Sync with upstream @23860137.

Fix GCC -Wshadow warnings in LevelDB's public header files,
reported by Dustin.

Add in-memory Env implementation (helpers/memenv/*).
This enables users to create LevelDB databases in-memory.

Initialize ShardedLRUCache::last_id_ to zero.
This fixes a Valgrind warning.

(Also delete port/sha1_* which were removed upstream some time ago.)

3 files changed, 0 insertions, 362 deletions

diff --git a/port/sha1_portable.cc b/port/sha1_portable.cc
deleted file mode 100644
index 8fa7277..0000000
--- a/port/sha1_portable.cc
+++ /dev/null
@@ -1,298 +0,0 @@
-// Portions copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-//
-// This module provides a slow but portable implementation of
-// the SHA1 hash function.
-//
-// It is adapted from free code written by Paul E. Jones
-// <paulej@packetizer.com>.  See http://www.packetizer.com/security/sha1/
-//
-// The license for the original code is:
-/*
-  Copyright (C) 1998, 2009
-  Paul E. Jones <paulej@packetizer.com>
-
-  Freeware Public License (FPL)
-
-  This software is licensed as "freeware."  Permission to distribute
-  this software in source and binary forms, including incorporation
-  into other products, is hereby granted without a fee.  THIS SOFTWARE
-  IS PROVIDED 'AS IS' AND WITHOUT ANY EXPRESSED OR IMPLIED WARRANTIES,
-  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
-  AND FITNESS FOR A PARTICULAR PURPOSE.  THE AUTHOR SHALL NOT BE HELD
-  LIABLE FOR ANY DAMAGES RESULTING FROM THE USE OF THIS SOFTWARE, EITHER
-  DIRECTLY OR INDIRECTLY, INCLUDING, BUT NOT LIMITED TO, LOSS OF DATA
-  OR DATA BEING RENDERED INACCURATE.
-*/
-
-#include "port/sha1_portable.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-
-namespace leveldb {
-namespace port {
-
-/*
- *  Description:
- *      This class implements the Secure Hashing Standard as defined
- *      in FIPS PUB 180-1 published April 17, 1995.
- */
-
-/*
- *  This structure will hold context information for the hashing
- *  operation
- */
-typedef struct SHA1Context {
-  unsigned Message_Digest[5]; /* Message Digest (output)          */
-
-  unsigned Length_Low;        /* Message length in bits           */
-  unsigned Length_High;       /* Message length in bits           */
-
-  unsigned char Message_Block[64]; /* 512-bit message blocks      */
-  int Message_Block_Index;    /* Index into message block array   */
-
-  bool Computed;               /* Is the digest computed?          */
-  bool Corrupted;              /* Is the message digest corruped?  */
-} SHA1Context;
-
-/*
- *  Portability Issues:
- *      SHA-1 is defined in terms of 32-bit "words".  This code was
- *      written with the expectation that the processor has at least
- *      a 32-bit machine word size.  If the machine word size is larger,
- *      the code should still function properly.  One caveat to that
- *      is that the input functions taking characters and character
- *      arrays assume that only 8 bits of information are stored in each
- *      character.
- */
-
-/*
- *  Define the circular shift macro
- */
-#define SHA1CircularShift(bits,word) \
-                ((((word) << (bits)) & 0xFFFFFFFF) | \
-                ((word) >> (32-(bits))))
-
-/* Function prototypes */
-static void SHA1ProcessMessageBlock(SHA1Context *);
-static void SHA1PadMessage(SHA1Context *);
-
-// Initialize the SHA1Context in preparation for computing a new
-// message digest.
-static void SHA1Reset(SHA1Context* context) {
-  context->Length_Low             = 0;
-  context->Length_High            = 0;
-  context->Message_Block_Index    = 0;
-
-  context->Message_Digest[0]      = 0x67452301;
-  context->Message_Digest[1]      = 0xEFCDAB89;
-  context->Message_Digest[2]      = 0x98BADCFE;
-  context->Message_Digest[3]      = 0x10325476;
-  context->Message_Digest[4]      = 0xC3D2E1F0;
-
-  context->Computed   = false;
-  context->Corrupted  = false;
-}
-
-// This function will return the 160-bit message digest into the
-// Message_Digest array within the SHA1Context provided
-static bool SHA1Result(SHA1Context *context) {
-  if (context->Corrupted) {
-    return false;
-  }
-
-  if (!context->Computed) {
-    SHA1PadMessage(context);
-    context->Computed = true;
-  }
-  return true;
-}
-
-// This function accepts an array of bytes as the next portion of
-// the message.
-static void SHA1Input(SHA1Context         *context,
-                      const unsigned char *message_array,
-                      unsigned            length) {
-  if (!length) return;
-
-  if (context->Computed || context->Corrupted) {
-    context->Corrupted = true;
-    return;
-  }
-
-  while(length-- && !context->Corrupted) {
-    context->Message_Block[context->Message_Block_Index++] =
-        (*message_array & 0xFF);
-
-    context->Length_Low += 8;
-    /* Force it to 32 bits */
-    context->Length_Low &= 0xFFFFFFFF;
-    if (context->Length_Low == 0) {
-      context->Length_High++;
-      /* Force it to 32 bits */
-      context->Length_High &= 0xFFFFFFFF;
-      if (context->Length_High == 0)
-      {
-        /* Message is too long */
-        context->Corrupted = true;
-      }
-    }
-
-    if (context->Message_Block_Index == 64)
-    {
-      SHA1ProcessMessageBlock(context);
-    }
-
-    message_array++;
-  }
-}
-
-// This function will process the next 512 bits of the message stored
-// in the Message_Block array.
-static void SHA1ProcessMessageBlock(SHA1Context *context) {
-  const unsigned K[] =            // Constants defined in SHA-1
-      {
-        0x5A827999,
-        0x6ED9EBA1,
-        0x8F1BBCDC,
-        0xCA62C1D6
-      };
-  int         t;                  // Loop counter
-  unsigned    temp;               // Temporary word value
-  unsigned    W[80];            // Word sequence
-  unsigned    A, B, C, D, E;    // Word buffers
-
-  // Initialize the first 16 words in the array W
-  for(t = 0; t < 16; t++) {
-    W[t] = ((unsigned) context->Message_Block[t * 4]) << 24;
-    W[t] |= ((unsigned) context->Message_Block[t * 4 + 1]) << 16;
-    W[t] |= ((unsigned) context->Message_Block[t * 4 + 2]) << 8;
-    W[t] |= ((unsigned) context->Message_Block[t * 4 + 3]);
-  }
-
-  for(t = 16; t < 80; t++) {
-    W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
-  }
-
-  A = context->Message_Digest[0];
-  B = context->Message_Digest[1];
-  C = context->Message_Digest[2];
-  D = context->Message_Digest[3];
-  E = context->Message_Digest[4];
-
-  for(t = 0; t < 20; t++) {
-    temp =  SHA1CircularShift(5,A) +
-        ((B & C) | ((~B) & D)) + E + W[t] + K[0];
-    temp &= 0xFFFFFFFF;
-    E = D;
-    D = C;
-    C = SHA1CircularShift(30,B);
-    B = A;
-    A = temp;
-  }
-
-  for(t = 20; t < 40; t++) {
-    temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1];
-    temp &= 0xFFFFFFFF;
-    E = D;
-    D = C;
-    C = SHA1CircularShift(30,B);
-    B = A;
-    A = temp;
-  }
-
-  for(t = 40; t < 60; t++) {
-    temp = SHA1CircularShift(5,A) +
-        ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2];
-    temp &= 0xFFFFFFFF;
-    E = D;
-    D = C;
-    C = SHA1CircularShift(30,B);
-    B = A;
-    A = temp;
-  }
-
-  for(t = 60; t < 80; t++) {
-    temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3];
-    temp &= 0xFFFFFFFF;
-    E = D;
-    D = C;
-    C = SHA1CircularShift(30,B);
-    B = A;
-    A = temp;
-  }
-
-  context->Message_Digest[0] = (context->Message_Digest[0] + A) & 0xFFFFFFFF;
-  context->Message_Digest[1] = (context->Message_Digest[1] + B) & 0xFFFFFFFF;
-  context->Message_Digest[2] = (context->Message_Digest[2] + C) & 0xFFFFFFFF;
-  context->Message_Digest[3] = (context->Message_Digest[3] + D) & 0xFFFFFFFF;
-  context->Message_Digest[4] = (context->Message_Digest[4] + E) & 0xFFFFFFFF;
-
-  context->Message_Block_Index = 0;
-}
-
-// According to the standard, the message must be padded to an even
-// 512 bits.  The first padding bit must be a '1'.  The last 64 bits
-// represent the length of the original message.  All bits in between
-// should be 0.  This function will pad the message according to those
-// rules by filling the Message_Block array accordingly.  It will also
-// call SHA1ProcessMessageBlock() appropriately.  When it returns, it
-// can be assumed that the message digest has been computed.
-static void SHA1PadMessage(SHA1Context *context) {
-  // Check to see if the current message block is too small to hold
-  // the initial padding bits and length.  If so, we will pad the
-  // block, process it, and then continue padding into a second block.
-  if (context->Message_Block_Index > 55) {
-    context->Message_Block[context->Message_Block_Index++] = 0x80;
-    while(context->Message_Block_Index < 64) {
-      context->Message_Block[context->Message_Block_Index++] = 0;
-    }
-
-    SHA1ProcessMessageBlock(context);
-
-    while(context->Message_Block_Index < 56) {
-      context->Message_Block[context->Message_Block_Index++] = 0;
-    }
-  } else {
-    context->Message_Block[context->Message_Block_Index++] = 0x80;
-    while(context->Message_Block_Index < 56) {
-      context->Message_Block[context->Message_Block_Index++] = 0;
-    }
-  }
-
-  // Store the message length as the last 8 octets
-  context->Message_Block[56] = (context->Length_High >> 24) & 0xFF;
-  context->Message_Block[57] = (context->Length_High >> 16) & 0xFF;
-  context->Message_Block[58] = (context->Length_High >> 8) & 0xFF;
-  context->Message_Block[59] = (context->Length_High) & 0xFF;
-  context->Message_Block[60] = (context->Length_Low >> 24) & 0xFF;
-  context->Message_Block[61] = (context->Length_Low >> 16) & 0xFF;
-  context->Message_Block[62] = (context->Length_Low >> 8) & 0xFF;
-  context->Message_Block[63] = (context->Length_Low) & 0xFF;
-
-  SHA1ProcessMessageBlock(context);
-}
-
-
-void SHA1_Hash_Portable(const char* data, size_t len, char* hash_array) {
-  SHA1Context context;
-  SHA1Reset(&context);
-  SHA1Input(&context, reinterpret_cast<const unsigned char*>(data), len);
-  bool ok = SHA1Result(&context);
-  if (!ok) {
-    fprintf(stderr, "Unexpected error in SHA1_Hash_Portable code\n");
-    exit(1);
-  }
-  for (int i = 0; i < 5; i++) {
-    uint32_t value = context.Message_Digest[i];
-    hash_array[i*4 + 0] = (value >> 24) & 0xff;
-    hash_array[i*4 + 1] = (value >> 16) & 0xff;
-    hash_array[i*4 + 2] = (value >> 8) & 0xff;
-    hash_array[i*4 + 3] = value & 0xff;
-  }
-}
-
-}
-}
diff --git a/port/sha1_portable.h b/port/sha1_portable.h
deleted file mode 100644
index 31db305..0000000
--- a/port/sha1_portable.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-
-#ifndef STORAGE_LEVELDB_PORT_SHA1_PORTABLE_H_
-#define STORAGE_LEVELDB_PORT_SHA1_PORTABLE_H_
-
-#include <stddef.h>
-
-namespace leveldb {
-namespace port {
-
-// Compute the SHA1 hash value of "data[0..len-1]" and store it in
-// "hash_array[0..19]".  hash_array must have 20 bytes of space available.
-//
-// This function is portable but may not be as fast as a version
-// optimized for your platform.  It is provided as a default method
-// that can be used when porting leveldb to a new platform if no
-// better SHA1 hash implementation is available.
-void SHA1_Hash_Portable(const char* data, size_t len, char* hash_array);
-
-}
-}
-
-#endif  // STORAGE_LEVELDB_PORT_SHA1_PORTABLE_H_
diff --git a/port/sha1_test.cc b/port/sha1_test.cc
deleted file mode 100644
index b182e67..0000000
--- a/port/sha1_test.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-
-#include "port/port.h"
-#include "util/testharness.h"
-
-namespace leveldb {
-namespace port {
-
-class SHA1 { };
-
-static std::string TestSHA1(const char* data, size_t len) {
-  char hash_val[20];
-  SHA1_Hash(data, len, hash_val);
-  char buf[41];
-  for (int i = 0; i < 20; i++) {
-    snprintf(buf + i * 2, 41 - i * 2,
-             "%02x",
-             static_cast<unsigned int>(static_cast<unsigned char>(
-                 hash_val[i])));
-  }
-  return std::string(buf, 40);
-}
-
-TEST(SHA1, Simple) {
-  ASSERT_EQ("da39a3ee5e6b4b0d3255bfef95601890afd80709", TestSHA1("", 0));
-  ASSERT_EQ("aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d", TestSHA1("hello", 5));
-  std::string x(10000, 'x');
-  ASSERT_EQ("f8c5cde791c5056cf515881e701c8a9ecb439a75",
-            TestSHA1(x.data(), x.size()));
-}
-
-}
-}
-
-int main(int argc, char** argv) {
-  return leveldb::test::RunAllTests();
-}