Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc / deps / grpc / src / core / lib / compression / compression_args.cc

diff --git a/legacy-libs/grpc/deps/grpc/src/core/lib/compression/compression_args.cc b/legacy-libs/grpc/deps/grpc/src/core/lib/compression/compression_args.cc
new file mode 100644 (file)
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+++ b/legacy-libs/grpc/deps/grpc/src/core/lib/compression/compression_args.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 <limits.h>
+#include <string.h>
+
+#include <grpc/compression.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/compression/compression_args.h"
+#include "src/core/lib/gpr/string.h"
+#include "src/core/lib/gpr/useful.h"
+
+grpc_compression_algorithm
+grpc_channel_args_get_channel_default_compression_algorithm(
+    const grpc_channel_args* a) {
+  size_t i;
+  if (a == nullptr) return GRPC_COMPRESS_NONE;
+  for (i = 0; i < a->num_args; ++i) {
+    if (a->args[i].type == GRPC_ARG_INTEGER &&
+        !strcmp(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM, a->args[i].key)) {
+      grpc_compression_algorithm default_algorithm =
+          static_cast<grpc_compression_algorithm>(a->args[i].value.integer);
+      return default_algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT
+                 ? default_algorithm
+                 : GRPC_COMPRESS_NONE;
+    }
+  }
+  return GRPC_COMPRESS_NONE;
+}
+
+grpc_channel_args* grpc_channel_args_set_channel_default_compression_algorithm(
+    grpc_channel_args* a, grpc_compression_algorithm algorithm) {
+  GPR_ASSERT(algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT);
+  grpc_arg tmp;
+  tmp.type = GRPC_ARG_INTEGER;
+  tmp.key = (char*)GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM;
+  tmp.value.integer = algorithm;
+  return grpc_channel_args_copy_and_add(a, &tmp, 1);
+}
+
+/** Returns 1 if the argument for compression algorithm's enabled states bitset
+ * was found in \a a, returning the arg's value in \a states. Otherwise, returns
+ * 0. */
+static int find_compression_algorithm_states_bitset(const grpc_channel_args* a,
+                                                    int** states_arg) {
+  if (a != nullptr) {
+    size_t i;
+    for (i = 0; i < a->num_args; ++i) {
+      if (a->args[i].type == GRPC_ARG_INTEGER &&
+          !strcmp(GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET,
+                  a->args[i].key)) {
+        *states_arg = &a->args[i].value.integer;
+        **states_arg =
+            (**states_arg & ((1 << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1)) |
+            0x1; /* forcefully enable support for no compression */
+        return 1;
+      }
+    }
+  }
+  return 0; /* GPR_FALSE */
+}
+
+grpc_channel_args* grpc_channel_args_compression_algorithm_set_state(
+    grpc_channel_args** a, grpc_compression_algorithm algorithm, int state) {
+  int* states_arg = nullptr;
+  grpc_channel_args* result = *a;
+  const int states_arg_found =
+      find_compression_algorithm_states_bitset(*a, &states_arg);
+
+  if (grpc_channel_args_get_channel_default_compression_algorithm(*a) ==
+          algorithm &&
+      state == 0) {
+    const char* algo_name = nullptr;
+    GPR_ASSERT(grpc_compression_algorithm_name(algorithm, &algo_name) != 0);
+    gpr_log(GPR_ERROR,
+            "Tried to disable default compression algorithm '%s'. The "
+            "operation has been ignored.",
+            algo_name);
+  } else if (states_arg_found) {
+    if (state != 0) {
+      GPR_BITSET((unsigned*)states_arg, algorithm);
+    } else if (algorithm != GRPC_COMPRESS_NONE) {
+      GPR_BITCLEAR((unsigned*)states_arg, algorithm);
+    }
+  } else {
+    /* create a new arg */
+    grpc_arg tmp;
+    tmp.type = GRPC_ARG_INTEGER;
+    tmp.key = (char*)GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET;
+    /* all enabled by default */
+    tmp.value.integer = (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
+    if (state != 0) {
+      GPR_BITSET((unsigned*)&tmp.value.integer, algorithm);
+    } else if (algorithm != GRPC_COMPRESS_NONE) {
+      GPR_BITCLEAR((unsigned*)&tmp.value.integer, algorithm);
+    }
+    result = grpc_channel_args_copy_and_add(*a, &tmp, 1);
+    grpc_channel_args_destroy(*a);
+    *a = result;
+  }
+  return result;
+}
+
+uint32_t grpc_channel_args_compression_algorithm_get_states(
+    const grpc_channel_args* a) {
+  int* states_arg;
+  if (find_compression_algorithm_states_bitset(a, &states_arg)) {
+    return static_cast<uint32_t>(*states_arg);
+  } else {
+    return (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1; /* All algs. enabled */
+  }
+}