Bridge: Added File I/O

1 files changed, 173 insertions, 0 deletions

diff --git a/libraries/Bridge/FileIO.cpp b/libraries/Bridge/FileIO.cpp
new file mode 100644
index 0000000..04abc0d
--- /dev/null
+++ b/libraries/Bridge/FileIO.cpp
@@ -0,0 +1,173 @@
+/*
+  Copyright (c) 2013 Arduino LLC. All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include <FileIO.h>
+
+File::File(BridgeClass &b) : mode(255), bridge(b) {
+  // Empty
+}
+
+File::File(const char *_filename, uint8_t _mode, BridgeClass &b) : mode(_mode), bridge(b) {
+  filename = _filename;
+  uint8_t err;
+  char modes[] = {'r','w','a'};
+  handle = bridge.fileOpen(filename, modes[mode], err);
+  if (err != 0)
+    mode = 255; // In case of error keep the file closed
+  buffered = 0;
+}
+
+File::operator bool() {
+  return (mode != 255);
+}
+
+File::~File() {
+  close();
+}
+
+size_t File::write(uint8_t c) {
+  return write(&c, 1);
+}
+
+size_t File::write(const uint8_t *buf, size_t size) {
+  if (mode == 255)
+	return -1;
+  uint8_t err;
+  bridge.fileWrite(handle, buf, size, err);
+  if (err != 0)
+	return -err;
+  return size;
+}
+
+int File::read() {
+  doBuffer();
+  if (buffered == 0)
+    return -1; // no chars available
+  else {
+    buffered--;
+    return buffer[readPos++];
+  }
+}
+
+int File::peek() {
+  doBuffer();
+  if (buffered == 0)
+    return -1; // no chars available
+  else
+    return buffer[readPos];
+}
+
+boolean File::seek(uint32_t pos) {
+  uint8_t err;
+  bridge.fileSeek(handle, pos, err);
+  return err==0;
+}
+
+void File::doBuffer() {
+  // If there are already char in buffer exit
+  if (buffered > 0)
+    return;
+
+  // Try to buffer up to 32 characters
+  readPos = 0;
+  uint8_t err;
+  buffered = bridge.fileRead(handle, buffer, sizeof(buffer), err);
+}
+
+int File::available() {
+  // Look if there is new data available
+  doBuffer();
+  return buffered;
+}
+
+void File::flush() {
+}
+
+//int read(void *buf, uint16_t nbyte)
+//uint32_t position()
+//uint32_t size()
+
+void File::close() {
+  if (mode == 255)
+    return;
+  bridge.fileClose(handle);
+  mode = 255;
+}
+
+const char *File::name() {
+  return filename.c_str();
+}
+
+//boolean isDirectory(void)
+//File openNextFile(uint8_t mode = O_RDONLY);
+//void rewindDirectory(void)
+
+
+
+
+
+
+boolean SDClass::begin() {
+  return true;
+}
+
+File SDClass::open(const char *filename, uint8_t mode) {
+//  if (mode == FILE_READ) {
+//    if (exists(filename))
+//      return File(filename, mode);
+//  }
+//  if (mode == FILE_WRITE || mode == FILE_APPEND) {
+    return File(filename, mode);
+//  }
+//  return File();
+}
+
+boolean SDClass::exists(const char *filepath) {
+  Process ls;
+  ls.begin("ls");
+  ls.addParameter(filepath);
+  int res = ls.run();
+  return (res == 0);
+}
+
+boolean SDClass::mkdir(const char *filepath) {
+  Process mk;
+  mk.begin("mkdir");
+  mk.addParameter("-p");
+  mk.addParameter(filepath);
+  int res = mk.run();
+  return (res == 0);
+}
+
+boolean SDClass::remove(const char *filepath) {
+  Process rm;
+  rm.begin("rm");
+  rm.addParameter(filepath);
+  int res = rm.run();
+  return (res == 0);
+}
+
+boolean SDClass::rmdir(const char *filepath) {
+  Process rm;
+  rm.begin("rmdir");
+  rm.addParameter(filepath);
+  int res = rm.run();
+  return (res == 0);
+}
+
+SDClass SD;