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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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 "src/main/cpp/util/file.h"
#include <errno.h>
#include <limits.h> // PATH_MAX
#include <algorithm>
#include <cstdlib>
#include <vector>
#include "src/main/cpp/util/file_platform.h"
#include "src/main/cpp/util/errors.h"
#include "src/main/cpp/util/exit_code.h"
#include "src/main/cpp/util/strings.h"
namespace blaze_util {
using std::pair;
using std::string;
using std::vector;
bool ReadFrom(const std::function<int(void *, int)> &read_func, string *content,
int max_size) {
content->clear();
char buf[4096];
// OPT: This loop generates one spurious read on regular files.
while (int r = read_func(
buf, max_size > 0
? std::min(max_size, static_cast<int>(sizeof buf))
: sizeof buf)) {
if (r == -1) {
if (errno == EINTR || errno == EAGAIN) continue;
return false;
}
content->append(buf, r);
if (max_size > 0) {
if (max_size > r) {
max_size -= r;
} else {
break;
}
}
}
return true;
}
bool WriteTo(const std::function<int(const void *, size_t)> &write_func,
const void *data, size_t size) {
int r = write_func(data, size);
if (r == -1) {
return false;
}
return r == static_cast<int>(size);
}
bool WriteFile(const std::string &content, const std::string &filename) {
return WriteFile(content.c_str(), content.size(), filename);
}
string Dirname(const string &path) {
return SplitPath(path).first;
}
string Basename(const string &path) {
return SplitPath(path).second;
}
string JoinPath(const string &path1, const string &path2) {
if (path1.empty()) {
// "" + "/bar"
return path2;
}
if (path1[path1.size() - 1] == '/') {
if (path2.find('/') == 0) {
// foo/ + /bar
return path1 + path2.substr(1);
} else {
// foo/ + bar
return path1 + path2;
}
} else {
if (path2.find('/') == 0) {
// foo + /bar
return path1 + path2;
} else {
// foo + bar
return path1 + "/" + path2;
}
}
}
class DirectoryTreeWalker : public DirectoryEntryConsumer {
public:
DirectoryTreeWalker(vector<string> *files,
_ForEachDirectoryEntry walk_entries)
: _files(files), _walk_entries(walk_entries) {}
void Consume(const string &path, bool is_directory) override {
if (is_directory) {
Walk(path);
} else {
_files->push_back(path);
}
}
void Walk(const string &path) { _walk_entries(path, this); }
private:
vector<string> *_files;
_ForEachDirectoryEntry _walk_entries;
};
void GetAllFilesUnder(const string &path, vector<string> *result) {
_GetAllFilesUnder(path, result, &ForEachDirectoryEntry);
}
void _GetAllFilesUnder(const string &path,
vector<string> *result,
_ForEachDirectoryEntry walk_entries) {
DirectoryTreeWalker(result, walk_entries).Walk(path);
}
} // namespace blaze_util
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