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#include <stdlib.h> |
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#include <stdio.h> |
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/* |
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basemap[] works by storing a very small array that maps a base to |
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its complement, by dereferencing the array with the ASCII char's |
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decimal value as the index |
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(int) 'A' = 65; |
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(int) 'C' = 67; |
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(int) 'G' = 71; |
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(int) 'T' = 84; |
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(int) 'a' = 97; |
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(int) 'c' = 99; |
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(int) 'g' = 103; |
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(int) 't' = 116; |
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(int) 'N' = 78; |
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(int) 'U' = 85; |
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(int) 'u' = 117; |
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etc. |
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for example: basemap['A'] => basemap[65] => 'T' etc. |
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*/ |
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static const unsigned char basemap[256] = { |
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, |
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32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, |
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, |
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64, 'T', 'V', 'G', 'H', 'E', 'F', 'C', 'D', 'I', 'J', 'M', 'L', 'K', 'N', 'O', |
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'P', 'Q', 'Y', 'S', 'A', 'A', 'B', 'W', 'X', 'R', 'Z', 91, 92, 93, 94, 95, |
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96, 't', 'v', 'g', 'h', 'e', 'f', 'c', 'd', 'i', 'j', 'm', 'l', 'k', 'n', 'o', |
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'p', 'q', 'y', 's', 'a', 'a', 'b', 'w', 'x', 'r', 'z', 123, 124, 125, 126, 127, |
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128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, |
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144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, |
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160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, |
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176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, |
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192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, |
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208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, |
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224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, |
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240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 |
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}; |
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int |
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main(int argc, const char** argv) |
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{ |
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char* line = NULL; |
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size_t len = 0; |
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ssize_t read; |
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while ((read = getline(&line, &len, stdin)) != -1) { |
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for (int idx = read - 2; idx >= 0; --idx) { |
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fprintf(stdout, "%c", basemap[(int)line[idx]]); |
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} |
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fprintf(stdout, "\n"); |
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} |
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if (line) { |
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free(line); |
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line = NULL; |
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} |
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return EXIT_SUCCESS; |
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} |
Inputting DNA sequence by hand.. very convenient.
we can copy paste it atleast................
Just for fun, I made a Python version of the script (outputs reverse complement):
A 1-liner might look like: