move Rust sources to top level, C sources into c_src

[bcachefs-tools-debian] / libbcachefs / varint.c

diff --git a/libbcachefs/varint.c b/libbcachefs/varint.c
deleted file mode 100644 (file)
index cb4f33e..0000000
--- a/libbcachefs/varint.c
+++ /dev/null
@@ -1,129 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/bitops.h>
-#include <linux/math.h>
-#include <linux/string.h>
-#include <asm/unaligned.h>
-
-#ifdef CONFIG_VALGRIND
-#include <valgrind/memcheck.h>
-#endif
-
-#include "varint.h"
-
-/**
- * bch2_varint_encode - encode a variable length integer
- * @out:       destination to encode to
- * @v:         unsigned integer to encode
- * Returns:    size in bytes of the encoded integer - at most 9 bytes
- */
-int bch2_varint_encode(u8 *out, u64 v)
-{
-       unsigned bits = fls64(v|1);
-       unsigned bytes = DIV_ROUND_UP(bits, 7);
-       __le64 v_le;
-
-       if (likely(bytes < 9)) {
-               v <<= bytes;
-               v |= ~(~0 << (bytes - 1));
-               v_le = cpu_to_le64(v);
-               memcpy(out, &v_le, bytes);
-       } else {
-               *out++ = 255;
-               bytes = 9;
-               put_unaligned_le64(v, out);
-       }
-
-       return bytes;
-}
-
-/**
- * bch2_varint_decode - encode a variable length integer
- * @in:                varint to decode
- * @end:       end of buffer to decode from
- * @out:       on success, decoded integer
- * Returns:    size in bytes of the decoded integer - or -1 on failure (would
- * have read past the end of the buffer)
- */
-int bch2_varint_decode(const u8 *in, const u8 *end, u64 *out)
-{
-       unsigned bytes = likely(in < end)
-               ? ffz(*in & 255) + 1
-               : 1;
-       u64 v;
-
-       if (unlikely(in + bytes > end))
-               return -1;
-
-       if (likely(bytes < 9)) {
-               __le64 v_le = 0;
-
-               memcpy(&v_le, in, bytes);
-               v = le64_to_cpu(v_le);
-               v >>= bytes;
-       } else {
-               v = get_unaligned_le64(++in);
-       }
-
-       *out = v;
-       return bytes;
-}
-
-/**
- * bch2_varint_encode_fast - fast version of bch2_varint_encode
- * @out:       destination to encode to
- * @v:         unsigned integer to encode
- * Returns:    size in bytes of the encoded integer - at most 9 bytes
- *
- * This version assumes it's always safe to write 8 bytes to @out, even if the
- * encoded integer would be smaller.
- */
-int bch2_varint_encode_fast(u8 *out, u64 v)
-{
-       unsigned bits = fls64(v|1);
-       unsigned bytes = DIV_ROUND_UP(bits, 7);
-
-       if (likely(bytes < 9)) {
-               v <<= bytes;
-               v |= ~(~0 << (bytes - 1));
-       } else {
-               *out++ = 255;
-               bytes = 9;
-       }
-
-       put_unaligned_le64(v, out);
-       return bytes;
-}
-
-/**
- * bch2_varint_decode_fast - fast version of bch2_varint_decode
- * @in:                varint to decode
- * @end:       end of buffer to decode from
- * @out:       on success, decoded integer
- * Returns:    size in bytes of the decoded integer - or -1 on failure (would
- * have read past the end of the buffer)
- *
- * This version assumes that it is safe to read at most 8 bytes past the end of
- * @end (we still return an error if the varint extends past @end).
- */
-int bch2_varint_decode_fast(const u8 *in, const u8 *end, u64 *out)
-{
-#ifdef CONFIG_VALGRIND
-       VALGRIND_MAKE_MEM_DEFINED(in, 8);
-#endif
-       u64 v = get_unaligned_le64(in);
-       unsigned bytes = ffz(*in) + 1;
-
-       if (unlikely(in + bytes > end))
-               return -1;
-
-       if (likely(bytes < 9)) {
-               v >>= bytes;
-               v &= ~(~0ULL << (7 * bytes));
-       } else {
-               v = get_unaligned_le64(++in);
-       }
-
-       *out = v;
-       return bytes;
-}