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The C and C++ Include Header Files

/usr/include/unicode/ptypes.h

$ cat -n /usr/include/unicode/ptypes.h

     1	// Â© 2016 and later: Unicode, Inc. and others.
     2	// License & terms of use: http://www.unicode.org/copyright.html
     3	/*
     4	******************************************************************************
     5	*
     6	*   Copyright (C) 1997-2012, International Business Machines
     7	*   Corporation and others.  All Rights Reserved.
     8	*
     9	******************************************************************************
    10	*
    11	*  FILE NAME : ptypes.h
    12	*
    13	*   Date        Name        Description
    14	*   05/13/98    nos         Creation (content moved here from ptypes.h).
    15	*   03/02/99    stephen     Added AS400 support.
    16	*   03/30/99    stephen     Added Linux support.
    17	*   04/13/99    stephen     Reworked for autoconf.
    18	*   09/18/08    srl         Moved basic types back to ptypes.h from platform.h
    19	******************************************************************************
    20	*/
    21	
    22	/**
    23	 * \file
    24	 * \brief C API: Definitions of integer types of various widths
    25	 */
    26	
    27	#ifndef _PTYPES_H
    28	#define _PTYPES_H
    29	
    30	/**
    31	 * \def __STDC_LIMIT_MACROS
    32	 * According to the Linux stdint.h, the ISO C99 standard specifies that in C++ implementations
    33	 * macros like INT32_MIN and UINTPTR_MAX should only be defined if explicitly requested.
    34	 * We need to define __STDC_LIMIT_MACROS before including stdint.h in C++ code
    35	 * that uses such limit macros.
    36	 * @internal
    37	 */
    38	#ifndef __STDC_LIMIT_MACROS
    39	#define __STDC_LIMIT_MACROS
    40	#endif
    41	
    42	/* NULL, size_t, wchar_t */
    43	#include <stddef.h>
    44	
    45	/*
    46	 * If all compilers provided all of the C99 headers and types,
    47	 * we would just unconditionally #include <stdint.h> here
    48	 * and not need any of the stuff after including platform.h.
    49	 */
    50	
    51	/* Find out if we have stdint.h etc. */
    52	#include "unicode/platform.h"
    53	
    54	/*===========================================================================*/
    55	/* Generic data types                                                        */
    56	/*===========================================================================*/
    57	
    58	/* If your platform does not have the <stdint.h> header, you may
    59	   need to edit the typedefs in the #else section below.
    60	   Use #if...#else...#endif with predefined compiler macros if possible. */
    61	#if U_HAVE_STDINT_H
    62	
    63	/*
    64	 * We mostly need <stdint.h> (which defines the standard integer types) but not <inttypes.h>.
    65	 * <inttypes.h> includes <stdint.h> and adds the printf/scanf helpers PRId32, SCNx16 etc.
    66	 * which we almost never use, plus stuff like imaxabs() which we never use.
    67	 */
    68	#include <stdint.h>
    69	
    70	#if U_PLATFORM == U_PF_OS390
    71	/* The features header is needed to get (u)int64_t sometimes. */
    72	#include <features.h>
    73	/* z/OS has <stdint.h>, but some versions are missing uint8_t (APAR PK62248). */
    74	#if !defined(__uint8_t)
    75	#define __uint8_t 1
    76	typedef unsigned char uint8_t;
    77	#endif
    78	#endif /* U_PLATFORM == U_PF_OS390 */
    79	
    80	#elif U_HAVE_INTTYPES_H
    81	
    82	#   include <inttypes.h>
    83	
    84	#else /* neither U_HAVE_STDINT_H nor U_HAVE_INTTYPES_H */
    85	
    86	/// \cond
    87	#if ! U_HAVE_INT8_T
    88	typedef signed char int8_t;
    89	#endif
    90	
    91	#if ! U_HAVE_UINT8_T
    92	typedef unsigned char uint8_t;
    93	#endif
    94	
    95	#if ! U_HAVE_INT16_T
    96	typedef signed short int16_t;
    97	#endif
    98	
    99	#if ! U_HAVE_UINT16_T
   100	typedef unsigned short uint16_t;
   101	#endif
   102	
   103	#if ! U_HAVE_INT32_T
   104	typedef signed int int32_t;
   105	#endif
   106	
   107	#if ! U_HAVE_UINT32_T
   108	typedef unsigned int uint32_t;
   109	#endif
   110	
   111	#if ! U_HAVE_INT64_T
   112	#ifdef _MSC_VER
   113	    typedef signed __int64 int64_t;
   114	#else
   115	    typedef signed long long int64_t;
   116	#endif
   117	#endif
   118	
   119	#if ! U_HAVE_UINT64_T
   120	#ifdef _MSC_VER
   121	    typedef unsigned __int64 uint64_t;
   122	#else
   123	    typedef unsigned long long uint64_t;
   124	#endif
   125	#endif
   126	/// \endcond
   127	
   128	#endif /* U_HAVE_STDINT_H / U_HAVE_INTTYPES_H */
   129	
   130	#endif /* _PTYPES_H */
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