Move core/platform/sql into modules/webdatabase

Source/core/platform/sql/chromium/SQLiteFileSystemChromiumPosix.cpp

-/*
- * Copyright (C) 2009 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 COPYRIGHT
- * OWNER OR CONTRIBUTORS 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.
- */
-
-#include "config.h"
-#include "core/platform/sql/SQLiteFileSystem.h"
-
-#include <sqlite3.h>
-#include "public/platform/Platform.h"
-
-#include <fcntl.h>
-#include <string.h>
-#include <unistd.h>
-
-using namespace WebCore;
-
-// Defined in Chromium's codebase in third_party/sqlite/src/os_unix.c
-extern "C" {
-void chromium_sqlite3_initialize_unix_sqlite3_file(sqlite3_file* file);
-int chromium_sqlite3_fill_in_unix_sqlite3_file(sqlite3_vfs* vfs, int fd, int dirfd, sqlite3_file* file, const char* fileName, int noLock);
-int chromium_sqlite3_get_reusable_file_handle(sqlite3_file* file, const char* fileName, int flags, int* fd);
-void chromium_sqlite3_update_reusable_file_handle(sqlite3_file* file, int fd, int flags);
-void chromium_sqlite3_destroy_reusable_file_handle(sqlite3_file* file);
-}
-
-// Chromium's Posix implementation of SQLite VFS
-namespace {
-
-// Opens a file.
-//
-// vfs - pointer to the sqlite3_vfs object.
-// fileName - the name of the file.
-// id - the structure that will manipulate the newly opened file.
-// desiredFlags - the desired open mode flags.
-// usedFlags - the actual open mode flags that were used.
-int chromiumOpen(sqlite3_vfs* vfs, const char* fileName,
-                 sqlite3_file* id, int desiredFlags, int* usedFlags)
-{
-    chromium_sqlite3_initialize_unix_sqlite3_file(id);
-    int fd = -1;
-    int result = chromium_sqlite3_get_reusable_file_handle(id, fileName, desiredFlags, &fd);
-    if (result != SQLITE_OK)
-        return result;
-
-    if (fd < 0) {
-        fd = WebKit::Platform::current()->databaseOpenFile(String(fileName), desiredFlags);
-        if ((fd < 0) && (desiredFlags & SQLITE_OPEN_READWRITE)) {
-            int newFlags = (desiredFlags & ~(SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE)) | SQLITE_OPEN_READONLY;
-            fd = WebKit::Platform::current()->databaseOpenFile(String(fileName), newFlags);
-        }
-    }
-    if (fd < 0) {
-        chromium_sqlite3_destroy_reusable_file_handle(id);
-        return SQLITE_CANTOPEN;
-    }
-
-    if (usedFlags)
-        *usedFlags = desiredFlags;
-    chromium_sqlite3_update_reusable_file_handle(id, fd, desiredFlags);
-
-    fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
-
-    // The mask 0x00007F00 gives us the 7 bits that determine the type of the file SQLite is trying to open.
-    int fileType = desiredFlags & 0x00007F00;
-    int noLock = (fileType != SQLITE_OPEN_MAIN_DB);
-    result = chromium_sqlite3_fill_in_unix_sqlite3_file(vfs, fd, -1, id, fileName, noLock);
-    if (result != SQLITE_OK)
-        chromium_sqlite3_destroy_reusable_file_handle(id);
-    return result;
-}
-
-// Deletes the given file.
-//
-// vfs - pointer to the sqlite3_vfs object.
-// fileName - the name of the file.
-// syncDir - determines if the directory to which this file belongs
-//           should be synched after the file is deleted.
-int chromiumDelete(sqlite3_vfs*, const char* fileName, int syncDir)
-{
-    return WebKit::Platform::current()->databaseDeleteFile(String(fileName), syncDir);
-}
-
-// Check the existance and status of the given file.
-//
-// vfs - pointer to the sqlite3_vfs object.
-// fileName - the name of the file.
-// flag - the type of test to make on this file.
-// res - the result.
-int chromiumAccess(sqlite3_vfs*, const char* fileName, int flag, int* res)
-{
-    int attr = static_cast<int>(WebKit::Platform::current()->databaseGetFileAttributes(String(fileName)));
-    if (attr < 0) {
-        *res = 0;
-        return SQLITE_OK;
-    }
-
-    switch (flag) {
-    case SQLITE_ACCESS_EXISTS:
-        *res = 1;   // if the file doesn't exist, attr < 0
-        break;
-    case SQLITE_ACCESS_READWRITE:
-        *res = (attr & W_OK) && (attr & R_OK);
-        break;
-    case SQLITE_ACCESS_READ:
-        *res = (attr & R_OK);
-        break;
-    default:
-        return SQLITE_ERROR;
-    }
-
-    return SQLITE_OK;
-}
-
-// Turns a relative pathname into a full pathname.
-//
-// vfs - pointer to the sqlite3_vfs object.
-// relativePath - the relative path.
-// bufSize - the size of the output buffer in bytes.
-// absolutePath - the output buffer where the absolute path will be stored.
-int chromiumFullPathname(sqlite3_vfs* vfs, const char* relativePath,
-                         int, char* absolutePath)
-{
-    // The renderer process doesn't need to know the absolute path of the file
-    sqlite3_snprintf(vfs->mxPathname, absolutePath, "%s", relativePath);
-    return SQLITE_OK;
-}
-
-#ifndef SQLITE_OMIT_LOAD_EXTENSION
-// Returns NULL, thus disallowing loading libraries in the renderer process.
-//
-// vfs - pointer to the sqlite3_vfs object.
-// fileName - the name of the shared library file.
-void* chromiumDlOpen(sqlite3_vfs*, const char*)
-{
-    return 0;
-}
-#else
-#define chromiumDlOpen 0
-#endif // SQLITE_OMIT_LOAD_EXTENSION
-
-} // namespace
-
-namespace WebCore {
-
-void SQLiteFileSystem::registerSQLiteVFS()
-{
-    sqlite3_vfs* unix_vfs = sqlite3_vfs_find("unix");
-    static sqlite3_vfs chromium_vfs = {
-        1,
-        unix_vfs->szOsFile,
-        unix_vfs->mxPathname,
-        0,
-        "chromium_vfs",
-        unix_vfs->pAppData,
-        chromiumOpen,
-        chromiumDelete,
-        chromiumAccess,
-        chromiumFullPathname,
-        chromiumDlOpen,
-        unix_vfs->xDlError,
-        unix_vfs->xDlSym,
-        unix_vfs->xDlClose,
-        unix_vfs->xRandomness,
-        unix_vfs->xSleep,
-        unix_vfs->xCurrentTime,
-        unix_vfs->xGetLastError
-    };
-    sqlite3_vfs_register(&chromium_vfs, 0);
-}
-
-} // namespace WebCore