base/format_macros.h

   1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef BASE_FORMAT_MACROS_H_
   6 #define BASE_FORMAT_MACROS_H_
   7 #pragma once
   8
   9 // This file defines the format macros for some integer types.
  10
  11 // To print a 64-bit value in a portable way:
  12 //   int64_t value;
  13 //   printf("xyz:%" PRId64, value);
  14 // The "d" in the macro corresponds to %d; you can also use PRIu64 etc.
  15 //
  16 // For wide strings, prepend "Wide" to the macro:
  17 //   int64_t value;
  18 //   StringPrintf(L"xyz: %" WidePRId64, value);
  19 //
  20 // To print a size_t value in a portable way:
  21 //   size_t size;
  22 //   printf("xyz: %" PRIuS, size);
  23 // The "u" in the macro corresponds to %u, and S is for "size".
  24
  25 #include "build/build_config.h"
  26
  27 #if defined(OS_POSIX)
  28
  29 #if (defined(_INTTYPES_H) || defined(_INTTYPES_H_)) && !defined(PRId64)
  30 #error "inttypes.h has already been included before this header file, but "
  31 #error "without __STDC_FORMAT_MACROS defined."
  32 #endif
  33
  34 #if !defined(__STDC_FORMAT_MACROS)
  35 #define __STDC_FORMAT_MACROS
  36 #endif
  37
  38 #include <inttypes.h>
  39
  40 // GCC will concatenate wide and narrow strings correctly, so nothing needs to
  41 // be done here.
  42 #define WidePRId64 PRId64
  43 #define WidePRIu64 PRIu64
  44 #define WidePRIx64 PRIx64
  45
  46 #if !defined(PRIuS)
  47 #define PRIuS "zu"
  48 #endif
  49
  50 #else  // OS_WIN
  51
  52 #if !defined(PRId64)
  53 #define PRId64 "I64d"
  54 #endif
  55
  56 #if !defined(PRIu64)
  57 #define PRIu64 "I64u"
  58 #endif
  59
  60 #if !defined(PRIx64)
  61 #define PRIx64 "I64x"
  62 #endif
  63
  64 #define WidePRId64 L"I64d"
  65 #define WidePRIu64 L"I64u"
  66 #define WidePRIx64 L"I64x"
  67
  68 #if !defined(PRIuS)
  69 #define PRIuS "Iu"
  70 #endif
  71
  72 #endif
  73
  74 #endif  // BASE_FORMAT_MACROS_H_