remove ceph code

[stor4nfv.git] / src / ceph / src / compressor / lz4 / LZ4Compressor.h

diff --git a/src/ceph/src/compressor/lz4/LZ4Compressor.h b/src/ceph/src/compressor/lz4/LZ4Compressor.h
deleted file mode 100644 (file)
index 55e816b..0000000
--- a/src/ceph/src/compressor/lz4/LZ4Compressor.h
+++ /dev/null
@@ -1,114 +0,0 @@
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2017 Haomai Wang <haomaiwang@gmail.com>
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software 
- * Foundation.  See file COPYING.
- *
- */
-
-#ifndef CEPH_LZ4COMPRESSOR_H
-#define CEPH_LZ4COMPRESSOR_H
-
-#include <lz4.h>
-
-#include "compressor/Compressor.h"
-#include "include/buffer.h"
-#include "include/encoding.h"
-#include "common/Tub.h"
-
-
-class LZ4Compressor : public Compressor {
- public:
-  LZ4Compressor() : Compressor(COMP_ALG_LZ4, "lz4") {}
-
-  int compress(const bufferlist &src, bufferlist &dst) override {
-    bufferptr outptr = buffer::create_page_aligned(
-      LZ4_compressBound(src.length()));
-    LZ4_stream_t lz4_stream;
-    LZ4_resetStream(&lz4_stream);
-
-    auto p = src.begin();
-    size_t left = src.length();
-    int pos = 0;
-    const char *data;
-    unsigned num = src.get_num_buffers();
-    uint32_t origin_len;
-    uint32_t compressed_len;
-    ::encode((uint32_t)num, dst);
-    while (left) {
-      origin_len = p.get_ptr_and_advance(left, &data);
-      compressed_len = LZ4_compress_fast_continue(
-        &lz4_stream, data, outptr.c_str()+pos, origin_len,
-        outptr.length()-pos, 1);
-      if (compressed_len <= 0)
-        return -1;
-      pos += compressed_len;
-      left -= origin_len;
-      ::encode(origin_len, dst);
-      ::encode(compressed_len, dst);
-    }
-    assert(p.end());
-
-    dst.append(outptr, 0, pos);
-    return 0;
-  }
-
-  int decompress(const bufferlist &src, bufferlist &dst) override {
-    bufferlist::iterator i = const_cast<bufferlist&>(src).begin();
-    return decompress(i, src.length(), dst);
-  }
-
-  int decompress(bufferlist::iterator &p,
-                size_t compressed_len,
-                bufferlist &dst) override {
-    uint32_t count;
-    std::vector<std::pair<uint32_t, uint32_t> > compressed_pairs;
-    ::decode(count, p);
-    compressed_pairs.resize(count);
-    uint32_t total_origin = 0;
-    for (unsigned i = 0; i < count; ++i) {
-      ::decode(compressed_pairs[i].first, p);
-      ::decode(compressed_pairs[i].second, p);
-      total_origin += compressed_pairs[i].first;
-    }
-    compressed_len -= (sizeof(uint32_t) + sizeof(uint32_t) * count * 2);
-
-    bufferptr dstptr(total_origin);
-    LZ4_streamDecode_t lz4_stream_decode;
-    LZ4_setStreamDecode(&lz4_stream_decode, nullptr, 0);
-
-    bufferptr cur_ptr = p.get_current_ptr();
-    bufferptr *ptr = &cur_ptr;
-    Tub<bufferptr> data_holder;
-    if (compressed_len != cur_ptr.length()) {
-      data_holder.construct(compressed_len);
-      p.copy_deep(compressed_len, *data_holder);
-      ptr = data_holder.get();
-    }
-
-    char *c_in = ptr->c_str();
-    char *c_out = dstptr.c_str();
-    for (unsigned i = 0; i < count; ++i) {
-      int r = LZ4_decompress_safe_continue(
-          &lz4_stream_decode, c_in, c_out, compressed_pairs[i].second, compressed_pairs[i].first);
-      if (r == (int)compressed_pairs[i].first) {
-        c_in += compressed_pairs[i].second;
-        c_out += compressed_pairs[i].first;
-      } else if (r < 0) {
-        return -1;
-      } else if (r != (int)compressed_pairs[i].first) {
-        return -2;
-      }
-    }
-    dst.push_back(std::move(dstptr));
-    return 0;
-  }
-};
-
-#endif