| /* 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" |
| |
| |
| typedef struct { |
| apr_mmap_t *mmap; |
| void *current; |
| apr_off_t offset; |
| apr_off_t remaining; |
| } mmap_context_t; |
| |
| |
| SERF_DECLARE(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; |
| } |
| |
| SERF_DECLARE_DATA 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, |
| }; |