summaryrefslogtreecommitdiff
path: root/ACE/ace/FILE_IO.cpp
blob: bf0c41bf418e96a9afe1f4e3715aef90f99c5fa3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
// $Id$

#include "ace/FILE_IO.h"

#include "ace/Log_Msg.h"
#include "ace/OS_NS_sys_stat.h"
#include "ace/OS_Memory.h"
#include "ace/Truncate.h"

#if !defined (__ACE_INLINE__)
#include "ace/FILE_IO.inl"
#endif /* __ACE_INLINE__ */

ACE_RCSID(ace, FILE_IO, "$Id$")

ACE_BEGIN_VERSIONED_NAMESPACE_DECL

ACE_ALLOC_HOOK_DEFINE(ACE_FILE_IO)

void
ACE_FILE_IO::dump (void) const
{
#if defined (ACE_HAS_DUMP)
  ACE_TRACE ("ACE_FILE_IO::dump");

  ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
  this->addr_.dump ();
  ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_HAS_DUMP */
}

// Simple-minded do nothing constructor.

ACE_FILE_IO::ACE_FILE_IO (void)
{
  ACE_TRACE ("ACE_FILE_IO::ACE_FILE_IO");
}

// Send N char *ptrs and int lengths.  Note that the char *'s precede
// the ints (basically, an varargs version of writev).  The count N is
// the *total* number of trailing arguments, *not* a couple of the
// number of tuple pairs!

ssize_t
ACE_FILE_IO::send (size_t n, ...) const
{
  ACE_TRACE ("ACE_FILE_IO::send");
  va_list argp;
  int total_tuples = ACE_Utils::truncate_cast<int> (n / 2);
  iovec *iovp = 0;
#if defined (ACE_HAS_ALLOCA)
  iovp = (iovec *) alloca (total_tuples * sizeof (iovec));
#else
  ACE_NEW_RETURN (iovp,
                  iovec[total_tuples],
                  -1);
#endif /* !defined (ACE_HAS_ALLOCA) */

  va_start (argp, n);

  for (int i = 0; i < total_tuples; i++)
    {
      iovp[i].iov_base = va_arg (argp, char *);
      iovp[i].iov_len  = va_arg (argp, int);
    }

  ssize_t result = ACE_OS::writev (this->get_handle (),
                                   iovp,
                                   total_tuples);
#if !defined (ACE_HAS_ALLOCA)
  delete [] iovp;
#endif /* !defined (ACE_HAS_ALLOCA) */
  va_end (argp);
  return result;
}

// This is basically an interface to ACE_OS::readv, that doesn't use
// the struct iovec explicitly.  The ... can be passed as an arbitrary
// number of (char *ptr, int len) tuples.  However, the count N is the
// *total* number of trailing arguments, *not* a couple of the number
// of tuple pairs!

ssize_t
ACE_FILE_IO::recv (size_t n, ...) const
{
  ACE_TRACE ("ACE_FILE_IO::recv");
  va_list argp;
  int total_tuples = ACE_Utils::truncate_cast<int> (n / 2);
  iovec *iovp = 0;
#if defined (ACE_HAS_ALLOCA)
  iovp = (iovec *) alloca (total_tuples * sizeof (iovec));
#else
  ACE_NEW_RETURN (iovp,
                  iovec[total_tuples],
                  -1);
#endif /* !defined (ACE_HAS_ALLOCA) */

  va_start (argp, n);

  for (int i = 0; i < total_tuples; i++)
    {
      iovp[i].iov_base = va_arg (argp, char *);
      iovp[i].iov_len  = va_arg (argp, int);
    }

  ssize_t const result = ACE_OS::readv (this->get_handle (),
                                        iovp,
                                        total_tuples);
#if !defined (ACE_HAS_ALLOCA)
  delete [] iovp;
#endif /* !defined (ACE_HAS_ALLOCA) */
  va_end (argp);
  return result;
}

// Allows a client to read from a file without having to provide a
// buffer to read.  This method determines how much data is in the
// file, allocates a buffer of this size, reads in the data, and
// returns the number of bytes read.

ssize_t
ACE_FILE_IO::recvv (iovec *io_vec)
{
  ACE_TRACE ("ACE_FILE_IO::recvv");

  io_vec->iov_base = 0;
  size_t const length = static_cast <size_t> (ACE_OS::filesize (this->get_handle ()));

  if (length > 0)
    {
      ACE_NEW_RETURN (io_vec->iov_base,
                      char[length],
                      -1);
      io_vec->iov_len = this->recv_n (io_vec->iov_base,
                                      length);
      return io_vec->iov_len;
    }
  else
    return length;
}

ACE_END_VERSIONED_NAMESPACE_DECL