1 //===- EndianStream.h - Stream ops with endian specific data ----*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines utilities for operating on streams that have endian 10 // specific data. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_SUPPORT_ENDIANSTREAM_H 15 #define LLVM_SUPPORT_ENDIANSTREAM_H 16 17 #include "llvm/ADT/ArrayRef.h" 18 #include "llvm/Support/Endian.h" 19 #include "llvm/Support/MathExtras.h" 20 #include "llvm/Support/raw_ostream.h" 21 22 namespace llvm { 23 namespace support { 24 25 namespace endian { 26 27 template <typename value_type> 28 inline void write(raw_ostream &os, value_type value, endianness endian) { 29 value = byte_swap<value_type>(value, endian); 30 os.write((const char *)&value, sizeof(value_type)); 31 } 32 33 template <> 34 inline void write<float>(raw_ostream &os, float value, endianness endian) { 35 write(os, FloatToBits(value), endian); 36 } 37 38 template <> 39 inline void write<double>(raw_ostream &os, double value, 40 endianness endian) { 41 write(os, DoubleToBits(value), endian); 42 } 43 44 template <typename value_type> 45 inline void write(raw_ostream &os, ArrayRef<value_type> vals, 46 endianness endian) { 47 for (value_type v : vals) 48 write(os, v, endian); 49 } 50 51 /// Adapter to write values to a stream in a particular byte order. 52 struct Writer { 53 raw_ostream &OS; 54 endianness Endian; 55 Writer(raw_ostream &OS, endianness Endian) : OS(OS), Endian(Endian) {} 56 template <typename value_type> void write(ArrayRef<value_type> Val) { 57 endian::write(OS, Val, Endian); 58 } 59 template <typename value_type> void write(value_type Val) { 60 endian::write(OS, Val, Endian); 61 } 62 }; 63 64 } // end namespace endian 65 66 } // end namespace support 67 } // end namespace llvm 68 69 #endif 70