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// $Id$
#include "ACEXML/common/FileCharStream.h"
#include "ace/ACE.h"
ACEXML_FileCharStream::ACEXML_FileCharStream (void)
: filename_ (0), encoding_ (0), size_ (0), infile_ (NULL), peek_ (0)
{
}
ACEXML_FileCharStream::~ACEXML_FileCharStream (void)
{
this->close();
}
int
ACEXML_FileCharStream::open (const ACEXML_Char *name)
{
delete[] this->filename_;
this->filename_ = 0;
delete[] this->encoding_;
this->encoding_ = 0;
this->infile_ = ACE_OS::fopen (name, ACE_TEXT ("r"));
if (this->infile_ == NULL)
return -1;
ACE_stat statbuf;
if (ACE_OS::stat (name, &statbuf) < 0)
return -1;
this->size_ = statbuf.st_size;
this->filename_ = ACE::strnew (name);
if (this->determine_encoding() == -1)
return -1;
return 0;
}
int
ACEXML_FileCharStream::determine_encoding (void)
{
char input[4];
int retval = 0;
int i = 0;
for (; i < 4 && retval != -1; ++i)
retval = this->getchar_i(input[i]);
if (i < 4)
return -1;
const ACEXML_Char* temp = ACEXML_Encoding::get_encoding (input);
if (!temp)
return -1;
if (ACE_OS::strcmp (temp,
ACEXML_Encoding::encoding_names_[ACEXML_Encoding::OTHER]) == 0)
return -1;
else
{
this->encoding_ = ACE::strnew (temp);
ACE_DEBUG ((LM_DEBUG, "File's encoding is %s\n", this->encoding_));
}
// Rewind the stream
this->rewind();
// Move over the byte-order-mark if present.
char ch;
for (int j = 0; j < 2; ++j)
{
this->getchar_i (ch);
if (ch == '\xFF' || ch == '\xFE' || ch == '\xEF')
continue;
else
{
ungetc (ch, this->infile_);
break;
}
}
return 0;
}
void
ACEXML_FileCharStream::rewind()
{
ACE_OS::rewind (this->infile_);
}
int
ACEXML_FileCharStream::available (void)
{
long curr;
if ((curr = ACE_OS::ftell (this->infile_)) < 0)
return -1;
return (this->size_ - curr);
}
int
ACEXML_FileCharStream::close (void)
{
if (this->infile_ != NULL)
ACE_OS::fclose (this->infile_);
delete[] this->filename_;
delete[] this->encoding_;
this->size_ = 0;
this->peek_ = 0;
return 0;
}
int
ACEXML_FileCharStream::getchar_i (char& ch)
{
ch = ACE_OS::fgetc (this->infile_);
return (feof(this->infile_) ? -1 : 0);
}
int
ACEXML_FileCharStream::read (ACEXML_Char *str,
size_t len)
{
return ACE_OS::fread (str, len, 1, this->infile_);
}
int
ACEXML_FileCharStream::get (ACEXML_Char& ch)
{
#if defined (ACE_USES_WCHAR)
return this->get_i (ch);
#else
ch = (ACEXML_Char) ACE_OS::fgetc (this->infile_);
return (feof(this->infile_) ? -1 : 0);
#endif /* ACE_USES_WCHAR */
}
#if defined (ACE_USES_WCHAR)
int
ACEXML_FileCharStream::get_i (ACEXML_Char& ch)
{
if (ACE_OS::strcmp (this->encoding_, ACE_TEXT ("UTF-8")) == 0)
{
ch = (ACEXML_Char) ACE_OS::fgetc (this->infile_);
return (feof(this->infile_) ? -1 : 0);
}
// If we have a value in peek_, return it.
if (this->peek_ != 0)
{
ch = this->peek_;
this->peek_ = 0;
return 0;
}
int BE = (ACE_OS::strcmp (this->encoding_,
ACE_TEXT ("UTF-16BE")) == 0) ? 1 : 0;
ACEXML_Char input[2];
int i = 0;
for (i = 0; i < 2 && !feof (this->infile_); ++i)
{
input[i] = ACE_OS::fgetwc (this->infile_);
}
if (i < 2)
{
ch = 0;
return -1;
}
ch = (BE) ? (input[0] << 8) | input[1] : (input[1] << 8) | input[0];
return 0;
}
#endif /* ACE_USES_WCHAR */
int
ACEXML_FileCharStream::peek (void)
{
#if defined (ACE_USES_WCHAR)
return this->peek_i();
#else
ACEXML_Char ch = ACE_OS::fgetc (this->infile_);
::ungetc (ch, this->infile_);
return ch;
#endif /* ACE_USES_WCHAR */
}
#if defined (ACE_USES_WCHAR)
int
ACEXML_FileCharStream::peek_i (void)
{
// If we are reading a UTF-8 encoded file, just use the plain unget.
if (ACE_OS::strcmp (this->encoding_, ACE_TEXT ("UTF-8")) == 0)
{
ACEXML_Char ch = (ACEXML_Char) ACE_OS::fgetc (this->infile_);
::ungetc (ch, this->infile_);
return ch;
}
// If somebody had already called peek() and not consumed it, return the
// value held in this->peek_.
if (this->peek_ != 0)
return this->peek_;
// Peek into the stream. This reads two characters off the stream, keeps
// it in peek_.
int BE = (ACE_OS::strcmp (this->encoding_,
ACE_TEXT ("UTF-16BE")) == 0) ? 1 : 0;
ACEXML_Char input[2];
int i = 0;
for (i = 0; i < 2 && !feof (this->infile_); ++i)
{
input[i] = ACE_OS::fgetwc (this->infile_);
}
if (i < 2)
{
this->peek_ = 0;
return -1;
}
this->peek_ = (BE) ? (input[0] << 8) | input[1] : (input[1] << 8) | input[0];
return this->peek_;
}
#endif /* ACE_USES_WCHAR */
const ACEXML_Char*
ACEXML_FileCharStream::getEncoding (void)
{
return this->encoding_;
}
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