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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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 "utils.h"
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <algorithm>
#include <string>
#include <android-base/file.h>
#include <android-base/logging.h>
void OneTimeFreeAllocator::Clear() {
for (auto& p : v_) {
delete[] p;
}
v_.clear();
cur_ = nullptr;
end_ = nullptr;
}
const char* OneTimeFreeAllocator::AllocateString(const std::string& s) {
size_t size = s.size() + 1;
if (cur_ + size > end_) {
size_t alloc_size = std::max(size, unit_size_);
char* p = new char[alloc_size];
v_.push_back(p);
cur_ = p;
end_ = p + alloc_size;
}
strcpy(cur_, s.c_str());
const char* result = cur_;
cur_ += size;
return result;
}
FileHelper::FileHelper() : fd_(-1) {
}
FileHelper::FileHelper(const std::string& filename) {
fd_ = TEMP_FAILURE_RETRY(open(filename.c_str(), O_RDONLY | O_BINARY));
}
FileHelper::~FileHelper() {
if (fd_ != -1) {
close(fd_);
}
}
void PrintIndented(size_t indent, const char* fmt, ...) {
va_list ap;
va_start(ap, fmt);
printf("%*s", static_cast<int>(indent * 2), "");
vprintf(fmt, ap);
va_end(ap);
}
bool IsPowerOfTwo(uint64_t value) {
return (value != 0 && ((value & (value - 1)) == 0));
}
void GetEntriesInDir(const std::string& dirpath, std::vector<std::string>* files,
std::vector<std::string>* subdirs) {
if (files != nullptr) {
files->clear();
}
if (subdirs != nullptr) {
subdirs->clear();
}
DIR* dir = opendir(dirpath.c_str());
if (dir == nullptr) {
PLOG(DEBUG) << "can't open dir " << dirpath;
return;
}
dirent* entry;
while ((entry = readdir(dir)) != nullptr) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {
continue;
}
if (IsDir(dirpath + std::string("/") + entry->d_name)) {
if (subdirs != nullptr) {
subdirs->push_back(entry->d_name);
}
} else {
if (files != nullptr) {
files->push_back(entry->d_name);
}
}
}
closedir(dir);
}
bool IsDir(const std::string& dirpath) {
struct stat st;
if (stat(dirpath.c_str(), &st) == 0) {
if (S_ISDIR(st.st_mode)) {
return true;
}
}
return false;
}
bool IsRegularFile(const std::string& filename) {
struct stat st;
if (stat(filename.c_str(), &st) == 0) {
if (S_ISREG(st.st_mode)) {
return true;
}
}
return false;
}
uint64_t GetFileSize(const std::string& filename) {
struct stat st;
if (stat(filename.c_str(), &st) == 0) {
return static_cast<uint64_t>(st.st_size);
}
return 0;
}
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