Move app/sql/* files to sql/ directory.

app/sql/statement.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef APP_SQL_STATEMENT_H_
-#define APP_SQL_STATEMENT_H_
-#pragma once
-
-#include <string>
-#include <vector>
-
-#include "app/sql/connection.h"
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/string16.h"
-
-namespace sql {
-
-// Possible return values from ColumnType in a statement. These should match
-// the values in sqlite3.h.
-enum ColType {
-  COLUMN_TYPE_INTEGER = 1,
-  COLUMN_TYPE_FLOAT = 2,
-  COLUMN_TYPE_TEXT = 3,
-  COLUMN_TYPE_BLOB = 4,
-  COLUMN_TYPE_NULL = 5,
-};
-
-// Normal usage:
-//   sql::Statement s(connection_.GetUniqueStatement(...));
-//   if (!s)  // You should check for errors before using the statement.
-//     return false;
-//
-//   s.BindInt(0, a);
-//   if (s.Step())
-//     return s.ColumnString(0);
-//
-// Step() and Run() just return true to signal success. If you want to handle
-// specific errors such as database corruption, install an error handler in
-// in the connection object using set_error_delegate().
-class Statement {
- public:
-  // Creates an uninitialized statement. The statement will be invalid until
-  // you initialize it via Assign.
-  Statement();
-
-  explicit Statement(scoped_refptr<Connection::StatementRef> ref);
-  ~Statement();
-
-  // Initializes this object with the given statement, which may or may not
-  // be valid. Use is_valid() to check if it's OK.
-  void Assign(scoped_refptr<Connection::StatementRef> ref);
-
-  // Returns true if the statement can be executed. All functions can still
-  // be used if the statement is invalid, but they will return failure or some
-  // default value. This is because the statement can become invalid in the
-  // middle of executing a command if there is a serioud error and the database
-  // has to be reset.
-  bool is_valid() const { return ref_->is_valid(); }
-
-  // These operators allow conveniently checking if the statement is valid
-  // or not. See the pattern above for an example.
-  operator bool() const { return is_valid(); }
-  bool operator!() const { return !is_valid(); }
-
-  // Running -------------------------------------------------------------------
-
-  // Executes the statement, returning true on success. This is like Step but
-  // for when there is no output, like an INSERT statement.
-  bool Run();
-
-  // Executes the statement, returning true if there is a row of data returned.
-  // You can keep calling Step() until it returns false to iterate through all
-  // the rows in your result set.
-  //
-  // When Step returns false, the result is either that there is no more data
-  // or there is an error. This makes it most convenient for loop usage. If you
-  // need to disambiguate these cases, use Succeeded().
-  //
-  // Typical example:
-  //   while (s.Step()) {
-  //     ...
-  //   }
-  //   return s.Succeeded();
-  bool Step();
-
-  // Resets the statement to its initial condition. This includes clearing all
-  // the bound variables and any current result row.
-  void Reset();
-
-  // Returns true if the last executed thing in this statement succeeded. If
-  // there was no last executed thing or the statement is invalid, this will
-  // return false.
-  bool Succeeded() const;
-
-  // Binding -------------------------------------------------------------------
-
-  // These all take a 0-based argument index and return true on failure. You
-  // may not always care about the return value (they'll DCHECK if they fail).
-  // The main thing you may want to check is when binding large blobs or
-  // strings there may be out of memory.
-  bool BindNull(int col);
-  bool BindBool(int col, bool val);
-  bool BindInt(int col, int val);
-  bool BindInt64(int col, int64 val);
-  bool BindDouble(int col, double val);
-  bool BindCString(int col, const char* val);
-  bool BindString(int col, const std::string& val);
-  bool BindString16(int col, const string16& value);
-  bool BindBlob(int col, const void* value, int value_len);
-
-  // Retrieving ----------------------------------------------------------------
-
-  // Returns the number of output columns in the result.
-  int ColumnCount() const;
-
-  // Returns the type associated with the given column.
-  //
-  // Watch out: the type may be undefined if you've done something to cause a
-  // "type conversion." This means requesting the value of a column of a type
-  // where that type is not the native type. For safety, call ColumnType only
-  // on a column before getting the value out in any way.
-  ColType ColumnType(int col) const;
-
-  // These all take a 0-based argument index.
-  bool ColumnBool(int col) const;
-  int ColumnInt(int col) const;
-  int64 ColumnInt64(int col) const;
-  double ColumnDouble(int col) const;
-  std::string ColumnString(int col) const;
-  string16 ColumnString16(int col) const;
-
-  // When reading a blob, you can get a raw pointer to the underlying data,
-  // along with the length, or you can just ask us to copy the blob into a
-  // vector. Danger! ColumnBlob may return NULL if there is no data!
-  int ColumnByteLength(int col) const;
-  const void* ColumnBlob(int col) const;
-  bool ColumnBlobAsString(int col, std::string* blob);
-  void ColumnBlobAsVector(int col, std::vector<char>* val) const;
-  void ColumnBlobAsVector(int col, std::vector<unsigned char>* val) const;
-
-  // Diagnostics --------------------------------------------------------------
-
-  // Returns the original text of sql statement. Do not keep a pointer to it.
-  const char* GetSQLStatement();
-
- private:
-  // This is intended to check for serious errors and report them to the
-  // connection object. It takes a sqlite error code, and returns the same
-  // code. Currently this function just updates the succeeded flag, but will be
-  // enhanced in the future to do the notification.
-  int CheckError(int err);
-
-  // The actual sqlite statement. This may be unique to us, or it may be cached
-  // by the connection, which is why it's refcounted. This pointer is
-  // guaranteed non-NULL.
-  scoped_refptr<Connection::StatementRef> ref_;
-
-  // See Succeeded() for what this holds.
-  bool succeeded_;
-
-  DISALLOW_COPY_AND_ASSIGN(Statement);
-};
-
-}  // namespace sql
-
-#endif  // APP_SQL_STATEMENT_H_