1 files changed, 118 insertions, 0 deletions
diff --git a/buckets/mmap_buckets.c b/buckets/mmap_buckets.c
new file mode 100644
index 0000000..f55a76b
--- /dev/null
+++ b/buckets/mmap_buckets.c
@@ -0,0 +1,118 @@
+/* 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_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,
+};