Diff: mbed/LocalFileSystem.h

Revision:

2:99b1cb0d9f5e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed/LocalFileSystem.h	Tue Apr 18 16:02:40 2017 +0000
@@ -0,0 +1,86 @@
+/* mbed Microcontroller Library - LocalFileSystem
+ * Copyright (c) 2008-2009 ARM Limited. All rights reserved.
+ */ 
+ 
+#ifndef MBED_LOCALFILESYSTEM_H
+#define MBED_LOCALFILESYSTEM_H
+
+#include "FileSystemLike.h"
+
+namespace mbed {
+
+FILEHANDLE local_file_open(const char* name, int flags);
+
+class LocalFileHandle : public FileHandle {
+
+public:
+    LocalFileHandle(FILEHANDLE fh);
+    
+    virtual int close();
+    
+    virtual ssize_t write(const void *buffer, size_t length);
+    
+    virtual ssize_t read(void *buffer, size_t length);
+    
+    virtual int isatty();
+    
+    virtual off_t lseek(off_t position, int whence);
+    
+    virtual int fsync();
+    
+    virtual off_t flen();
+
+protected:
+    FILEHANDLE _fh;
+    int pos;
+};
+
+/* Class: LocalFileSystem
+ *  A filesystem for accessing the local mbed Microcontroller USB disk drive 
+ *
+ *  This allows programs to read and write files on the same disk drive that is used to program the 
+ *  mbed Microcontroller. Once created, the standard C file access functions are used to open, 
+ *  read and write files.
+ *
+ * Example:
+ * > #include "mbed.h"
+ * >
+ * > LocalFileSystem local("local");             // Create the local filesystem under the name "local"
+ * >
+ * > int main() {
+ * >     FILE *fp = fopen("/local/out.txt", "w");  // Open "out.txt" on the local file system for writing
+ * >     fprintf(fp, "Hello World!");              
+ * >     fclose(fp);                               
+ * >     remove("/local/out.txt");                 // Removes the file "out.txt" from the local file system
+ * >
+ * >     DIR *d = opendir("/local");               // Opens the root directory of the local file system
+ * >     struct dirent *p;
+ * >     while((p = readdir(d)) != NULL) {         // Print the names of the files in the local file system
+ * >       printf("%s\n", p->d_name);              // to stdout.
+ * >     }
+ * >     closedir(d);
+ * > }
+ *
+ * Implementation Notes:
+ *  If the microcontroller program makes an access to the local drive, it will be marked as "removed"
+ *  on the Host computer. This means it is no longer accessible from the Host Computer.
+ *
+ *  The drive will only re-appear when the microcontroller program exists. Note that if the program does
+ *  not exit, you will need to hold down reset on the mbed Microcontroller to be able to see the drive again!
+ */
+class LocalFileSystem : public FileSystemLike {
+
+public:
+
+    LocalFileSystem(const char* n) : FileSystemLike(n) {
+
+    }
+	
+    virtual FileHandle *open(const char* name, int flags);
+    virtual int remove(const char *filename);
+    virtual DirHandle *opendir(const char *name);
+};
+
+} // namespace mbed
+
+#endif