133 lines
4.2 KiB
Swift
133 lines
4.2 KiB
Swift
//
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// SQLite.swift
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// https://github.com/stephencelis/SQLite.swift
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// Copyright © 2014-2015 Stephen Celis.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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#if SQLITE_SWIFT_STANDALONE
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import sqlite3
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#elseif SQLITE_SWIFT_SQLCIPHER
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import SQLCipher
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#elseif os(Linux)
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import CSQLite
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#else
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import SQLite3
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#endif
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public typealias Star = (Expression<Binding>?, Expression<Binding>?) -> Expression<Void>
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public func *(_: Expression<Binding>?, _: Expression<Binding>?) -> Expression<Void> {
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return Expression(literal: "*")
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}
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public protocol _OptionalType {
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associatedtype WrappedType
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}
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extension Optional : _OptionalType {
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public typealias WrappedType = Wrapped
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}
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// let SQLITE_STATIC = unsafeBitCast(0, sqlite3_destructor_type.self)
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let SQLITE_TRANSIENT = unsafeBitCast(-1, to: sqlite3_destructor_type.self)
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extension String {
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func quote(_ mark: Character = "\"") -> String {
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let escaped = characters.reduce("") { string, character in
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string + (character == mark ? "\(mark)\(mark)" : "\(character)")
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}
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return "\(mark)\(escaped)\(mark)"
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}
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func join(_ expressions: [Expressible]) -> Expressible {
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var (template, bindings) = ([String](), [Binding?]())
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for expressible in expressions {
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let expression = expressible.expression
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template.append(expression.template)
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bindings.append(contentsOf: expression.bindings)
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}
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return Expression<Void>(template.joined(separator: self), bindings)
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}
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func infix<T>(_ lhs: Expressible, _ rhs: Expressible, wrap: Bool = true) -> Expression<T> {
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let expression = Expression<T>(" \(self) ".join([lhs, rhs]).expression)
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guard wrap else {
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return expression
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}
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return "".wrap(expression)
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}
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func prefix(_ expressions: Expressible) -> Expressible {
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return "\(self) ".wrap(expressions) as Expression<Void>
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}
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func prefix(_ expressions: [Expressible]) -> Expressible {
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return "\(self) ".wrap(expressions) as Expression<Void>
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}
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func wrap<T>(_ expression: Expressible) -> Expression<T> {
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return Expression("\(self)(\(expression.expression.template))", expression.expression.bindings)
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}
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func wrap<T>(_ expressions: [Expressible]) -> Expression<T> {
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return wrap(", ".join(expressions))
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}
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}
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func infix<T>(_ lhs: Expressible, _ rhs: Expressible, wrap: Bool = true, function: String = #function) -> Expression<T> {
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return function.infix(lhs, rhs, wrap: wrap)
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}
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func wrap<T>(_ expression: Expressible, function: String = #function) -> Expression<T> {
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return function.wrap(expression)
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}
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func wrap<T>(_ expressions: [Expressible], function: String = #function) -> Expression<T> {
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return function.wrap(", ".join(expressions))
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}
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func transcode(_ literal: Binding?) -> String {
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guard let literal = literal else { return "NULL" }
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switch literal {
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case let blob as Blob:
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return blob.description
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case let string as String:
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return string.quote("'")
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case let binding:
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return "\(binding)"
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}
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}
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func value<A: Value>(_ v: Binding) -> A {
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return A.fromDatatypeValue(v as! A.Datatype) as! A
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}
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func value<A: Value>(_ v: Binding?) -> A {
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return value(v!)
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}
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