1 | /*
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2 | Copyright (c) 2013 Arduino LLC. All right reserved.
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3 |
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4 | This library is free software; you can redistribute it and/or
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5 | modify it under the terms of the GNU Lesser General Public
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6 | License as published by the Free Software Foundation; either
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7 | version 2.1 of the License, or (at your option) any later version.
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8 |
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9 | This library is distributed in the hope that it will be useful,
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 | Lesser General Public License for more details.
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13 |
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14 | You should have received a copy of the GNU Lesser General Public
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15 | License along with this library; if not, write to the Free Software
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16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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17 | */
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18 |
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19 | #include <FileIO.h>
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20 |
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21 |
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22 |
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23 | File::File(BridgeClass &b) : mode(255), bridge(b) {
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24 | // Empty
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25 | }
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26 |
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27 | File::File(const char *_filename, uint8_t _mode, BridgeClass &b) : mode(_mode), bridge(b) {
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28 | filename = _filename;
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29 | char modes[] = {'r', 'w', 'a'};
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30 | uint8_t cmd[] = {'F', modes[mode]};
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31 | uint8_t res[2];
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32 | dirPosition = 1;
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33 | bridge.transfer(cmd, 2, (uint8_t*)filename.c_str(), filename.length(), res, 2);
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34 | if (res[0] != 0) { // res[0] contains error code
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35 | mode = 255; // In case of error keep the file closed
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36 | return;
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37 | }
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38 | handle = res[1];
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39 | buffered = 0;
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40 | }
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41 |
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42 | File::operator bool() {
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43 | return (mode != 255);
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44 | }
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45 |
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46 | File::~File() {
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47 | close();
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48 | }
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49 |
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50 | size_t File::write(uint8_t c) {
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51 | return write(&c, 1);
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52 | }
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53 |
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54 | size_t File::write(const uint8_t *buf, size_t size) {
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55 | if (mode == 255)
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56 | return -1;
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57 | uint8_t cmd[] = {'g', handle};
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58 | uint8_t res[1];
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59 | bridge.transfer(cmd, 2, buf, size, res, 1);
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60 | if (res[0] != 0) // res[0] contains error code
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61 | return -res[0];
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62 | return size;
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63 | }
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64 |
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65 | int File::read() {
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66 | doBuffer();
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67 | if (buffered == 0)
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68 | return -1; // no chars available
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69 | else {
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70 | buffered--;
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71 | return buffer[readPos++];
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72 | }
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73 | }
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74 |
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75 | int File::peek() {
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76 | doBuffer();
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77 | if (buffered == 0)
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78 | return -1; // no chars available
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79 | else
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80 | return buffer[readPos];
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81 | }
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82 |
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83 | boolean File::seek(uint32_t position) {
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84 | uint8_t cmd[] = {
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85 | 's',
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86 | handle,
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87 | (position >> 24) & 0xFF,
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88 | (position >> 16) & 0xFF,
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89 | (position >> 8) & 0xFF,
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90 | position & 0xFF
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91 | };
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92 | uint8_t res[1];
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93 | bridge.transfer(cmd, 6, res, 1);
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94 | if (res[0] == 0) {
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95 | // If seek succeed then flush buffers
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96 | buffered = 0;
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97 | return true;
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98 | }
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99 | return false;
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100 | }
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101 |
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102 | uint32_t File::position() {
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103 | uint8_t cmd[] = {'S', handle};
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104 | uint8_t res[5];
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105 | bridge.transfer(cmd, 2, res, 5);
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106 | //err = res[0]; // res[0] contains error code
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107 | uint32_t pos = res[1] << 24;
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108 | pos += res[2] << 16;
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109 | pos += res[3] << 8;
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110 | pos += res[4];
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111 | return pos - buffered;
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112 | }
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113 |
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114 | void File::doBuffer() {
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115 | // If there are already char in buffer exit
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116 | if (buffered > 0)
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117 | return;
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118 |
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119 | // Try to buffer up to BUFFER_SIZE characters
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120 | readPos = 0;
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121 | uint8_t cmd[] = {'G', handle, BUFFER_SIZE - 1};
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122 | buffered = bridge.transfer(cmd, 3, buffer, BUFFER_SIZE);
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123 | //err = buff[0]; // First byte is error code
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124 | if (BridgeClass::TRANSFER_TIMEOUT == buffered || 0 == buffered) {
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125 | // transfer failed to retrieve any data
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126 | buffered = 0;
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127 | } else {
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128 | // transfer retrieved at least one byte of data so skip the error code character
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129 | readPos++;
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130 | buffered--;
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131 | }
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132 | }
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133 |
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134 | int File::available() {
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135 | // Look if there is new data available
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136 | doBuffer();
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137 | return buffered;
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138 | }
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139 |
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140 | void File::flush() {
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141 | }
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142 |
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143 | int File::read(void *buff, uint16_t nbyte) {
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144 | uint16_t n = 0;
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145 | uint8_t *p = reinterpret_cast<uint8_t *>(buff);
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146 | while (n < nbyte) {
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147 | if (buffered == 0) {
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148 | doBuffer();
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149 | if (buffered == 0)
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150 | break;
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151 | }
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152 | *p++ = buffer[readPos++];
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153 | buffered--;
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154 | n++;
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155 | }
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156 | return n;
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157 | }
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158 |
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159 | uint32_t File::size() {
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160 | if (bridge.getBridgeVersion() < 101)
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161 | return 0;
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162 | uint8_t cmd[] = {'t', handle};
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163 | uint8_t buff[5];
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164 | bridge.transfer(cmd, 2, buff, 5);
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165 | //err = res[0]; // First byte is error code
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166 | uint32_t res;
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167 | res = ((uint32_t)buff[1]) << 24;
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168 | res |= ((uint32_t)buff[2]) << 16;
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169 | res |= ((uint32_t)buff[3]) << 8;
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170 | res |= ((uint32_t)buff[4]);
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171 | return res;
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172 | }
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173 |
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174 | void File::close() {
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175 | if (mode == 255)
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176 | return;
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177 | uint8_t cmd[] = {'f', handle};
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178 | bridge.transfer(cmd, 2);
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179 | mode = 255;
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180 | }
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181 |
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182 | const char *File::name() {
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183 | return filename.c_str();
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184 | }
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185 |
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186 |
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187 | boolean File::isDirectory() {
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188 | uint8_t res[1];
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189 | uint8_t lenght;
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190 | uint8_t cmd[] = {'i'};
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191 | if (mode != 255)
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192 | return 0;
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193 |
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194 | bridge.transfer(cmd, 1, (uint8_t *)filename.c_str(), filename.length(), res, 1);
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195 | return res[0];
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196 | }
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197 |
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198 |
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199 | File File::openNextFile(uint8_t mode) {
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200 | Process awk;
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201 | char tmp;
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202 | String command;
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203 | String filepath;
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204 | if (dirPosition == 0xFFFF) return File();
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205 |
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206 | command = "ls ";
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207 | command += filename;
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208 | command += " | awk 'NR==";
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209 | command += dirPosition;
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210 | command += "'";
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211 |
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212 | awk.runShellCommand(command);
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213 |
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214 | while (awk.running());
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215 |
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216 | command = "";
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217 |
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218 | while (awk.available()) {
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219 | tmp = awk.read();
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220 | if (tmp != '\n') command += tmp;
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221 | }
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222 | if (command.length() == 0)
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223 | return File();
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224 | dirPosition++;
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225 | filepath = filename + "/" + command;
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226 | return File(filepath.c_str(), mode);
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227 |
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228 | }
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229 |
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230 | void File::rewindDirectory(void) {
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231 | dirPosition = 1;
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232 | }
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233 |
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234 |
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235 |
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236 |
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237 |
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238 |
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239 | boolean FileSystemClass::begin() {
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240 | return true;
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241 | }
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242 |
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243 | File FileSystemClass::open(const char *filename, uint8_t mode) {
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244 | return File(filename, mode);
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245 | }
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246 |
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247 | boolean FileSystemClass::exists(const char *filepath) {
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248 | Process ls;
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249 | ls.begin("ls");
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250 | ls.addParameter(filepath);
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251 | int res = ls.run();
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252 | return (res == 0);
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253 | }
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254 |
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255 | boolean FileSystemClass::mkdir(const char *filepath) {
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256 | Process mk;
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257 | mk.begin("mkdir");
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258 | mk.addParameter("-p");
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259 | mk.addParameter(filepath);
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260 | int res = mk.run();
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261 | return (res == 0);
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262 | }
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263 |
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264 | boolean FileSystemClass::remove(const char *filepath) {
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265 | Process rm;
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266 | rm.begin("rm");
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267 | rm.addParameter(filepath);
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268 | int res = rm.run();
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269 | return (res == 0);
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270 | }
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271 |
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272 | boolean FileSystemClass::rmdir(const char *filepath) {
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273 | Process rm;
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274 | rm.begin("rmdir");
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275 | rm.addParameter(filepath);
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276 | int res = rm.run();
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277 | return (res == 0);
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278 | }
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279 |
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280 | FileSystemClass FileSystem;
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