From e24b4ec1a0fb3ba58a8ea67cd8d8affe3c5a0a71 Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Fri, 7 Aug 2015 15:04:47 +0200
Subject: [PATCH] (hopefully) cross-platform directory functions

---
 src/app/io.cpp | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/app/io.hpp | 22 +++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 src/app/io.cpp
 create mode 100644 src/app/io.hpp

diff --git a/src/app/io.cpp b/src/app/io.cpp
new file mode 100644
index 0000000..7996be6
--- /dev/null
+++ b/src/app/io.cpp
@@ -0,0 +1,75 @@
+#include "io.hpp"
+
+#include <cerrno>
+#ifdef _WIN32
+#  include <direct.h>
+#endif
+#include <sys/stat.h>
+
+
+namespace blank {
+
+bool is_dir(const char *path) {
+#ifdef _WIN32
+	struct _stat info;
+	if (_stat(path, &info) != 0) {
+		return false;
+	}
+	return (info.st_mode & _S_IFDIR) != 0;
+#else
+	struct stat info;
+	if (stat(path, &info) != 0) {
+		return false;
+	}
+	return (info.st_mode & S_IFDIR) != 0;
+#endif
+}
+
+
+bool make_dir(const char *path) {
+#ifdef _WIN32
+	int ret = _mkdir(path);
+#else
+	int ret = mkdir(path, 0777);
+#endif
+	return ret == 0;
+}
+
+
+bool make_dirs(const std::string &path) {
+	if (make_dir(path.c_str())) {
+		return true;
+	}
+
+	switch (errno) {
+
+		case ENOENT:
+			// missing component
+			{
+#ifdef _WIN32
+				auto pos = path.find_last_of("\\/");
+#else
+				auto pos = path.find_last_of('/');
+#endif
+				if (pos == std::string::npos) {
+					return false;
+				}
+				if (!make_dirs(path.substr(0, pos))) {
+					return false;
+				}
+			}
+			// try again
+			return make_dir(path.c_str());
+
+		case EEXIST:
+			// something's there, check if it's a dir and we're good
+			return is_dir(path.c_str());
+
+		default:
+			// whatever else went wrong, it can't be good
+			return false;
+
+	}
+}
+
+}
diff --git a/src/app/io.hpp b/src/app/io.hpp
new file mode 100644
index 0000000..4869238
--- /dev/null
+++ b/src/app/io.hpp
@@ -0,0 +1,22 @@
+#ifndef BLANK_APP_IO_HPP_
+#define BLANK_APP_IO_HPP_
+
+#include <string>
+
+
+namespace blank {
+
+/// check if give path points to an existing directory
+bool is_dir(const char *);
+
+/// create given directory
+/// @return true if the directory was created
+///         the directory might already exist, see errno
+bool make_dir(const char *);
+/// create given directory and all parents
+/// @return true if the directory was created or already exists
+bool make_dirs(const std::string &);
+
+}
+
+#endif
-- 
2.39.2