Move bundled copy of sqlite one level deeper to better separate it...

third_party/sqlite/src/os_symbian.cc

Index: third_party/sqlite/src/os_symbian.cc
===================================================================
--- third_party/sqlite/src/os_symbian.cc	(revision 56608)
+++ third_party/sqlite/src/os_symbian.cc	(working copy)
@@ -1,579 +0,0 @@
-// Copyright 2008, Google Inc.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-//
-//  1. Redistributions of source code must retain the above copyright notice,
-//     this list of conditions and the following disclaimer.
-//  2. Redistributions in binary form must reproduce the above copyright notice,
-//     this list of conditions and the following disclaimer in the documentation
-//     and/or other materials provided with the distribution.
-//  3. Neither the name of Google Inc. nor the names of its contributors may be
-//     used to endorse or promote products derived from this software without
-//     specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
-// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
-// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file contains code that is specific to Symbian.
-// Differently from the rest of SQLite, it is implemented in C++ as this is
-// the native language of the OS and all interfaces we need to use are C++.
-//
-// This file follows the Gears code style guidelines.
-
-#ifdef OS_SYMBIAN
-#include <coemain.h>
-#include <e32math.h>
-#include <f32file.h>
-#include <utf.h>
-
-extern "C" {
-#include "sqliteInt.h"
-#include "os_common.h"
-}
-
-const TInt kFileLockAttempts = 3;
-
-// The global file system session.
-RFs g_fs_session;
-
-static TInt UTF8ToUTF16(const char *in, TDes *out16) {
-  assert(in);
-  TPtrC8 in_des(reinterpret_cast<const unsigned char*>(in));
-  return CnvUtfConverter::ConvertToUnicodeFromUtf8(*out16, in_des);
-}
-
-static TInt UTF16ToUTF8(const TDesC16& in16, TDes8 *out8) {
-  return CnvUtfConverter::ConvertFromUnicodeToUtf8(*out8, in16);
-}
-
-// The SymbianFile structure is a subclass of sqlite3_file* specific to the
-// Symbian portability layer.
-struct SymbianFile {
-  const sqlite3_io_methods *methods;
-  RFile handle;              // The file handle
-  TUint8 lock_type;          // Type of lock currently held on this file
-  TUint16 shared_lock_byte;  // Randomly chosen byte used as a shared lock
-};
-
-static SymbianFile* ConvertToSymbianFile(sqlite3_file* const id) {
-  assert(id);
-  return reinterpret_cast<SymbianFile*>(id);
-}
-
-static int SymbianClose(sqlite3_file *id) {
-  SymbianFile *file_id = ConvertToSymbianFile(id);
-  file_id->handle.Close();
-  OpenCounter(-1);
-  return SQLITE_OK;
-}
-
-static int SymbianRead(sqlite3_file *id,
-                       void *buffer,
-                       int amount,
-                       sqlite3_int64 offset) {
-  assert(buffer);
-  assert(amount >=0);
-  assert(offset >=0);
-
-  SymbianFile* file_id = ConvertToSymbianFile(id);
-  TPtr8 dest(static_cast<unsigned char*>(buffer), amount);
-
-  if (KErrNone == file_id->handle.Read(offset, dest, amount)) {
-    if (dest.Length() == amount) {
-      return SQLITE_OK;
-    } else {
-      return SQLITE_IOERR_SHORT_READ;
-    }
-  } else {
-    return SQLITE_IOERR;
-  }
-}
-
-static int SymbianWrite(sqlite3_file *id,
-                        const void *buffer,
-                        int amount,
-                        sqlite3_int64 offset) {
-  assert(buffer);
-  assert(amount >=0);
-  assert(offset >=0);
-
-  SymbianFile *file_id = ConvertToSymbianFile(id);
-  TPtrC8 src(static_cast<const unsigned char*>(buffer), amount);
-  if (file_id->handle.Write(offset, src) != KErrNone) {
-    return SQLITE_IOERR_WRITE;
-  }
-
-  return SQLITE_OK;
-}
-
-static int SymbianTruncate(sqlite3_file *id, sqlite3_int64 bytes) {
-  assert(bytes >=0);
-
-  SymbianFile *file_id = ConvertToSymbianFile(id);
-  if (file_id->handle.SetSize(bytes) != KErrNone) {
-    return SQLITE_IOERR;
-  }
-  return SQLITE_OK;
-}
-
-static int SymbianSync(sqlite3_file *id, int /*flags*/) {
-  SymbianFile *file_id = ConvertToSymbianFile(id);
-  if (file_id->handle.Flush() != KErrNone) {
-    return SQLITE_IOERR;
-  } else {
-    return SQLITE_OK;
-  }
-}
-
-static int SymbianFileSize(sqlite3_file *id, sqlite3_int64 *size) {
-  assert(size);
-
-  SymbianFile *file_id = ConvertToSymbianFile(id);
-  TInt size_tmp;
-  if (file_id->handle.Size(size_tmp) != KErrNone) {
-    return SQLITE_IOERR;
-  }
-  *size = size_tmp;
-  return SQLITE_OK;
-}
-
-// File lock/unlock functions; see os_win.c for a description
-// of the algorithm used.
-static int GetReadLock(SymbianFile *file) {
-  file->shared_lock_byte = Math::Random() % (SHARED_SIZE - 1);
-  return file->handle.Lock(SHARED_FIRST + file->shared_lock_byte, 1);
-}
-
-static int UnlockReadLock(SymbianFile *file) {
-  return file->handle.UnLock(SHARED_FIRST + file->shared_lock_byte, 1);
-}
-
-static int SymbianLock(sqlite3_file *id, int lock_type) {
-  SymbianFile *file = ConvertToSymbianFile(id);
-  if (file->lock_type >= lock_type) {
-    return SQLITE_OK;
-  }
-
-  // Make sure the locking sequence is correct
-  assert(file->lock_type != NO_LOCK || lock_type == SHARED_LOCK);
-  assert(lock_type != PENDING_LOCK);
-  assert(lock_type != RESERVED_LOCK || file->lock_type == SHARED_LOCK);
-
-  // Lock the PENDING_LOCK byte if we need to acquire a PENDING lock or
-  // a SHARED lock.  If we are acquiring a SHARED lock, the acquisition of
-  // the PENDING_LOCK byte is temporary.
-  int new_lock_type = file->lock_type;
-  int got_pending_lock = 0;
-  int res = KErrNone;
-  if (file->lock_type == NO_LOCK ||
-         (lock_type == EXCLUSIVE_LOCK && file->lock_type == RESERVED_LOCK)) {
-    int count = kFileLockAttempts;
-    while (count-- > 0 &&
-        (res = file->handle.Lock(PENDING_BYTE, 1)) != KErrNone ) {
-      // Try 3 times to get the pending lock.  The pending lock might be
-      // held by another reader process who will release it momentarily.
-      OSTRACE2("could not get a PENDING lock. cnt=%d\n", cnt);
-      User::After(1000);
-    }
-    got_pending_lock = (res == KErrNone? 1 : 0);
-  }
-
-  // Acquire a shared lock
-  if (lock_type == SHARED_LOCK && res == KErrNone) {
-    assert(file->lock_type == NO_LOCK);
-    res = GetReadLock(file);
-    if (res == KErrNone) {
-      new_lock_type = SHARED_LOCK;
-    }
-  }
-
-  // Acquire a RESERVED lock
-  if (lock_type == RESERVED_LOCK && res == KErrNone) {
-    assert(file->lock_type == SHARED_LOCK);
-    res = file->handle.Lock(RESERVED_BYTE, 1);
-    if (res == KErrNone) {
-      new_lock_type = RESERVED_LOCK;
-    }
-  }
-
-  // Acquire a PENDING lock
-  if (lock_type == EXCLUSIVE_LOCK && res == KErrNone) {
-    new_lock_type = PENDING_LOCK;
-    got_pending_lock = 0;
-  }
-
-  // Acquire an EXCLUSIVE lock
-  if (lock_type == EXCLUSIVE_LOCK && res == KErrNone) {
-    assert(file->lock_type >= SHARED_LOCK);
-    res = UnlockReadLock(file);
-    OSTRACE2("unreadlock = %d\n", res);
-    res = file->handle.Lock(SHARED_FIRST, SHARED_SIZE);
-    if (res == KErrNone) {
-      new_lock_type = EXCLUSIVE_LOCK;
-    } else {
-      OSTRACE2("error-code = %d\n", GetLastError());
-      GetReadLock(file);
-    }
-  }
-
-  // If we are holding a PENDING lock that ought to be released, then
-  // release it now.
-  if (got_pending_lock && lock_type == SHARED_LOCK) {
-    file->handle.UnLock(PENDING_BYTE, 1);
-  }
-
-  // Update the state of the lock held in the file descriptor, then
-  // return the appropriate result code.
-  file->lock_type = new_lock_type;
-  if (res == KErrNone) {
-    return SQLITE_OK;
-  } else {
-    OSTRACE4("LOCK FAILED %d trying for %d but got %d\n", file->handle,
-           lock_type, new_lock_type);
-    return SQLITE_BUSY;
-  }
-}
-
-static int SymbianUnlock(sqlite3_file *id, int lock_type) {
-  int type;
-  int rc = SQLITE_OK;
-  SymbianFile *file = ConvertToSymbianFile(id);
-  assert(lock_type <= SHARED_LOCK);
-  OSTRACE5("UNLOCK %d to %d was %d(%d)\n", file->handle, lock_type,
-          file->lock_type, file->shared_lock_byte);
-  type = file->lock_type;
-  if (type >= EXCLUSIVE_LOCK) {
-    file->handle.UnLock(SHARED_FIRST, SHARED_SIZE);
-    if (lock_type == SHARED_LOCK && GetReadLock(file) != KErrNone) {
-      // This should never happen.  We should always be able to
-      // reacquire the read lock
-      rc = SQLITE_IOERR_UNLOCK;
-    }
-  }
-  if (type >= RESERVED_LOCK) {
-    file->handle.UnLock(RESERVED_BYTE, 1);
-  }
-  if (lock_type == NO_LOCK && type >= SHARED_LOCK) {
-    UnlockReadLock(file);
-  }
-  if (type >= PENDING_LOCK) {
-    file->handle.UnLock(PENDING_BYTE, 1);
-  }
-  file->lock_type = lock_type;
-  return rc;
-}
-
-static int SymbianCheckReservedLock(sqlite3_file *id, int *result) {
-  int rc;
-  SymbianFile *file = ConvertToSymbianFile(id);
-  if (file->lock_type >= RESERVED_LOCK) {
-    rc = 1;
-    OSTRACE3("TEST WR-LOCK %d %d (local)\n", pFile->h, rc);
-  } else {
-    rc = file->handle.Lock(RESERVED_BYTE, 1);
-    if (rc == KErrNone) {
-      file->handle.UnLock(RESERVED_BYTE, 1);
-    }
-    rc = !rc;
-    OSTRACE3("TEST WR-LOCK %d %d (remote)\n", file->handle, rc);
-  }
-  *result = rc;
-  return SQLITE_OK;
-}
-
-static int SymbianFileControl(sqlite3_file */*id*/,
-                              int /*op*/,
-                              void */*arg*/) {
-  return SQLITE_OK;
-}
-
-static int SymbianSectorSize(sqlite3_file */*id*/) {
-  return SQLITE_DEFAULT_SECTOR_SIZE;
-}
-
-static int SymbianDeviceCharacteristics(sqlite3_file */*id*/) {
-  return 0;
-}
-
-/*
-** This vector defines all the methods that can operate on a
-** sqlite3_file for Symbian.
-*/
-static const sqlite3_io_methods SymbianIoMethod = {
-  1,    // iVersion
-  SymbianClose,
-  SymbianRead,
-  SymbianWrite,
-  SymbianTruncate,
-  SymbianSync,
-  SymbianFileSize,
-  SymbianLock,
-  SymbianUnlock,
-  SymbianCheckReservedLock,
-  SymbianFileControl,
-  SymbianSectorSize,
-  SymbianDeviceCharacteristics
-};
-
-// ============================================================================
-// vfs methods begin here
-// ============================================================================
-static int SymbianOpen(sqlite3_vfs */*vfs*/,
-                       const char *name,
-                       sqlite3_file *id,
-                       int flags,
-                       int *out_flags) {
-  TUint desired_access;
-  TUint share_mode;
-  TInt err = KErrNone;
-  TFileName name_utf16;
-  SymbianFile *file = ConvertToSymbianFile(id);
-
-  if (out_flags) {
-    *out_flags = flags;
-  }
-
-  // if the name is NULL we have to open a temporary file.
-  if (!name) {
-    TPath private_path;
-    TFileName file_name;
-    if (g_fs_session.PrivatePath(private_path) != KErrNone) {
-      return SQLITE_CANTOPEN;
-    }
-    if (file->handle.Temp(g_fs_session,
-                          private_path,
-                          file_name,
-                          EFileWrite) !=
-        KErrNone) {
-      return SQLITE_CANTOPEN;
-    }
-    file->methods = &SymbianIoMethod;
-    file->lock_type = NO_LOCK;
-    file->shared_lock_byte = 0;
-    OpenCounter(+1);
-    return SQLITE_OK;
-  }
-
-  if (UTF8ToUTF16(name, &name_utf16) != KErrNone)
-    return SQLITE_CANTOPEN;
-
-  if (flags & SQLITE_OPEN_READWRITE) {
-    desired_access = EFileWrite;
-  } else {
-    desired_access = EFileRead;
-  }
-  if (flags & SQLITE_OPEN_MAIN_DB) {
-    share_mode = EFileShareReadersOrWriters;
-  } else {
-    share_mode = 0;
-  }
-
-  if (flags & SQLITE_OPEN_CREATE) {
-    err = file->handle.Create(g_fs_session,
-                              name_utf16,
-                              desired_access | share_mode);
-    if (err != KErrNone && err != KErrAlreadyExists) {
-      return SQLITE_CANTOPEN;
-    }
-  }
-
-  if (err != KErrNone) {
-    err = file->handle.Open(g_fs_session,
-                            name_utf16,
-                            desired_access | share_mode);
-    if (err != KErrNone && flags & SQLITE_OPEN_READWRITE) {
-      if (out_flags) {
-        *out_flags = (flags | SQLITE_OPEN_READONLY) & ~SQLITE_OPEN_READWRITE;
-      }
-      desired_access = EFileRead;
-      err = file->handle.Open(g_fs_session,
-                              name_utf16,
-                              desired_access | share_mode);
-    }
-    if (err != KErrNone) {
-      return SQLITE_CANTOPEN;
-    }
-  }
-  file->methods = &SymbianIoMethod;
-  file->lock_type = NO_LOCK;
-  file->shared_lock_byte = 0;
-  OpenCounter(+1);
-  return SQLITE_OK;
-}
-
-static int SymbianDelete(sqlite3_vfs */*vfs*/,
-                         const char *file_name,
-                         int /*sync_dir*/) {
-  assert(file_name);
-  TFileName file_name_utf16;
-
-  if (UTF8ToUTF16(file_name, &file_name_utf16) != KErrNone) {
-    return SQLITE_ERROR;
-  }
-
-  TInt result = g_fs_session.Delete(file_name_utf16);
-  return (result == KErrNone || result == KErrPathNotFound)?
-         SQLITE_OK : SQLITE_IOERR_DELETE;
-}
-
-static int SymbianAccess(sqlite3_vfs */*vfs*/,
-                         const char *file_name,
-                         int flags,
-                         int *result) {
-  assert(file_name);
-  TEntry entry;
-  TFileName file_name_utf16;
-
-  if (UTF8ToUTF16(file_name, &file_name_utf16) != KErrNone) {
-    return SQLITE_ERROR;
-  }
-
-  if (g_fs_session.Entry(file_name_utf16, entry) != KErrNone) {
-    *result = 0;
-    return SQLITE_OK;
-  }
-
-  switch (flags) {
-    case SQLITE_ACCESS_READ:
-    case SQLITE_ACCESS_EXISTS:
-      *result = !entry.IsDir();
-      break;
-    case SQLITE_ACCESS_READWRITE:
-      *result = !entry.IsDir() && !entry.IsReadOnly();
-      break;
-    default:
-      return SQLITE_ERROR;
-  }
-
-  return SQLITE_OK;
-}
-
-static int SymbianFullPathname(sqlite3_vfs */*vfs*/,
-                               const char *relative,
-                               int full_len,
-                               char *full) {
-  assert(relative);
-  assert(full);
-
-  TParse parse;
-  TPath relative_utf16;
-  TPath base_path;
-  TPtr8 full_utf8(reinterpret_cast<unsigned char*>(full), full_len);
-
-  g_fs_session.PrivatePath(base_path);
-
-  if (UTF8ToUTF16(relative, &relative_utf16) != KErrNone) {
-    return SQLITE_ERROR;
-  }
-
-  if (parse.Set(relative_utf16, &base_path, NULL) != KErrNone) {
-    return SQLITE_ERROR;
-  }
-
-  TDesC full_utf16(parse.FullName());
-  if (UTF16ToUTF8(relative_utf16, &full_utf8) != KErrNone) {
-    return SQLITE_ERROR;
-  }
-
-  full_utf8.PtrZ();
-  return SQLITE_OK;
-}
-
-static int SymbianRandomness(sqlite3_vfs */*vfs*/, int buf_len, char *buffer) {
-  assert(buffer);
-  TInt64 seed = User::TickCount();
-  for (TInt i = 0; i < buf_len; i++) {
-    buffer[i] = Math::Rand(seed) % 255;
-  }
-  return SQLITE_OK;
-}
-
-static int SymbianSleep(sqlite3_vfs */*vfs*/, int microsec) {
-  User::After(microsec);
-  return SQLITE_OK;
-}
-
-int SymbianCurrentTime(sqlite3_vfs */*vfs*/, double *now) {
-  _LIT(kEpoch, "19700101:000000.000000");
-  assert(now);
-  TTime time;
-  TTime epoch_time(kEpoch);
-  TTimeIntervalSeconds interval;
-
-  time.HomeTime();
-  // calculate seconds elapsed since 1-1-1970
-  time.SecondsFrom(epoch_time, interval);
-
-  // Julian date @ 1-1-1970 = 2440587.5
-  // seconds per day = 86400.0
-  *now = interval.Int()/86400.0 + 2440587.5;
-  return SQLITE_OK;
-}
-
-static int SymbianGetLastError(sqlite3_vfs */*vfs*/,
-                               int /*buf_len*/,
-                               char */*buf*/) {
-  assert(buf[0] == '\0');
-  return 0;
-}
-
-// Interfaces for opening a shared library, finding entry points
-// within the shared library, and closing the shared library.
-// TODO(marcogelmi): implement.
-#define SymbianDlOpen  0
-#define SymbianDlError 0
-#define SymbianDlSym   0
-#define SymbianDlClose 0
-
-// Initialize and deinitialize the operating system interface.
-int sqlite3_os_init(void) {
-  static sqlite3_vfs symbian_vfs = {
-    1,                     // iVersion
-    sizeof(SymbianFile),   // szOsFile
-    KMaxPath,              // mxPathname
-    0,                     // pNext
-    "symbian",             // name
-    0,                     // pAppData
-
-    SymbianOpen,           // xOpen
-    SymbianDelete,         // xDelete
-    SymbianAccess,         // xAccess
-    SymbianFullPathname,   // xFullPathname
-    SymbianDlOpen,         // xDlOpen
-    SymbianDlError,        // xDlError
-    SymbianDlSym,          // xDlSym
-    SymbianDlClose,        // xDlClose
-    SymbianRandomness,     // xRandomness
-    SymbianSleep,          // xSleep
-    SymbianCurrentTime,    // xCurrentTime
-    SymbianGetLastError    // xGetLastError
-  };
-
-  if (g_fs_session.Connect() != KErrNone) {
-    return SQLITE_ERROR;
-  }
-
-  if (g_fs_session.ShareAuto() != KErrNone) {
-    g_fs_session.Close();
-    return SQLITE_ERROR;
-  }
-
-  sqlite3_vfs_register(&symbian_vfs, 1);
-  return SQLITE_OK;
-}
-
-int sqlite3_os_end(void) {
-  g_fs_session.Close();
-  return SQLITE_OK;
-}
-
-#endif /* OS_SYMBIAN*/