-/*
- * Copyright (c) 2002-2004 Apple Computer, Inc. All Rights Reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-/*
- * cssm utilities
- */
-#ifndef _H_ENDIAN
-#define _H_ENDIAN
-
-#include <machine/endian.h>
-#include <libkern/OSByteOrder.h>
-#include <security_utilities/utilities.h>
-#include <security_utilities/memutils.h>
-#include <security_utilities/debugging.h>
-
-namespace Security {
-
-
-//
-// Encode/decode operations by type, overloaded.
-// You can use these functions directly, but consider using
-// the higher-level constructs below instead.
-//
-#ifdef __LP64__
-static inline unsigned long h2n(unsigned long v) { return OSSwapHostToBigInt64(v); }
-static inline unsigned long n2h(unsigned long v) { return OSSwapBigToHostInt64(v); }
-static inline unsigned long flip(unsigned long v) { return OSSwapInt64(v); }
-static inline signed long h2n(signed long v) { return OSSwapHostToBigInt64(v); }
-static inline signed long n2h(signed long v) { return OSSwapBigToHostInt64(v); }
-static inline signed long flip(signed long v) { return OSSwapInt64(v); }
-#else
-static inline unsigned long h2n(unsigned long v) { return htonl(v); }
-static inline unsigned long n2h(unsigned long v) { return ntohl(v); }
-static inline unsigned long flip(unsigned long v) { return OSSwapInt32(v); }
-static inline signed long h2n(signed long v) { return htonl(v); }
-static inline signed long n2h(signed long v) { return ntohl(v); }
-static inline signed long flip(signed long v) { return OSSwapInt32(v); }
-#endif
-
-static inline unsigned long long h2n(unsigned long long v) { return OSSwapHostToBigInt64(v); }
-static inline unsigned long long n2h(unsigned long long v) { return OSSwapBigToHostInt64(v); }
-static inline unsigned long long flip(unsigned long long v) { return OSSwapInt64(v); }
-static inline long long h2n(long long v) { return OSSwapHostToBigInt64(v); }
-static inline long long n2h(long long v) { return OSSwapBigToHostInt64(v); }
-static inline long long flip(long long v) { return OSSwapInt64(v); }
-
-static inline unsigned int h2n(unsigned int v) { return htonl(v); }
-static inline unsigned int n2h(unsigned int v) { return ntohl(v); }
-static inline unsigned int flip(unsigned int v) { return OSSwapInt32(v); }
-static inline signed int h2n(int v) { return htonl(v); }
-static inline signed int n2h(int v) { return ntohl(v); }
-static inline signed int flip(int v) { return OSSwapInt32(v); }
-
-static inline unsigned short h2n(unsigned short v) { return htons(v); }
-static inline unsigned short n2h(unsigned short v) { return ntohs(v); }
-static inline unsigned short flip(unsigned short v) { return OSSwapInt16(v); }
-static inline signed short h2n(signed short v) { return htons(v); }
-static inline signed short n2h(signed short v) { return ntohs(v); }
-static inline signed short flip(signed short v) { return OSSwapInt16(v); }
-
-static inline unsigned char h2n(unsigned char v) { return v; }
-static inline unsigned char n2h(unsigned char v) { return v; }
-static inline unsigned char flip(unsigned char v) { return v; }
-static inline signed char h2n(signed char v) { return v; }
-static inline signed char n2h(signed char v) { return v; }
-static inline signed char flip(signed char v) { return v; }
-
-
-//
-// Flip pointers
-//
-template <class Base>
-static inline Base *h2n(Base *p) { return (Base *)h2n(uintptr_t(p)); }
-
-template <class Base>
-static inline Base *n2h(Base *p) { return (Base *)n2h(uintptr_t(p)); }
-
-
-//
-// In-place fix operations
-//
-template <class Type>
-static inline void h2ni(Type &v) { v = h2n(v); }
-
-template <class Type>
-static inline void n2hi(Type &v) { v = n2h(v); }
-
-//
-// Endian<SomeType> keeps NBO values in memory and converts
-// during loads and stores. This presumes that you are using
-// memory blocks thare are read/written/mapped as amorphous byte
-// streams, but want to be byte-order clean using them.
-//
-// The generic definition uses h2n/n2h to flip bytes. Feel free
-// to declare specializations of Endian<T> as appropriate.
-//
-// Note well that the address of an Endian<T> is not an address-of-T,
-// and there is no conversion available.
-//
-template <class Type>
-class Endian {
-public:
- typedef Type Value;
- Endian() : mValue(Type(0)) { }
- Endian(Value v) : mValue(h2n(v)) { }
-
- Type get () const { return n2h(mValue); }
- operator Value () const { return this->get(); }
- Endian &operator = (Value v) { mValue = h2n(v); return *this; }
-
-
-private:
- Value mValue;
-};
-
-
-} // end namespace Security
-
-
-#endif //_H_ENDIAN
projects / apple / security.git / blobdiff