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-rw-r--r--camel/camel-seekable-substream.c522
1 files changed, 0 insertions, 522 deletions
diff --git a/camel/camel-seekable-substream.c b/camel/camel-seekable-substream.c
deleted file mode 100644
index 16b2f56e08..0000000000
--- a/camel/camel-seekable-substream.c
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@@ -1,522 +0,0 @@
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/* camel-stream-fs.c : file system based stream */
-
-/* inspired by gnome-stream-fs.c in bonobo by Miguel de Icaza */
-/*
- *
- * Author :
- * Bertrand Guiheneuf <bertrand@helixcode.com>
- *
- * Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-#include <config.h>
-#include "camel-seekable-substream.h"
-#include "camel-log.h"
-
-static CamelSeekableStreamClass *parent_class=NULL;
-
-
-/* Returns the class for a CamelSeekableSubStream */
-#define CSS_CLASS(so) CAMEL_SEEKABLE_SUBSTREAM_CLASS (GTK_OBJECT(so)->klass)
-
-
-
-
-static gint _read (CamelStream *stream,
- gchar *buffer, gint n);
-static gint _write (CamelStream *stream,
- const gchar *buffer,
- gint n);
-static void _flush (CamelStream *stream);
-static gint _available (CamelStream *stream);
-static gboolean _eos (CamelStream *stream);
-static void _close (CamelStream *stream);
-static gint _seek (CamelSeekableStream *stream,
- gint offset,
- CamelStreamSeekPolicy policy);
-
-static void _finalize (GtkObject *object);
-static void _destroy (GtkObject *object);
-
-static void _init_with_seekable_stream_and_bounds (CamelSeekableSubstream *seekable_substream,
- CamelSeekableStream *parent_stream,
- guint32 inf_bound,
- gint64 sup_bound);
-
-
-
-
-static void
-camel_seekable_substream_class_init (CamelSeekableSubstreamClass *camel_seekable_substream_class)
-{
- CamelSeekableStreamClass *camel_seekable_stream_class = CAMEL_SEEKABLE_STREAM_CLASS (camel_seekable_substream_class);
- CamelStreamClass *camel_stream_class = CAMEL_STREAM_CLASS (camel_seekable_substream_class);
- GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_seekable_substream_class);
-
- parent_class = gtk_type_class (camel_seekable_stream_get_type ());
-
- /* virtual method definition */
- camel_seekable_substream_class->init_with_seekable_stream_and_bounds = _init_with_seekable_stream_and_bounds;
-
- /* virtual method overload */
- camel_stream_class->read = _read;
- camel_stream_class->write = _write;
- camel_stream_class->flush = _flush;
- camel_stream_class->available = _available;
- camel_stream_class->eos = _eos;
- camel_stream_class->close = _close;
-
- camel_seekable_stream_class->seek = _seek;
-
- gtk_object_class->finalize = _finalize;
- gtk_object_class->destroy = _destroy;
-
-}
-
-static void
-camel_seekable_substream_init (gpointer object, gpointer klass)
-{
- /* does nothing */
-}
-
-
-
-
-GtkType
-camel_seekable_substream_get_type (void)
-{
- static GtkType camel_seekable_substream_type = 0;
-
- if (!camel_seekable_substream_type) {
- GtkTypeInfo camel_seekable_substream_info =
- {
- "CamelSeekableSubstream",
- sizeof (CamelSeekableSubstream),
- sizeof (CamelSeekableSubstreamClass),
- (GtkClassInitFunc) camel_seekable_substream_class_init,
- (GtkObjectInitFunc) camel_seekable_substream_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
-
- camel_seekable_substream_type = gtk_type_unique (camel_seekable_stream_get_type (), &camel_seekable_substream_info);
- }
-
- return camel_seekable_substream_type;
-}
-
-
-
-
-
-
-static void
-_destroy (GtkObject *object)
-{
-
- CAMEL_LOG_FULL_DEBUG ("Entering CamelSeekableSubstream::destroy\n");
-
- /* does nothing for the moment */
- GTK_OBJECT_CLASS (parent_class)->destroy (object);
-
- CAMEL_LOG_FULL_DEBUG ("Leaving CamelSeekableSubstream::destroy\n");
-}
-
-
-static void
-_finalize (GtkObject *object)
-{
- CamelSeekableStream *seekable_stream;
- CamelSeekableSubstream *seekable_substream;
- CAMEL_LOG_FULL_DEBUG ("Entering CamelSeekableSubstream::finalize\n");
-
- seekable_stream = CAMEL_SEEKABLE_STREAM (object);
- seekable_substream = CAMEL_SEEKABLE_SUBSTREAM (object);
-
- if (seekable_substream->parent_stream)
- gtk_object_unref (GTK_OBJECT (seekable_substream->parent_stream));
-
- GTK_OBJECT_CLASS (parent_class)->finalize (object);
- CAMEL_LOG_FULL_DEBUG ("Leaving CamelSeekableSubstream::finalize\n");
-}
-
-
-
-static void
-_set_bounds (CamelSeekableSubstream *seekable_substream, guint32 inf_bound, gint64 sup_bound)
-{
- CAMEL_LOG_FULL_DEBUG ("CamelSeekableSubstream::_set_bounds entering\n");
-
- g_assert (seekable_substream);
- g_assert (seekable_substream->parent_stream);
-
- /* store the bounds */
- seekable_substream->inf_bound = inf_bound;
- seekable_substream->sup_bound = sup_bound;
-
-
- seekable_substream->cur_pos = 0;
- seekable_substream->eos = FALSE;
-
- CAMEL_LOG_FULL_DEBUG ("In CamelSeekableSubstream::_set_bounds (%p), "
- "setting inf bound to %lu, "
- "sup bound to %lld, current position to %lu from %lu\n"
- "Parent stream = %p\n",
- seekable_substream,
- seekable_substream->inf_bound, seekable_substream->sup_bound,
- seekable_substream->cur_pos, inf_bound,
- seekable_substream->parent_stream);
-
- CAMEL_LOG_FULL_DEBUG ("CamelSeekableSubstream::_set_bounds Leaving\n");
-}
-
-static void
-_reemit_parent_signal (CamelStream *parent_stream, gpointer user_data)
-{
- CamelSeekableSubstream *seekable_substream = CAMEL_SEEKABLE_SUBSTREAM (user_data);
-
- gtk_signal_emit_by_name (GTK_OBJECT (seekable_substream), "data_available");
-
-}
-
-
-static void
-_init_with_seekable_stream_and_bounds (CamelSeekableSubstream *seekable_substream,
- CamelSeekableStream *parent_stream,
- guint32 inf_bound,
- gint64 sup_bound)
-{
- /* sanity checks */
- g_assert (seekable_substream);
- g_assert (!seekable_substream->parent_stream);
- g_assert (parent_stream);
-
- /* store the parent stream */
- seekable_substream->parent_stream = parent_stream;
- gtk_object_ref (GTK_OBJECT (parent_stream));
-
- /* set the bound of the substream */
- _set_bounds (seekable_substream, inf_bound, sup_bound);
-
- /*
- * connect to the parent stream "data_available"
- * stream so that we can reemit the signal on the
- * seekable substream in case some data would
- * be available for us
- */
- gtk_signal_connect (GTK_OBJECT (parent_stream),
- "data_available",
- _reemit_parent_signal,
- seekable_substream);
-
- gtk_signal_emit_by_name (GTK_OBJECT (seekable_substream), "data_available");
-
-}
-
-
-
-CamelStream *
-camel_seekable_substream_new_with_seekable_stream_and_bounds (CamelSeekableStream *parent_stream,
- guint32 inf_bound,
- gint64 sup_bound)
-{
- CamelSeekableSubstream *seekable_substream;
-
- /* create the seekable substream */
- seekable_substream = gtk_type_new (camel_seekable_substream_get_type ());
-
- /* initialize it */
- CSS_CLASS (seekable_substream)->init_with_seekable_stream_and_bounds (seekable_substream,
- parent_stream,
- inf_bound,
- sup_bound);
- return CAMEL_STREAM (seekable_substream);
-}
-
-
-
-
-
-/**
- * _read: read bytes from a stream
- * @stream: stream
- * @buffer: buffer where bytes are stored
- * @n: max number of bytes to read
- *
- *
- *
- * Return value: number of bytes actually read.
- **/
-static gint
-_read (CamelStream *stream, gchar *buffer, gint n)
-{
- CamelSeekableStream *seekable_stream = CAMEL_SEEKABLE_STREAM (stream);
- CamelSeekableSubstream *seekable_substream = CAMEL_SEEKABLE_SUBSTREAM (stream);
- gint v;
- gint nb_to_read;
- guint32 parent_stream_current_position;
- guint32 position_in_parent;
-
- g_assert (stream);
- g_assert (seekable_substream->parent_stream);
-
- g_assert (n);
-
-
- /*
- we are doing something quite infefficient :
-
- each time we want to read a block, we store
- the parent stream position so that we can
- change it, and restore it before returning
-
- This may change. I don't know yet.
- It may be useless to reseek every time
- and is incompatible with buffering.
- */
-
-
- parent_stream_current_position =
- camel_seekable_stream_get_current_position (seekable_substream->parent_stream);
-
- /* compute the position in the parent stream */
- position_in_parent =
- seekable_stream->cur_pos + seekable_substream->inf_bound;
-
- /* compute how much byte should be read */
- if (seekable_substream->sup_bound != -1)
- nb_to_read =
- MIN (seekable_substream->sup_bound - position_in_parent, n);
- else
- nb_to_read = n;
- //printf ("Nb to read = %d\n", n);
- if (!nb_to_read) {
-
- seekable_substream->eos = TRUE;
- return 0;
- }
-
- /*printf ("In SeekableSubstream(%p)::read, the position has to be changed\n", stream);
- printf ("--- parent_stream_current_position=%d, position_in_parent=%d\n",
- parent_stream_current_position, position_in_parent);
- printf ("--- seekable_substream->inf_bound=%d\n", seekable_substream->inf_bound);
- printf ("--- seekable_substream->sup_bound=%d\n", seekable_substream->sup_bound);
- printf ("--- seekable_substream->parent_stream=%p\n", seekable_substream->parent_stream);
- */
- /* go to our position in the parent stream */
- if (parent_stream_current_position != position_in_parent) {
-
-
- camel_seekable_stream_seek (seekable_substream->parent_stream,
- position_in_parent,
- CAMEL_STREAM_SET);
- }
-
- /* check if we were able to set the position in the parent */
- parent_stream_current_position =
- camel_seekable_stream_get_current_position (seekable_substream->parent_stream);
-
- if (parent_stream_current_position != position_in_parent) {
- seekable_substream->eos = TRUE;
- return 0;
- }
-
-
- /* Read the data */
- if (nb_to_read >0 )
- v = camel_stream_read ( CAMEL_STREAM (seekable_substream->parent_stream),
- buffer,
- nb_to_read);
- else
- v = 0;
-
- /* if the return value is negative, an error occured,
- we must do something FIXME : handle exception */
- if (v<0)
- CAMEL_LOG_FULL_DEBUG ("CamelSeekableSubstream::read v=%d\n", v);
- else
- seekable_stream->cur_pos += v;
-
-
- /* printf ("Nb Bytes Read : %d\n",v); */
- /* return the number of bytes read */
- return v;
-}
-
-
-/**
- * _write: write bytes to a stream
- * @stream: the stream
- * @buffer: byte buffer
- * @n: number of bytes to write
- *
- *
- *
- * Return value: the number of bytes actually written
- * in the stream.
- **/
-static gint
-_write (CamelStream *stream, const gchar *buffer, gint n)
-{
- /* NOT VALID ON SEEKABLE SUBSTREAM */
- g_warning ("CamelSeekableSubstream:: seekable substream don't have a write method\n");
- CAMEL_LOG_WARNING ( "CamelSeekableSubstream:: seekable substream don't have a write method\n");
- return -1;
-}
-
-
-
-/**
- * _flush: flush pending changes
- * @stream: the stream
- *
- *
- **/
-static void
-_flush (CamelStream *stream)
-{
- /* NOT VALID ON SEEKABLE SUBSTREAM */
- g_warning ("CamelSeekableSubstream:: seekable substream don't have a flush method\n");
- CAMEL_LOG_WARNING ( "CamelSeekableSubstream:: seekable substream don't have a flush method\n");
-}
-
-
-
-/**
- * _available: return the number of bytes available for reading
- * @stream: the stream
- *
- * Return the number of bytes available without blocking.
- *
- * Return value: the number of bytes available
- **/
-static gint
-_available (CamelStream *stream)
-{
- g_warning ("not implemented\n");
- return -1;
-}
-
-
-/**
- * _eos: test if there are bytes left to read
- * @stream: the stream
- *
- *
- *
- * Return value: true if all stream has been read
- **/
-static gboolean
-_eos (CamelStream *stream)
-{
- CamelSeekableSubstream *seekable_substream = CAMEL_SEEKABLE_SUBSTREAM (stream);
- CamelSeekableStream *seekable_stream = CAMEL_SEEKABLE_STREAM (stream);
- guint32 substream_len;
- gboolean eos;
-
- g_assert (stream);
-
- if (seekable_substream->eos)
- eos = TRUE;
- else {
-
- /* first check that the parent stream is ok */
- eos = camel_stream_eos (CAMEL_STREAM (seekable_substream->parent_stream));
- if ((!eos) && (seekable_substream->sup_bound != -1)) {
- substream_len = seekable_substream->sup_bound - seekable_substream->inf_bound;
- eos = ( seekable_stream->cur_pos >= substream_len);
- }
- }
-
-
- return eos;
-}
-
-
-/**
- * _close: close a stream
- * @stream: the stream
- *
- *
- **/
-static void
-_close (CamelStream *stream)
-{
- CamelSeekableSubstream *seekable_substream = CAMEL_SEEKABLE_SUBSTREAM (stream);
-
- g_assert (stream);
- seekable_substream->open = FALSE;
-}
-
-
-static gint
-_seek (CamelSeekableStream *stream, gint offset, CamelStreamSeekPolicy policy)
-{
- CamelSeekableSubstream *seekable_substream = CAMEL_SEEKABLE_SUBSTREAM (stream);
- CamelSeekableStream *seekable_stream = CAMEL_SEEKABLE_STREAM (stream);
- gint64 real_offset = 0;
- guint32 substream_len;
- guint32 parent_pos;
- gboolean seek_done = FALSE;
-
- substream_len = seekable_substream->sup_bound - seekable_substream->inf_bound;
-
- seekable_substream->eos = FALSE;
-
- switch (policy) {
-
- case CAMEL_STREAM_SET:
- real_offset = offset;
-
- break;
-
- case CAMEL_STREAM_CUR:
- real_offset = seekable_stream->cur_pos + offset;
-
- break;
-
- case CAMEL_STREAM_END:
- if (seekable_substream->sup_bound != -1)
- real_offset = substream_len - offset;
- else {
- parent_pos = camel_seekable_stream_seek (seekable_substream->parent_stream,
- offset,
- CAMEL_STREAM_END);
- seekable_stream->cur_pos = parent_pos - seekable_substream->inf_bound;
- seek_done = TRUE;
- }
-
- break;
-
- default:
- return -1;
- }
-
- if (!seek_done) {
- if (real_offset > 0) {
- seekable_stream->cur_pos = MIN (real_offset, substream_len);
- } else
- seekable_stream->cur_pos = 0;
- }
-
-
- return seekable_stream->cur_pos;
-}
-
-