LLVM  6.0.0svn
EndianStream.h
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1 //===- EndianStream.h - Stream ops with endian specific data ----*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines utilities for operating on streams that have endian
11 // specific data.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_SUPPORT_ENDIANSTREAM_H
16 #define LLVM_SUPPORT_ENDIANSTREAM_H
17 
18 #include "llvm/ADT/ArrayRef.h"
19 #include "llvm/Support/Endian.h"
21 
22 namespace llvm {
23 namespace support {
24 
25 namespace endian {
26 /// Adapter to write values to a stream in a particular byte order.
27 template <endianness endian> struct Writer {
29  Writer(raw_ostream &OS) : OS(OS) {}
30  template <typename value_type> void write(ArrayRef<value_type> Vals) {
31  for (value_type V : Vals)
32  write(V);
33  }
34  template <typename value_type> void write(value_type Val) {
35  Val = byte_swap<value_type, endian>(Val);
36  OS.write((const char *)&Val, sizeof(value_type));
37  }
38 };
39 
40 template <>
41 template <>
42 inline void Writer<little>::write<float>(float Val) {
43  write(FloatToBits(Val));
44 }
45 
46 template <>
47 template <>
48 inline void Writer<little>::write<double>(double Val) {
49  write(DoubleToBits(Val));
50 }
51 
52 template <>
53 template <>
54 inline void Writer<big>::write<float>(float Val) {
55  write(FloatToBits(Val));
56 }
57 
58 template <>
59 template <>
60 inline void Writer<big>::write<double>(double Val) {
61  write(DoubleToBits(Val));
62 }
63 
64 } // end namespace endian
65 
66 } // end namespace support
67 } // end namespace llvm
68 
69 #endif
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
void write(value_type Val)
Definition: EndianStream.h:34
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:33
uint32_t FloatToBits(float Float)
This function takes a float and returns the bit equivalent 32-bit integer.
Definition: MathExtras.h:593
void write(ArrayRef< value_type > Vals)
Definition: EndianStream.h:30
raw_ostream & write(unsigned char C)
uint64_t DoubleToBits(double Double)
This function takes a double and returns the bit equivalent 64-bit integer.
Definition: MathExtras.h:583
Adapter to write values to a stream in a particular byte order.
Definition: EndianStream.h:27
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:44