Diff: FATFileHandle.cpp

Revision:

0:8ea634413549

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FATFileHandle.cpp	Tue Feb 01 21:47:45 2011 +0000
@@ -0,0 +1,102 @@
+/* mbed Microcontroller Library - FATFileHandle
+ * Copyright (c) 2008, sford
+ */
+
+#include "FATFileHandle.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "ff.h"
+#include "FATFileSystem.h"
+
+namespace mbed {
+
+#if FFSDEBUG_ENABLED
+static const char *FR_ERRORS[] = {
+    "FR_OK = 0", 
+    "FR_NOT_READY",          
+    "FR_NO_FILE",              
+    "FR_NO_PATH",             
+    "FR_INVALID_NAME",     
+    "FR_INVALID_DRIVE",      
+    "FR_DENIED",              
+    "FR_EXIST",              
+    "FR_RW_ERROR",          
+    "FR_WRITE_PROTECTED", 
+    "FR_NOT_ENABLED",    
+    "FR_NO_FILESYSTEM",    
+    "FR_INVALID_OBJECT",    
+    "FR_MKFS_ABORTED"    
+};
+#endif
+
+FATFileHandle::FATFileHandle(FIL_t fh) { 
+    _fh = fh;
+}
+    
+int FATFileHandle::close() {
+    FFSDEBUG("close\n");
+    int retval = f_close(&_fh);
+    delete this;
+    return retval;
+}
+
+ssize_t FATFileHandle::write(const void* buffer, size_t length) {
+    FFSDEBUG("write(%d)\n", length);
+    UINT n;
+    FRESULT res = f_write(&_fh, buffer, length, &n);
+    if(res) { 
+        FFSDEBUG("f_write() failed (%d, %s)", res, FR_ERRORS[res]);
+        return -1;
+    }
+    return n;
+}
+        
+ssize_t FATFileHandle::read(void* buffer, size_t length) {
+    FFSDEBUG("read(%d)\n", length);
+    UINT n;
+    FRESULT res = f_read(&_fh, buffer, length, &n);
+    if(res) {
+        FFSDEBUG("f_read() failed (%d, %s)\n", res, FR_ERRORS[res]);
+        return -1;
+    }
+    return n;
+}
+        
+int FATFileHandle::isatty() {
+    return 0;
+}
+        
+off_t FATFileHandle::lseek(off_t position, int whence) {
+    FFSDEBUG("lseek(%i,%i)\n",position,whence);
+    if(whence == SEEK_END) {
+        position += _fh.fsize;
+    } else if(whence==SEEK_CUR) {
+        position += _fh.fptr;
+    }
+    FRESULT res = f_lseek(&_fh, position);
+    if(res) {
+        FFSDEBUG("lseek failed (%d, %s)\n", res, FR_ERRORS[res]);
+        return -1;
+    } else {
+        FFSDEBUG("lseek OK, returning %i\n", _fh.fptr);
+        return _fh.fptr;
+    }
+}
+        
+int FATFileHandle::fsync() {
+    FFSDEBUG("fsync()\n");
+    FRESULT res = f_sync(&_fh);
+    if (res) {
+        FFSDEBUG("f_sync() failed (%d, %s)\n", res, FR_ERRORS[res]);
+        return -1;
+    }
+    return 0;
+}
+
+off_t FATFileHandle::flen() {
+    FFSDEBUG("flen\n");
+    return _fh.fsize;
+}
+
+} // namespace mbed