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27 lines
648 B
C
27 lines
648 B
C
#include "grid.h"
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//#include <string.h>
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#include <assert.h>
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#define LOG_MODULE "grid"
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#define LOG_ENABLE_DBG 0
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#include "log.h"
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void
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grid_swap_row(struct grid *grid, int row_a, int row_b)
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{
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assert(grid->offset >= 0);
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assert(row_a != row_b);
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assert(row_a >= 0);
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assert(row_b >= 0);
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int real_a = (grid->offset + row_a + grid->num_rows) % grid->num_rows;
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int real_b = (grid->offset + row_b + grid->num_rows) % grid->num_rows;
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struct row *tmp = grid->rows[real_a];
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grid->rows[real_a] = grid->rows[real_b];
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grid->rows[real_b] = tmp;
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grid->rows[real_a]->dirty = true;
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grid->rows[real_b]->dirty = true;
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}
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