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Update formatting to consistently use tabs.
This commit is contained in:
Christoffer Lerno
@@ -4,37 +4,37 @@ module base64;
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errtype DecodingError
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{
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INVALID_CHARACTER
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INVALID_CHARACTER
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}
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const char[64] LUT_ENC = {
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
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'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
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'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
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'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
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'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
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'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
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'w', 'x', 'y', 'z', '0', '1', '2', '3',
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'4', '5', '6', '7', '8', '9', '+', '/',
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
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'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
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'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
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'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
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'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
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'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
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'w', 'x', 'y', 'z', '0', '1', '2', '3',
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'4', '5', '6', '7', '8', '9', '+', '/',
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};
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const char ERR = 0xFF;
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const char[256] LUT_DEC =
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{
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[0..255] = ERR,
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['A'] = 0, ['B'] = 1, ['C'] = 2, ['D'] = 3, ['E'] = 4,
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['F'] = 5, ['G'] = 6, ['H'] = 7, ['I'] = 8, ['J'] = 9,
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['K'] = 10, ['L'] = 11, ['M'] = 12, ['N'] = 13, ['O'] = 14,
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['P'] = 15, ['Q'] = 16, ['R'] = 17, ['S'] = 18, ['T'] = 19,
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['U'] = 20, ['V'] = 21, ['W'] = 22, ['X'] = 23, ['Y'] = 24,
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['Z'] = 25, ['a'] = 26, ['b'] = 27, ['c'] = 28, ['d'] = 29,
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['e'] = 30, ['f'] = 31, ['g'] = 32, ['h'] = 33, ['i'] = 34,
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['j'] = 35, ['k'] = 36, ['l'] = 37, ['m'] = 38, ['n'] = 39,
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['o'] = 40, ['p'] = 41, ['q'] = 42, ['r'] = 43, ['s'] = 44,
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['t'] = 45, ['u'] = 46, ['v'] = 47, ['w'] = 48, ['x'] = 49,
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['y'] = 50, ['z'] = 51, ['0'] = 52, ['1'] = 53, ['2'] = 54,
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['3'] = 55, ['4'] = 56, ['5'] = 57, ['6'] = 58, ['7'] = 59,
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['8'] = 60, ['9'] = 61, ['+'] = 62, ['/'] = 63
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[0..255] = ERR,
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['A'] = 0, ['B'] = 1, ['C'] = 2, ['D'] = 3, ['E'] = 4,
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['F'] = 5, ['G'] = 6, ['H'] = 7, ['I'] = 8, ['J'] = 9,
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['K'] = 10, ['L'] = 11, ['M'] = 12, ['N'] = 13, ['O'] = 14,
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['P'] = 15, ['Q'] = 16, ['R'] = 17, ['S'] = 18, ['T'] = 19,
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['U'] = 20, ['V'] = 21, ['W'] = 22, ['X'] = 23, ['Y'] = 24,
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['Z'] = 25, ['a'] = 26, ['b'] = 27, ['c'] = 28, ['d'] = 29,
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['e'] = 30, ['f'] = 31, ['g'] = 32, ['h'] = 33, ['i'] = 34,
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['j'] = 35, ['k'] = 36, ['l'] = 37, ['m'] = 38, ['n'] = 39,
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['o'] = 40, ['p'] = 41, ['q'] = 42, ['r'] = 43, ['s'] = 44,
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['t'] = 45, ['u'] = 46, ['v'] = 47, ['w'] = 48, ['x'] = 49,
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['y'] = 50, ['z'] = 51, ['0'] = 52, ['1'] = 53, ['2'] = 54,
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['3'] = 55, ['4'] = 56, ['5'] = 57, ['6'] = 58, ['7'] = 59,
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['8'] = 60, ['9'] = 61, ['+'] = 62, ['/'] = 63
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};
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@@ -45,90 +45,90 @@ const char LAST = 'z';
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fn void encode(char[] in, char *out)
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{
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int j = 0;
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char c = LUT_ENC[1];
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for (int i = 0; i < in.len; i++)
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char c = LUT_ENC[1];
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for (int i = 0; i < in.len; i++)
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{
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switch (i % 3)
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{
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case 0:
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out[j++] = LUT_ENC[(in[i] >> 2) & 0x3F];
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case 1:
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out[j++] = LUT_ENC[(in[i - 1] & 0x3) << 4 + ((in[i] >> 4) & 0xF)];
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case 2:
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out[j++] = LUT_ENC[(in[i - 1] & 0xF) << 2 + ((in[i] >> 6) & 0x3)];
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out[j++] = LUT_ENC[in[i] & 0x3F];
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}
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switch (i % 3)
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{
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case 0:
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out[j++] = LUT_ENC[(in[i] >> 2) & 0x3F];
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case 1:
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out[j++] = LUT_ENC[(in[i - 1] & 0x3) << 4 + ((in[i] >> 4) & 0xF)];
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case 2:
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out[j++] = LUT_ENC[(in[i - 1] & 0xF) << 2 + ((in[i] >> 6) & 0x3)];
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out[j++] = LUT_ENC[in[i] & 0x3F];
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}
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}
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// move back
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usize last = in.len - 1;
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// check the last and add padding
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switch (last % 3)
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{
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case 0:
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out[j++] = LUT_ENC[(in[last] & 0x3) << 4];
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out[j++] = PAD;
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out[j++] = PAD;
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case 1:
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out[j++] = LUT_ENC[(in[last] & 0xF) << 2];
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out[j++] = PAD;
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}
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// move back
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usize last = in.len - 1;
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// check the last and add padding
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switch (last % 3)
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{
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case 0:
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out[j++] = LUT_ENC[(in[last] & 0x3) << 4];
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out[j++] = PAD;
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out[j++] = PAD;
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case 1:
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out[j++] = LUT_ENC[(in[last] & 0xF) << 2];
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out[j++] = PAD;
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}
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}
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fn int! decode(char[] in, char* out, int* invalid_char_index = null)
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{
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int j = 0;
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int j = 0;
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for (int i = 0; i < in.len; i++)
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{
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char value = in[i];
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if (value == PAD) return j;
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for (int i = 0; i < in.len; i++)
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{
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char value = in[i];
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if (value == PAD) return j;
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char c = LUT_DEC[in[i]];
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if (c == ERR)
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{
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if (invalid_char_index) *invalid_char_index = i;
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return DecodingError.INVALID_CHARACTER!;
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}
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char c = LUT_DEC[in[i]];
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if (c == ERR)
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{
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if (invalid_char_index) *invalid_char_index = i;
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return DecodingError.INVALID_CHARACTER!;
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}
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switch (i % 4)
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{
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case 0:
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out[j] = c << 2;
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case 1:
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out[j++] += c >> 4 & 0x3;
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// if not last char with padding
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if (i < (in.len - 3) || in[(long)(in.len) - 2] != PAD)
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{
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out[j] = (c & 0xF) << 4;
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}
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case 2:
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out[j++] += c >> 2 & 0xF;
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if (i < (in.len - 2) || in[(long)(in.len) - 1] != PAD)
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{
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out[j] = (c & 0x3) << 6;
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}
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case 3:
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out[j++] += c;
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}
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switch (i % 4)
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{
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case 0:
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out[j] = c << 2;
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case 1:
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out[j++] += c >> 4 & 0x3;
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// if not last char with padding
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if (i < (in.len - 3) || in[(long)(in.len) - 2] != PAD)
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{
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out[j] = (c & 0xF) << 4;
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}
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case 2:
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out[j++] += c >> 2 & 0xF;
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if (i < (in.len - 2) || in[(long)(in.len) - 1] != PAD)
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{
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out[j] = (c & 0x3) << 6;
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}
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case 3:
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out[j++] += c;
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}
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}
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return j;
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}
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return j;
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}
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extern fn void printf(char *fmt, ...);
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fn void main()
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{
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char *helloworld = "Hello World\n";
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char[1000] buffer;
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encode(helloworld[0..12], &buffer);
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printf("Result: %s\n", &buffer);
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char *to_decode = "aGVsbG8gd29ybGRcMA==";
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char[*] result = b64"aGVsbG8gd29ybGRcMA==";
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decode(to_decode[0..19], &buffer);
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printf("Result: %s\n", &buffer);
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printf("Result direct: %.*s\n", 13, &result);
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char *helloworld = "Hello World\n";
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char[1000] buffer;
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encode(helloworld[0..12], &buffer);
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printf("Result: %s\n", &buffer);
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char *to_decode = "aGVsbG8gd29ybGRcMA==";
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char[*] result = b64"aGVsbG8gd29ybGRcMA==";
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decode(to_decode[0..19], &buffer);
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printf("Result: %s\n", &buffer);
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printf("Result direct: %.*s\n", 13, &result);
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}
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@@ -1,16 +1,16 @@
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macro int factorial($n)
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{
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$if ($n == 0):
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return 1;
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$else:
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return $n * @factorial($n - 1);
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$endif;
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$if ($n == 0):
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return 1;
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$else:
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return $n * @factorial($n - 1);
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$endif;
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}
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extern fn void printf(char *fmt, ...);
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fn void main()
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{
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int x = @factorial(12);
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printf("12! = %d\n", x);
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int x = @factorial(12);
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printf("12! = %d\n", x);
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}
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@@ -5,76 +5,76 @@ import std::mem;
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macro int max(int a, int b)
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{
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return a > b ? a : b;
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return a > b ? a : b;
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}
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fn int fannkuchredux(int n)
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{
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int* perm = @array::make(int, n);
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int* perm1 = @array::make(int, n);
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int* count = @array::make(int, n);
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int max_flips_count;
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int perm_count;
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int checksum;
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int* perm = @array::make(int, n);
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int* perm1 = @array::make(int, n);
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int* count = @array::make(int, n);
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int max_flips_count;
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int perm_count;
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int checksum;
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for (int i = 0; i < n; i++) perm1[i] = i;
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for (int i = 0; i < n; i++) perm1[i] = i;
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int r = n;
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int r = n;
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while (1)
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{
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for (; r != 1; r--) count[r - 1] = r;
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while (1)
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{
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for (; r != 1; r--) count[r - 1] = r;
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for (int i = 0; i < n; i++) perm[i] = perm1[i];
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for (int i = 0; i < n; i++) perm[i] = perm1[i];
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int flips_count = 0;
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int k;
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int flips_count = 0;
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int k;
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while (!((k = perm[0]) == 0))
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{
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int k2 = (k + 1) >> 1;
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for (int i = 0; i < k2; i++)
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{
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int temp = perm[i];
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perm[i] = perm[k - i];
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perm[k - i] = temp;
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}
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flips_count++;
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}
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while (!((k = perm[0]) == 0))
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{
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int k2 = (k + 1) >> 1;
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for (int i = 0; i < k2; i++)
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{
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int temp = perm[i];
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perm[i] = perm[k - i];
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perm[k - i] = temp;
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}
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flips_count++;
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}
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max_flips_count = @max(max_flips_count, flips_count);
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checksum += perm_count % 2 == 0 ? flips_count : -flips_count;
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max_flips_count = @max(max_flips_count, flips_count);
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checksum += perm_count % 2 == 0 ? flips_count : -flips_count;
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/* Use incremental change to generate another permutation */
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while (1)
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{
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if (r == n)
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{
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libc::printf("%d\n", checksum);
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return max_flips_count;
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}
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/* Use incremental change to generate another permutation */
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while (1)
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{
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if (r == n)
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{
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libc::printf("%d\n", checksum);
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return max_flips_count;
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}
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int perm0 = perm1[0];
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int i = 0;
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while (i < r)
|
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{
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int j = i + 1;
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perm1[i] = perm1[j];
|
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i = j;
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}
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perm1[r] = perm0;
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count[r] = count[r] - 1;
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if (count[r] > 0) break;
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r++;
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}
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perm_count++;
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}
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return 0;
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int perm0 = perm1[0];
|
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int i = 0;
|
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while (i < r)
|
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{
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int j = i + 1;
|
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perm1[i] = perm1[j];
|
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i = j;
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}
|
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perm1[r] = perm0;
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count[r] = count[r] - 1;
|
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if (count[r] > 0) break;
|
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r++;
|
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}
|
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perm_count++;
|
||||
}
|
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return 0;
|
||||
}
|
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|
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fn int main(int argc, char** argv)
|
||||
{
|
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int n = argc > 1 ? libc::atoi(argv[1]) : 7;
|
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libc::printf("Pfannkuchen(%d) = %d\n", n, fannkuchredux(n));
|
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return 0;
|
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int n = argc > 1 ? libc::atoi(argv[1]) : 7;
|
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libc::printf("Pfannkuchen(%d) = %d\n", n, fannkuchredux(n));
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return 0;
|
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}
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@@ -15,39 +15,39 @@ fn float fasta_rand(float max)
|
||||
}
|
||||
|
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private char[] alu =
|
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"GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGG"
|
||||
"GAGGCCGAGGCGGGCGGATCACCTGAGGTCAGGAGTTCGAGA"
|
||||
"CCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACTAAAAAT"
|
||||
"ACAAAAATTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCA"
|
||||
"GCTACTCGGGAGGCTGAGGCAGGAGAATCGCTTGAACCCGGG"
|
||||
"AGGCGGAGGTTGCAGTGAGCCGAGATCGCGCCACTGCACTCC"
|
||||
"AGCCTGGGCGACAGAGCGAGACTCCGTCTCAAAAA";
|
||||
"GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGG"
|
||||
"GAGGCCGAGGCGGGCGGATCACCTGAGGTCAGGAGTTCGAGA"
|
||||
"CCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACTAAAAAT"
|
||||
"ACAAAAATTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCA"
|
||||
"GCTACTCGGGAGGCTGAGGCAGGAGAATCGCTTGAACCCGGG"
|
||||
"AGGCGGAGGTTGCAGTGAGCCGAGATCGCGCCACTGCACTCC"
|
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"AGCCTGGGCGACAGAGCGAGACTCCGTCTCAAAAA";
|
||||
|
||||
|
||||
char[] iub = "acgtBDHKMNRSVWY";
|
||||
double[] iub_p = {
|
||||
0.27,
|
||||
0.12,
|
||||
0.12,
|
||||
0.27,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02 };
|
||||
0.27,
|
||||
0.12,
|
||||
0.12,
|
||||
0.27,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02,
|
||||
0.02 };
|
||||
|
||||
char[] homosapiens = "acgt";
|
||||
double[] homosapiens_p = {
|
||||
0.3029549426680,
|
||||
0.1979883004921,
|
||||
0.1975473066391,
|
||||
0.3015094502008
|
||||
0.3029549426680,
|
||||
0.1979883004921,
|
||||
0.1975473066391,
|
||||
0.3015094502008
|
||||
};
|
||||
|
||||
const LINELEN = 60;
|
||||
|
||||
@@ -11,10 +11,10 @@ extern fn void usleep(int time);
|
||||
|
||||
struct GameBoard
|
||||
{
|
||||
int h;
|
||||
int w;
|
||||
char* world;
|
||||
char* temp;
|
||||
int h;
|
||||
int w;
|
||||
char* world;
|
||||
char* temp;
|
||||
}
|
||||
|
||||
fn void GameBoard.show(GameBoard *board)
|
||||
@@ -24,11 +24,11 @@ fn void GameBoard.show(GameBoard *board)
|
||||
char* current = board.world;
|
||||
for (int y = 0; y < board.h; y++)
|
||||
{
|
||||
for (int x = 0; x < board.w; x++)
|
||||
{
|
||||
printf(*current ? "\e[07m \e[m" : " ");
|
||||
current++;
|
||||
}
|
||||
for (int x = 0; x < board.w; x++)
|
||||
{
|
||||
printf(*current ? "\e[07m \e[m" : " ");
|
||||
current++;
|
||||
}
|
||||
printf("\e[E");
|
||||
}
|
||||
fflush(__stdoutp);
|
||||
@@ -38,25 +38,25 @@ fn void GameBoard.evolve(GameBoard *board)
|
||||
{
|
||||
for (int y = 0; y < board.h; y++)
|
||||
{
|
||||
for (int x = 0; x < board.w; x++)
|
||||
{
|
||||
int n = 0;
|
||||
for (int y1 = y - 1; y1 <= y + 1; y1++)
|
||||
{
|
||||
for (int x1 = x - 1; x1 <= x + 1; x1++)
|
||||
{
|
||||
int actualX = (x1 + board.w) % board.w;
|
||||
int actualY = (y1 + board.h) % board.h;
|
||||
if (board.world[actualX + actualY * board.w]) n++;
|
||||
}
|
||||
}
|
||||
if (board.world[x + y * board.w]) n--;
|
||||
board.temp[x + y * board.w] = (char)(n == 3 || (n == 2 && board.world[x + y * board.w]));
|
||||
}
|
||||
for (int x = 0; x < board.w; x++)
|
||||
{
|
||||
int n = 0;
|
||||
for (int y1 = y - 1; y1 <= y + 1; y1++)
|
||||
{
|
||||
for (int x1 = x - 1; x1 <= x + 1; x1++)
|
||||
{
|
||||
int actualX = (x1 + board.w) % board.w;
|
||||
int actualY = (y1 + board.h) % board.h;
|
||||
if (board.world[actualX + actualY * board.w]) n++;
|
||||
}
|
||||
}
|
||||
if (board.world[x + y * board.w]) n--;
|
||||
board.temp[x + y * board.w] = (char)(n == 3 || (n == 2 && board.world[x + y * board.w]));
|
||||
}
|
||||
}
|
||||
for (int i = 0; i < board.w * board.h; i++)
|
||||
{
|
||||
board.world[i] = board.temp[i];
|
||||
board.world[i] = board.temp[i];
|
||||
}
|
||||
}
|
||||
|
||||
@@ -70,17 +70,17 @@ fn int main(int c, char** v)
|
||||
if (w <= 0) w = 30;
|
||||
if (h <= 0) h = 30;
|
||||
|
||||
GameBoard board;
|
||||
board.w = w;
|
||||
board.h = h;
|
||||
board.world = malloc((ulong)(h * w));
|
||||
board.temp = malloc((ulong)(h * w));
|
||||
GameBoard board;
|
||||
board.w = w;
|
||||
board.h = h;
|
||||
board.world = malloc((ulong)(h * w));
|
||||
board.temp = malloc((ulong)(h * w));
|
||||
|
||||
for (int i = h * w - 1; i >= 0; i--)
|
||||
{
|
||||
board.world[i] = rand() % 10 == 0 ? 1 : 0;
|
||||
}
|
||||
for (int j = 0; j < 1000; j++)
|
||||
for (int i = h * w - 1; i >= 0; i--)
|
||||
{
|
||||
board.world[i] = rand() % 10 == 0 ? 1 : 0;
|
||||
}
|
||||
for (int j = 0; j < 1000; j++)
|
||||
{
|
||||
board.show();
|
||||
board.evolve();
|
||||
|
||||
@@ -8,88 +8,88 @@ extern fn isize getline(char** linep, usize* linecapp, CFile stream);
|
||||
|
||||
struct Game
|
||||
{
|
||||
int answer;
|
||||
bool done;
|
||||
int guesses;
|
||||
int high;
|
||||
int answer;
|
||||
bool done;
|
||||
int guesses;
|
||||
int high;
|
||||
}
|
||||
|
||||
optnum InputResult
|
||||
{
|
||||
NOT_AN_INT,
|
||||
FAILED_TO_READ,
|
||||
NOT_AN_INT,
|
||||
FAILED_TO_READ,
|
||||
}
|
||||
|
||||
int err_count = 0;
|
||||
|
||||
fn int! askGuess(int high)
|
||||
{
|
||||
printf("Guess a number between 1 and %d: ", high);
|
||||
char[] text = readLine()?;
|
||||
char* end = null;
|
||||
int value = (int)libc::strtol(text.ptr, &end, 10);
|
||||
if (end && end[0] >= ' ') return InputResult.NOT_AN_INT!;
|
||||
return value;
|
||||
printf("Guess a number between 1 and %d: ", high);
|
||||
char[] text = readLine()?;
|
||||
char* end = null;
|
||||
int value = (int)libc::strtol(text.ptr, &end, 10);
|
||||
if (end && end[0] >= ' ') return InputResult.NOT_AN_INT!;
|
||||
return value;
|
||||
}
|
||||
|
||||
fn char[]! readLine()
|
||||
{
|
||||
char* chars = mem::talloc(1024)?;
|
||||
isize loaded = getline(&chars, &&(usize)1023, @libc::stdin());
|
||||
if (loaded < 0) return InputResult.FAILED_TO_READ!;
|
||||
chars[loaded] = 0;
|
||||
return chars[0..(loaded - 1)];
|
||||
char* chars = mem::talloc(1024)?;
|
||||
isize loaded = getline(&chars, &&(usize)1023, @libc::stdin());
|
||||
if (loaded < 0) return InputResult.FAILED_TO_READ!;
|
||||
chars[loaded] = 0;
|
||||
return chars[0..(loaded - 1)];
|
||||
}
|
||||
|
||||
fn int! askGuessMulti(int high)
|
||||
{
|
||||
while (true)
|
||||
{
|
||||
int! result = askGuess(high);
|
||||
if (catch(result) == InputResult.NOT_AN_INT)
|
||||
{
|
||||
printf("I didn't understand that.\n");
|
||||
err_count++;
|
||||
continue;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
$unreachable;
|
||||
while (true)
|
||||
{
|
||||
int! result = askGuess(high);
|
||||
if (catch(result) == InputResult.NOT_AN_INT)
|
||||
{
|
||||
printf("I didn't understand that.\n");
|
||||
err_count++;
|
||||
continue;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
$unreachable;
|
||||
}
|
||||
|
||||
fn void! Game.play(Game *game)
|
||||
{
|
||||
while (!game.done)
|
||||
{
|
||||
int guess = askGuessMulti(game.high)?;
|
||||
game.report(guess);
|
||||
game.update(guess);
|
||||
}
|
||||
while (!game.done)
|
||||
{
|
||||
int guess = askGuessMulti(game.high)?;
|
||||
game.report(guess);
|
||||
game.update(guess);
|
||||
}
|
||||
}
|
||||
|
||||
fn void Game.report(Game *game, int guess)
|
||||
{
|
||||
char[] desc = {|
|
||||
if (guess < game.answer) return "too low";
|
||||
if (guess > game.answer) return "too high";
|
||||
return "the answer";
|
||||
|};
|
||||
printf("%d is %.*s.\n", guess, (int)desc.len, desc.ptr);
|
||||
char[] desc = {|
|
||||
if (guess < game.answer) return "too low";
|
||||
if (guess > game.answer) return "too high";
|
||||
return "the answer";
|
||||
|};
|
||||
printf("%d is %.*s.\n", guess, (int)desc.len, desc.ptr);
|
||||
}
|
||||
|
||||
fn void Game.update(Game *game, int guess)
|
||||
{
|
||||
if (guess == game.answer) game.done = true;
|
||||
game.guesses++;
|
||||
if (guess == game.answer) game.done = true;
|
||||
game.guesses++;
|
||||
}
|
||||
|
||||
fn void! main()
|
||||
{
|
||||
libc::srand((int)libc::clock());
|
||||
int high = 100;
|
||||
int answer = libc::rand() % high + 1;
|
||||
Game game = { .answer = answer, .high = high };
|
||||
game.play();
|
||||
printf("Finished in %d guesses.\n", game.guesses);
|
||||
printf("Total input errors: %d.\n", err_count);
|
||||
libc::srand((int)libc::clock());
|
||||
int high = 100;
|
||||
int answer = libc::rand() % high + 1;
|
||||
Game game = { .answer = answer, .high = high };
|
||||
game.play();
|
||||
printf("Finished in %d guesses.\n", game.guesses);
|
||||
printf("Total input errors: %d.\n", err_count);
|
||||
}
|
||||
@@ -4,23 +4,23 @@ import std::math;
|
||||
// This levenshtein exercises C3 subarrays.
|
||||
fn int levenshtein(char[] s, char[] t)
|
||||
{
|
||||
// if either string is empty, difference is inserting all chars
|
||||
// from the other
|
||||
if (!s.len) return t.len;
|
||||
if (!t.len) return s.len;
|
||||
// if either string is empty, difference is inserting all chars
|
||||
// from the other
|
||||
if (!s.len) return t.len;
|
||||
if (!t.len) return s.len;
|
||||
|
||||
// if last letters are the same, the difference is whatever is
|
||||
// required to edit the rest of the strings
|
||||
if (s[^1] == t[^1]) return levenshtein(s[0..^2], t[0..^2]);
|
||||
// if last letters are the same, the difference is whatever is
|
||||
// required to edit the rest of the strings
|
||||
if (s[^1] == t[^1]) return levenshtein(s[0..^2], t[0..^2]);
|
||||
|
||||
// else try:
|
||||
// changing last letter of s to that of t; or
|
||||
// remove last letter of s; or
|
||||
// remove last letter of t,
|
||||
// any of which is 1 edit plus editing the rest of the strings
|
||||
int a = levenshtein(s[0..^2], t[0..^2]);
|
||||
int b = levenshtein(s, t[0..^2]);
|
||||
int c = levenshtein(s[0..^2], t);
|
||||
// else try:
|
||||
// changing last letter of s to that of t; or
|
||||
// remove last letter of s; or
|
||||
// remove last letter of t,
|
||||
// any of which is 1 edit plus editing the rest of the strings
|
||||
int a = levenshtein(s[0..^2], t[0..^2]);
|
||||
int b = levenshtein(s, t[0..^2]);
|
||||
int c = levenshtein(s[0..^2], t);
|
||||
|
||||
return @min(@min(a, b), c) + 1;
|
||||
return @min(@min(a, b), c) + 1;
|
||||
}
|
||||
@@ -8,116 +8,116 @@ const RECIP_DT = (1.0/DT);
|
||||
|
||||
struct Planet
|
||||
{
|
||||
double x, y, z;
|
||||
double vx, vy, vz;
|
||||
double mass;
|
||||
double x, y, z;
|
||||
double vx, vy, vz;
|
||||
double mass;
|
||||
}
|
||||
|
||||
fn void advance(Planet[] bodies) @noinline
|
||||
{
|
||||
usize nbodies = bodies.len;
|
||||
foreach (i, Planet* &b : bodies)
|
||||
{
|
||||
for (usize j = i + 1; j < nbodies; j++)
|
||||
{
|
||||
Planet* b2 = &bodies[j];
|
||||
double dx = b.x - b2.x;
|
||||
double dy = b.y - b2.y;
|
||||
double dz = b.z - b2.z;
|
||||
double inv_distance = 1.0/sqrt(dx * dx + dy * dy + dz * dz);
|
||||
double mag = inv_distance * inv_distance * inv_distance;
|
||||
b.vx -= dx * b2.mass * mag;
|
||||
b.vy -= dy * b2.mass * mag;
|
||||
b.vz -= dz * b2.mass * mag;
|
||||
b2.vx += dx * b.mass * mag;
|
||||
b2.vy += dy * b.mass * mag;
|
||||
b2.vz += dz * b.mass * mag;
|
||||
}
|
||||
}
|
||||
foreach (&b : bodies)
|
||||
{
|
||||
b.x += b.vx;
|
||||
b.y += b.vy;
|
||||
b.z += b.vz;
|
||||
}
|
||||
usize nbodies = bodies.len;
|
||||
foreach (i, Planet* &b : bodies)
|
||||
{
|
||||
for (usize j = i + 1; j < nbodies; j++)
|
||||
{
|
||||
Planet* b2 = &bodies[j];
|
||||
double dx = b.x - b2.x;
|
||||
double dy = b.y - b2.y;
|
||||
double dz = b.z - b2.z;
|
||||
double inv_distance = 1.0/sqrt(dx * dx + dy * dy + dz * dz);
|
||||
double mag = inv_distance * inv_distance * inv_distance;
|
||||
b.vx -= dx * b2.mass * mag;
|
||||
b.vy -= dy * b2.mass * mag;
|
||||
b.vz -= dz * b2.mass * mag;
|
||||
b2.vx += dx * b.mass * mag;
|
||||
b2.vy += dy * b.mass * mag;
|
||||
b2.vz += dz * b.mass * mag;
|
||||
}
|
||||
}
|
||||
foreach (&b : bodies)
|
||||
{
|
||||
b.x += b.vx;
|
||||
b.y += b.vy;
|
||||
b.z += b.vz;
|
||||
}
|
||||
}
|
||||
|
||||
fn double energy(Planet[] bodies)
|
||||
{
|
||||
double e;
|
||||
usize nbodies = bodies.len;
|
||||
double e;
|
||||
usize nbodies = bodies.len;
|
||||
|
||||
foreach (i, Planet* &b : bodies)
|
||||
{
|
||||
e += 0.5 * b.mass * (b.vx * b.vx + b.vy * b.vy + b.vz * b.vz);
|
||||
for (usize j = i + 1; j < nbodies; j++)
|
||||
{
|
||||
Planet* b2 = &bodies[j];
|
||||
double dx = b.x - b2.x;
|
||||
double dy = b.y - b2.y;
|
||||
double dz = b.z - b2.z;
|
||||
double distance = sqrt(dx * dx + dy * dy + dz * dz);
|
||||
e -= (b.mass * b2.mass) / distance;
|
||||
}
|
||||
}
|
||||
return e;
|
||||
foreach (i, Planet* &b : bodies)
|
||||
{
|
||||
e += 0.5 * b.mass * (b.vx * b.vx + b.vy * b.vy + b.vz * b.vz);
|
||||
for (usize j = i + 1; j < nbodies; j++)
|
||||
{
|
||||
Planet* b2 = &bodies[j];
|
||||
double dx = b.x - b2.x;
|
||||
double dy = b.y - b2.y;
|
||||
double dz = b.z - b2.z;
|
||||
double distance = sqrt(dx * dx + dy * dy + dz * dz);
|
||||
e -= (b.mass * b2.mass) / distance;
|
||||
}
|
||||
}
|
||||
return e;
|
||||
}
|
||||
|
||||
fn void offset_momentum(Planet[] bodies)
|
||||
{
|
||||
double px;
|
||||
double py;
|
||||
double pz;
|
||||
foreach (&b : bodies)
|
||||
{
|
||||
px += b.vx * b.mass;
|
||||
py += b.vy * b.mass;
|
||||
pz += b.vz * b.mass;
|
||||
}
|
||||
bodies[0].vx = - px / SOLAR_MASS;
|
||||
bodies[0].vy = - py / SOLAR_MASS;
|
||||
bodies[0].vz = - pz / SOLAR_MASS;
|
||||
double px;
|
||||
double py;
|
||||
double pz;
|
||||
foreach (&b : bodies)
|
||||
{
|
||||
px += b.vx * b.mass;
|
||||
py += b.vy * b.mass;
|
||||
pz += b.vz * b.mass;
|
||||
}
|
||||
bodies[0].vx = - px / SOLAR_MASS;
|
||||
bodies[0].vy = - py / SOLAR_MASS;
|
||||
bodies[0].vz = - pz / SOLAR_MASS;
|
||||
}
|
||||
|
||||
Planet[*] planet_bodies = {
|
||||
{ /* sun */
|
||||
0, 0, 0, 0, 0, 0, SOLAR_MASS
|
||||
},
|
||||
{ /* jupiter */
|
||||
4.84143144246472090e+00,
|
||||
-1.16032004402742839e+00,
|
||||
-1.03622044471123109e-01,
|
||||
1.66007664274403694e-03 * DAYS_PER_YEAR,
|
||||
7.69901118419740425e-03 * DAYS_PER_YEAR,
|
||||
-6.90460016972063023e-05 * DAYS_PER_YEAR,
|
||||
9.54791938424326609e-04 * SOLAR_MASS
|
||||
},
|
||||
{ /* saturn */
|
||||
8.34336671824457987e+00,
|
||||
4.12479856412430479e+00,
|
||||
-4.03523417114321381e-01,
|
||||
-2.76742510726862411e-03 * DAYS_PER_YEAR,
|
||||
4.99852801234917238e-03 * DAYS_PER_YEAR,
|
||||
2.30417297573763929e-05 * DAYS_PER_YEAR,
|
||||
2.85885980666130812e-04 * SOLAR_MASS
|
||||
},
|
||||
{ /* uranus */
|
||||
1.28943695621391310e+01,
|
||||
-1.51111514016986312e+01,
|
||||
-2.23307578892655734e-01,
|
||||
2.96460137564761618e-03 * DAYS_PER_YEAR,
|
||||
2.37847173959480950e-03 * DAYS_PER_YEAR,
|
||||
-2.96589568540237556e-05 * DAYS_PER_YEAR,
|
||||
4.36624404335156298e-05 * SOLAR_MASS
|
||||
},
|
||||
{ /* neptune */
|
||||
1.53796971148509165e+01,
|
||||
-2.59193146099879641e+01,
|
||||
1.79258772950371181e-01,
|
||||
2.68067772490389322e-03 * DAYS_PER_YEAR,
|
||||
1.62824170038242295e-03 * DAYS_PER_YEAR,
|
||||
-9.51592254519715870e-05 * DAYS_PER_YEAR,
|
||||
5.15138902046611451e-05 * SOLAR_MASS
|
||||
{ /* sun */
|
||||
0, 0, 0, 0, 0, 0, SOLAR_MASS
|
||||
},
|
||||
{ /* jupiter */
|
||||
4.84143144246472090e+00,
|
||||
-1.16032004402742839e+00,
|
||||
-1.03622044471123109e-01,
|
||||
1.66007664274403694e-03 * DAYS_PER_YEAR,
|
||||
7.69901118419740425e-03 * DAYS_PER_YEAR,
|
||||
-6.90460016972063023e-05 * DAYS_PER_YEAR,
|
||||
9.54791938424326609e-04 * SOLAR_MASS
|
||||
},
|
||||
{ /* saturn */
|
||||
8.34336671824457987e+00,
|
||||
4.12479856412430479e+00,
|
||||
-4.03523417114321381e-01,
|
||||
-2.76742510726862411e-03 * DAYS_PER_YEAR,
|
||||
4.99852801234917238e-03 * DAYS_PER_YEAR,
|
||||
2.30417297573763929e-05 * DAYS_PER_YEAR,
|
||||
2.85885980666130812e-04 * SOLAR_MASS
|
||||
},
|
||||
{ /* uranus */
|
||||
1.28943695621391310e+01,
|
||||
-1.51111514016986312e+01,
|
||||
-2.23307578892655734e-01,
|
||||
2.96460137564761618e-03 * DAYS_PER_YEAR,
|
||||
2.37847173959480950e-03 * DAYS_PER_YEAR,
|
||||
-2.96589568540237556e-05 * DAYS_PER_YEAR,
|
||||
4.36624404335156298e-05 * SOLAR_MASS
|
||||
},
|
||||
{ /* neptune */
|
||||
1.53796971148509165e+01,
|
||||
-2.59193146099879641e+01,
|
||||
1.79258772950371181e-01,
|
||||
2.68067772490389322e-03 * DAYS_PER_YEAR,
|
||||
1.62824170038242295e-03 * DAYS_PER_YEAR,
|
||||
-9.51592254519715870e-05 * DAYS_PER_YEAR,
|
||||
5.15138902046611451e-05 * SOLAR_MASS
|
||||
}
|
||||
};
|
||||
|
||||
@@ -130,13 +130,13 @@ Planet[*] planet_bodies = {
|
||||
*/
|
||||
fn void scale_bodies(Planet[] bodies, double scale)
|
||||
{
|
||||
foreach (&b : bodies)
|
||||
{
|
||||
b.mass *= scale * scale;
|
||||
b.vx *= scale;
|
||||
b.vy *= scale;
|
||||
b.vz *= scale;
|
||||
}
|
||||
foreach (&b : bodies)
|
||||
{
|
||||
b.mass *= scale * scale;
|
||||
b.vx *= scale;
|
||||
b.vy *= scale;
|
||||
b.vz *= scale;
|
||||
}
|
||||
}
|
||||
|
||||
extern fn int atoi(char *s);
|
||||
@@ -145,17 +145,17 @@ extern fn double sqrt(double);
|
||||
|
||||
fn int main(int argc, char ** argv)
|
||||
{
|
||||
int n = atoi(argv[1]);
|
||||
int n = atoi(argv[1]);
|
||||
|
||||
Planet[] bodies = &planet_bodies;
|
||||
offset_momentum(bodies);
|
||||
printf ("%.9f\n", energy(bodies));
|
||||
scale_bodies(bodies, DT);
|
||||
for (int i = 1; i <= n; i++)
|
||||
{
|
||||
advance(bodies);
|
||||
}
|
||||
scale_bodies(bodies, RECIP_DT);
|
||||
printf ("%.9f\n", energy(bodies));
|
||||
return 0;
|
||||
Planet[] bodies = &planet_bodies;
|
||||
offset_momentum(bodies);
|
||||
printf ("%.9f\n", energy(bodies));
|
||||
scale_bodies(bodies, DT);
|
||||
for (int i = 1; i <= n; i++)
|
||||
{
|
||||
advance(bodies);
|
||||
}
|
||||
scale_bodies(bodies, RECIP_DT);
|
||||
printf ("%.9f\n", energy(bodies));
|
||||
return 0;
|
||||
}
|
||||
|
||||
@@ -18,10 +18,10 @@ fn void eval_A_times_u(double[] u, double[] au)
|
||||
foreach (i, &val : au)
|
||||
{
|
||||
*val = 0;
|
||||
foreach (j, uval : u)
|
||||
foreach (j, uval : u)
|
||||
{
|
||||
*val += eval_A((int)(i), (int)(j)) * uval;
|
||||
}
|
||||
*val += eval_A((int)(i), (int)(j)) * uval;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@@ -30,10 +30,10 @@ fn void eval_At_times_u(double[] u, double[] au)
|
||||
foreach (i, &val : au)
|
||||
{
|
||||
*val = 0;
|
||||
foreach (j, uval : u)
|
||||
foreach (j, uval : u)
|
||||
{
|
||||
*val += eval_A((int)(j), (int)(i)) * uval;
|
||||
}
|
||||
*val += eval_A((int)(j), (int)(i)) * uval;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@@ -47,21 +47,21 @@ fn int main(int argc, char **argv)
|
||||
{
|
||||
int n = (argc == 2) ? atoi(argv[1]) : 2000;
|
||||
temparr = @array::make(double, n);
|
||||
double[] u = @array::make(double, n);
|
||||
double[] v = @array::make(double, n);
|
||||
foreach(&uval : u) *uval = 1;
|
||||
double[] u = @array::make(double, n);
|
||||
double[] v = @array::make(double, n);
|
||||
foreach(&uval : u) *uval = 1;
|
||||
for (int i = 0; i < 10; i++)
|
||||
{
|
||||
eval_AtA_times_u(u, v);
|
||||
eval_AtA_times_u(v, u);
|
||||
}
|
||||
double vBv;
|
||||
double vv;
|
||||
foreach (i, vval : v)
|
||||
{
|
||||
double vBv;
|
||||
double vv;
|
||||
foreach (i, vval : v)
|
||||
{
|
||||
vBv += u[i] * vval;
|
||||
vv += vval * vval;
|
||||
}
|
||||
}
|
||||
printf("%0.9f\n", sqrt(vBv / vv));
|
||||
return 0;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user