The Tor Browser: extensions/universalchardet/src/base/nsPkgInt.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsPkgInt_h__

     7 #define nsPkgInt_h__

     8 #include "nscore.h"

    10 typedef enum {

    11   eIdxSft4bits  = 3,

    12   eIdxSft8bits  = 2,

    13   eIdxSft16bits = 1

    14 } nsIdxSft;

    16 typedef enum {

    17   eSftMsk4bits  = 7,

    18   eSftMsk8bits  = 3,

    19   eSftMsk16bits = 1

    20 } nsSftMsk;

    22 typedef enum {

    23   eBitSft4bits  = 2,

    24   eBitSft8bits  = 3,

    25   eBitSft16bits = 4

    26 } nsBitSft;

    28 typedef enum {

    29   eUnitMsk4bits  = 0x0000000FL,

    30   eUnitMsk8bits  = 0x000000FFL,

    31   eUnitMsk16bits = 0x0000FFFFL

    32 } nsUnitMsk;

    34 typedef struct nsPkgInt {

    35   nsIdxSft  idxsft;

    36   nsSftMsk  sftmsk;

    37   nsBitSft  bitsft;

    38   nsUnitMsk unitmsk;

    39   const uint32_t* const data;

    40 } nsPkgInt;

    43 #define PCK16BITS(a,b)            ((uint32_t)(((b) << 16) | (a)))

    45 #define PCK8BITS(a,b,c,d)         PCK16BITS( ((uint32_t)(((b) << 8) | (a))),  \

    46                                              ((uint32_t)(((d) << 8) | (c))))

    48 #define PCK4BITS(a,b,c,d,e,f,g,h) PCK8BITS(  ((uint32_t)(((b) << 4) | (a))), \

    49                                              ((uint32_t)(((d) << 4) | (c))), \

    50                                              ((uint32_t)(((f) << 4) | (e))), \

    51                                              ((uint32_t)(((h) << 4) | (g))) )

    53 #define GETFROMPCK(i, c) \

    54  (((((c).data)[(i)>>(c).idxsft])>>(((i)&(c).sftmsk)<<(c).bitsft))&(c).unitmsk)

    56 #endif /* nsPkgInt_h__ */

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