//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

@_exported import SwiftWASILibc // Clang module

//  Constants defined by <math.h>
@available(swift, deprecated: 3.0, message: "Please use 'Double.pi' or '.pi' to get the value of correct type and avoid casting.")
public let M_PI = Double.pi

@available(swift, deprecated: 3.0, message: "Please use 'Double.pi / 2' or '.pi / 2' to get the value of correct type and avoid casting.")
public let M_PI_2 = Double.pi / 2

@available(swift, deprecated: 3.0, message: "Please use 'Double.pi / 4' or '.pi / 4' to get the value of correct type and avoid casting.")
public let M_PI_4 = Double.pi / 4

@available(swift, deprecated: 3.0, message: "Please use '2.squareRoot()'.")
public let M_SQRT2 = 2.squareRoot()

@available(swift, deprecated: 3.0, message: "Please use '0.5.squareRoot()'.")
public let M_SQRT1_2 = 0.5.squareRoot()

//  Constants defined by <float.h>
@available(swift, deprecated: 3.0, message: "Please use 'T.radix' to get the radix of a FloatingPoint type 'T'.")
public let FLT_RADIX = Double.radix

%for type, prefix in [('Float', 'FLT'), ('Double', 'DBL')]:
//  Where does the 1 come from? C counts the usually-implicit leading
//  significand bit, but Swift does not. Neither is really right or wrong.
@available(swift, deprecated: 3.0, message: "Please use '${type}.significandBitCount + 1'.")
public let ${prefix}_MANT_DIG = ${type}.significandBitCount + 1

//  Where does the 1 come from? C models floating-point numbers as having a
//  significand in [0.5, 1), but Swift (following IEEE 754) considers the
//  significand to be in [1, 2). This rationale applies to ${prefix}_MIN_EXP
//  as well.
@available(swift, deprecated: 3.0, message: "Please use '${type}.greatestFiniteMagnitude.exponent + 1'.")
public let ${prefix}_MAX_EXP = ${type}.greatestFiniteMagnitude.exponent + 1

@available(swift, deprecated: 3.0, message: "Please use '${type}.leastNormalMagnitude.exponent + 1'.")
public let ${prefix}_MIN_EXP = ${type}.leastNormalMagnitude.exponent + 1

@available(swift, deprecated: 3.0, message: "Please use '${type}.greatestFiniteMagnitude' or '.greatestFiniteMagnitude'.")
public let ${prefix}_MAX = ${type}.greatestFiniteMagnitude

@available(swift, deprecated: 3.0, message: "Please use '${type}.ulpOfOne' or '.ulpOfOne'.")
public let ${prefix}_EPSILON = ${type}.ulpOfOne

@available(swift, deprecated: 3.0, message: "Please use '${type}.leastNormalMagnitude' or '.leastNormalMagnitude'.")
public let ${prefix}_MIN = ${type}.leastNormalMagnitude

@available(swift, deprecated: 3.0, message: "Please use '${type}.leastNonzeroMagnitude' or '.leastNonzeroMagnitude'.")
public let ${prefix}_TRUE_MIN = ${type}.leastNonzeroMagnitude

%end

public let MAP_FAILED: UnsafeMutableRawPointer! = UnsafeMutableRawPointer(bitPattern: -1)

// NOTE: wasi-libc's error.h defines these macros as function-like macros, which ClangImporter can't import for now.
%{
posix_error_codes = [
  "E2BIG",
  "EACCES",
  "EADDRINUSE",
  "EADDRNOTAVAIL",
  "EAFNOSUPPORT",
  "EAGAIN",
  "EWOULDBLOCK",
  "EALREADY",
  "EBADF",
  "EBADMSG",
  "EBUSY",
  "ECANCELED",
  "ECHILD",
  "ECONNABORTED",
  "ECONNREFUSED",
  "ECONNRESET",
  "EDEADLK",
  "EDESTADDRREQ",
  "EDOM",
  "EDQUOT",
  "EEXIST",
  "EFAULT",
  "EFBIG",
  "EHOSTUNREACH",
  "EIDRM",
  "EILSEQ",
  "EINPROGRESS",
  "EINTR",
  "EINVAL",
  "EIO",
  "EISCONN",
  "EISDIR",
  "ELOOP",
  "EMFILE",
  "EMLINK",
  "EMSGSIZE",
  "EMULTIHOP",
  "ENAMETOOLONG",
  "ENETDOWN",
  "ENETRESET",
  "ENETUNREACH",
  "ENFILE",
  "ENOBUFS",
  "ENODEV",
  "ENOENT",
  "ENOEXEC",
  "ENOLCK",
  "ENOLINK",
  "ENOMEM",
  "ENOMSG",
  "ENOPROTOOPT",
  "ENOSPC",
  "ENOSYS",
  "ENOTCONN",
  "ENOTDIR",
  "ENOTEMPTY",
  "ENOTRECOVERABLE",
  "ENOTSOCK",
  "ENOTSUP",
  "EOPNOTSUPP",
  "ENOTTY",
  "ENXIO",
  "EOVERFLOW",
  "EOWNERDEAD",
  "EPERM",
  "EPIPE",
  "EPROTO",
  "EPROTONOSUPPORT",
  "EPROTOTYPE",
  "ERANGE",
  "EROFS",
  "ESPIPE",
  "ESRCH",
  "ESTALE",
  "ETIMEDOUT",
  "ETXTBSY",
  "EXDEV",
  "ENOTCAPABLE",
]
}%

%for ecode in posix_error_codes:

public let ${ecode} = POSIXErrorCode.${ecode}.rawValue

%end

// NOTE: wasi-libc's _seek.h defines these macros as function-like macros, which ClangImporter can't import for now.

public let SEEK_SET: Int32 = 0
public let SEEK_CUR: Int32 = 1
public let SEEK_END: Int32 = 2