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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* ostream.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "internal.h"
static int append_sparse_fallback(ostream_t *strm, size_t size)
{
char buffer[512];
size_t diff;
memset(buffer, 0, sizeof(buffer));
while (size > 0) {
diff = size < sizeof(buffer) ? size : sizeof(buffer);
if (strm->append(strm, buffer, diff))
return -1;
size -= diff;
}
return 0;
}
int ostream_append(ostream_t *strm, const void *data, size_t size)
{
return strm->append(strm, data, size);
}
int ostream_append_sparse(ostream_t *strm, size_t size)
{
if (strm->append_sparse == NULL)
return append_sparse_fallback(strm, size);
return strm->append_sparse(strm, size);
}
int ostream_flush(ostream_t *strm)
{
return strm->flush(strm);
}
const char *ostream_get_filename(ostream_t *strm)
{
return strm->get_filename(strm);
}
sqfs_s32 ostream_append_from_istream(ostream_t *out, istream_t *in,
sqfs_u32 size)
{
sqfs_s32 total = 0;
size_t diff;
if (size > 0x7FFFFFFF)
size = 0x7FFFFFFF;
while (size > 0) {
if (in->buffer_offset >= in->buffer_used) {
if (istream_precache(in))
return -1;
if (in->buffer_used == 0)
break;
}
diff = in->buffer_used - in->buffer_offset;
if (diff > size)
diff = size;
if (out->append(out, in->buffer + in->buffer_offset, diff))
return -1;
in->buffer_offset += diff;
size -= diff;
total += diff;
}
return total;
}
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