Software zum Installieren eines Smart-Mirror Frameworks , zum Nutzen von hochschulrelevanten Informationen, auf einem Raspberry-Pi.
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index.js 4.4KB

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  1. var Buffer = require('buffer').Buffer;
  2. var CRC_TABLE = [
  3. 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
  4. 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
  5. 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
  6. 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
  7. 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
  8. 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
  9. 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
  10. 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
  11. 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
  12. 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
  13. 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
  14. 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  15. 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
  16. 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
  17. 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
  18. 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
  19. 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
  20. 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
  21. 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
  22. 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
  23. 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
  24. 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
  25. 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
  26. 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  27. 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
  28. 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
  29. 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
  30. 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
  31. 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
  32. 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
  33. 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
  34. 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
  35. 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
  36. 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
  37. 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
  38. 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  39. 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
  40. 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
  41. 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
  42. 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
  43. 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
  44. 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
  45. 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
  46. 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
  47. 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
  48. 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
  49. 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
  50. 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  51. 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
  52. 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
  53. 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
  54. 0x2d02ef8d
  55. ];
  56. if (typeof Int32Array !== 'undefined') {
  57. CRC_TABLE = new Int32Array(CRC_TABLE);
  58. }
  59. function ensureBuffer(input) {
  60. if (Buffer.isBuffer(input)) {
  61. return input;
  62. }
  63. var hasNewBufferAPI =
  64. typeof Buffer.alloc === "function" &&
  65. typeof Buffer.from === "function";
  66. if (typeof input === "number") {
  67. return hasNewBufferAPI ? Buffer.alloc(input) : new Buffer(input);
  68. }
  69. else if (typeof input === "string") {
  70. return hasNewBufferAPI ? Buffer.from(input) : new Buffer(input);
  71. }
  72. else {
  73. throw new Error("input must be buffer, number, or string, received " +
  74. typeof input);
  75. }
  76. }
  77. function bufferizeInt(num) {
  78. var tmp = ensureBuffer(4);
  79. tmp.writeInt32BE(num, 0);
  80. return tmp;
  81. }
  82. function _crc32(buf, previous) {
  83. buf = ensureBuffer(buf);
  84. if (Buffer.isBuffer(previous)) {
  85. previous = previous.readUInt32BE(0);
  86. }
  87. var crc = ~~previous ^ -1;
  88. for (var n = 0; n < buf.length; n++) {
  89. crc = CRC_TABLE[(crc ^ buf[n]) & 0xff] ^ (crc >>> 8);
  90. }
  91. return (crc ^ -1);
  92. }
  93. function crc32() {
  94. return bufferizeInt(_crc32.apply(null, arguments));
  95. }
  96. crc32.signed = function () {
  97. return _crc32.apply(null, arguments);
  98. };
  99. crc32.unsigned = function () {
  100. return _crc32.apply(null, arguments) >>> 0;
  101. };
  102. module.exports = crc32;