| /* Copyright 2011 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 "serf.h" |
| #include "serf_bucket_util.h" |
| |
| |
| typedef struct { |
| struct iovec *vecs; |
| |
| /* Total number of buffer stored in the vecs var. */ |
| int vecs_len; |
| /* Points to the first unread buffer. */ |
| int current_vec; |
| /* First buffer offset. */ |
| int offset; |
| } iovec_context_t; |
| |
| serf_bucket_t *serf_bucket_iovec_create( |
| struct iovec vecs[], |
| int len, |
| serf_bucket_alloc_t *allocator) |
| { |
| iovec_context_t *ctx; |
| int i; |
| |
| ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx)); |
| ctx->vecs = serf_bucket_mem_alloc(allocator, len * sizeof(struct iovec)); |
| ctx->vecs_len = len; |
| ctx->current_vec = 0; |
| ctx->offset = 0; |
| |
| /* copy all buffers to our iovec. */ |
| for (i = 0; i < len; i++) { |
| ctx->vecs[i].iov_base = vecs[i].iov_base; |
| ctx->vecs[i].iov_len = vecs[i].iov_len; |
| } |
| |
| return serf_bucket_create(&serf_bucket_type_iovec, allocator, ctx); |
| } |
| |
| static apr_status_t serf_iovec_readline(serf_bucket_t *bucket, |
| int acceptable, int *found, |
| const char **data, apr_size_t *len) |
| { |
| return APR_ENOTIMPL; |
| } |
| |
| static apr_status_t serf_iovec_read_iovec(serf_bucket_t *bucket, |
| apr_size_t requested, |
| int vecs_size, |
| struct iovec *vecs, |
| int *vecs_used) |
| { |
| iovec_context_t *ctx = bucket->data; |
| |
| *vecs_used = 0; |
| |
| /* copy the requested amount of buffers to the provided iovec. */ |
| for (; ctx->current_vec < ctx->vecs_len; ctx->current_vec++) { |
| struct iovec vec = ctx->vecs[ctx->current_vec]; |
| apr_size_t remaining; |
| |
| if (requested != SERF_READ_ALL_AVAIL && requested <= 0) |
| break; |
| if (*vecs_used >= vecs_size) |
| break; |
| |
| vecs[*vecs_used].iov_base = (char*)vec.iov_base + ctx->offset; |
| remaining = vec.iov_len - ctx->offset; |
| |
| /* Less bytes requested than remaining in the current buffer. */ |
| if (requested != SERF_READ_ALL_AVAIL && requested < remaining) { |
| vecs[*vecs_used].iov_len = requested; |
| ctx->offset += requested; |
| requested = 0; |
| (*vecs_used)++; |
| break; |
| } else { |
| /* Copy the complete buffer. */ |
| vecs[*vecs_used].iov_len = remaining; |
| ctx->offset = 0; |
| if (requested != SERF_READ_ALL_AVAIL) |
| requested -= remaining; |
| (*vecs_used)++; |
| } |
| } |
| |
| if (ctx->current_vec == ctx->vecs_len && !ctx->offset) |
| return APR_EOF; |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t serf_iovec_read(serf_bucket_t *bucket, |
| apr_size_t requested, |
| const char **data, apr_size_t *len) |
| { |
| struct iovec vec[1]; |
| apr_status_t status; |
| int vecs_used; |
| |
| status = serf_iovec_read_iovec(bucket, requested, 1, vec, &vecs_used); |
| |
| if (vecs_used) { |
| *data = vec[0].iov_base; |
| *len = vec[0].iov_len; |
| } else { |
| *len = 0; |
| } |
| |
| return status; |
| } |
| |
| static apr_status_t serf_iovec_peek(serf_bucket_t *bucket, |
| const char **data, |
| apr_size_t *len) |
| { |
| iovec_context_t *ctx = bucket->data; |
| |
| if (ctx->current_vec >= ctx->vecs_len) { |
| *len = 0; |
| return APR_EOF; |
| } |
| |
| /* Return the first unread buffer, don't bother combining all |
| remaining data. */ |
| *data = ctx->vecs[ctx->current_vec].iov_base; |
| *len = ctx->vecs[ctx->current_vec].iov_len; |
| |
| if (ctx->current_vec + 1 == ctx->vecs_len) |
| return APR_EOF; |
| |
| return APR_SUCCESS; |
| } |
| |
| static void serf_iovec_destroy(serf_bucket_t *bucket) |
| { |
| iovec_context_t *ctx = bucket->data; |
| |
| serf_bucket_mem_free(bucket->allocator, ctx->vecs); |
| serf_default_destroy_and_data(bucket); |
| } |
| |
| |
| const serf_bucket_type_t serf_bucket_type_iovec = { |
| "IOVEC", |
| serf_iovec_read, |
| serf_iovec_readline, |
| serf_iovec_read_iovec, |
| serf_default_read_for_sendfile, |
| serf_default_read_bucket, |
| serf_iovec_peek, |
| serf_iovec_destroy, |
| }; |