Bridge library to the 1.5 format

libraries/Bridge/src/FileIO.cpp

@@ -0,0 +1,250 @@
+/*
+  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;
+  char modes[] = {'r','w','a'};
+  uint8_t cmd[] = {'F', modes[mode]};
+  uint8_t res[2];
+  dirPosition = 1;
+  bridge.transfer(cmd, 2, (uint8_t*)filename.c_str(), filename.length(), res, 2);
+  if (res[0] != 0) { // res[0] contains error code
+    mode = 255; // In case of error keep the file closed
+    return;
+  }
+  handle = res[1];
+  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 cmd[] = {'g', handle};
+  uint8_t res[1];
+  bridge.transfer(cmd, 2, buf, size, res, 1);
+  if (res[0] != 0) // res[0] contains error code
+	return -res[0];
+  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 position) {
+  uint8_t cmd[] = {
+    's',
+    handle,
+    (position >> 24) & 0xFF,
+    (position >> 16) & 0xFF,
+    (position >> 8) & 0xFF,
+    position & 0xFF
+  };
+  uint8_t res[1];
+  bridge.transfer(cmd, 6, res, 1);
+  if (res[0]==0) {
+    // If seek succeed then flush buffers
+    buffered = 0;
+    return true;
+  }
+  return false;
+}
+
+uint32_t File::position() {
+  uint8_t cmd[] = {'S', handle};
+  uint8_t res[5];
+  bridge.transfer(cmd, 2, res, 5);
+  //err = res[0]; // res[0] contains error code
+  uint32_t pos = res[1] << 24;
+  pos += res[2] << 16;
+  pos += res[3] << 8;
+  pos += res[4];
+  return pos - buffered;
+}
+
+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 cmd[] = {'G', handle, sizeof(buffer)};
+  buffered = bridge.transfer(cmd, 3, buffer, sizeof(buffer)) - 1;
+  //err = buff[0]; // First byte is error code
+  if (buffered>0) {
+    // Shift the reminder of buffer
+    for (uint8_t i=0; i<buffered; i++)
+      buffer[i] = buffer[i+1];
+  }
+}
+
+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 size()
+
+void File::close() {
+  if (mode == 255)
+    return;
+  uint8_t cmd[] = {'f', handle};
+  bridge.transfer(cmd, 2);
+  mode = 255;
+}
+
+const char *File::name() {
+  return filename.c_str();
+}
+
+
+boolean File::isDirectory() {
+  uint8_t res[1];
+  uint8_t lenght;
+  uint8_t cmd[] = {'i'};
+  if (mode != 255)
+    return 0;
+
+  bridge.transfer(cmd, 1, (uint8_t *)filename.c_str(), filename.length(), res, 1);
+  return res[0];
+}
+
+
+File File::openNextFile(uint8_t mode){
+  Process awk;
+  char tmp;
+  String command;
+  String filepath;
+  if (dirPosition == 0xFFFF) return File();
+
+  command = "ls ";
+  command += filename;
+  command += " | awk 'NR==";
+  command += dirPosition;
+  command += "'";
+  
+  awk.runShellCommand(command);
+
+  while(awk.running()); 
+
+  command = "";
+
+  while (awk.available()){
+    tmp = awk.read();
+    if (tmp!='\n') command += tmp;
+  }
+  if (command.length() == 0)
+    return File();
+  dirPosition++;
+  filepath = filename + "/" + command;
+  return File(filepath.c_str(),mode);
+  
+} 
+
+void File::rewindDirectory(void){
+  dirPosition = 1;
+}
+
+
+
+
+
+
+boolean FileSystemClass::begin() {
+  return true;
+}
+
+File FileSystemClass::open(const char *filename, uint8_t mode) {
+  return File(filename, mode);
+}
+
+boolean FileSystemClass::exists(const char *filepath) {
+  Process ls;
+  ls.begin("ls");
+  ls.addParameter(filepath);
+  int res = ls.run();
+  return (res == 0);
+}
+
+boolean FileSystemClass::mkdir(const char *filepath) {
+  Process mk;
+  mk.begin("mkdir");
+  mk.addParameter("-p");
+  mk.addParameter(filepath);
+  int res = mk.run();
+  return (res == 0);
+}
+
+boolean FileSystemClass::remove(const char *filepath) {
+  Process rm;
+  rm.begin("rm");
+  rm.addParameter(filepath);
+  int res = rm.run();
+  return (res == 0);
+}
+
+boolean FileSystemClass::rmdir(const char *filepath) {
+  Process rm;
+  rm.begin("rmdir");
+  rm.addParameter(filepath);
+  int res = rm.run();
+  return (res == 0);
+}
+
+FileSystemClass FileSystem;