michael@0: /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsPkgInt_h__
michael@0: #define nsPkgInt_h__
michael@0: #include "nscore.h"
michael@0: 
michael@0: typedef enum {
michael@0:   eIdxSft4bits  = 3,
michael@0:   eIdxSft8bits  = 2,
michael@0:   eIdxSft16bits = 1
michael@0: } nsIdxSft; 
michael@0: 
michael@0: typedef enum {
michael@0:   eSftMsk4bits  = 7,
michael@0:   eSftMsk8bits  = 3,
michael@0:   eSftMsk16bits = 1
michael@0: } nsSftMsk; 
michael@0: 
michael@0: typedef enum {
michael@0:   eBitSft4bits  = 2,
michael@0:   eBitSft8bits  = 3,
michael@0:   eBitSft16bits = 4
michael@0: } nsBitSft; 
michael@0: 
michael@0: typedef enum {
michael@0:   eUnitMsk4bits  = 0x0000000FL,
michael@0:   eUnitMsk8bits  = 0x000000FFL,
michael@0:   eUnitMsk16bits = 0x0000FFFFL
michael@0: } nsUnitMsk; 
michael@0: 
michael@0: typedef struct nsPkgInt {
michael@0:   nsIdxSft  idxsft;
michael@0:   nsSftMsk  sftmsk;
michael@0:   nsBitSft  bitsft;
michael@0:   nsUnitMsk unitmsk;
michael@0:   const uint32_t* const data;
michael@0: } nsPkgInt;
michael@0: 
michael@0: 
michael@0: #define PCK16BITS(a,b)            ((uint32_t)(((b) << 16) | (a)))
michael@0: 
michael@0: #define PCK8BITS(a,b,c,d)         PCK16BITS( ((uint32_t)(((b) << 8) | (a))),  \
michael@0:                                              ((uint32_t)(((d) << 8) | (c))))
michael@0: 
michael@0: #define PCK4BITS(a,b,c,d,e,f,g,h) PCK8BITS(  ((uint32_t)(((b) << 4) | (a))), \
michael@0:                                              ((uint32_t)(((d) << 4) | (c))), \
michael@0:                                              ((uint32_t)(((f) << 4) | (e))), \
michael@0:                                              ((uint32_t)(((h) << 4) | (g))) )
michael@0: 
michael@0: #define GETFROMPCK(i, c) \
michael@0:  (((((c).data)[(i)>>(c).idxsft])>>(((i)&(c).sftmsk)<<(c).bitsft))&(c).unitmsk)
michael@0: 
michael@0: #endif /* nsPkgInt_h__ */
michael@0: