dep/ACE_wrappers/ace/FILE_IO.cpp

   1 // $Id: FILE_IO.cpp 82559 2008-08-07 20:23:07Z parsons $
   2
   3 #include "ace/FILE_IO.h"
   4
   5 #include "ace/Log_Msg.h"
   6 #include "ace/OS_NS_sys_stat.h"
   7 #include "ace/OS_Memory.h"
   8 #include "ace/Truncate.h"
   9
  10 #if !defined (__ACE_INLINE__)
  11 #include "ace/FILE_IO.inl"
  12 #endif /* __ACE_INLINE__ */
  13
  14 ACE_RCSID(ace, FILE_IO, "$Id: FILE_IO.cpp 82559 2008-08-07 20:23:07Z parsons $")
  15
  16 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  17
  18 ACE_ALLOC_HOOK_DEFINE(ACE_FILE_IO)
  19
  20 void
  21 ACE_FILE_IO::dump (void) const
  22 {
  23 #if defined (ACE_HAS_DUMP)
  24   ACE_TRACE ("ACE_FILE_IO::dump");
  25
  26   ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
  27   this->addr_.dump ();
  28   ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
  29 #endif /* ACE_HAS_DUMP */
  30 }
  31
  32 // Simple-minded do nothing constructor.
  33
  34 ACE_FILE_IO::ACE_FILE_IO (void)
  35 {
  36   ACE_TRACE ("ACE_FILE_IO::ACE_FILE_IO");
  37 }
  38
  39 // Send N char *ptrs and int lengths.  Note that the char *'s precede
  40 // the ints (basically, an varargs version of writev).  The count N is
  41 // the *total* number of trailing arguments, *not* a couple of the
  42 // number of tuple pairs!
  43
  44 ssize_t
  45 ACE_FILE_IO::send (size_t n, ...) const
  46 {
  47   ACE_TRACE ("ACE_FILE_IO::send");
  48   va_list argp;
  49   int total_tuples = ACE_Utils::truncate_cast<int> (n / 2);
  50   iovec *iovp = 0;
  51 #if defined (ACE_HAS_ALLOCA)
  52   iovp = (iovec *) alloca (total_tuples * sizeof (iovec));
  53 #else
  54   ACE_NEW_RETURN (iovp,
  55                   iovec[total_tuples],
  56                   -1);
  57 #endif /* !defined (ACE_HAS_ALLOCA) */
  58
  59   va_start (argp, n);
  60
  61   for (int i = 0; i < total_tuples; i++)
  62     {
  63       iovp[i].iov_base = va_arg (argp, char *);
  64       iovp[i].iov_len  = va_arg (argp, int);
  65     }
  66
  67   ssize_t result = ACE_OS::writev (this->get_handle (),
  68                                    iovp,
  69                                    total_tuples);
  70 #if !defined (ACE_HAS_ALLOCA)
  71   delete [] iovp;
  72 #endif /* !defined (ACE_HAS_ALLOCA) */
  73   va_end (argp);
  74   return result;
  75 }
  76
  77 // This is basically an interface to ACE_OS::readv, that doesn't use
  78 // the struct iovec explicitly.  The ... can be passed as an arbitrary
  79 // number of (char *ptr, int len) tuples.  However, the count N is the
  80 // *total* number of trailing arguments, *not* a couple of the number
  81 // of tuple pairs!
  82
  83 ssize_t
  84 ACE_FILE_IO::recv (size_t n, ...) const
  85 {
  86   ACE_TRACE ("ACE_FILE_IO::recv");
  87   va_list argp;
  88   int total_tuples = ACE_Utils::truncate_cast<int> (n / 2);
  89   iovec *iovp = 0;
  90 #if defined (ACE_HAS_ALLOCA)
  91   iovp = (iovec *) alloca (total_tuples * sizeof (iovec));
  92 #else
  93   ACE_NEW_RETURN (iovp,
  94                   iovec[total_tuples],
  95                   -1);
  96 #endif /* !defined (ACE_HAS_ALLOCA) */
  97
  98   va_start (argp, n);
  99
 100   for (int i = 0; i < total_tuples; i++)
 101     {
 102       iovp[i].iov_base = va_arg (argp, char *);
 103       iovp[i].iov_len  = va_arg (argp, int);
 104     }
 105
 106   ssize_t const result = ACE_OS::readv (this->get_handle (),
 107                                         iovp,
 108                                         total_tuples);
 109 #if !defined (ACE_HAS_ALLOCA)
 110   delete [] iovp;
 111 #endif /* !defined (ACE_HAS_ALLOCA) */
 112   va_end (argp);
 113   return result;
 114 }
 115
 116 // Allows a client to read from a file without having to provide a
 117 // buffer to read.  This method determines how much data is in the
 118 // file, allocates a buffer of this size, reads in the data, and
 119 // returns the number of bytes read.
 120
 121 ssize_t
 122 ACE_FILE_IO::recvv (iovec *io_vec)
 123 {
 124   ACE_TRACE ("ACE_FILE_IO::recvv");
 125
 126   io_vec->iov_base = 0;
 127   size_t const length =
 128     static_cast <size_t> (ACE_OS::filesize (this->get_handle ()));
 129
 130   if (length > 0)
 131     {
 132       ACE_NEW_RETURN (io_vec->iov_base,
 133                       char[length],
 134                       -1);
 135       io_vec->iov_len = this->recv_n (io_vec->iov_base,
 136                                       length);
 137       return io_vec->iov_len;
 138     }
 139   else
 140     {
 141       return ACE_Utils::truncate_cast<ssize_t> (length);
 142     }
 143 }
 144
 145 ACE_END_VERSIONED_NAMESPACE_DECL