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/*
*
* Copyright 2015-2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <grpc++/support/channel_arguments.h>
#include <sstream>
#include <grpc/impl/codegen/grpc_types.h>
#include <grpc/support/log.h>
#include "src/core/lib/channel/channel_args.h"
namespace grpc {
ChannelArguments::ChannelArguments() {
std::ostringstream user_agent_prefix;
user_agent_prefix << "grpc-c++/" << grpc_version_string();
// This will be ignored if used on the server side.
SetString(GRPC_ARG_PRIMARY_USER_AGENT_STRING, user_agent_prefix.str());
}
ChannelArguments::ChannelArguments(const ChannelArguments& other)
: strings_(other.strings_) {
args_.reserve(other.args_.size());
auto list_it_dst = strings_.begin();
auto list_it_src = other.strings_.begin();
for (auto a = other.args_.begin(); a != other.args_.end(); ++a) {
grpc_arg ap;
ap.type = a->type;
GPR_ASSERT(list_it_src->c_str() == a->key);
ap.key = const_cast<char*>(list_it_dst->c_str());
++list_it_src;
++list_it_dst;
switch (a->type) {
case GRPC_ARG_INTEGER:
ap.value.integer = a->value.integer;
break;
case GRPC_ARG_STRING:
GPR_ASSERT(list_it_src->c_str() == a->value.string);
ap.value.string = const_cast<char*>(list_it_dst->c_str());
++list_it_src;
++list_it_dst;
break;
case GRPC_ARG_POINTER:
ap.value.pointer = a->value.pointer;
ap.value.pointer.p = a->value.pointer.vtable->copy(ap.value.pointer.p);
break;
}
args_.push_back(ap);
}
}
void ChannelArguments::Swap(ChannelArguments& other) {
args_.swap(other.args_);
strings_.swap(other.strings_);
}
void ChannelArguments::SetCompressionAlgorithm(
grpc_compression_algorithm algorithm) {
SetInt(GRPC_COMPRESSION_ALGORITHM_ARG, algorithm);
}
// Note: a second call to this will add in front the result of the first call.
// An example is calling this on a copy of ChannelArguments which already has a
// prefix. The user can build up a prefix string by calling this multiple times,
// each with more significant identifier.
void ChannelArguments::SetUserAgentPrefix(
const grpc::string& user_agent_prefix) {
if (user_agent_prefix.empty()) {
return;
}
bool replaced = false;
for (auto it = args_.begin(); it != args_.end(); ++it) {
const grpc_arg& arg = *it;
if (arg.type == GRPC_ARG_STRING &&
grpc::string(arg.key) == GRPC_ARG_PRIMARY_USER_AGENT_STRING) {
strings_.push_back(user_agent_prefix + " " + arg.value.string);
it->value.string = const_cast<char*>(strings_.back().c_str());
replaced = true;
break;
}
}
if (!replaced) {
SetString(GRPC_ARG_PRIMARY_USER_AGENT_STRING, user_agent_prefix);
}
}
void ChannelArguments::SetInt(const grpc::string& key, int value) {
grpc_arg arg;
arg.type = GRPC_ARG_INTEGER;
strings_.push_back(key);
arg.key = const_cast<char*>(strings_.back().c_str());
arg.value.integer = value;
args_.push_back(arg);
}
void ChannelArguments::SetPointer(const grpc::string& key, void* value) {
static const grpc_arg_pointer_vtable vtable = {
&PointerVtableMembers::Copy, &PointerVtableMembers::Destroy,
&PointerVtableMembers::Compare};
grpc_arg arg;
arg.type = GRPC_ARG_POINTER;
strings_.push_back(key);
arg.key = const_cast<char*>(strings_.back().c_str());
arg.value.pointer.p = value;
arg.value.pointer.vtable = &vtable;
args_.push_back(arg);
}
void ChannelArguments::SetString(const grpc::string& key,
const grpc::string& value) {
grpc_arg arg;
arg.type = GRPC_ARG_STRING;
strings_.push_back(key);
arg.key = const_cast<char*>(strings_.back().c_str());
strings_.push_back(value);
arg.value.string = const_cast<char*>(strings_.back().c_str());
args_.push_back(arg);
}
void ChannelArguments::SetChannelArgs(grpc_channel_args* channel_args) const {
channel_args->num_args = args_.size();
if (channel_args->num_args > 0) {
channel_args->args = const_cast<grpc_arg*>(&args_[0]);
}
}
} // namespace grpc
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