From 74dd0183e4e56b07cedfa87eae7a8fb3166f01e8 Mon Sep 17 00:00:00 2001
From: Lorry <lorry@roadtrain.codethink.co.uk>
Date: Tue, 28 Aug 2012 15:30:14 +0100
Subject: Tarball conversion

---
 buckets/limit_buckets.c | 134 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 buckets/limit_buckets.c

(limited to 'buckets/limit_buckets.c')

diff --git a/buckets/limit_buckets.c b/buckets/limit_buckets.c
new file mode 100644
index 0000000..d2e6166
--- /dev/null
+++ b/buckets/limit_buckets.c
@@ -0,0 +1,134 @@
+/* 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 "serf.h"
+#include "serf_bucket_util.h"
+
+/* Older versions of APR do not have this macro.  */
+#ifdef APR_SIZE_MAX
+#define REQUESTED_MAX APR_SIZE_MAX
+#else
+#define REQUESTED_MAX (~((apr_size_t)0))
+#endif
+
+
+typedef struct {
+    serf_bucket_t *stream;
+    apr_uint64_t remaining;
+} limit_context_t;
+
+
+serf_bucket_t *serf_bucket_limit_create(
+    serf_bucket_t *stream, apr_uint64_t len, serf_bucket_alloc_t *allocator)
+{
+    limit_context_t *ctx;
+
+    ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx));
+    ctx->stream = stream;
+    ctx->remaining = len;
+
+    return serf_bucket_create(&serf_bucket_type_limit, allocator, ctx);
+}
+
+static apr_status_t serf_limit_read(serf_bucket_t *bucket,
+                                    apr_size_t requested,
+                                    const char **data, apr_size_t *len)
+{
+    limit_context_t *ctx = bucket->data;
+    apr_status_t status;
+
+    if (!ctx->remaining) {
+        *len = 0;
+        return APR_EOF;
+    }
+
+    if (requested == SERF_READ_ALL_AVAIL || requested > ctx->remaining) {
+        if (ctx->remaining <= REQUESTED_MAX) {
+            requested = (apr_size_t) ctx->remaining;
+        } else {
+            requested = REQUESTED_MAX;
+        }
+    }
+
+    status = serf_bucket_read(ctx->stream, requested, data, len);
+
+    if (!SERF_BUCKET_READ_ERROR(status)) {
+        ctx->remaining -= *len;
+    }
+
+    /* If we have met our limit and don't have a status, return EOF. */
+    if (!ctx->remaining && !status) {
+        status = APR_EOF;
+    }
+
+    return status;
+}
+
+static apr_status_t serf_limit_readline(serf_bucket_t *bucket,
+                                         int acceptable, int *found,
+                                         const char **data, apr_size_t *len)
+{
+    limit_context_t *ctx = bucket->data;
+    apr_status_t status;
+
+    if (!ctx->remaining) {
+        *len = 0;
+        return APR_EOF;
+    }
+
+    status = serf_bucket_readline(ctx->stream, acceptable, found, data, len);
+
+    if (!SERF_BUCKET_READ_ERROR(status)) {
+        ctx->remaining -= *len;
+    }
+
+    /* If we have met our limit and don't have a status, return EOF. */
+    if (!ctx->remaining && !status) {
+        status = APR_EOF;
+    }
+
+    return status;
+}
+
+static apr_status_t serf_limit_peek(serf_bucket_t *bucket,
+                                     const char **data,
+                                     apr_size_t *len)
+{
+    limit_context_t *ctx = bucket->data;
+
+    return serf_bucket_peek(ctx->stream, data, len);
+}
+
+static void serf_limit_destroy(serf_bucket_t *bucket)
+{
+    limit_context_t *ctx = bucket->data;
+
+    serf_bucket_destroy(ctx->stream);
+
+    serf_default_destroy_and_data(bucket);
+}
+
+const serf_bucket_type_t serf_bucket_type_limit = {
+    "LIMIT",
+    serf_limit_read,
+    serf_limit_readline,
+    serf_default_read_iovec,
+    serf_default_read_for_sendfile,
+    serf_default_read_bucket,
+    serf_limit_peek,
+    serf_limit_destroy,
+};
-- 
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