Changeset 295 for cpp/frams/virtfile/virtfile.h

Timestamp:

01/15/15 22:43:01 (9 years ago)

Author:

Maciej Komosinski

Message:

Reorganizations and extensions of directory/file/filesystem IO classes

File:

• cpp/frams/virtfile/virtfile.h (modified) (5 diffs)

cpp/frams/virtfile/virtfile.h

@@ -9 +9 @@
 #include <stdarg.h>
 #include <common/nonstd_dir.h>
+#include <string>
+using std::string;
 //#include <dirent.h> //to jest inkludowane przez powyzsze 
 //struct dirent; //kiedys byla ta linia jak nie bylo jeszcze implementacji windowsowej dirent, ale borlandowi sie nie podoba jak s¹ obie
@@ -22 +24 @@
 class DLLEXP VirtFILE
 {
+  protected:
+string path;
   public:
 virtual size_t Vread(void *ptr, size_t size, size_t nmemb)=0;
@@ -36 +40 @@
 virtual int Vprintf(const char *format, va_list args);
 int printf(const char *format, ...);
-virtual const char *VgetPath() {return 0;} // 0=unspecified path
+virtual const char *VgetPath() {return path.c_str();}
 virtual int getSize();
+VirtFILE(const char* _path):path(_path) {}
 virtual ~VirtFILE();
 static VirtFILE *Vstdin,*Vstdout,*Vstderr;
@@ -48 +53 @@
 static VirtFileSystem *vfs;
 static void selectFileSystem(VirtFileSystem *s);
+};
+
+/** can be used directly or as a base class for implementations delegating VirtFILE calls to another VirtFILE object */
+class DLLEXP DelegatedFILE: public VirtFILE
+{
+VirtFILE *delegate;
+  public:
+size_t Vread(void *ptr, size_t size, size_t nmemb) {return delegate->Vread(ptr,size,nmemb);}
+size_t Vwrite(const void *ptr, size_t size, size_t nmemb) {return delegate->Vwrite(ptr,size,nmemb);}
+int Veof() {return delegate->Veof();}
+int Vputc(int c) {return delegate->Vputc(c);}
+int Vputs(const char *s) {return delegate->Vputs(s);}
+int Vgetc() {return delegate->Vgetc();}
+int Vseek(long offset, int whence) {return delegate->Vseek(offset,whence);}
+long Vtell() {return delegate->Vtell();}
+void Vrewind() {delegate->Vrewind();}
+int Vflush() {return delegate->Vflush();}
+char *Vgets(char *s, int size) {return delegate->Vgets(s,size);}
+int Vprintf(const char *format, va_list args) {return delegate->Vprintf(format,args);}
+int getSize() {return delegate->getSize();}
+// not overriden: VgetPath()
+
+DelegatedFILE(const char* _path,VirtFILE *_delegate):VirtFILE(_path),delegate(_delegate) {}
+virtual ~DelegatedFILE() {if (delegate) delete delegate; delegate=NULL;}
 };
 
@@ -61 +90 @@
 public:
 virtual VirtFILE *Vfopen(const char* path,const char*mode);
-virtual int Vfexists(const char* path);
+virtual bool Vfexists(const char* path);
 virtual VirtDIR *Vopendir(const char* path);
+virtual bool Vmkdir(const char* path);
+virtual bool Vmkdirs(const char* path);
+virtual bool Vdirexists(const char* path,bool is_writable);
 };
+
+/// base class for chained filesystems - redirect unimplemented calls -> chain
+class DLLEXP ChainFileSystem : public VirtFileSystem
+{
+public:
+        VirtFileSystem *chain;
+        ChainFileSystem(VirtFileSystem *_chain = NULL) :chain(_chain) {}
+        VirtFILE *Vfopen(const char* path, const char*mode);
+        bool Vfexists(const char* path);
+        VirtDIR *Vopendir(const char* path);
+        bool Vmkdir(const char* path);
+        bool Vmkdirs(const char* path);
+        bool Vdirexists(const char* path,bool is_writable);
+};
+
 
 DLLEXP VirtFILE *Vfopen(const char* path,const char*mode);
 DLLEXP VirtDIR *Vopendir(const char* path);
-DLLEXP int Vfexists(const char* path);
+DLLEXP bool Vfexists(const char* path);
+DLLEXP bool Vmkdir(const char* path);
+DLLEXP bool Vmkdirs(const char* path);
+DLLEXP bool Vdirexists(const char* path,bool is_writable);
 
 DLLEXP int fread(void *ptr, size_t size, size_t nmemb, VirtFILE* f);