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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// 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.
// Author: kenton@google.com (Kenton Varda)
// emulates google3/file/base/file.cc
#include <google/protobuf/testing/file.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef _MSC_VER
#define WIN32_LEAN_AND_MEAN // yeah, right
#include <windows.h> // Find*File(). :(
#include <io.h>
#include <direct.h>
#else
#include <dirent.h>
#include <unistd.h>
#endif
#include <errno.h>
namespace google {
namespace protobuf {
#ifdef _WIN32
#define mkdir(name, mode) mkdir(name)
// Windows doesn't have symbolic links.
#define lstat stat
#ifndef F_OK
#define F_OK 00 // not defined by MSVC for whatever reason
#endif
#endif
bool File::Exists(const string& name) {
return access(name.c_str(), F_OK) == 0;
}
bool File::ReadFileToString(const string& name, string* output) {
char buffer[1024];
FILE* file = fopen(name.c_str(), "rb");
if (file == NULL) return false;
while (true) {
size_t n = fread(buffer, 1, sizeof(buffer), file);
if (n <= 0) break;
output->append(buffer, n);
}
int error = ferror(file);
if (fclose(file) != 0) return false;
return error == 0;
}
void File::ReadFileToStringOrDie(const string& name, string* output) {
GOOGLE_CHECK(ReadFileToString(name, output)) << "Could not read: " << name;
}
void File::WriteStringToFileOrDie(const string& contents, const string& name) {
FILE* file = fopen(name.c_str(), "wb");
GOOGLE_CHECK(file != NULL);
GOOGLE_CHECK_EQ(fwrite(contents.data(), 1, contents.size(), file),
contents.size());
GOOGLE_CHECK(fclose(file) == 0);
}
bool File::CreateDir(const string& name, int mode) {
return mkdir(name.c_str(), mode) == 0;
}
bool File::RecursivelyCreateDir(const string& path, int mode) {
if (CreateDir(path, mode)) return true;
// Try creating the parent.
string::size_type slashpos = path.find_first_of('/');
if (slashpos == string::npos) {
// No parent given.
return false;
}
return RecursivelyCreateDir(path.substr(0, slashpos), mode) &&
CreateDir(path, mode);
}
void File::DeleteRecursively(const string& name,
void* dummy1, void* dummy2) {
// We don't care too much about error checking here since this is only used
// in tests to delete temporary directories that are under /tmp anyway.
#ifdef _MSC_VER
// This interface is so weird.
WIN32_FIND_DATA find_data;
HANDLE find_handle = FindFirstFile((name + "/*").c_str(), &find_data);
if (find_handle == INVALID_HANDLE_VALUE) {
// Just delete it, whatever it is.
DeleteFile(name.c_str());
RemoveDirectory(name.c_str());
return;
}
do {
string entry_name = find_data.cFileName;
if (entry_name != "." && entry_name != "..") {
string path = name + "/" + entry_name;
if (find_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
DeleteRecursively(path, NULL, NULL);
RemoveDirectory(path.c_str());
} else {
DeleteFile(path.c_str());
}
}
} while(FindNextFile(find_handle, &find_data));
FindClose(find_handle);
RemoveDirectory(name.c_str());
#else
// Use opendir()! Yay!
// lstat = Don't follow symbolic links.
struct stat stats;
if (lstat(name.c_str(), &stats) != 0) return;
if (S_ISDIR(stats.st_mode)) {
DIR* dir = opendir(name.c_str());
if (dir != NULL) {
while (true) {
struct dirent* entry = readdir(dir);
if (entry == NULL) break;
string entry_name = entry->d_name;
if (entry_name != "." && entry_name != "..") {
DeleteRecursively(name + "/" + entry_name, NULL, NULL);
}
}
}
closedir(dir);
rmdir(name.c_str());
} else if (S_ISREG(stats.st_mode)) {
remove(name.c_str());
}
#endif
}
} // namespace protobuf
} // namespace google
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