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/* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "istream-private.h"
#include "fs-api-private.h"
#include "istream-fs-file.h"
struct fs_file_istream {
struct istream_private istream;
struct fs_file *file;
};
static void i_stream_fs_file_close(struct iostream_private *stream,
bool close_parent ATTR_UNUSED)
{
struct fs_file_istream *fstream = (struct fs_file_istream *)stream;
i_stream_destroy(&fstream->istream.parent);
fs_file_deinit(&fstream->file);
}
static ssize_t i_stream_fs_file_read(struct istream_private *stream)
{
struct fs_file_istream *fstream = (struct fs_file_istream *)stream;
struct istream *input;
if (fstream->istream.parent == NULL) {
input = fs_read_stream(fstream->file,
i_stream_get_max_buffer_size(&stream->istream));
i_stream_init_parent(stream, input);
i_stream_unref(&input);
}
i_stream_seek(stream->parent, stream->parent_start_offset +
stream->istream.v_offset);
return i_stream_read_copy_from_parent(&stream->istream);
}
struct istream *
i_stream_create_fs_file(struct fs_file **file, size_t max_buffer_size)
{
struct fs_file_istream *fstream;
struct istream *input;
fstream = i_new(struct fs_file_istream, 1);
fstream->file = *file;
fstream->istream.iostream.close = i_stream_fs_file_close;
fstream->istream.max_buffer_size = max_buffer_size;
fstream->istream.read = i_stream_fs_file_read;
fstream->istream.stream_size_passthrough = TRUE;
fstream->istream.istream.blocking =
((*file)->flags & FS_OPEN_FLAG_ASYNC) == 0;
fstream->istream.istream.seekable =
((*file)->flags & FS_OPEN_FLAG_SEEKABLE) != 0;
input = i_stream_create(&fstream->istream, NULL, -1, 0);
i_stream_set_name(input, fs_file_path(*file));
*file = NULL;
return input;
}
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