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/*
*
* Copyright 2019 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 "src/core/lib/gprpp/global_config_env.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/gpr/env.h"
#include "src/core/lib/gpr/string.h"
#include <ctype.h>
#include <string.h>
#include <string>
#include "absl/strings/str_format.h"
namespace grpc_core {
namespace {
void DefaultGlobalConfigEnvErrorFunction(const char* error_message) {
gpr_log(GPR_ERROR, "%s", error_message);
}
GlobalConfigEnvErrorFunctionType g_global_config_env_error_func =
DefaultGlobalConfigEnvErrorFunction;
void LogParsingError(const char* name, const char* value) {
std::string error_message = absl::StrFormat(
"Illegal value '%s' specified for environment variable '%s'", value,
name);
(*g_global_config_env_error_func)(error_message.c_str());
}
} // namespace
void SetGlobalConfigEnvErrorFunction(GlobalConfigEnvErrorFunctionType func) {
g_global_config_env_error_func = func;
}
grpc_core::UniquePtr<char> GlobalConfigEnv::GetValue() {
return grpc_core::UniquePtr<char>(gpr_getenv(GetName()));
}
void GlobalConfigEnv::SetValue(const char* value) {
gpr_setenv(GetName(), value);
}
void GlobalConfigEnv::Unset() { gpr_unsetenv(GetName()); }
char* GlobalConfigEnv::GetName() {
// This makes sure that name_ is in a canonical form having uppercase
// letters. This is okay to be called serveral times.
for (char* c = name_; *c != 0; ++c) {
*c = toupper(*c);
}
return name_;
}
static_assert(std::is_trivially_destructible<GlobalConfigEnvBool>::value,
"GlobalConfigEnvBool needs to be trivially destructible.");
bool GlobalConfigEnvBool::Get() {
grpc_core::UniquePtr<char> str = GetValue();
if (str == nullptr) {
return default_value_;
}
// parsing given value string.
bool result = false;
if (!gpr_parse_bool_value(str.get(), &result)) {
LogParsingError(GetName(), str.get());
result = default_value_;
}
return result;
}
void GlobalConfigEnvBool::Set(bool value) {
SetValue(value ? "true" : "false");
}
static_assert(std::is_trivially_destructible<GlobalConfigEnvInt32>::value,
"GlobalConfigEnvInt32 needs to be trivially destructible.");
int32_t GlobalConfigEnvInt32::Get() {
grpc_core::UniquePtr<char> str = GetValue();
if (str == nullptr) {
return default_value_;
}
// parsing given value string.
char* end = str.get();
long result = strtol(str.get(), &end, 10);
if (*end != 0) {
LogParsingError(GetName(), str.get());
result = default_value_;
}
return static_cast<int32_t>(result);
}
void GlobalConfigEnvInt32::Set(int32_t value) {
char buffer[GPR_LTOA_MIN_BUFSIZE];
gpr_ltoa(value, buffer);
SetValue(buffer);
}
static_assert(std::is_trivially_destructible<GlobalConfigEnvString>::value,
"GlobalConfigEnvString needs to be trivially destructible.");
grpc_core::UniquePtr<char> GlobalConfigEnvString::Get() {
grpc_core::UniquePtr<char> str = GetValue();
if (str == nullptr) {
return grpc_core::UniquePtr<char>(gpr_strdup(default_value_));
}
return str;
}
void GlobalConfigEnvString::Set(const char* value) { SetValue(value); }
} // namespace grpc_core
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