1 files changed, 169 insertions, 0 deletions
diff --git a/buckets/iovec_buckets.c b/buckets/iovec_buckets.c
new file mode 100644
index 0000000..9ac1d8d
--- /dev/null
+++ b/buckets/iovec_buckets.c
@@ -0,0 +1,169 @@
+/* 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,
+};