source/io/base.cpp

   1 #include "base.h"
   2 #include "poll.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace IO {
   8
   9 Base::Base():
  10         mode(M_READ),
  11         eof_flag(false),
  12         mutex(0)
  13 { }
  14
  15 Base::~Base()
  16 {
  17         signal_deleted.emit();
  18         delete mutex;
  19 }
  20
  21 void Base::check_access(Mode m) const
  22 {
  23         if(!(mode&m))
  24                 throw invalid_access(m);
  25 }
  26
  27 bool Base::getline(string &line)
  28 {
  29         line.clear();
  30
  31         if(eof_flag)
  32                 return false;
  33
  34         while(!eof())
  35         {
  36                 int c = get();
  37                 if(c==-1 || c=='\n')
  38                         break;
  39                 line += c;
  40         }
  41
  42         return !eof_flag || !line.empty();
  43 }
  44
  45 int Base::get()
  46 {
  47         char c;
  48         if(do_read(&c, 1)==0)
  49                 return -1;
  50         return static_cast<unsigned char>(c);
  51 }
  52
  53 void Base::set_eof()
  54 {
  55         if(!eof_flag)
  56         {
  57                 eof_flag = true;
  58                 signal_end_of_file.emit();
  59         }
  60 }
  61
  62
  63 Base::Synchronize::Synchronize(Base &i):
  64         io(i)
  65 {
  66         if(!io.mutex)
  67                 io.mutex = new Mutex;
  68         io.mutex->lock();
  69 }
  70
  71 Base::Synchronize::~Synchronize()
  72 {
  73         io.mutex->unlock();
  74 }
  75
  76 } // namespace IO
  77 } // namespace Msp