X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fio%2Ffilesystem.cpp;h=5a4515e78dfab5629e5ce806b0622d9822829cc2;hb=ce10bfbe252d5598bbb559c6ce55aed1b9393227;hp=8a06d1c9ef8b64051c5596d687f8e5fd833e5423;hpb=ede25c0a2f59e21521d1cd962e6ea9d78169ca12;p=blank.git

diff --git a/src/io/filesystem.cpp b/src/io/filesystem.cpp
index 8a06d1c..5a4515e 100644
--- a/src/io/filesystem.cpp
+++ b/src/io/filesystem.cpp
@@ -1,44 +1,81 @@
 #include "filesystem.hpp"
 
 #include <cerrno>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+#include <stdexcept>
 #ifdef _WIN32
+#  include <conio.h>
 #  include <direct.h>
+#  include <windows.h>
+#else
+#  include <dirent.h>
+#  include <sys/types.h>
 #endif
 #include <sys/stat.h>
 
+using namespace std;
+
 
 namespace blank {
 
-bool is_dir(const char *path) {
+namespace {
 #ifdef _WIN32
-	struct _stat info;
-	if (_stat(path, &info) != 0) {
-		return false;
+	using Stat = struct _stat;
+	int do_stat(const char *path, Stat &info) {
+		return _stat(path, &info);
+	}
+	bool is_dir(const Stat &info) {
+		return (info.st_mode & _S_IFDIR) != 0;
+	}
+	bool is_file(const Stat &info) {
+		return (info.st_mode & _S_IFEG) != 0;
 	}
-	return (info.st_mode & _S_IFDIR) != 0;
 #else
-	struct stat info;
-	if (stat(path, &info) != 0) {
-		return false;
+	using Stat = struct stat;
+	int do_stat(const char *path, Stat &info) {
+		return stat(path, &info);
+	}
+	bool is_dir(const Stat &info) {
+		return S_ISDIR(info.st_mode);
 	}
-	return S_ISDIR(info.st_mode);
+	bool is_file(const Stat &info) {
+		return S_ISREG(info.st_mode);
+	}
+#endif
+	time_t get_mtime(const Stat &info) {
+#ifdef __APPLE__
+		return info.st_mtimespec.tv_sec;
+#else
+	return info.st_mtime;
 #endif
+	}
 }
 
-bool is_file(const char *path) {
-#ifdef _WIN32
-	struct _stat info;
-	if (_stat(path, &info) != 0) {
+bool is_dir(const char *path) {
+	Stat info;
+	if (do_stat(path, info) != 0) {
 		return false;
 	}
-	return (info.st_mode & _S_IFREG) != 0;
-#else
-	struct stat info;
-	if (stat(path, &info) != 0) {
+	return is_dir(info);
+}
+
+bool is_file(const char *path) {
+	Stat info;
+	if (do_stat(path, info) != 0) {
 		return false;
 	}
-	return S_ISREG(info.st_mode);
-#endif
+	return is_file(info);
+}
+
+time_t file_mtime(const char *path) {
+	Stat info;
+	if (do_stat(path, info) != 0) {
+		return 0;
+	}
+	return get_mtime(info);
 }
 
 
@@ -52,7 +89,7 @@ bool make_dir(const char *path) {
 }
 
 
-bool make_dirs(const std::string &path) {
+bool make_dirs(const string &path) {
 	if (make_dir(path)) {
 		return true;
 	}
@@ -67,7 +104,7 @@ bool make_dirs(const std::string &path) {
 #else
 				auto pos = path.find_last_of('/');
 #endif
-				if (pos == std::string::npos) {
+				if (pos == string::npos) {
 					return false;
 				}
 				if (pos == path.length() - 1) {
@@ -77,7 +114,7 @@ bool make_dirs(const std::string &path) {
 #else
 					 pos = path.find_last_of('/', pos - 1);
 #endif
-					if (pos == std::string::npos) {
+					if (pos == string::npos) {
 						return false;
 					}
 				}
@@ -99,4 +136,114 @@ bool make_dirs(const std::string &path) {
 	}
 }
 
+
+bool remove_file(const string &path) {
+	return remove(path.c_str()) == 0;
+}
+
+
+bool remove_dir(const string &path) {
+#ifdef _WIN32
+
+	// shamelessly stolen from http://www.codeguru.com/forum/showthread.php?t=239271
+	const string pattern = path + "\\*.*";
+	WIN32_FIND_DATA info;
+	HANDLE file = FindFirstFile(pattern.c_str(), &info);
+	if (file == INVALID_HANDLE_VALUE) {
+		// already non-existing
+		return true;
+	}
+
+	do {
+		if (
+			strncmp(info.cFileName, ".", 2) == 0 ||
+			strncmp(info.cFileName, "..", 3) == 0
+		) {
+			continue;
+		}
+		const string sub_path = path + '\\' + info.cFileName;
+		if ((info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+			if (!remove_dir(sub_path)) {
+				return false;
+			}
+		} else {
+			if (!SetFileAttributes(sub_path.c_str(), FILE_ATTRIBUTE_NORMAL)) {
+				return false;
+			}
+			if (!remove_file(sub_path)) {
+				return false;
+			}
+		}
+	} while (FindNextFile(file, &info));
+	FindClose(file);
+
+	DWORD error = GetLastError();
+	if (error != ERROR_NO_MORE_FILES) {
+		return false;
+	}
+	// is this (NORMAL vs DIRECTORY) really correct?
+	if (!SetFileAttributes(path.c_str(), FILE_ATTRIBUTE_NORMAL)) {
+		return false;
+	}
+	return RemoveDirectory(path.c_str());
+
+#else
+
+	DIR *dir = opendir(path.c_str());
+	for (dirent *entry = readdir(dir); entry != nullptr; entry = readdir(dir)) {
+		if (
+			strncmp(entry->d_name, ".", 2) == 0 ||
+			strncmp(entry->d_name, "..", 3) == 0
+		) {
+			continue;
+		}
+		const string sub_path = path + '/' + entry->d_name;
+		if (is_dir(sub_path)) {
+			if (!remove_dir(sub_path)) {
+				return false;
+			}
+		} else {
+			if (!remove_file(sub_path)) {
+				return false;
+			}
+		}
+	}
+	return remove(path.c_str()) == 0;
+
+#endif
+}
+
+
+TempDir::TempDir() {
+#if _DEFAULT_SOURCE || _BSD_SOURCE || _POSIX_C_SOURCE >= 200809L
+	char tmpl[] = "blank.XXXXXX";
+	const char *name = mkdtemp(tmpl);
+	if (!name) {
+		throw runtime_error("unable to create temporary directory");
+	}
+	path = name;
+#else
+	char name[L_tmpnam];
+	tmpnam(name);
+	constexpr int max_tries = 10;
+	int tries = 0;
+	while (!make_dirs(name) && tries < max_tries) {
+		tmpnam(name);
+		++tries;
+	}
+	if (tries == max_tries) {
+		throw runtime_error("unable to create temporary directory");
+	}
+#endif
+	path = name;
+}
+
+TempDir::~TempDir() {
+	try {
+		remove_dir(path);
+	} catch (...) {
+		cerr << "warning: could not remove temp dir " << path << endl;
+	}
+}
+
 }