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/*
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];
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 isDirectory(void)
//File openNextFile(uint8_t mode = O_RDONLY);
//void rewindDirectory(void)
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;
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