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/* Copyright 2002-2004 Justin Erenkrantz and Greg Stein
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <apr_pools.h>
#include <apr_mmap.h>
#include "serf.h"
#include "serf_bucket_util.h"
#if APR_HAS_MMAP
typedef struct {
apr_mmap_t *mmap;
void *current;
apr_off_t offset;
apr_off_t remaining;
} mmap_context_t;
serf_bucket_t *serf_bucket_mmap_create(
apr_mmap_t *file_mmap,
serf_bucket_alloc_t *allocator)
{
mmap_context_t *ctx;
ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx));
ctx->mmap = file_mmap;
ctx->current = NULL;
ctx->offset = 0;
ctx->remaining = ctx->mmap->size;
return serf_bucket_create(&serf_bucket_type_mmap, allocator, ctx);
}
static apr_status_t serf_mmap_read(serf_bucket_t *bucket,
apr_size_t requested,
const char **data, apr_size_t *len)
{
mmap_context_t *ctx = bucket->data;
if (requested == SERF_READ_ALL_AVAIL || requested > ctx->remaining) {
*len = ctx->remaining;
}
else {
*len = requested;
}
/* ### Would it be faster to call this once and do the offset ourselves? */
apr_mmap_offset((void**)data, ctx->mmap, ctx->offset);
/* For the next read... */
ctx->offset += *len;
ctx->remaining -= *len;
if (ctx->remaining == 0) {
return APR_EOF;
}
return APR_SUCCESS;
}
static apr_status_t serf_mmap_readline(serf_bucket_t *bucket,
int acceptable, int *found,
const char **data, apr_size_t *len)
{
mmap_context_t *ctx = bucket->data;
const char *end;
/* ### Would it be faster to call this once and do the offset ourselves? */
apr_mmap_offset((void**)data, ctx->mmap, ctx->offset);
end = *data;
/* XXX An overflow is generated if we pass &ctx->remaining to readline.
* Not real clear why.
*/
*len = ctx->remaining;
serf_util_readline(&end, len, acceptable, found);
*len = end - *data;
ctx->offset += *len;
ctx->remaining -= *len;
if (ctx->remaining == 0) {
return APR_EOF;
}
return APR_SUCCESS;
}
static apr_status_t serf_mmap_peek(serf_bucket_t *bucket,
const char **data,
apr_size_t *len)
{
/* Oh, bah. */
return APR_ENOTIMPL;
}
const serf_bucket_type_t serf_bucket_type_mmap = {
"MMAP",
serf_mmap_read,
serf_mmap_readline,
serf_default_read_iovec,
serf_default_read_for_sendfile,
serf_default_read_bucket,
serf_mmap_peek,
serf_default_destroy_and_data,
};
#else /* !APR_HAS_MMAP */
serf_bucket_t *serf_bucket_mmap_create(apr_mmap_t *file_mmap,
serf_bucket_alloc_t *allocator)
{
return NULL;
}
const serf_bucket_type_t serf_bucket_type_mmap = {
"MMAP",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
#endif
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