js/src/jsstdint.h

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * vim: set ts=8 sw=4 et tw=78:
   3  *
   4  * ***** BEGIN LICENSE BLOCK *****
   5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version
   8  * 1.1 (the "License"); you may not use this file except in compliance with
   9  * the License. You may obtain a copy of the License at
  10  * http://www.mozilla.org/MPL/
  11  *
  12  * Software distributed under the License is distributed on an "AS IS" basis,
  13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  14  * for the specific language governing rights and limitations under the
  15  * License.
  16  *
  17  * The Original Code is mozilla.org code.
  18  *
  19  * The Initial Developer of the Original Code is
  20  * Jim Blandy
  21  * Portions created by the Initial Developer are Copyright (C) 2008
  22  * the Initial Developer. All Rights Reserved.
  23  *
  24  * Contributor(s):
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either of the GNU General Public License Version 2 or later (the "GPL"),
  28  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
  31  * under the terms of either the GPL or the LGPL, and not to allow others to
  32  * use your version of this file under the terms of the MPL, indicate your
  33  * decision by deleting the provisions above and replace them with the notice
  34  * and other provisions required by the GPL or the LGPL. If you do not delete
  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39
  40 /*
  41  * This header provides definitions for the <stdint.h> types we use,
  42  * even on systems that lack <stdint.h>.
  43  *
  44  * NOTE: This header should only be included in private SpiderMonkey
  45  * code; public headers should use only the JS{Int,Uint}N types; see
  46  * the comment for them in "jsinttypes.h".
  47  *
  48  * At the moment, these types are not widely used within SpiderMonkey;
  49  * this file is meant to make existing uses portable, and to allow us
  50  * to transition portably to using them more, if desired.
  51  */
  52
  53 #ifndef jsstdint_h___
  54 #define jsstdint_h___
  55
  56 #include "jsinttypes.h"
  57
  58 /* If we have a working stdint.h, then jsinttypes.h has already
  59    defined the standard integer types.  Otherwise, define the standard
  60    names in terms of the 'JS' types.  */
  61 #if ! defined(JS_HAVE_STDINT_H) && \
  62     ! defined(JS_SYS_TYPES_H_DEFINES_EXACT_SIZE_TYPES)
  63
  64 typedef JSInt8  int8_t;
  65 typedef JSInt16 int16_t;
  66 typedef JSInt32 int32_t;
  67 typedef JSInt64 int64_t;
  68
  69 typedef JSUint8  uint8_t;
  70 typedef JSUint16 uint16_t;
  71 typedef JSUint32 uint32_t;
  72 typedef JSUint64 uint64_t;
  73
  74 /* Suppress other, conflicting attempts to define stdint-bits. */
  75 #define _STDINT_H
  76
  77 /* If JS_STDDEF_H_HAS_INTPTR_T or JS_CRTDEFS_H_HAS_INTPTR_T are
  78    defined, then jsinttypes.h included the given header, which
  79    introduced definitions for intptr_t and uintptr_t.  Otherwise,
  80    define the standard names in terms of the 'JS' types.  */
  81 #if !defined(JS_STDDEF_H_HAS_INTPTR_T) && !defined(JS_CRTDEFS_H_HAS_INTPTR_T)
  82 typedef JSIntPtr  intptr_t;
  83 typedef JSUintPtr uintptr_t;
  84 #endif
  85
  86 #if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS)
  87
  88 #define INT8_MAX  127
  89 #define INT8_MIN  (-INT8_MAX - 1)
  90 #define INT16_MAX 32767
  91 #define INT16_MIN (-INT16_MAX - 1)
  92 #define INT32_MAX 2147483647
  93 #define INT32_MIN (-INT32_MAX - 1)
  94 #define INT64_MAX 9223372036854775807LL
  95 #define INT64_MIN (-INT64_MAX - 1)
  96
  97 #define UINT8_MAX  255
  98 #define UINT16_MAX 65535
  99 #define UINT32_MAX 4294967295U
 100 #define UINT64_MAX 18446744073709551615ULL
 101
 102 /*
 103  * These are technically wrong as they can't be used in the preprocessor, but
 104  * we would require compiler assistance, and at the moment we don't need
 105  * preprocessor-correctness.
 106  */
 107 #ifdef _MSC_VER
 108 #undef SIZE_MAX
 109 #endif
 110
 111 #define INTPTR_MAX  ((intptr_t) (UINTPTR_MAX >> 1))
 112 #define INTPTR_MIN  (intptr_t(uintptr_t(INTPTR_MAX) + uintptr_t(1)))
 113 #define UINTPTR_MAX ((uintptr_t) -1)
 114 #define SIZE_MAX UINTPTR_MAX
 115 #define PTRDIFF_MAX INTPTR_MAX
 116 #define PTRDIFF_MIN INTPTR_MIN
 117
 118 #endif /* !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) */
 119
 120 #endif /* JS_HAVE_STDINT_H */
 121
 122 #endif /* jsstdint_h___ */