1 files changed, 143 insertions, 0 deletions
diff --git a/StdLib/LibC/Uefi/writev.c b/StdLib/LibC/Uefi/writev.c
new file mode 100644
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+++ b/StdLib/LibC/Uefi/writev.c
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+/*
+ * Copyright (c) 1999, 2000
+ * Intel Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this software must
+ *    display the following acknowledgement:
+ *
+ *    This product includes software developed by Intel Corporation and its
+ *    contributors.
+ *
+ * 4. Neither the name of Intel Corporation or its contributors may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*++
+
+Module Name:
+
+    writev.c
+
+Abstract:
+
+    Functions implementing the standard "writev" system call interface
+
+
+Revision History
+
+--*/
+#include  <LibConfig.h>
+
+#ifdef foo
+#include <efi_interface.h>
+#include <unistd.h>
+#include <fcntl.h>
+#define KERNEL
+#include <errno.h>
+#undef KERNEL
+#include "./filedesc.h"
+
+#include <libc_debug.h>
+#include <assert.h>
+#endif
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/uio.h>
+#include <string.h>
+#ifndef KERNEL
+#define KERNEL
+#include <errno.h>
+#undef KERNEL
+#else
+#include <errno.h>
+#endif
+
+//
+//  Name:
+//      writev
+//
+//  Description:
+//      BSD writev interface for libc
+//
+//  Arguments:
+//      File Descriptor (index into file descriptor table)
+//      iovec pointer
+//      size of iovec array
+//
+//  Returns:
+//      number of bytes written
+//
+
+ssize_t
+writev(
+    int fd,
+    const struct iovec *iov,
+    int iovcnt
+    )
+{
+  const struct iovec  *pVecTmp;
+  char      *pBuf, *pBufTmp;
+  size_t      TotalBytes, i, ret;
+
+  //
+  //  See how much memory we'll need
+  //
+
+  for (i = 0, TotalBytes = 0, pVecTmp = iov; i < (size_t)iovcnt; i++, pVecTmp++) {
+    TotalBytes += pVecTmp->iov_len;
+  }
+
+  //
+  //  Allocate a contiguous buffer
+  //
+
+  pBuf = (char*)malloc (TotalBytes);
+  if (pBuf == NULL) {
+    errno = ENOMEM;
+    return -1;
+  }
+
+  //
+  //  Copy vectors to the buffer
+  //
+
+  for (pBufTmp = pBuf; iovcnt; iovcnt--) {
+    bcopy(iov->iov_base, pBuf, iov->iov_len);
+    pBuf += iov->iov_len;
+    iov++;
+  }
+
+  //
+  //  Use standard write(2) then free buffer
+  //
+
+  ret = write (fd, pBuf, TotalBytes);
+  free (pBuf);
+
+  return (ret);
+}