Implement controls for file descriptor inheritance

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

diff --git a/source/io/file.h b/source/io/file.h
index 5fb0353211b2e99d23384afa2924e87ee78acc10..85075d0cca6e8709db663012ced369dd5f0cda52 100644 (file)
--- a/source/io/file.h
+++ b/source/io/file.h
@@ -15,12 +15,14 @@ class file_not_found: public std::runtime_error
 {
 public:
        file_not_found(const std::string &fn): std::runtime_error(fn) { }
+       ~file_not_found() throw() { }
 };
 
 class file_already_exists: public std::runtime_error
 {
 public:
        file_already_exists(const std::string &fn): std::runtime_error(fn) { }
+       ~file_already_exists() throw() { }
 };
 
 
@@ -50,9 +52,13 @@ public:
        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 = C_OVERWRITE);
+private:
+       void platform_init(const std::string &, CreateMode);
+public:
        virtual ~File();
 
-       void set_block(bool);
+       virtual void set_block(bool);
+       virtual void set_inherit(bool);
 
 protected:
        virtual unsigned do_write(const char *, unsigned);
@@ -76,7 +82,34 @@ inline File::CreateMode operator&(File::CreateMode m, File::CreateMode n)
 inline File::CreateMode operator~(File::CreateMode m)
 { return File::CreateMode(~static_cast<int>(m)); }
 
-typedef Filtered<File, Buffered> BufferedFile;
+
+class BufferedFile: public Seekable
+{
+private:
+       File file;
+       Buffered buffer;
+       SeekOffset position;
+
+public:
+       BufferedFile(const std::string &, Mode = M_READ, File::CreateMode = File::C_OVERWRITE);
+
+       virtual void set_block(bool);
+       virtual void set_inherit(bool);
+
+protected:
+       virtual unsigned do_write(const char *, unsigned);
+       virtual unsigned do_read(char *, unsigned);
+public:
+       virtual unsigned put(char);
+
+       virtual bool getline(std::string &);
+       virtual int get();
+
+       virtual const Handle &get_handle(Mode);
+
+       virtual SeekOffset seek(SeekOffset, SeekType);
+       virtual SeekOffset tell() const { return position; }
+};
 
 } // namespace IO
 } // namespace Msp