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/*
* Copyright 2017 Google LLC
*
* 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 "fcp/base/platform.h"
#include <stdlib.h>
#include <sys/stat.h>
#include <cstdio>
#include <fstream>
#include <sstream>
#include <string>
#include "absl/status/status.h"
#ifdef _WIN32
#include <direct.h>
#endif
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "absl/strings/strip.h"
#include "fcp/base/monitoring.h"
namespace fcp {
namespace {
#ifdef _WIN32
constexpr char kPathSeparator[] = "\\";
#else
constexpr char kPathSeparator[] = "/";
#endif
} // namespace
std::string ConcatPath(absl::string_view path1, absl::string_view path2) {
if (path1.empty()) {
return std::string(path2);
}
return absl::StrCat(path1, kPathSeparator, path2);
}
absl::string_view StripTrailingPathSeparator(absl::string_view path) {
return absl::StripSuffix(path, kPathSeparator);
}
namespace internal {
template <typename T>
absl::StatusOr<T> ReadFile(absl::string_view file_name) {
auto file_name_str = std::string(file_name);
std::ifstream is(file_name_str);
if (!is) {
return absl::InternalError(
absl::StrCat("cannot read file ", file_name_str));
}
std::ostringstream buffer;
buffer << is.rdbuf();
if (!is) {
return absl::InternalError(
absl::StrCat("error reading file ", file_name_str));
}
return static_cast<T>(buffer.str());
}
} // namespace internal
absl::StatusOr<std::string> ReadFileToString(absl::string_view file_name) {
return internal::ReadFile<std::string>(file_name);
}
absl::StatusOr<absl::Cord> ReadFileToCord(absl::string_view file_name) {
return internal::ReadFile<absl::Cord>(file_name);
}
absl::Status WriteStringToFile(absl::string_view file_name,
absl::string_view content) {
auto file_name_str = std::string(file_name);
std::ofstream os(file_name_str);
if (!os) {
return absl::InternalError(
absl::StrCat("cannot create file ", file_name_str));
}
os << content;
if (!os) {
return absl::InternalError(
absl::StrCat("error writing to file ", file_name_str));
}
return absl::OkStatus();
}
absl::Status WriteCordToFile(absl::string_view file_name,
const absl::Cord& content) {
auto file_name_str = std::string(file_name);
std::ofstream os(file_name_str);
if (!os) {
return absl::InternalError(
absl::StrCat("cannot create file ", file_name_str));
}
for (absl::string_view chunk : content.Chunks()) {
os << chunk;
if (!os) {
return absl::InternalError(
absl::StrCat("error writing to file ", file_name_str));
}
}
return absl::OkStatus();
}
bool FileExists(absl::string_view file_name) {
struct stat info;
return stat(std::string(file_name).c_str(), &info) == 0;
}
std::string GetDataPath(absl::string_view relative_path) {
return std::string(relative_path);
}
} // namespace fcp
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