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/* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "hash-method.h"
#include "ostream-private.h"
#include "ostream-hash.h"
struct hash_ostream {
struct ostream_private ostream;
const struct hash_method *method;
void *hash_context;
};
static ssize_t
o_stream_hash_sendv(struct ostream_private *stream,
const struct const_iovec *iov, unsigned int iov_count)
{
struct hash_ostream *hstream =
container_of(stream, struct hash_ostream, ostream);
unsigned int i;
size_t bytes_left, block_len;
ssize_t ret;
if ((ret = o_stream_sendv(stream->parent, iov, iov_count)) < 0) {
o_stream_copy_error_from_parent(stream);
return -1;
}
if (ret > 0) {
bytes_left = ret;
for (i = 0; i < iov_count && bytes_left > 0; i++) {
block_len = iov[i].iov_len <= bytes_left ?
iov[i].iov_len : bytes_left;
hstream->method->loop(hstream->hash_context,
iov[i].iov_base, block_len);
bytes_left -= block_len;
}
}
stream->ostream.offset += ret;
return ret;
}
struct ostream *
o_stream_create_hash(struct ostream *output, const struct hash_method *method,
void *hash_context)
{
struct hash_ostream *hstream;
hstream = i_new(struct hash_ostream, 1);
hstream->ostream.sendv = o_stream_hash_sendv;
hstream->method = method;
hstream->hash_context = hash_context;
return o_stream_create(&hstream->ostream, output,
o_stream_get_fd(output));
}
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