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55 lines
1.4 KiB
55 lines
1.4 KiB
#include "common.h"
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#include "klotski.h"
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uint64_t compact_code(uint64_t code) {
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int block_num = 0;
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uint64_t ret = 0;
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uint32_t range = 0;
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for (int addr = 0; code; ++addr, code >>= 3) {
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switch (code & 0x7) {
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case B_space:
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range <<= 2;
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break;
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case B_1x2:
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(range <<= 2) |= 0x1;
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break;
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case B_2x1:
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(range <<= 2) |= 0x2;
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break;
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case B_1x1:
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(range <<= 2) |= 0x3;
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break;
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case B_2x2:
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ret |= uint64_t(addr) << 32;
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default:
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continue;
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}
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++block_num;
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}
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return ret | range << (16 - block_num) * 2;
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}
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uint64_t extract_code(uint64_t code) {
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uint64_t ret = C_2x2 << (code >> 32) * 3;
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auto range = uint32_t(code);
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binary_reverse(range);
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for (int addr = 0; range; range >>= 2) {
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while (0x7 & ret >> addr) {
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addr += 3;
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}
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switch (range & 0x3) {
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case 0x1:
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ret |= C_1x2 << addr;
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break;
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case 0x2:
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ret |= C_2x1 << addr;
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break;
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case 0x3:
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ret |= C_1x1 << addr;
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break;
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case 0x0:
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addr += 3;
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}
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}
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return ret;
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}
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