Line data    Source code

       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"
      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    75760357 :   value = byte_swap<value_type>(value, endian);
      30    75762283 :   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           9 :   write(os, FloatToBits(value), endian);
      36             : }
      37             : 
      38             : template <>
      39             : inline void write<double>(raw_ostream &os, double value,
      40             :                           endianness endian) {
      41           5 :   write(os, DoubleToBits(value), endian);
      42             : }
      43             : 
      44             : template <typename value_type>
      45           3 : inline void write(raw_ostream &os, ArrayRef<value_type> vals,
      46             :                   endianness endian) {
      47         410 :   for (value_type v : vals)
      48         384 :     write(os, v, endian);
      49           3 : }
      50           1 : 
      51             : /// Adapter to write values to a stream in a particular byte order.
      52           3 : struct Writer {
      53             :   raw_ostream &OS;
      54           1 :   endianness Endian;
      55       44204 :   Writer(raw_ostream &OS, endianness Endian) : OS(OS), Endian(Endian) {}
      56           0 :   template <typename value_type> void write(ArrayRef<value_type> Val) {
      57           6 :     endian::write(OS, Val, Endian);
      58           8 :   }
      59    27847698 :   template <typename value_type> void write(value_type Val) {
      60    76286112 :     endian::write(OS, Val, Endian);
      61    27847696 :   }
      62      760526 : };
      63      760526 : 
      64      760526 : } // end namespace endian
      65      253591 : 
      66      253591 : } // end namespace support
      67      253594 : } // end namespace llvm
      68    26833502 : 
      69    26833502 : #endif