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#include "unparsed_streambuf.h"
#include "diagnostics/xquery_diagnostics.h"
#include "diagnostics/util_macros.h"
#include "util/oseparator.h"
#include <iomanip>
using namespace std;
namespace zorba {
namespace unparsed{
namespace xml{
streambuf::pos_type streambuf::seekoff( off_type o, ios_base::seekdir d, ios_base::openmode m )
{
clear();
return original()->pubseekoff( o, d, m );
}
streambuf::pos_type streambuf::seekpos( pos_type p, ios_base::openmode m )
{
clear();
return original()->pubseekpos( p, m );
}
streambuf::int_type streambuf::pbackfail( int_type c )
{
if ( !traits_type::eq_int_type( c, traits_type::eof() ) &&
gbuf_.cur_len_ &&
original()->sputbackc( traits_type::to_char_type( c ) ) ) {
--gbuf_.cur_len_;
return c;
}
return traits_type::eof();
}
streambuf::int_type streambuf::uflow()
{
#ifdef ZORBA_DEBUG_UTF8_STREAMBUF
printf( "uflow()\n" );
#endif
int_type const c = original()->sbumpc();
if ( traits_type::eq_int_type( c, traits_type::eof() ) )
return traits_type::eof();
gbuf_.validate( traits_type::to_char_type( c ) );
return c;
}
inline void streambuf::clear() {
gbuf_.clear();
}
streamsize streambuf::xsgetn(char_type* to, std::streamsize size )
{
#ifdef ZORBA_DEBUG_UTF8_STREAMBUF
printf( "xsgetn()\n" );
#endif
streamsize return_size = 0;
if ( gbuf_.char_len_ ) {
streamsize const want = gbuf_.char_len_ - gbuf_.cur_len_;
streamsize const get = min( want, size );
streamsize const got = original()->sgetn( to, get );
for ( streamsize i = 0; i < got; ++i )
gbuf_.validate( to[i] );
to += got;
size -= got, return_size += got;
}
while ( size > 0 ) {
if ( streamsize const got = original()->sgetn( to, size ) ) {
for ( streamsize i = 0; i < got; ++i )
gbuf_.validate( to[i] );
to += got;
size -= got, return_size += got;
} else
break;
}
return return_size;
}
inline void streambuf::buf_type::clear()
{
char_len_ = 0;
}
void streambuf::buf_type::throw_invalid_utf8( utf8::storage_type *buf, utf8::size_type len ) {
ostringstream oss;
oss << hex << setfill('0') << setw(2) << uppercase;
oseparator comma( ',' );
for ( utf8::size_type i = 0; i < len; ++i )
oss << comma << "0x" << (static_cast<unsigned>( buf[i] ) & 0xFF);
clear();
throw ZORBA_EXCEPTION(
zerr::ZXQD0006_INVALID_UTF8_BYTE_SEQUENCE,
ERROR_PARAMS( oss.str() )
);
}
void streambuf::buf_type::validate( utf8::storage_type c, bool bump ) {
utf8::size_type char_len_copy = char_len_, cur_len_copy = cur_len_;
if ( !char_len_copy ) {
//
// This means we're (hopefully) at the first byte of a UTF-8 byte sequence
// comprising a character.
//
try {
char_len_copy = utf8::char_length( c );
cur_len_copy = 0;
if (!c)
throw_invalid_utf8 ( &c, 1);
}
catch ( utf8::invalid_byte const& ) {
throw_invalid_utf8( &c, 1 );
}
}
utf8::storage_type *const cur_byte_ptr = utf8_char_ + cur_len_copy;
utf8::storage_type const old_byte = *cur_byte_ptr;
*cur_byte_ptr = c;
if ( cur_len_copy++ && !utf8::is_continuation_byte( c ) )
throw_invalid_utf8( utf8_char_, cur_len_copy );
if ( bump ) {
char_len_ = (cur_len_copy == char_len_copy ? 0 : char_len_copy);
cur_len_ = cur_len_copy;
} else {
*cur_byte_ptr = old_byte;
}
}
} //xml namespace
streambuf::streambuf(std::streambuf* orig, zstring const& uri, QueryLoc const& loc) :
proxy_buf(new xml::streambuf(orig)),
i_uri(uri),
i_loc(loc),
i_mark(0)
{
}
streambuf::streambuf(std::streambuf* orig, int mark, zstring const& uri, QueryLoc const& loc) :
proxy_buf(new xml::streambuf(orig)),
i_uri(uri),
i_loc(loc),
i_mark(mark)
{
}
streambuf::~streambuf() {}
void streambuf::imbue( std::locale const &loc)
{
proxy_buf->pubimbue( loc );
}
streambuf::pos_type streambuf::seekoff( off_type o, ios_base::seekdir d, ios_base::openmode m )
{
return proxy_buf->pubseekoff( o + i_mark, d, m);
}
streambuf::pos_type streambuf::seekpos( pos_type p, ios_base::openmode m ) {
return proxy_buf->pubseekpos( p, m );
}
std::streambuf* streambuf::setbuf( char_type *p, streamsize s ) {
proxy_buf->pubsetbuf( p, s );
return this;
}
streamsize streambuf::showmanyc() {
return proxy_buf->in_avail();
}
int streambuf::sync() {
return proxy_buf->pubsync();
}
streambuf::int_type streambuf::overflow( int_type c ) {
return proxy_buf->sputc( c );
}
streambuf::int_type streambuf::pbackfail( int_type c ) {
return traits_type::eq_int_type( c, traits_type::eof() ) ?
c : proxy_buf->sputbackc( traits_type::to_char_type( c ) );
}
streambuf::int_type streambuf::uflow() {
return proxy_buf->sbumpc();
}
streambuf::int_type streambuf::underflow() {
return proxy_buf->sgetc();
}
streamsize streambuf::xsgetn( char_type *to, streamsize size ) {
streamsize res;
try
{
res = proxy_buf->sgetn( to, size );
}
catch (ZorbaException const& e)
{
if (e.diagnostic() == zerr::ZXQD0006_INVALID_UTF8_BYTE_SEQUENCE)
throw XQUERY_EXCEPTION(err::FOUT1190, ERROR_PARAMS(i_uri.c_str()), ERROR_LOC(i_loc));
else throw;
}
return res;
}
streamsize streambuf::xsputn( char_type const *from, streamsize size ) {
return proxy_buf->sputn( from, size );
}
/*********************************************************************/
/*********************************************************************/
std::streambuf* alloc_streambuf(std::streambuf *orig, int mark, zstring const& uri, QueryLoc const& loc)
{
return new zorba::unparsed::streambuf(orig, mark, uri, loc);
}
}//namesapce unparsed
}//namesapce zorba
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