR_EOM_OVERFLOW:                return UV_EIO;
+    case ERROR_FILEMARK_DETECTED:           return UV_EIO;
+    case ERROR_GEN_FAILURE:                 return UV_EIO;
+    case ERROR_INVALID_BLOCK_LENGTH:        return UV_EIO;
+    case ERROR_IO_DEVICE:                   return UV_EIO;
+    case ERROR_NO_DATA_DETECTED:            return UV_EIO;
+    case ERROR_NO_SIGNAL_SENT:              return UV_EIO;
+    case ERROR_OPEN_FAILED:                 return UV_EIO;
+    case ERROR_SETMARK_DETECTED:            return UV_EIO;
+    case ERROR_SIGNAL_REFUSED:              return UV_EIO;
+    case WSAEISCONN:                        return UV_EISCONN;
+    case ERROR_CANT_RESOLVE_FILENAME:       return UV_ELOOP;
+    case ERROR_TOO_MANY_OPEN_FILES:         return UV_EMFILE;
+    case WSAEMFILE:                         return UV_EMFILE;
+    case WSAEMSGSIZE:                       return UV_EMSGSIZE;
+    case ERROR_FILENAME_EXCED_RANGE:        return UV_ENAMETOOLONG;
+    case ERROR_NETWORK_UNREACHABLE:         return UV_ENETUNREACH;
+    case WSAENETUNREACH:                    return UV_ENETUNREACH;
+    case WSAENOBUFS:                        return UV_ENOBUFS;
+    case ERROR_BAD_PATHNAME:                return UV_ENOENT;
+    case ERROR_DIRECTORY:                   return UV_ENOENT;
+    case ERROR_FILE_NOT_FOUND:              return UV_ENOENT;
+    case ERROR_INVALID_NAME:                return UV_ENOENT;
+    case ERROR_INVALID_DRIVE:               return UV_ENOENT;
+    case ERROR_INVALID_REPARSE_DATA:        return UV_ENOENT;
+    case ERROR_MOD_NOT_FOUND:               return UV_ENOENT;
+    case ERROR_PATH_NOT_FOUND:              return UV_ENOENT;
+    case WSAHOST_NOT_FOUND:                 return UV_ENOENT;
+    case WSANO_DATA:                        return UV_ENOENT;
+    case ERROR_NOT_ENOUGH_MEMORY:           return UV_ENOMEM;
+    case ERROR_OUTOFMEMORY:                 return UV_ENOMEM;
+    case ERROR_CANNOT_MAKE:                 return UV_ENOSPC;
+    case ERROR_DISK_FULL:                   return UV_ENOSPC;
+    case ERROR_EA_TABLE_FULL:               return UV_ENOSPC;
+    case ERROR_END_OF_MEDIA:                return UV_ENOSPC;
+    case ERROR_HANDLE_DISK_FULL:            return UV_ENOSPC;
+    case ERROR_NOT_CONNECTED:               return UV_ENOTCONN;
+    case WSAENOTCONN:                       return UV_ENOTCONN;
+    case ERROR_DIR_NOT_EMPTY:               return UV_ENOTEMPTY;
+    case WSAENOTSOCK:                       return UV_ENOTSOCK;
+    case ERROR_NOT_SUPPORTED:               return UV_ENOTSUP;
+    case ERROR_BROKEN_PIPE:                 return UV_EOF;
+    case ERROR_ACCESS_DENIED:               return UV_EPERM;
+    case ERROR_PRIVILEGE_NOT_HELD:          return UV_EPERM;
+    case ERROR_BAD_PIPE:                    return UV_EPIPE;
+    case ERROR_NO_DATA:                     return UV_EPIPE;
+    case ERROR_PIPE_NOT_CONNECTED:          return UV_EPIPE;
+    case WSAESHUTDOWN:                      return UV_EPIPE;
+    case WSAEPROTONOSUPPORT:                return UV_EPROTONOSUPPORT;
+    case ERROR_WRITE_PROTECT:               return UV_EROFS;
+    case ERROR_SEM_TIMEOUT:                 return UV_ETIMEDOUT;
+    case WSAETIMEDOUT:                      return UV_ETIMEDOUT;
+    case ERROR_NOT_SAME_DEVICE:             return UV_EXDEV;
+    case ERROR_INVALID_FUNCTION:            return UV_EISDIR;
+    case ERROR_META_EXPANSION_TOO_LONG:     return UV_E2BIG;
+    default:                                return UV_UNKNOWN;
+  }
+#else
+  const int error = -errno;
+  STATIC_ASSERT(-EINTR == UV_EINTR, "Need to translate error codes");
+  STATIC_ASSERT(-EAGAIN == UV_EAGAIN, "Need to translate error codes");
+  STATIC_ASSERT(-ENOMEM == UV_ENOMEM, "Need to translate error codes");
+  return error;
+#endif
+}