Move c_src dirs back to toplevel

[bcachefs-tools-debian] / c_src / raid / combo.h

diff --git a/c_src/raid/combo.h b/c_src/raid/combo.h
deleted file mode 100644 (file)
index 8efc31a..0000000
--- a/c_src/raid/combo.h
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * Copyright (C) 2013 Andrea Mazzoleni
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#ifndef __RAID_COMBO_H
-#define __RAID_COMBO_H
-
-#include <assert.h>
-
-/**
- * Get the first permutation with repetition of r of n elements.
- *
- * Typical use is with permutation_next() in the form :
- *
- * int i[R];
- * permutation_first(R, N, i);
- * do {
- *    code using i[0], i[1], ..., i[R-1]
- * } while (permutation_next(R, N, i));
- *
- * It's equivalent at the code :
- *
- * for(i[0]=0;i[0]<N;++i[0])
- *     for(i[1]=0;i[1]<N;++i[1])
- *        ...
- *            for(i[R-2]=0;i[R-2]<N;++i[R-2])
- *                for(i[R-1]=0;i[R-1]<N;++i[R-1])
- *                    code using i[0], i[1], ..., i[R-1]
- */
-static __always_inline void permutation_first(int r, int n, int *c)
-{
-       int i;
-
-       (void)n; /* unused, but kept for clarity */
-       assert(0 < r && r <= n);
-
-       for (i = 0; i < r; ++i)
-               c[i] = 0;
-}
-
-/**
- * Get the next permutation with repetition of r of n elements.
- * Return ==0 when finished.
- */
-static __always_inline int permutation_next(int r, int n, int *c)
-{
-       int i = r - 1; /* present position */
-
-recurse:
-       /* next element at position i */
-       ++c[i];
-
-       /* if the position has reached the max */
-       if (c[i] >= n) {
-
-               /* if we are at the first level, we have finished */
-               if (i == 0)
-                       return 0;
-
-               /* increase the previous position */
-               --i;
-               goto recurse;
-       }
-
-       ++i;
-
-       /* initialize all the next positions, if any */
-       while (i < r) {
-               c[i] = 0;
-               ++i;
-       }
-
-       return 1;
-}
-
-/**
- * Get the first combination without repetition of r of n elements.
- *
- * Typical use is with combination_next() in the form :
- *
- * int i[R];
- * combination_first(R, N, i);
- * do {
- *    code using i[0], i[1], ..., i[R-1]
- * } while (combination_next(R, N, i));
- *
- * It's equivalent at the code :
- *
- * for(i[0]=0;i[0]<N-(R-1);++i[0])
- *     for(i[1]=i[0]+1;i[1]<N-(R-2);++i[1])
- *        ...
- *            for(i[R-2]=i[R-3]+1;i[R-2]<N-1;++i[R-2])
- *                for(i[R-1]=i[R-2]+1;i[R-1]<N;++i[R-1])
- *                    code using i[0], i[1], ..., i[R-1]
- */
-static __always_inline void combination_first(int r, int n, int *c)
-{
-       int i;
-
-       (void)n; /* unused, but kept for clarity */
-       assert(0 < r && r <= n);
-
-       for (i = 0; i < r; ++i)
-               c[i] = i;
-}
-
-/**
- * Get the next combination without repetition of r of n elements.
- * Return ==0 when finished.
- */
-static __always_inline int combination_next(int r, int n, int *c)
-{
-       int i = r - 1; /* present position */
-       int h = n; /* high limit for this position */
-
-recurse:
-       /* next element at position i */
-       ++c[i];
-
-       /* if the position has reached the max */
-       if (c[i] >= h) {
-
-               /* if we are at the first level, we have finished */
-               if (i == 0)
-                       return 0;
-
-               /* increase the previous position */
-               --i;
-               --h;
-               goto recurse;
-       }
-
-       ++i;
-
-       /* initialize all the next positions, if any */
-       while (i < r) {
-               /* each position start at the next value of the previous one */
-               c[i] = c[i - 1] + 1;
-               ++i;
-       }
-
-       return 1;
-}
-#endif
-