1 files changed, 124 insertions, 0 deletions
diff --git a/test/core/util/slice_splitter.cc b/test/core/util/slice_splitter.cc
new file mode 100644
index 0000000000..e25e1d862a
--- /dev/null
+++ b/test/core/util/slice_splitter.cc
@@ -0,0 +1,124 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * 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 "test/core/util/slice_splitter.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/useful.h>
+
+const char* grpc_slice_split_mode_name(grpc_slice_split_mode mode) {
+  switch (mode) {
+    case GRPC_SLICE_SPLIT_IDENTITY:
+      return "identity";
+    case GRPC_SLICE_SPLIT_MERGE_ALL:
+      return "merge_all";
+    case GRPC_SLICE_SPLIT_ONE_BYTE:
+      return "one_byte";
+  }
+  return "error";
+}
+
+void grpc_split_slices(grpc_slice_split_mode mode, grpc_slice* src_slices,
+                       size_t src_slice_count, grpc_slice** dst_slices,
+                       size_t* dst_slice_count) {
+  size_t i, j;
+  size_t length;
+
+  switch (mode) {
+    case GRPC_SLICE_SPLIT_IDENTITY:
+      *dst_slice_count = src_slice_count;
+      *dst_slices =
+          (grpc_slice*)gpr_malloc(sizeof(grpc_slice) * src_slice_count);
+      for (i = 0; i < src_slice_count; i++) {
+        (*dst_slices)[i] = src_slices[i];
+        grpc_slice_ref((*dst_slices)[i]);
+      }
+      break;
+    case GRPC_SLICE_SPLIT_MERGE_ALL:
+      *dst_slice_count = 1;
+      length = 0;
+      for (i = 0; i < src_slice_count; i++) {
+        length += GRPC_SLICE_LENGTH(src_slices[i]);
+      }
+      *dst_slices = (grpc_slice*)gpr_malloc(sizeof(grpc_slice));
+      **dst_slices = grpc_slice_malloc(length);
+      length = 0;
+      for (i = 0; i < src_slice_count; i++) {
+        memcpy(GRPC_SLICE_START_PTR(**dst_slices) + length,
+               GRPC_SLICE_START_PTR(src_slices[i]),
+               GRPC_SLICE_LENGTH(src_slices[i]));
+        length += GRPC_SLICE_LENGTH(src_slices[i]);
+      }
+      break;
+    case GRPC_SLICE_SPLIT_ONE_BYTE:
+      length = 0;
+      for (i = 0; i < src_slice_count; i++) {
+        length += GRPC_SLICE_LENGTH(src_slices[i]);
+      }
+      *dst_slice_count = length;
+      *dst_slices = (grpc_slice*)gpr_malloc(sizeof(grpc_slice) * length);
+      length = 0;
+      for (i = 0; i < src_slice_count; i++) {
+        for (j = 0; j < GRPC_SLICE_LENGTH(src_slices[i]); j++) {
+          (*dst_slices)[length] = grpc_slice_sub(src_slices[i], j, j + 1);
+          length++;
+        }
+      }
+      break;
+  }
+}
+
+void grpc_split_slices_to_buffer(grpc_slice_split_mode mode,
+                                 grpc_slice* src_slices, size_t src_slice_count,
+                                 grpc_slice_buffer* dst) {
+  grpc_slice* slices;
+  size_t nslices;
+  size_t i;
+  grpc_split_slices(mode, src_slices, src_slice_count, &slices, &nslices);
+  for (i = 0; i < nslices; i++) {
+    /* add indexed to avoid re-merging split slices */
+    grpc_slice_buffer_add_indexed(dst, slices[i]);
+  }
+  gpr_free(slices);
+}
+
+void grpc_split_slice_buffer(grpc_slice_split_mode mode, grpc_slice_buffer* src,
+                             grpc_slice_buffer* dst) {
+  grpc_split_slices_to_buffer(mode, src->slices, src->count, dst);
+}
+
+grpc_slice grpc_slice_merge(grpc_slice* slices, size_t nslices) {
+  uint8_t* out = NULL;
+  size_t length = 0;
+  size_t capacity = 0;
+  size_t i;
+
+  for (i = 0; i < nslices; i++) {
+    if (GRPC_SLICE_LENGTH(slices[i]) + length > capacity) {
+      capacity = GPR_MAX(capacity * 2, GRPC_SLICE_LENGTH(slices[i]) + length);
+      out = (uint8_t*)gpr_realloc(out, capacity);
+    }
+    memcpy(out + length, GRPC_SLICE_START_PTR(slices[i]),
+           GRPC_SLICE_LENGTH(slices[i]));
+    length += GRPC_SLICE_LENGTH(slices[i]);
+  }
+
+  return grpc_slice_new(out, length, gpr_free);
+}