Correct return type of FileHandle::size()

File size should be off_t, not size_t.

features/filesystem/File.cpp

@@ -104,7 +104,7 @@ void File::rewind()
     return _fs->file_rewind(_file);
 }
 
-size_t File::size()
+off_t File::size()
 {
     MBED_ASSERT(_fs);
     return _fs->file_size(_file);

features/filesystem/File.h

@@ -124,7 +124,7 @@ public:
      *
      *  @return         Size of the file in bytes
      */
-    virtual size_t size();
+    virtual off_t size();
 
 private:
     FileSystem *_fs;

features/filesystem/FileSystem.cpp

@@ -45,10 +45,10 @@ void FileSystem::file_rewind(fs_file_t file)
     file_seek(file, 0, SEEK_SET);
 }
 
-size_t FileSystem::file_size(fs_file_t file)
+off_t FileSystem::file_size(fs_file_t file)
 {
     off_t off = file_tell(file);
-    size_t size = file_seek(file, 0, SEEK_END);
+    off_t size = file_seek(file, 0, SEEK_END);
     file_seek(file, off, SEEK_SET);
     return size;
 }

features/filesystem/FileSystem.h

@@ -175,7 +175,7 @@ protected:
      *  @param file     File handle
      *  @return         Size of the file in bytes
      */
-    virtual size_t file_size(fs_file_t file);
+    virtual off_t file_size(fs_file_t file);
 
     /** Open a directory on the filesystem
      *

features/filesystem/fat/FATFileSystem.cpp

@@ -508,11 +508,11 @@ off_t FATFileSystem::file_tell(fs_file_t file) {
     return res;
 }
 
-size_t FATFileSystem::file_size(fs_file_t file) {
+off_t FATFileSystem::file_size(fs_file_t file) {
     FIL *fh = static_cast<FIL*>(file);
 
     lock();
-    size_t res = fh->fsize;
+    off_t res = fh->fsize;
     unlock();
 
     return res;

features/filesystem/fat/FATFileSystem.h

@@ -179,7 +179,7 @@ protected:
      *  @param file     File handle
      *  @return         Size of the file in bytes
      */
-    virtual size_t file_size(fs_file_t file);
+    virtual off_t file_size(fs_file_t file);
 
     /** Open a directory on the filesystem
      *

platform/FileHandle.h

@@ -114,10 +114,10 @@ public:
      *
      *  @return         Size of the file in bytes
      */
-    virtual size_t size()
+    virtual off_t size()
     {
         off_t off = tell();
-        size_t size = seek(0, SEEK_END);
+        off_t size = seek(0, SEEK_END);
         seek(off, SEEK_SET);
         return size;
     }

platform/LocalFileSystem.cpp

@@ -164,7 +164,7 @@ int LocalFileHandle::sync() {
     return ret;
 }
 
-size_t LocalFileHandle::size() {
+off_t LocalFileHandle::size() {
     lock();
     off_t off = semihost_flen(_fh);
     unlock();

platform/LocalFileSystem.h

@@ -51,7 +51,7 @@ public:
 
     virtual int sync();
 
-    virtual size_t size();
+    virtual off_t size();
 
 protected:
     virtual void lock();

platform/Stream.cpp

@@ -119,7 +119,7 @@ int Stream::sync() {
     return 0;
 }
 
-size_t Stream::size() {
+off_t Stream::size() {
     return 0;
 }
 

platform/Stream.h

@@ -61,7 +61,7 @@ protected:
     virtual void rewind();
     virtual int isatty();
     virtual int sync();
-    virtual size_t size();
+    virtual off_t size();
 
     virtual int _putc(int c) = 0;
     virtual int _getc() = 0;