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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* ostream.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "internal.h"
#include <stdlib.h>
typedef struct{
sqfs_ostream_t base;
sqfs_block_processor_t *proc;
char filename[];
} block_processor_ostream_t;
static int stream_append(sqfs_ostream_t *base, const void *data, size_t size)
{
block_processor_ostream_t *strm = (block_processor_ostream_t *)base;
if (strm->proc == NULL)
return SQFS_ERROR_SEQUENCE;
return sqfs_block_processor_append(strm->proc, data, size);
}
static int stream_flush(sqfs_ostream_t *base)
{
block_processor_ostream_t *strm = (block_processor_ostream_t *)base;
int ret;
if (strm->proc == NULL)
return SQFS_ERROR_SEQUENCE;
ret = sqfs_block_processor_end_file(strm->proc);
strm->proc = sqfs_drop(strm->proc);
return ret;
}
static const char *stream_get_filename(sqfs_ostream_t *strm)
{
return ((block_processor_ostream_t *)strm)->filename;
}
static void stream_destroy(sqfs_object_t *base)
{
block_processor_ostream_t *strm = (block_processor_ostream_t *)base;
if (strm->proc != NULL) {
sqfs_block_processor_end_file(strm->proc);
sqfs_drop(strm->proc);
}
free(strm);
}
int sqfs_block_processor_create_ostream(sqfs_ostream_t **out,
const char *filename,
sqfs_block_processor_t *proc,
sqfs_inode_generic_t **inode,
sqfs_u32 flags)
{
block_processor_ostream_t *strm;
sqfs_ostream_t *base;
size_t size, namelen;
int ret;
*out = NULL;
namelen = strlen(filename);
size = sizeof(*strm) + 1;
if (SZ_ADD_OV(namelen, size, &size))
return SQFS_ERROR_ALLOC;
strm = calloc(1, size);
base = (sqfs_ostream_t *)strm;
if (strm == NULL)
return SQFS_ERROR_ALLOC;
sqfs_object_init(strm, stream_destroy, NULL);
memcpy(strm->filename, filename, namelen);
ret = sqfs_block_processor_begin_file(proc, inode, NULL, flags);
if (ret != 0) {
free(strm);
return ret;
}
strm->proc = sqfs_grab(proc);
base->append = stream_append;
base->flush = stream_flush;
base->get_filename = stream_get_filename;
*out = base;
return 0;
}
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