added the file/directory existence functions from Cppcheck

simplecpp.cpp

@@ -30,6 +30,7 @@
 #include <stack>
 #include <stdexcept>
 #include <string>
+#include <sys/stat.h>
 #if __cplusplus >= 201103L
 #ifdef SIMPLECPP_WINDOWS
 #include <mutex>
@@ -39,6 +40,12 @@
 #include <utility>
 #include <vector>
 
+#ifdef _WIN32
+using mode_t = unsigned short;
+#else
+#include <sys/types.h>
+#endif
+
 #ifdef SIMPLECPP_WINDOWS
 #include <windows.h>
 #undef ERROR
@@ -3756,6 +3763,24 @@ std::string simplecpp::getCppStdString(const std::string &std)
     return "";
 }
 
+static mode_t file_type(const std::string &path)
+{
+    struct stat file_stat;
+    if (stat(path.c_str(), &file_stat) == -1)
+        return 0;
+    return file_stat.st_mode & S_IFMT;
+}
+
+bool simplecpp::isFile(const std::string &path)
+{
+    return file_type(path) == S_IFREG;
+}
+
+bool simplecpp::isDirectory(const std::string &path)
+{
+    return file_type(path) == S_IFDIR;
+}
+
 #if (__cplusplus < 201103L) && !defined(__APPLE__)
 #undef nullptr
 #endif

simplecpp.h

@@ -363,6 +363,20 @@ namespace simplecpp {
 
     /** Returns the __cplusplus value for a given standard */
     SIMPLECPP_LIB std::string getCppStdString(const std::string &std);
+
+    /**
+     * @brief Checks if given path is a file
+     * @param path Path to be checked
+     * @return true if given path is a file
+     */
+    SIMPLECPP_LIB bool isFile(const std::string &path);
+
+    /**
+     * @brief Checks if a given path is a directory
+     * @param path Path to be checked
+     * @return true if given path is a directory
+     */
+    SIMPLECPP_LIB bool isDirectory(const std::string &path);
 }
 
 #if defined(_MSC_VER)