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authorarchshift <gh@archshift.com>2015-09-01 03:29:23 +0200
committerarchshift <gh@archshift.com>2015-10-01 06:04:47 +0200
commit7134a17fc6cb7ab8ae46dae04f005bb72e0af88e (patch)
treea7276d2efdbeae8ea1fd84e81eca3bfa6a34e7df /src
parentExpose loader helper functions for identifying files. (diff)
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Diffstat (limited to 'src')
-rw-r--r--src/common/file_util.cpp160
-rw-r--r--src/common/file_util.h26
2 files changed, 83 insertions, 103 deletions
diff --git a/src/common/file_util.cpp b/src/common/file_util.cpp
index 836b58d52..2fbb0f260 100644
--- a/src/common/file_util.cpp
+++ b/src/common/file_util.cpp
@@ -420,28 +420,23 @@ bool CreateEmptyFile(const std::string &filename)
}
-// Scans the directory tree gets, starting from _Directory and adds the
-// results into parentEntry. Returns the number of files+directories found
-u32 ScanDirectoryTree(const std::string &directory, FSTEntry& parentEntry)
+int ScanDirectoryTreeAndCallback(const std::string &directory, std::function<int(const std::string&, const std::string&)> callback)
{
LOG_TRACE(Common_Filesystem, "directory %s", directory.c_str());
// How many files + directories we found
- u32 foundEntries = 0;
+ int found_entries = 0;
#ifdef _WIN32
// Find the first file in the directory.
WIN32_FIND_DATA ffd;
- HANDLE hFind = FindFirstFile(Common::UTF8ToTStr(directory + "\\*").c_str(), &ffd);
- if (hFind == INVALID_HANDLE_VALUE)
- {
- FindClose(hFind);
- return foundEntries;
+ HANDLE handle_find = FindFirstFile(Common::UTF8ToTStr(directory + "\\*").c_str(), &ffd);
+ if (handle_find == INVALID_HANDLE_VALUE) {
+ FindClose(handle_find);
+ return found_entries;
}
// windows loop
- do
- {
- FSTEntry entry;
- const std::string virtualName(Common::TStrToUTF8(ffd.cFileName));
+ do {
+ const std::string virtual_name(Common::TStrToUTF8(ffd.cFileName));
#else
struct dirent dirent, *result = nullptr;
@@ -450,115 +445,80 @@ u32 ScanDirectoryTree(const std::string &directory, FSTEntry& parentEntry)
return 0;
// non windows loop
- while (!readdir_r(dirp, &dirent, &result) && result)
- {
- FSTEntry entry;
- const std::string virtualName(result->d_name);
+ while (!readdir_r(dirp, &dirent, &result) && result) {
+ const std::string virtual_name(result->d_name);
#endif
// check for "." and ".."
- if (((virtualName[0] == '.') && (virtualName[1] == '\0')) ||
- ((virtualName[0] == '.') && (virtualName[1] == '.') &&
- (virtualName[2] == '\0')))
+ if (((virtual_name[0] == '.') && (virtual_name[1] == '\0')) ||
+ ((virtual_name[0] == '.') && (virtual_name[1] == '.') &&
+ (virtual_name[2] == '\0')))
continue;
- entry.virtualName = virtualName;
- entry.physicalName = directory;
- entry.physicalName += DIR_SEP + entry.virtualName;
- if (IsDirectory(entry.physicalName.c_str()))
- {
- entry.isDirectory = true;
- // is a directory, lets go inside
- entry.size = ScanDirectoryTree(entry.physicalName, entry);
- foundEntries += (u32)entry.size;
- }
- else
- { // is a file
- entry.isDirectory = false;
- entry.size = GetSize(entry.physicalName.c_str());
+ int ret = callback(directory, virtual_name);
+ if (ret < 0) {
+ if (ret != -1)
+ found_entries = ret;
+ break;
}
- ++foundEntries;
- // Push into the tree
- parentEntry.children.push_back(entry);
+ found_entries += ret;
+
#ifdef _WIN32
- } while (FindNextFile(hFind, &ffd) != 0);
- FindClose(hFind);
+ } while (FindNextFile(handle_find, &ffd) != 0);
+ FindClose(handle_find);
#else
}
closedir(dirp);
#endif
// Return number of entries found.
- return foundEntries;
+ return found_entries;
}
-
-// Deletes the given directory and anything under it. Returns true on success.
-bool DeleteDirRecursively(const std::string &directory)
+int ScanDirectoryTree(const std::string &directory, FSTEntry& parent_entry)
{
- LOG_TRACE(Common_Filesystem, "%s", directory.c_str());
-#ifdef _WIN32
- // Find the first file in the directory.
- WIN32_FIND_DATA ffd;
- HANDLE hFind = FindFirstFile(Common::UTF8ToTStr(directory + "\\*").c_str(), &ffd);
-
- if (hFind == INVALID_HANDLE_VALUE)
- {
- FindClose(hFind);
- return false;
- }
-
- // windows loop
- do
- {
- const std::string virtualName(Common::TStrToUTF8(ffd.cFileName));
-#else
- struct dirent dirent, *result = nullptr;
- DIR *dirp = opendir(directory.c_str());
- if (!dirp)
- return false;
-
- // non windows loop
- while (!readdir_r(dirp, &dirent, &result) && result)
- {
- const std::string virtualName = result->d_name;
-#endif
+ const auto callback = [&parent_entry](const std::string& directory,
+ const std::string& virtual_name) -> int {
+ FSTEntry entry;
+ int found_entries = 0;
+ entry.virtualName = virtual_name;
+ entry.physicalName = directory + DIR_SEP + virtual_name;
- // check for "." and ".."
- if (((virtualName[0] == '.') && (virtualName[1] == '\0')) ||
- ((virtualName[0] == '.') && (virtualName[1] == '.') &&
- (virtualName[2] == '\0')))
- continue;
+ if (IsDirectory(entry.physicalName)) {
+ entry.isDirectory = true;
+ // is a directory, lets go inside
+ entry.size = ScanDirectoryTree(entry.physicalName, entry);
+ found_entries += (int)entry.size;
+ } else { // is a file
+ entry.isDirectory = false;
+ entry.size = GetSize(entry.physicalName);
+ }
+ ++found_entries;
+ // Push into the tree
+ parent_entry.children.push_back(entry);
+ return found_entries;
+ };
- std::string newPath = directory + DIR_SEP_CHR + virtualName;
- if (IsDirectory(newPath))
- {
- if (!DeleteDirRecursively(newPath))
- {
- #ifndef _WIN32
- closedir(dirp);
- #endif
+ return ScanDirectoryTreeAndCallback(directory, callback);
+}
- return false;
- }
- }
- else
- {
- if (!FileUtil::Delete(newPath))
- {
- #ifndef _WIN32
- closedir(dirp);
- #endif
- return false;
+bool DeleteDirRecursively(const std::string &directory)
+{
+ const static auto callback = [](const std::string& directory,
+ const std::string& virtual_name) -> int {
+ std::string new_path = directory + DIR_SEP_CHR + virtual_name;
+ if (IsDirectory(new_path)) {
+ if (!DeleteDirRecursively(new_path)) {
+ return -2;
}
+ } else if (!Delete(new_path)) {
+ return -2;
}
+ return 0;
+ };
-#ifdef _WIN32
- } while (FindNextFile(hFind, &ffd) != 0);
- FindClose(hFind);
-#else
+ if (ScanDirectoryTreeAndCallback(directory, callback) == -2) {
+ return false;
}
- closedir(dirp);
-#endif
FileUtil::DeleteDir(directory);
return true;
diff --git a/src/common/file_util.h b/src/common/file_util.h
index e71a9b2fa..3d617f573 100644
--- a/src/common/file_util.h
+++ b/src/common/file_util.h
@@ -6,6 +6,7 @@
#include <array>
#include <fstream>
+#include <functional>
#include <cstddef>
#include <cstdio>
#include <string>
@@ -96,9 +97,28 @@ bool Copy(const std::string &srcFilename, const std::string &destFilename);
// creates an empty file filename, returns true on success
bool CreateEmptyFile(const std::string &filename);
-// Scans the directory tree gets, starting from _Directory and adds the
-// results into parentEntry. Returns the number of files+directories found
-u32 ScanDirectoryTree(const std::string &directory, FSTEntry& parentEntry);
+/**
+ * Scans the directory tree, calling the callback for each file/directory found.
+ * The callback must return the number of files and directories which the provided path contains.
+ * If the callback's return value is -1, the callback loop is broken immediately.
+ * If the callback's return value is otherwise negative, the callback loop is broken immediately
+ * and the callback's return value is returned from this function (to allow for error handling).
+ * @param directory the parent directory to start scanning from
+ * @param callback The callback which will be called for each file/directory. It is called
+ * with the arguments (const std::string& directory, const std::string& virtual_name).
+ * The `directory `parameter is the path to the directory which contains the file/directory.
+ * The `virtual_name` parameter is the incomplete file path, without any directory info.
+ * @return the total number of files/directories found
+ */
+int ScanDirectoryTreeAndCallback(const std::string &directory, std::function<int(const std::string&, const std::string&)> callback);
+
+/**
+ * Scans the directory tree, storing the results.
+ * @param directory the parent directory to start scanning from
+ * @param parent_entry FSTEntry where the filesystem tree results will be stored.
+ * @return the total number of files/directories found
+ */
+int ScanDirectoryTree(const std::string &directory, FSTEntry& parent_entry);
// deletes the given directory and anything under it. Returns true on success.
bool DeleteDirRecursively(const std::string &directory);