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/* $Id$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <g3d/stream.h>
EAPI
gboolean g3d_stream_is_seekable(G3DStream *stream)
{
return (stream->flags & (1 << G3D_STREAM_SEEKABLE));
}
EAPI
gchar *g3d_stream_get_uri(G3DStream *stream)
{
return stream->uri;
}
EAPI
gsize g3d_stream_read(G3DStream *stream, gpointer ptr, gsize size)
{
if(stream->read)
return stream->read(ptr, size, stream->data);
return -1;
}
static gchar *generic_readline(G3DStream *stream, gchar *buf, gsize size)
{
gint32 i;
for(i = 0; i < (size - 1); i ++) {
if(g3d_stream_eof(stream))
return NULL;
if(g3d_stream_read(stream, buf + i, 1) <= 0)
return NULL;
if(buf[i] == '\n') {
buf[i + 1] = '\0';
return buf;
}
}
buf[size - 1] = '\0';
return buf;
}
EAPI
gchar *g3d_stream_read_line(G3DStream *stream, gchar *buf, gsize size)
{
stream->linecount ++;
if(stream->readline)
return stream->readline(buf, size, stream->data);
else
return generic_readline(stream, buf, size);
}
EAPI
gint g3d_stream_skip(G3DStream *stream, goffset offset)
{
/* g_return_val_if_fail(offset >= 0, -1); */
if(stream->seek)
return stream->seek(stream->data, offset, G_SEEK_CUR);
else {
goffset todo = offset;
gsize s;
guint8 *buffer = g_new0(guint8, 1024);
while(todo > 0) {
s = MIN(todo, 1024);
if(stream->read(buffer, s, stream->data) < s) {
g_free(buffer);
return -1;
}
offset -= s;
}
g_free(buffer);
return 0;
}
}
EAPI
gint g3d_stream_seek(G3DStream *stream, goffset offset, GSeekType whence)
{
if(stream->seek)
return stream->seek(stream->data, offset, whence);
return -1;
}
EAPI
goffset g3d_stream_tell(G3DStream *stream)
{
if(stream->tell)
return stream->tell(stream->data);
return 0;
}
EAPI
guint32 g3d_stream_line(G3DStream *stream)
{
return stream->linecount;
}
EAPI
goffset g3d_stream_size(G3DStream *stream)
{
if(stream->size)
return stream->size(stream->data);
return -1;
}
EAPI
gboolean g3d_stream_eof(G3DStream *stream)
{
if(stream->eof)
return stream->eof(stream->data);
return FALSE;
}
EAPI
gint g3d_stream_close(G3DStream *stream)
{
gint retval = 0;
if(stream->close)
retval = stream->close(stream->data);
g_free(stream->uri);
g_free(stream);
return retval;
}
EAPI
G3DStream *g3d_stream_new_custom(guint32 flags, const gchar *uri,
G3DStreamReadFunc readfunc, G3DStreamReadLineFunc readlinefunc,
G3DStreamSeekFunc seekfunc, G3DStreamTellFunc tellfunc,
G3DStreamSizeFunc sizefunc,
G3DStreamEofFunc eoffunc, G3DStreamCloseFunc closefunc, gpointer data,
G3DStream *zip_container)
{
G3DStream *stream;
stream = g_new0(G3DStream, 1);
stream->flags = flags;
stream->uri = g_strdup(uri);
stream->read = readfunc;
stream->readline = readlinefunc;
stream->seek = seekfunc;
stream->tell = tellfunc;
stream->size = sizefunc;
stream->eof = eoffunc;
stream->close = closefunc;
stream->data = data;
stream->zip_container = zip_container;
return stream;
}
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