1 | /*
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2 |
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3 | SD - a slightly more friendly wrapper for sdfatlib
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4 |
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5 | This library aims to expose a subset of SD card functionality
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6 | in the form of a higher level "wrapper" object.
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7 |
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8 | License: GNU General Public License V3
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9 | (Because sdfatlib is licensed with this.)
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10 |
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11 | (C) Copyright 2010 SparkFun Electronics
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12 |
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13 | */
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14 |
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15 | #include <SD.h>
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16 |
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17 | /* for debugging file open/close leaks
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18 | uint8_t nfilecount=0;
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19 | */
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20 |
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21 | File::File(SdFile f, const char *n) {
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22 | // oh man you are kidding me, new() doesnt exist? Ok we do it by hand!
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23 | _file = (SdFile *)malloc(sizeof(SdFile));
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24 | if (_file) {
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25 | memcpy(_file, &f, sizeof(SdFile));
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26 |
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27 | strncpy(_name, n, 12);
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28 | _name[12] = 0;
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29 |
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30 | /* for debugging file open/close leaks
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31 | nfilecount++;
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32 | Serial.print("Created \"");
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33 | Serial.print(n);
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34 | Serial.print("\": ");
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35 | Serial.println(nfilecount, DEC);
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36 | */
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37 | }
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38 | }
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39 |
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40 | File::File(void) {
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41 | _file = 0;
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42 | _name[0] = 0;
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43 | //Serial.print("Created empty file object");
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44 | }
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45 |
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46 | // returns a pointer to the file name
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47 | char *File::name(void) {
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48 | return _name;
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49 | }
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50 |
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51 | // a directory is a special type of file
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52 | boolean File::isDirectory(void) {
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53 | return (_file && _file->isDir());
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54 | }
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55 |
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56 |
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57 | size_t File::write(uint8_t val) {
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58 | return write(&val, 1);
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59 | }
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60 |
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61 | size_t File::write(const uint8_t *buf, size_t size) {
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62 | size_t t;
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63 | if (!_file) {
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64 | setWriteError();
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65 | return 0;
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66 | }
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67 | _file->clearWriteError();
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68 | t = _file->write(buf, size);
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69 | if (_file->getWriteError()) {
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70 | setWriteError();
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71 | return 0;
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72 | }
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73 | return t;
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74 | }
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75 |
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76 | int File::peek() {
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77 | if (! _file)
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78 | return 0;
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79 |
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80 | int c = _file->read();
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81 | if (c != -1) _file->seekCur(-1);
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82 | return c;
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83 | }
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84 |
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85 | int File::read() {
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86 | if (_file)
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87 | return _file->read();
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88 | return -1;
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89 | }
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90 |
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91 | // buffered read for more efficient, high speed reading
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92 | int File::read(void *buf, uint16_t nbyte) {
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93 | if (_file)
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94 | return _file->read(buf, nbyte);
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95 | return 0;
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96 | }
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97 |
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98 | int File::available() {
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99 | if (! _file) return 0;
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100 |
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101 | uint32_t n = size() - position();
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102 |
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103 | return n > 0X7FFF ? 0X7FFF : n;
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104 | }
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105 |
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106 | void File::flush() {
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107 | if (_file)
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108 | _file->sync();
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109 | }
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110 |
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111 | boolean File::seek(uint32_t pos) {
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112 | if (! _file) return false;
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113 |
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114 | return _file->seekSet(pos);
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115 | }
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116 |
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117 | uint32_t File::position() {
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118 | if (! _file) return -1;
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119 | return _file->curPosition();
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120 | }
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121 |
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122 | uint32_t File::size() {
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123 | if (! _file) return 0;
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124 | return _file->fileSize();
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125 | }
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126 |
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127 | void File::close() {
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128 | if (_file) {
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129 | _file->close();
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130 | free(_file);
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131 | _file = 0;
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132 |
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133 | /* for debugging file open/close leaks
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134 | nfilecount--;
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135 | Serial.print("Deleted ");
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136 | Serial.println(nfilecount, DEC);
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137 | */
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138 | }
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139 | }
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140 |
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141 | File::operator bool() {
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142 | if (_file)
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143 | return _file->isOpen();
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144 | return false;
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145 | }
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146 |
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