Add some useful shortcuts for CreateMode combinations

[libs/core.git] / source / io / file.h

diff --git a/source/io/file.h b/source/io/file.h
index 430571f909d872854e64d11ac43917442541f121..5fb0353211b2e99d23384afa2924e87ee78acc10 100644 (file)
--- a/source/io/file.h
+++ b/source/io/file.h
@@ -17,6 +17,12 @@ public:
        file_not_found(const std::string &fn): std::runtime_error(fn) { }
 };
 
+class file_already_exists: public std::runtime_error
+{
+public:
+       file_already_exists(const std::string &fn): std::runtime_error(fn) { }
+};
+
 
 /**
 A class for reading and writing files.
@@ -30,7 +36,10 @@ public:
        {
                C_NONE = 0,
                C_CREATE = 1,
-               C_TRUNCATE = 2
+               C_TRUNCATE = 2,
+               C_OVERWRITE = C_CREATE+C_TRUNCATE,
+               C_EXCLUSIVE = 4,
+               C_NEW = C_CREATE+C_EXCLUSIVE
        };
 
 private:
@@ -40,7 +49,7 @@ public:
        /** Creates a new file object and opens it.  If the create flag is set and
        write access is requested and the file does exist, it is created.  Otherwise
        a missing file is an error. */
-       File(const std::string &, Mode = M_READ, CreateMode = CreateMode(C_CREATE+C_TRUNCATE));
+       File(const std::string &, Mode = M_READ, CreateMode = C_OVERWRITE);
        virtual ~File();
 
        void set_block(bool);