Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc / deps / grpc / src / core / lib / surface / byte_buffer_reader.cc

diff --git a/legacy-libs/grpc/deps/grpc/src/core/lib/surface/byte_buffer_reader.cc b/legacy-libs/grpc/deps/grpc/src/core/lib/surface/byte_buffer_reader.cc
new file mode 100644 (file)
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+++ b/legacy-libs/grpc/deps/grpc/src/core/lib/surface/byte_buffer_reader.cc
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+/*
+ *
+ * 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 <grpc/support/port_platform.h>
+
+#include <grpc/byte_buffer_reader.h>
+#include <string.h>
+
+#include <grpc/byte_buffer.h>
+#include <grpc/compression.h>
+#include <grpc/grpc.h>
+#include <grpc/slice_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/compression/message_compress.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/slice/slice_internal.h"
+
+static int is_compressed(grpc_byte_buffer* buffer) {
+  switch (buffer->type) {
+    case GRPC_BB_RAW:
+      if (buffer->data.raw.compression == GRPC_COMPRESS_NONE) {
+        return 0 /* GPR_FALSE */;
+      }
+      break;
+  }
+  return 1 /* GPR_TRUE */;
+}
+
+int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
+                                 grpc_byte_buffer* buffer) {
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_buffer decompressed_slices_buffer;
+  reader->buffer_in = buffer;
+  switch (reader->buffer_in->type) {
+    case GRPC_BB_RAW:
+      grpc_slice_buffer_init(&decompressed_slices_buffer);
+      if (is_compressed(reader->buffer_in)) {
+        if (grpc_msg_decompress(
+
+                grpc_compression_algorithm_to_message_compression_algorithm(
+                    reader->buffer_in->data.raw.compression),
+                &reader->buffer_in->data.raw.slice_buffer,
+                &decompressed_slices_buffer) == 0) {
+          gpr_log(GPR_ERROR,
+                  "Unexpected error decompressing data for algorithm with enum "
+                  "value '%d'.",
+                  reader->buffer_in->data.raw.compression);
+          memset(reader, 0, sizeof(*reader));
+          return 0;
+        } else { /* all fine */
+          reader->buffer_out =
+              grpc_raw_byte_buffer_create(decompressed_slices_buffer.slices,
+                                          decompressed_slices_buffer.count);
+        }
+        grpc_slice_buffer_destroy_internal(&decompressed_slices_buffer);
+      } else { /* not compressed, use the input buffer as output */
+        reader->buffer_out = reader->buffer_in;
+      }
+      reader->current.index = 0;
+      break;
+  }
+
+  return 1;
+}
+
+void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader* reader) {
+  switch (reader->buffer_in->type) {
+    case GRPC_BB_RAW:
+      /* keeping the same if-else structure as in the init function */
+      if (is_compressed(reader->buffer_in)) {
+        grpc_byte_buffer_destroy(reader->buffer_out);
+      }
+      break;
+  }
+}
+
+int grpc_byte_buffer_reader_peek(grpc_byte_buffer_reader* reader,
+                                 grpc_slice** slice) {
+  switch (reader->buffer_in->type) {
+    case GRPC_BB_RAW: {
+      grpc_slice_buffer* slice_buffer;
+      slice_buffer = &reader->buffer_out->data.raw.slice_buffer;
+      if (reader->current.index < slice_buffer->count) {
+        *slice = &slice_buffer->slices[reader->current.index];
+        reader->current.index += 1;
+        return 1;
+      }
+      break;
+    }
+  }
+  return 0;
+}
+
+int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader* reader,
+                                 grpc_slice* slice) {
+  switch (reader->buffer_in->type) {
+    case GRPC_BB_RAW: {
+      grpc_slice_buffer* slice_buffer;
+      slice_buffer = &reader->buffer_out->data.raw.slice_buffer;
+      if (reader->current.index < slice_buffer->count) {
+        *slice = grpc_slice_ref_internal(
+            slice_buffer->slices[reader->current.index]);
+        reader->current.index += 1;
+        return 1;
+      }
+      break;
+    }
+  }
+  return 0;
+}
+
+grpc_slice grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader* reader) {
+  grpc_slice in_slice;
+  size_t bytes_read = 0;
+  const size_t input_size = grpc_byte_buffer_length(reader->buffer_out);
+  grpc_slice out_slice = GRPC_SLICE_MALLOC(input_size);
+  uint8_t* const outbuf = GRPC_SLICE_START_PTR(out_slice); /* just an alias */
+
+  grpc_core::ExecCtx exec_ctx;
+  while (grpc_byte_buffer_reader_next(reader, &in_slice) != 0) {
+    const size_t slice_length = GRPC_SLICE_LENGTH(in_slice);
+    memcpy(&(outbuf[bytes_read]), GRPC_SLICE_START_PTR(in_slice), slice_length);
+    bytes_read += slice_length;
+    grpc_slice_unref_internal(in_slice);
+    GPR_ASSERT(bytes_read <= input_size);
+  }
+
+  return out_slice;
+}