xref: /aosp_15_r20/external/sandboxed-api/sandboxed_api/util/file_helpers.cc (revision ec63e07ab9515d95e79c211197c445ef84cefa6a)
1*ec63e07aSXin Li // Copyright 2019 Google LLC
2*ec63e07aSXin Li //
3*ec63e07aSXin Li // Licensed under the Apache License, Version 2.0 (the "License");
4*ec63e07aSXin Li // you may not use this file except in compliance with the License.
5*ec63e07aSXin Li // You may obtain a copy of the License at
6*ec63e07aSXin Li //
7*ec63e07aSXin Li //     https://www.apache.org/licenses/LICENSE-2.0
8*ec63e07aSXin Li //
9*ec63e07aSXin Li // Unless required by applicable law or agreed to in writing, software
10*ec63e07aSXin Li // distributed under the License is distributed on an "AS IS" BASIS,
11*ec63e07aSXin Li // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12*ec63e07aSXin Li // See the License for the specific language governing permissions and
13*ec63e07aSXin Li // limitations under the License.
14*ec63e07aSXin Li 
15*ec63e07aSXin Li #include "sandboxed_api/util/file_helpers.h"
16*ec63e07aSXin Li 
17*ec63e07aSXin Li #include <fstream>
18*ec63e07aSXin Li #include <sstream>
19*ec63e07aSXin Li #include <string>
20*ec63e07aSXin Li 
21*ec63e07aSXin Li #include "absl/status/status.h"
22*ec63e07aSXin Li #include "absl/strings/str_cat.h"
23*ec63e07aSXin Li #include "absl/strings/string_view.h"
24*ec63e07aSXin Li 
25*ec63e07aSXin Li namespace sapi::file {
26*ec63e07aSXin Li 
Defaults()27*ec63e07aSXin Li const Options& Defaults() {
28*ec63e07aSXin Li   static auto* instance = new Options{};
29*ec63e07aSXin Li   return *instance;
30*ec63e07aSXin Li }
31*ec63e07aSXin Li 
GetContents(absl::string_view path,std::string * output,const file::Options & options)32*ec63e07aSXin Li absl::Status GetContents(absl::string_view path, std::string* output,
33*ec63e07aSXin Li                          const file::Options& options) {
34*ec63e07aSXin Li   std::ifstream in_stream{std::string(path), std::ios_base::binary};
35*ec63e07aSXin Li   std::ostringstream out_stream;
36*ec63e07aSXin Li   out_stream << in_stream.rdbuf();
37*ec63e07aSXin Li   if (!in_stream || !out_stream) {
38*ec63e07aSXin Li     return absl::UnknownError(absl::StrCat("Error during read: ", path));
39*ec63e07aSXin Li   }
40*ec63e07aSXin Li   *output = out_stream.str();
41*ec63e07aSXin Li   return absl::OkStatus();
42*ec63e07aSXin Li }
43*ec63e07aSXin Li 
SetContents(absl::string_view path,absl::string_view content,const file::Options & options)44*ec63e07aSXin Li absl::Status SetContents(absl::string_view path, absl::string_view content,
45*ec63e07aSXin Li                          const file::Options& options) {
46*ec63e07aSXin Li   std::ofstream out_stream(std::string(path),
47*ec63e07aSXin Li                            std::ios_base::trunc | std::ios_base::binary);
48*ec63e07aSXin Li   if (!out_stream) {
49*ec63e07aSXin Li     return absl::UnknownError(absl::StrCat("Failed to open file: ", path));
50*ec63e07aSXin Li   }
51*ec63e07aSXin Li   out_stream.write(content.data(), content.size());
52*ec63e07aSXin Li   if (!out_stream) {
53*ec63e07aSXin Li     return absl::UnknownError(absl::StrCat("Error during write: ", path));
54*ec63e07aSXin Li   }
55*ec63e07aSXin Li   return absl::OkStatus();
56*ec63e07aSXin Li }
57*ec63e07aSXin Li 
58*ec63e07aSXin Li }  // namespace sapi::file
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