From 1daba5b2fa044c1822d104fb65eeb88b6aeb5499 Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Fri, 9 Oct 2015 10:32:03 +0200
Subject: [PATCH] function to get mtime

---
 src/io/filesystem.cpp | 63 ++++++++++++++++++++++++++++++-------------
 src/io/filesystem.hpp |  6 +++++
 2 files changed, 50 insertions(+), 19 deletions(-)

diff --git a/src/io/filesystem.cpp b/src/io/filesystem.cpp
index 8a06d1c..1fd94a0 100644
--- a/src/io/filesystem.cpp
+++ b/src/io/filesystem.cpp
@@ -9,36 +9,61 @@
 
 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
+	std::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);
+}
+
+std::time_t file_mtime(const char *path) {
+	Stat info;
+	if (do_stat(path, info) != 0) {
+		return 0;
+	}
+	return get_mtime(info);
 }
 
 
diff --git a/src/io/filesystem.hpp b/src/io/filesystem.hpp
index 3829e0d..b69352a 100644
--- a/src/io/filesystem.hpp
+++ b/src/io/filesystem.hpp
@@ -1,6 +1,7 @@
 #ifndef BLANK_IO_FILESYSTEM_HPP_
 #define BLANK_IO_FILESYSTEM_HPP_
 
+#include <ctime>
 #include <string>
 
 
@@ -16,6 +17,11 @@ bool is_file(const char *);
 inline bool is_file(const std::string &s) {
 	return is_file(s.c_str());
 }
+/// get timestamp of last modification
+std::time_t file_mtime(const char *);
+inline std::time_t file_mtime(const std::string &s) {
+	return file_mtime(s.c_str());
+}
 
 /// create given directory
 /// @return true if the directory was created
-- 
2.39.2