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/raw_ostream.h" 20 21 namespace llvm { 22 namespace support { 23 24 namespace endian { 25 26 template <typename value_type> 27 inline void write(raw_ostream &os, value_type value, endianness endian) { 28 value = byte_swap<value_type>(value, endian); 29 os.write((const char *)&value, sizeof(value_type)); 30 } 31 32 template <> 33 inline void write<float>(raw_ostream &os, float value, endianness endian) { 34 write(os, FloatToBits(value), endian); 35 } 36 37 template <> 38 inline void write<double>(raw_ostream &os, double value, 39 endianness endian) { 40 write(os, DoubleToBits(value), endian); 41 } 42 43 template <typename value_type> 44 inline void write(raw_ostream &os, ArrayRef<value_type> vals, 45 endianness endian) { 46 for (value_type v : vals) 47 write(os, v, endian); 48 } 49 50 /// Adapter to write values to a stream in a particular byte order. 51 struct Writer { 52 raw_ostream &OS; 53 endianness Endian; 54 Writer(raw_ostream &OS, endianness Endian) : OS(OS), Endian(Endian) {} 55 template <typename value_type> void write(ArrayRef<value_type> Val) { 56 endian::write(OS, Val, Endian); 57 } 58 template <typename value_type> void write(value_type Val) { 59 endian::write(OS, Val, Endian); 60 } 61 }; 62 63 } // end namespace endian 64 65 } // end namespace support 66 } // end namespace llvm 67 68 #endif 69