ACE/ACEXML/common/StrCharStream.cpp

   1 #include "ACEXML/common/StrCharStream.h"
   2 #include "ACEXML/common/Encoding.h"
   3 #include "ace/ACE.h"
   4 #include "ace/Log_Msg.h"
   5 #include "ace/OS_NS_string.h"
   6
   7 ACEXML_StrCharStream::ACEXML_StrCharStream ()
   8   : start_ (0), ptr_ (0), end_ (0), encoding_ (0), name_ (0)
   9 {
  10 }
  11
  12
  13 ACEXML_StrCharStream::~ACEXML_StrCharStream ()
  14 {
  15   this->close();
  16 }
  17
  18 int
  19 ACEXML_StrCharStream::open (const ACEXML_Char *str, const ACEXML_Char* name)
  20 {
  21   if (str != 0 && name != 0)
  22     {
  23       delete [] this->start_;
  24       if ((this->start_ = ACE::strnew (str)) == 0)
  25         return -1;
  26       delete [] this->name_;
  27       if ((this->name_ = ACE::strnew (name)) == 0)
  28         return -1;
  29       this->ptr_ = this->start_;
  30       this->end_ = this->start_ + ACE_OS::strlen (this->start_);
  31       return this->determine_encoding();
  32     }
  33   return -1;                // Invalid string passed.
  34 }
  35
  36 int
  37 ACEXML_StrCharStream::available ()
  38 {
  39   if (this->start_ != 0)
  40     return static_cast<int> (this->end_ - this->start_); // @@ Will this work on all platforms?
  41   return -1;
  42 }
  43
  44 int
  45 ACEXML_StrCharStream::close ()
  46 {
  47   delete[] this->start_;
  48   delete[] this->encoding_;
  49   this->encoding_ = 0;
  50   delete[] this->name_;
  51   this->name_ = 0;
  52   this->start_ = this->ptr_ = this->end_ = 0;
  53   return 0;
  54 }
  55
  56 int
  57 ACEXML_StrCharStream::determine_encoding ()
  58 {
  59   if (this->start_ == 0)
  60     return -1;
  61   char input[4] = {0,0,0,0};
  62   char* sptr  = (char*)this->start_;
  63   int i = 0;
  64   for ( ; i < 4 && sptr != (char*)this->end_; ++sptr, ++i)
  65     input[i] = *sptr;
  66   const ACEXML_Char* temp = ACEXML_Encoding::get_encoding (input);
  67   if (!temp)
  68     return -1;
  69   else
  70     {
  71       delete [] this->encoding_;
  72       this->encoding_ = ACE::strnew (temp);
  73       // ACE_DEBUG ((LM_DEBUG, "String's encoding is %s\n", this->encoding_));
  74     }
  75   return 0;
  76 }
  77
  78 void
  79 ACEXML_StrCharStream::rewind ()
  80 {
  81   this->ptr_ = this->start_;
  82   this->determine_encoding();
  83 }
  84
  85 int
  86 ACEXML_StrCharStream::get (ACEXML_Char& ch)
  87 {
  88   if (this->start_ != 0 && this->ptr_ != this->end_)
  89     {
  90       ch = *this->ptr_++;
  91       return 0;
  92     }
  93   return -1;
  94 }
  95
  96 int
  97 ACEXML_StrCharStream::read (ACEXML_Char *str, size_t len)
  98 {
  99   if (this->start_ != 0 &&
 100       this->ptr_ != this->end_)
 101     {
 102       if (len * sizeof (ACEXML_Char) > (size_t) (this->end_ - this->ptr_))
 103         len = this->end_ - this->ptr_;
 104       ACE_OS::strncpy (str, this->ptr_, len);
 105       this->ptr_ += len;
 106       return static_cast<int> (len);
 107     }
 108   return 0;
 109 }
 110
 111 int
 112 ACEXML_StrCharStream::peek ()
 113 {
 114   if (this->start_ != 0 && this->ptr_ != this->end_)
 115     return *this->ptr_;
 116   return -1;
 117 }
 118
 119 const ACEXML_Char*
 120 ACEXML_StrCharStream::getEncoding ()
 121 {
 122   return this->encoding_;
 123 }
 124
 125 const ACEXML_Char*
 126 ACEXML_StrCharStream::getSystemId()
 127 {
 128   return this->name_;
 129 }