Linux ip-172-26-7-228 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64
Your IP : 3.22.27.41
/* *****************************************************************************
** $Id$
** Initial file written and documented by:
** Kevin Shepherd <kshepherd@php.net> December 2007
** of Scarlet Line http://www.scarletline.com/
*******************************************************************************/
/** \file gd_io_stream.cxx
\brief Implementation of the methods of the gdIOCtx std stream specialization.
Implements the derived specializations of gdIOCtx.
These methods are not called by users of libgd, they
are internal implementation.
Note that half of the below methods are trivial stubs,
as an input stream has no need of output methods, and vice-versa.
*/
#ifdef __cplusplus
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gd_io_stream.h"
/** Read into buffer from stream
Return the number of bytes successfully read.
If an error occurs, or the end-of-file is reached, the return value
is a short byte count (or zero).
*/
int istreamIOCtx::Getbuf (struct gdIOCtx * ctx, void * buf, int size)
{
stream_type * _str = ( (istreamIOCtx * ) ctx )->_M_stream;
_str->read((char * )buf, size);
return _str->gcount();
}
/** Write from buffer to stream
Return the number of bytes successfully written.
If an error occurs, or the end-of-file is reached, the return value
is a short byte count (or zero).
*/
int istreamIOCtx::Putbuf (struct gdIOCtx * , const void * , int )
{
return 0;
}
/** Reads the next character from stream and returns it as an
unsigned char cast to an int, or EOF on end of file or error.
*/
int istreamIOCtx::Getchar (struct gdIOCtx * ctx)
{
stream_type * _str = ( (istreamIOCtx * ) ctx )->_M_stream;
return _str->get();
}
/** Write the character to stream
Character is cast to unsigned char before writing
*/
void istreamIOCtx::Putchar (struct gdIOCtx * , int )
{
}
/** Seek to position offset from the beginning of the stream
must return 1 on SUCCESS, 0 on FAILURE. Unlike fseek!
*/
int istreamIOCtx::Seek (struct gdIOCtx * ctx, const int pos)
{
stream_type * _str = ( (istreamIOCtx * ) ctx )->_M_stream;
_str->seekg(pos);
return !_str->fail();
}
/** Obtains the current value of the stream position.
Returns -1 on error.
*/
long istreamIOCtx::Tell (struct gdIOCtx * ctx)
{
stream_type * _str = ( (istreamIOCtx * ) ctx )->_M_stream;
return _str->tellg();
}
/** Deallocate the context
*/
void istreamIOCtx::FreeCtx (struct gdIOCtx * ctx)
{
delete (istreamIOCtx * )ctx;
}
/** Read into buffer from stream
Return the number of bytes successfully read.
If an error occurs, or the end-of-file is reached, the return value
is a short byte count (or zero).
*/
int ostreamIOCtx::Getbuf (struct gdIOCtx * , void * , int )
{
return 0;
}
/** Write from buffer to stream
Return the number of bytes successfully written.
If an error occurs, or the end-of-file is reached, the return value
is a short byte count (or zero).
*/
int ostreamIOCtx::Putbuf (struct gdIOCtx * ctx, const void * buf, int size)
{
stream_type * _str = ( (ostreamIOCtx * ) ctx )->_M_stream;
_str->write((const char * )buf, size);
return _str->bad()?0:size;
}
/** Reads the next character from stream and returns it as an
unsigned char cast to an int, or EOF on end of file or error.
*/
int ostreamIOCtx::Getchar (struct gdIOCtx * )
{
return EOF;
}
/** Write the character to stream
Character is cast to unsigned char before writing
*/
void ostreamIOCtx::Putchar (struct gdIOCtx * ctx, int c)
{
stream_type * _str = ( (ostreamIOCtx * ) ctx )->_M_stream;
_str->put((char)c);
}
/** Seek to position offset from the beginning of the stream
must return 1 on SUCCESS, 0 on FAILURE. Unlike fseek!
*/
int ostreamIOCtx::Seek (struct gdIOCtx * ctx, const int pos)
{
stream_type * _str = ( (ostreamIOCtx * ) ctx )->_M_stream;
_str->seekp(pos);
return !_str->fail();
}
/** Obtains the current value of the stream position.
Returns -1 on error.
*/
long ostreamIOCtx::Tell (struct gdIOCtx * ctx)
{
stream_type * _str = ( (ostreamIOCtx * ) ctx )->_M_stream;
return _str->tellp();
}
/** Deallocate the context
*/
void ostreamIOCtx::FreeCtx (struct gdIOCtx * ctx)
{
delete (ostreamIOCtx * )ctx;
}
#endif /* __cplusplus */
|