746016f9ab
Change-Id: I1edc4bf2ff17c259ce654bba953c0e4705de35c2 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114950 Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com> Tested-by: Jenkins
687 lines
21 KiB
C++
687 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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/*
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* This file is part of LibreOffice published API.
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*/
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#ifndef INCLUDED_SAL_TYPES_H
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#define INCLUDED_SAL_TYPES_H
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#include "sal/config.h"
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#include <stddef.h>
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#include "sal/macros.h"
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#include "sal/typesizes.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef unsigned char sal_Bool;
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# define sal_False ((sal_Bool)0)
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# define sal_True ((sal_Bool)1)
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/* char is assumed to always be 1 byte long */
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typedef signed char sal_Int8;
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typedef unsigned char sal_uInt8;
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#if SAL_TYPES_SIZEOFSHORT == 2
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typedef signed short sal_Int16;
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typedef unsigned short sal_uInt16;
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#else
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#error "Could not find 16-bit type, add support for your architecture"
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#endif
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#if SAL_TYPES_SIZEOFLONG == 4
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typedef signed long sal_Int32;
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typedef unsigned long sal_uInt32;
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#define SAL_PRIdINT32 "ld"
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#define SAL_PRIuUINT32 "lu"
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#define SAL_PRIxUINT32 "lx"
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#define SAL_PRIXUINT32 "lX"
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#elif SAL_TYPES_SIZEOFINT == 4
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typedef signed int sal_Int32;
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typedef unsigned int sal_uInt32;
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#define SAL_PRIdINT32 "d"
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#define SAL_PRIuUINT32 "u"
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#define SAL_PRIxUINT32 "x"
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#define SAL_PRIXUINT32 "X"
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#else
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#error "Could not find 32-bit type, add support for your architecture"
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#endif
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#ifdef _MSC_VER
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typedef __int64 sal_Int64;
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typedef unsigned __int64 sal_uInt64;
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/* The following are macros that will add the 64 bit constant suffix. */
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#define SAL_CONST_INT64(x) x##i64
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#define SAL_CONST_UINT64(x) x##ui64
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#define SAL_PRIdINT64 "I64d"
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#define SAL_PRIuUINT64 "I64u"
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#define SAL_PRIxUINT64 "I64x"
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#define SAL_PRIXUINT64 "I64X"
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#elif defined (__GNUC__)
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#if SAL_TYPES_SIZEOFLONG == 8
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typedef signed long int sal_Int64;
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typedef unsigned long int sal_uInt64;
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/* The following are macros that will add the 64 bit constant suffix. */
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#define SAL_CONST_INT64(x) x##l
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#define SAL_CONST_UINT64(x) x##ul
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#define SAL_PRIdINT64 "ld"
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#define SAL_PRIuUINT64 "lu"
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#define SAL_PRIxUINT64 "lx"
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#define SAL_PRIXUINT64 "lX"
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#elif SAL_TYPES_SIZEOFLONGLONG == 8
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typedef signed long long sal_Int64;
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typedef unsigned long long sal_uInt64;
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/* The following are macros that will add the 64 bit constant suffix. */
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#define SAL_CONST_INT64(x) x##ll
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#define SAL_CONST_UINT64(x) x##ull
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#define SAL_PRIdINT64 "lld"
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#define SAL_PRIuUINT64 "llu"
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#define SAL_PRIxUINT64 "llx"
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#define SAL_PRIXUINT64 "llX"
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#else
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#error "Could not find 64-bit type, add support for your architecture"
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#endif
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#else
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#error "Please define the 64-bit types for your architecture/compiler in include/sal/types.h"
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#endif
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#if defined LIBO_INTERNAL_ONLY && defined __cplusplus
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#define SAL_UNICODE_NOTEQUAL_WCHAR_T
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typedef char16_t sal_Unicode;
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#elif defined(_WIN32)
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typedef wchar_t sal_Unicode;
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#else
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#define SAL_UNICODE_NOTEQUAL_WCHAR_T
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typedef sal_uInt16 sal_Unicode;
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#endif
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typedef void * sal_Handle;
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/* sal_Size should currently be the native width of the platform */
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#if SAL_TYPES_SIZEOFPOINTER == 4
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typedef sal_uInt32 sal_Size;
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typedef sal_Int32 sal_sSize;
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#elif SAL_TYPES_SIZEOFPOINTER == 8
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typedef sal_uInt64 sal_Size;
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typedef sal_Int64 sal_sSize;
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#else
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#error "Please make sure SAL_TYPES_SIZEOFPOINTER is defined for your architecture/compiler"
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#endif
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/* sal_PtrDiff holds the result of a pointer subtraction */
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#if SAL_TYPES_SIZEOFPOINTER == 4
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typedef sal_Int32 sal_PtrDiff;
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#elif SAL_TYPES_SIZEOFPOINTER == 8
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typedef sal_Int64 sal_PtrDiff;
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#else
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#error "Please make sure SAL_TYPES_SIZEOFPOINTER is defined for your architecture/compiler"
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#endif
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/* printf-style conversion specification length modifiers for size_t and
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ptrdiff_t (most platforms support C99, MSC has its own extension) */
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#if defined(_MSC_VER)
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#define SAL_PRI_SIZET "I"
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#define SAL_PRI_PTRDIFFT "I"
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#else
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#define SAL_PRI_SIZET "z"
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#define SAL_PRI_PTRDIFFT "t"
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#endif
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/* sal_IntPtr, sal_uIntPtr are integer types designed to hold pointers so that any valid
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* pointer to void can be converted to this type and back to a pointer to void and the
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* result will compare to the original pointer */
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#if SAL_TYPES_SIZEOFPOINTER == 4
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typedef sal_Int32 sal_IntPtr;
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typedef sal_uInt32 sal_uIntPtr;
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#define SAL_PRIdINTPTR SAL_PRIdINT32
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#define SAL_PRIuUINTPTR SAL_PRIuUINT32
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#define SAL_PRIxUINTPTR SAL_PRIxUINT32
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#define SAL_PRIXUINTPTR SAL_PRIXUINT32
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#elif SAL_TYPES_SIZEOFPOINTER == 8
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typedef sal_Int64 sal_IntPtr;
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typedef sal_uInt64 sal_uIntPtr;
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#define SAL_PRIdINTPTR SAL_PRIdINT64
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#define SAL_PRIuUINTPTR SAL_PRIuUINT64
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#define SAL_PRIxUINTPTR SAL_PRIxUINT64
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#define SAL_PRIXUINTPTR SAL_PRIXUINT64
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#else
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#error "Please make sure SAL_TYPES_SIZEOFPOINTER is defined for your architecture/compiler"
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#endif
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/* The following SAL_MIN_INTn defines codify the assumption that the signed
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* sal_Int types use two's complement representation. Defining them as
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* "-0x7F... - 1" instead of as "-0x80..." prevents warnings about applying the
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* unary minus operator to unsigned quantities.
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*/
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#define SAL_MIN_INT8 ((sal_Int8) (-0x7F - 1))
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#define SAL_MAX_INT8 ((sal_Int8) 0x7F)
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#define SAL_MAX_UINT8 ((sal_uInt8) 0xFF)
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#define SAL_MIN_INT16 ((sal_Int16) (-0x7FFF - 1))
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#define SAL_MAX_INT16 ((sal_Int16) 0x7FFF)
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#define SAL_MAX_UINT16 ((sal_uInt16) 0xFFFF)
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#define SAL_MIN_INT32 ((sal_Int32) (-0x7FFFFFFF - 1))
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#define SAL_MAX_INT32 ((sal_Int32) 0x7FFFFFFF)
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#define SAL_MAX_UINT32 ((sal_uInt32) 0xFFFFFFFF)
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#define SAL_MIN_INT64 ((sal_Int64) (SAL_CONST_INT64(-0x7FFFFFFFFFFFFFFF) - 1))
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#define SAL_MAX_INT64 ((sal_Int64) SAL_CONST_INT64(0x7FFFFFFFFFFFFFFF))
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#define SAL_MAX_UINT64 ((sal_uInt64) SAL_CONST_UINT64(0xFFFFFFFFFFFFFFFF))
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#if SAL_TYPES_SIZEOFPOINTER == 4
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#define SAL_MAX_SSIZE SAL_MAX_INT32
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#define SAL_MAX_SIZE SAL_MAX_UINT32
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#elif SAL_TYPES_SIZEOFPOINTER == 8
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#define SAL_MAX_SSIZE SAL_MAX_INT64
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#define SAL_MAX_SIZE SAL_MAX_UINT64
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#endif
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#define SAL_MAX_ENUM 0x7fffffff
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#if defined(_MSC_VER)
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# define SAL_DLLPUBLIC_EXPORT __declspec(dllexport)
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# define SAL_JNI_EXPORT __declspec(dllexport)
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# define SAL_DLLPUBLIC_IMPORT __declspec(dllimport)
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# define SAL_DLLPRIVATE
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# define SAL_DLLPUBLIC_TEMPLATE
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# define SAL_DLLPUBLIC_RTTI
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# define SAL_CALL __cdecl
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#elif defined SAL_UNX
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# if defined(__GNUC__)
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# if defined(DISABLE_DYNLOADING)
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# define SAL_DLLPUBLIC_EXPORT __attribute__ ((visibility("hidden")))
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# define SAL_JNI_EXPORT __attribute__ ((visibility("default")))
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# define SAL_DLLPUBLIC_IMPORT __attribute__ ((visibility("hidden")))
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# define SAL_DLLPRIVATE __attribute__ ((visibility("hidden")))
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# define SAL_DLLPUBLIC_TEMPLATE __attribute__ ((visibility("hidden")))
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# define SAL_DLLPUBLIC_RTTI
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# else
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# define SAL_DLLPUBLIC_EXPORT __attribute__ ((visibility("default")))
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# define SAL_JNI_EXPORT __attribute__ ((visibility("default")))
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# define SAL_DLLPUBLIC_IMPORT __attribute__ ((visibility("default")))
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# define SAL_DLLPRIVATE __attribute__ ((visibility("hidden")))
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# define SAL_DLLPUBLIC_TEMPLATE __attribute__ ((visibility("default")))
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# if defined __clang__
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# if __has_attribute(type_visibility)
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# define SAL_DLLPUBLIC_RTTI __attribute__ ((type_visibility("default")))
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# else
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# define SAL_DLLPUBLIC_RTTI __attribute__ ((visibility("default")))
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# endif
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# else
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# define SAL_DLLPUBLIC_RTTI
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# endif
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# endif
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# else
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# define SAL_DLLPUBLIC_EXPORT
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# define SAL_JNI_EXPORT
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# define SAL_DLLPUBLIC_IMPORT
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# define SAL_DLLPRIVATE
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# define SAL_DLLPUBLIC_TEMPLATE
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# define SAL_DLLPUBLIC_RTTI
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# endif
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# define SAL_CALL
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#else
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# error("unknown platform")
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#endif
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/**
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Exporting the symbols necessary for exception handling on GCC.
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These macros are used for inline declarations of exception classes, as in
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rtl/malformeduriexception.hxx.
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*/
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#if defined(__GNUC__)
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# if defined(DISABLE_DYNLOADING)
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# define SAL_EXCEPTION_DLLPUBLIC_EXPORT __attribute__((visibility("default")))
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# else
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# define SAL_EXCEPTION_DLLPUBLIC_EXPORT SAL_DLLPUBLIC_EXPORT
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# endif
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# define SAL_EXCEPTION_DLLPRIVATE SAL_DLLPRIVATE
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#else
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# define SAL_EXCEPTION_DLLPUBLIC_EXPORT
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# define SAL_EXCEPTION_DLLPRIVATE
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#endif
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/** Use this as markup for functions and methods whose return value must be
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checked.
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Compilers that support a construct of this nature will emit a compile
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time warning on unchecked return value.
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*/
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#if defined LIBO_INTERNAL_ONLY && defined __cplusplus
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#define SAL_WARN_UNUSED_RESULT [[nodiscard]]
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#elif (defined __GNUC__ \
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&& (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))) \
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|| defined __clang__
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# define SAL_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#else
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# define SAL_WARN_UNUSED_RESULT
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#endif
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/** Use this for pure virtual classes, e.g. class SAL_NO_VTABLE Foo { ...
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This hinders the compiler from setting a generic vtable stating that
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a pure virtual function was called and thus slightly reduces code size.
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*/
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#ifdef _MSC_VER
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# define SAL_NO_VTABLE __declspec(novtable)
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#else
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# define SAL_NO_VTABLE
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#endif
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#ifdef _WIN32
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# pragma pack(push, 8)
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#endif
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/** This is the binary specification of a SAL sequence.
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*/
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typedef struct _sal_Sequence
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{
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/** reference count of sequence<br>
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*/
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sal_Int32 nRefCount;
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/** element count<br>
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*/
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sal_Int32 nElements;
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/** elements array<br>
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*/
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char elements[1];
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} sal_Sequence;
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#define SAL_SEQUENCE_HEADER_SIZE ((sal_Size) offsetof(sal_Sequence,elements))
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#if defined( _WIN32)
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#pragma pack(pop)
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#endif
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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/** Nothrow specification for C functions.
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This is a macro so it can expand to nothing in C code.
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*/
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#if defined __cplusplus
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#if __cplusplus >= 201103L
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#define SAL_THROW_EXTERN_C() noexcept
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#else
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#define SAL_THROW_EXTERN_C() throw ()
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#endif
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#else
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#define SAL_THROW_EXTERN_C()
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#endif
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#ifdef __cplusplus
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/** To markup destructors that coverity warns might throw exceptions
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which won't throw in practice, or where std::terminate is
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an acceptable response if they do
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*/
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#if defined(LIBO_INTERNAL_ONLY) && defined(__COVERITY__)
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# define COVERITY_NOEXCEPT_FALSE noexcept(false)
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#else
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# define COVERITY_NOEXCEPT_FALSE
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#endif
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enum __sal_NoAcquire
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{
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/** definition of a no acquire enum for ctors
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*/
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SAL_NO_ACQUIRE
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};
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namespace com { namespace sun { namespace star { } } }
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/** short-circuit extra-verbose API namespaces
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@since LibreOffice 4.0
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*/
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namespace css = ::com::sun::star;
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/** C++11 "= delete" feature.
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For LIBO_INTERNAL_ONLY, calling a deleted function will cause a compile-time
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error, while otherwise it will only cause a link-time error as the declared
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function is not defined.
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@since LibreOffice 4.1
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*/
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#if defined LIBO_INTERNAL_ONLY
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#define SAL_DELETED_FUNCTION = delete
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#else
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#define SAL_DELETED_FUNCTION
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#endif
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/** C++11 "override" feature.
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For LIBO_INTERNAL_ONLY, force the method to override an existing method in
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parent, error out if the method with the correct signature does not exist.
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@since LibreOffice 4.1
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*/
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#if defined LIBO_INTERNAL_ONLY
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#define SAL_OVERRIDE override
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#else
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#define SAL_OVERRIDE
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#endif
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/** C++11 "constexpr" feature.
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For LIBO_INTERNAL_ONLY, declare that it's possible to evaluate the value
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at compile time.
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@since LibreOffice 7.2
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*/
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#if defined LIBO_INTERNAL_ONLY
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#define SAL_CONSTEXPR constexpr
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#else
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#define SAL_CONSTEXPR
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#endif
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/** Macro for C++11 "noexcept" vs. "throw ()" exception specification.
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The latter has been removed completely from C++20.
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@since LibreOffice 7.2
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*/
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#if __cplusplus >= 201103L
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#define SAL_NOEXCEPT noexcept
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#else
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#define SAL_NOEXCEPT throw ()
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#endif
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#endif /* __cplusplus */
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#ifdef __cplusplus
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namespace sal {
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/**
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A static_cast between integral types, to avoid C++ compiler warnings.
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In C++ source code, use sal::static_int_cast<T>(n) instead of
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static_cast<T>(n) whenever a compiler warning about integral type problems
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shall be silenced. That way, source code that needs to be modified when the
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type of any of the expressions involved in the compiler warning is changed
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can be found more easily.
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Both template arguments T1 and T2 must be integral types.
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*/
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template< typename T1, typename T2 > inline T1 static_int_cast(T2 n) {
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return static_cast< T1 >(n);
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}
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}
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#else /* __cplusplus */
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/**
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A cast between integer types, to avoid C compiler warnings.
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In C source code, use SAL_INT_CAST(type, expr) instead of ((type) (expr))
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whenever a compiler warning about integer type problems shall be silenced.
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That way, source code that needs to be modified when the type of any of the
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expressions involved in the compiler warning is changed can be found more
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easily.
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The argument 'type' must be an integer type and the argument 'expr' must be
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an integer expression. Both arguments are evaluated exactly once.
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*/
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#define SAL_INT_CAST(type, expr) ((type) (expr))
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#endif /* __cplusplus */
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/**
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Use as follows:
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SAL_DEPRECATED("Don't use, it's evil.") void doit(int nPara);
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*/
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#if defined __GNUC__ || defined __clang__
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#if defined LIBO_INTERNAL_ONLY
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# define SAL_DEPRECATED(message) __attribute__((deprecated(message)))
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#else
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# define SAL_DEPRECATED(message) __attribute__((deprecated))
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#endif
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#elif defined(_MSC_VER)
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# define SAL_DEPRECATED(message) __declspec(deprecated(message))
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#else
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# define SAL_DEPRECATED(message)
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#endif
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/**
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This macro is used in cppumaker-generated include files, to tag entities that
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are marked as @deprecated in UNOIDL.
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It causes deprecation warnings to be generated in external code, but for now
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is silenced in internal code. It would need some substantial clean-up of
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internal code to fix all warnings/errors generated by it. (Once that is
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done, it can become a synonym for SAL_DEPRECATED under LIBO_INTERNAL_ONLY,
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too. Completely removing the macro then would be incompatible, in case there
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are include files still around generated with a cppumaker that emitted it.)
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*/
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#ifdef LIBO_INTERNAL_ONLY
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# define SAL_DEPRECATED_INTERNAL(message)
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#else
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# define SAL_DEPRECATED_INTERNAL(message) SAL_DEPRECATED(message)
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#endif
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/**
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Use as follows:
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SAL_WNODEPRECATED_DECLARATIONS_PUSH
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\::std::auto_ptr<X> ...
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SAL_WNODEPRECATED_DECLARATIONS_POP
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*/
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#if defined LIBO_INTERNAL_ONLY && defined __GNUC__
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#define SAL_WNODEPRECATED_DECLARATIONS_PUSH \
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_Pragma(SAL_STRINGIFY_ARG(GCC diagnostic push)) \
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_Pragma(SAL_STRINGIFY_ARG(GCC diagnostic ignored "-Wdeprecated-declarations"))
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#define SAL_WNODEPRECATED_DECLARATIONS_POP \
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_Pragma(SAL_STRINGIFY_ARG(GCC diagnostic pop))
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#else
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# define SAL_WNODEPRECATED_DECLARATIONS_PUSH
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# define SAL_WNODEPRECATED_DECLARATIONS_POP
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#endif
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/**
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Use as follows:
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SAL_WNOUNREACHABLE_CODE_PUSH
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function definition
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SAL_WNOUNREACHABLE_CODE_POP
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Useful in cases where the compiler is "too clever" like when doing
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link-time code generation, and noticing that a called function
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always throws, and fixing the problem cleanly so that it produces
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no warnings in normal non-LTO compilations either is not easy.
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*/
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#ifdef _MSC_VER
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#define SAL_WNOUNREACHABLE_CODE_PUSH \
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__pragma(warning(push)) \
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__pragma(warning(disable:4702)) \
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__pragma(warning(disable:4722))
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#define SAL_WNOUNREACHABLE_CODE_POP \
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__pragma(warning(pop))
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#else
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/* Add definitions for GCC and Clang if needed */
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#define SAL_WNOUNREACHABLE_CODE_PUSH
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#define SAL_WNOUNREACHABLE_CODE_POP
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#endif
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/** Annotate unused but required C++ function parameters.
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An unused parameter is required if the function needs to adhere to a given
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type (e.g., if its address is assigned to a function pointer of a specific
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type, or if it is called from template code). This annotation helps static
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analysis tools suppress false warnings. In the case of virtual functions
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(where unused required parameters are common, too), the annotation is not
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required (as static analysis tools can themselves derive the information
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whether a function is virtual).
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Use the annotation in function definitions like
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void f(SAL_UNUSED_PARAMETER int) {}
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C does not allow unnamed parameters, anyway, so a function definition like
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the above needs to be written there as
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void f(int dummy) { (void) dummy; / * avoid warnings * / }
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without a SAL_UNUSED_PARAMETER annotation.
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@since LibreOffice 3.6
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*/
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#if defined __cplusplus
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#if defined __GNUC__ || defined __clang__
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#define SAL_UNUSED_PARAMETER __attribute__ ((unused))
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#else
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#define SAL_UNUSED_PARAMETER
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#endif
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#endif
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/**
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Annotate classes where a compiler should warn if an instance is unused.
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The compiler cannot warn about unused instances if they have non-trivial
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or external constructors or destructors. Classes marked with SAL_WARN_UNUSED
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will be warned about.
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@since LibreOffice 4.0
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*/
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#if defined LIBO_INTERNAL_ONLY && (defined __GNUC__ || defined __clang__)
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#define SAL_WARN_UNUSED __attribute__((warn_unused))
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#else
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#define SAL_WARN_UNUSED
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#endif
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/// @cond INTERNAL
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#if defined __GNUC__ || defined __clang__
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// Macro to try to catch and warn on assignments inside expr.
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# define SAL_DETAIL_BOOLEAN_EXPR(expr) \
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__extension__ ({ \
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int sal_boolean_var_; \
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if (expr) \
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sal_boolean_var_ = 1; \
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else \
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sal_boolean_var_ = 0; \
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sal_boolean_var_; \
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})
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/** An optimization annotation: denotes that expression is likely to be true.
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Use it to annotate paths that we think are likely eg.
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if (SAL_LIKELY(ptr != nullptr))
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// this path is the one that is ~always taken.
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@since LibreOffice 5.2
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Returns: the boolean value of expr (expressed as either int 1 or 0)
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*/
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# define SAL_LIKELY(expr) __builtin_expect(SAL_DETAIL_BOOLEAN_EXPR((expr)), 1)
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/** An optimization annotation: denotes that expression is unlikely to be true.
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Use it to annotate paths that we think are likely eg.
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if (SAL_UNLIKELY(ptr != nullptr))
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// this path is the one that is ~never taken.
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@since LibreOffice 5.2
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Returns: the boolean value of expr (expressed as either int 1 or 0)
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*/
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# define SAL_UNLIKELY(expr) __builtin_expect(SAL_DETAIL_BOOLEAN_EXPR((expr)), 0)
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/** An optimization annotation: tells the compiler to work harder at this code
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If the SAL_HOT annotation is present on a function or a label then
|
|
subsequent code statements may have more aggressive compiler
|
|
optimization and in-lining work performed on them.
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|
In addition this code can end up in a special section, to be
|
|
grouped with other frequently used code.
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|
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@since LibreOffice 5.2
|
|
*/
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|
# define SAL_HOT __attribute__((hot))
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|
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/** An optimization annotation: tells the compiler to work less on this code
|
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|
If the SAL_COLD annotation is present on a function or a label then
|
|
subsequent code statements are unlikely to be performed except in
|
|
exceptional circumstances, and optimizing for code-size rather
|
|
than performance is preferable.
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|
In addition this code can end up in a special section, to be grouped
|
|
with (and away from) other more frequently used code, to improve
|
|
locality of reference.
|
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|
|
@since LibreOffice 5.2
|
|
*/
|
|
# define SAL_COLD __attribute__((cold))
|
|
#else
|
|
# define SAL_LIKELY(expr) (expr)
|
|
# define SAL_UNLIKELY(expr) (expr)
|
|
# define SAL_HOT
|
|
# define SAL_COLD
|
|
#endif
|
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|
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/// @endcond
|
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|
|
/// @cond INTERNAL
|
|
/** Annotate pointer-returning functions to indicate that such a pointer
|
|
is never nullptr.
|
|
|
|
Note that MSVC supports this feature via it's SAL _Ret_notnull_
|
|
annotation, but since it's in a completely different place on
|
|
the function declaration, it's a little hard to support both.
|
|
|
|
@since LibreOffice 5.5
|
|
*/
|
|
#ifndef __has_attribute
|
|
#define __has_attribute(x) 0
|
|
#endif
|
|
|
|
#if defined LIBO_INTERNAL_ONLY && ((defined __GNUC__ && !defined __clang__) || (defined __clang__ && __has_attribute(returns_nonnull)))
|
|
#define SAL_RETURNS_NONNULL __attribute__((returns_nonnull))
|
|
#else
|
|
#define SAL_RETURNS_NONNULL
|
|
#endif
|
|
/// @endcond
|
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|
|
#endif // INCLUDED_SAL_TYPES_H
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|
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|