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