Page MenuHomePhorge
Files F117751510

grammar-input-stream.cxx
No OneTemporary
Actions

Authored By
Unknown
Size
2 KB
Referenced Files
None
Subscribers
None

grammar-input-stream.cxx
View Options

// file : examples/cxx/tree/embedded/grammar-input-stream.cxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : not copyrighted - public domain
#include <cassert>
#include "grammar-input-stream.hxx"
grammar_input_stream::
grammar_input_stream (const XMLByte* data, std::size_t size)
: data_ (data),
size_ (size),
pos_ (0),
vpos_ (0),
cseq_ (0),
add_zero_ (false)
{
}
#if _XERCES_VERSION >= 30000
XMLFilePos grammar_input_stream::
curPos () const
{
return static_cast<XMLFilePos> (vpos_);
}
#else
unsigned int grammar_input_stream::
curPos () const
{
return static_cast<unsigned int> (vpos_);
}
#endif
#if _XERCES_VERSION >= 30000
XMLSize_t grammar_input_stream::
readBytes (XMLByte* const buf, const XMLSize_t size)
#else
unsigned int grammar_input_stream::
readBytes (XMLByte* const buf, const unsigned int size)
#endif
{
std::size_t i (0);
// Add a zero from the alternating sequence if it didn't
// fit on the previous read.
//
if (add_zero_)
{
buf[i++] = 0;
add_zero_ = false;
}
// If have an unfinished sequential sequence, output it now.
//
if (cseq_ != 0 && !alt_)
{
for (; cseq_ != 0 && i < size; --cseq_)
buf[i++] = 0;
}
for (; i < size && pos_ < size_;)
{
XMLByte b = buf[i++] = data_[pos_++];
// See if we are in a compression sequence.
//
if (cseq_ != 0)
{
if (i < size)
buf[i++] = 0;
else
add_zero_ = true; // Add it on the next read.
cseq_--;
continue;
}
// If we are not in a compression sequence and this byte is
// not zero then we are done.
//
if (b != 0)
continue;
// We have a zero.
//
assert (pos_ < size_); // There has to be another byte.
unsigned char v (static_cast<unsigned char> (data_[pos_++]));
alt_ = (v & 128) != 0;
cseq_ = v & 127;
// If it is a sequential sequence, output as many zeros as
// we can.
//
if (!alt_)
{
for (; cseq_ != 0 && i < size; --cseq_)
buf[i++] = 0;
}
}
vpos_ += i;
#if _XERCES_VERSION >= 30000
return static_cast<XMLSize_t> (i);
#else
return static_cast<unsigned int> (i);
#endif
}
#if _XERCES_VERSION >= 30000
const XMLCh* grammar_input_stream::
getContentType () const
{
return 0;
}
#endif

File Metadata

Mime Type
text/x-c
Expires
Sat, Apr 4, 3:13 AM (1 d, 9 h)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
0e/ef/98cb09ab8e9f94f3a04beb17a73d
Default Alt Text
grammar-input-stream.cxx (2 KB)

Event Timeline