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/*
* Copyright (C) 2013, 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 "suggest/policyimpl/dictionary/utils/file_utils.h"
#include <cstdio>
#include <cstring>
#include <dirent.h>
#include <fcntl.h>
#include <libgen.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
namespace latinime {
// Returns -1 on error.
/* static */ int FileUtils::getFileSize(const char *const filePath) {
const int fd = open(filePath, O_RDONLY);
if (fd == -1) {
return -1;
}
struct stat statBuf;
if (fstat(fd, &statBuf) != 0) {
close(fd);
return -1;
}
close(fd);
return static_cast<int>(statBuf.st_size);
}
/* static */ bool FileUtils::existsDir(const char *const dirPath) {
DIR *const dir = opendir(dirPath);
if (dir == NULL) {
return false;
}
closedir(dir);
return true;
}
// Remove a directory and all files in the directory.
/* static */ bool FileUtils::removeDirAndFiles(const char *const dirPath) {
return removeDirAndFiles(dirPath, 5 /* maxTries */);
}
// Remove a directory and all files in the directory, trying up to maxTimes.
/* static */ bool FileUtils::removeDirAndFiles(const char *const dirPath, const int maxTries) {
DIR *const dir = opendir(dirPath);
if (dir == NULL) {
AKLOGE("Cannot open dir %s.", dirPath);
return true;
}
struct dirent *dirent;
while ((dirent = readdir(dir)) != NULL) {
if (dirent->d_type == DT_DIR) {
continue;
}
if (strcmp(dirent->d_name, ".") == 0 || strcmp(dirent->d_name, "..") == 0) {
continue;
}
const int filePathBufSize = getFilePathBufSize(dirPath, dirent->d_name);
char filePath[filePathBufSize];
getFilePath(dirPath, dirent->d_name, filePathBufSize, filePath);
if (remove(filePath) != 0) {
AKLOGE("Cannot remove file %s.", filePath);
closedir(dir);
return false;
}
}
closedir(dir);
if (remove(dirPath) != 0) {
if (maxTries > 0) {
// On NFS, deleting files sometimes creates new files. I'm not sure what the
// correct way of dealing with this is, but for the time being, this seems to work.
removeDirAndFiles(dirPath, maxTries - 1);
} else {
AKLOGE("Cannot remove directory %s.", dirPath);
return false;
}
}
return true;
}
/* static */ int FileUtils::getFilePathWithSuffixBufSize(const char *const filePath,
const char *const suffix) {
return strlen(filePath) + strlen(suffix) + 1 /* terminator */;
}
/* static */ void FileUtils::getFilePathWithSuffix(const char *const filePath,
const char *const suffix, const int filePathBufSize, char *const outFilePath) {
snprintf(outFilePath, filePathBufSize, "%s%s", filePath, suffix);
}
/* static */ int FileUtils::getFilePathBufSize(const char *const dirPath,
const char *const fileName) {
return strlen(dirPath) + 1 /* '/' */ + strlen(fileName) + 1 /* terminator */;
}
/* static */ void FileUtils::getFilePath(const char *const dirPath, const char *const fileName,
const int filePathBufSize, char *const outFilePath) {
snprintf(outFilePath, filePathBufSize, "%s/%s", dirPath, fileName);
}
/* static */ bool FileUtils::getFilePathWithoutSuffix(const char *const filePath,
const char *const suffix, const int outDirPathBufSize, char *const outDirPath) {
const int filePathLength = strlen(filePath);
const int suffixLength = strlen(suffix);
if (filePathLength <= suffixLength) {
AKLOGE("File path length (%s:%d) is shorter that suffix length (%s:%d).",
filePath, filePathLength, suffix, suffixLength);
return false;
}
const int resultFilePathLength = filePathLength - suffixLength;
if (outDirPathBufSize <= resultFilePathLength) {
AKLOGE("outDirPathBufSize is too small. filePath: %s, suffix: %s, outDirPathBufSize: %d",
filePath, suffix, outDirPathBufSize);
return false;
}
if (strncmp(filePath + resultFilePathLength, suffix, suffixLength) != 0) {
AKLOGE("File Path %s does not have %s as a suffix", filePath, suffix);
return false;
}
snprintf(outDirPath, resultFilePathLength + 1 /* terminator */, "%s", filePath);
return true;
}
/* static */ void FileUtils::getDirPath(const char *const filePath, const int outDirPathBufSize,
char *const outDirPath) {
for (int i = strlen(filePath) - 1; i >= 0; --i) {
if (filePath[i] == '/') {
if (i >= outDirPathBufSize) {
AKLOGE("outDirPathBufSize is too small. filePath: %s, outDirPathBufSize: %d",
filePath, outDirPathBufSize);
ASSERT(false);
return;
}
snprintf(outDirPath, i + 1 /* terminator */, "%s", filePath);
return;
}
}
}
/* static */ void FileUtils::getBasename(const char *const filePath,
const int outNameBufSize, char *const outName) {
const int filePathBufSize = strlen(filePath) + 1 /* terminator */;
char filePathBuf[filePathBufSize];
snprintf(filePathBuf, filePathBufSize, "%s", filePath);
const char *const baseName = basename(filePathBuf);
const int baseNameLength = strlen(baseName);
if (baseNameLength >= outNameBufSize) {
AKLOGE("outNameBufSize is too small. filePath: %s, outNameBufSize: %d",
filePath, outNameBufSize);
return;
}
snprintf(outName, baseNameLength + 1 /* terminator */, "%s", baseName);
}
} // namespace latinime
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