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git.saurik.com Git - apple/ld64.git/blob - src/ld/code-sign-blobs/endian.h
f312e43daecd9254d65721627fdcd360f711e6d1
2 * Copyright (c) 2002-2004 Apple Computer, Inc. All Rights Reserved.
4 * @APPLE_LICENSE_HEADER_START@
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
21 * @APPLE_LICENSE_HEADER_END@
31 #include <machine/endian.h>
32 #include <libkern/OSByteOrder.h>
33 //#include <security_utilities/utilities.h>
40 // Encode/decode operations by type, overloaded.
41 // You can use these functions directly, but consider using
42 // the higher-level constructs below instead.
45 static inline unsigned long h2n(unsigned long v
) { return OSSwapHostToBigInt64(v
); }
46 static inline unsigned long n2h(unsigned long v
) { return OSSwapBigToHostInt64(v
); }
47 static inline unsigned long flip(unsigned long v
) { return OSSwapInt64(v
); }
48 static inline signed long h2n(signed long v
) { return OSSwapHostToBigInt64(v
); }
49 static inline signed long n2h(signed long v
) { return OSSwapBigToHostInt64(v
); }
50 static inline signed long flip(signed long v
) { return OSSwapInt64(v
); }
52 static inline unsigned long h2n(unsigned long v
) { return htonl(v
); }
53 static inline unsigned long n2h(unsigned long v
) { return ntohl(v
); }
54 static inline unsigned long flip(unsigned long v
) { return OSSwapInt32(v
); }
55 static inline signed long h2n(signed long v
) { return htonl(v
); }
56 static inline signed long n2h(signed long v
) { return ntohl(v
); }
57 static inline signed long flip(signed long v
) { return OSSwapInt32(v
); }
60 static inline unsigned long long h2n(unsigned long long v
) { return OSSwapHostToBigInt64(v
); }
61 static inline unsigned long long n2h(unsigned long long v
) { return OSSwapBigToHostInt64(v
); }
62 static inline unsigned long long flip(unsigned long long v
) { return OSSwapInt64(v
); }
63 static inline long long h2n(long long v
) { return OSSwapHostToBigInt64(v
); }
64 static inline long long n2h(long long v
) { return OSSwapBigToHostInt64(v
); }
65 static inline long long flip(long long v
) { return OSSwapInt64(v
); }
67 static inline unsigned int h2n(unsigned int v
) { return htonl(v
); }
68 static inline unsigned int n2h(unsigned int v
) { return ntohl(v
); }
69 static inline unsigned int flip(unsigned int v
) { return OSSwapInt32(v
); }
70 static inline signed int h2n(int v
) { return htonl(v
); }
71 static inline signed int n2h(int v
) { return ntohl(v
); }
72 static inline signed int flip(int v
) { return OSSwapInt32(v
); }
74 static inline unsigned short h2n(unsigned short v
) { return htons(v
); }
75 static inline unsigned short n2h(unsigned short v
) { return ntohs(v
); }
76 static inline unsigned short flip(unsigned short v
) { return OSSwapInt16(v
); }
77 static inline signed short h2n(signed short v
) { return htons(v
); }
78 static inline signed short n2h(signed short v
) { return ntohs(v
); }
79 static inline signed short flip(signed short v
) { return OSSwapInt16(v
); }
81 static inline unsigned char h2n(unsigned char v
) { return v
; }
82 static inline unsigned char n2h(unsigned char v
) { return v
; }
83 static inline unsigned char flip(unsigned char v
) { return v
; }
84 static inline signed char h2n(signed char v
) { return v
; }
85 static inline signed char n2h(signed char v
) { return v
; }
86 static inline signed char flip(signed char v
) { return v
; }
93 static inline Base
*h2n(Base
*p
) { return (Base
*)h2n(uintptr_t(p
)); }
96 static inline Base
*n2h(Base
*p
) { return (Base
*)n2h(uintptr_t(p
)); }
100 // In-place fix operations
102 template <class Type
>
103 static inline void h2ni(Type
&v
) { v
= h2n(v
); }
105 template <class Type
>
106 static inline void n2hi(Type
&v
) { v
= n2h(v
); }
109 // Endian<SomeType> keeps NBO values in memory and converts
110 // during loads and stores. This presumes that you are using
111 // memory blocks thare are read/written/mapped as amorphous byte
112 // streams, but want to be byte-order clean using them.
114 // The generic definition uses h2n/n2h to flip bytes. Feel free
115 // to declare specializations of Endian<T> as appropriate.
117 // Note well that the address of an Endian<T> is not an address-of-T,
118 // and there is no conversion available.
120 template <class Type
>
124 Endian() : mValue(Type(0)) { }
125 Endian(Value v
) : mValue(h2n(v
)) { }
127 operator Value () const { return n2h(mValue
); }
128 Endian
&operator = (Value v
) { mValue
= h2n(v
); return *this; }
135 } // end namespace Security
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