[Server] Add DoesFileExist() script function

apps/openmw-mp/Script/Functions/Miscellaneous.cpp

@@ -11,6 +11,11 @@ using namespace std;
 
 static std::string tempFilename;
 
+bool MiscellaneousFunctions::DoesFileExist(const char *filePath) noexcept
+{
+    return boost::filesystem::exists(filePath);
+}
+
 const char *MiscellaneousFunctions::GetCaseInsensitiveFilename(const char *folderPath, const char *filename) noexcept
 {
     if (!boost::filesystem::exists(folderPath)) return "invalid";

apps/openmw-mp/Script/Functions/Miscellaneous.hpp

@@ -4,6 +4,7 @@
 #include "../Types.hpp"
 
 #define MISCELLANEOUSAPI \
+    {"DoesFileExist",               MiscellaneousFunctions::DoesFileExist},\
     {"GetCaseInsensitiveFilename",  MiscellaneousFunctions::GetCaseInsensitiveFilename},\
     \
     {"GetLastPlayerId",             MiscellaneousFunctions::GetLastPlayerId},\
@@ -21,6 +22,17 @@ class MiscellaneousFunctions
 {
 public:
 
+    /**
+    * \brief Check whether a certain file exists.
+    *
+    * This will be a case sensitive check on case sensitive filesystems.
+    *
+    * Whenever you want to enforce case insensitivity, use GetCaseInsensitiveFilename() instead.
+    *
+    * \return Whether the file exists or not.
+    */
+    static bool DoesFileExist(const char *filePath) noexcept;
+
     /**
     * \brief Get the first filename in a folder that has a case insensitive match with the filename
     * argument.