src/StoreIOBuffer.h

   1 /*
   2  * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef SQUID_STOREIOBUFFER_H
  10 #define SQUID_STOREIOBUFFER_H
  11
  12 /* TODO: move this and the range() method into a .cci */
  13 #include "MemBuf.h"
  14 #include "Range.h"
  15
  16 class StoreIOBuffer
  17 {
  18
  19 public:
  20     StoreIOBuffer():length(0), offset (0), data (NULL) {flags.error = 0;}
  21
  22     StoreIOBuffer(size_t aLength, int64_t anOffset, char *someData) :
  23         length (aLength), offset (anOffset), data (someData) {
  24         flags.error = 0;
  25     }
  26
  27     /* Create a StoreIOBuffer from a MemBuf and offset */
  28     /* NOTE that MemBuf still "owns" the pointers, StoreIOBuffer is just borrowing them */
  29     StoreIOBuffer(MemBuf *aMemBuf, int64_t anOffset) :
  30         length(aMemBuf->contentSize()),
  31         offset (anOffset),
  32         data(aMemBuf->content()) {
  33         flags.error = 0;
  34     }
  35
  36     StoreIOBuffer(MemBuf *aMemBuf, int64_t anOffset, size_t anLength) :
  37         length(anLength),
  38         offset (anOffset),
  39         data(aMemBuf->content()) {
  40         flags.error = 0;
  41     }
  42
  43     Range<int64_t> range() const {
  44         return Range<int64_t>(offset, offset + length);
  45     }
  46
  47     void dump() const {
  48         if (fwrite(data, length, 1, stderr)) {}
  49         if (fwrite("\n", 1, 1, stderr)) {}
  50     }
  51
  52     struct {
  53         unsigned error:1;
  54     } flags;
  55     size_t length;
  56     int64_t offset;
  57     char *data;
  58 };
  59
  60 inline
  61 std::ostream &
  62 operator <<(std::ostream &os, const StoreIOBuffer &b)
  63 {
  64     return os << "ioBuf(@" << b.offset << ", len=" << b.length << ", " <<
  65            (void*)b.data << (b.flags.error ? ", ERR" : "") << ')';
  66 }
  67
  68 #endif /* SQUID_STOREIOBUFFER_H */
  69